net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  * Copyright 2013-2014  Intel Mobile Communications GmbH
   6  * Copyright 2015-2017  Intel Deutschland GmbH
   7  */
   8
   9 #include <linux/if.h>
  10 #include <linux/module.h>
  11 #include <linux/err.h>
  12 #include <linux/slab.h>
  13 #include <linux/list.h>
  14 #include <linux/if_ether.h>
  15 #include <linux/ieee80211.h>
  16 #include <linux/nl80211.h>
  17 #include <linux/rtnetlink.h>
  18 #include <linux/netlink.h>
  19 #include <linux/etherdevice.h>
  20 #include <net/net_namespace.h>
  21 #include <net/genetlink.h>
  22 #include <net/cfg80211.h>
  23 #include <net/sock.h>
  24 #include <net/inet_connection_sock.h>
  25 #include "core.h"
  26 #include "nl80211.h"
  27 #include "reg.h"
  28 #include "rdev-ops.h"
  29
  30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  31                                    struct genl_info *info,
  32                                    struct cfg80211_crypto_settings *settings,
  33                                    int cipher_limit);
  34
  35 /* the netlink family */
  36 static struct genl_family nl80211_fam;
  37
  38 /* multicast groups */
  39 enum nl80211_multicast_groups {
  40         NL80211_MCGRP_CONFIG,
  41         NL80211_MCGRP_SCAN,
  42         NL80211_MCGRP_REGULATORY,
  43         NL80211_MCGRP_MLME,
  44         NL80211_MCGRP_VENDOR,
  45         NL80211_MCGRP_NAN,
  46         NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
  47 };
  48
  49 static const struct genl_multicast_group nl80211_mcgrps[] = {
  50         [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
  51         [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
  52         [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
  53         [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
  54         [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
  55         [NL80211_MCGRP_NAN] = { .name = NL80211_MULTICAST_GROUP_NAN },
  56 #ifdef CONFIG_NL80211_TESTMODE
  57         [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
  58 #endif
  59 };
  60
  61 /* returns ERR_PTR values */
  62 static struct wireless_dev *
  63 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  64 {
  65         struct cfg80211_registered_device *rdev;
  66         struct wireless_dev *result = NULL;
  67         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  68         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  69         u64 wdev_id;
  70         int wiphy_idx = -1;
  71         int ifidx = -1;
  72
  73         ASSERT_RTNL();
  74
  75         if (!have_ifidx && !have_wdev_id)
  76                 return ERR_PTR(-EINVAL);
  77
  78         if (have_ifidx)
  79                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  80         if (have_wdev_id) {
  81                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  82                 wiphy_idx = wdev_id >> 32;
  83         }
  84
  85         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  86                 struct wireless_dev *wdev;
  87
  88                 if (wiphy_net(&rdev->wiphy) != netns)
  89                         continue;
  90
  91                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  92                         continue;
  93
  94                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
  95                         if (have_ifidx && wdev->netdev &&
  96                             wdev->netdev->ifindex == ifidx) {
  97                                 result = wdev;
  98                                 break;
  99                         }
 100                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
 101                                 result = wdev;
 102                                 break;
 103                         }
 104                 }
 105
 106                 if (result)
 107                         break;
 108         }
 109
 110         if (result)
 111                 return result;
 112         return ERR_PTR(-ENODEV);
 113 }
 114
 115 static struct cfg80211_registered_device *
 116 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 117 {
 118         struct cfg80211_registered_device *rdev = NULL, *tmp;
 119         struct net_device *netdev;
 120
 121         ASSERT_RTNL();
 122
 123         if (!attrs[NL80211_ATTR_WIPHY] &&
 124             !attrs[NL80211_ATTR_IFINDEX] &&
 125             !attrs[NL80211_ATTR_WDEV])
 126                 return ERR_PTR(-EINVAL);
 127
 128         if (attrs[NL80211_ATTR_WIPHY])
 129                 rdev = cfg80211_rdev_by_wiphy_idx(
 130                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 131
 132         if (attrs[NL80211_ATTR_WDEV]) {
 133                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 134                 struct wireless_dev *wdev;
 135                 bool found = false;
 136
 137                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 138                 if (tmp) {
 139                         /* make sure wdev exists */
 140                         list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
 141                                 if (wdev->identifier != (u32)wdev_id)
 142                                         continue;
 143                                 found = true;
 144                                 break;
 145                         }
 146
 147                         if (!found)
 148                                 tmp = NULL;
 149
 150                         if (rdev && tmp != rdev)
 151                                 return ERR_PTR(-EINVAL);
 152                         rdev = tmp;
 153                 }
 154         }
 155
 156         if (attrs[NL80211_ATTR_IFINDEX]) {
 157                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 158
 159                 netdev = __dev_get_by_index(netns, ifindex);
 160                 if (netdev) {
 161                         if (netdev->ieee80211_ptr)
 162                                 tmp = wiphy_to_rdev(
 163                                         netdev->ieee80211_ptr->wiphy);
 164                         else
 165                                 tmp = NULL;
 166
 167                         /* not wireless device -- return error */
 168                         if (!tmp)
 169                                 return ERR_PTR(-EINVAL);
 170
 171                         /* mismatch -- return error */
 172                         if (rdev && tmp != rdev)
 173                                 return ERR_PTR(-EINVAL);
 174
 175                         rdev = tmp;
 176                 }
 177         }
 178
 179         if (!rdev)
 180                 return ERR_PTR(-ENODEV);
 181
 182         if (netns != wiphy_net(&rdev->wiphy))
 183                 return ERR_PTR(-ENODEV);
 184
 185         return rdev;
 186 }
 187
 188 /*
 189  * This function returns a pointer to the driver
 190  * that the genl_info item that is passed refers to.
 191  *
 192  * The result of this can be a PTR_ERR and hence must
 193  * be checked with IS_ERR() for errors.
 194  */
 195 static struct cfg80211_registered_device *
 196 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 197 {
 198         return __cfg80211_rdev_from_attrs(netns, info->attrs);
 199 }
 200
 201 /* policy for the attributes */
 202 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 203         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 204         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 205                                       .len = 20-1 },
 206         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 207
 208         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 209         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 210         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 211         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 212         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 213
 214         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 215         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 216         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 217         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 218         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 219         [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
 220
 221         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 222         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 223         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 224
 225         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 226         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 227
 228         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 229         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 230                                     .len = WLAN_MAX_KEY_LEN },
 231         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 232         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 233         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 234         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 235         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 236
 237         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 238         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 239         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 240                                        .len = IEEE80211_MAX_DATA_LEN },
 241         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 242                                        .len = IEEE80211_MAX_DATA_LEN },
 243         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 244         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 245         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 246         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 247                                                .len = NL80211_MAX_SUPP_RATES },
 248         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 249         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 250         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 251         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 252                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 253         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 256         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 257
 258         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 259         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 261         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 262                                            .len = NL80211_MAX_SUPP_RATES },
 263         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 264
 265         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 266         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 267
 268         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 269
 270         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 271         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 272                               .len = IEEE80211_MAX_DATA_LEN },
 273         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 274         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 277                                 .len = IEEE80211_MAX_SSID_LEN },
 278         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 279         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 280         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 281         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 282         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 283         [NL80211_ATTR_STA_FLAGS2] = {
 284                 .len = sizeof(struct nl80211_sta_flag_update),
 285         },
 286         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 287         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 288         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 289         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 290         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 291         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 292         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 293         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 294         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 295                                  .len = WLAN_PMKID_LEN },
 296         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 297         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 298         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 299         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 300                                  .len = IEEE80211_MAX_DATA_LEN },
 301         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 302         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 303         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 304         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 305         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 306         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 307         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 308         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 309         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 310         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 311         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 312         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 313         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 314         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 315         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 316         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 317         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 319         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 320         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 321                                          .len = IEEE80211_MAX_DATA_LEN },
 322         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 323                                          .len = IEEE80211_MAX_DATA_LEN },
 324         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 325         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 326         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 327         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 328         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 329         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 330         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
 333         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 334         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 335                                       .len = IEEE80211_MAX_DATA_LEN },
 336         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 337         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 338         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 339                 .len = NL80211_HT_CAPABILITY_LEN
 340         },
 341         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 342         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 343         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 344         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 345         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 346         [NL80211_ATTR_AUTH_DATA] = { .type = NLA_BINARY, },
 347         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 348         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 349         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 350         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 351         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 352         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 353         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 354         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 355         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 356         [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
 357         [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
 358                 .len = NL80211_VHT_CAPABILITY_LEN,
 359         },
 360         [NL80211_ATTR_MDID] = { .type = NLA_U16 },
 361         [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
 362                                   .len = IEEE80211_MAX_DATA_LEN },
 363         [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 },
 364         [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
 365         [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
 366         [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
 367         [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY },
 368         [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY },
 369         [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
 370         [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
 371         [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
 372         [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
 373         [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
 374         [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
 375         [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
 376         [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY,
 377                                    .len = IEEE80211_QOS_MAP_LEN_MAX },
 378         [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },
 379         [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
 380         [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
 381         [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
 382         [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
 383         [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
 384         [NL80211_ATTR_TSID] = { .type = NLA_U8 },
 385         [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 },
 386         [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
 387         [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
 388         [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN },
 389         [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
 390         [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
 391         [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
 392         [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
 393         [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
 394         [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
 395         [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 },
 396         [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
 397                 .len = VHT_MUMIMO_GROUPS_DATA_LEN
 398         },
 399         [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN },
 400         [NL80211_ATTR_NAN_MASTER_PREF] = { .type = NLA_U8 },
 401         [NL80211_ATTR_BANDS] = { .type = NLA_U32 },
 402         [NL80211_ATTR_NAN_FUNC] = { .type = NLA_NESTED },
 403         [NL80211_ATTR_FILS_KEK] = { .type = NLA_BINARY,
 404                                     .len = FILS_MAX_KEK_LEN },
 405         [NL80211_ATTR_FILS_NONCES] = { .len = 2 * FILS_NONCE_LEN },
 406         [NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED] = { .type = NLA_FLAG, },
 407         [NL80211_ATTR_BSSID] = { .len = ETH_ALEN },
 408         [NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] = { .type = NLA_S8 },
 409         [NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST] = {
 410                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 411         },
 412         [NL80211_ATTR_TIMEOUT_REASON] = { .type = NLA_U32 },
 413         [NL80211_ATTR_FILS_ERP_USERNAME] = { .type = NLA_BINARY,
 414                                              .len = FILS_ERP_MAX_USERNAME_LEN },
 415         [NL80211_ATTR_FILS_ERP_REALM] = { .type = NLA_BINARY,
 416                                           .len = FILS_ERP_MAX_REALM_LEN },
 417         [NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] = { .type = NLA_U16 },
 418         [NL80211_ATTR_FILS_ERP_RRK] = { .type = NLA_BINARY,
 419                                         .len = FILS_ERP_MAX_RRK_LEN },
 420         [NL80211_ATTR_FILS_CACHE_ID] = { .len = 2 },
 421         [NL80211_ATTR_PMK] = { .type = NLA_BINARY, .len = PMK_MAX_LEN },
 422         [NL80211_ATTR_SCHED_SCAN_MULTI] = { .type = NLA_FLAG },
 423 };
 424
 425 /* policy for the key attributes */
 426 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 427         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 428         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 429         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 430         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 431         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 432         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 433         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 434         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 435 };
 436
 437 /* policy for the key default flags */
 438 static const struct nla_policy
 439 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 440         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 441         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 442 };
 443
 444 #ifdef CONFIG_PM
 445 /* policy for WoWLAN attributes */
 446 static const struct nla_policy
 447 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 448         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 449         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 450         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 451         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 452         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 453         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 454         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 455         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 456         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 457         [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
 458 };
 459
 460 static const struct nla_policy
 461 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 462         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 463         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 464         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 465         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 466         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 467         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 468         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 469                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 470         },
 471         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 472                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 473         },
 474         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 475         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 476         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 477 };
 478 #endif /* CONFIG_PM */
 479
 480 /* policy for coalesce rule attributes */
 481 static const struct nla_policy
 482 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
 483         [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
 484         [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 },
 485         [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
 486 };
 487
 488 /* policy for GTK rekey offload attributes */
 489 static const struct nla_policy
 490 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 491         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 492         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 493         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 494 };
 495
 496 static const struct nla_policy
 497 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 498         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 499                                                  .len = IEEE80211_MAX_SSID_LEN },
 500         [NL80211_SCHED_SCAN_MATCH_ATTR_BSSID] = { .len = ETH_ALEN },
 501         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 502 };
 503
 504 static const struct nla_policy
 505 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
 506         [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
 507         [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
 508 };
 509
 510 static const struct nla_policy
 511 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
 512         [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
 513         [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
 514         [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
 515                 .len = sizeof(struct nl80211_bss_select_rssi_adjust)
 516         },
 517 };
 518
 519 /* policy for NAN function attributes */
 520 static const struct nla_policy
 521 nl80211_nan_func_policy[NL80211_NAN_FUNC_ATTR_MAX + 1] = {
 522         [NL80211_NAN_FUNC_TYPE] = { .type = NLA_U8 },
 523         [NL80211_NAN_FUNC_SERVICE_ID] = { .type = NLA_BINARY,
 524                                     .len = NL80211_NAN_FUNC_SERVICE_ID_LEN },
 525         [NL80211_NAN_FUNC_PUBLISH_TYPE] = { .type = NLA_U8 },
 526         [NL80211_NAN_FUNC_PUBLISH_BCAST] = { .type = NLA_FLAG },
 527         [NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE] = { .type = NLA_FLAG },
 528         [NL80211_NAN_FUNC_FOLLOW_UP_ID] = { .type = NLA_U8 },
 529         [NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] = { .type = NLA_U8 },
 530         [NL80211_NAN_FUNC_FOLLOW_UP_DEST] = { .len = ETH_ALEN },
 531         [NL80211_NAN_FUNC_CLOSE_RANGE] = { .type = NLA_FLAG },
 532         [NL80211_NAN_FUNC_TTL] = { .type = NLA_U32 },
 533         [NL80211_NAN_FUNC_SERVICE_INFO] = { .type = NLA_BINARY,
 534                         .len = NL80211_NAN_FUNC_SERVICE_SPEC_INFO_MAX_LEN },
 535         [NL80211_NAN_FUNC_SRF] = { .type = NLA_NESTED },
 536         [NL80211_NAN_FUNC_RX_MATCH_FILTER] = { .type = NLA_NESTED },
 537         [NL80211_NAN_FUNC_TX_MATCH_FILTER] = { .type = NLA_NESTED },
 538         [NL80211_NAN_FUNC_INSTANCE_ID] = { .type = NLA_U8 },
 539         [NL80211_NAN_FUNC_TERM_REASON] = { .type = NLA_U8 },
 540 };
 541
 542 /* policy for Service Response Filter attributes */
 543 static const struct nla_policy
 544 nl80211_nan_srf_policy[NL80211_NAN_SRF_ATTR_MAX + 1] = {
 545         [NL80211_NAN_SRF_INCLUDE] = { .type = NLA_FLAG },
 546         [NL80211_NAN_SRF_BF] = { .type = NLA_BINARY,
 547                                  .len =  NL80211_NAN_FUNC_SRF_MAX_LEN },
 548         [NL80211_NAN_SRF_BF_IDX] = { .type = NLA_U8 },
 549         [NL80211_NAN_SRF_MAC_ADDRS] = { .type = NLA_NESTED },
 550 };
 551
 552 static int nl80211_prepare_wdev_dump(struct sk_buff *skb,
 553                                      struct netlink_callback *cb,
 554                                      struct cfg80211_registered_device **rdev,
 555                                      struct wireless_dev **wdev)
 556 {
 557         int err;
 558
 559         if (!cb->args[0]) {
 560                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 561                                   genl_family_attrbuf(&nl80211_fam),
 562                                   nl80211_fam.maxattr, nl80211_policy, NULL);
 563                 if (err)
 564                         return err;
 565
 566                 *wdev = __cfg80211_wdev_from_attrs(
 567                                         sock_net(skb->sk),
 568                                         genl_family_attrbuf(&nl80211_fam));
 569                 if (IS_ERR(*wdev))
 570                         return PTR_ERR(*wdev);
 571                 *rdev = wiphy_to_rdev((*wdev)->wiphy);
 572                 /* 0 is the first index - add 1 to parse only once */
 573                 cb->args[0] = (*rdev)->wiphy_idx + 1;
 574                 cb->args[1] = (*wdev)->identifier;
 575         } else {
 576                 /* subtract the 1 again here */
 577                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
 578                 struct wireless_dev *tmp;
 579
 580                 if (!wiphy)
 581                         return -ENODEV;
 582                 *rdev = wiphy_to_rdev(wiphy);
 583                 *wdev = NULL;
 584
 585                 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
 586                         if (tmp->identifier == cb->args[1]) {
 587                                 *wdev = tmp;
 588                                 break;
 589                         }
 590                 }
 591
 592                 if (!*wdev)
 593                         return -ENODEV;
 594         }
 595
 596         return 0;
 597 }
 598
 599 /* IE validation */
 600 static bool is_valid_ie_attr(const struct nlattr *attr)
 601 {
 602         const u8 *pos;
 603         int len;
 604
 605         if (!attr)
 606                 return true;
 607
 608         pos = nla_data(attr);
 609         len = nla_len(attr);
 610
 611         while (len) {
 612                 u8 elemlen;
 613
 614                 if (len < 2)
 615                         return false;
 616                 len -= 2;
 617
 618                 elemlen = pos[1];
 619                 if (elemlen > len)
 620                         return false;
 621
 622                 len -= elemlen;
 623                 pos += 2 + elemlen;
 624         }
 625
 626         return true;
 627 }
 628
 629 /* message building helper */
 630 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 631                                    int flags, u8 cmd)
 632 {
 633         /* since there is no private header just add the generic one */
 634         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 635 }
 636
 637 static int nl80211_msg_put_channel(struct sk_buff *msg,
 638                                    struct ieee80211_channel *chan,
 639                                    bool large)
 640 {
 641         /* Some channels must be completely excluded from the
 642          * list to protect old user-space tools from breaking
 643          */
 644         if (!large && chan->flags &
 645             (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
 646                 return 0;
 647
 648         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 649                         chan->center_freq))
 650                 goto nla_put_failure;
 651
 652         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 653             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 654                 goto nla_put_failure;
 655         if (chan->flags & IEEE80211_CHAN_NO_IR) {
 656                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
 657                         goto nla_put_failure;
 658                 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
 659                         goto nla_put_failure;
 660         }
 661         if (chan->flags & IEEE80211_CHAN_RADAR) {
 662                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 663                         goto nla_put_failure;
 664                 if (large) {
 665                         u32 time;
 666
 667                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 668
 669                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 670                                         chan->dfs_state))
 671                                 goto nla_put_failure;
 672                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 673                                         time))
 674                                 goto nla_put_failure;
 675                         if (nla_put_u32(msg,
 676                                         NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
 677                                         chan->dfs_cac_ms))
 678                                 goto nla_put_failure;
 679                 }
 680         }
 681
 682         if (large) {
 683                 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
 684                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
 685                         goto nla_put_failure;
 686                 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
 687                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
 688                         goto nla_put_failure;
 689                 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
 690                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
 691                         goto nla_put_failure;
 692                 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
 693                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
 694                         goto nla_put_failure;
 695                 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
 696                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
 697                         goto nla_put_failure;
 698                 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
 699                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
 700                         goto nla_put_failure;
 701                 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
 702                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
 703                         goto nla_put_failure;
 704                 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
 705                     nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
 706                         goto nla_put_failure;
 707         }
 708
 709         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 710                         DBM_TO_MBM(chan->max_power)))
 711                 goto nla_put_failure;
 712
 713         return 0;
 714
 715  nla_put_failure:
 716         return -ENOBUFS;
 717 }
 718
 719 /* netlink command implementations */
 720
 721 struct key_parse {
 722         struct key_params p;
 723         int idx;
 724         int type;
 725         bool def, defmgmt;
 726         bool def_uni, def_multi;
 727 };
 728
 729 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 730 {
 731         struct nlattr *tb[NL80211_KEY_MAX + 1];
 732         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 733                                    nl80211_key_policy, NULL);
 734         if (err)
 735                 return err;
 736
 737         k->def = !!tb[NL80211_KEY_DEFAULT];
 738         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 739
 740         if (k->def) {
 741                 k->def_uni = true;
 742                 k->def_multi = true;
 743         }
 744         if (k->defmgmt)
 745                 k->def_multi = true;
 746
 747         if (tb[NL80211_KEY_IDX])
 748                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 749
 750         if (tb[NL80211_KEY_DATA]) {
 751                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 752                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 753         }
 754
 755         if (tb[NL80211_KEY_SEQ]) {
 756                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 757                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 758         }
 759
 760         if (tb[NL80211_KEY_CIPHER])
 761                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 762
 763         if (tb[NL80211_KEY_TYPE]) {
 764                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 765                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 766                         return -EINVAL;
 767         }
 768
 769         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 770                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 771
 772                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 773                                        tb[NL80211_KEY_DEFAULT_TYPES],
 774                                        nl80211_key_default_policy, NULL);
 775                 if (err)
 776                         return err;
 777
 778                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 779                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 780         }
 781
 782         return 0;
 783 }
 784
 785 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 786 {
 787         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 788                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 789                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 790         }
 791
 792         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 793                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 794                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 795         }
 796
 797         if (info->attrs[NL80211_ATTR_KEY_IDX])
 798                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 799
 800         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 801                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 802
 803         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 804         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 805
 806         if (k->def) {
 807                 k->def_uni = true;
 808                 k->def_multi = true;
 809         }
 810         if (k->defmgmt)
 811                 k->def_multi = true;
 812
 813         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 814                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 815                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 816                         return -EINVAL;
 817         }
 818
 819         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 820                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 821                 int err = nla_parse_nested(kdt,
 822                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 823                                            info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 824                                            nl80211_key_default_policy,
 825                                            info->extack);
 826                 if (err)
 827                         return err;
 828
 829                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 830                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 831         }
 832
 833         return 0;
 834 }
 835
 836 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 837 {
 838         int err;
 839
 840         memset(k, 0, sizeof(*k));
 841         k->idx = -1;
 842         k->type = -1;
 843
 844         if (info->attrs[NL80211_ATTR_KEY])
 845                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 846         else
 847                 err = nl80211_parse_key_old(info, k);
 848
 849         if (err)
 850                 return err;
 851
 852         if (k->def && k->defmgmt)
 853                 return -EINVAL;
 854
 855         if (k->defmgmt) {
 856                 if (k->def_uni || !k->def_multi)
 857                         return -EINVAL;
 858         }
 859
 860         if (k->idx != -1) {
 861                 if (k->defmgmt) {
 862                         if (k->idx < 4 || k->idx > 5)
 863                                 return -EINVAL;
 864                 } else if (k->def) {
 865                         if (k->idx < 0 || k->idx > 3)
 866                                 return -EINVAL;
 867                 } else {
 868                         if (k->idx < 0 || k->idx > 5)
 869                                 return -EINVAL;
 870                 }
 871         }
 872
 873         return 0;
 874 }
 875
 876 static struct cfg80211_cached_keys *
 877 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 878                        struct nlattr *keys, bool *no_ht)
 879 {
 880         struct key_parse parse;
 881         struct nlattr *key;
 882         struct cfg80211_cached_keys *result;
 883         int rem, err, def = 0;
 884         bool have_key = false;
 885
 886         nla_for_each_nested(key, keys, rem) {
 887                 have_key = true;
 888                 break;
 889         }
 890
 891         if (!have_key)
 892                 return NULL;
 893
 894         result = kzalloc(sizeof(*result), GFP_KERNEL);
 895         if (!result)
 896                 return ERR_PTR(-ENOMEM);
 897
 898         result->def = -1;
 899
 900         nla_for_each_nested(key, keys, rem) {
 901                 memset(&parse, 0, sizeof(parse));
 902                 parse.idx = -1;
 903
 904                 err = nl80211_parse_key_new(key, &parse);
 905                 if (err)
 906                         goto error;
 907                 err = -EINVAL;
 908                 if (!parse.p.key)
 909                         goto error;
 910                 if (parse.idx < 0 || parse.idx > 3)
 911                         goto error;
 912                 if (parse.def) {
 913                         if (def)
 914                                 goto error;
 915                         def = 1;
 916                         result->def = parse.idx;
 917                         if (!parse.def_uni || !parse.def_multi)
 918                                 goto error;
 919                 } else if (parse.defmgmt)
 920                         goto error;
 921                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 922                                                      parse.idx, false, NULL);
 923                 if (err)
 924                         goto error;
 925                 if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
 926                     parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
 927                         err = -EINVAL;
 928                         goto error;
 929                 }
 930                 result->params[parse.idx].cipher = parse.p.cipher;
 931                 result->params[parse.idx].key_len = parse.p.key_len;
 932                 result->params[parse.idx].key = result->data[parse.idx];
 933                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 934
 935                 /* must be WEP key if we got here */
 936                 if (no_ht)
 937                         *no_ht = true;
 938         }
 939
 940         if (result->def < 0) {
 941                 err = -EINVAL;
 942                 goto error;
 943         }
 944
 945         return result;
 946  error:
 947         kfree(result);
 948         return ERR_PTR(err);
 949 }
 950
 951 static int nl80211_key_allowed(struct wireless_dev *wdev)
 952 {
 953         ASSERT_WDEV_LOCK(wdev);
 954
 955         switch (wdev->iftype) {
 956         case NL80211_IFTYPE_AP:
 957         case NL80211_IFTYPE_AP_VLAN:
 958         case NL80211_IFTYPE_P2P_GO:
 959         case NL80211_IFTYPE_MESH_POINT:
 960                 break;
 961         case NL80211_IFTYPE_ADHOC:
 962         case NL80211_IFTYPE_STATION:
 963         case NL80211_IFTYPE_P2P_CLIENT:
 964                 if (!wdev->current_bss)
 965                         return -ENOLINK;
 966                 break;
 967         case NL80211_IFTYPE_UNSPECIFIED:
 968         case NL80211_IFTYPE_OCB:
 969         case NL80211_IFTYPE_MONITOR:
 970         case NL80211_IFTYPE_NAN:
 971         case NL80211_IFTYPE_P2P_DEVICE:
 972         case NL80211_IFTYPE_WDS:
 973         case NUM_NL80211_IFTYPES:
 974                 return -EINVAL;
 975         }
 976
 977         return 0;
 978 }
 979
 980 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
 981                                                         struct nlattr *tb)
 982 {
 983         struct ieee80211_channel *chan;
 984
 985         if (tb == NULL)
 986                 return NULL;
 987         chan = ieee80211_get_channel(wiphy, nla_get_u32(tb));
 988         if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 989                 return NULL;
 990         return chan;
 991 }
 992
 993 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 994 {
 995         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 996         int i;
 997
 998         if (!nl_modes)
 999                 goto nla_put_failure;
1000
1001         i = 0;
1002         while (ifmodes) {
1003                 if ((ifmodes & 1) && nla_put_flag(msg, i))
1004                         goto nla_put_failure;
1005                 ifmodes >>= 1;
1006                 i++;
1007         }
1008
1009         nla_nest_end(msg, nl_modes);
1010         return 0;
1011
1012 nla_put_failure:
1013         return -ENOBUFS;
1014 }
1015
1016 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
1017                                           struct sk_buff *msg,
1018                                           bool large)
1019 {
1020         struct nlattr *nl_combis;
1021         int i, j;
1022
1023         nl_combis = nla_nest_start(msg,
1024                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
1025         if (!nl_combis)
1026                 goto nla_put_failure;
1027
1028         for (i = 0; i < wiphy->n_iface_combinations; i++) {
1029                 const struct ieee80211_iface_combination *c;
1030                 struct nlattr *nl_combi, *nl_limits;
1031
1032                 c = &wiphy->iface_combinations[i];
1033
1034                 nl_combi = nla_nest_start(msg, i + 1);
1035                 if (!nl_combi)
1036                         goto nla_put_failure;
1037
1038                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
1039                 if (!nl_limits)
1040                         goto nla_put_failure;
1041
1042                 for (j = 0; j < c->n_limits; j++) {
1043                         struct nlattr *nl_limit;
1044
1045                         nl_limit = nla_nest_start(msg, j + 1);
1046                         if (!nl_limit)
1047                                 goto nla_put_failure;
1048                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
1049                                         c->limits[j].max))
1050                                 goto nla_put_failure;
1051                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
1052                                                 c->limits[j].types))
1053                                 goto nla_put_failure;
1054                         nla_nest_end(msg, nl_limit);
1055                 }
1056
1057                 nla_nest_end(msg, nl_limits);
1058
1059                 if (c->beacon_int_infra_match &&
1060                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
1061                         goto nla_put_failure;
1062                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
1063                                 c->num_different_channels) ||
1064                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
1065                                 c->max_interfaces))
1066                         goto nla_put_failure;
1067                 if (large &&
1068                     (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
1069                                 c->radar_detect_widths) ||
1070                      nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
1071                                 c->radar_detect_regions)))
1072                         goto nla_put_failure;
1073                 if (c->beacon_int_min_gcd &&
1074                     nla_put_u32(msg, NL80211_IFACE_COMB_BI_MIN_GCD,
1075                                 c->beacon_int_min_gcd))
1076                         goto nla_put_failure;
1077
1078                 nla_nest_end(msg, nl_combi);
1079         }
1080
1081         nla_nest_end(msg, nl_combis);
1082
1083         return 0;
1084 nla_put_failure:
1085         return -ENOBUFS;
1086 }
1087
1088 #ifdef CONFIG_PM
1089 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
1090                                         struct sk_buff *msg)
1091 {
1092         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
1093         struct nlattr *nl_tcp;
1094
1095         if (!tcp)
1096                 return 0;
1097
1098         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
1099         if (!nl_tcp)
1100                 return -ENOBUFS;
1101
1102         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1103                         tcp->data_payload_max))
1104                 return -ENOBUFS;
1105
1106         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
1107                         tcp->data_payload_max))
1108                 return -ENOBUFS;
1109
1110         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
1111                 return -ENOBUFS;
1112
1113         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
1114                                 sizeof(*tcp->tok), tcp->tok))
1115                 return -ENOBUFS;
1116
1117         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
1118                         tcp->data_interval_max))
1119                 return -ENOBUFS;
1120
1121         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
1122                         tcp->wake_payload_max))
1123                 return -ENOBUFS;
1124
1125         nla_nest_end(msg, nl_tcp);
1126         return 0;
1127 }
1128
1129 static int nl80211_send_wowlan(struct sk_buff *msg,
1130                                struct cfg80211_registered_device *rdev,
1131                                bool large)
1132 {
1133         struct nlattr *nl_wowlan;
1134
1135         if (!rdev->wiphy.wowlan)
1136                 return 0;
1137
1138         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1139         if (!nl_wowlan)
1140                 return -ENOBUFS;
1141
1142         if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
1143              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1144             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
1145              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1146             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1147              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1148             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1149              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1150             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1151              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1152             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1153              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1154             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1155              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1156             ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1157              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1158                 return -ENOBUFS;
1159
1160         if (rdev->wiphy.wowlan->n_patterns) {
1161                 struct nl80211_pattern_support pat = {
1162                         .max_patterns = rdev->wiphy.wowlan->n_patterns,
1163                         .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
1164                         .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
1165                         .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
1166                 };
1167
1168                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1169                             sizeof(pat), &pat))
1170                         return -ENOBUFS;
1171         }
1172
1173         if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
1174             nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
1175                         rdev->wiphy.wowlan->max_nd_match_sets))
1176                 return -ENOBUFS;
1177
1178         if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
1179                 return -ENOBUFS;
1180
1181         nla_nest_end(msg, nl_wowlan);
1182
1183         return 0;
1184 }
1185 #endif
1186
1187 static int nl80211_send_coalesce(struct sk_buff *msg,
1188                                  struct cfg80211_registered_device *rdev)
1189 {
1190         struct nl80211_coalesce_rule_support rule;
1191
1192         if (!rdev->wiphy.coalesce)
1193                 return 0;
1194
1195         rule.max_rules = rdev->wiphy.coalesce->n_rules;
1196         rule.max_delay = rdev->wiphy.coalesce->max_delay;
1197         rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
1198         rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
1199         rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
1200         rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;
1201
1202         if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
1203                 return -ENOBUFS;
1204
1205         return 0;
1206 }
1207
1208 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1209                                       struct ieee80211_supported_band *sband)
1210 {
1211         struct nlattr *nl_rates, *nl_rate;
1212         struct ieee80211_rate *rate;
1213         int i;
1214
1215         /* add HT info */
1216         if (sband->ht_cap.ht_supported &&
1217             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1218                      sizeof(sband->ht_cap.mcs),
1219                      &sband->ht_cap.mcs) ||
1220              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1221                          sband->ht_cap.cap) ||
1222              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1223                         sband->ht_cap.ampdu_factor) ||
1224              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1225                         sband->ht_cap.ampdu_density)))
1226                 return -ENOBUFS;
1227
1228         /* add VHT info */
1229         if (sband->vht_cap.vht_supported &&
1230             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1231                      sizeof(sband->vht_cap.vht_mcs),
1232                      &sband->vht_cap.vht_mcs) ||
1233              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1234                          sband->vht_cap.cap)))
1235                 return -ENOBUFS;
1236
1237         /* add bitrates */
1238         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1239         if (!nl_rates)
1240                 return -ENOBUFS;
1241
1242         for (i = 0; i < sband->n_bitrates; i++) {
1243                 nl_rate = nla_nest_start(msg, i);
1244                 if (!nl_rate)
1245                         return -ENOBUFS;
1246
1247                 rate = &sband->bitrates[i];
1248                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1249                                 rate->bitrate))
1250                         return -ENOBUFS;
1251                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1252                     nla_put_flag(msg,
1253                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1254                         return -ENOBUFS;
1255
1256                 nla_nest_end(msg, nl_rate);
1257         }
1258
1259         nla_nest_end(msg, nl_rates);
1260
1261         return 0;
1262 }
1263
1264 static int
1265 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1266                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1267 {
1268         u16 stypes;
1269         struct nlattr *nl_ftypes, *nl_ifs;
1270         enum nl80211_iftype ift;
1271         int i;
1272
1273         if (!mgmt_stypes)
1274                 return 0;
1275
1276         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1277         if (!nl_ifs)
1278                 return -ENOBUFS;
1279
1280         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1281                 nl_ftypes = nla_nest_start(msg, ift);
1282                 if (!nl_ftypes)
1283                         return -ENOBUFS;
1284                 i = 0;
1285                 stypes = mgmt_stypes[ift].tx;
1286                 while (stypes) {
1287                         if ((stypes & 1) &&
1288                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1289                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1290                                 return -ENOBUFS;
1291                         stypes >>= 1;
1292                         i++;
1293                 }
1294                 nla_nest_end(msg, nl_ftypes);
1295         }
1296
1297         nla_nest_end(msg, nl_ifs);
1298
1299         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1300         if (!nl_ifs)
1301                 return -ENOBUFS;
1302
1303         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1304                 nl_ftypes = nla_nest_start(msg, ift);
1305                 if (!nl_ftypes)
1306                         return -ENOBUFS;
1307                 i = 0;
1308                 stypes = mgmt_stypes[ift].rx;
1309                 while (stypes) {
1310                         if ((stypes & 1) &&
1311                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1312                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1313                                 return -ENOBUFS;
1314                         stypes >>= 1;
1315                         i++;
1316                 }
1317                 nla_nest_end(msg, nl_ftypes);
1318         }
1319         nla_nest_end(msg, nl_ifs);
1320
1321         return 0;
1322 }
1323
1324 #define CMD(op, n)                                                      \
1325          do {                                                           \
1326                 if (rdev->ops->op) {                                    \
1327                         i++;                                            \
1328                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n))     \
1329                                 goto nla_put_failure;                   \
1330                 }                                                       \
1331         } while (0)
1332
1333 static int nl80211_add_commands_unsplit(struct cfg80211_registered_device *rdev,
1334                                         struct sk_buff *msg)
1335 {
1336         int i = 0;
1337
1338         /*
1339          * do *NOT* add anything into this function, new things need to be
1340          * advertised only to new versions of userspace that can deal with
1341          * the split (and they can't possibly care about new features...
1342          */
1343         CMD(add_virtual_intf, NEW_INTERFACE);
1344         CMD(change_virtual_intf, SET_INTERFACE);
1345         CMD(add_key, NEW_KEY);
1346         CMD(start_ap, START_AP);
1347         CMD(add_station, NEW_STATION);
1348         CMD(add_mpath, NEW_MPATH);
1349         CMD(update_mesh_config, SET_MESH_CONFIG);
1350         CMD(change_bss, SET_BSS);
1351         CMD(auth, AUTHENTICATE);
1352         CMD(assoc, ASSOCIATE);
1353         CMD(deauth, DEAUTHENTICATE);
1354         CMD(disassoc, DISASSOCIATE);
1355         CMD(join_ibss, JOIN_IBSS);
1356         CMD(join_mesh, JOIN_MESH);
1357         CMD(set_pmksa, SET_PMKSA);
1358         CMD(del_pmksa, DEL_PMKSA);
1359         CMD(flush_pmksa, FLUSH_PMKSA);
1360         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1361                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1362         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1363         CMD(mgmt_tx, FRAME);
1364         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1365         if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1366                 i++;
1367                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1368                         goto nla_put_failure;
1369         }
1370         if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
1371             rdev->ops->join_mesh) {
1372                 i++;
1373                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1374                         goto nla_put_failure;
1375         }
1376         CMD(set_wds_peer, SET_WDS_PEER);
1377         if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1378                 CMD(tdls_mgmt, TDLS_MGMT);
1379                 CMD(tdls_oper, TDLS_OPER);
1380         }
1381         if (rdev->wiphy.max_sched_scan_reqs)
1382                 CMD(sched_scan_start, START_SCHED_SCAN);
1383         CMD(probe_client, PROBE_CLIENT);
1384         CMD(set_noack_map, SET_NOACK_MAP);
1385         if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1386                 i++;
1387                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1388                         goto nla_put_failure;
1389         }
1390         CMD(start_p2p_device, START_P2P_DEVICE);
1391         CMD(set_mcast_rate, SET_MCAST_RATE);
1392 #ifdef CONFIG_NL80211_TESTMODE
1393         CMD(testmode_cmd, TESTMODE);
1394 #endif
1395
1396         if (rdev->ops->connect || rdev->ops->auth) {
1397                 i++;
1398                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1399                         goto nla_put_failure;
1400         }
1401
1402         if (rdev->ops->disconnect || rdev->ops->deauth) {
1403                 i++;
1404                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1405                         goto nla_put_failure;
1406         }
1407
1408         return i;
1409  nla_put_failure:
1410         return -ENOBUFS;
1411 }
1412
1413 struct nl80211_dump_wiphy_state {
1414         s64 filter_wiphy;
1415         long start;
1416         long split_start, band_start, chan_start, capa_start;
1417         bool split;
1418 };
1419
1420 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
1421                               enum nl80211_commands cmd,
1422                               struct sk_buff *msg, u32 portid, u32 seq,
1423                               int flags, struct nl80211_dump_wiphy_state *state)
1424 {
1425         void *hdr;
1426         struct nlattr *nl_bands, *nl_band;
1427         struct nlattr *nl_freqs, *nl_freq;
1428         struct nlattr *nl_cmds;
1429         enum nl80211_band band;
1430         struct ieee80211_channel *chan;
1431         int i;
1432         const struct ieee80211_txrx_stypes *mgmt_stypes =
1433                                 rdev->wiphy.mgmt_stypes;
1434         u32 features;
1435
1436         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
1437         if (!hdr)
1438                 return -ENOBUFS;
1439
1440         if (WARN_ON(!state))
1441                 return -EINVAL;
1442
1443         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1444             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1445                            wiphy_name(&rdev->wiphy)) ||
1446             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1447                         cfg80211_rdev_list_generation))
1448                 goto nla_put_failure;
1449
1450         if (cmd != NL80211_CMD_NEW_WIPHY)
1451                 goto finish;
1452
1453         switch (state->split_start) {
1454         case 0:
1455                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1456                                rdev->wiphy.retry_short) ||
1457                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1458                                rdev->wiphy.retry_long) ||
1459                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1460                                 rdev->wiphy.frag_threshold) ||
1461                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1462                                 rdev->wiphy.rts_threshold) ||
1463                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1464                                rdev->wiphy.coverage_class) ||
1465                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1466                                rdev->wiphy.max_scan_ssids) ||
1467                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1468                                rdev->wiphy.max_sched_scan_ssids) ||
1469                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1470                                 rdev->wiphy.max_scan_ie_len) ||
1471                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1472                                 rdev->wiphy.max_sched_scan_ie_len) ||
1473                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1474                                rdev->wiphy.max_match_sets) ||
1475                     nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
1476                                 rdev->wiphy.max_sched_scan_plans) ||
1477                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
1478                                 rdev->wiphy.max_sched_scan_plan_interval) ||
1479                     nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
1480                                 rdev->wiphy.max_sched_scan_plan_iterations))
1481                         goto nla_put_failure;
1482
1483                 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1484                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1485                         goto nla_put_failure;
1486                 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1487                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1488                         goto nla_put_failure;
1489                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1490                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1491                         goto nla_put_failure;
1492                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1493                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1494                         goto nla_put_failure;
1495                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1496                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1497                         goto nla_put_failure;
1498                 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1499                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1500                         goto nla_put_failure;
1501                 state->split_start++;
1502                 if (state->split)
1503                         break;
1504         case 1:
1505                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1506                             sizeof(u32) * rdev->wiphy.n_cipher_suites,
1507                             rdev->wiphy.cipher_suites))
1508                         goto nla_put_failure;
1509
1510                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1511                                rdev->wiphy.max_num_pmkids))
1512                         goto nla_put_failure;
1513
1514                 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1515                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1516                         goto nla_put_failure;
1517
1518                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1519                                 rdev->wiphy.available_antennas_tx) ||
1520                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1521                                 rdev->wiphy.available_antennas_rx))
1522                         goto nla_put_failure;
1523
1524                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1525                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1526                                 rdev->wiphy.probe_resp_offload))
1527                         goto nla_put_failure;
1528
1529                 if ((rdev->wiphy.available_antennas_tx ||
1530                      rdev->wiphy.available_antennas_rx) &&
1531                     rdev->ops->get_antenna) {
1532                         u32 tx_ant = 0, rx_ant = 0;
1533                         int res;
1534
1535                         res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
1536                         if (!res) {
1537                                 if (nla_put_u32(msg,
1538                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1539                                                 tx_ant) ||
1540                                     nla_put_u32(msg,
1541                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1542                                                 rx_ant))
1543                                         goto nla_put_failure;
1544                         }
1545                 }
1546
1547                 state->split_start++;
1548                 if (state->split)
1549                         break;
1550         case 2:
1551                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1552                                         rdev->wiphy.interface_modes))
1553                                 goto nla_put_failure;
1554                 state->split_start++;
1555                 if (state->split)
1556                         break;
1557         case 3:
1558                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1559                 if (!nl_bands)
1560                         goto nla_put_failure;
1561
1562                 for (band = state->band_start;
1563                      band < NUM_NL80211_BANDS; band++) {
1564                         struct ieee80211_supported_band *sband;
1565
1566                         sband = rdev->wiphy.bands[band];
1567
1568                         if (!sband)
1569                                 continue;
1570
1571                         nl_band = nla_nest_start(msg, band);
1572                         if (!nl_band)
1573                                 goto nla_put_failure;
1574
1575                         switch (state->chan_start) {
1576                         case 0:
1577                                 if (nl80211_send_band_rateinfo(msg, sband))
1578                                         goto nla_put_failure;
1579                                 state->chan_start++;
1580                                 if (state->split)
1581                                         break;
1582                         default:
1583                                 /* add frequencies */
1584                                 nl_freqs = nla_nest_start(
1585                                         msg, NL80211_BAND_ATTR_FREQS);
1586                                 if (!nl_freqs)
1587                                         goto nla_put_failure;
1588
1589                                 for (i = state->chan_start - 1;
1590                                      i < sband->n_channels;
1591                                      i++) {
1592                                         nl_freq = nla_nest_start(msg, i);
1593                                         if (!nl_freq)
1594                                                 goto nla_put_failure;
1595
1596                                         chan = &sband->channels[i];
1597
1598                                         if (nl80211_msg_put_channel(
1599                                                         msg, chan,
1600                                                         state->split))
1601                                                 goto nla_put_failure;
1602
1603                                         nla_nest_end(msg, nl_freq);
1604                                         if (state->split)
1605                                                 break;
1606                                 }
1607                                 if (i < sband->n_channels)
1608                                         state->chan_start = i + 2;
1609                                 else
1610                                         state->chan_start = 0;
1611                                 nla_nest_end(msg, nl_freqs);
1612                         }
1613
1614                         nla_nest_end(msg, nl_band);
1615
1616                         if (state->split) {
1617                                 /* start again here */
1618                                 if (state->chan_start)
1619                                         band--;
1620                                 break;
1621                         }
1622                 }
1623                 nla_nest_end(msg, nl_bands);
1624
1625                 if (band < NUM_NL80211_BANDS)
1626                         state->band_start = band + 1;
1627                 else
1628                         state->band_start = 0;
1629
1630                 /* if bands & channels are done, continue outside */
1631                 if (state->band_start == 0 && state->chan_start == 0)
1632                         state->split_start++;
1633                 if (state->split)
1634                         break;
1635         case 4:
1636                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1637                 if (!nl_cmds)
1638                         goto nla_put_failure;
1639
1640                 i = nl80211_add_commands_unsplit(rdev, msg);
1641                 if (i < 0)
1642                         goto nla_put_failure;
1643                 if (state->split) {
1644                         CMD(crit_proto_start, CRIT_PROTOCOL_START);
1645                         CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
1646                         if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
1647                                 CMD(channel_switch, CHANNEL_SWITCH);
1648                         CMD(set_qos_map, SET_QOS_MAP);
1649                         if (rdev->wiphy.features &
1650                                         NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
1651                                 CMD(add_tx_ts, ADD_TX_TS);
1652                         CMD(set_multicast_to_unicast, SET_MULTICAST_TO_UNICAST);
1653                         CMD(update_connect_params, UPDATE_CONNECT_PARAMS);
1654                 }
1655 #undef CMD
1656
1657                 nla_nest_end(msg, nl_cmds);
1658                 state->split_start++;
1659                 if (state->split)
1660                         break;
1661         case 5:
1662                 if (rdev->ops->remain_on_channel &&
1663                     (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1664                     nla_put_u32(msg,
1665                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1666                                 rdev->wiphy.max_remain_on_channel_duration))
1667                         goto nla_put_failure;
1668
1669                 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1670                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1671                         goto nla_put_failure;
1672
1673                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1674                         goto nla_put_failure;
1675                 state->split_start++;
1676                 if (state->split)
1677                         break;
1678         case 6:
1679 #ifdef CONFIG_PM
1680                 if (nl80211_send_wowlan(msg, rdev, state->split))
1681                         goto nla_put_failure;
1682                 state->split_start++;
1683                 if (state->split)
1684                         break;
1685 #else
1686                 state->split_start++;
1687 #endif
1688         case 7:
1689                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1690                                         rdev->wiphy.software_iftypes))
1691                         goto nla_put_failure;
1692
1693                 if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
1694                                                    state->split))
1695                         goto nla_put_failure;
1696
1697                 state->split_start++;
1698                 if (state->split)
1699                         break;
1700         case 8:
1701                 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1702                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1703                                 rdev->wiphy.ap_sme_capa))
1704                         goto nla_put_failure;
1705
1706                 features = rdev->wiphy.features;
1707                 /*
1708                  * We can only add the per-channel limit information if the
1709                  * dump is split, otherwise it makes it too big. Therefore
1710                  * only advertise it in that case.
1711                  */
1712                 if (state->split)
1713                         features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
1714                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
1715                         goto nla_put_failure;
1716
1717                 if (rdev->wiphy.ht_capa_mod_mask &&
1718                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1719                             sizeof(*rdev->wiphy.ht_capa_mod_mask),
1720                             rdev->wiphy.ht_capa_mod_mask))
1721                         goto nla_put_failure;
1722
1723                 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1724                     rdev->wiphy.max_acl_mac_addrs &&
1725                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1726                                 rdev->wiphy.max_acl_mac_addrs))
1727                         goto nla_put_failure;
1728
1729                 /*
1730                  * Any information below this point is only available to
1731                  * applications that can deal with it being split. This
1732                  * helps ensure that newly added capabilities don't break
1733                  * older tools by overrunning their buffers.
1734                  *
1735                  * We still increment split_start so that in the split
1736                  * case we'll continue with more data in the next round,
1737                  * but break unconditionally so unsplit data stops here.
1738                  */
1739                 state->split_start++;
1740                 break;
1741         case 9:
1742                 if (rdev->wiphy.extended_capabilities &&
1743                     (nla_put(msg, NL80211_ATTR_EXT_CAPA,
1744                              rdev->wiphy.extended_capabilities_len,
1745                              rdev->wiphy.extended_capabilities) ||
1746                      nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1747                              rdev->wiphy.extended_capabilities_len,
1748                              rdev->wiphy.extended_capabilities_mask)))
1749                         goto nla_put_failure;
1750
1751                 if (rdev->wiphy.vht_capa_mod_mask &&
1752                     nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
1753                             sizeof(*rdev->wiphy.vht_capa_mod_mask),
1754                             rdev->wiphy.vht_capa_mod_mask))
1755                         goto nla_put_failure;
1756
1757                 state->split_start++;
1758                 break;
1759         case 10:
1760                 if (nl80211_send_coalesce(msg, rdev))
1761                         goto nla_put_failure;
1762
1763                 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
1764                     (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
1765                      nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
1766                         goto nla_put_failure;
1767
1768                 if (rdev->wiphy.max_ap_assoc_sta &&
1769                     nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
1770                                 rdev->wiphy.max_ap_assoc_sta))
1771                         goto nla_put_failure;
1772
1773                 state->split_start++;
1774                 break;
1775         case 11:
1776                 if (rdev->wiphy.n_vendor_commands) {
1777                         const struct nl80211_vendor_cmd_info *info;
1778                         struct nlattr *nested;
1779
1780                         nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
1781                         if (!nested)
1782                                 goto nla_put_failure;
1783
1784                         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1785                                 info = &rdev->wiphy.vendor_commands[i].info;
1786                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1787                                         goto nla_put_failure;
1788                         }
1789                         nla_nest_end(msg, nested);
1790                 }
1791
1792                 if (rdev->wiphy.n_vendor_events) {
1793                         const struct nl80211_vendor_cmd_info *info;
1794                         struct nlattr *nested;
1795
1796                         nested = nla_nest_start(msg,
1797                                                 NL80211_ATTR_VENDOR_EVENTS);
1798                         if (!nested)
1799                                 goto nla_put_failure;
1800
1801                         for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
1802                                 info = &rdev->wiphy.vendor_events[i];
1803                                 if (nla_put(msg, i + 1, sizeof(*info), info))
1804                                         goto nla_put_failure;
1805                         }
1806                         nla_nest_end(msg, nested);
1807                 }
1808                 state->split_start++;
1809                 break;
1810         case 12:
1811                 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
1812                     nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
1813                                rdev->wiphy.max_num_csa_counters))
1814                         goto nla_put_failure;
1815
1816                 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
1817                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
1818                         goto nla_put_failure;
1819
1820                 if (rdev->wiphy.max_sched_scan_reqs &&
1821                     nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_MAX_REQS,
1822                                 rdev->wiphy.max_sched_scan_reqs))
1823                         goto nla_put_failure;
1824
1825                 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
1826                             sizeof(rdev->wiphy.ext_features),
1827                             rdev->wiphy.ext_features))
1828                         goto nla_put_failure;
1829
1830                 if (rdev->wiphy.bss_select_support) {
1831                         struct nlattr *nested;
1832                         u32 bss_select_support = rdev->wiphy.bss_select_support;
1833
1834                         nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT);
1835                         if (!nested)
1836                                 goto nla_put_failure;
1837
1838                         i = 0;
1839                         while (bss_select_support) {
1840                                 if ((bss_select_support & 1) &&
1841                                     nla_put_flag(msg, i))
1842                                         goto nla_put_failure;
1843                                 i++;
1844                                 bss_select_support >>= 1;
1845                         }
1846                         nla_nest_end(msg, nested);
1847                 }
1848
1849                 state->split_start++;
1850                 break;
1851         case 13:
1852                 if (rdev->wiphy.num_iftype_ext_capab &&
1853                     rdev->wiphy.iftype_ext_capab) {
1854                         struct nlattr *nested_ext_capab, *nested;
1855
1856                         nested = nla_nest_start(msg,
1857                                                 NL80211_ATTR_IFTYPE_EXT_CAPA);
1858                         if (!nested)
1859                                 goto nla_put_failure;
1860
1861                         for (i = state->capa_start;
1862                              i < rdev->wiphy.num_iftype_ext_capab; i++) {
1863                                 const struct wiphy_iftype_ext_capab *capab;
1864
1865                                 capab = &rdev->wiphy.iftype_ext_capab[i];
1866
1867                                 nested_ext_capab = nla_nest_start(msg, i);
1868                                 if (!nested_ext_capab ||
1869                                     nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1870                                                 capab->iftype) ||
1871                                     nla_put(msg, NL80211_ATTR_EXT_CAPA,
1872                                             capab->extended_capabilities_len,
1873                                             capab->extended_capabilities) ||
1874                                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
1875                                             capab->extended_capabilities_len,
1876                                             capab->extended_capabilities_mask))
1877                                         goto nla_put_failure;
1878
1879                                 nla_nest_end(msg, nested_ext_capab);
1880                                 if (state->split)
1881                                         break;
1882                         }
1883                         nla_nest_end(msg, nested);
1884                         if (i < rdev->wiphy.num_iftype_ext_capab) {
1885                                 state->capa_start = i + 1;
1886                                 break;
1887                         }
1888                 }
1889
1890                 if (nla_put_u32(msg, NL80211_ATTR_BANDS,
1891                                 rdev->wiphy.nan_supported_bands))
1892                         goto nla_put_failure;
1893
1894                 /* done */
1895                 state->split_start = 0;
1896                 break;
1897         }
1898  finish:
1899         genlmsg_end(msg, hdr);
1900         return 0;
1901
1902  nla_put_failure:
1903         genlmsg_cancel(msg, hdr);
1904         return -EMSGSIZE;
1905 }
1906
1907 static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
1908                                     struct netlink_callback *cb,
1909                                     struct nl80211_dump_wiphy_state *state)
1910 {
1911         struct nlattr **tb = genl_family_attrbuf(&nl80211_fam);
1912         int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, tb,
1913                               nl80211_fam.maxattr, nl80211_policy, NULL);
1914         /* ignore parse errors for backward compatibility */
1915         if (ret)
1916                 return 0;
1917
1918         state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1919         if (tb[NL80211_ATTR_WIPHY])
1920                 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1921         if (tb[NL80211_ATTR_WDEV])
1922                 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1923         if (tb[NL80211_ATTR_IFINDEX]) {
1924                 struct net_device *netdev;
1925                 struct cfg80211_registered_device *rdev;
1926                 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1927
1928                 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1929                 if (!netdev)
1930                         return -ENODEV;
1931                 if (netdev->ieee80211_ptr) {
1932                         rdev = wiphy_to_rdev(
1933                                 netdev->ieee80211_ptr->wiphy);
1934                         state->filter_wiphy = rdev->wiphy_idx;
1935                 }
1936         }
1937
1938         return 0;
1939 }
1940
1941 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1942 {
1943         int idx = 0, ret;
1944         struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
1945         struct cfg80211_registered_device *rdev;
1946
1947         rtnl_lock();
1948         if (!state) {
1949                 state = kzalloc(sizeof(*state), GFP_KERNEL);
1950                 if (!state) {
1951                         rtnl_unlock();
1952                         return -ENOMEM;
1953                 }
1954                 state->filter_wiphy = -1;
1955                 ret = nl80211_dump_wiphy_parse(skb, cb, state);
1956                 if (ret) {
1957                         kfree(state);
1958                         rtnl_unlock();
1959                         return ret;
1960                 }
1961                 cb->args[0] = (long)state;
1962         }
1963
1964         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1965                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1966                         continue;
1967                 if (++idx <= state->start)
1968                         continue;
1969                 if (state->filter_wiphy != -1 &&
1970                     state->filter_wiphy != rdev->wiphy_idx)
1971                         continue;
1972                 /* attempt to fit multiple wiphy data chunks into the skb */
1973                 do {
1974                         ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
1975                                                  skb,
1976                                                  NETLINK_CB(cb->skb).portid,
1977                                                  cb->nlh->nlmsg_seq,
1978                                                  NLM_F_MULTI, state);
1979                         if (ret < 0) {
1980                                 /*
1981                                  * If sending the wiphy data didn't fit (ENOBUFS
1982                                  * or EMSGSIZE returned), this SKB is still
1983                                  * empty (so it's not too big because another
1984                                  * wiphy dataset is already in the skb) and
1985                                  * we've not tried to adjust the dump allocation
1986                                  * yet ... then adjust the alloc size to be
1987                                  * bigger, and return 1 but with the empty skb.
1988                                  * This results in an empty message being RX'ed
1989                                  * in userspace, but that is ignored.
1990                                  *
1991                                  * We can then retry with the larger buffer.
1992                                  */
1993                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1994                                     !skb->len && !state->split &&
1995                                     cb->min_dump_alloc < 4096) {
1996                                         cb->min_dump_alloc = 4096;
1997                                         state->split_start = 0;
1998                                         rtnl_unlock();
1999                                         return 1;
2000                                 }
2001                                 idx--;
2002                                 break;
2003                         }
2004                 } while (state->split_start > 0);
2005                 break;
2006         }
2007         rtnl_unlock();
2008
2009         state->start = idx;
2010
2011         return skb->len;
2012 }
2013
2014 static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
2015 {
2016         kfree((void *)cb->args[0]);
2017         return 0;
2018 }
2019
2020 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
2021 {
2022         struct sk_buff *msg;
2023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2024         struct nl80211_dump_wiphy_state state = {};
2025
2026         msg = nlmsg_new(4096, GFP_KERNEL);
2027         if (!msg)
2028                 return -ENOMEM;
2029
2030         if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
2031                                info->snd_portid, info->snd_seq, 0,
2032                                &state) < 0) {
2033                 nlmsg_free(msg);
2034                 return -ENOBUFS;
2035         }
2036
2037         return genlmsg_reply(msg, info);
2038 }
2039
2040 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
2041         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
2042         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
2043         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
2044         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
2045         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
2046 };
2047
2048 static int parse_txq_params(struct nlattr *tb[],
2049                             struct ieee80211_txq_params *txq_params)
2050 {
2051         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
2052             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
2053             !tb[NL80211_TXQ_ATTR_AIFS])
2054                 return -EINVAL;
2055
2056         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
2057         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
2058         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
2059         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
2060         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
2061
2062         if (txq_params->ac >= NL80211_NUM_ACS)
2063                 return -EINVAL;
2064
2065         return 0;
2066 }
2067
2068 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
2069 {
2070         /*
2071          * You can only set the channel explicitly for WDS interfaces,
2072          * all others have their channel managed via their respective
2073          * "establish a connection" command (connect, join, ...)
2074          *
2075          * For AP/GO and mesh mode, the channel can be set with the
2076          * channel userspace API, but is only stored and passed to the
2077          * low-level driver when the AP starts or the mesh is joined.
2078          * This is for backward compatibility, userspace can also give
2079          * the channel in the start-ap or join-mesh commands instead.
2080          *
2081          * Monitors are special as they are normally slaved to
2082          * whatever else is going on, so they have their own special
2083          * operation to set the monitor channel if possible.
2084          */
2085         return !wdev ||
2086                 wdev->iftype == NL80211_IFTYPE_AP ||
2087                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
2088                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
2089                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
2090 }
2091
2092 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
2093                                  struct genl_info *info,
2094                                  struct cfg80211_chan_def *chandef)
2095 {
2096         u32 control_freq;
2097
2098         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
2099                 return -EINVAL;
2100
2101         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
2102
2103         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
2104         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
2105         chandef->center_freq1 = control_freq;
2106         chandef->center_freq2 = 0;
2107
2108         /* Primary channel not allowed */
2109         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
2110                 return -EINVAL;
2111
2112         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
2113                 enum nl80211_channel_type chantype;
2114
2115                 chantype = nla_get_u32(
2116                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
2117
2118                 switch (chantype) {
2119                 case NL80211_CHAN_NO_HT:
2120                 case NL80211_CHAN_HT20:
2121                 case NL80211_CHAN_HT40PLUS:
2122                 case NL80211_CHAN_HT40MINUS:
2123                         cfg80211_chandef_create(chandef, chandef->chan,
2124                                                 chantype);
2125                         break;
2126                 default:
2127                         return -EINVAL;
2128                 }
2129         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
2130                 chandef->width =
2131                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
2132                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
2133                         chandef->center_freq1 =
2134                                 nla_get_u32(
2135                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
2136                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
2137                         chandef->center_freq2 =
2138                                 nla_get_u32(
2139                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
2140         }
2141
2142         if (!cfg80211_chandef_valid(chandef))
2143                 return -EINVAL;
2144
2145         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
2146                                      IEEE80211_CHAN_DISABLED))
2147                 return -EINVAL;
2148
2149         if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
2150              chandef->width == NL80211_CHAN_WIDTH_10) &&
2151             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ))
2152                 return -EINVAL;
2153
2154         return 0;
2155 }
2156
2157 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
2158                                  struct net_device *dev,
2159                                  struct genl_info *info)
2160 {
2161         struct cfg80211_chan_def chandef;
2162         int result;
2163         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
2164         struct wireless_dev *wdev = NULL;
2165
2166         if (dev)
2167                 wdev = dev->ieee80211_ptr;
2168         if (!nl80211_can_set_dev_channel(wdev))
2169                 return -EOPNOTSUPP;
2170         if (wdev)
2171                 iftype = wdev->iftype;
2172
2173         result = nl80211_parse_chandef(rdev, info, &chandef);
2174         if (result)
2175                 return result;
2176
2177         switch (iftype) {
2178         case NL80211_IFTYPE_AP:
2179         case NL80211_IFTYPE_P2P_GO:
2180                 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
2181                                                    iftype)) {
2182                         result = -EINVAL;
2183                         break;
2184                 }
2185                 if (wdev->beacon_interval) {
2186                         if (!dev || !rdev->ops->set_ap_chanwidth ||
2187                             !(rdev->wiphy.features &
2188                               NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) {
2189                                 result = -EBUSY;
2190                                 break;
2191                         }
2192
2193                         /* Only allow dynamic channel width changes */
2194                         if (chandef.chan != wdev->preset_chandef.chan) {
2195                                 result = -EBUSY;
2196                                 break;
2197                         }
2198                         result = rdev_set_ap_chanwidth(rdev, dev, &chandef);
2199                         if (result)
2200                                 break;
2201                 }
2202                 wdev->preset_chandef = chandef;
2203                 result = 0;
2204                 break;
2205         case NL80211_IFTYPE_MESH_POINT:
2206                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
2207                 break;
2208         case NL80211_IFTYPE_MONITOR:
2209                 result = cfg80211_set_monitor_channel(rdev, &chandef);
2210                 break;
2211         default:
2212                 result = -EINVAL;
2213         }
2214
2215         return result;
2216 }
2217
2218 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
2219 {
2220         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2221         struct net_device *netdev = info->user_ptr[1];
2222
2223         return __nl80211_set_channel(rdev, netdev, info);
2224 }
2225
2226 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
2227 {
2228         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2229         struct net_device *dev = info->user_ptr[1];
2230         struct wireless_dev *wdev = dev->ieee80211_ptr;
2231         const u8 *bssid;
2232
2233         if (!info->attrs[NL80211_ATTR_MAC])
2234                 return -EINVAL;
2235
2236         if (netif_running(dev))
2237                 return -EBUSY;
2238
2239         if (!rdev->ops->set_wds_peer)
2240                 return -EOPNOTSUPP;
2241
2242         if (wdev->iftype != NL80211_IFTYPE_WDS)
2243                 return -EOPNOTSUPP;
2244
2245         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
2246         return rdev_set_wds_peer(rdev, dev, bssid);
2247 }
2248
2249 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
2250 {
2251         struct cfg80211_registered_device *rdev;
2252         struct net_device *netdev = NULL;
2253         struct wireless_dev *wdev;
2254         int result = 0, rem_txq_params = 0;
2255         struct nlattr *nl_txq_params;
2256         u32 changed;
2257         u8 retry_short = 0, retry_long = 0;
2258         u32 frag_threshold = 0, rts_threshold = 0;
2259         u8 coverage_class = 0;
2260
2261         ASSERT_RTNL();
2262
2263         /*
2264          * Try to find the wiphy and netdev. Normally this
2265          * function shouldn't need the netdev, but this is
2266          * done for backward compatibility -- previously
2267          * setting the channel was done per wiphy, but now
2268          * it is per netdev. Previous userland like hostapd
2269          * also passed a netdev to set_wiphy, so that it is
2270          * possible to let that go to the right netdev!
2271          */
2272
2273         if (info->attrs[NL80211_ATTR_IFINDEX]) {
2274                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
2275
2276                 netdev = __dev_get_by_index(genl_info_net(info), ifindex);
2277                 if (netdev && netdev->ieee80211_ptr)
2278                         rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
2279                 else
2280                         netdev = NULL;
2281         }
2282
2283         if (!netdev) {
2284                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
2285                                                   info->attrs);
2286                 if (IS_ERR(rdev))
2287                         return PTR_ERR(rdev);
2288                 wdev = NULL;
2289                 netdev = NULL;
2290                 result = 0;
2291         } else
2292                 wdev = netdev->ieee80211_ptr;
2293
2294         /*
2295          * end workaround code, by now the rdev is available
2296          * and locked, and wdev may or may not be NULL.
2297          */
2298
2299         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
2300                 result = cfg80211_dev_rename(
2301                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
2302
2303         if (result)
2304                 return result;
2305
2306         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
2307                 struct ieee80211_txq_params txq_params;
2308                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
2309
2310                 if (!rdev->ops->set_txq_params)
2311                         return -EOPNOTSUPP;
2312
2313                 if (!netdev)
2314                         return -EINVAL;
2315
2316                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2317                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2318                         return -EINVAL;
2319
2320                 if (!netif_running(netdev))
2321                         return -ENETDOWN;
2322
2323                 nla_for_each_nested(nl_txq_params,
2324                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
2325                                     rem_txq_params) {
2326                         result = nla_parse_nested(tb, NL80211_TXQ_ATTR_MAX,
2327                                                   nl_txq_params,
2328                                                   txq_params_policy,
2329                                                   info->extack);
2330                         if (result)
2331                                 return result;
2332                         result = parse_txq_params(tb, &txq_params);
2333                         if (result)
2334                                 return result;
2335
2336                         result = rdev_set_txq_params(rdev, netdev,
2337                                                      &txq_params);
2338                         if (result)
2339                                 return result;
2340                 }
2341         }
2342
2343         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2344                 result = __nl80211_set_channel(
2345                         rdev,
2346                         nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
2347                         info);
2348                 if (result)
2349                         return result;
2350         }
2351
2352         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
2353                 struct wireless_dev *txp_wdev = wdev;
2354                 enum nl80211_tx_power_setting type;
2355                 int idx, mbm = 0;
2356
2357                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
2358                         txp_wdev = NULL;
2359
2360                 if (!rdev->ops->set_tx_power)
2361                         return -EOPNOTSUPP;
2362
2363                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
2364                 type = nla_get_u32(info->attrs[idx]);
2365
2366                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
2367                     (type != NL80211_TX_POWER_AUTOMATIC))
2368                         return -EINVAL;
2369
2370                 if (type != NL80211_TX_POWER_AUTOMATIC) {
2371                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
2372                         mbm = nla_get_u32(info->attrs[idx]);
2373                 }
2374
2375                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
2376                 if (result)
2377                         return result;
2378         }
2379
2380         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
2381             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
2382                 u32 tx_ant, rx_ant;
2383
2384                 if ((!rdev->wiphy.available_antennas_tx &&
2385                      !rdev->wiphy.available_antennas_rx) ||
2386                     !rdev->ops->set_antenna)
2387                         return -EOPNOTSUPP;
2388
2389                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
2390                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
2391
2392                 /* reject antenna configurations which don't match the
2393                  * available antenna masks, except for the "all" mask */
2394                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
2395                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx)))
2396                         return -EINVAL;
2397
2398                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
2399                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
2400
2401                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
2402                 if (result)
2403                         return result;
2404         }
2405
2406         changed = 0;
2407
2408         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
2409                 retry_short = nla_get_u8(
2410                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
2411                 if (retry_short == 0)
2412                         return -EINVAL;
2413
2414                 changed |= WIPHY_PARAM_RETRY_SHORT;
2415         }
2416
2417         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
2418                 retry_long = nla_get_u8(
2419                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
2420                 if (retry_long == 0)
2421                         return -EINVAL;
2422
2423                 changed |= WIPHY_PARAM_RETRY_LONG;
2424         }
2425
2426         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2427                 frag_threshold = nla_get_u32(
2428                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2429                 if (frag_threshold < 256)
2430                         return -EINVAL;
2431
2432                 if (frag_threshold != (u32) -1) {
2433                         /*
2434                          * Fragments (apart from the last one) are required to
2435                          * have even length. Make the fragmentation code
2436                          * simpler by stripping LSB should someone try to use
2437                          * odd threshold value.
2438                          */
2439                         frag_threshold &= ~0x1;
2440                 }
2441                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2442         }
2443
2444         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2445                 rts_threshold = nla_get_u32(
2446                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2447                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2448         }
2449
2450         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2451                 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
2452                         return -EINVAL;
2453
2454                 coverage_class = nla_get_u8(
2455                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2456                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2457         }
2458
2459         if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
2460                 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
2461                         return -EOPNOTSUPP;
2462
2463                 changed |= WIPHY_PARAM_DYN_ACK;
2464         }
2465
2466         if (changed) {
2467                 u8 old_retry_short, old_retry_long;
2468                 u32 old_frag_threshold, old_rts_threshold;
2469                 u8 old_coverage_class;
2470
2471                 if (!rdev->ops->set_wiphy_params)
2472                         return -EOPNOTSUPP;
2473
2474                 old_retry_short = rdev->wiphy.retry_short;
2475                 old_retry_long = rdev->wiphy.retry_long;
2476                 old_frag_threshold = rdev->wiphy.frag_threshold;
2477                 old_rts_threshold = rdev->wiphy.rts_threshold;
2478                 old_coverage_class = rdev->wiphy.coverage_class;
2479
2480                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2481                         rdev->wiphy.retry_short = retry_short;
2482                 if (changed & WIPHY_PARAM_RETRY_LONG)
2483                         rdev->wiphy.retry_long = retry_long;
2484                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2485                         rdev->wiphy.frag_threshold = frag_threshold;
2486                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2487                         rdev->wiphy.rts_threshold = rts_threshold;
2488                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2489                         rdev->wiphy.coverage_class = coverage_class;
2490
2491                 result = rdev_set_wiphy_params(rdev, changed);
2492                 if (result) {
2493                         rdev->wiphy.retry_short = old_retry_short;
2494                         rdev->wiphy.retry_long = old_retry_long;
2495                         rdev->wiphy.frag_threshold = old_frag_threshold;
2496                         rdev->wiphy.rts_threshold = old_rts_threshold;
2497                         rdev->wiphy.coverage_class = old_coverage_class;
2498                         return result;
2499                 }
2500         }
2501         return 0;
2502 }
2503
2504 static inline u64 wdev_id(struct wireless_dev *wdev)
2505 {
2506         return (u64)wdev->identifier |
2507                ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32);
2508 }
2509
2510 static int nl80211_send_chandef(struct sk_buff *msg,
2511                                 const struct cfg80211_chan_def *chandef)
2512 {
2513         if (WARN_ON(!cfg80211_chandef_valid(chandef)))
2514                 return -EINVAL;
2515
2516         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2517                         chandef->chan->center_freq))
2518                 return -ENOBUFS;
2519         switch (chandef->width) {
2520         case NL80211_CHAN_WIDTH_20_NOHT:
2521         case NL80211_CHAN_WIDTH_20:
2522         case NL80211_CHAN_WIDTH_40:
2523                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2524                                 cfg80211_get_chandef_type(chandef)))
2525                         return -ENOBUFS;
2526                 break;
2527         default:
2528                 break;
2529         }
2530         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2531                 return -ENOBUFS;
2532         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2533                 return -ENOBUFS;
2534         if (chandef->center_freq2 &&
2535             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2536                 return -ENOBUFS;
2537         return 0;
2538 }
2539
2540 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2541                               struct cfg80211_registered_device *rdev,
2542                               struct wireless_dev *wdev, bool removal)
2543 {
2544         struct net_device *dev = wdev->netdev;
2545         u8 cmd = NL80211_CMD_NEW_INTERFACE;
2546         void *hdr;
2547
2548         if (removal)
2549                 cmd = NL80211_CMD_DEL_INTERFACE;
2550
2551         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
2552         if (!hdr)
2553                 return -1;
2554
2555         if (dev &&
2556             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2557              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2558                 goto nla_put_failure;
2559
2560         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2561             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2562             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
2563                               NL80211_ATTR_PAD) ||
2564             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2565             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2566                         rdev->devlist_generation ^
2567                         (cfg80211_rdev_list_generation << 2)))
2568                 goto nla_put_failure;
2569
2570         if (rdev->ops->get_channel) {
2571                 int ret;
2572                 struct cfg80211_chan_def chandef;
2573
2574                 ret = rdev_get_channel(rdev, wdev, &chandef);
2575                 if (ret == 0) {
2576                         if (nl80211_send_chandef(msg, &chandef))
2577                                 goto nla_put_failure;
2578                 }
2579         }
2580
2581         if (rdev->ops->get_tx_power) {
2582                 int dbm, ret;
2583
2584                 ret = rdev_get_tx_power(rdev, wdev, &dbm);
2585                 if (ret == 0 &&
2586                     nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
2587                                 DBM_TO_MBM(dbm)))
2588                         goto nla_put_failure;
2589         }
2590
2591         if (wdev->ssid_len) {
2592                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2593                         goto nla_put_failure;
2594         }
2595
2596         genlmsg_end(msg, hdr);
2597         return 0;
2598
2599  nla_put_failure:
2600         genlmsg_cancel(msg, hdr);
2601         return -EMSGSIZE;
2602 }
2603
2604 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2605 {
2606         int wp_idx = 0;
2607         int if_idx = 0;
2608         int wp_start = cb->args[0];
2609         int if_start = cb->args[1];
2610         int filter_wiphy = -1;
2611         struct cfg80211_registered_device *rdev;
2612         struct wireless_dev *wdev;
2613         int ret;
2614
2615         rtnl_lock();
2616         if (!cb->args[2]) {
2617                 struct nl80211_dump_wiphy_state state = {
2618                         .filter_wiphy = -1,
2619                 };
2620
2621                 ret = nl80211_dump_wiphy_parse(skb, cb, &state);
2622                 if (ret)
2623                         goto out_unlock;
2624
2625                 filter_wiphy = state.filter_wiphy;
2626
2627                 /*
2628                  * if filtering, set cb->args[2] to +1 since 0 is the default
2629                  * value needed to determine that parsing is necessary.
2630                  */
2631                 if (filter_wiphy >= 0)
2632                         cb->args[2] = filter_wiphy + 1;
2633                 else
2634                         cb->args[2] = -1;
2635         } else if (cb->args[2] > 0) {
2636                 filter_wiphy = cb->args[2] - 1;
2637         }
2638
2639         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2640                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2641                         continue;
2642                 if (wp_idx < wp_start) {
2643                         wp_idx++;
2644                         continue;
2645                 }
2646
2647                 if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
2648                         continue;
2649
2650                 if_idx = 0;
2651
2652                 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
2653                         if (if_idx < if_start) {
2654                                 if_idx++;
2655                                 continue;
2656                         }
2657                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2658                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2659                                                rdev, wdev, false) < 0) {
2660                                 goto out;
2661                         }
2662                         if_idx++;
2663                 }
2664
2665                 wp_idx++;
2666         }
2667  out:
2668         cb->args[0] = wp_idx;
2669         cb->args[1] = if_idx;
2670
2671         ret = skb->len;
2672  out_unlock:
2673         rtnl_unlock();
2674
2675         return ret;
2676 }
2677
2678 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2679 {
2680         struct sk_buff *msg;
2681         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2682         struct wireless_dev *wdev = info->user_ptr[1];
2683
2684         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2685         if (!msg)
2686                 return -ENOMEM;
2687
2688         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2689                                rdev, wdev, false) < 0) {
2690                 nlmsg_free(msg);
2691                 return -ENOBUFS;
2692         }
2693
2694         return genlmsg_reply(msg, info);
2695 }
2696
2697 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2698         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2699         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2700         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2701         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2702         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2703         [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
2704 };
2705
2706 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2707 {
2708         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2709         int flag;
2710
2711         *mntrflags = 0;
2712
2713         if (!nla)
2714                 return -EINVAL;
2715
2716         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX, nla,
2717                              mntr_flags_policy, NULL))
2718                 return -EINVAL;
2719
2720         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2721                 if (flags[flag])
2722                         *mntrflags |= (1<<flag);
2723
2724         *mntrflags |= MONITOR_FLAG_CHANGED;
2725
2726         return 0;
2727 }
2728
2729 static int nl80211_parse_mon_options(struct cfg80211_registered_device *rdev,
2730                                      enum nl80211_iftype type,
2731                                      struct genl_info *info,
2732                                      struct vif_params *params)
2733 {
2734         bool change = false;
2735         int err;
2736
2737         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2738                 if (type != NL80211_IFTYPE_MONITOR)
2739                         return -EINVAL;
2740
2741                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2742                                           &params->flags);
2743                 if (err)
2744                         return err;
2745
2746                 change = true;
2747         }
2748
2749         if (params->flags & MONITOR_FLAG_ACTIVE &&
2750             !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
2751                 return -EOPNOTSUPP;
2752
2753         if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
2754                 const u8 *mumimo_groups;
2755                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2756
2757                 if (type != NL80211_IFTYPE_MONITOR)
2758                         return -EINVAL;
2759
2760                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2761                         return -EOPNOTSUPP;
2762
2763                 mumimo_groups =
2764                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);
2765
2766                 /* bits 0 and 63 are reserved and must be zero */
2767                 if ((mumimo_groups[0] & BIT(0)) ||
2768                     (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(7)))
2769                         return -EINVAL;
2770
2771                 params->vht_mumimo_groups = mumimo_groups;
2772                 change = true;
2773         }
2774
2775         if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
2776                 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;
2777
2778                 if (type != NL80211_IFTYPE_MONITOR)
2779                         return -EINVAL;
2780
2781                 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
2782                         return -EOPNOTSUPP;
2783
2784                 params->vht_mumimo_follow_addr =
2785                         nla_data(info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]);
2786                 change = true;
2787         }
2788
2789         return change ? 1 : 0;
2790 }
2791
2792 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2793                                struct net_device *netdev, u8 use_4addr,
2794                                enum nl80211_iftype iftype)
2795 {
2796         if (!use_4addr) {
2797                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2798                         return -EBUSY;
2799                 return 0;
2800         }
2801
2802         switch (iftype) {
2803         case NL80211_IFTYPE_AP_VLAN:
2804                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2805                         return 0;
2806                 break;
2807         case NL80211_IFTYPE_STATION:
2808                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2809                         return 0;
2810                 break;
2811         default:
2812                 break;
2813         }
2814
2815         return -EOPNOTSUPP;
2816 }
2817
2818 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2819 {
2820         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2821         struct vif_params params;
2822         int err;
2823         enum nl80211_iftype otype, ntype;
2824         struct net_device *dev = info->user_ptr[1];
2825         bool change = false;
2826
2827         memset(&params, 0, sizeof(params));
2828
2829         otype = ntype = dev->ieee80211_ptr->iftype;
2830
2831         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2832                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2833                 if (otype != ntype)
2834                         change = true;
2835                 if (ntype > NL80211_IFTYPE_MAX)
2836                         return -EINVAL;
2837         }
2838
2839         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2840                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2841
2842                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2843                         return -EINVAL;
2844                 if (netif_running(dev))
2845                         return -EBUSY;
2846
2847                 wdev_lock(wdev);
2848                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2849                              IEEE80211_MAX_MESH_ID_LEN);
2850                 wdev->mesh_id_up_len =
2851                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2852                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2853                        wdev->mesh_id_up_len);
2854                 wdev_unlock(wdev);
2855         }
2856
2857         if (info->attrs[NL80211_ATTR_4ADDR]) {
2858                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2859                 change = true;
2860                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2861                 if (err)
2862                         return err;
2863         } else {
2864                 params.use_4addr = -1;
2865         }
2866
2867         err = nl80211_parse_mon_options(rdev, ntype, info, &params);
2868         if (err < 0)
2869                 return err;
2870         if (err > 0)
2871                 change = true;
2872
2873         if (change)
2874                 err = cfg80211_change_iface(rdev, dev, ntype, &params);
2875         else
2876                 err = 0;
2877
2878         if (!err && params.use_4addr != -1)
2879                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2880
2881         return err;
2882 }
2883
2884 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2885 {
2886         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2887         struct vif_params params;
2888         struct wireless_dev *wdev;
2889         struct sk_buff *msg;
2890         int err;
2891         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2892
2893         /* to avoid failing a new interface creation due to pending removal */
2894         cfg80211_destroy_ifaces(rdev);
2895
2896         memset(&params, 0, sizeof(params));
2897
2898         if (!info->attrs[NL80211_ATTR_IFNAME])
2899                 return -EINVAL;
2900
2901         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2902                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2903                 if (type > NL80211_IFTYPE_MAX)
2904                         return -EINVAL;
2905         }
2906
2907         if (!rdev->ops->add_virtual_intf ||
2908             !(rdev->wiphy.interface_modes & (1 << type)))
2909                 return -EOPNOTSUPP;
2910
2911         if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN ||
2912              rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
2913             info->attrs[NL80211_ATTR_MAC]) {
2914                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2915                            ETH_ALEN);
2916                 if (!is_valid_ether_addr(params.macaddr))
2917                         return -EADDRNOTAVAIL;
2918         }
2919
2920         if (info->attrs[NL80211_ATTR_4ADDR]) {
2921                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2922                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2923                 if (err)
2924                         return err;
2925         }
2926
2927         err = nl80211_parse_mon_options(rdev, type, info, &params);
2928         if (err < 0)
2929                 return err;
2930
2931         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2932         if (!msg)
2933                 return -ENOMEM;
2934
2935         wdev = rdev_add_virtual_intf(rdev,
2936                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2937                                 NET_NAME_USER, type, &params);
2938         if (WARN_ON(!wdev)) {
2939                 nlmsg_free(msg);
2940                 return -EPROTO;
2941         } else if (IS_ERR(wdev)) {
2942                 nlmsg_free(msg);
2943                 return PTR_ERR(wdev);
2944         }
2945
2946         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
2947                 wdev->owner_nlportid = info->snd_portid;
2948
2949         switch (type) {
2950         case NL80211_IFTYPE_MESH_POINT:
2951                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2952                         break;
2953                 wdev_lock(wdev);
2954                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2955                              IEEE80211_MAX_MESH_ID_LEN);
2956                 wdev->mesh_id_up_len =
2957                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2958                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2959                        wdev->mesh_id_up_len);
2960                 wdev_unlock(wdev);
2961                 break;
2962         case NL80211_IFTYPE_NAN:
2963         case NL80211_IFTYPE_P2P_DEVICE:
2964                 /*
2965                  * P2P Device and NAN do not have a netdev, so don't go
2966                  * through the netdev notifier and must be added here
2967                  */
2968                 mutex_init(&wdev->mtx);
2969                 INIT_LIST_HEAD(&wdev->event_list);
2970                 spin_lock_init(&wdev->event_lock);
2971                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2972                 spin_lock_init(&wdev->mgmt_registrations_lock);
2973
2974                 wdev->identifier = ++rdev->wdev_id;
2975                 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
2976                 rdev->devlist_generation++;
2977                 break;
2978         default:
2979                 break;
2980         }
2981
2982         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2983                                rdev, wdev, false) < 0) {
2984                 nlmsg_free(msg);
2985                 return -ENOBUFS;
2986         }
2987
2988         /*
2989          * For wdevs which have no associated netdev object (e.g. of type
2990          * NL80211_IFTYPE_P2P_DEVICE), emit the NEW_INTERFACE event here.
2991          * For all other types, the event will be generated from the
2992          * netdev notifier
2993          */
2994         if (!wdev->netdev)
2995                 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
2996
2997         return genlmsg_reply(msg, info);
2998 }
2999
3000 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
3001 {
3002         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3003         struct wireless_dev *wdev = info->user_ptr[1];
3004
3005         if (!rdev->ops->del_virtual_intf)
3006                 return -EOPNOTSUPP;
3007
3008         /*
3009          * If we remove a wireless device without a netdev then clear
3010          * user_ptr[1] so that nl80211_post_doit won't dereference it
3011          * to check if it needs to do dev_put(). Otherwise it crashes
3012          * since the wdev has been freed, unlike with a netdev where
3013          * we need the dev_put() for the netdev to really be freed.
3014          */
3015         if (!wdev->netdev)
3016                 info->user_ptr[1] = NULL;
3017
3018         return rdev_del_virtual_intf(rdev, wdev);
3019 }
3020
3021 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
3022 {
3023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3024         struct net_device *dev = info->user_ptr[1];
3025         u16 noack_map;
3026
3027         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
3028                 return -EINVAL;
3029
3030         if (!rdev->ops->set_noack_map)
3031                 return -EOPNOTSUPP;
3032
3033         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
3034
3035         return rdev_set_noack_map(rdev, dev, noack_map);
3036 }
3037
3038 struct get_key_cookie {
3039         struct sk_buff *msg;
3040         int error;
3041         int idx;
3042 };
3043
3044 static void get_key_callback(void *c, struct key_params *params)
3045 {
3046         struct nlattr *key;
3047         struct get_key_cookie *cookie = c;
3048
3049         if ((params->key &&
3050              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
3051                      params->key_len, params->key)) ||
3052             (params->seq &&
3053              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
3054                      params->seq_len, params->seq)) ||
3055             (params->cipher &&
3056              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
3057                          params->cipher)))
3058                 goto nla_put_failure;
3059
3060         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
3061         if (!key)
3062                 goto nla_put_failure;
3063
3064         if ((params->key &&
3065              nla_put(cookie->msg, NL80211_KEY_DATA,
3066                      params->key_len, params->key)) ||
3067             (params->seq &&
3068              nla_put(cookie->msg, NL80211_KEY_SEQ,
3069                      params->seq_len, params->seq)) ||
3070             (params->cipher &&
3071              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
3072                          params->cipher)))
3073                 goto nla_put_failure;
3074
3075         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
3076                 goto nla_put_failure;
3077
3078         nla_nest_end(cookie->msg, key);
3079
3080         return;
3081  nla_put_failure:
3082         cookie->error = 1;
3083 }
3084
3085 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
3086 {
3087         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3088         int err;
3089         struct net_device *dev = info->user_ptr[1];
3090         u8 key_idx = 0;
3091         const u8 *mac_addr = NULL;
3092         bool pairwise;
3093         struct get_key_cookie cookie = {
3094                 .error = 0,
3095         };
3096         void *hdr;
3097         struct sk_buff *msg;
3098
3099         if (info->attrs[NL80211_ATTR_KEY_IDX])
3100                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
3101
3102         if (key_idx > 5)
3103                 return -EINVAL;
3104
3105         if (info->attrs[NL80211_ATTR_MAC])
3106                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3107
3108         pairwise = !!mac_addr;
3109         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
3110                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
3111
3112                 if (kt >= NUM_NL80211_KEYTYPES)
3113                         return -EINVAL;
3114                 if (kt != NL80211_KEYTYPE_GROUP &&
3115                     kt != NL80211_KEYTYPE_PAIRWISE)
3116                         return -EINVAL;
3117                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
3118         }
3119
3120         if (!rdev->ops->get_key)
3121                 return -EOPNOTSUPP;
3122
3123         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3124                 return -ENOENT;
3125
3126         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3127         if (!msg)
3128                 return -ENOMEM;
3129
3130         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3131                              NL80211_CMD_NEW_KEY);
3132         if (!hdr)
3133                 goto nla_put_failure;
3134
3135         cookie.msg = msg;
3136         cookie.idx = key_idx;
3137
3138         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3139             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
3140                 goto nla_put_failure;
3141         if (mac_addr &&
3142             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
3143                 goto nla_put_failure;
3144
3145         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
3146                            get_key_callback);
3147
3148         if (err)
3149                 goto free_msg;
3150
3151         if (cookie.error)
3152                 goto nla_put_failure;
3153
3154         genlmsg_end(msg, hdr);
3155         return genlmsg_reply(msg, info);
3156
3157  nla_put_failure:
3158         err = -ENOBUFS;
3159  free_msg:
3160         nlmsg_free(msg);
3161         return err;
3162 }
3163
3164 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
3165 {
3166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3167         struct key_parse key;
3168         int err;
3169         struct net_device *dev = info->user_ptr[1];
3170
3171         err = nl80211_parse_key(info, &key);
3172         if (err)
3173                 return err;
3174
3175         if (key.idx < 0)
3176                 return -EINVAL;
3177
3178         /* only support setting default key */
3179         if (!key.def && !key.defmgmt)
3180                 return -EINVAL;
3181
3182         wdev_lock(dev->ieee80211_ptr);
3183
3184         if (key.def) {
3185                 if (!rdev->ops->set_default_key) {
3186                         err = -EOPNOTSUPP;
3187                         goto out;
3188                 }
3189
3190                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3191                 if (err)
3192                         goto out;
3193
3194                 err = rdev_set_default_key(rdev, dev, key.idx,
3195                                                  key.def_uni, key.def_multi);
3196
3197                 if (err)
3198                         goto out;
3199
3200 #ifdef CONFIG_CFG80211_WEXT
3201                 dev->ieee80211_ptr->wext.default_key = key.idx;
3202 #endif
3203         } else {
3204                 if (key.def_uni || !key.def_multi) {
3205                         err = -EINVAL;
3206                         goto out;
3207                 }
3208
3209                 if (!rdev->ops->set_default_mgmt_key) {
3210                         err = -EOPNOTSUPP;
3211                         goto out;
3212                 }
3213
3214                 err = nl80211_key_allowed(dev->ieee80211_ptr);
3215                 if (err)
3216                         goto out;
3217
3218                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
3219                 if (err)
3220                         goto out;
3221
3222 #ifdef CONFIG_CFG80211_WEXT
3223                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
3224 #endif
3225         }
3226
3227  out:
3228         wdev_unlock(dev->ieee80211_ptr);
3229
3230         return err;
3231 }
3232
3233 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
3234 {
3235         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3236         int err;
3237         struct net_device *dev = info->user_ptr[1];
3238         struct key_parse key;
3239         const u8 *mac_addr = NULL;
3240
3241         err = nl80211_parse_key(info, &key);
3242         if (err)
3243                 return err;
3244
3245         if (!key.p.key)
3246                 return -EINVAL;
3247
3248         if (info->attrs[NL80211_ATTR_MAC])
3249                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3250
3251         if (key.type == -1) {
3252                 if (mac_addr)
3253                         key.type = NL80211_KEYTYPE_PAIRWISE;
3254                 else
3255                         key.type = NL80211_KEYTYPE_GROUP;
3256         }
3257
3258         /* for now */
3259         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3260             key.type != NL80211_KEYTYPE_GROUP)
3261                 return -EINVAL;
3262
3263         if (!rdev->ops->add_key)
3264                 return -EOPNOTSUPP;
3265
3266         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
3267                                            key.type == NL80211_KEYTYPE_PAIRWISE,
3268                                            mac_addr))
3269                 return -EINVAL;
3270
3271         wdev_lock(dev->ieee80211_ptr);
3272         err = nl80211_key_allowed(dev->ieee80211_ptr);
3273         if (!err)
3274                 err = rdev_add_key(rdev, dev, key.idx,
3275                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3276                                     mac_addr, &key.p);
3277         wdev_unlock(dev->ieee80211_ptr);
3278
3279         return err;
3280 }
3281
3282 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
3283 {
3284         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3285         int err;
3286         struct net_device *dev = info->user_ptr[1];
3287         u8 *mac_addr = NULL;
3288         struct key_parse key;
3289
3290         err = nl80211_parse_key(info, &key);
3291         if (err)
3292                 return err;
3293
3294         if (info->attrs[NL80211_ATTR_MAC])
3295                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3296
3297         if (key.type == -1) {
3298                 if (mac_addr)
3299                         key.type = NL80211_KEYTYPE_PAIRWISE;
3300                 else
3301                         key.type = NL80211_KEYTYPE_GROUP;
3302         }
3303
3304         /* for now */
3305         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
3306             key.type != NL80211_KEYTYPE_GROUP)
3307                 return -EINVAL;
3308
3309         if (!rdev->ops->del_key)
3310                 return -EOPNOTSUPP;
3311
3312         wdev_lock(dev->ieee80211_ptr);
3313         err = nl80211_key_allowed(dev->ieee80211_ptr);
3314
3315         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
3316             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
3317                 err = -ENOENT;
3318
3319         if (!err)
3320                 err = rdev_del_key(rdev, dev, key.idx,
3321                                    key.type == NL80211_KEYTYPE_PAIRWISE,
3322                                    mac_addr);
3323
3324 #ifdef CONFIG_CFG80211_WEXT
3325         if (!err) {
3326                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
3327                         dev->ieee80211_ptr->wext.default_key = -1;
3328                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
3329                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
3330         }
3331 #endif
3332         wdev_unlock(dev->ieee80211_ptr);
3333
3334         return err;
3335 }
3336
3337 /* This function returns an error or the number of nested attributes */
3338 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
3339 {
3340         struct nlattr *attr;
3341         int n_entries = 0, tmp;
3342
3343         nla_for_each_nested(attr, nl_attr, tmp) {
3344                 if (nla_len(attr) != ETH_ALEN)
3345                         return -EINVAL;
3346
3347                 n_entries++;
3348         }
3349
3350         return n_entries;
3351 }
3352
3353 /*
3354  * This function parses ACL information and allocates memory for ACL data.
3355  * On successful return, the calling function is responsible to free the
3356  * ACL buffer returned by this function.
3357  */
3358 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
3359                                                 struct genl_info *info)
3360 {
3361         enum nl80211_acl_policy acl_policy;
3362         struct nlattr *attr;
3363         struct cfg80211_acl_data *acl;
3364         int i = 0, n_entries, tmp;
3365
3366         if (!wiphy->max_acl_mac_addrs)
3367                 return ERR_PTR(-EOPNOTSUPP);
3368
3369         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
3370                 return ERR_PTR(-EINVAL);
3371
3372         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
3373         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
3374             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
3375                 return ERR_PTR(-EINVAL);
3376
3377         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
3378                 return ERR_PTR(-EINVAL);
3379
3380         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
3381         if (n_entries < 0)
3382                 return ERR_PTR(n_entries);
3383
3384         if (n_entries > wiphy->max_acl_mac_addrs)
3385                 return ERR_PTR(-ENOTSUPP);
3386
3387         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
3388                       GFP_KERNEL);
3389         if (!acl)
3390                 return ERR_PTR(-ENOMEM);
3391
3392         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
3393                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
3394                 i++;
3395         }
3396
3397         acl->n_acl_entries = n_entries;
3398         acl->acl_policy = acl_policy;
3399
3400         return acl;
3401 }
3402
3403 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
3404 {
3405         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3406         struct net_device *dev = info->user_ptr[1];
3407         struct cfg80211_acl_data *acl;
3408         int err;
3409
3410         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3411             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3412                 return -EOPNOTSUPP;
3413
3414         if (!dev->ieee80211_ptr->beacon_interval)
3415                 return -EINVAL;
3416
3417         acl = parse_acl_data(&rdev->wiphy, info);
3418         if (IS_ERR(acl))
3419                 return PTR_ERR(acl);
3420
3421         err = rdev_set_mac_acl(rdev, dev, acl);
3422
3423         kfree(acl);
3424
3425         return err;
3426 }
3427
3428 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
3429                            u8 *rates, u8 rates_len)
3430 {
3431         u8 i;
3432         u32 mask = 0;
3433
3434         for (i = 0; i < rates_len; i++) {
3435                 int rate = (rates[i] & 0x7f) * 5;
3436                 int ridx;
3437
3438                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
3439                         struct ieee80211_rate *srate =
3440                                 &sband->bitrates[ridx];
3441                         if (rate == srate->bitrate) {
3442                                 mask |= 1 << ridx;
3443                                 break;
3444                         }
3445                 }
3446                 if (ridx == sband->n_bitrates)
3447                         return 0; /* rate not found */
3448         }
3449
3450         return mask;
3451 }
3452
3453 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
3454                                u8 *rates, u8 rates_len,
3455                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
3456 {
3457         u8 i;
3458
3459         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
3460
3461         for (i = 0; i < rates_len; i++) {
3462                 int ridx, rbit;
3463
3464                 ridx = rates[i] / 8;
3465                 rbit = BIT(rates[i] % 8);
3466
3467                 /* check validity */
3468                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
3469                         return false;
3470
3471                 /* check availability */
3472                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
3473                         mcs[ridx] |= rbit;
3474                 else
3475                         return false;
3476         }
3477
3478         return true;
3479 }
3480
3481 static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
3482 {
3483         u16 mcs_mask = 0;
3484
3485         switch (vht_mcs_map) {
3486         case IEEE80211_VHT_MCS_NOT_SUPPORTED:
3487                 break;
3488         case IEEE80211_VHT_MCS_SUPPORT_0_7:
3489                 mcs_mask = 0x00FF;
3490                 break;
3491         case IEEE80211_VHT_MCS_SUPPORT_0_8:
3492                 mcs_mask = 0x01FF;
3493                 break;
3494         case IEEE80211_VHT_MCS_SUPPORT_0_9:
3495                 mcs_mask = 0x03FF;
3496                 break;
3497         default:
3498                 break;
3499         }
3500
3501         return mcs_mask;
3502 }
3503
3504 static void vht_build_mcs_mask(u16 vht_mcs_map,
3505                                u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
3506 {
3507         u8 nss;
3508
3509         for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
3510                 vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
3511                 vht_mcs_map >>= 2;
3512         }
3513 }
3514
3515 static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
3516                              struct nl80211_txrate_vht *txrate,
3517                              u16 mcs[NL80211_VHT_NSS_MAX])
3518 {
3519         u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3520         u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
3521         u8 i;
3522
3523         if (!sband->vht_cap.vht_supported)
3524                 return false;
3525
3526         memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
3527
3528         /* Build vht_mcs_mask from VHT capabilities */
3529         vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
3530
3531         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3532                 if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
3533                         mcs[i] = txrate->mcs[i];
3534                 else
3535                         return false;
3536         }
3537
3538         return true;
3539 }
3540
3541 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
3542         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
3543                                     .len = NL80211_MAX_SUPP_RATES },
3544         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
3545                                 .len = NL80211_MAX_SUPP_HT_RATES },
3546         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
3547         [NL80211_TXRATE_GI] = { .type = NLA_U8 },
3548 };
3549
3550 static int nl80211_parse_tx_bitrate_mask(struct genl_info *info,
3551                                          struct cfg80211_bitrate_mask *mask)
3552 {
3553         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
3554         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3555         int rem, i;
3556         struct nlattr *tx_rates;
3557         struct ieee80211_supported_band *sband;
3558         u16 vht_tx_mcs_map;
3559
3560         memset(mask, 0, sizeof(*mask));
3561         /* Default to all rates enabled */
3562         for (i = 0; i < NUM_NL80211_BANDS; i++) {
3563                 sband = rdev->wiphy.bands[i];
3564
3565                 if (!sband)
3566                         continue;
3567
3568                 mask->control[i].legacy = (1 << sband->n_bitrates) - 1;
3569                 memcpy(mask->control[i].ht_mcs,
3570                        sband->ht_cap.mcs.rx_mask,
3571                        sizeof(mask->control[i].ht_mcs));
3572
3573                 if (!sband->vht_cap.vht_supported)
3574                         continue;
3575
3576                 vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
3577                 vht_build_mcs_mask(vht_tx_mcs_map, mask->control[i].vht_mcs);
3578         }
3579
3580         /* if no rates are given set it back to the defaults */
3581         if (!info->attrs[NL80211_ATTR_TX_RATES])
3582                 goto out;
3583
3584         /* The nested attribute uses enum nl80211_band as the index. This maps
3585          * directly to the enum nl80211_band values used in cfg80211.
3586          */
3587         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
3588         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem) {
3589                 enum nl80211_band band = nla_type(tx_rates);
3590                 int err;
3591
3592                 if (band < 0 || band >= NUM_NL80211_BANDS)
3593                         return -EINVAL;
3594                 sband = rdev->wiphy.bands[band];
3595                 if (sband == NULL)
3596                         return -EINVAL;
3597                 err = nla_parse_nested(tb, NL80211_TXRATE_MAX, tx_rates,
3598                                        nl80211_txattr_policy, info->extack);
3599                 if (err)
3600                         return err;
3601                 if (tb[NL80211_TXRATE_LEGACY]) {
3602                         mask->control[band].legacy = rateset_to_mask(
3603                                 sband,
3604                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
3605                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
3606                         if ((mask->control[band].legacy == 0) &&
3607                             nla_len(tb[NL80211_TXRATE_LEGACY]))
3608                                 return -EINVAL;
3609                 }
3610                 if (tb[NL80211_TXRATE_HT]) {
3611                         if (!ht_rateset_to_mask(
3612                                         sband,
3613                                         nla_data(tb[NL80211_TXRATE_HT]),
3614                                         nla_len(tb[NL80211_TXRATE_HT]),
3615                                         mask->control[band].ht_mcs))
3616                                 return -EINVAL;
3617                 }
3618                 if (tb[NL80211_TXRATE_VHT]) {
3619                         if (!vht_set_mcs_mask(
3620                                         sband,
3621                                         nla_data(tb[NL80211_TXRATE_VHT]),
3622                                         mask->control[band].vht_mcs))
3623                                 return -EINVAL;
3624                 }
3625                 if (tb[NL80211_TXRATE_GI]) {
3626                         mask->control[band].gi =
3627                                 nla_get_u8(tb[NL80211_TXRATE_GI]);
3628                         if (mask->control[band].gi > NL80211_TXRATE_FORCE_LGI)
3629                                 return -EINVAL;
3630                 }
3631
3632                 if (mask->control[band].legacy == 0) {
3633                         /* don't allow empty legacy rates if HT or VHT
3634                          * are not even supported.
3635                          */
3636                         if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
3637                               rdev->wiphy.bands[band]->vht_cap.vht_supported))
3638                                 return -EINVAL;
3639
3640                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
3641                                 if (mask->control[band].ht_mcs[i])
3642                                         goto out;
3643
3644                         for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
3645                                 if (mask->control[band].vht_mcs[i])
3646                                         goto out;
3647
3648                         /* legacy and mcs rates may not be both empty */
3649                         return -EINVAL;
3650                 }
3651         }
3652
3653 out:
3654         return 0;
3655 }
3656
3657 static int validate_beacon_tx_rate(struct cfg80211_registered_device *rdev,
3658                                    enum nl80211_band band,
3659                                    struct cfg80211_bitrate_mask *beacon_rate)
3660 {
3661         u32 count_ht, count_vht, i;
3662         u32 rate = beacon_rate->control[band].legacy;
3663
3664         /* Allow only one rate */
3665         if (hweight32(rate) > 1)
3666                 return -EINVAL;
3667
3668         count_ht = 0;
3669         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
3670                 if (hweight8(beacon_rate->control[band].ht_mcs[i]) > 1) {
3671                         return -EINVAL;
3672                 } else if (beacon_rate->control[band].ht_mcs[i]) {
3673                         count_ht++;
3674                         if (count_ht > 1)
3675                                 return -EINVAL;
3676                 }
3677                 if (count_ht && rate)
3678                         return -EINVAL;
3679         }
3680
3681         count_vht = 0;
3682         for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
3683                 if (hweight16(beacon_rate->control[band].vht_mcs[i]) > 1) {
3684                         return -EINVAL;
3685                 } else if (beacon_rate->control[band].vht_mcs[i]) {
3686                         count_vht++;
3687                         if (count_vht > 1)
3688                                 return -EINVAL;
3689                 }
3690                 if (count_vht && rate)
3691                         return -EINVAL;
3692         }
3693
3694         if ((count_ht && count_vht) || (!rate && !count_ht && !count_vht))
3695                 return -EINVAL;
3696
3697         if (rate &&
3698             !wiphy_ext_feature_isset(&rdev->wiphy,
3699                                      NL80211_EXT_FEATURE_BEACON_RATE_LEGACY))
3700                 return -EINVAL;
3701         if (count_ht &&
3702             !wiphy_ext_feature_isset(&rdev->wiphy,
3703                                      NL80211_EXT_FEATURE_BEACON_RATE_HT))
3704                 return -EINVAL;
3705         if (count_vht &&
3706             !wiphy_ext_feature_isset(&rdev->wiphy,
3707                                      NL80211_EXT_FEATURE_BEACON_RATE_VHT))
3708                 return -EINVAL;
3709
3710         return 0;
3711 }
3712
3713 static int nl80211_parse_beacon(struct nlattr *attrs[],
3714                                 struct cfg80211_beacon_data *bcn)
3715 {
3716         bool haveinfo = false;
3717
3718         if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) ||
3719             !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) ||
3720             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
3721             !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP]))
3722                 return -EINVAL;
3723
3724         memset(bcn, 0, sizeof(*bcn));
3725
3726         if (attrs[NL80211_ATTR_BEACON_HEAD]) {
3727                 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
3728                 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
3729                 if (!bcn->head_len)
3730                         return -EINVAL;
3731                 haveinfo = true;
3732         }
3733
3734         if (attrs[NL80211_ATTR_BEACON_TAIL]) {
3735                 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
3736                 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
3737                 haveinfo = true;
3738         }
3739
3740         if (!haveinfo)
3741                 return -EINVAL;
3742
3743         if (attrs[NL80211_ATTR_IE]) {
3744                 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
3745                 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
3746         }
3747
3748         if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
3749                 bcn->proberesp_ies =
3750                         nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3751                 bcn->proberesp_ies_len =
3752                         nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
3753         }
3754
3755         if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
3756                 bcn->assocresp_ies =
3757                         nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3758                 bcn->assocresp_ies_len =
3759                         nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
3760         }
3761
3762         if (attrs[NL80211_ATTR_PROBE_RESP]) {
3763                 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
3764                 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
3765         }
3766
3767         return 0;
3768 }
3769
3770 static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params,
3771                                             const u8 *rates)
3772 {
3773         int i;
3774
3775         if (!rates)
3776                 return;
3777
3778         for (i = 0; i < rates[1]; i++) {
3779                 if (rates[2 + i] == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
3780                         params->ht_required = true;
3781                 if (rates[2 + i] == BSS_MEMBERSHIP_SELECTOR_VHT_PHY)
3782                         params->vht_required = true;
3783         }
3784 }
3785
3786 /*
3787  * Since the nl80211 API didn't include, from the beginning, attributes about
3788  * HT/VHT requirements/capabilities, we parse them out of the IEs for the
3789  * benefit of drivers that rebuild IEs in the firmware.
3790  */
3791 static void nl80211_calculate_ap_params(struct cfg80211_ap_settings *params)
3792 {
3793         const struct cfg80211_beacon_data *bcn = &params->beacon;
3794         size_t ies_len = bcn->beacon_ies_len;
3795         const u8 *ies = bcn->beacon_ies;
3796         const u8 *rates;
3797         const u8 *cap;
3798
3799         rates = cfg80211_find_ie(WLAN_EID_SUPP_RATES, ies, ies_len);
3800         nl80211_check_ap_rate_selectors(params, rates);
3801
3802         rates = cfg80211_find_ie(WLAN_EID_EXT_SUPP_RATES, ies, ies_len);
3803         nl80211_check_ap_rate_selectors(params, rates);
3804
3805         cap = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, ies, ies_len);
3806         if (cap && cap[1] >= sizeof(*params->ht_cap))
3807                 params->ht_cap = (void *)(cap + 2);
3808         cap = cfg80211_find_ie(WLAN_EID_VHT_CAPABILITY, ies, ies_len);
3809         if (cap && cap[1] >= sizeof(*params->vht_cap))
3810                 params->vht_cap = (void *)(cap + 2);
3811 }
3812
3813 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
3814                                    struct cfg80211_ap_settings *params)
3815 {
3816         struct wireless_dev *wdev;
3817         bool ret = false;
3818
3819         list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3820                 if (wdev->iftype != NL80211_IFTYPE_AP &&
3821                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
3822                         continue;
3823
3824                 if (!wdev->preset_chandef.chan)
3825                         continue;
3826
3827                 params->chandef = wdev->preset_chandef;
3828                 ret = true;
3829                 break;
3830         }
3831
3832         return ret;
3833 }
3834
3835 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
3836                                     enum nl80211_auth_type auth_type,
3837                                     enum nl80211_commands cmd)
3838 {
3839         if (auth_type > NL80211_AUTHTYPE_MAX)
3840                 return false;
3841
3842         switch (cmd) {
3843         case NL80211_CMD_AUTHENTICATE:
3844                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
3845                     auth_type == NL80211_AUTHTYPE_SAE)
3846                         return false;
3847                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
3848                                              NL80211_EXT_FEATURE_FILS_STA) &&
3849                     (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3850                      auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3851                      auth_type == NL80211_AUTHTYPE_FILS_PK))
3852                         return false;
3853                 return true;
3854         case NL80211_CMD_CONNECT:
3855                 /* SAE not supported yet */
3856                 if (auth_type == NL80211_AUTHTYPE_SAE)
3857                         return false;
3858                 /* FILS with SK PFS or PK not supported yet */
3859                 if (auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3860                     auth_type == NL80211_AUTHTYPE_FILS_PK)
3861                         return false;
3862                 if (!wiphy_ext_feature_isset(
3863                             &rdev->wiphy,
3864                             NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
3865                     auth_type == NL80211_AUTHTYPE_FILS_SK)
3866                         return false;
3867                 return true;
3868         case NL80211_CMD_START_AP:
3869                 /* SAE not supported yet */
3870                 if (auth_type == NL80211_AUTHTYPE_SAE)
3871                         return false;
3872                 /* FILS not supported yet */
3873                 if (auth_type == NL80211_AUTHTYPE_FILS_SK ||
3874                     auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
3875                     auth_type == NL80211_AUTHTYPE_FILS_PK)
3876                         return false;
3877                 return true;
3878         default:
3879                 return false;
3880         }
3881 }
3882
3883 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
3884 {
3885         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3886         struct net_device *dev = info->user_ptr[1];
3887         struct wireless_dev *wdev = dev->ieee80211_ptr;
3888         struct cfg80211_ap_settings params;
3889         int err;
3890
3891         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3892             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3893                 return -EOPNOTSUPP;
3894
3895         if (!rdev->ops->start_ap)
3896                 return -EOPNOTSUPP;
3897
3898         if (wdev->beacon_interval)
3899                 return -EALREADY;
3900
3901         memset(&params, 0, sizeof(params));
3902
3903         /* these are required for START_AP */
3904         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3905             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3906             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3907                 return -EINVAL;
3908
3909         err = nl80211_parse_beacon(info->attrs, &params.beacon);
3910         if (err)
3911                 return err;
3912
3913         params.beacon_interval =
3914                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3915         params.dtim_period =
3916                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3917
3918         err = cfg80211_validate_beacon_int(rdev, dev->ieee80211_ptr->iftype,
3919                                            params.beacon_interval);
3920         if (err)
3921                 return err;
3922
3923         /*
3924          * In theory, some of these attributes should be required here
3925          * but since they were not used when the command was originally
3926          * added, keep them optional for old user space programs to let
3927          * them continue to work with drivers that do not need the
3928          * additional information -- drivers must check!
3929          */
3930         if (info->attrs[NL80211_ATTR_SSID]) {
3931                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3932                 params.ssid_len =
3933                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3934                 if (params.ssid_len == 0 ||
3935                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3936                         return -EINVAL;
3937         }
3938
3939         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3940                 params.hidden_ssid = nla_get_u32(
3941                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3942                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3943                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3944                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3945                         return -EINVAL;
3946         }
3947
3948         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3949
3950         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3951                 params.auth_type = nla_get_u32(
3952                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3953                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3954                                              NL80211_CMD_START_AP))
3955                         return -EINVAL;
3956         } else
3957                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3958
3959         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3960                                       NL80211_MAX_NR_CIPHER_SUITES);
3961         if (err)
3962                 return err;
3963
3964         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3965                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3966                         return -EOPNOTSUPP;
3967                 params.inactivity_timeout = nla_get_u16(
3968                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3969         }
3970
3971         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3972                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3973                         return -EINVAL;
3974                 params.p2p_ctwindow =
3975                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3976                 if (params.p2p_ctwindow > 127)
3977                         return -EINVAL;
3978                 if (params.p2p_ctwindow != 0 &&
3979                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3980                         return -EINVAL;
3981         }
3982
3983         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3984                 u8 tmp;
3985
3986                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3987                         return -EINVAL;
3988                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3989                 if (tmp > 1)
3990                         return -EINVAL;
3991                 params.p2p_opp_ps = tmp;
3992                 if (params.p2p_opp_ps != 0 &&
3993                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3994                         return -EINVAL;
3995         }
3996
3997         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3998                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3999                 if (err)
4000                         return err;
4001         } else if (wdev->preset_chandef.chan) {
4002                 params.chandef = wdev->preset_chandef;
4003         } else if (!nl80211_get_ap_channel(rdev, &params))
4004                 return -EINVAL;
4005
4006         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
4007                                            wdev->iftype))
4008                 return -EINVAL;
4009
4010         if (info->attrs[NL80211_ATTR_TX_RATES]) {
4011                 err = nl80211_parse_tx_bitrate_mask(info, &params.beacon_rate);
4012                 if (err)
4013                         return err;
4014
4015                 err = validate_beacon_tx_rate(rdev, params.chandef.chan->band,
4016                                               &params.beacon_rate);
4017                 if (err)
4018                         return err;
4019         }
4020
4021         if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
4022                 params.smps_mode =
4023                         nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
4024                 switch (params.smps_mode) {
4025                 case NL80211_SMPS_OFF:
4026                         break;
4027                 case NL80211_SMPS_STATIC:
4028                         if (!(rdev->wiphy.features &
4029                               NL80211_FEATURE_STATIC_SMPS))
4030                                 return -EINVAL;
4031                         break;
4032                 case NL80211_SMPS_DYNAMIC:
4033                         if (!(rdev->wiphy.features &
4034                               NL80211_FEATURE_DYNAMIC_SMPS))
4035                                 return -EINVAL;
4036                         break;
4037                 default:
4038                         return -EINVAL;
4039                 }
4040         } else {
4041                 params.smps_mode = NL80211_SMPS_OFF;
4042         }
4043
4044         params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
4045         if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ])
4046                 return -EOPNOTSUPP;
4047
4048         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
4049                 params.acl = parse_acl_data(&rdev->wiphy, info);
4050                 if (IS_ERR(params.acl))
4051                         return PTR_ERR(params.acl);
4052         }
4053
4054         nl80211_calculate_ap_params(&params);
4055
4056         wdev_lock(wdev);
4057         err = rdev_start_ap(rdev, dev, &params);
4058         if (!err) {
4059                 wdev->preset_chandef = params.chandef;
4060                 wdev->beacon_interval = params.beacon_interval;
4061                 wdev->chandef = params.chandef;
4062                 wdev->ssid_len = params.ssid_len;
4063                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
4064         }
4065         wdev_unlock(wdev);
4066
4067         kfree(params.acl);
4068
4069         return err;
4070 }
4071
4072 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
4073 {
4074         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4075         struct net_device *dev = info->user_ptr[1];
4076         struct wireless_dev *wdev = dev->ieee80211_ptr;
4077         struct cfg80211_beacon_data params;
4078         int err;
4079
4080         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4081             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4082                 return -EOPNOTSUPP;
4083
4084         if (!rdev->ops->change_beacon)
4085                 return -EOPNOTSUPP;
4086
4087         if (!wdev->beacon_interval)
4088                 return -EINVAL;
4089
4090         err = nl80211_parse_beacon(info->attrs, &params);
4091         if (err)
4092                 return err;
4093
4094         wdev_lock(wdev);
4095         err = rdev_change_beacon(rdev, dev, &params);
4096         wdev_unlock(wdev);
4097
4098         return err;
4099 }
4100
4101 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
4102 {
4103         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4104         struct net_device *dev = info->user_ptr[1];
4105
4106         return cfg80211_stop_ap(rdev, dev, false);
4107 }
4108
4109 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
4110         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
4111         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
4112         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
4113         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
4114         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
4115         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
4116 };
4117
4118 static int parse_station_flags(struct genl_info *info,
4119                                enum nl80211_iftype iftype,
4120                                struct station_parameters *params)
4121 {
4122         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
4123         struct nlattr *nla;
4124         int flag;
4125
4126         /*
4127          * Try parsing the new attribute first so userspace
4128          * can specify both for older kernels.
4129          */
4130         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
4131         if (nla) {
4132                 struct nl80211_sta_flag_update *sta_flags;
4133
4134                 sta_flags = nla_data(nla);
4135                 params->sta_flags_mask = sta_flags->mask;
4136                 params->sta_flags_set = sta_flags->set;
4137                 params->sta_flags_set &= params->sta_flags_mask;
4138                 if ((params->sta_flags_mask |
4139                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
4140                         return -EINVAL;
4141                 return 0;
4142         }
4143
4144         /* if present, parse the old attribute */
4145
4146         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
4147         if (!nla)
4148                 return 0;
4149
4150         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX, nla,
4151                              sta_flags_policy, info->extack))
4152                 return -EINVAL;
4153
4154         /*
4155          * Only allow certain flags for interface types so that
4156          * other attributes are silently ignored. Remember that
4157          * this is backward compatibility code with old userspace
4158          * and shouldn't be hit in other cases anyway.
4159          */
4160         switch (iftype) {
4161         case NL80211_IFTYPE_AP:
4162         case NL80211_IFTYPE_AP_VLAN:
4163         case NL80211_IFTYPE_P2P_GO:
4164                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4165                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4166                                          BIT(NL80211_STA_FLAG_WME) |
4167                                          BIT(NL80211_STA_FLAG_MFP);
4168                 break;
4169         case NL80211_IFTYPE_P2P_CLIENT:
4170         case NL80211_IFTYPE_STATION:
4171                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
4172                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
4173                 break;
4174         case NL80211_IFTYPE_MESH_POINT:
4175                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4176                                          BIT(NL80211_STA_FLAG_MFP) |
4177                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
4178         default:
4179                 return -EINVAL;
4180         }
4181
4182         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
4183                 if (flags[flag]) {
4184                         params->sta_flags_set |= (1<<flag);
4185
4186                         /* no longer support new API additions in old API */
4187                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
4188                                 return -EINVAL;
4189                 }
4190         }
4191
4192         return 0;
4193 }
4194
4195 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
4196                                  int attr)
4197 {
4198         struct nlattr *rate;
4199         u32 bitrate;
4200         u16 bitrate_compat;
4201         enum nl80211_rate_info rate_flg;
4202
4203         rate = nla_nest_start(msg, attr);
4204         if (!rate)
4205                 return false;
4206
4207         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
4208         bitrate = cfg80211_calculate_bitrate(info);
4209         /* report 16-bit bitrate only if we can */
4210         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
4211         if (bitrate > 0 &&
4212             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
4213                 return false;
4214         if (bitrate_compat > 0 &&
4215             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
4216                 return false;
4217
4218         switch (info->bw) {
4219         case RATE_INFO_BW_5:
4220                 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
4221                 break;
4222         case RATE_INFO_BW_10:
4223                 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
4224                 break;
4225         default:
4226                 WARN_ON(1);
4227                 /* fall through */
4228         case RATE_INFO_BW_20:
4229                 rate_flg = 0;
4230                 break;
4231         case RATE_INFO_BW_40:
4232                 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
4233                 break;
4234         case RATE_INFO_BW_80:
4235                 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
4236                 break;
4237         case RATE_INFO_BW_160:
4238                 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
4239                 break;
4240         }
4241
4242         if (rate_flg && nla_put_flag(msg, rate_flg))
4243                 return false;
4244
4245         if (info->flags & RATE_INFO_FLAGS_MCS) {
4246                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
4247                         return false;
4248                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4249                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4250                         return false;
4251         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
4252                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
4253                         return false;
4254                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
4255                         return false;
4256                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
4257                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
4258                         return false;
4259         }
4260
4261         nla_nest_end(msg, rate);
4262         return true;
4263 }
4264
4265 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
4266                                int id)
4267 {
4268         void *attr;
4269         int i = 0;
4270
4271         if (!mask)
4272                 return true;
4273
4274         attr = nla_nest_start(msg, id);
4275         if (!attr)
4276                 return false;
4277
4278         for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
4279                 if (!(mask & BIT(i)))
4280                         continue;
4281
4282                 if (nla_put_u8(msg, i, signal[i]))
4283                         return false;
4284         }
4285
4286         nla_nest_end(msg, attr);
4287
4288         return true;
4289 }
4290
4291 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
4292                                 u32 seq, int flags,
4293                                 struct cfg80211_registered_device *rdev,
4294                                 struct net_device *dev,
4295                                 const u8 *mac_addr, struct station_info *sinfo)
4296 {
4297         void *hdr;
4298         struct nlattr *sinfoattr, *bss_param;
4299
4300         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
4301         if (!hdr)
4302                 return -1;
4303
4304         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4305             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
4306             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
4307                 goto nla_put_failure;
4308
4309         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
4310         if (!sinfoattr)
4311                 goto nla_put_failure;
4312
4313 #define PUT_SINFO(attr, memb, type) do {                                \
4314         BUILD_BUG_ON(sizeof(type) == sizeof(u64));                      \
4315         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4316             nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,            \
4317                              sinfo->memb))                              \
4318                 goto nla_put_failure;                                   \
4319         } while (0)
4320 #define PUT_SINFO_U64(attr, memb) do {                                  \
4321         if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) &&      \
4322             nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,           \
4323                               sinfo->memb, NL80211_STA_INFO_PAD))       \
4324                 goto nla_put_failure;                                   \
4325         } while (0)
4326
4327         PUT_SINFO(CONNECTED_TIME, connected_time, u32);
4328         PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
4329
4330         if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) |
4331                              BIT(NL80211_STA_INFO_RX_BYTES64)) &&
4332             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
4333                         (u32)sinfo->rx_bytes))
4334                 goto nla_put_failure;
4335
4336         if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) |
4337                              BIT(NL80211_STA_INFO_TX_BYTES64)) &&
4338             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
4339                         (u32)sinfo->tx_bytes))
4340                 goto nla_put_failure;
4341
4342         PUT_SINFO_U64(RX_BYTES64, rx_bytes);
4343         PUT_SINFO_U64(TX_BYTES64, tx_bytes);
4344         PUT_SINFO(LLID, llid, u16);
4345         PUT_SINFO(PLID, plid, u16);
4346         PUT_SINFO(PLINK_STATE, plink_state, u8);
4347         PUT_SINFO_U64(RX_DURATION, rx_duration);
4348
4349         switch (rdev->wiphy.signal_type) {
4350         case CFG80211_SIGNAL_TYPE_MBM:
4351                 PUT_SINFO(SIGNAL, signal, u8);
4352                 PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
4353                 break;
4354         default:
4355                 break;
4356         }
4357         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) {
4358                 if (!nl80211_put_signal(msg, sinfo->chains,
4359                                         sinfo->chain_signal,
4360                                         NL80211_STA_INFO_CHAIN_SIGNAL))
4361                         goto nla_put_failure;
4362         }
4363         if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
4364                 if (!nl80211_put_signal(msg, sinfo->chains,
4365                                         sinfo->chain_signal_avg,
4366                                         NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
4367                         goto nla_put_failure;
4368         }
4369         if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) {
4370                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
4371                                           NL80211_STA_INFO_TX_BITRATE))
4372                         goto nla_put_failure;
4373         }
4374         if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) {
4375                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
4376                                           NL80211_STA_INFO_RX_BITRATE))
4377                         goto nla_put_failure;
4378         }
4379
4380         PUT_SINFO(RX_PACKETS, rx_packets, u32);
4381         PUT_SINFO(TX_PACKETS, tx_packets, u32);
4382         PUT_SINFO(TX_RETRIES, tx_retries, u32);
4383         PUT_SINFO(TX_FAILED, tx_failed, u32);
4384         PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
4385         PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
4386         PUT_SINFO(LOCAL_PM, local_pm, u32);
4387         PUT_SINFO(PEER_PM, peer_pm, u32);
4388         PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
4389
4390         if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) {
4391                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
4392                 if (!bss_param)
4393                         goto nla_put_failure;
4394
4395                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
4396                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
4397                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
4398                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
4399                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
4400                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
4401                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
4402                                sinfo->bss_param.dtim_period) ||
4403                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
4404                                 sinfo->bss_param.beacon_interval))
4405                         goto nla_put_failure;
4406
4407                 nla_nest_end(msg, bss_param);
4408         }
4409         if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) &&
4410             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
4411                     sizeof(struct nl80211_sta_flag_update),
4412                     &sinfo->sta_flags))
4413                 goto nla_put_failure;
4414
4415         PUT_SINFO_U64(T_OFFSET, t_offset);
4416         PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
4417         PUT_SINFO_U64(BEACON_RX, rx_beacon);
4418         PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
4419
4420 #undef PUT_SINFO
4421 #undef PUT_SINFO_U64
4422
4423         if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) {
4424                 struct nlattr *tidsattr;
4425                 int tid;
4426
4427                 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS);
4428                 if (!tidsattr)
4429                         goto nla_put_failure;
4430
4431                 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
4432                         struct cfg80211_tid_stats *tidstats;
4433                         struct nlattr *tidattr;
4434
4435                         tidstats = &sinfo->pertid[tid];
4436
4437                         if (!tidstats->filled)
4438                                 continue;
4439
4440                         tidattr = nla_nest_start(msg, tid + 1);
4441                         if (!tidattr)
4442                                 goto nla_put_failure;
4443
4444 #define PUT_TIDVAL_U64(attr, memb) do {                                 \
4445         if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&       \
4446             nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,          \
4447                               tidstats->memb, NL80211_TID_STATS_PAD))   \
4448                 goto nla_put_failure;                                   \
4449         } while (0)
4450
4451                         PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
4452                         PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
4453                         PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
4454                         PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);
4455
4456 #undef PUT_TIDVAL_U64
4457                         nla_nest_end(msg, tidattr);
4458                 }
4459
4460                 nla_nest_end(msg, tidsattr);
4461         }
4462
4463         nla_nest_end(msg, sinfoattr);
4464
4465         if (sinfo->assoc_req_ies_len &&
4466             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
4467                     sinfo->assoc_req_ies))
4468                 goto nla_put_failure;
4469
4470         genlmsg_end(msg, hdr);
4471         return 0;
4472
4473  nla_put_failure:
4474         genlmsg_cancel(msg, hdr);
4475         return -EMSGSIZE;
4476 }
4477
4478 static int nl80211_dump_station(struct sk_buff *skb,
4479                                 struct netlink_callback *cb)
4480 {
4481         struct station_info sinfo;
4482         struct cfg80211_registered_device *rdev;
4483         struct wireless_dev *wdev;
4484         u8 mac_addr[ETH_ALEN];
4485         int sta_idx = cb->args[2];
4486         int err;
4487
4488         rtnl_lock();
4489         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
4490         if (err)
4491                 goto out_err;
4492
4493         if (!wdev->netdev) {
4494                 err = -EINVAL;
4495                 goto out_err;
4496         }
4497
4498         if (!rdev->ops->dump_station) {
4499                 err = -EOPNOTSUPP;
4500                 goto out_err;
4501         }
4502
4503         while (1) {
4504                 memset(&sinfo, 0, sizeof(sinfo));
4505                 err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
4506                                         mac_addr, &sinfo);
4507                 if (err == -ENOENT)
4508                         break;
4509                 if (err)
4510                         goto out_err;
4511
4512                 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
4513                                 NETLINK_CB(cb->skb).portid,
4514                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4515                                 rdev, wdev->netdev, mac_addr,
4516                                 &sinfo) < 0)
4517                         goto out;
4518
4519                 sta_idx++;
4520         }
4521
4522  out:
4523         cb->args[2] = sta_idx;
4524         err = skb->len;
4525  out_err:
4526         rtnl_unlock();
4527
4528         return err;
4529 }
4530
4531 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
4532 {
4533         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4534         struct net_device *dev = info->user_ptr[1];
4535         struct station_info sinfo;
4536         struct sk_buff *msg;
4537         u8 *mac_addr = NULL;
4538         int err;
4539
4540         memset(&sinfo, 0, sizeof(sinfo));
4541
4542         if (!info->attrs[NL80211_ATTR_MAC])
4543                 return -EINVAL;
4544
4545         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4546
4547         if (!rdev->ops->get_station)
4548                 return -EOPNOTSUPP;
4549
4550         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
4551         if (err)
4552                 return err;
4553
4554         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4555         if (!msg)
4556                 return -ENOMEM;
4557
4558         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
4559                                  info->snd_portid, info->snd_seq, 0,
4560                                  rdev, dev, mac_addr, &sinfo) < 0) {
4561                 nlmsg_free(msg);
4562                 return -ENOBUFS;
4563         }
4564
4565         return genlmsg_reply(msg, info);
4566 }
4567
4568 int cfg80211_check_station_change(struct wiphy *wiphy,
4569                                   struct station_parameters *params,
4570                                   enum cfg80211_station_type statype)
4571 {
4572         if (params->listen_interval != -1 &&
4573             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4574                 return -EINVAL;
4575
4576         if (params->support_p2p_ps != -1 &&
4577             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4578                 return -EINVAL;
4579
4580         if (params->aid &&
4581             !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
4582             statype != CFG80211_STA_AP_CLIENT_UNASSOC)
4583                 return -EINVAL;
4584
4585         /* When you run into this, adjust the code below for the new flag */
4586         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
4587
4588         switch (statype) {
4589         case CFG80211_STA_MESH_PEER_KERNEL:
4590         case CFG80211_STA_MESH_PEER_USER:
4591                 /*
4592                  * No ignoring the TDLS flag here -- the userspace mesh
4593                  * code doesn't have the bug of including TDLS in the
4594                  * mask everywhere.
4595                  */
4596                 if (params->sta_flags_mask &
4597                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4598                                   BIT(NL80211_STA_FLAG_MFP) |
4599                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
4600                         return -EINVAL;
4601                 break;
4602         case CFG80211_STA_TDLS_PEER_SETUP:
4603         case CFG80211_STA_TDLS_PEER_ACTIVE:
4604                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4605                         return -EINVAL;
4606                 /* ignore since it can't change */
4607                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4608                 break;
4609         default:
4610                 /* disallow mesh-specific things */
4611                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
4612                         return -EINVAL;
4613                 if (params->local_pm)
4614                         return -EINVAL;
4615                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4616                         return -EINVAL;
4617         }
4618
4619         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4620             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
4621                 /* TDLS can't be set, ... */
4622                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4623                         return -EINVAL;
4624                 /*
4625                  * ... but don't bother the driver with it. This works around
4626                  * a hostapd/wpa_supplicant issue -- it always includes the
4627                  * TLDS_PEER flag in the mask even for AP mode.
4628                  */
4629                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
4630         }
4631
4632         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
4633             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4634                 /* reject other things that can't change */
4635                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
4636                         return -EINVAL;
4637                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
4638                         return -EINVAL;
4639                 if (params->supported_rates)
4640                         return -EINVAL;
4641                 if (params->ext_capab || params->ht_capa || params->vht_capa)
4642                         return -EINVAL;
4643         }
4644
4645         if (statype != CFG80211_STA_AP_CLIENT &&
4646             statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
4647                 if (params->vlan)
4648                         return -EINVAL;
4649         }
4650
4651         switch (statype) {
4652         case CFG80211_STA_AP_MLME_CLIENT:
4653                 /* Use this only for authorizing/unauthorizing a station */
4654                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
4655                         return -EOPNOTSUPP;
4656                 break;
4657         case CFG80211_STA_AP_CLIENT:
4658         case CFG80211_STA_AP_CLIENT_UNASSOC:
4659                 /* accept only the listed bits */
4660                 if (params->sta_flags_mask &
4661                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4662                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4663                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
4664                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
4665                                   BIT(NL80211_STA_FLAG_WME) |
4666                                   BIT(NL80211_STA_FLAG_MFP)))
4667                         return -EINVAL;
4668
4669                 /* but authenticated/associated only if driver handles it */
4670                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
4671                     params->sta_flags_mask &
4672                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
4673                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
4674                         return -EINVAL;
4675                 break;
4676         case CFG80211_STA_IBSS:
4677         case CFG80211_STA_AP_STA:
4678                 /* reject any changes other than AUTHORIZED */
4679                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
4680                         return -EINVAL;
4681                 break;
4682         case CFG80211_STA_TDLS_PEER_SETUP:
4683                 /* reject any changes other than AUTHORIZED or WME */
4684                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
4685                                                BIT(NL80211_STA_FLAG_WME)))
4686                         return -EINVAL;
4687                 /* force (at least) rates when authorizing */
4688                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
4689                     !params->supported_rates)
4690                         return -EINVAL;
4691                 break;
4692         case CFG80211_STA_TDLS_PEER_ACTIVE:
4693                 /* reject any changes */
4694                 return -EINVAL;
4695         case CFG80211_STA_MESH_PEER_KERNEL:
4696                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
4697                         return -EINVAL;
4698                 break;
4699         case CFG80211_STA_MESH_PEER_USER:
4700                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
4701                     params->plink_action != NL80211_PLINK_ACTION_BLOCK)
4702                         return -EINVAL;
4703                 break;
4704         }
4705
4706         /*
4707          * Older kernel versions ignored this attribute entirely, so don't
4708          * reject attempts to update it but mark it as unused instead so the
4709          * driver won't look at the data.
4710          */
4711         if (statype != CFG80211_STA_AP_CLIENT_UNASSOC &&
4712             statype != CFG80211_STA_TDLS_PEER_SETUP)
4713                 params->opmode_notif_used = false;
4714
4715         return 0;
4716 }
4717 EXPORT_SYMBOL(cfg80211_check_station_change);
4718
4719 /*
4720  * Get vlan interface making sure it is running and on the right wiphy.
4721  */
4722 static struct net_device *get_vlan(struct genl_info *info,
4723                                    struct cfg80211_registered_device *rdev)
4724 {
4725         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
4726         struct net_device *v;
4727         int ret;
4728
4729         if (!vlanattr)
4730                 return NULL;
4731
4732         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
4733         if (!v)
4734                 return ERR_PTR(-ENODEV);
4735
4736         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
4737                 ret = -EINVAL;
4738                 goto error;
4739         }
4740
4741         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4742             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4743             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4744                 ret = -EINVAL;
4745                 goto error;
4746         }
4747
4748         if (!netif_running(v)) {
4749                 ret = -ENETDOWN;
4750                 goto error;
4751         }
4752
4753         return v;
4754  error:
4755         dev_put(v);
4756         return ERR_PTR(ret);
4757 }
4758
4759 static const struct nla_policy
4760 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
4761         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
4762         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
4763 };
4764
4765 static int nl80211_parse_sta_wme(struct genl_info *info,
4766                                  struct station_parameters *params)
4767 {
4768         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
4769         struct nlattr *nla;
4770         int err;
4771
4772         /* parse WME attributes if present */
4773         if (!info->attrs[NL80211_ATTR_STA_WME])
4774                 return 0;
4775
4776         nla = info->attrs[NL80211_ATTR_STA_WME];
4777         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
4778                                nl80211_sta_wme_policy, info->extack);
4779         if (err)
4780                 return err;
4781
4782         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
4783                 params->uapsd_queues = nla_get_u8(
4784                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
4785         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
4786                 return -EINVAL;
4787
4788         if (tb[NL80211_STA_WME_MAX_SP])
4789                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
4790
4791         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
4792                 return -EINVAL;
4793
4794         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
4795
4796         return 0;
4797 }
4798
4799 static int nl80211_parse_sta_channel_info(struct genl_info *info,
4800                                       struct station_parameters *params)
4801 {
4802         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
4803                 params->supported_channels =
4804                      nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4805                 params->supported_channels_len =
4806                      nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
4807                 /*
4808                  * Need to include at least one (first channel, number of
4809                  * channels) tuple for each subband, and must have proper
4810                  * tuples for the rest of the data as well.
4811                  */
4812                 if (params->supported_channels_len < 2)
4813                         return -EINVAL;
4814                 if (params->supported_channels_len % 2)
4815                         return -EINVAL;
4816         }
4817
4818         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
4819                 params->supported_oper_classes =
4820                  nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4821                 params->supported_oper_classes_len =
4822                   nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
4823                 /*
4824                  * The value of the Length field of the Supported Operating
4825                  * Classes element is between 2 and 253.
4826                  */
4827                 if (params->supported_oper_classes_len < 2 ||
4828                     params->supported_oper_classes_len > 253)
4829                         return -EINVAL;
4830         }
4831         return 0;
4832 }
4833
4834 static int nl80211_set_station_tdls(struct genl_info *info,
4835                                     struct station_parameters *params)
4836 {
4837         int err;
4838         /* Dummy STA entry gets updated once the peer capabilities are known */
4839         if (info->attrs[NL80211_ATTR_PEER_AID])
4840                 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
4841         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
4842                 params->ht_capa =
4843                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4844         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
4845                 params->vht_capa =
4846                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
4847
4848         err = nl80211_parse_sta_channel_info(info, params);
4849         if (err)
4850                 return err;
4851
4852         return nl80211_parse_sta_wme(info, params);
4853 }
4854
4855 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
4856 {
4857         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4858         struct net_device *dev = info->user_ptr[1];
4859         struct station_parameters params;
4860         u8 *mac_addr;
4861         int err;
4862
4863         memset(&params, 0, sizeof(params));
4864
4865         if (!rdev->ops->change_station)
4866                 return -EOPNOTSUPP;
4867
4868         /*
4869          * AID and listen_interval properties can be set only for unassociated
4870          * station. Include these parameters here and will check them in
4871          * cfg80211_check_station_change().
4872          */
4873         if (info->attrs[NL80211_ATTR_STA_AID])
4874                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
4875
4876         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
4877                 params.listen_interval =
4878                      nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
4879         else
4880                 params.listen_interval = -1;
4881
4882         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
4883                 u8 tmp;
4884
4885                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
4886                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
4887                         return -EINVAL;
4888
4889                 params.support_p2p_ps = tmp;
4890         } else {
4891                 params.support_p2p_ps = -1;
4892         }
4893
4894         if (!info->attrs[NL80211_ATTR_MAC])
4895                 return -EINVAL;
4896
4897         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4898
4899         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
4900                 params.supported_rates =
4901                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4902                 params.supported_rates_len =
4903                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
4904         }
4905
4906         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
4907                 params.capability =
4908                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
4909                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
4910         }
4911
4912         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
4913                 params.ext_capab =
4914                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4915                 params.ext_capab_len =
4916                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
4917         }
4918
4919         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
4920                 return -EINVAL;
4921
4922         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
4923                 params.plink_action =
4924                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
4925                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
4926                         return -EINVAL;
4927         }
4928
4929         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
4930                 params.plink_state =
4931                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
4932                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
4933                         return -EINVAL;
4934                 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) {
4935                         params.peer_aid = nla_get_u16(
4936                                 info->attrs[NL80211_ATTR_MESH_PEER_AID]);
4937                         if (params.peer_aid > IEEE80211_MAX_AID)
4938                                 return -EINVAL;
4939                 }
4940                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
4941         }
4942
4943         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
4944                 enum nl80211_mesh_power_mode pm = nla_get_u32(
4945                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
4946
4947                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
4948                     pm > NL80211_MESH_POWER_MAX)
4949                         return -EINVAL;
4950
4951                 params.local_pm = pm;
4952         }
4953
4954         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
4955                 params.opmode_notif_used = true;
4956                 params.opmode_notif =
4957                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
4958         }
4959
4960         /* Include parameters for TDLS peer (will check later) */
4961         err = nl80211_set_station_tdls(info, &params);
4962         if (err)
4963                 return err;
4964
4965         params.vlan = get_vlan(info, rdev);
4966         if (IS_ERR(params.vlan))
4967                 return PTR_ERR(params.vlan);
4968
4969         switch (dev->ieee80211_ptr->iftype) {
4970         case NL80211_IFTYPE_AP:
4971         case NL80211_IFTYPE_AP_VLAN:
4972         case NL80211_IFTYPE_P2P_GO:
4973         case NL80211_IFTYPE_P2P_CLIENT:
4974         case NL80211_IFTYPE_STATION:
4975         case NL80211_IFTYPE_ADHOC:
4976         case NL80211_IFTYPE_MESH_POINT:
4977                 break;
4978         default:
4979                 err = -EOPNOTSUPP;
4980                 goto out_put_vlan;
4981         }
4982
4983         /* driver will call cfg80211_check_station_change() */
4984         err = rdev_change_station(rdev, dev, mac_addr, &params);
4985
4986  out_put_vlan:
4987         if (params.vlan)
4988                 dev_put(params.vlan);
4989
4990         return err;
4991 }
4992
4993 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
4994 {
4995         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4996         int err;
4997         struct net_device *dev = info->user_ptr[1];
4998         struct station_parameters params;
4999         u8 *mac_addr = NULL;
5000         u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
5001                          BIT(NL80211_STA_FLAG_ASSOCIATED);
5002
5003         memset(&params, 0, sizeof(params));
5004
5005         if (!rdev->ops->add_station)
5006                 return -EOPNOTSUPP;
5007
5008         if (!info->attrs[NL80211_ATTR_MAC])
5009                 return -EINVAL;
5010
5011         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
5012                 return -EINVAL;
5013
5014         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
5015                 return -EINVAL;
5016
5017         if (!info->attrs[NL80211_ATTR_STA_AID] &&
5018             !info->attrs[NL80211_ATTR_PEER_AID])
5019                 return -EINVAL;
5020
5021         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
5022         params.supported_rates =
5023                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
5024         params.supported_rates_len =
5025                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
5026         params.listen_interval =
5027                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
5028
5029         if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
5030                 u8 tmp;
5031
5032                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
5033                 if (tmp >= NUM_NL80211_P2P_PS_STATUS)
5034                         return -EINVAL;
5035
5036                 params.support_p2p_ps = tmp;
5037         } else {
5038                 /*
5039                  * if not specified, assume it's supported for P2P GO interface,
5040                  * and is NOT supported for AP interface
5041                  */
5042                 params.support_p2p_ps =
5043                         dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
5044         }
5045
5046         if (info->attrs[NL80211_ATTR_PEER_AID])
5047                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
5048         else
5049                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
5050         if (!params.aid || params.aid > IEEE80211_MAX_AID)
5051                 return -EINVAL;
5052
5053         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
5054                 params.capability =
5055                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
5056                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
5057         }
5058
5059         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
5060                 params.ext_capab =
5061                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
5062                 params.ext_capab_len =
5063                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
5064         }
5065
5066         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
5067                 params.ht_capa =
5068                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5069
5070         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
5071                 params.vht_capa =
5072                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
5073
5074         if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
5075                 params.opmode_notif_used = true;
5076                 params.opmode_notif =
5077                         nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
5078         }
5079
5080         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
5081                 params.plink_action =
5082                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
5083                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
5084                         return -EINVAL;
5085         }
5086
5087         err = nl80211_parse_sta_channel_info(info, &params);
5088         if (err)
5089                 return err;
5090
5091         err = nl80211_parse_sta_wme(info, &params);
5092         if (err)
5093                 return err;
5094
5095         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
5096                 return -EINVAL;
5097
5098         /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
5099          * as userspace might just pass through the capabilities from the IEs
5100          * directly, rather than enforcing this restriction and returning an
5101          * error in this case.
5102          */
5103         if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
5104                 params.ht_capa = NULL;
5105                 params.vht_capa = NULL;
5106         }
5107
5108         /* When you run into this, adjust the code below for the new flag */
5109         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
5110
5111         switch (dev->ieee80211_ptr->iftype) {
5112         case NL80211_IFTYPE_AP:
5113         case NL80211_IFTYPE_AP_VLAN:
5114         case NL80211_IFTYPE_P2P_GO:
5115                 /* ignore WME attributes if iface/sta is not capable */
5116                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
5117                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
5118                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5119
5120                 /* TDLS peers cannot be added */
5121                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5122                     info->attrs[NL80211_ATTR_PEER_AID])
5123                         return -EINVAL;
5124                 /* but don't bother the driver with it */
5125                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
5126
5127                 /* allow authenticated/associated only if driver handles it */
5128                 if (!(rdev->wiphy.features &
5129                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
5130                     params.sta_flags_mask & auth_assoc)
5131                         return -EINVAL;
5132
5133                 /* Older userspace, or userspace wanting to be compatible with
5134                  * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
5135                  * and assoc flags in the mask, but assumes the station will be
5136                  * added as associated anyway since this was the required driver
5137                  * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
5138                  * introduced.
5139                  * In order to not bother drivers with this quirk in the API
5140                  * set the flags in both the mask and set for new stations in
5141                  * this case.
5142                  */
5143                 if (!(params.sta_flags_mask & auth_assoc)) {
5144                         params.sta_flags_mask |= auth_assoc;
5145                         params.sta_flags_set |= auth_assoc;
5146                 }
5147
5148                 /* must be last in here for error handling */
5149                 params.vlan = get_vlan(info, rdev);
5150                 if (IS_ERR(params.vlan))
5151                         return PTR_ERR(params.vlan);
5152                 break;
5153         case NL80211_IFTYPE_MESH_POINT:
5154                 /* ignore uAPSD data */
5155                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5156
5157                 /* associated is disallowed */
5158                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
5159                         return -EINVAL;
5160                 /* TDLS peers cannot be added */
5161                 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
5162                     info->attrs[NL80211_ATTR_PEER_AID])
5163                         return -EINVAL;
5164                 break;
5165         case NL80211_IFTYPE_STATION:
5166         case NL80211_IFTYPE_P2P_CLIENT:
5167                 /* ignore uAPSD data */
5168                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
5169
5170                 /* these are disallowed */
5171                 if (params.sta_flags_mask &
5172                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
5173                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
5174                         return -EINVAL;
5175                 /* Only TDLS peers can be added */
5176                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
5177                         return -EINVAL;
5178                 /* Can only add if TDLS ... */
5179                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
5180                         return -EOPNOTSUPP;
5181                 /* ... with external setup is supported */
5182                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
5183                         return -EOPNOTSUPP;
5184                 /*
5185                  * Older wpa_supplicant versions always mark the TDLS peer
5186                  * as authorized, but it shouldn't yet be.
5187                  */
5188                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
5189                 break;
5190         default:
5191                 return -EOPNOTSUPP;
5192         }
5193
5194         /* be aware of params.vlan when changing code here */
5195
5196         err = rdev_add_station(rdev, dev, mac_addr, &params);
5197
5198         if (params.vlan)
5199                 dev_put(params.vlan);
5200         return err;
5201 }
5202
5203 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
5204 {
5205         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5206         struct net_device *dev = info->user_ptr[1];
5207         struct station_del_parameters params;
5208
5209         memset(&params, 0, sizeof(params));
5210
5211         if (info->attrs[NL80211_ATTR_MAC])
5212                 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
5213
5214         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5215             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5216             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5217             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5218                 return -EINVAL;
5219
5220         if (!rdev->ops->del_station)
5221                 return -EOPNOTSUPP;
5222
5223         if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
5224                 params.subtype =
5225                         nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
5226                 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
5227                     params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
5228                         return -EINVAL;
5229         } else {
5230                 /* Default to Deauthentication frame */
5231                 params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
5232         }
5233
5234         if (info->attrs[NL80211_ATTR_REASON_CODE]) {
5235                 params.reason_code =
5236                         nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5237                 if (params.reason_code == 0)
5238                         return -EINVAL; /* 0 is reserved */
5239         } else {
5240                 /* Default to reason code 2 */
5241                 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
5242         }
5243
5244         return rdev_del_station(rdev, dev, &params);
5245 }
5246
5247 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
5248                                 int flags, struct net_device *dev,
5249                                 u8 *dst, u8 *next_hop,
5250                                 struct mpath_info *pinfo)
5251 {
5252         void *hdr;
5253         struct nlattr *pinfoattr;
5254
5255         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
5256         if (!hdr)
5257                 return -1;
5258
5259         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5260             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
5261             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
5262             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
5263                 goto nla_put_failure;
5264
5265         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
5266         if (!pinfoattr)
5267                 goto nla_put_failure;
5268         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
5269             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
5270                         pinfo->frame_qlen))
5271                 goto nla_put_failure;
5272         if (((pinfo->filled & MPATH_INFO_SN) &&
5273              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
5274             ((pinfo->filled & MPATH_INFO_METRIC) &&
5275              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
5276                          pinfo->metric)) ||
5277             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
5278              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
5279                          pinfo->exptime)) ||
5280             ((pinfo->filled & MPATH_INFO_FLAGS) &&
5281              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
5282                         pinfo->flags)) ||
5283             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
5284              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
5285                          pinfo->discovery_timeout)) ||
5286             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
5287              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
5288                         pinfo->discovery_retries)))
5289                 goto nla_put_failure;
5290
5291         nla_nest_end(msg, pinfoattr);
5292
5293         genlmsg_end(msg, hdr);
5294         return 0;
5295
5296  nla_put_failure:
5297         genlmsg_cancel(msg, hdr);
5298         return -EMSGSIZE;
5299 }
5300
5301 static int nl80211_dump_mpath(struct sk_buff *skb,
5302                               struct netlink_callback *cb)
5303 {
5304         struct mpath_info pinfo;
5305         struct cfg80211_registered_device *rdev;
5306         struct wireless_dev *wdev;
5307         u8 dst[ETH_ALEN];
5308         u8 next_hop[ETH_ALEN];
5309         int path_idx = cb->args[2];
5310         int err;
5311
5312         rtnl_lock();
5313         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5314         if (err)
5315                 goto out_err;
5316
5317         if (!rdev->ops->dump_mpath) {
5318                 err = -EOPNOTSUPP;
5319                 goto out_err;
5320         }
5321
5322         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5323                 err = -EOPNOTSUPP;
5324                 goto out_err;
5325         }
5326
5327         while (1) {
5328                 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
5329                                       next_hop, &pinfo);
5330                 if (err == -ENOENT)
5331                         break;
5332                 if (err)
5333                         goto out_err;
5334
5335                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5336                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5337                                        wdev->netdev, dst, next_hop,
5338                                        &pinfo) < 0)
5339                         goto out;
5340
5341                 path_idx++;
5342         }
5343
5344  out:
5345         cb->args[2] = path_idx;
5346         err = skb->len;
5347  out_err:
5348         rtnl_unlock();
5349         return err;
5350 }
5351
5352 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
5353 {
5354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5355         int err;
5356         struct net_device *dev = info->user_ptr[1];
5357         struct mpath_info pinfo;
5358         struct sk_buff *msg;
5359         u8 *dst = NULL;
5360         u8 next_hop[ETH_ALEN];
5361
5362         memset(&pinfo, 0, sizeof(pinfo));
5363
5364         if (!info->attrs[NL80211_ATTR_MAC])
5365                 return -EINVAL;
5366
5367         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5368
5369         if (!rdev->ops->get_mpath)
5370                 return -EOPNOTSUPP;
5371
5372         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5373                 return -EOPNOTSUPP;
5374
5375         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
5376         if (err)
5377                 return err;
5378
5379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5380         if (!msg)
5381                 return -ENOMEM;
5382
5383         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5384                                  dev, dst, next_hop, &pinfo) < 0) {
5385                 nlmsg_free(msg);
5386                 return -ENOBUFS;
5387         }
5388
5389         return genlmsg_reply(msg, info);
5390 }
5391
5392 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
5393 {
5394         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5395         struct net_device *dev = info->user_ptr[1];
5396         u8 *dst = NULL;
5397         u8 *next_hop = NULL;
5398
5399         if (!info->attrs[NL80211_ATTR_MAC])
5400                 return -EINVAL;
5401
5402         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5403                 return -EINVAL;
5404
5405         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5406         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5407
5408         if (!rdev->ops->change_mpath)
5409                 return -EOPNOTSUPP;
5410
5411         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5412                 return -EOPNOTSUPP;
5413
5414         return rdev_change_mpath(rdev, dev, dst, next_hop);
5415 }
5416
5417 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
5418 {
5419         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5420         struct net_device *dev = info->user_ptr[1];
5421         u8 *dst = NULL;
5422         u8 *next_hop = NULL;
5423
5424         if (!info->attrs[NL80211_ATTR_MAC])
5425                 return -EINVAL;
5426
5427         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
5428                 return -EINVAL;
5429
5430         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5431         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
5432
5433         if (!rdev->ops->add_mpath)
5434                 return -EOPNOTSUPP;
5435
5436         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5437                 return -EOPNOTSUPP;
5438
5439         return rdev_add_mpath(rdev, dev, dst, next_hop);
5440 }
5441
5442 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
5443 {
5444         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5445         struct net_device *dev = info->user_ptr[1];
5446         u8 *dst = NULL;
5447
5448         if (info->attrs[NL80211_ATTR_MAC])
5449                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5450
5451         if (!rdev->ops->del_mpath)
5452                 return -EOPNOTSUPP;
5453
5454         return rdev_del_mpath(rdev, dev, dst);
5455 }
5456
5457 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
5458 {
5459         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5460         int err;
5461         struct net_device *dev = info->user_ptr[1];
5462         struct mpath_info pinfo;
5463         struct sk_buff *msg;
5464         u8 *dst = NULL;
5465         u8 mpp[ETH_ALEN];
5466
5467         memset(&pinfo, 0, sizeof(pinfo));
5468
5469         if (!info->attrs[NL80211_ATTR_MAC])
5470                 return -EINVAL;
5471
5472         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
5473
5474         if (!rdev->ops->get_mpp)
5475                 return -EOPNOTSUPP;
5476
5477         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5478                 return -EOPNOTSUPP;
5479
5480         err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
5481         if (err)
5482                 return err;
5483
5484         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5485         if (!msg)
5486                 return -ENOMEM;
5487
5488         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
5489                                dev, dst, mpp, &pinfo) < 0) {
5490                 nlmsg_free(msg);
5491                 return -ENOBUFS;
5492         }
5493
5494         return genlmsg_reply(msg, info);
5495 }
5496
5497 static int nl80211_dump_mpp(struct sk_buff *skb,
5498                             struct netlink_callback *cb)
5499 {
5500         struct mpath_info pinfo;
5501         struct cfg80211_registered_device *rdev;
5502         struct wireless_dev *wdev;
5503         u8 dst[ETH_ALEN];
5504         u8 mpp[ETH_ALEN];
5505         int path_idx = cb->args[2];
5506         int err;
5507
5508         rtnl_lock();
5509         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
5510         if (err)
5511                 goto out_err;
5512
5513         if (!rdev->ops->dump_mpp) {
5514                 err = -EOPNOTSUPP;
5515                 goto out_err;
5516         }
5517
5518         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
5519                 err = -EOPNOTSUPP;
5520                 goto out_err;
5521         }
5522
5523         while (1) {
5524                 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
5525                                     mpp, &pinfo);
5526                 if (err == -ENOENT)
5527                         break;
5528                 if (err)
5529                         goto out_err;
5530
5531                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
5532                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
5533                                        wdev->netdev, dst, mpp,
5534                                        &pinfo) < 0)
5535                         goto out;
5536
5537                 path_idx++;
5538         }
5539
5540  out:
5541         cb->args[2] = path_idx;
5542         err = skb->len;
5543  out_err:
5544         rtnl_unlock();
5545         return err;
5546 }
5547
5548 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
5549 {
5550         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5551         struct net_device *dev = info->user_ptr[1];
5552         struct wireless_dev *wdev = dev->ieee80211_ptr;
5553         struct bss_parameters params;
5554         int err;
5555
5556         memset(&params, 0, sizeof(params));
5557         /* default to not changing parameters */
5558         params.use_cts_prot = -1;
5559         params.use_short_preamble = -1;
5560         params.use_short_slot_time = -1;
5561         params.ap_isolate = -1;
5562         params.ht_opmode = -1;
5563         params.p2p_ctwindow = -1;
5564         params.p2p_opp_ps = -1;
5565
5566         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
5567                 params.use_cts_prot =
5568                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
5569         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
5570                 params.use_short_preamble =
5571                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
5572         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
5573                 params.use_short_slot_time =
5574                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
5575         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5576                 params.basic_rates =
5577                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5578                 params.basic_rates_len =
5579                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5580         }
5581         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
5582                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
5583         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
5584                 params.ht_opmode =
5585                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
5586
5587         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
5588                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5589                         return -EINVAL;
5590                 params.p2p_ctwindow =
5591                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
5592                 if (params.p2p_ctwindow < 0)
5593                         return -EINVAL;
5594                 if (params.p2p_ctwindow != 0 &&
5595                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
5596                         return -EINVAL;
5597         }
5598
5599         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
5600                 u8 tmp;
5601
5602                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5603                         return -EINVAL;
5604                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
5605                 if (tmp > 1)
5606                         return -EINVAL;
5607                 params.p2p_opp_ps = tmp;
5608                 if (params.p2p_opp_ps &&
5609                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
5610                         return -EINVAL;
5611         }
5612
5613         if (!rdev->ops->change_bss)
5614                 return -EOPNOTSUPP;
5615
5616         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5617             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5618                 return -EOPNOTSUPP;
5619
5620         wdev_lock(wdev);
5621         err = rdev_change_bss(rdev, dev, &params);
5622         wdev_unlock(wdev);
5623
5624         return err;
5625 }
5626
5627 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
5628 {
5629         char *data = NULL;
5630         bool is_indoor;
5631         enum nl80211_user_reg_hint_type user_reg_hint_type;
5632         u32 owner_nlportid;
5633
5634         /*
5635          * You should only get this when cfg80211 hasn't yet initialized
5636          * completely when built-in to the kernel right between the time
5637          * window between nl80211_init() and regulatory_init(), if that is
5638          * even possible.
5639          */
5640         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
5641                 return -EINPROGRESS;
5642
5643         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
5644                 user_reg_hint_type =
5645                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
5646         else
5647                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
5648
5649         switch (user_reg_hint_type) {
5650         case NL80211_USER_REG_HINT_USER:
5651         case NL80211_USER_REG_HINT_CELL_BASE:
5652                 if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
5653                         return -EINVAL;
5654
5655                 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
5656                 return regulatory_hint_user(data, user_reg_hint_type);
5657         case NL80211_USER_REG_HINT_INDOOR:
5658                 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
5659                         owner_nlportid = info->snd_portid;
5660                         is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
5661                 } else {
5662                         owner_nlportid = 0;
5663                         is_indoor = true;
5664                 }
5665
5666                 return regulatory_hint_indoor(is_indoor, owner_nlportid);
5667         default:
5668                 return -EINVAL;
5669         }
5670 }
5671
5672 static int nl80211_get_mesh_config(struct sk_buff *skb,
5673                                    struct genl_info *info)
5674 {
5675         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5676         struct net_device *dev = info->user_ptr[1];
5677         struct wireless_dev *wdev = dev->ieee80211_ptr;
5678         struct mesh_config cur_params;
5679         int err = 0;
5680         void *hdr;
5681         struct nlattr *pinfoattr;
5682         struct sk_buff *msg;
5683
5684         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
5685                 return -EOPNOTSUPP;
5686
5687         if (!rdev->ops->get_mesh_config)
5688                 return -EOPNOTSUPP;
5689
5690         wdev_lock(wdev);
5691         /* If not connected, get default parameters */
5692         if (!wdev->mesh_id_len)
5693                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
5694         else
5695                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
5696         wdev_unlock(wdev);
5697
5698         if (err)
5699                 return err;
5700
5701         /* Draw up a netlink message to send back */
5702         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5703         if (!msg)
5704                 return -ENOMEM;
5705         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
5706                              NL80211_CMD_GET_MESH_CONFIG);
5707         if (!hdr)
5708                 goto out;
5709         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
5710         if (!pinfoattr)
5711                 goto nla_put_failure;
5712         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
5713             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
5714                         cur_params.dot11MeshRetryTimeout) ||
5715             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5716                         cur_params.dot11MeshConfirmTimeout) ||
5717             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
5718                         cur_params.dot11MeshHoldingTimeout) ||
5719             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
5720                         cur_params.dot11MeshMaxPeerLinks) ||
5721             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
5722                        cur_params.dot11MeshMaxRetries) ||
5723             nla_put_u8(msg, NL80211_MESHCONF_TTL,
5724                        cur_params.dot11MeshTTL) ||
5725             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
5726                        cur_params.element_ttl) ||
5727             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5728                        cur_params.auto_open_plinks) ||
5729             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5730                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
5731             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5732                        cur_params.dot11MeshHWMPmaxPREQretries) ||
5733             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
5734                         cur_params.path_refresh_time) ||
5735             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5736                         cur_params.min_discovery_timeout) ||
5737             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5738                         cur_params.dot11MeshHWMPactivePathTimeout) ||
5739             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5740                         cur_params.dot11MeshHWMPpreqMinInterval) ||
5741             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5742                         cur_params.dot11MeshHWMPperrMinInterval) ||
5743             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5744                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
5745             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
5746                        cur_params.dot11MeshHWMPRootMode) ||
5747             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5748                         cur_params.dot11MeshHWMPRannInterval) ||
5749             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5750                        cur_params.dot11MeshGateAnnouncementProtocol) ||
5751             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
5752                        cur_params.dot11MeshForwarding) ||
5753             nla_put_s32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
5754                         cur_params.rssi_threshold) ||
5755             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
5756                         cur_params.ht_opmode) ||
5757             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
5758                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
5759             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
5760                         cur_params.dot11MeshHWMProotInterval) ||
5761             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
5762                         cur_params.dot11MeshHWMPconfirmationInterval) ||
5763             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
5764                         cur_params.power_mode) ||
5765             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
5766                         cur_params.dot11MeshAwakeWindowDuration) ||
5767             nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
5768                         cur_params.plink_timeout))
5769                 goto nla_put_failure;
5770         nla_nest_end(msg, pinfoattr);
5771         genlmsg_end(msg, hdr);
5772         return genlmsg_reply(msg, info);
5773
5774  nla_put_failure:
5775         genlmsg_cancel(msg, hdr);
5776  out:
5777         nlmsg_free(msg);
5778         return -ENOBUFS;
5779 }
5780
5781 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
5782         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
5783         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
5784         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
5785         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
5786         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
5787         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
5788         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
5789         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
5790         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
5791         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
5792         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
5793         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
5794         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
5795         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
5796         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
5797         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
5798         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
5799         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
5800         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
5801         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
5802         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
5803         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
5804         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
5805         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
5806         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
5807         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
5808         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
5809         [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
5810 };
5811
5812 static const struct nla_policy
5813         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
5814         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
5815         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
5816         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
5817         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
5818         [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
5819         [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
5820         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
5821                                     .len = IEEE80211_MAX_DATA_LEN },
5822         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
5823 };
5824
5825 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out)
5826 {
5827         u8 val = nla_get_u8(nla);
5828         if (val < min || val > max)
5829                 return -EINVAL;
5830         *out = val;
5831         return 0;
5832 }
5833
5834 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out)
5835 {
5836         u8 val = nla_get_u8(nla);
5837         if (val < min || val > max)
5838                 return -EINVAL;
5839         *out = val;
5840         return 0;
5841 }
5842
5843 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out)
5844 {
5845         u16 val = nla_get_u16(nla);
5846         if (val < min || val > max)
5847                 return -EINVAL;
5848         *out = val;
5849         return 0;
5850 }
5851
5852 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out)
5853 {
5854         u32 val = nla_get_u32(nla);
5855         if (val < min || val > max)
5856                 return -EINVAL;
5857         *out = val;
5858         return 0;
5859 }
5860
5861 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out)
5862 {
5863         s32 val = nla_get_s32(nla);
5864         if (val < min || val > max)
5865                 return -EINVAL;
5866         *out = val;
5867         return 0;
5868 }
5869
5870 static int nl80211_check_power_mode(const struct nlattr *nla,
5871                                     enum nl80211_mesh_power_mode min,
5872                                     enum nl80211_mesh_power_mode max,
5873                                     enum nl80211_mesh_power_mode *out)
5874 {
5875         u32 val = nla_get_u32(nla);
5876         if (val < min || val > max)
5877                 return -EINVAL;
5878         *out = val;
5879         return 0;
5880 }
5881
5882 static int nl80211_parse_mesh_config(struct genl_info *info,
5883                                      struct mesh_config *cfg,
5884                                      u32 *mask_out)
5885 {
5886         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
5887         u32 mask = 0;
5888         u16 ht_opmode;
5889
5890 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
5891 do {                                                                        \
5892         if (tb[attr]) {                                                     \
5893                 if (fn(tb[attr], min, max, &cfg->param))                    \
5894                         return -EINVAL;                                     \
5895                 mask |= (1 << (attr - 1));                                  \
5896         }                                                                   \
5897 } while (0)
5898
5899         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
5900                 return -EINVAL;
5901         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
5902                              info->attrs[NL80211_ATTR_MESH_CONFIG],
5903                              nl80211_meshconf_params_policy, info->extack))
5904                 return -EINVAL;
5905
5906         /* This makes sure that there aren't more than 32 mesh config
5907          * parameters (otherwise our bitfield scheme would not work.) */
5908         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
5909
5910         /* Fill in the params struct */
5911         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
5912                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
5913                                   nl80211_check_u16);
5914         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
5915                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
5916                                   nl80211_check_u16);
5917         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
5918                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
5919                                   nl80211_check_u16);
5920         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
5921                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
5922                                   nl80211_check_u16);
5923         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
5924                                   mask, NL80211_MESHCONF_MAX_RETRIES,
5925                                   nl80211_check_u8);
5926         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
5927                                   mask, NL80211_MESHCONF_TTL, nl80211_check_u8);
5928         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
5929                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
5930                                   nl80211_check_u8);
5931         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
5932                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
5933                                   nl80211_check_bool);
5934         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
5935                                   1, 255, mask,
5936                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
5937                                   nl80211_check_u32);
5938         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
5939                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
5940                                   nl80211_check_u8);
5941         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
5942                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
5943                                   nl80211_check_u32);
5944         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
5945                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
5946                                   nl80211_check_u16);
5947         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
5948                                   1, 65535, mask,
5949                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
5950                                   nl80211_check_u32);
5951         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
5952                                   1, 65535, mask,
5953                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
5954                                   nl80211_check_u16);
5955         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
5956                                   1, 65535, mask,
5957                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
5958                                   nl80211_check_u16);
5959         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5960                                   dot11MeshHWMPnetDiameterTraversalTime,
5961                                   1, 65535, mask,
5962                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
5963                                   nl80211_check_u16);
5964         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
5965                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
5966                                   nl80211_check_u8);
5967         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
5968                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
5969                                   nl80211_check_u16);
5970         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
5971                                   dot11MeshGateAnnouncementProtocol, 0, 1,
5972                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
5973                                   nl80211_check_bool);
5974         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
5975                                   mask, NL80211_MESHCONF_FORWARDING,
5976                                   nl80211_check_bool);
5977         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0,
5978                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
5979                                   nl80211_check_s32);
5980         /*
5981          * Check HT operation mode based on
5982          * IEEE 802.11 2012 8.4.2.59 HT Operation element.
5983          */
5984         if (tb[NL80211_MESHCONF_HT_OPMODE]) {
5985                 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);
5986
5987                 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
5988                                   IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
5989                                   IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5990                         return -EINVAL;
5991
5992                 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) &&
5993                     (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
5994                         return -EINVAL;
5995
5996                 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) {
5997                 case IEEE80211_HT_OP_MODE_PROTECTION_NONE:
5998                 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
5999                         if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)
6000                                 return -EINVAL;
6001                         break;
6002                 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
6003                 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
6004                         if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
6005                                 return -EINVAL;
6006                         break;
6007                 }
6008                 cfg->ht_opmode = ht_opmode;
6009                 mask |= (1 << (NL80211_MESHCONF_HT_OPMODE - 1));
6010         }
6011         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
6012                                   1, 65535, mask,
6013                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
6014                                   nl80211_check_u32);
6015         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
6016                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
6017                                   nl80211_check_u16);
6018         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
6019                                   dot11MeshHWMPconfirmationInterval,
6020                                   1, 65535, mask,
6021                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
6022                                   nl80211_check_u16);
6023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
6024                                   NL80211_MESH_POWER_ACTIVE,
6025                                   NL80211_MESH_POWER_MAX,
6026                                   mask, NL80211_MESHCONF_POWER_MODE,
6027                                   nl80211_check_power_mode);
6028         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
6029                                   0, 65535, mask,
6030                                   NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16);
6031         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff,
6032                                   mask, NL80211_MESHCONF_PLINK_TIMEOUT,
6033                                   nl80211_check_u32);
6034         if (mask_out)
6035                 *mask_out = mask;
6036
6037         return 0;
6038
6039 #undef FILL_IN_MESH_PARAM_IF_SET
6040 }
6041
6042 static int nl80211_parse_mesh_setup(struct genl_info *info,
6043                                      struct mesh_setup *setup)
6044 {
6045         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6046         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
6047
6048         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
6049                 return -EINVAL;
6050         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
6051                              info->attrs[NL80211_ATTR_MESH_SETUP],
6052                              nl80211_mesh_setup_params_policy, info->extack))
6053                 return -EINVAL;
6054
6055         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
6056                 setup->sync_method =
6057                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
6058                  IEEE80211_SYNC_METHOD_VENDOR :
6059                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
6060
6061         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
6062                 setup->path_sel_proto =
6063                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
6064                  IEEE80211_PATH_PROTOCOL_VENDOR :
6065                  IEEE80211_PATH_PROTOCOL_HWMP;
6066
6067         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
6068                 setup->path_metric =
6069                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
6070                  IEEE80211_PATH_METRIC_VENDOR :
6071                  IEEE80211_PATH_METRIC_AIRTIME;
6072
6073         if (tb[NL80211_MESH_SETUP_IE]) {
6074                 struct nlattr *ieattr =
6075                         tb[NL80211_MESH_SETUP_IE];
6076                 if (!is_valid_ie_attr(ieattr))
6077                         return -EINVAL;
6078                 setup->ie = nla_data(ieattr);
6079                 setup->ie_len = nla_len(ieattr);
6080         }
6081         if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
6082             !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
6083                 return -EINVAL;
6084         setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
6085         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
6086         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
6087         if (setup->is_secure)
6088                 setup->user_mpm = true;
6089
6090         if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
6091                 if (!setup->user_mpm)
6092                         return -EINVAL;
6093                 setup->auth_id =
6094                         nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
6095         }
6096
6097         return 0;
6098 }
6099
6100 static int nl80211_update_mesh_config(struct sk_buff *skb,
6101                                       struct genl_info *info)
6102 {
6103         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6104         struct net_device *dev = info->user_ptr[1];
6105         struct wireless_dev *wdev = dev->ieee80211_ptr;
6106         struct mesh_config cfg;
6107         u32 mask;
6108         int err;
6109
6110         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
6111                 return -EOPNOTSUPP;
6112
6113         if (!rdev->ops->update_mesh_config)
6114                 return -EOPNOTSUPP;
6115
6116         err = nl80211_parse_mesh_config(info, &cfg, &mask);
6117         if (err)
6118                 return err;
6119
6120         wdev_lock(wdev);
6121         if (!wdev->mesh_id_len)
6122                 err = -ENOLINK;
6123
6124         if (!err)
6125                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
6126
6127         wdev_unlock(wdev);
6128
6129         return err;
6130 }
6131
6132 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
6133                               struct sk_buff *msg)
6134 {
6135         struct nlattr *nl_reg_rules;
6136         unsigned int i;
6137
6138         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
6139             (regdom->dfs_region &&
6140              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
6141                 goto nla_put_failure;
6142
6143         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
6144         if (!nl_reg_rules)
6145                 goto nla_put_failure;
6146
6147         for (i = 0; i < regdom->n_reg_rules; i++) {
6148                 struct nlattr *nl_reg_rule;
6149                 const struct ieee80211_reg_rule *reg_rule;
6150                 const struct ieee80211_freq_range *freq_range;
6151                 const struct ieee80211_power_rule *power_rule;
6152                 unsigned int max_bandwidth_khz;
6153
6154                 reg_rule = &regdom->reg_rules[i];
6155                 freq_range = &reg_rule->freq_range;
6156                 power_rule = &reg_rule->power_rule;
6157
6158                 nl_reg_rule = nla_nest_start(msg, i);
6159                 if (!nl_reg_rule)
6160                         goto nla_put_failure;
6161
6162                 max_bandwidth_khz = freq_range->max_bandwidth_khz;
6163                 if (!max_bandwidth_khz)
6164                         max_bandwidth_khz = reg_get_max_bandwidth(regdom,
6165                                                                   reg_rule);
6166
6167                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
6168                                 reg_rule->flags) ||
6169                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
6170                                 freq_range->start_freq_khz) ||
6171                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
6172                                 freq_range->end_freq_khz) ||
6173                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
6174                                 max_bandwidth_khz) ||
6175                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
6176                                 power_rule->max_antenna_gain) ||
6177                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
6178                                 power_rule->max_eirp) ||
6179                     nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
6180                                 reg_rule->dfs_cac_ms))
6181                         goto nla_put_failure;
6182
6183                 nla_nest_end(msg, nl_reg_rule);
6184         }
6185
6186         nla_nest_end(msg, nl_reg_rules);
6187         return 0;
6188
6189 nla_put_failure:
6190         return -EMSGSIZE;
6191 }
6192
6193 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
6194 {
6195         const struct ieee80211_regdomain *regdom = NULL;
6196         struct cfg80211_registered_device *rdev;
6197         struct wiphy *wiphy = NULL;
6198         struct sk_buff *msg;
6199         void *hdr;
6200
6201         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6202         if (!msg)
6203                 return -ENOBUFS;
6204
6205         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6206                              NL80211_CMD_GET_REG);
6207         if (!hdr)
6208                 goto put_failure;
6209
6210         if (info->attrs[NL80211_ATTR_WIPHY]) {
6211                 bool self_managed;
6212
6213                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6214                 if (IS_ERR(rdev)) {
6215                         nlmsg_free(msg);
6216                         return PTR_ERR(rdev);
6217                 }
6218
6219                 wiphy = &rdev->wiphy;
6220                 self_managed = wiphy->regulatory_flags &
6221                                REGULATORY_WIPHY_SELF_MANAGED;
6222                 regdom = get_wiphy_regdom(wiphy);
6223
6224                 /* a self-managed-reg device must have a private regdom */
6225                 if (WARN_ON(!regdom && self_managed)) {
6226                         nlmsg_free(msg);
6227                         return -EINVAL;
6228                 }
6229
6230                 if (regdom &&
6231                     nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6232                         goto nla_put_failure;
6233         }
6234
6235         if (!wiphy && reg_last_request_cell_base() &&
6236             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6237                         NL80211_USER_REG_HINT_CELL_BASE))
6238                 goto nla_put_failure;
6239
6240         rcu_read_lock();
6241
6242         if (!regdom)
6243                 regdom = rcu_dereference(cfg80211_regdomain);
6244
6245         if (nl80211_put_regdom(regdom, msg))
6246                 goto nla_put_failure_rcu;
6247
6248         rcu_read_unlock();
6249
6250         genlmsg_end(msg, hdr);
6251         return genlmsg_reply(msg, info);
6252
6253 nla_put_failure_rcu:
6254         rcu_read_unlock();
6255 nla_put_failure:
6256         genlmsg_cancel(msg, hdr);
6257 put_failure:
6258         nlmsg_free(msg);
6259         return -EMSGSIZE;
6260 }
6261
6262 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
6263                                u32 seq, int flags, struct wiphy *wiphy,
6264                                const struct ieee80211_regdomain *regdom)
6265 {
6266         void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
6267                                    NL80211_CMD_GET_REG);
6268
6269         if (!hdr)
6270                 return -1;
6271
6272         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
6273
6274         if (nl80211_put_regdom(regdom, msg))
6275                 goto nla_put_failure;
6276
6277         if (!wiphy && reg_last_request_cell_base() &&
6278             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
6279                         NL80211_USER_REG_HINT_CELL_BASE))
6280                 goto nla_put_failure;
6281
6282         if (wiphy &&
6283             nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
6284                 goto nla_put_failure;
6285
6286         if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
6287             nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
6288                 goto nla_put_failure;
6289
6290         genlmsg_end(msg, hdr);
6291         return 0;
6292
6293 nla_put_failure:
6294         genlmsg_cancel(msg, hdr);
6295         return -EMSGSIZE;
6296 }
6297
6298 static int nl80211_get_reg_dump(struct sk_buff *skb,
6299                                 struct netlink_callback *cb)
6300 {
6301         const struct ieee80211_regdomain *regdom = NULL;
6302         struct cfg80211_registered_device *rdev;
6303         int err, reg_idx, start = cb->args[2];
6304
6305         rtnl_lock();
6306
6307         if (cfg80211_regdomain && start == 0) {
6308                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6309                                           NLM_F_MULTI, NULL,
6310                                           rtnl_dereference(cfg80211_regdomain));
6311                 if (err < 0)
6312                         goto out_err;
6313         }
6314
6315         /* the global regdom is idx 0 */
6316         reg_idx = 1;
6317         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
6318                 regdom = get_wiphy_regdom(&rdev->wiphy);
6319                 if (!regdom)
6320                         continue;
6321
6322                 if (++reg_idx <= start)
6323                         continue;
6324
6325                 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
6326                                           NLM_F_MULTI, &rdev->wiphy, regdom);
6327                 if (err < 0) {
6328                         reg_idx--;
6329                         break;
6330                 }
6331         }
6332
6333         cb->args[2] = reg_idx;
6334         err = skb->len;
6335 out_err:
6336         rtnl_unlock();
6337         return err;
6338 }
6339
6340 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
6341 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
6342         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
6343         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
6344         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
6345         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
6346         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
6347         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
6348         [NL80211_ATTR_DFS_CAC_TIME]             = { .type = NLA_U32 },
6349 };
6350
6351 static int parse_reg_rule(struct nlattr *tb[],
6352         struct ieee80211_reg_rule *reg_rule)
6353 {
6354         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
6355         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
6356
6357         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
6358                 return -EINVAL;
6359         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
6360                 return -EINVAL;
6361         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
6362                 return -EINVAL;
6363         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
6364                 return -EINVAL;
6365         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
6366                 return -EINVAL;
6367
6368         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
6369
6370         freq_range->start_freq_khz =
6371                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
6372         freq_range->end_freq_khz =
6373                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
6374         freq_range->max_bandwidth_khz =
6375                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
6376
6377         power_rule->max_eirp =
6378                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
6379
6380         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
6381                 power_rule->max_antenna_gain =
6382                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
6383
6384         if (tb[NL80211_ATTR_DFS_CAC_TIME])
6385                 reg_rule->dfs_cac_ms =
6386                         nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);
6387
6388         return 0;
6389 }
6390
6391 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
6392 {
6393         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
6394         struct nlattr *nl_reg_rule;
6395         char *alpha2;
6396         int rem_reg_rules, r;
6397         u32 num_rules = 0, rule_idx = 0, size_of_regd;
6398         enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
6399         struct ieee80211_regdomain *rd;
6400
6401         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
6402                 return -EINVAL;
6403
6404         if (!info->attrs[NL80211_ATTR_REG_RULES])
6405                 return -EINVAL;
6406
6407         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
6408
6409         if (info->attrs[NL80211_ATTR_DFS_REGION])
6410                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
6411
6412         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6413                             rem_reg_rules) {
6414                 num_rules++;
6415                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
6416                         return -EINVAL;
6417         }
6418
6419         if (!reg_is_valid_request(alpha2))
6420                 return -EINVAL;
6421
6422         size_of_regd = sizeof(struct ieee80211_regdomain) +
6423                        num_rules * sizeof(struct ieee80211_reg_rule);
6424
6425         rd = kzalloc(size_of_regd, GFP_KERNEL);
6426         if (!rd)
6427                 return -ENOMEM;
6428
6429         rd->n_reg_rules = num_rules;
6430         rd->alpha2[0] = alpha2[0];
6431         rd->alpha2[1] = alpha2[1];
6432
6433         /*
6434          * Disable DFS master mode if the DFS region was
6435          * not supported or known on this kernel.
6436          */
6437         if (reg_supported_dfs_region(dfs_region))
6438                 rd->dfs_region = dfs_region;
6439
6440         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
6441                             rem_reg_rules) {
6442                 r = nla_parse_nested(tb, NL80211_REG_RULE_ATTR_MAX,
6443                                      nl_reg_rule, reg_rule_policy,
6444                                      info->extack);
6445                 if (r)
6446                         goto bad_reg;
6447                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
6448                 if (r)
6449                         goto bad_reg;
6450
6451                 rule_idx++;
6452
6453                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
6454                         r = -EINVAL;
6455                         goto bad_reg;
6456                 }
6457         }
6458
6459         /* set_regdom takes ownership of rd */
6460         return set_regdom(rd, REGD_SOURCE_CRDA);
6461  bad_reg:
6462         kfree(rd);
6463         return r;
6464 }
6465 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */
6466
6467 static int validate_scan_freqs(struct nlattr *freqs)
6468 {
6469         struct nlattr *attr1, *attr2;
6470         int n_channels = 0, tmp1, tmp2;
6471
6472         nla_for_each_nested(attr1, freqs, tmp1) {
6473                 n_channels++;
6474                 /*
6475                  * Some hardware has a limited channel list for
6476                  * scanning, and it is pretty much nonsensical
6477                  * to scan for a channel twice, so disallow that
6478                  * and don't require drivers to check that the
6479                  * channel list they get isn't longer than what
6480                  * they can scan, as long as they can scan all
6481                  * the channels they registered at once.
6482                  */
6483                 nla_for_each_nested(attr2, freqs, tmp2)
6484                         if (attr1 != attr2 &&
6485                             nla_get_u32(attr1) == nla_get_u32(attr2))
6486                                 return 0;
6487         }
6488
6489         return n_channels;
6490 }
6491
6492 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
6493 {
6494         return b < NUM_NL80211_BANDS && wiphy->bands[b];
6495 }
6496
6497 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
6498                             struct cfg80211_bss_selection *bss_select)
6499 {
6500         struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
6501         struct nlattr *nest;
6502         int err;
6503         bool found = false;
6504         int i;
6505
6506         /* only process one nested attribute */
6507         nest = nla_data(nla);
6508         if (!nla_ok(nest, nla_len(nest)))
6509                 return -EINVAL;
6510
6511         err = nla_parse_nested(attr, NL80211_BSS_SELECT_ATTR_MAX, nest,
6512                                nl80211_bss_select_policy, NULL);
6513         if (err)
6514                 return err;
6515
6516         /* only one attribute may be given */
6517         for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
6518                 if (attr[i]) {
6519                         if (found)
6520                                 return -EINVAL;
6521                         found = true;
6522                 }
6523         }
6524
6525         bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;
6526
6527         if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
6528                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;
6529
6530         if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
6531                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
6532                 bss_select->param.band_pref =
6533                         nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
6534                 if (!is_band_valid(wiphy, bss_select->param.band_pref))
6535                         return -EINVAL;
6536         }
6537
6538         if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
6539                 struct nl80211_bss_select_rssi_adjust *adj_param;
6540
6541                 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
6542                 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
6543                 bss_select->param.adjust.band = adj_param->band;
6544                 bss_select->param.adjust.delta = adj_param->delta;
6545                 if (!is_band_valid(wiphy, bss_select->param.adjust.band))
6546                         return -EINVAL;
6547         }
6548
6549         /* user-space did not provide behaviour attribute */
6550         if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
6551                 return -EINVAL;
6552
6553         if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
6554                 return -EINVAL;
6555
6556         return 0;
6557 }
6558
6559 static int nl80211_parse_random_mac(struct nlattr **attrs,
6560                                     u8 *mac_addr, u8 *mac_addr_mask)
6561 {
6562         int i;
6563
6564         if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
6565                 eth_zero_addr(mac_addr);
6566                 eth_zero_addr(mac_addr_mask);
6567                 mac_addr[0] = 0x2;
6568                 mac_addr_mask[0] = 0x3;
6569
6570                 return 0;
6571         }
6572
6573         /* need both or none */
6574         if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
6575                 return -EINVAL;
6576
6577         memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
6578         memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);
6579
6580         /* don't allow or configure an mcast address */
6581         if (!is_multicast_ether_addr(mac_addr_mask) ||
6582             is_multicast_ether_addr(mac_addr))
6583                 return -EINVAL;
6584
6585         /*
6586          * allow users to pass a MAC address that has bits set outside
6587          * of the mask, but don't bother drivers with having to deal
6588          * with such bits
6589          */
6590         for (i = 0; i < ETH_ALEN; i++)
6591                 mac_addr[i] &= mac_addr_mask[i];
6592
6593         return 0;
6594 }
6595
6596 static bool cfg80211_off_channel_oper_allowed(struct wireless_dev *wdev)
6597 {
6598         ASSERT_WDEV_LOCK(wdev);
6599
6600         if (!cfg80211_beaconing_iface_active(wdev))
6601                 return true;
6602
6603         if (!(wdev->chandef.chan->flags & IEEE80211_CHAN_RADAR))
6604                 return true;
6605
6606         return regulatory_pre_cac_allowed(wdev->wiphy);
6607 }
6608
6609 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
6610 {
6611         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6612         struct wireless_dev *wdev = info->user_ptr[1];
6613         struct cfg80211_scan_request *request;
6614         struct nlattr *attr;
6615         struct wiphy *wiphy;
6616         int err, tmp, n_ssids = 0, n_channels, i;
6617         size_t ie_len;
6618
6619         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6620                 return -EINVAL;
6621
6622         wiphy = &rdev->wiphy;
6623
6624         if (wdev->iftype == NL80211_IFTYPE_NAN)
6625                 return -EOPNOTSUPP;
6626
6627         if (!rdev->ops->scan)
6628                 return -EOPNOTSUPP;
6629
6630         if (rdev->scan_req || rdev->scan_msg) {
6631                 err = -EBUSY;
6632                 goto unlock;
6633         }
6634
6635         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6636                 n_channels = validate_scan_freqs(
6637                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
6638                 if (!n_channels) {
6639                         err = -EINVAL;
6640                         goto unlock;
6641                 }
6642         } else {
6643                 n_channels = ieee80211_get_num_supported_channels(wiphy);
6644         }
6645
6646         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
6647                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
6648                         n_ssids++;
6649
6650         if (n_ssids > wiphy->max_scan_ssids) {
6651                 err = -EINVAL;
6652                 goto unlock;
6653         }
6654
6655         if (info->attrs[NL80211_ATTR_IE])
6656                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6657         else
6658                 ie_len = 0;
6659
6660         if (ie_len > wiphy->max_scan_ie_len) {
6661                 err = -EINVAL;
6662                 goto unlock;
6663         }
6664
6665         request = kzalloc(sizeof(*request)
6666                         + sizeof(*request->ssids) * n_ssids
6667                         + sizeof(*request->channels) * n_channels
6668                         + ie_len, GFP_KERNEL);
6669         if (!request) {
6670                 err = -ENOMEM;
6671                 goto unlock;
6672         }
6673
6674         if (n_ssids)
6675                 request->ssids = (void *)&request->channels[n_channels];
6676         request->n_ssids = n_ssids;
6677         if (ie_len) {
6678                 if (n_ssids)
6679                         request->ie = (void *)(request->ssids + n_ssids);
6680                 else
6681                         request->ie = (void *)(request->channels + n_channels);
6682         }
6683
6684         i = 0;
6685         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
6686                 /* user specified, bail out if channel not found */
6687                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
6688                         struct ieee80211_channel *chan;
6689
6690                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
6691
6692                         if (!chan) {
6693                                 err = -EINVAL;
6694                                 goto out_free;
6695                         }
6696
6697                         /* ignore disabled channels */
6698                         if (chan->flags & IEEE80211_CHAN_DISABLED)
6699                                 continue;
6700
6701                         request->channels[i] = chan;
6702                         i++;
6703                 }
6704         } else {
6705                 enum nl80211_band band;
6706
6707                 /* all channels */
6708                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
6709                         int j;
6710
6711                         if (!wiphy->bands[band])
6712                                 continue;
6713                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
6714                                 struct ieee80211_channel *chan;
6715
6716                                 chan = &wiphy->bands[band]->channels[j];
6717
6718                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
6719                                         continue;
6720
6721                                 request->channels[i] = chan;
6722                                 i++;
6723                         }
6724                 }
6725         }
6726
6727         if (!i) {
6728                 err = -EINVAL;
6729                 goto out_free;
6730         }
6731
6732         request->n_channels = i;
6733
6734         wdev_lock(wdev);
6735         if (!cfg80211_off_channel_oper_allowed(wdev)) {
6736                 struct ieee80211_channel *chan;
6737
6738                 if (request->n_channels != 1) {
6739                         wdev_unlock(wdev);
6740                         err = -EBUSY;
6741                         goto out_free;
6742                 }
6743
6744                 chan = request->channels[0];
6745                 if (chan->center_freq != wdev->chandef.chan->center_freq) {
6746                         wdev_unlock(wdev);
6747                         err = -EBUSY;
6748                         goto out_free;
6749                 }
6750         }
6751         wdev_unlock(wdev);
6752
6753         i = 0;
6754         if (n_ssids) {
6755                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
6756                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
6757                                 err = -EINVAL;
6758                                 goto out_free;
6759                         }
6760                         request->ssids[i].ssid_len = nla_len(attr);
6761                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
6762                         i++;
6763                 }
6764         }
6765
6766         if (info->attrs[NL80211_ATTR_IE]) {
6767                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6768                 memcpy((void *)request->ie,
6769                        nla_data(info->attrs[NL80211_ATTR_IE]),
6770                        request->ie_len);
6771         }
6772
6773         for (i = 0; i < NUM_NL80211_BANDS; i++)
6774                 if (wiphy->bands[i])
6775                         request->rates[i] =
6776                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
6777
6778         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
6779                 nla_for_each_nested(attr,
6780                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
6781                                     tmp) {
6782                         enum nl80211_band band = nla_type(attr);
6783
6784                         if (band < 0 || band >= NUM_NL80211_BANDS) {
6785                                 err = -EINVAL;
6786                                 goto out_free;
6787                         }
6788
6789                         if (!wiphy->bands[band])
6790                                 continue;
6791
6792                         err = ieee80211_get_ratemask(wiphy->bands[band],
6793                                                      nla_data(attr),
6794                                                      nla_len(attr),
6795                                                      &request->rates[band]);
6796                         if (err)
6797                                 goto out_free;
6798                 }
6799         }
6800
6801         if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
6802                 if (!wiphy_ext_feature_isset(wiphy,
6803                                         NL80211_EXT_FEATURE_SET_SCAN_DWELL)) {
6804                         err = -EOPNOTSUPP;
6805                         goto out_free;
6806                 }
6807
6808                 request->duration =
6809                         nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
6810                 request->duration_mandatory =
6811                         nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
6812         }
6813
6814         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
6815                 request->flags = nla_get_u32(
6816                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
6817                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
6818                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
6819                         err = -EOPNOTSUPP;
6820                         goto out_free;
6821                 }
6822
6823                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
6824                         if (!(wiphy->features &
6825                                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR)) {
6826                                 err = -EOPNOTSUPP;
6827                                 goto out_free;
6828                         }
6829
6830                         if (wdev->current_bss) {
6831                                 err = -EOPNOTSUPP;
6832                                 goto out_free;
6833                         }
6834
6835                         err = nl80211_parse_random_mac(info->attrs,
6836                                                        request->mac_addr,
6837                                                        request->mac_addr_mask);
6838                         if (err)
6839                                 goto out_free;
6840                 }
6841         }
6842
6843         request->no_cck =
6844                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6845
6846         /* Initial implementation used NL80211_ATTR_MAC to set the specific
6847          * BSSID to scan for. This was problematic because that same attribute
6848          * was already used for another purpose (local random MAC address). The
6849          * NL80211_ATTR_BSSID attribute was added to fix this. For backwards
6850          * compatibility with older userspace components, also use the
6851          * NL80211_ATTR_MAC value here if it can be determined to be used for
6852          * the specific BSSID use case instead of the random MAC address
6853          * (NL80211_ATTR_SCAN_FLAGS is used to enable random MAC address use).
6854          */
6855         if (info->attrs[NL80211_ATTR_BSSID])
6856                 memcpy(request->bssid,
6857                        nla_data(info->attrs[NL80211_ATTR_BSSID]), ETH_ALEN);
6858         else if (!(request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) &&
6859                  info->attrs[NL80211_ATTR_MAC])
6860                 memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
6861                        ETH_ALEN);
6862         else
6863                 eth_broadcast_addr(request->bssid);
6864
6865         request->wdev = wdev;
6866         request->wiphy = &rdev->wiphy;
6867         request->scan_start = jiffies;
6868
6869         rdev->scan_req = request;
6870         err = rdev_scan(rdev, request);
6871
6872         if (!err) {
6873                 nl80211_send_scan_start(rdev, wdev);
6874                 if (wdev->netdev)
6875                         dev_hold(wdev->netdev);
6876         } else {
6877  out_free:
6878                 rdev->scan_req = NULL;
6879                 kfree(request);
6880         }
6881
6882  unlock:
6883         return err;
6884 }
6885
6886 static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
6887 {
6888         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6889         struct wireless_dev *wdev = info->user_ptr[1];
6890
6891         if (!rdev->ops->abort_scan)
6892                 return -EOPNOTSUPP;
6893
6894         if (rdev->scan_msg)
6895                 return 0;
6896
6897         if (!rdev->scan_req)
6898                 return -ENOENT;
6899
6900         rdev_abort_scan(rdev, wdev);
6901         return 0;
6902 }
6903
6904 static int
6905 nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
6906                                struct cfg80211_sched_scan_request *request,
6907                                struct nlattr **attrs)
6908 {
6909         int tmp, err, i = 0;
6910         struct nlattr *attr;
6911
6912         if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
6913                 u32 interval;
6914
6915                 /*
6916                  * If scan plans are not specified,
6917                  * %NL80211_ATTR_SCHED_SCAN_INTERVAL will be specified. In this
6918                  * case one scan plan will be set with the specified scan
6919                  * interval and infinite number of iterations.
6920                  */
6921                 interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
6922                 if (!interval)
6923                         return -EINVAL;
6924
6925                 request->scan_plans[0].interval =
6926                         DIV_ROUND_UP(interval, MSEC_PER_SEC);
6927                 if (!request->scan_plans[0].interval)
6928                         return -EINVAL;
6929
6930                 if (request->scan_plans[0].interval >
6931                     wiphy->max_sched_scan_plan_interval)
6932                         request->scan_plans[0].interval =
6933                                 wiphy->max_sched_scan_plan_interval;
6934
6935                 return 0;
6936         }
6937
6938         nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
6939                 struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];
6940
6941                 if (WARN_ON(i >= n_plans))
6942                         return -EINVAL;
6943
6944                 err = nla_parse_nested(plan, NL80211_SCHED_SCAN_PLAN_MAX,
6945                                        attr, nl80211_plan_policy, NULL);
6946                 if (err)
6947                         return err;
6948
6949                 if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
6950                         return -EINVAL;
6951
6952                 request->scan_plans[i].interval =
6953                         nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
6954                 if (!request->scan_plans[i].interval ||
6955                     request->scan_plans[i].interval >
6956                     wiphy->max_sched_scan_plan_interval)
6957                         return -EINVAL;
6958
6959                 if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
6960                         request->scan_plans[i].iterations =
6961                                 nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
6962                         if (!request->scan_plans[i].iterations ||
6963                             (request->scan_plans[i].iterations >
6964                              wiphy->max_sched_scan_plan_iterations))
6965                                 return -EINVAL;
6966                 } else if (i < n_plans - 1) {
6967                         /*
6968                          * All scan plans but the last one must specify
6969                          * a finite number of iterations
6970                          */
6971                         return -EINVAL;
6972                 }
6973
6974                 i++;
6975         }
6976
6977         /*
6978          * The last scan plan must not specify the number of
6979          * iterations, it is supposed to run infinitely
6980          */
6981         if (request->scan_plans[n_plans - 1].iterations)
6982                 return  -EINVAL;
6983
6984         return 0;
6985 }
6986
6987 static struct cfg80211_sched_scan_request *
6988 nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
6989                          struct nlattr **attrs, int max_match_sets)
6990 {
6991         struct cfg80211_sched_scan_request *request;
6992         struct nlattr *attr;
6993         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
6994         enum nl80211_band band;
6995         size_t ie_len;
6996         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
6997         s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;
6998
6999         if (!is_valid_ie_attr(attrs[NL80211_ATTR_IE]))
7000                 return ERR_PTR(-EINVAL);
7001
7002         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
7003                 n_channels = validate_scan_freqs(
7004                                 attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
7005                 if (!n_channels)
7006                         return ERR_PTR(-EINVAL);
7007         } else {
7008                 n_channels = ieee80211_get_num_supported_channels(wiphy);
7009         }
7010
7011         if (attrs[NL80211_ATTR_SCAN_SSIDS])
7012                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
7013                                     tmp)
7014                         n_ssids++;
7015
7016         if (n_ssids > wiphy->max_sched_scan_ssids)
7017                 return ERR_PTR(-EINVAL);
7018
7019         /*
7020          * First, count the number of 'real' matchsets. Due to an issue with
7021          * the old implementation, matchsets containing only the RSSI attribute
7022          * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
7023          * RSSI for all matchsets, rather than their own matchset for reporting
7024          * all APs with a strong RSSI. This is needed to be compatible with
7025          * older userspace that treated a matchset with only the RSSI as the
7026          * global RSSI for all other matchsets - if there are other matchsets.
7027          */
7028         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
7029                 nla_for_each_nested(attr,
7030                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
7031                                     tmp) {
7032                         struct nlattr *rssi;
7033
7034                         err = nla_parse_nested(tb,
7035                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
7036                                                attr, nl80211_match_policy,
7037                                                NULL);
7038                         if (err)
7039                                 return ERR_PTR(err);
7040
7041                         /* SSID and BSSID are mutually exclusive */
7042                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] &&
7043                             tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID])
7044                                 return ERR_PTR(-EINVAL);
7045
7046                         /* add other standalone attributes here */
7047                         if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] ||
7048                             tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID]) {
7049                                 n_match_sets++;
7050                                 continue;
7051                         }
7052                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7053                         if (rssi)
7054                                 default_match_rssi = nla_get_s32(rssi);
7055                 }
7056         }
7057
7058         /* However, if there's no other matchset, add the RSSI one */
7059         if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
7060                 n_match_sets = 1;
7061
7062         if (n_match_sets > max_match_sets)
7063                 return ERR_PTR(-EINVAL);
7064
7065         if (attrs[NL80211_ATTR_IE])
7066                 ie_len = nla_len(attrs[NL80211_ATTR_IE]);
7067         else
7068                 ie_len = 0;
7069
7070         if (ie_len > wiphy->max_sched_scan_ie_len)
7071                 return ERR_PTR(-EINVAL);
7072
7073         if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
7074                 /*
7075                  * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
7076                  * each scan plan already specifies its own interval
7077                  */
7078                 if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
7079                         return ERR_PTR(-EINVAL);
7080
7081                 nla_for_each_nested(attr,
7082                                     attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
7083                         n_plans++;
7084         } else {
7085                 /*
7086                  * The scan interval attribute is kept for backward
7087                  * compatibility. If no scan plans are specified and sched scan
7088                  * interval is specified, one scan plan will be set with this
7089                  * scan interval and infinite number of iterations.
7090                  */
7091                 if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
7092                         return ERR_PTR(-EINVAL);
7093
7094                 n_plans = 1;
7095         }
7096
7097         if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
7098                 return ERR_PTR(-EINVAL);
7099
7100         if (!wiphy_ext_feature_isset(
7101                     wiphy, NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI) &&
7102             (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] ||
7103              attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]))
7104                 return ERR_PTR(-EINVAL);
7105
7106         request = kzalloc(sizeof(*request)
7107                         + sizeof(*request->ssids) * n_ssids
7108                         + sizeof(*request->match_sets) * n_match_sets
7109                         + sizeof(*request->scan_plans) * n_plans
7110                         + sizeof(*request->channels) * n_channels
7111                         + ie_len, GFP_KERNEL);
7112         if (!request)
7113                 return ERR_PTR(-ENOMEM);
7114
7115         if (n_ssids)
7116                 request->ssids = (void *)&request->channels[n_channels];
7117         request->n_ssids = n_ssids;
7118         if (ie_len) {
7119                 if (n_ssids)
7120                         request->ie = (void *)(request->ssids + n_ssids);
7121                 else
7122                         request->ie = (void *)(request->channels + n_channels);
7123         }
7124
7125         if (n_match_sets) {
7126                 if (request->ie)
7127                         request->match_sets = (void *)(request->ie + ie_len);
7128                 else if (n_ssids)
7129                         request->match_sets =
7130                                 (void *)(request->ssids + n_ssids);
7131                 else
7132                         request->match_sets =
7133                                 (void *)(request->channels + n_channels);
7134         }
7135         request->n_match_sets = n_match_sets;
7136
7137         if (n_match_sets)
7138                 request->scan_plans = (void *)(request->match_sets +
7139                                                n_match_sets);
7140         else if (request->ie)
7141                 request->scan_plans = (void *)(request->ie + ie_len);
7142         else if (n_ssids)
7143                 request->scan_plans = (void *)(request->ssids + n_ssids);
7144         else
7145                 request->scan_plans = (void *)(request->channels + n_channels);
7146
7147         request->n_scan_plans = n_plans;
7148
7149         i = 0;
7150         if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
7151                 /* user specified, bail out if channel not found */
7152                 nla_for_each_nested(attr,
7153                                     attrs[NL80211_ATTR_SCAN_FREQUENCIES],
7154                                     tmp) {
7155                         struct ieee80211_channel *chan;
7156
7157                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
7158
7159                         if (!chan) {
7160                                 err = -EINVAL;
7161                                 goto out_free;
7162                         }
7163
7164                         /* ignore disabled channels */
7165                         if (chan->flags & IEEE80211_CHAN_DISABLED)
7166                                 continue;
7167
7168                         request->channels[i] = chan;
7169                         i++;
7170                 }
7171         } else {
7172                 /* all channels */
7173                 for (band = 0; band < NUM_NL80211_BANDS; band++) {
7174                         int j;
7175
7176                         if (!wiphy->bands[band])
7177                                 continue;
7178                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
7179                                 struct ieee80211_channel *chan;
7180
7181                                 chan = &wiphy->bands[band]->channels[j];
7182
7183                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
7184                                         continue;
7185
7186                                 request->channels[i] = chan;
7187                                 i++;
7188                         }
7189                 }
7190         }
7191
7192         if (!i) {
7193                 err = -EINVAL;
7194                 goto out_free;
7195         }
7196
7197         request->n_channels = i;
7198
7199         i = 0;
7200         if (n_ssids) {
7201                 nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
7202                                     tmp) {
7203                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
7204                                 err = -EINVAL;
7205                                 goto out_free;
7206                         }
7207                         request->ssids[i].ssid_len = nla_len(attr);
7208                         memcpy(request->ssids[i].ssid, nla_data(attr),
7209                                nla_len(attr));
7210                         i++;
7211                 }
7212         }
7213
7214         i = 0;
7215         if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
7216                 nla_for_each_nested(attr,
7217                                     attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
7218                                     tmp) {
7219                         struct nlattr *ssid, *bssid, *rssi;
7220
7221                         err = nla_parse_nested(tb,
7222                                                NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
7223                                                attr, nl80211_match_policy,
7224                                                NULL);
7225                         if (err)
7226                                 goto out_free;
7227                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
7228                         bssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID];
7229                         if (ssid || bssid) {
7230                                 if (WARN_ON(i >= n_match_sets)) {
7231                                         /* this indicates a programming error,
7232                                          * the loop above should have verified
7233                                          * things properly
7234                                          */
7235                                         err = -EINVAL;
7236                                         goto out_free;
7237                                 }
7238
7239                                 if (ssid) {
7240                                         if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
7241                                                 err = -EINVAL;
7242                                                 goto out_free;
7243                                         }
7244                                         memcpy(request->match_sets[i].ssid.ssid,
7245                                                nla_data(ssid), nla_len(ssid));
7246                                         request->match_sets[i].ssid.ssid_len =
7247                                                 nla_len(ssid);
7248                                 }
7249                                 if (bssid) {
7250                                         if (nla_len(bssid) != ETH_ALEN) {
7251                                                 err = -EINVAL;
7252                                                 goto out_free;
7253                                         }
7254                                         memcpy(request->match_sets[i].bssid,
7255                                                nla_data(bssid), ETH_ALEN);
7256                                 }
7257
7258                                 /* special attribute - old implementation w/a */
7259                                 request->match_sets[i].rssi_thold =
7260                                         default_match_rssi;
7261                                 rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
7262                                 if (rssi)
7263                                         request->match_sets[i].rssi_thold =
7264                                                 nla_get_s32(rssi);
7265                         }
7266                         i++;
7267                 }
7268
7269                 /* there was no other matchset, so the RSSI one is alone */
7270                 if (i == 0 && n_match_sets)
7271                         request->match_sets[0].rssi_thold = default_match_rssi;
7272
7273                 request->min_rssi_thold = INT_MAX;
7274                 for (i = 0; i < n_match_sets; i++)
7275                         request->min_rssi_thold =
7276                                 min(request->match_sets[i].rssi_thold,
7277                                     request->min_rssi_thold);
7278         } else {
7279                 request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
7280         }
7281
7282         if (ie_len) {
7283                 request->ie_len = ie_len;
7284                 memcpy((void *)request->ie,
7285                        nla_data(attrs[NL80211_ATTR_IE]),
7286                        request->ie_len);
7287         }
7288
7289         if (attrs[NL80211_ATTR_SCAN_FLAGS]) {
7290                 request->flags = nla_get_u32(
7291                         attrs[NL80211_ATTR_SCAN_FLAGS]);
7292                 if ((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
7293                     !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) {
7294                         err = -EOPNOTSUPP;
7295                         goto out_free;
7296                 }
7297
7298                 if (request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
7299                         u32 flg = NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR;
7300
7301                         if (!wdev) /* must be net-detect */
7302                                 flg = NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
7303
7304                         if (!(wiphy->features & flg)) {
7305                                 err = -EOPNOTSUPP;
7306                                 goto out_free;
7307                         }
7308
7309                         if (wdev && wdev->current_bss) {
7310                                 err = -EOPNOTSUPP;
7311                                 goto out_free;
7312                         }
7313
7314                         err = nl80211_parse_random_mac(attrs, request->mac_addr,
7315                                                        request->mac_addr_mask);
7316                         if (err)
7317                                 goto out_free;
7318                 }
7319         }
7320
7321         if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
7322                 request->delay =
7323                         nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);
7324
7325         if (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]) {
7326                 request->relative_rssi = nla_get_s8(
7327                         attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]);
7328                 request->relative_rssi_set = true;
7329         }
7330
7331         if (request->relative_rssi_set &&
7332             attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]) {
7333                 struct nl80211_bss_select_rssi_adjust *rssi_adjust;
7334
7335                 rssi_adjust = nla_data(
7336                         attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]);
7337                 request->rssi_adjust.band = rssi_adjust->band;
7338                 request->rssi_adjust.delta = rssi_adjust->delta;
7339                 if (!is_band_valid(wiphy, request->rssi_adjust.band)) {
7340                         err = -EINVAL;
7341                         goto out_free;
7342                 }
7343         }
7344
7345         err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
7346         if (err)
7347                 goto out_free;
7348
7349         request->scan_start = jiffies;
7350
7351         return request;
7352
7353 out_free:
7354         kfree(request);
7355         return ERR_PTR(err);
7356 }
7357
7358 static int nl80211_start_sched_scan(struct sk_buff *skb,
7359                                     struct genl_info *info)
7360 {
7361         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7362         struct net_device *dev = info->user_ptr[1];
7363         struct wireless_dev *wdev = dev->ieee80211_ptr;
7364         struct cfg80211_sched_scan_request *sched_scan_req;
7365         bool want_multi;
7366         int err;
7367
7368         if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_start)
7369                 return -EOPNOTSUPP;
7370
7371         want_multi = info->attrs[NL80211_ATTR_SCHED_SCAN_MULTI];
7372         err = cfg80211_sched_scan_req_possible(rdev, want_multi);
7373         if (err)
7374                 return err;
7375
7376         sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
7377                                                   info->attrs,
7378                                                   rdev->wiphy.max_match_sets);
7379
7380         err = PTR_ERR_OR_ZERO(sched_scan_req);
7381         if (err)
7382                 goto out_err;
7383
7384         /* leave request id zero for legacy request
7385          * or if driver does not support multi-scheduled scan
7386          */
7387         if (want_multi && rdev->wiphy.max_sched_scan_reqs > 1) {
7388                 while (!sched_scan_req->reqid)
7389                         sched_scan_req->reqid = rdev->wiphy.cookie_counter++;
7390         }
7391
7392         err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
7393         if (err)
7394                 goto out_free;
7395
7396         sched_scan_req->dev = dev;
7397         sched_scan_req->wiphy = &rdev->wiphy;
7398
7399         if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
7400                 sched_scan_req->owner_nlportid = info->snd_portid;
7401
7402         cfg80211_add_sched_scan_req(rdev, sched_scan_req);
7403
7404         nl80211_send_sched_scan(sched_scan_req, NL80211_CMD_START_SCHED_SCAN);
7405         return 0;
7406
7407 out_free:
7408         kfree(sched_scan_req);
7409 out_err:
7410         return err;
7411 }
7412
7413 static int nl80211_stop_sched_scan(struct sk_buff *skb,
7414                                    struct genl_info *info)
7415 {
7416         struct cfg80211_sched_scan_request *req;
7417         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7418         u64 cookie;
7419
7420         if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_stop)
7421                 return -EOPNOTSUPP;
7422
7423         if (info->attrs[NL80211_ATTR_COOKIE]) {
7424                 cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7425                 return __cfg80211_stop_sched_scan(rdev, cookie, false);
7426         }
7427
7428         req = list_first_or_null_rcu(&rdev->sched_scan_req_list,
7429                                      struct cfg80211_sched_scan_request,
7430                                      list);
7431         if (!req || req->reqid ||
7432             (req->owner_nlportid &&
7433              req->owner_nlportid != info->snd_portid))
7434                 return -ENOENT;
7435
7436         return cfg80211_stop_sched_scan_req(rdev, req, false);
7437 }
7438
7439 static int nl80211_start_radar_detection(struct sk_buff *skb,
7440                                          struct genl_info *info)
7441 {
7442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7443         struct net_device *dev = info->user_ptr[1];
7444         struct wireless_dev *wdev = dev->ieee80211_ptr;
7445         struct cfg80211_chan_def chandef;
7446         enum nl80211_dfs_regions dfs_region;
7447         unsigned int cac_time_ms;
7448         int err;
7449
7450         dfs_region = reg_get_dfs_region(wdev->wiphy);
7451         if (dfs_region == NL80211_DFS_UNSET)
7452                 return -EINVAL;
7453
7454         err = nl80211_parse_chandef(rdev, info, &chandef);
7455         if (err)
7456                 return err;
7457
7458         if (netif_carrier_ok(dev))
7459                 return -EBUSY;
7460
7461         if (wdev->cac_started)
7462                 return -EBUSY;
7463
7464         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef,
7465                                             wdev->iftype);
7466         if (err < 0)
7467                 return err;
7468
7469         if (err == 0)
7470                 return -EINVAL;
7471
7472         if (!cfg80211_chandef_dfs_usable(wdev->wiphy, &chandef))
7473                 return -EINVAL;
7474
7475         if (!rdev->ops->start_radar_detection)
7476                 return -EOPNOTSUPP;
7477
7478         cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
7479         if (WARN_ON(!cac_time_ms))
7480                 cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
7481
7482         err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
7483         if (!err) {
7484                 wdev->chandef = chandef;
7485                 wdev->cac_started = true;
7486                 wdev->cac_start_time = jiffies;
7487                 wdev->cac_time_ms = cac_time_ms;
7488         }
7489         return err;
7490 }
7491
7492 static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
7493 {
7494         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7495         struct net_device *dev = info->user_ptr[1];
7496         struct wireless_dev *wdev = dev->ieee80211_ptr;
7497         struct cfg80211_csa_settings params;
7498         /* csa_attrs is defined static to avoid waste of stack size - this
7499          * function is called under RTNL lock, so this should not be a problem.
7500          */
7501         static struct nlattr *csa_attrs[NL80211_ATTR_MAX+1];
7502         int err;
7503         bool need_new_beacon = false;
7504         int len, i;
7505         u32 cs_count;
7506
7507         if (!rdev->ops->channel_switch ||
7508             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
7509                 return -EOPNOTSUPP;
7510
7511         switch (dev->ieee80211_ptr->iftype) {
7512         case NL80211_IFTYPE_AP:
7513         case NL80211_IFTYPE_P2P_GO:
7514                 need_new_beacon = true;
7515
7516                 /* useless if AP is not running */
7517                 if (!wdev->beacon_interval)
7518                         return -ENOTCONN;
7519                 break;
7520         case NL80211_IFTYPE_ADHOC:
7521                 if (!wdev->ssid_len)
7522                         return -ENOTCONN;
7523                 break;
7524         case NL80211_IFTYPE_MESH_POINT:
7525                 if (!wdev->mesh_id_len)
7526                         return -ENOTCONN;
7527                 break;
7528         default:
7529                 return -EOPNOTSUPP;
7530         }
7531
7532         memset(&params, 0, sizeof(params));
7533
7534         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
7535             !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
7536                 return -EINVAL;
7537
7538         /* only important for AP, IBSS and mesh create IEs internally */
7539         if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
7540                 return -EINVAL;
7541
7542         /* Even though the attribute is u32, the specification says
7543          * u8, so let's make sure we don't overflow.
7544          */
7545         cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
7546         if (cs_count > 255)
7547                 return -EINVAL;
7548
7549         params.count = cs_count;
7550
7551         if (!need_new_beacon)
7552                 goto skip_beacons;
7553
7554         err = nl80211_parse_beacon(info->attrs, &params.beacon_after);
7555         if (err)
7556                 return err;
7557
7558         err = nla_parse_nested(csa_attrs, NL80211_ATTR_MAX,
7559                                info->attrs[NL80211_ATTR_CSA_IES],
7560                                nl80211_policy, info->extack);
7561         if (err)
7562                 return err;
7563
7564         err = nl80211_parse_beacon(csa_attrs, &params.beacon_csa);
7565         if (err)
7566                 return err;
7567
7568         if (!csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON])
7569                 return -EINVAL;
7570
7571         len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7572         if (!len || (len % sizeof(u16)))
7573                 return -EINVAL;
7574
7575         params.n_counter_offsets_beacon = len / sizeof(u16);
7576         if (rdev->wiphy.max_num_csa_counters &&
7577             (params.n_counter_offsets_beacon >
7578              rdev->wiphy.max_num_csa_counters))
7579                 return -EINVAL;
7580
7581         params.counter_offsets_beacon =
7582                 nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_BEACON]);
7583
7584         /* sanity checks - counters should fit and be the same */
7585         for (i = 0; i < params.n_counter_offsets_beacon; i++) {
7586                 u16 offset = params.counter_offsets_beacon[i];
7587
7588                 if (offset >= params.beacon_csa.tail_len)
7589                         return -EINVAL;
7590
7591                 if (params.beacon_csa.tail[offset] != params.count)
7592                         return -EINVAL;
7593         }
7594
7595         if (csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]) {
7596                 len = nla_len(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7597                 if (!len || (len % sizeof(u16)))
7598                         return -EINVAL;
7599
7600                 params.n_counter_offsets_presp = len / sizeof(u16);
7601                 if (rdev->wiphy.max_num_csa_counters &&
7602                     (params.n_counter_offsets_presp >
7603                      rdev->wiphy.max_num_csa_counters))
7604                         return -EINVAL;
7605
7606                 params.counter_offsets_presp =
7607                         nla_data(csa_attrs[NL80211_ATTR_CSA_C_OFF_PRESP]);
7608
7609                 /* sanity checks - counters should fit and be the same */
7610                 for (i = 0; i < params.n_counter_offsets_presp; i++) {
7611                         u16 offset = params.counter_offsets_presp[i];
7612
7613                         if (offset >= params.beacon_csa.probe_resp_len)
7614                                 return -EINVAL;
7615
7616                         if (params.beacon_csa.probe_resp[offset] !=
7617                             params.count)
7618                                 return -EINVAL;
7619                 }
7620         }
7621
7622 skip_beacons:
7623         err = nl80211_parse_chandef(rdev, info, &params.chandef);
7624         if (err)
7625                 return err;
7626
7627         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
7628                                            wdev->iftype))
7629                 return -EINVAL;
7630
7631         err = cfg80211_chandef_dfs_required(wdev->wiphy,
7632                                             &params.chandef,
7633                                             wdev->iftype);
7634         if (err < 0)
7635                 return err;
7636
7637         if (err > 0)
7638                 params.radar_required = true;
7639
7640         if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
7641                 params.block_tx = true;
7642
7643         wdev_lock(wdev);
7644         err = rdev_channel_switch(rdev, dev, &params);
7645         wdev_unlock(wdev);
7646
7647         return err;
7648 }
7649
7650 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
7651                             u32 seq, int flags,
7652                             struct cfg80211_registered_device *rdev,
7653                             struct wireless_dev *wdev,
7654                             struct cfg80211_internal_bss *intbss)
7655 {
7656         struct cfg80211_bss *res = &intbss->pub;
7657         const struct cfg80211_bss_ies *ies;
7658         void *hdr;
7659         struct nlattr *bss;
7660
7661         ASSERT_WDEV_LOCK(wdev);
7662
7663         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
7664                              NL80211_CMD_NEW_SCAN_RESULTS);
7665         if (!hdr)
7666                 return -1;
7667
7668         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
7669
7670         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
7671                 goto nla_put_failure;
7672         if (wdev->netdev &&
7673             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
7674                 goto nla_put_failure;
7675         if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
7676                               NL80211_ATTR_PAD))
7677                 goto nla_put_failure;
7678
7679         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
7680         if (!bss)
7681                 goto nla_put_failure;
7682         if ((!is_zero_ether_addr(res->bssid) &&
7683              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
7684                 goto nla_put_failure;
7685
7686         rcu_read_lock();
7687         /* indicate whether we have probe response data or not */
7688         if (rcu_access_pointer(res->proberesp_ies) &&
7689             nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
7690                 goto fail_unlock_rcu;
7691
7692         /* this pointer prefers to be pointed to probe response data
7693          * but is always valid
7694          */
7695         ies = rcu_dereference(res->ies);
7696         if (ies) {
7697                 if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
7698                                       NL80211_BSS_PAD))
7699                         goto fail_unlock_rcu;
7700                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
7701                                         ies->len, ies->data))
7702                         goto fail_unlock_rcu;
7703         }
7704
7705         /* and this pointer is always (unless driver didn't know) beacon data */
7706         ies = rcu_dereference(res->beacon_ies);
7707         if (ies && ies->from_beacon) {
7708                 if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
7709                                       NL80211_BSS_PAD))
7710                         goto fail_unlock_rcu;
7711                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
7712                                         ies->len, ies->data))
7713                         goto fail_unlock_rcu;
7714         }
7715         rcu_read_unlock();
7716
7717         if (res->beacon_interval &&
7718             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
7719                 goto nla_put_failure;
7720         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
7721             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
7722             nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||
7723             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
7724                         jiffies_to_msecs(jiffies - intbss->ts)))
7725                 goto nla_put_failure;
7726
7727         if (intbss->parent_tsf &&
7728             (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
7729                                intbss->parent_tsf, NL80211_BSS_PAD) ||
7730              nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
7731                      intbss->parent_bssid)))
7732                 goto nla_put_failure;
7733
7734         if (intbss->ts_boottime &&
7735             nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
7736                               intbss->ts_boottime, NL80211_BSS_PAD))
7737                 goto nla_put_failure;
7738
7739         switch (rdev->wiphy.signal_type) {
7740         case CFG80211_SIGNAL_TYPE_MBM:
7741                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
7742                         goto nla_put_failure;
7743                 break;
7744         case CFG80211_SIGNAL_TYPE_UNSPEC:
7745                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
7746                         goto nla_put_failure;
7747                 break;
7748         default:
7749                 break;
7750         }
7751
7752         switch (wdev->iftype) {
7753         case NL80211_IFTYPE_P2P_CLIENT:
7754         case NL80211_IFTYPE_STATION:
7755                 if (intbss == wdev->current_bss &&
7756                     nla_put_u32(msg, NL80211_BSS_STATUS,
7757                                 NL80211_BSS_STATUS_ASSOCIATED))
7758                         goto nla_put_failure;
7759                 break;
7760         case NL80211_IFTYPE_ADHOC:
7761                 if (intbss == wdev->current_bss &&
7762                     nla_put_u32(msg, NL80211_BSS_STATUS,
7763                                 NL80211_BSS_STATUS_IBSS_JOINED))
7764                         goto nla_put_failure;
7765                 break;
7766         default:
7767                 break;
7768         }
7769
7770         nla_nest_end(msg, bss);
7771
7772         genlmsg_end(msg, hdr);
7773         return 0;
7774
7775  fail_unlock_rcu:
7776         rcu_read_unlock();
7777  nla_put_failure:
7778         genlmsg_cancel(msg, hdr);
7779         return -EMSGSIZE;
7780 }
7781
7782 static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
7783 {
7784         struct cfg80211_registered_device *rdev;
7785         struct cfg80211_internal_bss *scan;
7786         struct wireless_dev *wdev;
7787         int start = cb->args[2], idx = 0;
7788         int err;
7789
7790         rtnl_lock();
7791         err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7792         if (err) {
7793                 rtnl_unlock();
7794                 return err;
7795         }
7796
7797         wdev_lock(wdev);
7798         spin_lock_bh(&rdev->bss_lock);
7799         cfg80211_bss_expire(rdev);
7800
7801         cb->seq = rdev->bss_generation;
7802
7803         list_for_each_entry(scan, &rdev->bss_list, list) {
7804                 if (++idx <= start)
7805                         continue;
7806                 if (nl80211_send_bss(skb, cb,
7807                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7808                                 rdev, wdev, scan) < 0) {
7809                         idx--;
7810                         break;
7811                 }
7812         }
7813
7814         spin_unlock_bh(&rdev->bss_lock);
7815         wdev_unlock(wdev);
7816
7817         cb->args[2] = idx;
7818         rtnl_unlock();
7819
7820         return skb->len;
7821 }
7822
7823 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
7824                                int flags, struct net_device *dev,
7825                                bool allow_radio_stats,
7826                                struct survey_info *survey)
7827 {
7828         void *hdr;
7829         struct nlattr *infoattr;
7830
7831         /* skip radio stats if userspace didn't request them */
7832         if (!survey->channel && !allow_radio_stats)
7833                 return 0;
7834
7835         hdr = nl80211hdr_put(msg, portid, seq, flags,
7836                              NL80211_CMD_NEW_SURVEY_RESULTS);
7837         if (!hdr)
7838                 return -ENOMEM;
7839
7840         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
7841                 goto nla_put_failure;
7842
7843         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
7844         if (!infoattr)
7845                 goto nla_put_failure;
7846
7847         if (survey->channel &&
7848             nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
7849                         survey->channel->center_freq))
7850                 goto nla_put_failure;
7851
7852         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
7853             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
7854                 goto nla_put_failure;
7855         if ((survey->filled & SURVEY_INFO_IN_USE) &&
7856             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
7857                 goto nla_put_failure;
7858         if ((survey->filled & SURVEY_INFO_TIME) &&
7859             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
7860                         survey->time, NL80211_SURVEY_INFO_PAD))
7861                 goto nla_put_failure;
7862         if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
7863             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
7864                               survey->time_busy, NL80211_SURVEY_INFO_PAD))
7865                 goto nla_put_failure;
7866         if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
7867             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
7868                               survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
7869                 goto nla_put_failure;
7870         if ((survey->filled & SURVEY_INFO_TIME_RX) &&
7871             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
7872                               survey->time_rx, NL80211_SURVEY_INFO_PAD))
7873                 goto nla_put_failure;
7874         if ((survey->filled & SURVEY_INFO_TIME_TX) &&
7875             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
7876                               survey->time_tx, NL80211_SURVEY_INFO_PAD))
7877                 goto nla_put_failure;
7878         if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
7879             nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
7880                               survey->time_scan, NL80211_SURVEY_INFO_PAD))
7881                 goto nla_put_failure;
7882
7883         nla_nest_end(msg, infoattr);
7884
7885         genlmsg_end(msg, hdr);
7886         return 0;
7887
7888  nla_put_failure:
7889         genlmsg_cancel(msg, hdr);
7890         return -EMSGSIZE;
7891 }
7892
7893 static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
7894 {
7895         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
7896         struct survey_info survey;
7897         struct cfg80211_registered_device *rdev;
7898         struct wireless_dev *wdev;
7899         int survey_idx = cb->args[2];
7900         int res;
7901         bool radio_stats;
7902
7903         rtnl_lock();
7904         res = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev);
7905         if (res)
7906                 goto out_err;
7907
7908         /* prepare_wdev_dump parsed the attributes */
7909         radio_stats = attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];
7910
7911         if (!wdev->netdev) {
7912                 res = -EINVAL;
7913                 goto out_err;
7914         }
7915
7916         if (!rdev->ops->dump_survey) {
7917                 res = -EOPNOTSUPP;
7918                 goto out_err;
7919         }
7920
7921         while (1) {
7922                 res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
7923                 if (res == -ENOENT)
7924                         break;
7925                 if (res)
7926                         goto out_err;
7927
7928                 /* don't send disabled channels, but do send non-channel data */
7929                 if (survey.channel &&
7930                     survey.channel->flags & IEEE80211_CHAN_DISABLED) {
7931                         survey_idx++;
7932                         continue;
7933                 }
7934
7935                 if (nl80211_send_survey(skb,
7936                                 NETLINK_CB(cb->skb).portid,
7937                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
7938                                 wdev->netdev, radio_stats, &survey) < 0)
7939                         goto out;
7940                 survey_idx++;
7941         }
7942
7943  out:
7944         cb->args[2] = survey_idx;
7945         res = skb->len;
7946  out_err:
7947         rtnl_unlock();
7948         return res;
7949 }
7950
7951 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
7952 {
7953         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
7954                                   NL80211_WPA_VERSION_2));
7955 }
7956
7957 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
7958 {
7959         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7960         struct net_device *dev = info->user_ptr[1];
7961         struct ieee80211_channel *chan;
7962         const u8 *bssid, *ssid, *ie = NULL, *auth_data = NULL;
7963         int err, ssid_len, ie_len = 0, auth_data_len = 0;
7964         enum nl80211_auth_type auth_type;
7965         struct key_parse key;
7966         bool local_state_change;
7967
7968         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
7969                 return -EINVAL;
7970
7971         if (!info->attrs[NL80211_ATTR_MAC])
7972                 return -EINVAL;
7973
7974         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
7975                 return -EINVAL;
7976
7977         if (!info->attrs[NL80211_ATTR_SSID])
7978                 return -EINVAL;
7979
7980         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
7981                 return -EINVAL;
7982
7983         err = nl80211_parse_key(info, &key);
7984         if (err)
7985                 return err;
7986
7987         if (key.idx >= 0) {
7988                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
7989                         return -EINVAL;
7990                 if (!key.p.key || !key.p.key_len)
7991                         return -EINVAL;
7992                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
7993                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
7994                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
7995                      key.p.key_len != WLAN_KEY_LEN_WEP104))
7996                         return -EINVAL;
7997                 if (key.idx > 3)
7998                         return -EINVAL;
7999         } else {
8000                 key.p.key_len = 0;
8001                 key.p.key = NULL;
8002         }
8003
8004         if (key.idx >= 0) {
8005                 int i;
8006                 bool ok = false;
8007
8008                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
8009                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
8010                                 ok = true;
8011                                 break;
8012                         }
8013                 }
8014                 if (!ok)
8015                         return -EINVAL;
8016         }
8017
8018         if (!rdev->ops->auth)
8019                 return -EOPNOTSUPP;
8020
8021         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8022             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8023                 return -EOPNOTSUPP;
8024
8025         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8026         chan = nl80211_get_valid_chan(&rdev->wiphy,
8027                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8028         if (!chan)
8029                 return -EINVAL;
8030
8031         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8032         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8033
8034         if (info->attrs[NL80211_ATTR_IE]) {
8035                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8036                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8037         }
8038
8039         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8040         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
8041                 return -EINVAL;
8042
8043         if ((auth_type == NL80211_AUTHTYPE_SAE ||
8044              auth_type == NL80211_AUTHTYPE_FILS_SK ||
8045              auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
8046              auth_type == NL80211_AUTHTYPE_FILS_PK) &&
8047             !info->attrs[NL80211_ATTR_AUTH_DATA])
8048                 return -EINVAL;
8049
8050         if (info->attrs[NL80211_ATTR_AUTH_DATA]) {
8051                 if (auth_type != NL80211_AUTHTYPE_SAE &&
8052                     auth_type != NL80211_AUTHTYPE_FILS_SK &&
8053                     auth_type != NL80211_AUTHTYPE_FILS_SK_PFS &&
8054                     auth_type != NL80211_AUTHTYPE_FILS_PK)
8055                         return -EINVAL;
8056                 auth_data = nla_data(info->attrs[NL80211_ATTR_AUTH_DATA]);
8057                 auth_data_len = nla_len(info->attrs[NL80211_ATTR_AUTH_DATA]);
8058                 /* need to include at least Auth Transaction and Status Code */
8059                 if (auth_data_len < 4)
8060                         return -EINVAL;
8061         }
8062
8063         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8064
8065         /*
8066          * Since we no longer track auth state, ignore
8067          * requests to only change local state.
8068          */
8069         if (local_state_change)
8070                 return 0;
8071
8072         wdev_lock(dev->ieee80211_ptr);
8073         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
8074                                  ssid, ssid_len, ie, ie_len,
8075                                  key.p.key, key.p.key_len, key.idx,
8076                                  auth_data, auth_data_len);
8077         wdev_unlock(dev->ieee80211_ptr);
8078         return err;
8079 }
8080
8081 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
8082                                    struct genl_info *info,
8083                                    struct cfg80211_crypto_settings *settings,
8084                                    int cipher_limit)
8085 {
8086         memset(settings, 0, sizeof(*settings));
8087
8088         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
8089
8090         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
8091                 u16 proto;
8092
8093                 proto = nla_get_u16(
8094                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
8095                 settings->control_port_ethertype = cpu_to_be16(proto);
8096                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
8097                     proto != ETH_P_PAE)
8098                         return -EINVAL;
8099                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
8100                         settings->control_port_no_encrypt = true;
8101         } else
8102                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
8103
8104         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
8105                 void *data;
8106                 int len, i;
8107
8108                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
8109                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
8110                 settings->n_ciphers_pairwise = len / sizeof(u32);
8111
8112                 if (len % sizeof(u32))
8113                         return -EINVAL;
8114
8115                 if (settings->n_ciphers_pairwise > cipher_limit)
8116                         return -EINVAL;
8117
8118                 memcpy(settings->ciphers_pairwise, data, len);
8119
8120                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
8121                         if (!cfg80211_supported_cipher_suite(
8122                                         &rdev->wiphy,
8123                                         settings->ciphers_pairwise[i]))
8124                                 return -EINVAL;
8125         }
8126
8127         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
8128                 settings->cipher_group =
8129                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
8130                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
8131                                                      settings->cipher_group))
8132                         return -EINVAL;
8133         }
8134
8135         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
8136                 settings->wpa_versions =
8137                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
8138                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
8139                         return -EINVAL;
8140         }
8141
8142         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
8143                 void *data;
8144                 int len;
8145
8146                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
8147                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
8148                 settings->n_akm_suites = len / sizeof(u32);
8149
8150                 if (len % sizeof(u32))
8151                         return -EINVAL;
8152
8153                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
8154                         return -EINVAL;
8155
8156                 memcpy(settings->akm_suites, data, len);
8157         }
8158
8159         return 0;
8160 }
8161
8162 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
8163 {
8164         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8165         struct net_device *dev = info->user_ptr[1];
8166         struct ieee80211_channel *chan;
8167         struct cfg80211_assoc_request req = {};
8168         const u8 *bssid, *ssid;
8169         int err, ssid_len = 0;
8170
8171         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8172                 return -EINVAL;
8173
8174         if (!info->attrs[NL80211_ATTR_MAC] ||
8175             !info->attrs[NL80211_ATTR_SSID] ||
8176             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
8177                 return -EINVAL;
8178
8179         if (!rdev->ops->assoc)
8180                 return -EOPNOTSUPP;
8181
8182         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8183             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8184                 return -EOPNOTSUPP;
8185
8186         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8187
8188         chan = nl80211_get_valid_chan(&rdev->wiphy,
8189                                       info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8190         if (!chan)
8191                 return -EINVAL;
8192
8193         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8194         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8195
8196         if (info->attrs[NL80211_ATTR_IE]) {
8197                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8198                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8199         }
8200
8201         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8202                 enum nl80211_mfp mfp =
8203                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8204                 if (mfp == NL80211_MFP_REQUIRED)
8205                         req.use_mfp = true;
8206                 else if (mfp != NL80211_MFP_NO)
8207                         return -EINVAL;
8208         }
8209
8210         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8211                 req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8212
8213         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8214                 req.flags |= ASSOC_REQ_DISABLE_HT;
8215
8216         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8217                 memcpy(&req.ht_capa_mask,
8218                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8219                        sizeof(req.ht_capa_mask));
8220
8221         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8222                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8223                         return -EINVAL;
8224                 memcpy(&req.ht_capa,
8225                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8226                        sizeof(req.ht_capa));
8227         }
8228
8229         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8230                 req.flags |= ASSOC_REQ_DISABLE_VHT;
8231
8232         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8233                 memcpy(&req.vht_capa_mask,
8234                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8235                        sizeof(req.vht_capa_mask));
8236
8237         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8238                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8239                         return -EINVAL;
8240                 memcpy(&req.vht_capa,
8241                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8242                        sizeof(req.vht_capa));
8243         }
8244
8245         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8246                 if (!((rdev->wiphy.features &
8247                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8248                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8249                     !wiphy_ext_feature_isset(&rdev->wiphy,
8250                                              NL80211_EXT_FEATURE_RRM))
8251                         return -EINVAL;
8252                 req.flags |= ASSOC_REQ_USE_RRM;
8253         }
8254
8255         if (info->attrs[NL80211_ATTR_FILS_KEK]) {
8256                 req.fils_kek = nla_data(info->attrs[NL80211_ATTR_FILS_KEK]);
8257                 req.fils_kek_len = nla_len(info->attrs[NL80211_ATTR_FILS_KEK]);
8258                 if (!info->attrs[NL80211_ATTR_FILS_NONCES])
8259                         return -EINVAL;
8260                 req.fils_nonces =
8261                         nla_data(info->attrs[NL80211_ATTR_FILS_NONCES]);
8262         }
8263
8264         err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
8265         if (!err) {
8266                 wdev_lock(dev->ieee80211_ptr);
8267
8268                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,
8269                                           ssid, ssid_len, &req);
8270
8271                 if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
8272                         dev->ieee80211_ptr->conn_owner_nlportid =
8273                                 info->snd_portid;
8274                         memcpy(dev->ieee80211_ptr->disconnect_bssid,
8275                                bssid, ETH_ALEN);
8276                 }
8277
8278                 wdev_unlock(dev->ieee80211_ptr);
8279         }
8280
8281         return err;
8282 }
8283
8284 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
8285 {
8286         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8287         struct net_device *dev = info->user_ptr[1];
8288         const u8 *ie = NULL, *bssid;
8289         int ie_len = 0, err;
8290         u16 reason_code;
8291         bool local_state_change;
8292
8293         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8294                 return -EINVAL;
8295
8296         if (!info->attrs[NL80211_ATTR_MAC])
8297                 return -EINVAL;
8298
8299         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8300                 return -EINVAL;
8301
8302         if (!rdev->ops->deauth)
8303                 return -EOPNOTSUPP;
8304
8305         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8306             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8307                 return -EOPNOTSUPP;
8308
8309         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8310
8311         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8312         if (reason_code == 0) {
8313                 /* Reason Code 0 is reserved */
8314                 return -EINVAL;
8315         }
8316
8317         if (info->attrs[NL80211_ATTR_IE]) {
8318                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8319                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8320         }
8321
8322         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8323
8324         wdev_lock(dev->ieee80211_ptr);
8325         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
8326                                    local_state_change);
8327         wdev_unlock(dev->ieee80211_ptr);
8328         return err;
8329 }
8330
8331 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
8332 {
8333         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8334         struct net_device *dev = info->user_ptr[1];
8335         const u8 *ie = NULL, *bssid;
8336         int ie_len = 0, err;
8337         u16 reason_code;
8338         bool local_state_change;
8339
8340         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8341                 return -EINVAL;
8342
8343         if (!info->attrs[NL80211_ATTR_MAC])
8344                 return -EINVAL;
8345
8346         if (!info->attrs[NL80211_ATTR_REASON_CODE])
8347                 return -EINVAL;
8348
8349         if (!rdev->ops->disassoc)
8350                 return -EOPNOTSUPP;
8351
8352         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8353             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8354                 return -EOPNOTSUPP;
8355
8356         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8357
8358         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
8359         if (reason_code == 0) {
8360                 /* Reason Code 0 is reserved */
8361                 return -EINVAL;
8362         }
8363
8364         if (info->attrs[NL80211_ATTR_IE]) {
8365                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8366                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8367         }
8368
8369         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
8370
8371         wdev_lock(dev->ieee80211_ptr);
8372         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
8373                                      local_state_change);
8374         wdev_unlock(dev->ieee80211_ptr);
8375         return err;
8376 }
8377
8378 static bool
8379 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
8380                          int mcast_rate[NUM_NL80211_BANDS],
8381                          int rateval)
8382 {
8383         struct wiphy *wiphy = &rdev->wiphy;
8384         bool found = false;
8385         int band, i;
8386
8387         for (band = 0; band < NUM_NL80211_BANDS; band++) {
8388                 struct ieee80211_supported_band *sband;
8389
8390                 sband = wiphy->bands[band];
8391                 if (!sband)
8392                         continue;
8393
8394                 for (i = 0; i < sband->n_bitrates; i++) {
8395                         if (sband->bitrates[i].bitrate == rateval) {
8396                                 mcast_rate[band] = i + 1;
8397                                 found = true;
8398                                 break;
8399                         }
8400                 }
8401         }
8402
8403         return found;
8404 }
8405
8406 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
8407 {
8408         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8409         struct net_device *dev = info->user_ptr[1];
8410         struct cfg80211_ibss_params ibss;
8411         struct wiphy *wiphy;
8412         struct cfg80211_cached_keys *connkeys = NULL;
8413         int err;
8414
8415         memset(&ibss, 0, sizeof(ibss));
8416
8417         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8418                 return -EINVAL;
8419
8420         if (!info->attrs[NL80211_ATTR_SSID] ||
8421             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8422                 return -EINVAL;
8423
8424         ibss.beacon_interval = 100;
8425
8426         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
8427                 ibss.beacon_interval =
8428                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
8429
8430         err = cfg80211_validate_beacon_int(rdev, NL80211_IFTYPE_ADHOC,
8431                                            ibss.beacon_interval);
8432         if (err)
8433                 return err;
8434
8435         if (!rdev->ops->join_ibss)
8436                 return -EOPNOTSUPP;
8437
8438         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8439                 return -EOPNOTSUPP;
8440
8441         wiphy = &rdev->wiphy;
8442
8443         if (info->attrs[NL80211_ATTR_MAC]) {
8444                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8445
8446                 if (!is_valid_ether_addr(ibss.bssid))
8447                         return -EINVAL;
8448         }
8449         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8450         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8451
8452         if (info->attrs[NL80211_ATTR_IE]) {
8453                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8454                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8455         }
8456
8457         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
8458         if (err)
8459                 return err;
8460
8461         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
8462                                      NL80211_IFTYPE_ADHOC))
8463                 return -EINVAL;
8464
8465         switch (ibss.chandef.width) {
8466         case NL80211_CHAN_WIDTH_5:
8467         case NL80211_CHAN_WIDTH_10:
8468         case NL80211_CHAN_WIDTH_20_NOHT:
8469                 break;
8470         case NL80211_CHAN_WIDTH_20:
8471         case NL80211_CHAN_WIDTH_40:
8472                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8473                         return -EINVAL;
8474                 break;
8475         case NL80211_CHAN_WIDTH_80:
8476         case NL80211_CHAN_WIDTH_80P80:
8477         case NL80211_CHAN_WIDTH_160:
8478                 if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
8479                         return -EINVAL;
8480                 if (!wiphy_ext_feature_isset(&rdev->wiphy,
8481                                              NL80211_EXT_FEATURE_VHT_IBSS))
8482                         return -EINVAL;
8483                 break;
8484         default:
8485                 return -EINVAL;
8486         }
8487
8488         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
8489         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
8490
8491         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
8492                 u8 *rates =
8493                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8494                 int n_rates =
8495                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
8496                 struct ieee80211_supported_band *sband =
8497                         wiphy->bands[ibss.chandef.chan->band];
8498
8499                 err = ieee80211_get_ratemask(sband, rates, n_rates,
8500                                              &ibss.basic_rates);
8501                 if (err)
8502                         return err;
8503         }
8504
8505         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8506                 memcpy(&ibss.ht_capa_mask,
8507                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8508                        sizeof(ibss.ht_capa_mask));
8509
8510         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8511                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8512                         return -EINVAL;
8513                 memcpy(&ibss.ht_capa,
8514                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8515                        sizeof(ibss.ht_capa));
8516         }
8517
8518         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
8519             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
8520                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
8521                 return -EINVAL;
8522
8523         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8524                 bool no_ht = false;
8525
8526                 connkeys = nl80211_parse_connkeys(rdev,
8527                                           info->attrs[NL80211_ATTR_KEYS],
8528                                           &no_ht);
8529                 if (IS_ERR(connkeys))
8530                         return PTR_ERR(connkeys);
8531
8532                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
8533                     no_ht) {
8534                         kzfree(connkeys);
8535                         return -EINVAL;
8536                 }
8537         }
8538
8539         ibss.control_port =
8540                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
8541
8542         ibss.userspace_handles_dfs =
8543                 nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);
8544
8545         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
8546         if (err)
8547                 kzfree(connkeys);
8548         return err;
8549 }
8550
8551 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
8552 {
8553         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8554         struct net_device *dev = info->user_ptr[1];
8555
8556         if (!rdev->ops->leave_ibss)
8557                 return -EOPNOTSUPP;
8558
8559         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
8560                 return -EOPNOTSUPP;
8561
8562         return cfg80211_leave_ibss(rdev, dev, false);
8563 }
8564
8565 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
8566 {
8567         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8568         struct net_device *dev = info->user_ptr[1];
8569         int mcast_rate[NUM_NL80211_BANDS];
8570         u32 nla_rate;
8571         int err;
8572
8573         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
8574             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
8575             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
8576                 return -EOPNOTSUPP;
8577
8578         if (!rdev->ops->set_mcast_rate)
8579                 return -EOPNOTSUPP;
8580
8581         memset(mcast_rate, 0, sizeof(mcast_rate));
8582
8583         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
8584                 return -EINVAL;
8585
8586         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
8587         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
8588                 return -EINVAL;
8589
8590         err = rdev_set_mcast_rate(rdev, dev, mcast_rate);
8591
8592         return err;
8593 }
8594
8595 static struct sk_buff *
8596 __cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
8597                             struct wireless_dev *wdev, int approxlen,
8598                             u32 portid, u32 seq, enum nl80211_commands cmd,
8599                             enum nl80211_attrs attr,
8600                             const struct nl80211_vendor_cmd_info *info,
8601                             gfp_t gfp)
8602 {
8603         struct sk_buff *skb;
8604         void *hdr;
8605         struct nlattr *data;
8606
8607         skb = nlmsg_new(approxlen + 100, gfp);
8608         if (!skb)
8609                 return NULL;
8610
8611         hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
8612         if (!hdr) {
8613                 kfree_skb(skb);
8614                 return NULL;
8615         }
8616
8617         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
8618                 goto nla_put_failure;
8619
8620         if (info) {
8621                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
8622                                 info->vendor_id))
8623                         goto nla_put_failure;
8624                 if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
8625                                 info->subcmd))
8626                         goto nla_put_failure;
8627         }
8628
8629         if (wdev) {
8630                 if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
8631                                       wdev_id(wdev), NL80211_ATTR_PAD))
8632                         goto nla_put_failure;
8633                 if (wdev->netdev &&
8634                     nla_put_u32(skb, NL80211_ATTR_IFINDEX,
8635                                 wdev->netdev->ifindex))
8636                         goto nla_put_failure;
8637         }
8638
8639         data = nla_nest_start(skb, attr);
8640         if (!data)
8641                 goto nla_put_failure;
8642
8643         ((void **)skb->cb)[0] = rdev;
8644         ((void **)skb->cb)[1] = hdr;
8645         ((void **)skb->cb)[2] = data;
8646
8647         return skb;
8648
8649  nla_put_failure:
8650         kfree_skb(skb);
8651         return NULL;
8652 }
8653
8654 struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
8655                                            struct wireless_dev *wdev,
8656                                            enum nl80211_commands cmd,
8657                                            enum nl80211_attrs attr,
8658                                            int vendor_event_idx,
8659                                            int approxlen, gfp_t gfp)
8660 {
8661         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
8662         const struct nl80211_vendor_cmd_info *info;
8663
8664         switch (cmd) {
8665         case NL80211_CMD_TESTMODE:
8666                 if (WARN_ON(vendor_event_idx != -1))
8667                         return NULL;
8668                 info = NULL;
8669                 break;
8670         case NL80211_CMD_VENDOR:
8671                 if (WARN_ON(vendor_event_idx < 0 ||
8672                             vendor_event_idx >= wiphy->n_vendor_events))
8673                         return NULL;
8674                 info = &wiphy->vendor_events[vendor_event_idx];
8675                 break;
8676         default:
8677                 WARN_ON(1);
8678                 return NULL;
8679         }
8680
8681         return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, 0, 0,
8682                                            cmd, attr, info, gfp);
8683 }
8684 EXPORT_SYMBOL(__cfg80211_alloc_event_skb);
8685
8686 void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
8687 {
8688         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
8689         void *hdr = ((void **)skb->cb)[1];
8690         struct nlattr *data = ((void **)skb->cb)[2];
8691         enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;
8692
8693         /* clear CB data for netlink core to own from now on */
8694         memset(skb->cb, 0, sizeof(skb->cb));
8695
8696         nla_nest_end(skb, data);
8697         genlmsg_end(skb, hdr);
8698
8699         if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
8700                 mcgrp = NL80211_MCGRP_VENDOR;
8701
8702         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), skb, 0,
8703                                 mcgrp, gfp);
8704 }
8705 EXPORT_SYMBOL(__cfg80211_send_event_skb);
8706
8707 #ifdef CONFIG_NL80211_TESTMODE
8708 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
8709 {
8710         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8711         struct wireless_dev *wdev =
8712                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
8713         int err;
8714
8715         if (!rdev->ops->testmode_cmd)
8716                 return -EOPNOTSUPP;
8717
8718         if (IS_ERR(wdev)) {
8719                 err = PTR_ERR(wdev);
8720                 if (err != -EINVAL)
8721                         return err;
8722                 wdev = NULL;
8723         } else if (wdev->wiphy != &rdev->wiphy) {
8724                 return -EINVAL;
8725         }
8726
8727         if (!info->attrs[NL80211_ATTR_TESTDATA])
8728                 return -EINVAL;
8729
8730         rdev->cur_cmd_info = info;
8731         err = rdev_testmode_cmd(rdev, wdev,
8732                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
8733                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
8734         rdev->cur_cmd_info = NULL;
8735
8736         return err;
8737 }
8738
8739 static int nl80211_testmode_dump(struct sk_buff *skb,
8740                                  struct netlink_callback *cb)
8741 {
8742         struct cfg80211_registered_device *rdev;
8743         int err;
8744         long phy_idx;
8745         void *data = NULL;
8746         int data_len = 0;
8747
8748         rtnl_lock();
8749
8750         if (cb->args[0]) {
8751                 /*
8752                  * 0 is a valid index, but not valid for args[0],
8753                  * so we need to offset by 1.
8754                  */
8755                 phy_idx = cb->args[0] - 1;
8756
8757                 rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
8758                 if (!rdev) {
8759                         err = -ENOENT;
8760                         goto out_err;
8761                 }
8762         } else {
8763                 struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
8764
8765                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
8766                                   attrbuf, nl80211_fam.maxattr,
8767                                   nl80211_policy, NULL);
8768                 if (err)
8769                         goto out_err;
8770
8771                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
8772                 if (IS_ERR(rdev)) {
8773                         err = PTR_ERR(rdev);
8774                         goto out_err;
8775                 }
8776                 phy_idx = rdev->wiphy_idx;
8777
8778                 if (attrbuf[NL80211_ATTR_TESTDATA])
8779                         cb->args[1] = (long)attrbuf[NL80211_ATTR_TESTDATA];
8780         }
8781
8782         if (cb->args[1]) {
8783                 data = nla_data((void *)cb->args[1]);
8784                 data_len = nla_len((void *)cb->args[1]);
8785         }
8786
8787         if (!rdev->ops->testmode_dump) {
8788                 err = -EOPNOTSUPP;
8789                 goto out_err;
8790         }
8791
8792         while (1) {
8793                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
8794                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
8795                                            NL80211_CMD_TESTMODE);
8796                 struct nlattr *tmdata;
8797
8798                 if (!hdr)
8799                         break;
8800
8801                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
8802                         genlmsg_cancel(skb, hdr);
8803                         break;
8804                 }
8805
8806                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
8807                 if (!tmdata) {
8808                         genlmsg_cancel(skb, hdr);
8809                         break;
8810                 }
8811                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
8812                 nla_nest_end(skb, tmdata);
8813
8814                 if (err == -ENOBUFS || err == -ENOENT) {
8815                         genlmsg_cancel(skb, hdr);
8816                         break;
8817                 } else if (err) {
8818                         genlmsg_cancel(skb, hdr);
8819                         goto out_err;
8820                 }
8821
8822                 genlmsg_end(skb, hdr);
8823         }
8824
8825         err = skb->len;
8826         /* see above */
8827         cb->args[0] = phy_idx + 1;
8828  out_err:
8829         rtnl_unlock();
8830         return err;
8831 }
8832 #endif
8833
8834 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
8835 {
8836         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8837         struct net_device *dev = info->user_ptr[1];
8838         struct cfg80211_connect_params connect;
8839         struct wiphy *wiphy;
8840         struct cfg80211_cached_keys *connkeys = NULL;
8841         int err;
8842
8843         memset(&connect, 0, sizeof(connect));
8844
8845         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
8846                 return -EINVAL;
8847
8848         if (!info->attrs[NL80211_ATTR_SSID] ||
8849             !nla_len(info->attrs[NL80211_ATTR_SSID]))
8850                 return -EINVAL;
8851
8852         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
8853                 connect.auth_type =
8854                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
8855                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
8856                                              NL80211_CMD_CONNECT))
8857                         return -EINVAL;
8858         } else
8859                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
8860
8861         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
8862
8863         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
8864                                       NL80211_MAX_NR_CIPHER_SUITES);
8865         if (err)
8866                 return err;
8867
8868         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
8869             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
8870                 return -EOPNOTSUPP;
8871
8872         wiphy = &rdev->wiphy;
8873
8874         connect.bg_scan_period = -1;
8875         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
8876                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
8877                 connect.bg_scan_period =
8878                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
8879         }
8880
8881         if (info->attrs[NL80211_ATTR_MAC])
8882                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
8883         else if (info->attrs[NL80211_ATTR_MAC_HINT])
8884                 connect.bssid_hint =
8885                         nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
8886         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
8887         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
8888
8889         if (info->attrs[NL80211_ATTR_IE]) {
8890                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
8891                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
8892         }
8893
8894         if (info->attrs[NL80211_ATTR_USE_MFP]) {
8895                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
8896                 if (connect.mfp != NL80211_MFP_REQUIRED &&
8897                     connect.mfp != NL80211_MFP_NO)
8898                         return -EINVAL;
8899         } else {
8900                 connect.mfp = NL80211_MFP_NO;
8901         }
8902
8903         if (info->attrs[NL80211_ATTR_PREV_BSSID])
8904                 connect.prev_bssid =
8905                         nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
8906
8907         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
8908                 connect.channel = nl80211_get_valid_chan(
8909                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ]);
8910                 if (!connect.channel)
8911                         return -EINVAL;
8912         } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
8913                 connect.channel_hint = nl80211_get_valid_chan(
8914                         wiphy, info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
8915                 if (!connect.channel_hint)
8916                         return -EINVAL;
8917         }
8918
8919         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
8920                 connkeys = nl80211_parse_connkeys(rdev,
8921                                           info->attrs[NL80211_ATTR_KEYS], NULL);
8922                 if (IS_ERR(connkeys))
8923                         return PTR_ERR(connkeys);
8924         }
8925
8926         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
8927                 connect.flags |= ASSOC_REQ_DISABLE_HT;
8928
8929         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
8930                 memcpy(&connect.ht_capa_mask,
8931                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
8932                        sizeof(connect.ht_capa_mask));
8933
8934         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
8935                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
8936                         kzfree(connkeys);
8937                         return -EINVAL;
8938                 }
8939                 memcpy(&connect.ht_capa,
8940                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
8941                        sizeof(connect.ht_capa));
8942         }
8943
8944         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
8945                 connect.flags |= ASSOC_REQ_DISABLE_VHT;
8946
8947         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
8948                 memcpy(&connect.vht_capa_mask,
8949                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
8950                        sizeof(connect.vht_capa_mask));
8951
8952         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
8953                 if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
8954                         kzfree(connkeys);
8955                         return -EINVAL;
8956                 }
8957                 memcpy(&connect.vht_capa,
8958                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
8959                        sizeof(connect.vht_capa));
8960         }
8961
8962         if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
8963                 if (!((rdev->wiphy.features &
8964                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
8965                        (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
8966                     !wiphy_ext_feature_isset(&rdev->wiphy,
8967                                              NL80211_EXT_FEATURE_RRM)) {
8968                         kzfree(connkeys);
8969                         return -EINVAL;
8970                 }
8971                 connect.flags |= ASSOC_REQ_USE_RRM;
8972         }
8973
8974         connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
8975         if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
8976                 kzfree(connkeys);
8977                 return -EOPNOTSUPP;
8978         }
8979
8980         if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
8981                 /* bss selection makes no sense if bssid is set */
8982                 if (connect.bssid) {
8983                         kzfree(connkeys);
8984                         return -EINVAL;
8985                 }
8986
8987                 err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
8988                                        wiphy, &connect.bss_select);
8989                 if (err) {
8990                         kzfree(connkeys);
8991                         return err;
8992                 }
8993         }
8994
8995         if (wiphy_ext_feature_isset(&rdev->wiphy,
8996                                     NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
8997             info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] &&
8998             info->attrs[NL80211_ATTR_FILS_ERP_REALM] &&
8999             info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] &&
9000             info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
9001                 connect.fils_erp_username =
9002                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
9003                 connect.fils_erp_username_len =
9004                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
9005                 connect.fils_erp_realm =
9006                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
9007                 connect.fils_erp_realm_len =
9008                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
9009                 connect.fils_erp_next_seq_num =
9010                         nla_get_u16(
9011                            info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM]);
9012                 connect.fils_erp_rrk =
9013                         nla_data(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
9014                 connect.fils_erp_rrk_len =
9015                         nla_len(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
9016         } else if (info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] ||
9017                    info->attrs[NL80211_ATTR_FILS_ERP_REALM] ||
9018                    info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] ||
9019                    info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
9020                 kzfree(connkeys);
9021                 return -EINVAL;
9022         }
9023
9024         wdev_lock(dev->ieee80211_ptr);
9025
9026         err = cfg80211_connect(rdev, dev, &connect, connkeys,
9027                                connect.prev_bssid);
9028         if (err)
9029                 kzfree(connkeys);
9030
9031         if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
9032                 dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;
9033                 if (connect.bssid)
9034                         memcpy(dev->ieee80211_ptr->disconnect_bssid,
9035                                connect.bssid, ETH_ALEN);
9036                 else
9037                         memset(dev->ieee80211_ptr->disconnect_bssid,
9038                                0, ETH_ALEN);
9039         }
9040
9041         wdev_unlock(dev->ieee80211_ptr);
9042
9043         return err;
9044 }
9045
9046 static int nl80211_update_connect_params(struct sk_buff *skb,
9047                                          struct genl_info *info)
9048 {
9049         struct cfg80211_connect_params connect = {};
9050         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9051         struct net_device *dev = info->user_ptr[1];
9052         struct wireless_dev *wdev = dev->ieee80211_ptr;
9053         u32 changed = 0;
9054         int ret;
9055
9056         if (!rdev->ops->update_connect_params)
9057                 return -EOPNOTSUPP;
9058
9059         if (info->attrs[NL80211_ATTR_IE]) {
9060                 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
9061                         return -EINVAL;
9062                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
9063                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
9064                 changed |= UPDATE_ASSOC_IES;
9065         }
9066
9067         wdev_lock(dev->ieee80211_ptr);
9068         if (!wdev->current_bss)
9069                 ret = -ENOLINK;
9070         else
9071                 ret = rdev_update_connect_params(rdev, dev, &connect, changed);
9072         wdev_unlock(dev->ieee80211_ptr);
9073
9074         return ret;
9075 }
9076
9077 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
9078 {
9079         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9080         struct net_device *dev = info->user_ptr[1];
9081         u16 reason;
9082         int ret;
9083
9084         if (!info->attrs[NL80211_ATTR_REASON_CODE])
9085                 reason = WLAN_REASON_DEAUTH_LEAVING;
9086         else
9087                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
9088
9089         if (reason == 0)
9090                 return -EINVAL;
9091
9092         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9093             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9094                 return -EOPNOTSUPP;
9095
9096         wdev_lock(dev->ieee80211_ptr);
9097         ret = cfg80211_disconnect(rdev, dev, reason, true);
9098         wdev_unlock(dev->ieee80211_ptr);
9099         return ret;
9100 }
9101
9102 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
9103 {
9104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9105         struct net *net;
9106         int err;
9107
9108         if (info->attrs[NL80211_ATTR_PID]) {
9109                 u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
9110
9111                 net = get_net_ns_by_pid(pid);
9112         } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
9113                 u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);
9114
9115                 net = get_net_ns_by_fd(fd);
9116         } else {
9117                 return -EINVAL;
9118         }
9119
9120         if (IS_ERR(net))
9121                 return PTR_ERR(net);
9122
9123         err = 0;
9124
9125         /* check if anything to do */
9126         if (!net_eq(wiphy_net(&rdev->wiphy), net))
9127                 err = cfg80211_switch_netns(rdev, net);
9128
9129         put_net(net);
9130         return err;
9131 }
9132
9133 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
9134 {
9135         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9136         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
9137                         struct cfg80211_pmksa *pmksa) = NULL;
9138         struct net_device *dev = info->user_ptr[1];
9139         struct cfg80211_pmksa pmksa;
9140
9141         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
9142
9143         if (!info->attrs[NL80211_ATTR_PMKID])
9144                 return -EINVAL;
9145
9146         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
9147
9148         if (info->attrs[NL80211_ATTR_MAC]) {
9149                 pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
9150         } else if (info->attrs[NL80211_ATTR_SSID] &&
9151                    info->attrs[NL80211_ATTR_FILS_CACHE_ID] &&
9152                    (info->genlhdr->cmd == NL80211_CMD_DEL_PMKSA ||
9153                     info->attrs[NL80211_ATTR_PMK])) {
9154                 pmksa.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
9155                 pmksa.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
9156                 pmksa.cache_id =
9157                         nla_data(info->attrs[NL80211_ATTR_FILS_CACHE_ID]);
9158         } else {
9159                 return -EINVAL;
9160         }
9161         if (info->attrs[NL80211_ATTR_PMK]) {
9162                 pmksa.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
9163                 pmksa.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
9164         }
9165
9166         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9167             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9168                 return -EOPNOTSUPP;
9169
9170         switch (info->genlhdr->cmd) {
9171         case NL80211_CMD_SET_PMKSA:
9172                 rdev_ops = rdev->ops->set_pmksa;
9173                 break;
9174         case NL80211_CMD_DEL_PMKSA:
9175                 rdev_ops = rdev->ops->del_pmksa;
9176                 break;
9177         default:
9178                 WARN_ON(1);
9179                 break;
9180         }
9181
9182         if (!rdev_ops)
9183                 return -EOPNOTSUPP;
9184
9185         return rdev_ops(&rdev->wiphy, dev, &pmksa);
9186 }
9187
9188 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
9189 {
9190         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9191         struct net_device *dev = info->user_ptr[1];
9192
9193         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
9194             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
9195                 return -EOPNOTSUPP;
9196
9197         if (!rdev->ops->flush_pmksa)
9198                 return -EOPNOTSUPP;
9199
9200         return rdev_flush_pmksa(rdev, dev);
9201 }
9202
9203 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
9204 {
9205         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9206         struct net_device *dev = info->user_ptr[1];
9207         u8 action_code, dialog_token;
9208         u32 peer_capability = 0;
9209         u16 status_code;
9210         u8 *peer;
9211         bool initiator;
9212
9213         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
9214             !rdev->ops->tdls_mgmt)
9215                 return -EOPNOTSUPP;
9216
9217         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
9218             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
9219             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
9220             !info->attrs[NL80211_ATTR_IE] ||
9221             !info->attrs[NL80211_ATTR_MAC])
9222                 return -EINVAL;
9223
9224         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9225         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
9226         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
9227         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
9228         initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
9229         if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
9230                 peer_capability =
9231                         nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
9232
9233         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
9234                               dialog_token, status_code, peer_capability,
9235                               initiator,
9236                               nla_data(info->attrs[NL80211_ATTR_IE]),
9237                               nla_len(info->attrs[NL80211_ATTR_IE]));
9238 }
9239
9240 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
9241 {
9242         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9243         struct net_device *dev = info->user_ptr[1];
9244         enum nl80211_tdls_operation operation;
9245         u8 *peer;
9246
9247         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
9248             !rdev->ops->tdls_oper)
9249                 return -EOPNOTSUPP;
9250
9251         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
9252             !info->attrs[NL80211_ATTR_MAC])
9253                 return -EINVAL;
9254
9255         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
9256         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
9257
9258         return rdev_tdls_oper(rdev, dev, peer, operation);
9259 }
9260
9261 static int nl80211_remain_on_channel(struct sk_buff *skb,
9262                                      struct genl_info *info)
9263 {
9264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9265         struct wireless_dev *wdev = info->user_ptr[1];
9266         struct cfg80211_chan_def chandef;
9267         const struct cfg80211_chan_def *compat_chandef;
9268         struct sk_buff *msg;
9269         void *hdr;
9270         u64 cookie;
9271         u32 duration;
9272         int err;
9273
9274         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
9275             !info->attrs[NL80211_ATTR_DURATION])
9276                 return -EINVAL;
9277
9278         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9279
9280         if (!rdev->ops->remain_on_channel ||
9281             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
9282                 return -EOPNOTSUPP;
9283
9284         /*
9285          * We should be on that channel for at least a minimum amount of
9286          * time (10ms) but no longer than the driver supports.
9287          */
9288         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9289             duration > rdev->wiphy.max_remain_on_channel_duration)
9290                 return -EINVAL;
9291
9292         err = nl80211_parse_chandef(rdev, info, &chandef);
9293         if (err)
9294                 return err;
9295
9296         wdev_lock(wdev);
9297         if (!cfg80211_off_channel_oper_allowed(wdev) &&
9298             !cfg80211_chandef_identical(&wdev->chandef, &chandef)) {
9299                 compat_chandef = cfg80211_chandef_compatible(&wdev->chandef,
9300                                                              &chandef);
9301                 if (compat_chandef != &chandef) {
9302                         wdev_unlock(wdev);
9303                         return -EBUSY;
9304                 }
9305         }
9306         wdev_unlock(wdev);
9307
9308         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9309         if (!msg)
9310                 return -ENOMEM;
9311
9312         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9313                              NL80211_CMD_REMAIN_ON_CHANNEL);
9314         if (!hdr) {
9315                 err = -ENOBUFS;
9316                 goto free_msg;
9317         }
9318
9319         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
9320                                      duration, &cookie);
9321
9322         if (err)
9323                 goto free_msg;
9324
9325         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9326                               NL80211_ATTR_PAD))
9327                 goto nla_put_failure;
9328
9329         genlmsg_end(msg, hdr);
9330
9331         return genlmsg_reply(msg, info);
9332
9333  nla_put_failure:
9334         err = -ENOBUFS;
9335  free_msg:
9336         nlmsg_free(msg);
9337         return err;
9338 }
9339
9340 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
9341                                             struct genl_info *info)
9342 {
9343         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9344         struct wireless_dev *wdev = info->user_ptr[1];
9345         u64 cookie;
9346
9347         if (!info->attrs[NL80211_ATTR_COOKIE])
9348                 return -EINVAL;
9349
9350         if (!rdev->ops->cancel_remain_on_channel)
9351                 return -EOPNOTSUPP;
9352
9353         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9354
9355         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
9356 }
9357
9358 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
9359                                        struct genl_info *info)
9360 {
9361         struct cfg80211_bitrate_mask mask;
9362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9363         struct net_device *dev = info->user_ptr[1];
9364         int err;
9365
9366         if (!rdev->ops->set_bitrate_mask)
9367                 return -EOPNOTSUPP;
9368
9369         err = nl80211_parse_tx_bitrate_mask(info, &mask);
9370         if (err)
9371                 return err;
9372
9373         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
9374 }
9375
9376 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
9377 {
9378         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9379         struct wireless_dev *wdev = info->user_ptr[1];
9380         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
9381
9382         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
9383                 return -EINVAL;
9384
9385         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
9386                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
9387
9388         switch (wdev->iftype) {
9389         case NL80211_IFTYPE_STATION:
9390         case NL80211_IFTYPE_ADHOC:
9391         case NL80211_IFTYPE_P2P_CLIENT:
9392         case NL80211_IFTYPE_AP:
9393         case NL80211_IFTYPE_AP_VLAN:
9394         case NL80211_IFTYPE_MESH_POINT:
9395         case NL80211_IFTYPE_P2P_GO:
9396         case NL80211_IFTYPE_P2P_DEVICE:
9397                 break;
9398         case NL80211_IFTYPE_NAN:
9399         default:
9400                 return -EOPNOTSUPP;
9401         }
9402
9403         /* not much point in registering if we can't reply */
9404         if (!rdev->ops->mgmt_tx)
9405                 return -EOPNOTSUPP;
9406
9407         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
9408                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
9409                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
9410 }
9411
9412 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
9413 {
9414         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9415         struct wireless_dev *wdev = info->user_ptr[1];
9416         struct cfg80211_chan_def chandef;
9417         int err;
9418         void *hdr = NULL;
9419         u64 cookie;
9420         struct sk_buff *msg = NULL;
9421         struct cfg80211_mgmt_tx_params params = {
9422                 .dont_wait_for_ack =
9423                         info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
9424         };
9425
9426         if (!info->attrs[NL80211_ATTR_FRAME])
9427                 return -EINVAL;
9428
9429         if (!rdev->ops->mgmt_tx)
9430                 return -EOPNOTSUPP;
9431
9432         switch (wdev->iftype) {
9433         case NL80211_IFTYPE_P2P_DEVICE:
9434                 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
9435                         return -EINVAL;
9436         case NL80211_IFTYPE_STATION:
9437         case NL80211_IFTYPE_ADHOC:
9438         case NL80211_IFTYPE_P2P_CLIENT:
9439         case NL80211_IFTYPE_AP:
9440         case NL80211_IFTYPE_AP_VLAN:
9441         case NL80211_IFTYPE_MESH_POINT:
9442         case NL80211_IFTYPE_P2P_GO:
9443                 break;
9444         case NL80211_IFTYPE_NAN:
9445         default:
9446                 return -EOPNOTSUPP;
9447         }
9448
9449         if (info->attrs[NL80211_ATTR_DURATION]) {
9450                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9451                         return -EINVAL;
9452                 params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
9453
9454                 /*
9455                  * We should wait on the channel for at least a minimum amount
9456                  * of time (10ms) but no longer than the driver supports.
9457                  */
9458                 if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
9459                     params.wait > rdev->wiphy.max_remain_on_channel_duration)
9460                         return -EINVAL;
9461         }
9462
9463         params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
9464
9465         if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
9466                 return -EINVAL;
9467
9468         params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
9469
9470         /* get the channel if any has been specified, otherwise pass NULL to
9471          * the driver. The latter will use the current one
9472          */
9473         chandef.chan = NULL;
9474         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9475                 err = nl80211_parse_chandef(rdev, info, &chandef);
9476                 if (err)
9477                         return err;
9478         }
9479
9480         if (!chandef.chan && params.offchan)
9481                 return -EINVAL;
9482
9483         wdev_lock(wdev);
9484         if (params.offchan && !cfg80211_off_channel_oper_allowed(wdev)) {
9485                 wdev_unlock(wdev);
9486                 return -EBUSY;
9487         }
9488         wdev_unlock(wdev);
9489
9490         params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
9491         params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
9492
9493         if (info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]) {
9494                 int len = nla_len(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9495                 int i;
9496
9497                 if (len % sizeof(u16))
9498                         return -EINVAL;
9499
9500                 params.n_csa_offsets = len / sizeof(u16);
9501                 params.csa_offsets =
9502                         nla_data(info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX]);
9503
9504                 /* check that all the offsets fit the frame */
9505                 for (i = 0; i < params.n_csa_offsets; i++) {
9506                         if (params.csa_offsets[i] >= params.len)
9507                                 return -EINVAL;
9508                 }
9509         }
9510
9511         if (!params.dont_wait_for_ack) {
9512                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9513                 if (!msg)
9514                         return -ENOMEM;
9515
9516                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9517                                      NL80211_CMD_FRAME);
9518                 if (!hdr) {
9519                         err = -ENOBUFS;
9520                         goto free_msg;
9521                 }
9522         }
9523
9524         params.chan = chandef.chan;
9525         err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
9526         if (err)
9527                 goto free_msg;
9528
9529         if (msg) {
9530                 if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
9531                                       NL80211_ATTR_PAD))
9532                         goto nla_put_failure;
9533
9534                 genlmsg_end(msg, hdr);
9535                 return genlmsg_reply(msg, info);
9536         }
9537
9538         return 0;
9539
9540  nla_put_failure:
9541         err = -ENOBUFS;
9542  free_msg:
9543         nlmsg_free(msg);
9544         return err;
9545 }
9546
9547 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
9548 {
9549         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9550         struct wireless_dev *wdev = info->user_ptr[1];
9551         u64 cookie;
9552
9553         if (!info->attrs[NL80211_ATTR_COOKIE])
9554                 return -EINVAL;
9555
9556         if (!rdev->ops->mgmt_tx_cancel_wait)
9557                 return -EOPNOTSUPP;
9558
9559         switch (wdev->iftype) {
9560         case NL80211_IFTYPE_STATION:
9561         case NL80211_IFTYPE_ADHOC:
9562         case NL80211_IFTYPE_P2P_CLIENT:
9563         case NL80211_IFTYPE_AP:
9564         case NL80211_IFTYPE_AP_VLAN:
9565         case NL80211_IFTYPE_P2P_GO:
9566         case NL80211_IFTYPE_P2P_DEVICE:
9567                 break;
9568         case NL80211_IFTYPE_NAN:
9569         default:
9570                 return -EOPNOTSUPP;
9571         }
9572
9573         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
9574
9575         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
9576 }
9577
9578 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
9579 {
9580         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9581         struct wireless_dev *wdev;
9582         struct net_device *dev = info->user_ptr[1];
9583         u8 ps_state;
9584         bool state;
9585         int err;
9586
9587         if (!info->attrs[NL80211_ATTR_PS_STATE])
9588                 return -EINVAL;
9589
9590         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
9591
9592         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
9593                 return -EINVAL;
9594
9595         wdev = dev->ieee80211_ptr;
9596
9597         if (!rdev->ops->set_power_mgmt)
9598                 return -EOPNOTSUPP;
9599
9600         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
9601
9602         if (state == wdev->ps)
9603                 return 0;
9604
9605         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
9606         if (!err)
9607                 wdev->ps = state;
9608         return err;
9609 }
9610
9611 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
9612 {
9613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9614         enum nl80211_ps_state ps_state;
9615         struct wireless_dev *wdev;
9616         struct net_device *dev = info->user_ptr[1];
9617         struct sk_buff *msg;
9618         void *hdr;
9619         int err;
9620
9621         wdev = dev->ieee80211_ptr;
9622
9623         if (!rdev->ops->set_power_mgmt)
9624                 return -EOPNOTSUPP;
9625
9626         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9627         if (!msg)
9628                 return -ENOMEM;
9629
9630         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
9631                              NL80211_CMD_GET_POWER_SAVE);
9632         if (!hdr) {
9633                 err = -ENOBUFS;
9634                 goto free_msg;
9635         }
9636
9637         if (wdev->ps)
9638                 ps_state = NL80211_PS_ENABLED;
9639         else
9640                 ps_state = NL80211_PS_DISABLED;
9641
9642         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
9643                 goto nla_put_failure;
9644
9645         genlmsg_end(msg, hdr);
9646         return genlmsg_reply(msg, info);
9647
9648  nla_put_failure:
9649         err = -ENOBUFS;
9650  free_msg:
9651         nlmsg_free(msg);
9652         return err;
9653 }
9654
9655 static const struct nla_policy
9656 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
9657         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_BINARY },
9658         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
9659         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
9660         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
9661         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
9662         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
9663         [NL80211_ATTR_CQM_RSSI_LEVEL] = { .type = NLA_S32 },
9664 };
9665
9666 static int nl80211_set_cqm_txe(struct genl_info *info,
9667                                u32 rate, u32 pkts, u32 intvl)
9668 {
9669         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9670         struct net_device *dev = info->user_ptr[1];
9671         struct wireless_dev *wdev = dev->ieee80211_ptr;
9672
9673         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
9674                 return -EINVAL;
9675
9676         if (!rdev->ops->set_cqm_txe_config)
9677                 return -EOPNOTSUPP;
9678
9679         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9680             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9681                 return -EOPNOTSUPP;
9682
9683         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
9684 }
9685
9686 static int cfg80211_cqm_rssi_update(struct cfg80211_registered_device *rdev,
9687                                     struct net_device *dev)
9688 {
9689         struct wireless_dev *wdev = dev->ieee80211_ptr;
9690         s32 last, low, high;
9691         u32 hyst;
9692         int i, n;
9693         int err;
9694
9695         /* RSSI reporting disabled? */
9696         if (!wdev->cqm_config)
9697                 return rdev_set_cqm_rssi_range_config(rdev, dev, 0, 0);
9698
9699         /*
9700          * Obtain current RSSI value if possible, if not and no RSSI threshold
9701          * event has been received yet, we should receive an event after a
9702          * connection is established and enough beacons received to calculate
9703          * the average.
9704          */
9705         if (!wdev->cqm_config->last_rssi_event_value && wdev->current_bss &&
9706             rdev->ops->get_station) {
9707                 struct station_info sinfo;
9708                 u8 *mac_addr;
9709
9710                 mac_addr = wdev->current_bss->pub.bssid;
9711
9712                 err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
9713                 if (err)
9714                         return err;
9715
9716                 if (sinfo.filled & BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG))
9717                         wdev->cqm_config->last_rssi_event_value =
9718                                 (s8) sinfo.rx_beacon_signal_avg;
9719         }
9720
9721         last = wdev->cqm_config->last_rssi_event_value;
9722         hyst = wdev->cqm_config->rssi_hyst;
9723         n = wdev->cqm_config->n_rssi_thresholds;
9724
9725         for (i = 0; i < n; i++)
9726                 if (last < wdev->cqm_config->rssi_thresholds[i])
9727                         break;
9728
9729         low = i > 0 ?
9730                 (wdev->cqm_config->rssi_thresholds[i - 1] - hyst) : S32_MIN;
9731         high = i < n ?
9732                 (wdev->cqm_config->rssi_thresholds[i] + hyst - 1) : S32_MAX;
9733
9734         return rdev_set_cqm_rssi_range_config(rdev, dev, low, high);
9735 }
9736
9737 static int nl80211_set_cqm_rssi(struct genl_info *info,
9738                                 const s32 *thresholds, int n_thresholds,
9739                                 u32 hysteresis)
9740 {
9741         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9742         struct net_device *dev = info->user_ptr[1];
9743         struct wireless_dev *wdev = dev->ieee80211_ptr;
9744         int i, err;
9745         s32 prev = S32_MIN;
9746
9747         /* Check all values negative and sorted */
9748         for (i = 0; i < n_thresholds; i++) {
9749                 if (thresholds[i] > 0 || thresholds[i] <= prev)
9750                         return -EINVAL;
9751
9752                 prev = thresholds[i];
9753         }
9754
9755         if (wdev->iftype != NL80211_IFTYPE_STATION &&
9756             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
9757                 return -EOPNOTSUPP;
9758
9759         wdev_lock(wdev);
9760         cfg80211_cqm_config_free(wdev);
9761         wdev_unlock(wdev);
9762
9763         if (n_thresholds <= 1 && rdev->ops->set_cqm_rssi_config) {
9764                 if (n_thresholds == 0 || thresholds[0] == 0) /* Disabling */
9765                         return rdev_set_cqm_rssi_config(rdev, dev, 0, 0);
9766
9767                 return rdev_set_cqm_rssi_config(rdev, dev,
9768                                                 thresholds[0], hysteresis);
9769         }
9770
9771         if (!wiphy_ext_feature_isset(&rdev->wiphy,
9772                                      NL80211_EXT_FEATURE_CQM_RSSI_LIST))
9773                 return -EOPNOTSUPP;
9774
9775         if (n_thresholds == 1 && thresholds[0] == 0) /* Disabling */
9776                 n_thresholds = 0;
9777
9778         wdev_lock(wdev);
9779         if (n_thresholds) {
9780                 struct cfg80211_cqm_config *cqm_config;
9781
9782                 cqm_config = kzalloc(sizeof(struct cfg80211_cqm_config) +
9783                                      n_thresholds * sizeof(s32), GFP_KERNEL);
9784                 if (!cqm_config) {
9785                         err = -ENOMEM;
9786                         goto unlock;
9787                 }
9788
9789                 cqm_config->rssi_hyst = hysteresis;
9790                 cqm_config->n_rssi_thresholds = n_thresholds;
9791                 memcpy(cqm_config->rssi_thresholds, thresholds,
9792                        n_thresholds * sizeof(s32));
9793
9794                 wdev->cqm_config = cqm_config;
9795         }
9796
9797         err = cfg80211_cqm_rssi_update(rdev, dev);
9798
9799 unlock:
9800         wdev_unlock(wdev);
9801
9802         return err;
9803 }
9804
9805 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
9806 {
9807         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
9808         struct nlattr *cqm;
9809         int err;
9810
9811         cqm = info->attrs[NL80211_ATTR_CQM];
9812         if (!cqm)
9813                 return -EINVAL;
9814
9815         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
9816                                nl80211_attr_cqm_policy, info->extack);
9817         if (err)
9818                 return err;
9819
9820         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
9821             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
9822                 const s32 *thresholds =
9823                         nla_data(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9824                 int len = nla_len(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
9825                 u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
9826
9827                 if (len % 4)
9828                         return -EINVAL;
9829
9830                 return nl80211_set_cqm_rssi(info, thresholds, len / 4,
9831                                             hysteresis);
9832         }
9833
9834         if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
9835             attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
9836             attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
9837                 u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
9838                 u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
9839                 u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
9840
9841                 return nl80211_set_cqm_txe(info, rate, pkts, intvl);
9842         }
9843
9844         return -EINVAL;
9845 }
9846
9847 static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
9848 {
9849         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9850         struct net_device *dev = info->user_ptr[1];
9851         struct ocb_setup setup = {};
9852         int err;
9853
9854         err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9855         if (err)
9856                 return err;
9857
9858         return cfg80211_join_ocb(rdev, dev, &setup);
9859 }
9860
9861 static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
9862 {
9863         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9864         struct net_device *dev = info->user_ptr[1];
9865
9866         return cfg80211_leave_ocb(rdev, dev);
9867 }
9868
9869 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
9870 {
9871         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9872         struct net_device *dev = info->user_ptr[1];
9873         struct mesh_config cfg;
9874         struct mesh_setup setup;
9875         int err;
9876
9877         /* start with default */
9878         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
9879         memcpy(&setup, &default_mesh_setup, sizeof(setup));
9880
9881         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
9882                 /* and parse parameters if given */
9883                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
9884                 if (err)
9885                         return err;
9886         }
9887
9888         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
9889             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
9890                 return -EINVAL;
9891
9892         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
9893         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
9894
9895         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
9896             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
9897                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
9898                         return -EINVAL;
9899
9900         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
9901                 setup.beacon_interval =
9902                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
9903
9904                 err = cfg80211_validate_beacon_int(rdev,
9905                                                    NL80211_IFTYPE_MESH_POINT,
9906                                                    setup.beacon_interval);
9907                 if (err)
9908                         return err;
9909         }
9910
9911         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
9912                 setup.dtim_period =
9913                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
9914                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
9915                         return -EINVAL;
9916         }
9917
9918         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
9919                 /* parse additional setup parameters if given */
9920                 err = nl80211_parse_mesh_setup(info, &setup);
9921                 if (err)
9922                         return err;
9923         }
9924
9925         if (setup.user_mpm)
9926                 cfg.auto_open_plinks = false;
9927
9928         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
9929                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
9930                 if (err)
9931                         return err;
9932         } else {
9933                 /* cfg80211_join_mesh() will sort it out */
9934                 setup.chandef.chan = NULL;
9935         }
9936
9937         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
9938                 u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9939                 int n_rates =
9940                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
9941                 struct ieee80211_supported_band *sband;
9942
9943                 if (!setup.chandef.chan)
9944                         return -EINVAL;
9945
9946                 sband = rdev->wiphy.bands[setup.chandef.chan->band];
9947
9948                 err = ieee80211_get_ratemask(sband, rates, n_rates,
9949                                              &setup.basic_rates);
9950                 if (err)
9951                         return err;
9952         }
9953
9954         if (info->attrs[NL80211_ATTR_TX_RATES]) {
9955                 err = nl80211_parse_tx_bitrate_mask(info, &setup.beacon_rate);
9956                 if (err)
9957                         return err;
9958
9959                 err = validate_beacon_tx_rate(rdev, setup.chandef.chan->band,
9960                                               &setup.beacon_rate);
9961                 if (err)
9962                         return err;
9963         }
9964
9965         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
9966 }
9967
9968 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
9969 {
9970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
9971         struct net_device *dev = info->user_ptr[1];
9972
9973         return cfg80211_leave_mesh(rdev, dev);
9974 }
9975
9976 #ifdef CONFIG_PM
9977 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
9978                                         struct cfg80211_registered_device *rdev)
9979 {
9980         struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
9981         struct nlattr *nl_pats, *nl_pat;
9982         int i, pat_len;
9983
9984         if (!wowlan->n_patterns)
9985                 return 0;
9986
9987         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
9988         if (!nl_pats)
9989                 return -ENOBUFS;
9990
9991         for (i = 0; i < wowlan->n_patterns; i++) {
9992                 nl_pat = nla_nest_start(msg, i + 1);
9993                 if (!nl_pat)
9994                         return -ENOBUFS;
9995                 pat_len = wowlan->patterns[i].pattern_len;
9996                 if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
9997                             wowlan->patterns[i].mask) ||
9998                     nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
9999                             wowlan->patterns[i].pattern) ||
10000                     nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10001                                 wowlan->patterns[i].pkt_offset))
10002                         return -ENOBUFS;
10003                 nla_nest_end(msg, nl_pat);
10004         }
10005         nla_nest_end(msg, nl_pats);
10006
10007         return 0;
10008 }
10009
10010 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
10011                                    struct cfg80211_wowlan_tcp *tcp)
10012 {
10013         struct nlattr *nl_tcp;
10014
10015         if (!tcp)
10016                 return 0;
10017
10018         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
10019         if (!nl_tcp)
10020                 return -ENOBUFS;
10021
10022         if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
10023             nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
10024             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
10025             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
10026             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
10027             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
10028                     tcp->payload_len, tcp->payload) ||
10029             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
10030                         tcp->data_interval) ||
10031             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
10032                     tcp->wake_len, tcp->wake_data) ||
10033             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
10034                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
10035                 return -ENOBUFS;
10036
10037         if (tcp->payload_seq.len &&
10038             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
10039                     sizeof(tcp->payload_seq), &tcp->payload_seq))
10040                 return -ENOBUFS;
10041
10042         if (tcp->payload_tok.len &&
10043             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
10044                     sizeof(tcp->payload_tok) + tcp->tokens_size,
10045                     &tcp->payload_tok))
10046                 return -ENOBUFS;
10047
10048         nla_nest_end(msg, nl_tcp);
10049
10050         return 0;
10051 }
10052
10053 static int nl80211_send_wowlan_nd(struct sk_buff *msg,
10054                                   struct cfg80211_sched_scan_request *req)
10055 {
10056         struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
10057         int i;
10058
10059         if (!req)
10060                 return 0;
10061
10062         nd = nla_nest_start(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
10063         if (!nd)
10064                 return -ENOBUFS;
10065
10066         if (req->n_scan_plans == 1 &&
10067             nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
10068                         req->scan_plans[0].interval * 1000))
10069                 return -ENOBUFS;
10070
10071         if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
10072                 return -ENOBUFS;
10073
10074         if (req->relative_rssi_set) {
10075                 struct nl80211_bss_select_rssi_adjust rssi_adjust;
10076
10077                 if (nla_put_s8(msg, NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI,
10078                                req->relative_rssi))
10079                         return -ENOBUFS;
10080
10081                 rssi_adjust.band = req->rssi_adjust.band;
10082                 rssi_adjust.delta = req->rssi_adjust.delta;
10083                 if (nla_put(msg, NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST,
10084                             sizeof(rssi_adjust), &rssi_adjust))
10085                         return -ENOBUFS;
10086         }
10087
10088         freqs = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
10089         if (!freqs)
10090                 return -ENOBUFS;
10091
10092         for (i = 0; i < req->n_channels; i++) {
10093                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
10094                         return -ENOBUFS;
10095         }
10096
10097         nla_nest_end(msg, freqs);
10098
10099         if (req->n_match_sets) {
10100                 matches = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_MATCH);
10101                 if (!matches)
10102                         return -ENOBUFS;
10103
10104                 for (i = 0; i < req->n_match_sets; i++) {
10105                         match = nla_nest_start(msg, i);
10106                         if (!match)
10107                                 return -ENOBUFS;
10108
10109                         if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
10110                                     req->match_sets[i].ssid.ssid_len,
10111                                     req->match_sets[i].ssid.ssid))
10112                                 return -ENOBUFS;
10113                         nla_nest_end(msg, match);
10114                 }
10115                 nla_nest_end(msg, matches);
10116         }
10117
10118         scan_plans = nla_nest_start(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
10119         if (!scan_plans)
10120                 return -ENOBUFS;
10121
10122         for (i = 0; i < req->n_scan_plans; i++) {
10123                 scan_plan = nla_nest_start(msg, i + 1);
10124                 if (!scan_plan)
10125                         return -ENOBUFS;
10126
10127                 if (!scan_plan ||
10128                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
10129                                 req->scan_plans[i].interval) ||
10130                     (req->scan_plans[i].iterations &&
10131                      nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
10132                                  req->scan_plans[i].iterations)))
10133                         return -ENOBUFS;
10134                 nla_nest_end(msg, scan_plan);
10135         }
10136         nla_nest_end(msg, scan_plans);
10137
10138         nla_nest_end(msg, nd);
10139
10140         return 0;
10141 }
10142
10143 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
10144 {
10145         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10146         struct sk_buff *msg;
10147         void *hdr;
10148         u32 size = NLMSG_DEFAULT_SIZE;
10149
10150         if (!rdev->wiphy.wowlan)
10151                 return -EOPNOTSUPP;
10152
10153         if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
10154                 /* adjust size to have room for all the data */
10155                 size += rdev->wiphy.wowlan_config->tcp->tokens_size +
10156                         rdev->wiphy.wowlan_config->tcp->payload_len +
10157                         rdev->wiphy.wowlan_config->tcp->wake_len +
10158                         rdev->wiphy.wowlan_config->tcp->wake_len / 8;
10159         }
10160
10161         msg = nlmsg_new(size, GFP_KERNEL);
10162         if (!msg)
10163                 return -ENOMEM;
10164
10165         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10166                              NL80211_CMD_GET_WOWLAN);
10167         if (!hdr)
10168                 goto nla_put_failure;
10169
10170         if (rdev->wiphy.wowlan_config) {
10171                 struct nlattr *nl_wowlan;
10172
10173                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10174                 if (!nl_wowlan)
10175                         goto nla_put_failure;
10176
10177                 if ((rdev->wiphy.wowlan_config->any &&
10178                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
10179                     (rdev->wiphy.wowlan_config->disconnect &&
10180                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
10181                     (rdev->wiphy.wowlan_config->magic_pkt &&
10182                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
10183                     (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
10184                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
10185                     (rdev->wiphy.wowlan_config->eap_identity_req &&
10186                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
10187                     (rdev->wiphy.wowlan_config->four_way_handshake &&
10188                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
10189                     (rdev->wiphy.wowlan_config->rfkill_release &&
10190                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
10191                         goto nla_put_failure;
10192
10193                 if (nl80211_send_wowlan_patterns(msg, rdev))
10194                         goto nla_put_failure;
10195
10196                 if (nl80211_send_wowlan_tcp(msg,
10197                                             rdev->wiphy.wowlan_config->tcp))
10198                         goto nla_put_failure;
10199
10200                 if (nl80211_send_wowlan_nd(
10201                             msg,
10202                             rdev->wiphy.wowlan_config->nd_config))
10203                         goto nla_put_failure;
10204
10205                 nla_nest_end(msg, nl_wowlan);
10206         }
10207
10208         genlmsg_end(msg, hdr);
10209         return genlmsg_reply(msg, info);
10210
10211 nla_put_failure:
10212         nlmsg_free(msg);
10213         return -ENOBUFS;
10214 }
10215
10216 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
10217                                     struct nlattr *attr,
10218                                     struct cfg80211_wowlan *trig)
10219 {
10220         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
10221         struct cfg80211_wowlan_tcp *cfg;
10222         struct nl80211_wowlan_tcp_data_token *tok = NULL;
10223         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
10224         u32 size;
10225         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
10226         int err, port;
10227
10228         if (!rdev->wiphy.wowlan->tcp)
10229                 return -EINVAL;
10230
10231         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TCP, attr,
10232                                nl80211_wowlan_tcp_policy, NULL);
10233         if (err)
10234                 return err;
10235
10236         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
10237             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
10238             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
10239             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
10240             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
10241             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
10242             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
10243             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
10244                 return -EINVAL;
10245
10246         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
10247         if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
10248                 return -EINVAL;
10249
10250         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
10251                         rdev->wiphy.wowlan->tcp->data_interval_max ||
10252             nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
10253                 return -EINVAL;
10254
10255         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
10256         if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
10257                 return -EINVAL;
10258
10259         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
10260         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
10261                 return -EINVAL;
10262
10263         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
10264                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
10265
10266                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
10267                 tokens_size = tokln - sizeof(*tok);
10268
10269                 if (!tok->len || tokens_size % tok->len)
10270                         return -EINVAL;
10271                 if (!rdev->wiphy.wowlan->tcp->tok)
10272                         return -EINVAL;
10273                 if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
10274                         return -EINVAL;
10275                 if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
10276                         return -EINVAL;
10277                 if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
10278                         return -EINVAL;
10279                 if (tok->offset + tok->len > data_size)
10280                         return -EINVAL;
10281         }
10282
10283         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
10284                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
10285                 if (!rdev->wiphy.wowlan->tcp->seq)
10286                         return -EINVAL;
10287                 if (seq->len == 0 || seq->len > 4)
10288                         return -EINVAL;
10289                 if (seq->len + seq->offset > data_size)
10290                         return -EINVAL;
10291         }
10292
10293         size = sizeof(*cfg);
10294         size += data_size;
10295         size += wake_size + wake_mask_size;
10296         size += tokens_size;
10297
10298         cfg = kzalloc(size, GFP_KERNEL);
10299         if (!cfg)
10300                 return -ENOMEM;
10301         cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
10302         cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
10303         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
10304                ETH_ALEN);
10305         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
10306                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
10307         else
10308                 port = 0;
10309 #ifdef CONFIG_INET
10310         /* allocate a socket and port for it and use it */
10311         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
10312                             IPPROTO_TCP, &cfg->sock, 1);
10313         if (err) {
10314                 kfree(cfg);
10315                 return err;
10316         }
10317         if (inet_csk_get_port(cfg->sock->sk, port)) {
10318                 sock_release(cfg->sock);
10319                 kfree(cfg);
10320                 return -EADDRINUSE;
10321         }
10322         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
10323 #else
10324         if (!port) {
10325                 kfree(cfg);
10326                 return -EINVAL;
10327         }
10328         cfg->src_port = port;
10329 #endif
10330
10331         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
10332         cfg->payload_len = data_size;
10333         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
10334         memcpy((void *)cfg->payload,
10335                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
10336                data_size);
10337         if (seq)
10338                 cfg->payload_seq = *seq;
10339         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
10340         cfg->wake_len = wake_size;
10341         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
10342         memcpy((void *)cfg->wake_data,
10343                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
10344                wake_size);
10345         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
10346                          data_size + wake_size;
10347         memcpy((void *)cfg->wake_mask,
10348                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
10349                wake_mask_size);
10350         if (tok) {
10351                 cfg->tokens_size = tokens_size;
10352                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
10353         }
10354
10355         trig->tcp = cfg;
10356
10357         return 0;
10358 }
10359
10360 static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
10361                                    const struct wiphy_wowlan_support *wowlan,
10362                                    struct nlattr *attr,
10363                                    struct cfg80211_wowlan *trig)
10364 {
10365         struct nlattr **tb;
10366         int err;
10367
10368         tb = kzalloc(NUM_NL80211_ATTR * sizeof(*tb), GFP_KERNEL);
10369         if (!tb)
10370                 return -ENOMEM;
10371
10372         if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
10373                 err = -EOPNOTSUPP;
10374                 goto out;
10375         }
10376
10377         err = nla_parse_nested(tb, NL80211_ATTR_MAX, attr, nl80211_policy,
10378                                NULL);
10379         if (err)
10380                 goto out;
10381
10382         trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb,
10383                                                    wowlan->max_nd_match_sets);
10384         err = PTR_ERR_OR_ZERO(trig->nd_config);
10385         if (err)
10386                 trig->nd_config = NULL;
10387
10388 out:
10389         kfree(tb);
10390         return err;
10391 }
10392
10393 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
10394 {
10395         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10396         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
10397         struct cfg80211_wowlan new_triggers = {};
10398         struct cfg80211_wowlan *ntrig;
10399         const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
10400         int err, i;
10401         bool prev_enabled = rdev->wiphy.wowlan_config;
10402         bool regular = false;
10403
10404         if (!wowlan)
10405                 return -EOPNOTSUPP;
10406
10407         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
10408                 cfg80211_rdev_free_wowlan(rdev);
10409                 rdev->wiphy.wowlan_config = NULL;
10410                 goto set_wakeup;
10411         }
10412
10413         err = nla_parse_nested(tb, MAX_NL80211_WOWLAN_TRIG,
10414                                info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS],
10415                                nl80211_wowlan_policy, info->extack);
10416         if (err)
10417                 return err;
10418
10419         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
10420                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
10421                         return -EINVAL;
10422                 new_triggers.any = true;
10423         }
10424
10425         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
10426                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
10427                         return -EINVAL;
10428                 new_triggers.disconnect = true;
10429                 regular = true;
10430         }
10431
10432         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
10433                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
10434                         return -EINVAL;
10435                 new_triggers.magic_pkt = true;
10436                 regular = true;
10437         }
10438
10439         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
10440                 return -EINVAL;
10441
10442         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
10443                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
10444                         return -EINVAL;
10445                 new_triggers.gtk_rekey_failure = true;
10446                 regular = true;
10447         }
10448
10449         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
10450                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
10451                         return -EINVAL;
10452                 new_triggers.eap_identity_req = true;
10453                 regular = true;
10454         }
10455
10456         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
10457                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
10458                         return -EINVAL;
10459                 new_triggers.four_way_handshake = true;
10460                 regular = true;
10461         }
10462
10463         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
10464                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
10465                         return -EINVAL;
10466                 new_triggers.rfkill_release = true;
10467                 regular = true;
10468         }
10469
10470         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
10471                 struct nlattr *pat;
10472                 int n_patterns = 0;
10473                 int rem, pat_len, mask_len, pkt_offset;
10474                 struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10475
10476                 regular = true;
10477
10478                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10479                                     rem)
10480                         n_patterns++;
10481                 if (n_patterns > wowlan->n_patterns)
10482                         return -EINVAL;
10483
10484                 new_triggers.patterns = kcalloc(n_patterns,
10485                                                 sizeof(new_triggers.patterns[0]),
10486                                                 GFP_KERNEL);
10487                 if (!new_triggers.patterns)
10488                         return -ENOMEM;
10489
10490                 new_triggers.n_patterns = n_patterns;
10491                 i = 0;
10492
10493                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
10494                                     rem) {
10495                         u8 *mask_pat;
10496
10497                         nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat,
10498                                          NULL, info->extack);
10499                         err = -EINVAL;
10500                         if (!pat_tb[NL80211_PKTPAT_MASK] ||
10501                             !pat_tb[NL80211_PKTPAT_PATTERN])
10502                                 goto error;
10503                         pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10504                         mask_len = DIV_ROUND_UP(pat_len, 8);
10505                         if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10506                                 goto error;
10507                         if (pat_len > wowlan->pattern_max_len ||
10508                             pat_len < wowlan->pattern_min_len)
10509                                 goto error;
10510
10511                         if (!pat_tb[NL80211_PKTPAT_OFFSET])
10512                                 pkt_offset = 0;
10513                         else
10514                                 pkt_offset = nla_get_u32(
10515                                         pat_tb[NL80211_PKTPAT_OFFSET]);
10516                         if (pkt_offset > wowlan->max_pkt_offset)
10517                                 goto error;
10518                         new_triggers.patterns[i].pkt_offset = pkt_offset;
10519
10520                         mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10521                         if (!mask_pat) {
10522                                 err = -ENOMEM;
10523                                 goto error;
10524                         }
10525                         new_triggers.patterns[i].mask = mask_pat;
10526                         memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10527                                mask_len);
10528                         mask_pat += mask_len;
10529                         new_triggers.patterns[i].pattern = mask_pat;
10530                         new_triggers.patterns[i].pattern_len = pat_len;
10531                         memcpy(mask_pat,
10532                                nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10533                                pat_len);
10534                         i++;
10535                 }
10536         }
10537
10538         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
10539                 regular = true;
10540                 err = nl80211_parse_wowlan_tcp(
10541                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
10542                         &new_triggers);
10543                 if (err)
10544                         goto error;
10545         }
10546
10547         if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
10548                 regular = true;
10549                 err = nl80211_parse_wowlan_nd(
10550                         rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
10551                         &new_triggers);
10552                 if (err)
10553                         goto error;
10554         }
10555
10556         /* The 'any' trigger means the device continues operating more or less
10557          * as in its normal operation mode and wakes up the host on most of the
10558          * normal interrupts (like packet RX, ...)
10559          * It therefore makes little sense to combine with the more constrained
10560          * wakeup trigger modes.
10561          */
10562         if (new_triggers.any && regular) {
10563                 err = -EINVAL;
10564                 goto error;
10565         }
10566
10567         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
10568         if (!ntrig) {
10569                 err = -ENOMEM;
10570                 goto error;
10571         }
10572         cfg80211_rdev_free_wowlan(rdev);
10573         rdev->wiphy.wowlan_config = ntrig;
10574
10575  set_wakeup:
10576         if (rdev->ops->set_wakeup &&
10577             prev_enabled != !!rdev->wiphy.wowlan_config)
10578                 rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);
10579
10580         return 0;
10581  error:
10582         for (i = 0; i < new_triggers.n_patterns; i++)
10583                 kfree(new_triggers.patterns[i].mask);
10584         kfree(new_triggers.patterns);
10585         if (new_triggers.tcp && new_triggers.tcp->sock)
10586                 sock_release(new_triggers.tcp->sock);
10587         kfree(new_triggers.tcp);
10588         kfree(new_triggers.nd_config);
10589         return err;
10590 }
10591 #endif
10592
10593 static int nl80211_send_coalesce_rules(struct sk_buff *msg,
10594                                        struct cfg80211_registered_device *rdev)
10595 {
10596         struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
10597         int i, j, pat_len;
10598         struct cfg80211_coalesce_rules *rule;
10599
10600         if (!rdev->coalesce->n_rules)
10601                 return 0;
10602
10603         nl_rules = nla_nest_start(msg, NL80211_ATTR_COALESCE_RULE);
10604         if (!nl_rules)
10605                 return -ENOBUFS;
10606
10607         for (i = 0; i < rdev->coalesce->n_rules; i++) {
10608                 nl_rule = nla_nest_start(msg, i + 1);
10609                 if (!nl_rule)
10610                         return -ENOBUFS;
10611
10612                 rule = &rdev->coalesce->rules[i];
10613                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
10614                                 rule->delay))
10615                         return -ENOBUFS;
10616
10617                 if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
10618                                 rule->condition))
10619                         return -ENOBUFS;
10620
10621                 nl_pats = nla_nest_start(msg,
10622                                 NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
10623                 if (!nl_pats)
10624                         return -ENOBUFS;
10625
10626                 for (j = 0; j < rule->n_patterns; j++) {
10627                         nl_pat = nla_nest_start(msg, j + 1);
10628                         if (!nl_pat)
10629                                 return -ENOBUFS;
10630                         pat_len = rule->patterns[j].pattern_len;
10631                         if (nla_put(msg, NL80211_PKTPAT_MASK,
10632                                     DIV_ROUND_UP(pat_len, 8),
10633                                     rule->patterns[j].mask) ||
10634                             nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
10635                                     rule->patterns[j].pattern) ||
10636                             nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
10637                                         rule->patterns[j].pkt_offset))
10638                                 return -ENOBUFS;
10639                         nla_nest_end(msg, nl_pat);
10640                 }
10641                 nla_nest_end(msg, nl_pats);
10642                 nla_nest_end(msg, nl_rule);
10643         }
10644         nla_nest_end(msg, nl_rules);
10645
10646         return 0;
10647 }
10648
10649 static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
10650 {
10651         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10652         struct sk_buff *msg;
10653         void *hdr;
10654
10655         if (!rdev->wiphy.coalesce)
10656                 return -EOPNOTSUPP;
10657
10658         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10659         if (!msg)
10660                 return -ENOMEM;
10661
10662         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10663                              NL80211_CMD_GET_COALESCE);
10664         if (!hdr)
10665                 goto nla_put_failure;
10666
10667         if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
10668                 goto nla_put_failure;
10669
10670         genlmsg_end(msg, hdr);
10671         return genlmsg_reply(msg, info);
10672
10673 nla_put_failure:
10674         nlmsg_free(msg);
10675         return -ENOBUFS;
10676 }
10677
10678 void cfg80211_rdev_free_coalesce(struct cfg80211_registered_device *rdev)
10679 {
10680         struct cfg80211_coalesce *coalesce = rdev->coalesce;
10681         int i, j;
10682         struct cfg80211_coalesce_rules *rule;
10683
10684         if (!coalesce)
10685                 return;
10686
10687         for (i = 0; i < coalesce->n_rules; i++) {
10688                 rule = &coalesce->rules[i];
10689                 for (j = 0; j < rule->n_patterns; j++)
10690                         kfree(rule->patterns[j].mask);
10691                 kfree(rule->patterns);
10692         }
10693         kfree(coalesce->rules);
10694         kfree(coalesce);
10695         rdev->coalesce = NULL;
10696 }
10697
10698 static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
10699                                        struct nlattr *rule,
10700                                        struct cfg80211_coalesce_rules *new_rule)
10701 {
10702         int err, i;
10703         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10704         struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
10705         int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
10706         struct nlattr *pat_tb[NUM_NL80211_PKTPAT];
10707
10708         err = nla_parse_nested(tb, NL80211_ATTR_COALESCE_RULE_MAX, rule,
10709                                nl80211_coalesce_policy, NULL);
10710         if (err)
10711                 return err;
10712
10713         if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
10714                 new_rule->delay =
10715                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
10716         if (new_rule->delay > coalesce->max_delay)
10717                 return -EINVAL;
10718
10719         if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
10720                 new_rule->condition =
10721                         nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);
10722         if (new_rule->condition != NL80211_COALESCE_CONDITION_MATCH &&
10723             new_rule->condition != NL80211_COALESCE_CONDITION_NO_MATCH)
10724                 return -EINVAL;
10725
10726         if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
10727                 return -EINVAL;
10728
10729         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10730                             rem)
10731                 n_patterns++;
10732         if (n_patterns > coalesce->n_patterns)
10733                 return -EINVAL;
10734
10735         new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
10736                                      GFP_KERNEL);
10737         if (!new_rule->patterns)
10738                 return -ENOMEM;
10739
10740         new_rule->n_patterns = n_patterns;
10741         i = 0;
10742
10743         nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
10744                             rem) {
10745                 u8 *mask_pat;
10746
10747                 nla_parse_nested(pat_tb, MAX_NL80211_PKTPAT, pat, NULL, NULL);
10748                 if (!pat_tb[NL80211_PKTPAT_MASK] ||
10749                     !pat_tb[NL80211_PKTPAT_PATTERN])
10750                         return -EINVAL;
10751                 pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
10752                 mask_len = DIV_ROUND_UP(pat_len, 8);
10753                 if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
10754                         return -EINVAL;
10755                 if (pat_len > coalesce->pattern_max_len ||
10756                     pat_len < coalesce->pattern_min_len)
10757                         return -EINVAL;
10758
10759                 if (!pat_tb[NL80211_PKTPAT_OFFSET])
10760                         pkt_offset = 0;
10761                 else
10762                         pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
10763                 if (pkt_offset > coalesce->max_pkt_offset)
10764                         return -EINVAL;
10765                 new_rule->patterns[i].pkt_offset = pkt_offset;
10766
10767                 mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
10768                 if (!mask_pat)
10769                         return -ENOMEM;
10770
10771                 new_rule->patterns[i].mask = mask_pat;
10772                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
10773                        mask_len);
10774
10775                 mask_pat += mask_len;
10776                 new_rule->patterns[i].pattern = mask_pat;
10777                 new_rule->patterns[i].pattern_len = pat_len;
10778                 memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
10779                        pat_len);
10780                 i++;
10781         }
10782
10783         return 0;
10784 }
10785
10786 static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
10787 {
10788         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10789         const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
10790         struct cfg80211_coalesce new_coalesce = {};
10791         struct cfg80211_coalesce *n_coalesce;
10792         int err, rem_rule, n_rules = 0, i, j;
10793         struct nlattr *rule;
10794         struct cfg80211_coalesce_rules *tmp_rule;
10795
10796         if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
10797                 return -EOPNOTSUPP;
10798
10799         if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
10800                 cfg80211_rdev_free_coalesce(rdev);
10801                 rdev_set_coalesce(rdev, NULL);
10802                 return 0;
10803         }
10804
10805         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10806                             rem_rule)
10807                 n_rules++;
10808         if (n_rules > coalesce->n_rules)
10809                 return -EINVAL;
10810
10811         new_coalesce.rules = kcalloc(n_rules, sizeof(new_coalesce.rules[0]),
10812                                      GFP_KERNEL);
10813         if (!new_coalesce.rules)
10814                 return -ENOMEM;
10815
10816         new_coalesce.n_rules = n_rules;
10817         i = 0;
10818
10819         nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
10820                             rem_rule) {
10821                 err = nl80211_parse_coalesce_rule(rdev, rule,
10822                                                   &new_coalesce.rules[i]);
10823                 if (err)
10824                         goto error;
10825
10826                 i++;
10827         }
10828
10829         err = rdev_set_coalesce(rdev, &new_coalesce);
10830         if (err)
10831                 goto error;
10832
10833         n_coalesce = kmemdup(&new_coalesce, sizeof(new_coalesce), GFP_KERNEL);
10834         if (!n_coalesce) {
10835                 err = -ENOMEM;
10836                 goto error;
10837         }
10838         cfg80211_rdev_free_coalesce(rdev);
10839         rdev->coalesce = n_coalesce;
10840
10841         return 0;
10842 error:
10843         for (i = 0; i < new_coalesce.n_rules; i++) {
10844                 tmp_rule = &new_coalesce.rules[i];
10845                 for (j = 0; j < tmp_rule->n_patterns; j++)
10846                         kfree(tmp_rule->patterns[j].mask);
10847                 kfree(tmp_rule->patterns);
10848         }
10849         kfree(new_coalesce.rules);
10850
10851         return err;
10852 }
10853
10854 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
10855 {
10856         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10857         struct net_device *dev = info->user_ptr[1];
10858         struct wireless_dev *wdev = dev->ieee80211_ptr;
10859         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
10860         struct cfg80211_gtk_rekey_data rekey_data;
10861         int err;
10862
10863         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
10864                 return -EINVAL;
10865
10866         err = nla_parse_nested(tb, MAX_NL80211_REKEY_DATA,
10867                                info->attrs[NL80211_ATTR_REKEY_DATA],
10868                                nl80211_rekey_policy, info->extack);
10869         if (err)
10870                 return err;
10871
10872         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
10873                 return -ERANGE;
10874         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
10875                 return -ERANGE;
10876         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
10877                 return -ERANGE;
10878
10879         rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
10880         rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
10881         rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
10882
10883         wdev_lock(wdev);
10884         if (!wdev->current_bss) {
10885                 err = -ENOTCONN;
10886                 goto out;
10887         }
10888
10889         if (!rdev->ops->set_rekey_data) {
10890                 err = -EOPNOTSUPP;
10891                 goto out;
10892         }
10893
10894         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
10895  out:
10896         wdev_unlock(wdev);
10897         return err;
10898 }
10899
10900 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
10901                                              struct genl_info *info)
10902 {
10903         struct net_device *dev = info->user_ptr[1];
10904         struct wireless_dev *wdev = dev->ieee80211_ptr;
10905
10906         if (wdev->iftype != NL80211_IFTYPE_AP &&
10907             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10908                 return -EINVAL;
10909
10910         if (wdev->ap_unexpected_nlportid)
10911                 return -EBUSY;
10912
10913         wdev->ap_unexpected_nlportid = info->snd_portid;
10914         return 0;
10915 }
10916
10917 static int nl80211_probe_client(struct sk_buff *skb,
10918                                 struct genl_info *info)
10919 {
10920         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10921         struct net_device *dev = info->user_ptr[1];
10922         struct wireless_dev *wdev = dev->ieee80211_ptr;
10923         struct sk_buff *msg;
10924         void *hdr;
10925         const u8 *addr;
10926         u64 cookie;
10927         int err;
10928
10929         if (wdev->iftype != NL80211_IFTYPE_AP &&
10930             wdev->iftype != NL80211_IFTYPE_P2P_GO)
10931                 return -EOPNOTSUPP;
10932
10933         if (!info->attrs[NL80211_ATTR_MAC])
10934                 return -EINVAL;
10935
10936         if (!rdev->ops->probe_client)
10937                 return -EOPNOTSUPP;
10938
10939         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
10940         if (!msg)
10941                 return -ENOMEM;
10942
10943         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
10944                              NL80211_CMD_PROBE_CLIENT);
10945         if (!hdr) {
10946                 err = -ENOBUFS;
10947                 goto free_msg;
10948         }
10949
10950         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
10951
10952         err = rdev_probe_client(rdev, dev, addr, &cookie);
10953         if (err)
10954                 goto free_msg;
10955
10956         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
10957                               NL80211_ATTR_PAD))
10958                 goto nla_put_failure;
10959
10960         genlmsg_end(msg, hdr);
10961
10962         return genlmsg_reply(msg, info);
10963
10964  nla_put_failure:
10965         err = -ENOBUFS;
10966  free_msg:
10967         nlmsg_free(msg);
10968         return err;
10969 }
10970
10971 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
10972 {
10973         struct cfg80211_registered_device *rdev = info->user_ptr[0];
10974         struct cfg80211_beacon_registration *reg, *nreg;
10975         int rv;
10976
10977         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
10978                 return -EOPNOTSUPP;
10979
10980         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
10981         if (!nreg)
10982                 return -ENOMEM;
10983
10984         /* First, check if already registered. */
10985         spin_lock_bh(&rdev->beacon_registrations_lock);
10986         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10987                 if (reg->nlportid == info->snd_portid) {
10988                         rv = -EALREADY;
10989                         goto out_err;
10990                 }
10991         }
10992         /* Add it to the list */
10993         nreg->nlportid = info->snd_portid;
10994         list_add(&nreg->list, &rdev->beacon_registrations);
10995
10996         spin_unlock_bh(&rdev->beacon_registrations_lock);
10997
10998         return 0;
10999 out_err:
11000         spin_unlock_bh(&rdev->beacon_registrations_lock);
11001         kfree(nreg);
11002         return rv;
11003 }
11004
11005 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
11006 {
11007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11008         struct wireless_dev *wdev = info->user_ptr[1];
11009         int err;
11010
11011         if (!rdev->ops->start_p2p_device)
11012                 return -EOPNOTSUPP;
11013
11014         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
11015                 return -EOPNOTSUPP;
11016
11017         if (wdev_running(wdev))
11018                 return 0;
11019
11020         if (rfkill_blocked(rdev->rfkill))
11021                 return -ERFKILL;
11022
11023         err = rdev_start_p2p_device(rdev, wdev);
11024         if (err)
11025                 return err;
11026
11027         wdev->is_running = true;
11028         rdev->opencount++;
11029
11030         return 0;
11031 }
11032
11033 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
11034 {
11035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11036         struct wireless_dev *wdev = info->user_ptr[1];
11037
11038         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
11039                 return -EOPNOTSUPP;
11040
11041         if (!rdev->ops->stop_p2p_device)
11042                 return -EOPNOTSUPP;
11043
11044         cfg80211_stop_p2p_device(rdev, wdev);
11045
11046         return 0;
11047 }
11048
11049 static int nl80211_start_nan(struct sk_buff *skb, struct genl_info *info)
11050 {
11051         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11052         struct wireless_dev *wdev = info->user_ptr[1];
11053         struct cfg80211_nan_conf conf = {};
11054         int err;
11055
11056         if (wdev->iftype != NL80211_IFTYPE_NAN)
11057                 return -EOPNOTSUPP;
11058
11059         if (wdev_running(wdev))
11060                 return -EEXIST;
11061
11062         if (rfkill_blocked(rdev->rfkill))
11063                 return -ERFKILL;
11064
11065         if (!info->attrs[NL80211_ATTR_NAN_MASTER_PREF])
11066                 return -EINVAL;
11067
11068         conf.master_pref =
11069                 nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
11070         if (!conf.master_pref)
11071                 return -EINVAL;
11072
11073         if (info->attrs[NL80211_ATTR_BANDS]) {
11074                 u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);
11075
11076                 if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
11077                         return -EOPNOTSUPP;
11078
11079                 if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
11080                         return -EINVAL;
11081
11082                 conf.bands = bands;
11083         }
11084
11085         err = rdev_start_nan(rdev, wdev, &conf);
11086         if (err)
11087                 return err;
11088
11089         wdev->is_running = true;
11090         rdev->opencount++;
11091
11092         return 0;
11093 }
11094
11095 static int nl80211_stop_nan(struct sk_buff *skb, struct genl_info *info)
11096 {
11097         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11098         struct wireless_dev *wdev = info->user_ptr[1];
11099
11100         if (wdev->iftype != NL80211_IFTYPE_NAN)
11101                 return -EOPNOTSUPP;
11102
11103         cfg80211_stop_nan(rdev, wdev);
11104
11105         return 0;
11106 }
11107
11108 static int validate_nan_filter(struct nlattr *filter_attr)
11109 {
11110         struct nlattr *attr;
11111         int len = 0, n_entries = 0, rem;
11112
11113         nla_for_each_nested(attr, filter_attr, rem) {
11114                 len += nla_len(attr);
11115                 n_entries++;
11116         }
11117
11118         if (len >= U8_MAX)
11119                 return -EINVAL;
11120
11121         return n_entries;
11122 }
11123
11124 static int handle_nan_filter(struct nlattr *attr_filter,
11125                              struct cfg80211_nan_func *func,
11126                              bool tx)
11127 {
11128         struct nlattr *attr;
11129         int n_entries, rem, i;
11130         struct cfg80211_nan_func_filter *filter;
11131
11132         n_entries = validate_nan_filter(attr_filter);
11133         if (n_entries < 0)
11134                 return n_entries;
11135
11136         BUILD_BUG_ON(sizeof(*func->rx_filters) != sizeof(*func->tx_filters));
11137
11138         filter = kcalloc(n_entries, sizeof(*func->rx_filters), GFP_KERNEL);
11139         if (!filter)
11140                 return -ENOMEM;
11141
11142         i = 0;
11143         nla_for_each_nested(attr, attr_filter, rem) {
11144                 filter[i].filter = nla_memdup(attr, GFP_KERNEL);
11145                 filter[i].len = nla_len(attr);
11146                 i++;
11147         }
11148         if (tx) {
11149                 func->num_tx_filters = n_entries;
11150                 func->tx_filters = filter;
11151         } else {
11152                 func->num_rx_filters = n_entries;
11153                 func->rx_filters = filter;
11154         }
11155
11156         return 0;
11157 }
11158
11159 static int nl80211_nan_add_func(struct sk_buff *skb,
11160                                 struct genl_info *info)
11161 {
11162         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11163         struct wireless_dev *wdev = info->user_ptr[1];
11164         struct nlattr *tb[NUM_NL80211_NAN_FUNC_ATTR], *func_attr;
11165         struct cfg80211_nan_func *func;
11166         struct sk_buff *msg = NULL;
11167         void *hdr = NULL;
11168         int err = 0;
11169
11170         if (wdev->iftype != NL80211_IFTYPE_NAN)
11171                 return -EOPNOTSUPP;
11172
11173         if (!wdev_running(wdev))
11174                 return -ENOTCONN;
11175
11176         if (!info->attrs[NL80211_ATTR_NAN_FUNC])
11177                 return -EINVAL;
11178
11179         if (wdev->owner_nlportid &&
11180             wdev->owner_nlportid != info->snd_portid)
11181                 return -ENOTCONN;
11182
11183         err = nla_parse_nested(tb, NL80211_NAN_FUNC_ATTR_MAX,
11184                                info->attrs[NL80211_ATTR_NAN_FUNC],
11185                                nl80211_nan_func_policy, info->extack);
11186         if (err)
11187                 return err;
11188
11189         func = kzalloc(sizeof(*func), GFP_KERNEL);
11190         if (!func)
11191                 return -ENOMEM;
11192
11193         func->cookie = wdev->wiphy->cookie_counter++;
11194
11195         if (!tb[NL80211_NAN_FUNC_TYPE] ||
11196             nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]) > NL80211_NAN_FUNC_MAX_TYPE) {
11197                 err = -EINVAL;
11198                 goto out;
11199         }
11200
11201
11202         func->type = nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]);
11203
11204         if (!tb[NL80211_NAN_FUNC_SERVICE_ID]) {
11205                 err = -EINVAL;
11206                 goto out;
11207         }
11208
11209         memcpy(func->service_id, nla_data(tb[NL80211_NAN_FUNC_SERVICE_ID]),
11210                sizeof(func->service_id));
11211
11212         func->close_range =
11213                 nla_get_flag(tb[NL80211_NAN_FUNC_CLOSE_RANGE]);
11214
11215         if (tb[NL80211_NAN_FUNC_SERVICE_INFO]) {
11216                 func->serv_spec_info_len =
11217                         nla_len(tb[NL80211_NAN_FUNC_SERVICE_INFO]);
11218                 func->serv_spec_info =
11219                         kmemdup(nla_data(tb[NL80211_NAN_FUNC_SERVICE_INFO]),
11220                                 func->serv_spec_info_len,
11221                                 GFP_KERNEL);
11222                 if (!func->serv_spec_info) {
11223                         err = -ENOMEM;
11224                         goto out;
11225                 }
11226         }
11227
11228         if (tb[NL80211_NAN_FUNC_TTL])
11229                 func->ttl = nla_get_u32(tb[NL80211_NAN_FUNC_TTL]);
11230
11231         switch (func->type) {
11232         case NL80211_NAN_FUNC_PUBLISH:
11233                 if (!tb[NL80211_NAN_FUNC_PUBLISH_TYPE]) {
11234                         err = -EINVAL;
11235                         goto out;
11236                 }
11237
11238                 func->publish_type =
11239                         nla_get_u8(tb[NL80211_NAN_FUNC_PUBLISH_TYPE]);
11240                 func->publish_bcast =
11241                         nla_get_flag(tb[NL80211_NAN_FUNC_PUBLISH_BCAST]);
11242
11243                 if ((!(func->publish_type & NL80211_NAN_SOLICITED_PUBLISH)) &&
11244                         func->publish_bcast) {
11245                         err = -EINVAL;
11246                         goto out;
11247                 }
11248                 break;
11249         case NL80211_NAN_FUNC_SUBSCRIBE:
11250                 func->subscribe_active =
11251                         nla_get_flag(tb[NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE]);
11252                 break;
11253         case NL80211_NAN_FUNC_FOLLOW_UP:
11254                 if (!tb[NL80211_NAN_FUNC_FOLLOW_UP_ID] ||
11255                     !tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]) {
11256                         err = -EINVAL;
11257                         goto out;
11258                 }
11259
11260                 func->followup_id =
11261                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_ID]);
11262                 func->followup_reqid =
11263                         nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]);
11264                 memcpy(func->followup_dest.addr,
11265                        nla_data(tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]),
11266                        sizeof(func->followup_dest.addr));
11267                 if (func->ttl) {
11268                         err = -EINVAL;
11269                         goto out;
11270                 }
11271                 break;
11272         default:
11273                 err = -EINVAL;
11274                 goto out;
11275         }
11276
11277         if (tb[NL80211_NAN_FUNC_SRF]) {
11278                 struct nlattr *srf_tb[NUM_NL80211_NAN_SRF_ATTR];
11279
11280                 err = nla_parse_nested(srf_tb, NL80211_NAN_SRF_ATTR_MAX,
11281                                        tb[NL80211_NAN_FUNC_SRF],
11282                                        nl80211_nan_srf_policy, info->extack);
11283                 if (err)
11284                         goto out;
11285
11286                 func->srf_include =
11287                         nla_get_flag(srf_tb[NL80211_NAN_SRF_INCLUDE]);
11288
11289                 if (srf_tb[NL80211_NAN_SRF_BF]) {
11290                         if (srf_tb[NL80211_NAN_SRF_MAC_ADDRS] ||
11291                             !srf_tb[NL80211_NAN_SRF_BF_IDX]) {
11292                                 err = -EINVAL;
11293                                 goto out;
11294                         }
11295
11296                         func->srf_bf_len =
11297                                 nla_len(srf_tb[NL80211_NAN_SRF_BF]);
11298                         func->srf_bf =
11299                                 kmemdup(nla_data(srf_tb[NL80211_NAN_SRF_BF]),
11300                                         func->srf_bf_len, GFP_KERNEL);
11301                         if (!func->srf_bf) {
11302                                 err = -ENOMEM;
11303                                 goto out;
11304                         }
11305
11306                         func->srf_bf_idx =
11307                                 nla_get_u8(srf_tb[NL80211_NAN_SRF_BF_IDX]);
11308                 } else {
11309                         struct nlattr *attr, *mac_attr =
11310                                 srf_tb[NL80211_NAN_SRF_MAC_ADDRS];
11311                         int n_entries, rem, i = 0;
11312
11313                         if (!mac_attr) {
11314                                 err = -EINVAL;
11315                                 goto out;
11316                         }
11317
11318                         n_entries = validate_acl_mac_addrs(mac_attr);
11319                         if (n_entries <= 0) {
11320                                 err = -EINVAL;
11321                                 goto out;
11322                         }
11323
11324                         func->srf_num_macs = n_entries;
11325                         func->srf_macs =
11326                                 kzalloc(sizeof(*func->srf_macs) * n_entries,
11327                                         GFP_KERNEL);
11328                         if (!func->srf_macs) {
11329                                 err = -ENOMEM;
11330                                 goto out;
11331                         }
11332
11333                         nla_for_each_nested(attr, mac_attr, rem)
11334                                 memcpy(func->srf_macs[i++].addr, nla_data(attr),
11335                                        sizeof(*func->srf_macs));
11336                 }
11337         }
11338
11339         if (tb[NL80211_NAN_FUNC_TX_MATCH_FILTER]) {
11340                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_TX_MATCH_FILTER],
11341                                         func, true);
11342                 if (err)
11343                         goto out;
11344         }
11345
11346         if (tb[NL80211_NAN_FUNC_RX_MATCH_FILTER]) {
11347                 err = handle_nan_filter(tb[NL80211_NAN_FUNC_RX_MATCH_FILTER],
11348                                         func, false);
11349                 if (err)
11350                         goto out;
11351         }
11352
11353         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11354         if (!msg) {
11355                 err = -ENOMEM;
11356                 goto out;
11357         }
11358
11359         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11360                              NL80211_CMD_ADD_NAN_FUNCTION);
11361         /* This can't really happen - we just allocated 4KB */
11362         if (WARN_ON(!hdr)) {
11363                 err = -ENOMEM;
11364                 goto out;
11365         }
11366
11367         err = rdev_add_nan_func(rdev, wdev, func);
11368 out:
11369         if (err < 0) {
11370                 cfg80211_free_nan_func(func);
11371                 nlmsg_free(msg);
11372                 return err;
11373         }
11374
11375         /* propagate the instance id and cookie to userspace  */
11376         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, func->cookie,
11377                               NL80211_ATTR_PAD))
11378                 goto nla_put_failure;
11379
11380         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
11381         if (!func_attr)
11382                 goto nla_put_failure;
11383
11384         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID,
11385                        func->instance_id))
11386                 goto nla_put_failure;
11387
11388         nla_nest_end(msg, func_attr);
11389
11390         genlmsg_end(msg, hdr);
11391         return genlmsg_reply(msg, info);
11392
11393 nla_put_failure:
11394         nlmsg_free(msg);
11395         return -ENOBUFS;
11396 }
11397
11398 static int nl80211_nan_del_func(struct sk_buff *skb,
11399                                struct genl_info *info)
11400 {
11401         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11402         struct wireless_dev *wdev = info->user_ptr[1];
11403         u64 cookie;
11404
11405         if (wdev->iftype != NL80211_IFTYPE_NAN)
11406                 return -EOPNOTSUPP;
11407
11408         if (!wdev_running(wdev))
11409                 return -ENOTCONN;
11410
11411         if (!info->attrs[NL80211_ATTR_COOKIE])
11412                 return -EINVAL;
11413
11414         if (wdev->owner_nlportid &&
11415             wdev->owner_nlportid != info->snd_portid)
11416                 return -ENOTCONN;
11417
11418         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
11419
11420         rdev_del_nan_func(rdev, wdev, cookie);
11421
11422         return 0;
11423 }
11424
11425 static int nl80211_nan_change_config(struct sk_buff *skb,
11426                                      struct genl_info *info)
11427 {
11428         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11429         struct wireless_dev *wdev = info->user_ptr[1];
11430         struct cfg80211_nan_conf conf = {};
11431         u32 changed = 0;
11432
11433         if (wdev->iftype != NL80211_IFTYPE_NAN)
11434                 return -EOPNOTSUPP;
11435
11436         if (!wdev_running(wdev))
11437                 return -ENOTCONN;
11438
11439         if (info->attrs[NL80211_ATTR_NAN_MASTER_PREF]) {
11440                 conf.master_pref =
11441                         nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
11442                 if (conf.master_pref <= 1 || conf.master_pref == 255)
11443                         return -EINVAL;
11444
11445                 changed |= CFG80211_NAN_CONF_CHANGED_PREF;
11446         }
11447
11448         if (info->attrs[NL80211_ATTR_BANDS]) {
11449                 u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);
11450
11451                 if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
11452                         return -EOPNOTSUPP;
11453
11454                 if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
11455                         return -EINVAL;
11456
11457                 conf.bands = bands;
11458                 changed |= CFG80211_NAN_CONF_CHANGED_BANDS;
11459         }
11460
11461         if (!changed)
11462                 return -EINVAL;
11463
11464         return rdev_nan_change_conf(rdev, wdev, &conf, changed);
11465 }
11466
11467 void cfg80211_nan_match(struct wireless_dev *wdev,
11468                         struct cfg80211_nan_match_params *match, gfp_t gfp)
11469 {
11470         struct wiphy *wiphy = wdev->wiphy;
11471         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11472         struct nlattr *match_attr, *local_func_attr, *peer_func_attr;
11473         struct sk_buff *msg;
11474         void *hdr;
11475
11476         if (WARN_ON(!match->inst_id || !match->peer_inst_id || !match->addr))
11477                 return;
11478
11479         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11480         if (!msg)
11481                 return;
11482
11483         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NAN_MATCH);
11484         if (!hdr) {
11485                 nlmsg_free(msg);
11486                 return;
11487         }
11488
11489         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11490             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11491                                          wdev->netdev->ifindex)) ||
11492             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11493                               NL80211_ATTR_PAD))
11494                 goto nla_put_failure;
11495
11496         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, match->cookie,
11497                               NL80211_ATTR_PAD) ||
11498             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, match->addr))
11499                 goto nla_put_failure;
11500
11501         match_attr = nla_nest_start(msg, NL80211_ATTR_NAN_MATCH);
11502         if (!match_attr)
11503                 goto nla_put_failure;
11504
11505         local_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_LOCAL);
11506         if (!local_func_attr)
11507                 goto nla_put_failure;
11508
11509         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->inst_id))
11510                 goto nla_put_failure;
11511
11512         nla_nest_end(msg, local_func_attr);
11513
11514         peer_func_attr = nla_nest_start(msg, NL80211_NAN_MATCH_FUNC_PEER);
11515         if (!peer_func_attr)
11516                 goto nla_put_failure;
11517
11518         if (nla_put_u8(msg, NL80211_NAN_FUNC_TYPE, match->type) ||
11519             nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->peer_inst_id))
11520                 goto nla_put_failure;
11521
11522         if (match->info && match->info_len &&
11523             nla_put(msg, NL80211_NAN_FUNC_SERVICE_INFO, match->info_len,
11524                     match->info))
11525                 goto nla_put_failure;
11526
11527         nla_nest_end(msg, peer_func_attr);
11528         nla_nest_end(msg, match_attr);
11529         genlmsg_end(msg, hdr);
11530
11531         if (!wdev->owner_nlportid)
11532                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11533                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11534         else
11535                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11536                                 wdev->owner_nlportid);
11537
11538         return;
11539
11540 nla_put_failure:
11541         nlmsg_free(msg);
11542 }
11543 EXPORT_SYMBOL(cfg80211_nan_match);
11544
11545 void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
11546                                   u8 inst_id,
11547                                   enum nl80211_nan_func_term_reason reason,
11548                                   u64 cookie, gfp_t gfp)
11549 {
11550         struct wiphy *wiphy = wdev->wiphy;
11551         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11552         struct sk_buff *msg;
11553         struct nlattr *func_attr;
11554         void *hdr;
11555
11556         if (WARN_ON(!inst_id))
11557                 return;
11558
11559         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
11560         if (!msg)
11561                 return;
11562
11563         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_NAN_FUNCTION);
11564         if (!hdr) {
11565                 nlmsg_free(msg);
11566                 return;
11567         }
11568
11569         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11570             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
11571                                          wdev->netdev->ifindex)) ||
11572             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
11573                               NL80211_ATTR_PAD))
11574                 goto nla_put_failure;
11575
11576         if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
11577                               NL80211_ATTR_PAD))
11578                 goto nla_put_failure;
11579
11580         func_attr = nla_nest_start(msg, NL80211_ATTR_NAN_FUNC);
11581         if (!func_attr)
11582                 goto nla_put_failure;
11583
11584         if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, inst_id) ||
11585             nla_put_u8(msg, NL80211_NAN_FUNC_TERM_REASON, reason))
11586                 goto nla_put_failure;
11587
11588         nla_nest_end(msg, func_attr);
11589         genlmsg_end(msg, hdr);
11590
11591         if (!wdev->owner_nlportid)
11592                 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
11593                                         msg, 0, NL80211_MCGRP_NAN, gfp);
11594         else
11595                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
11596                                 wdev->owner_nlportid);
11597
11598         return;
11599
11600 nla_put_failure:
11601         nlmsg_free(msg);
11602 }
11603 EXPORT_SYMBOL(cfg80211_nan_func_terminated);
11604
11605 static int nl80211_get_protocol_features(struct sk_buff *skb,
11606                                          struct genl_info *info)
11607 {
11608         void *hdr;
11609         struct sk_buff *msg;
11610
11611         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
11612         if (!msg)
11613                 return -ENOMEM;
11614
11615         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
11616                              NL80211_CMD_GET_PROTOCOL_FEATURES);
11617         if (!hdr)
11618                 goto nla_put_failure;
11619
11620         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
11621                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
11622                 goto nla_put_failure;
11623
11624         genlmsg_end(msg, hdr);
11625         return genlmsg_reply(msg, info);
11626
11627  nla_put_failure:
11628         kfree_skb(msg);
11629         return -ENOBUFS;
11630 }
11631
11632 static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
11633 {
11634         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11635         struct cfg80211_update_ft_ies_params ft_params;
11636         struct net_device *dev = info->user_ptr[1];
11637
11638         if (!rdev->ops->update_ft_ies)
11639                 return -EOPNOTSUPP;
11640
11641         if (!info->attrs[NL80211_ATTR_MDID] ||
11642             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
11643                 return -EINVAL;
11644
11645         memset(&ft_params, 0, sizeof(ft_params));
11646         ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
11647         ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
11648         ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
11649
11650         return rdev_update_ft_ies(rdev, dev, &ft_params);
11651 }
11652
11653 static int nl80211_crit_protocol_start(struct sk_buff *skb,
11654                                        struct genl_info *info)
11655 {
11656         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11657         struct wireless_dev *wdev = info->user_ptr[1];
11658         enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
11659         u16 duration;
11660         int ret;
11661
11662         if (!rdev->ops->crit_proto_start)
11663                 return -EOPNOTSUPP;
11664
11665         if (WARN_ON(!rdev->ops->crit_proto_stop))
11666                 return -EINVAL;
11667
11668         if (rdev->crit_proto_nlportid)
11669                 return -EBUSY;
11670
11671         /* determine protocol if provided */
11672         if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
11673                 proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);
11674
11675         if (proto >= NUM_NL80211_CRIT_PROTO)
11676                 return -EINVAL;
11677
11678         /* timeout must be provided */
11679         if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
11680                 return -EINVAL;
11681
11682         duration =
11683                 nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);
11684
11685         if (duration > NL80211_CRIT_PROTO_MAX_DURATION)
11686                 return -ERANGE;
11687
11688         ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
11689         if (!ret)
11690                 rdev->crit_proto_nlportid = info->snd_portid;
11691
11692         return ret;
11693 }
11694
11695 static int nl80211_crit_protocol_stop(struct sk_buff *skb,
11696                                       struct genl_info *info)
11697 {
11698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11699         struct wireless_dev *wdev = info->user_ptr[1];
11700
11701         if (!rdev->ops->crit_proto_stop)
11702                 return -EOPNOTSUPP;
11703
11704         if (rdev->crit_proto_nlportid) {
11705                 rdev->crit_proto_nlportid = 0;
11706                 rdev_crit_proto_stop(rdev, wdev);
11707         }
11708         return 0;
11709 }
11710
11711 static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
11712 {
11713         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11714         struct wireless_dev *wdev =
11715                 __cfg80211_wdev_from_attrs(genl_info_net(info), info->attrs);
11716         int i, err;
11717         u32 vid, subcmd;
11718
11719         if (!rdev->wiphy.vendor_commands)
11720                 return -EOPNOTSUPP;
11721
11722         if (IS_ERR(wdev)) {
11723                 err = PTR_ERR(wdev);
11724                 if (err != -EINVAL)
11725                         return err;
11726                 wdev = NULL;
11727         } else if (wdev->wiphy != &rdev->wiphy) {
11728                 return -EINVAL;
11729         }
11730
11731         if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
11732             !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
11733                 return -EINVAL;
11734
11735         vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
11736         subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
11737         for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
11738                 const struct wiphy_vendor_command *vcmd;
11739                 void *data = NULL;
11740                 int len = 0;
11741
11742                 vcmd = &rdev->wiphy.vendor_commands[i];
11743
11744                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
11745                         continue;
11746
11747                 if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
11748                                    WIPHY_VENDOR_CMD_NEED_NETDEV)) {
11749                         if (!wdev)
11750                                 return -EINVAL;
11751                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
11752                             !wdev->netdev)
11753                                 return -EINVAL;
11754
11755                         if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
11756                                 if (!wdev_running(wdev))
11757                                         return -ENETDOWN;
11758                         }
11759
11760                         if (!vcmd->doit)
11761                                 return -EOPNOTSUPP;
11762                 } else {
11763                         wdev = NULL;
11764                 }
11765
11766                 if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
11767                         data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11768                         len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);
11769                 }
11770
11771                 rdev->cur_cmd_info = info;
11772                 err = rdev->wiphy.vendor_commands[i].doit(&rdev->wiphy, wdev,
11773                                                           data, len);
11774                 rdev->cur_cmd_info = NULL;
11775                 return err;
11776         }
11777
11778         return -EOPNOTSUPP;
11779 }
11780
11781 static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
11782                                        struct netlink_callback *cb,
11783                                        struct cfg80211_registered_device **rdev,
11784                                        struct wireless_dev **wdev)
11785 {
11786         struct nlattr **attrbuf = genl_family_attrbuf(&nl80211_fam);
11787         u32 vid, subcmd;
11788         unsigned int i;
11789         int vcmd_idx = -1;
11790         int err;
11791         void *data = NULL;
11792         unsigned int data_len = 0;
11793
11794         if (cb->args[0]) {
11795                 /* subtract the 1 again here */
11796                 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
11797                 struct wireless_dev *tmp;
11798
11799                 if (!wiphy)
11800                         return -ENODEV;
11801                 *rdev = wiphy_to_rdev(wiphy);
11802                 *wdev = NULL;
11803
11804                 if (cb->args[1]) {
11805                         list_for_each_entry(tmp, &wiphy->wdev_list, list) {
11806                                 if (tmp->identifier == cb->args[1] - 1) {
11807                                         *wdev = tmp;
11808                                         break;
11809                                 }
11810                         }
11811                 }
11812
11813                 /* keep rtnl locked in successful case */
11814                 return 0;
11815         }
11816
11817         err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, attrbuf,
11818                           nl80211_fam.maxattr, nl80211_policy, NULL);
11819         if (err)
11820                 return err;
11821
11822         if (!attrbuf[NL80211_ATTR_VENDOR_ID] ||
11823             !attrbuf[NL80211_ATTR_VENDOR_SUBCMD])
11824                 return -EINVAL;
11825
11826         *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk), attrbuf);
11827         if (IS_ERR(*wdev))
11828                 *wdev = NULL;
11829
11830         *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
11831         if (IS_ERR(*rdev))
11832                 return PTR_ERR(*rdev);
11833
11834         vid = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_ID]);
11835         subcmd = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);
11836
11837         for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
11838                 const struct wiphy_vendor_command *vcmd;
11839
11840                 vcmd = &(*rdev)->wiphy.vendor_commands[i];
11841
11842                 if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
11843                         continue;
11844
11845                 if (!vcmd->dumpit)
11846                         return -EOPNOTSUPP;
11847
11848                 vcmd_idx = i;
11849                 break;
11850         }
11851
11852         if (vcmd_idx < 0)
11853                 return -EOPNOTSUPP;
11854
11855         if (attrbuf[NL80211_ATTR_VENDOR_DATA]) {
11856                 data = nla_data(attrbuf[NL80211_ATTR_VENDOR_DATA]);
11857                 data_len = nla_len(attrbuf[NL80211_ATTR_VENDOR_DATA]);
11858         }
11859
11860         /* 0 is the first index - add 1 to parse only once */
11861         cb->args[0] = (*rdev)->wiphy_idx + 1;
11862         /* add 1 to know if it was NULL */
11863         cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
11864         cb->args[2] = vcmd_idx;
11865         cb->args[3] = (unsigned long)data;
11866         cb->args[4] = data_len;
11867
11868         /* keep rtnl locked in successful case */
11869         return 0;
11870 }
11871
11872 static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
11873                                    struct netlink_callback *cb)
11874 {
11875         struct cfg80211_registered_device *rdev;
11876         struct wireless_dev *wdev;
11877         unsigned int vcmd_idx;
11878         const struct wiphy_vendor_command *vcmd;
11879         void *data;
11880         int data_len;
11881         int err;
11882         struct nlattr *vendor_data;
11883
11884         rtnl_lock();
11885         err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
11886         if (err)
11887                 goto out;
11888
11889         vcmd_idx = cb->args[2];
11890         data = (void *)cb->args[3];
11891         data_len = cb->args[4];
11892         vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];
11893
11894         if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
11895                            WIPHY_VENDOR_CMD_NEED_NETDEV)) {
11896                 if (!wdev) {
11897                         err = -EINVAL;
11898                         goto out;
11899                 }
11900                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
11901                     !wdev->netdev) {
11902                         err = -EINVAL;
11903                         goto out;
11904                 }
11905
11906                 if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
11907                         if (!wdev_running(wdev)) {
11908                                 err = -ENETDOWN;
11909                                 goto out;
11910                         }
11911                 }
11912         }
11913
11914         while (1) {
11915                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
11916                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
11917                                            NL80211_CMD_VENDOR);
11918                 if (!hdr)
11919                         break;
11920
11921                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
11922                     (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
11923                                                wdev_id(wdev),
11924                                                NL80211_ATTR_PAD))) {
11925                         genlmsg_cancel(skb, hdr);
11926                         break;
11927                 }
11928
11929                 vendor_data = nla_nest_start(skb, NL80211_ATTR_VENDOR_DATA);
11930                 if (!vendor_data) {
11931                         genlmsg_cancel(skb, hdr);
11932                         break;
11933                 }
11934
11935                 err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
11936                                    (unsigned long *)&cb->args[5]);
11937                 nla_nest_end(skb, vendor_data);
11938
11939                 if (err == -ENOBUFS || err == -ENOENT) {
11940                         genlmsg_cancel(skb, hdr);
11941                         break;
11942                 } else if (err) {
11943                         genlmsg_cancel(skb, hdr);
11944                         goto out;
11945                 }
11946
11947                 genlmsg_end(skb, hdr);
11948         }
11949
11950         err = skb->len;
11951  out:
11952         rtnl_unlock();
11953         return err;
11954 }
11955
11956 struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
11957                                            enum nl80211_commands cmd,
11958                                            enum nl80211_attrs attr,
11959                                            int approxlen)
11960 {
11961         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
11962
11963         if (WARN_ON(!rdev->cur_cmd_info))
11964                 return NULL;
11965
11966         return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
11967                                            rdev->cur_cmd_info->snd_portid,
11968                                            rdev->cur_cmd_info->snd_seq,
11969                                            cmd, attr, NULL, GFP_KERNEL);
11970 }
11971 EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);
11972
11973 int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
11974 {
11975         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
11976         void *hdr = ((void **)skb->cb)[1];
11977         struct nlattr *data = ((void **)skb->cb)[2];
11978
11979         /* clear CB data for netlink core to own from now on */
11980         memset(skb->cb, 0, sizeof(skb->cb));
11981
11982         if (WARN_ON(!rdev->cur_cmd_info)) {
11983                 kfree_skb(skb);
11984                 return -EINVAL;
11985         }
11986
11987         nla_nest_end(skb, data);
11988         genlmsg_end(skb, hdr);
11989         return genlmsg_reply(skb, rdev->cur_cmd_info);
11990 }
11991 EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);
11992
11993 static int nl80211_set_qos_map(struct sk_buff *skb,
11994                                struct genl_info *info)
11995 {
11996         struct cfg80211_registered_device *rdev = info->user_ptr[0];
11997         struct cfg80211_qos_map *qos_map = NULL;
11998         struct net_device *dev = info->user_ptr[1];
11999         u8 *pos, len, num_des, des_len, des;
12000         int ret;
12001
12002         if (!rdev->ops->set_qos_map)
12003                 return -EOPNOTSUPP;
12004
12005         if (info->attrs[NL80211_ATTR_QOS_MAP]) {
12006                 pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
12007                 len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);
12008
12009                 if (len % 2 || len < IEEE80211_QOS_MAP_LEN_MIN ||
12010                     len > IEEE80211_QOS_MAP_LEN_MAX)
12011                         return -EINVAL;
12012
12013                 qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
12014                 if (!qos_map)
12015                         return -ENOMEM;
12016
12017                 num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
12018                 if (num_des) {
12019                         des_len = num_des *
12020                                 sizeof(struct cfg80211_dscp_exception);
12021                         memcpy(qos_map->dscp_exception, pos, des_len);
12022                         qos_map->num_des = num_des;
12023                         for (des = 0; des < num_des; des++) {
12024                                 if (qos_map->dscp_exception[des].up > 7) {
12025                                         kfree(qos_map);
12026                                         return -EINVAL;
12027                                 }
12028                         }
12029                         pos += des_len;
12030                 }
12031                 memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
12032         }
12033
12034         wdev_lock(dev->ieee80211_ptr);
12035         ret = nl80211_key_allowed(dev->ieee80211_ptr);
12036         if (!ret)
12037                 ret = rdev_set_qos_map(rdev, dev, qos_map);
12038         wdev_unlock(dev->ieee80211_ptr);
12039
12040         kfree(qos_map);
12041         return ret;
12042 }
12043
12044 static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
12045 {
12046         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12047         struct net_device *dev = info->user_ptr[1];
12048         struct wireless_dev *wdev = dev->ieee80211_ptr;
12049         const u8 *peer;
12050         u8 tsid, up;
12051         u16 admitted_time = 0;
12052         int err;
12053
12054         if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
12055                 return -EOPNOTSUPP;
12056
12057         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
12058             !info->attrs[NL80211_ATTR_USER_PRIO])
12059                 return -EINVAL;
12060
12061         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
12062         if (tsid >= IEEE80211_NUM_TIDS)
12063                 return -EINVAL;
12064
12065         up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);
12066         if (up >= IEEE80211_NUM_UPS)
12067                 return -EINVAL;
12068
12069         /* WMM uses TIDs 0-7 even for TSPEC */
12070         if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
12071                 /* TODO: handle 802.11 TSPEC/admission control
12072                  * need more attributes for that (e.g. BA session requirement);
12073                  * change the WMM adminssion test above to allow both then
12074                  */
12075                 return -EINVAL;
12076         }
12077
12078         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
12079
12080         if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
12081                 admitted_time =
12082                         nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
12083                 if (!admitted_time)
12084                         return -EINVAL;
12085         }
12086
12087         wdev_lock(wdev);
12088         switch (wdev->iftype) {
12089         case NL80211_IFTYPE_STATION:
12090         case NL80211_IFTYPE_P2P_CLIENT:
12091                 if (wdev->current_bss)
12092                         break;
12093                 err = -ENOTCONN;
12094                 goto out;
12095         default:
12096                 err = -EOPNOTSUPP;
12097                 goto out;
12098         }
12099
12100         err = rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
12101
12102  out:
12103         wdev_unlock(wdev);
12104         return err;
12105 }
12106
12107 static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
12108 {
12109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12110         struct net_device *dev = info->user_ptr[1];
12111         struct wireless_dev *wdev = dev->ieee80211_ptr;
12112         const u8 *peer;
12113         u8 tsid;
12114         int err;
12115
12116         if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
12117                 return -EINVAL;
12118
12119         tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
12120         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
12121
12122         wdev_lock(wdev);
12123         err = rdev_del_tx_ts(rdev, dev, tsid, peer);
12124         wdev_unlock(wdev);
12125
12126         return err;
12127 }
12128
12129 static int nl80211_tdls_channel_switch(struct sk_buff *skb,
12130                                        struct genl_info *info)
12131 {
12132         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12133         struct net_device *dev = info->user_ptr[1];
12134         struct wireless_dev *wdev = dev->ieee80211_ptr;
12135         struct cfg80211_chan_def chandef = {};
12136         const u8 *addr;
12137         u8 oper_class;
12138         int err;
12139
12140         if (!rdev->ops->tdls_channel_switch ||
12141             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
12142                 return -EOPNOTSUPP;
12143
12144         switch (dev->ieee80211_ptr->iftype) {
12145         case NL80211_IFTYPE_STATION:
12146         case NL80211_IFTYPE_P2P_CLIENT:
12147                 break;
12148         default:
12149                 return -EOPNOTSUPP;
12150         }
12151
12152         if (!info->attrs[NL80211_ATTR_MAC] ||
12153             !info->attrs[NL80211_ATTR_OPER_CLASS])
12154                 return -EINVAL;
12155
12156         err = nl80211_parse_chandef(rdev, info, &chandef);
12157         if (err)
12158                 return err;
12159
12160         /*
12161          * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
12162          * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
12163          * specification is not defined for them.
12164          */
12165         if (chandef.chan->band == NL80211_BAND_2GHZ &&
12166             chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
12167             chandef.width != NL80211_CHAN_WIDTH_20)
12168                 return -EINVAL;
12169
12170         /* we will be active on the TDLS link */
12171         if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
12172                                            wdev->iftype))
12173                 return -EINVAL;
12174
12175         /* don't allow switching to DFS channels */
12176         if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
12177                 return -EINVAL;
12178
12179         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
12180         oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);
12181
12182         wdev_lock(wdev);
12183         err = rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
12184         wdev_unlock(wdev);
12185
12186         return err;
12187 }
12188
12189 static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
12190                                               struct genl_info *info)
12191 {
12192         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12193         struct net_device *dev = info->user_ptr[1];
12194         struct wireless_dev *wdev = dev->ieee80211_ptr;
12195         const u8 *addr;
12196
12197         if (!rdev->ops->tdls_channel_switch ||
12198             !rdev->ops->tdls_cancel_channel_switch ||
12199             !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
12200                 return -EOPNOTSUPP;
12201
12202         switch (dev->ieee80211_ptr->iftype) {
12203         case NL80211_IFTYPE_STATION:
12204         case NL80211_IFTYPE_P2P_CLIENT:
12205                 break;
12206         default:
12207                 return -EOPNOTSUPP;
12208         }
12209
12210         if (!info->attrs[NL80211_ATTR_MAC])
12211                 return -EINVAL;
12212
12213         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
12214
12215         wdev_lock(wdev);
12216         rdev_tdls_cancel_channel_switch(rdev, dev, addr);
12217         wdev_unlock(wdev);
12218
12219         return 0;
12220 }
12221
12222 static int nl80211_set_multicast_to_unicast(struct sk_buff *skb,
12223                                             struct genl_info *info)
12224 {
12225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
12226         struct net_device *dev = info->user_ptr[1];
12227         struct wireless_dev *wdev = dev->ieee80211_ptr;
12228         const struct nlattr *nla;
12229         bool enabled;
12230
12231         if (!rdev->ops->set_multicast_to_unicast)
12232                 return -EOPNOTSUPP;
12233
12234         if (wdev->iftype != NL80211_IFTYPE_AP &&
12235             wdev->iftype != NL80211_IFTYPE_P2P_GO)
12236                 return -EOPNOTSUPP;
12237
12238         nla = info->attrs[NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED];
12239         enabled = nla_get_flag(nla);
12240
12241         return rdev_set_multicast_to_unicast(rdev, dev, enabled);
12242 }
12243
12244 #define NL80211_FLAG_NEED_WIPHY         0x01
12245 #define NL80211_FLAG_NEED_NETDEV        0x02
12246 #define NL80211_FLAG_NEED_RTNL          0x04
12247 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
12248 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
12249                                          NL80211_FLAG_CHECK_NETDEV_UP)
12250 #define NL80211_FLAG_NEED_WDEV          0x10
12251 /* If a netdev is associated, it must be UP, P2P must be started */
12252 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
12253                                          NL80211_FLAG_CHECK_NETDEV_UP)
12254 #define NL80211_FLAG_CLEAR_SKB          0x20
12255
12256 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
12257                             struct genl_info *info)
12258 {
12259         struct cfg80211_registered_device *rdev;
12260         struct wireless_dev *wdev;
12261         struct net_device *dev;
12262         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
12263
12264         if (rtnl)
12265                 rtnl_lock();
12266
12267         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
12268                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
12269                 if (IS_ERR(rdev)) {
12270                         if (rtnl)
12271                                 rtnl_unlock();
12272                         return PTR_ERR(rdev);
12273                 }
12274                 info->user_ptr[0] = rdev;
12275         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
12276                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
12277                 ASSERT_RTNL();
12278
12279                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
12280                                                   info->attrs);
12281                 if (IS_ERR(wdev)) {
12282                         if (rtnl)
12283                                 rtnl_unlock();
12284                         return PTR_ERR(wdev);
12285                 }
12286
12287                 dev = wdev->netdev;
12288                 rdev = wiphy_to_rdev(wdev->wiphy);
12289
12290                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
12291                         if (!dev) {
12292                                 if (rtnl)
12293                                         rtnl_unlock();
12294                                 return -EINVAL;
12295                         }
12296
12297                         info->user_ptr[1] = dev;
12298                 } else {
12299                         info->user_ptr[1] = wdev;
12300                 }
12301
12302                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
12303                     !wdev_running(wdev)) {
12304                         if (rtnl)
12305                                 rtnl_unlock();
12306                         return -ENETDOWN;
12307                 }
12308
12309                 if (dev)
12310                         dev_hold(dev);
12311
12312                 info->user_ptr[0] = rdev;
12313         }
12314
12315         return 0;
12316 }
12317
12318 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
12319                               struct genl_info *info)
12320 {
12321         if (info->user_ptr[1]) {
12322                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
12323                         struct wireless_dev *wdev = info->user_ptr[1];
12324
12325                         if (wdev->netdev)
12326                                 dev_put(wdev->netdev);
12327                 } else {
12328                         dev_put(info->user_ptr[1]);
12329                 }
12330         }
12331
12332         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
12333                 rtnl_unlock();
12334
12335         /* If needed, clear the netlink message payload from the SKB
12336          * as it might contain key data that shouldn't stick around on
12337          * the heap after the SKB is freed. The netlink message header
12338          * is still needed for further processing, so leave it intact.
12339          */
12340         if (ops->internal_flags & NL80211_FLAG_CLEAR_SKB) {
12341                 struct nlmsghdr *nlh = nlmsg_hdr(skb);
12342
12343                 memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
12344         }
12345 }
12346
12347 static const struct genl_ops nl80211_ops[] = {
12348         {
12349                 .cmd = NL80211_CMD_GET_WIPHY,
12350                 .doit = nl80211_get_wiphy,
12351                 .dumpit = nl80211_dump_wiphy,
12352                 .done = nl80211_dump_wiphy_done,
12353                 .policy = nl80211_policy,
12354                 /* can be retrieved by unprivileged users */
12355                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12356                                   NL80211_FLAG_NEED_RTNL,
12357         },
12358         {
12359                 .cmd = NL80211_CMD_SET_WIPHY,
12360                 .doit = nl80211_set_wiphy,
12361                 .policy = nl80211_policy,
12362                 .flags = GENL_UNS_ADMIN_PERM,
12363                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12364         },
12365         {
12366                 .cmd = NL80211_CMD_GET_INTERFACE,
12367                 .doit = nl80211_get_interface,
12368                 .dumpit = nl80211_dump_interface,
12369                 .policy = nl80211_policy,
12370                 /* can be retrieved by unprivileged users */
12371                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12372                                   NL80211_FLAG_NEED_RTNL,
12373         },
12374         {
12375                 .cmd = NL80211_CMD_SET_INTERFACE,
12376                 .doit = nl80211_set_interface,
12377                 .policy = nl80211_policy,
12378                 .flags = GENL_UNS_ADMIN_PERM,
12379                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12380                                   NL80211_FLAG_NEED_RTNL,
12381         },
12382         {
12383                 .cmd = NL80211_CMD_NEW_INTERFACE,
12384                 .doit = nl80211_new_interface,
12385                 .policy = nl80211_policy,
12386                 .flags = GENL_UNS_ADMIN_PERM,
12387                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12388                                   NL80211_FLAG_NEED_RTNL,
12389         },
12390         {
12391                 .cmd = NL80211_CMD_DEL_INTERFACE,
12392                 .doit = nl80211_del_interface,
12393                 .policy = nl80211_policy,
12394                 .flags = GENL_UNS_ADMIN_PERM,
12395                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12396                                   NL80211_FLAG_NEED_RTNL,
12397         },
12398         {
12399                 .cmd = NL80211_CMD_GET_KEY,
12400                 .doit = nl80211_get_key,
12401                 .policy = nl80211_policy,
12402                 .flags = GENL_UNS_ADMIN_PERM,
12403                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12404                                   NL80211_FLAG_NEED_RTNL,
12405         },
12406         {
12407                 .cmd = NL80211_CMD_SET_KEY,
12408                 .doit = nl80211_set_key,
12409                 .policy = nl80211_policy,
12410                 .flags = GENL_UNS_ADMIN_PERM,
12411                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12412                                   NL80211_FLAG_NEED_RTNL |
12413                                   NL80211_FLAG_CLEAR_SKB,
12414         },
12415         {
12416                 .cmd = NL80211_CMD_NEW_KEY,
12417                 .doit = nl80211_new_key,
12418                 .policy = nl80211_policy,
12419                 .flags = GENL_UNS_ADMIN_PERM,
12420                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12421                                   NL80211_FLAG_NEED_RTNL |
12422                                   NL80211_FLAG_CLEAR_SKB,
12423         },
12424         {
12425                 .cmd = NL80211_CMD_DEL_KEY,
12426                 .doit = nl80211_del_key,
12427                 .policy = nl80211_policy,
12428                 .flags = GENL_UNS_ADMIN_PERM,
12429                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12430                                   NL80211_FLAG_NEED_RTNL,
12431         },
12432         {
12433                 .cmd = NL80211_CMD_SET_BEACON,
12434                 .policy = nl80211_policy,
12435                 .flags = GENL_UNS_ADMIN_PERM,
12436                 .doit = nl80211_set_beacon,
12437                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12438                                   NL80211_FLAG_NEED_RTNL,
12439         },
12440         {
12441                 .cmd = NL80211_CMD_START_AP,
12442                 .policy = nl80211_policy,
12443                 .flags = GENL_UNS_ADMIN_PERM,
12444                 .doit = nl80211_start_ap,
12445                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12446                                   NL80211_FLAG_NEED_RTNL,
12447         },
12448         {
12449                 .cmd = NL80211_CMD_STOP_AP,
12450                 .policy = nl80211_policy,
12451                 .flags = GENL_UNS_ADMIN_PERM,
12452                 .doit = nl80211_stop_ap,
12453                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12454                                   NL80211_FLAG_NEED_RTNL,
12455         },
12456         {
12457                 .cmd = NL80211_CMD_GET_STATION,
12458                 .doit = nl80211_get_station,
12459                 .dumpit = nl80211_dump_station,
12460                 .policy = nl80211_policy,
12461                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12462                                   NL80211_FLAG_NEED_RTNL,
12463         },
12464         {
12465                 .cmd = NL80211_CMD_SET_STATION,
12466                 .doit = nl80211_set_station,
12467                 .policy = nl80211_policy,
12468                 .flags = GENL_UNS_ADMIN_PERM,
12469                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12470                                   NL80211_FLAG_NEED_RTNL,
12471         },
12472         {
12473                 .cmd = NL80211_CMD_NEW_STATION,
12474                 .doit = nl80211_new_station,
12475                 .policy = nl80211_policy,
12476                 .flags = GENL_UNS_ADMIN_PERM,
12477                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12478                                   NL80211_FLAG_NEED_RTNL,
12479         },
12480         {
12481                 .cmd = NL80211_CMD_DEL_STATION,
12482                 .doit = nl80211_del_station,
12483                 .policy = nl80211_policy,
12484                 .flags = GENL_UNS_ADMIN_PERM,
12485                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12486                                   NL80211_FLAG_NEED_RTNL,
12487         },
12488         {
12489                 .cmd = NL80211_CMD_GET_MPATH,
12490                 .doit = nl80211_get_mpath,
12491                 .dumpit = nl80211_dump_mpath,
12492                 .policy = nl80211_policy,
12493                 .flags = GENL_UNS_ADMIN_PERM,
12494                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12495                                   NL80211_FLAG_NEED_RTNL,
12496         },
12497         {
12498                 .cmd = NL80211_CMD_GET_MPP,
12499                 .doit = nl80211_get_mpp,
12500                 .dumpit = nl80211_dump_mpp,
12501                 .policy = nl80211_policy,
12502                 .flags = GENL_UNS_ADMIN_PERM,
12503                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12504                                   NL80211_FLAG_NEED_RTNL,
12505         },
12506         {
12507                 .cmd = NL80211_CMD_SET_MPATH,
12508                 .doit = nl80211_set_mpath,
12509                 .policy = nl80211_policy,
12510                 .flags = GENL_UNS_ADMIN_PERM,
12511                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12512                                   NL80211_FLAG_NEED_RTNL,
12513         },
12514         {
12515                 .cmd = NL80211_CMD_NEW_MPATH,
12516                 .doit = nl80211_new_mpath,
12517                 .policy = nl80211_policy,
12518                 .flags = GENL_UNS_ADMIN_PERM,
12519                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12520                                   NL80211_FLAG_NEED_RTNL,
12521         },
12522         {
12523                 .cmd = NL80211_CMD_DEL_MPATH,
12524                 .doit = nl80211_del_mpath,
12525                 .policy = nl80211_policy,
12526                 .flags = GENL_UNS_ADMIN_PERM,
12527                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12528                                   NL80211_FLAG_NEED_RTNL,
12529         },
12530         {
12531                 .cmd = NL80211_CMD_SET_BSS,
12532                 .doit = nl80211_set_bss,
12533                 .policy = nl80211_policy,
12534                 .flags = GENL_UNS_ADMIN_PERM,
12535                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12536                                   NL80211_FLAG_NEED_RTNL,
12537         },
12538         {
12539                 .cmd = NL80211_CMD_GET_REG,
12540                 .doit = nl80211_get_reg_do,
12541                 .dumpit = nl80211_get_reg_dump,
12542                 .policy = nl80211_policy,
12543                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12544                 /* can be retrieved by unprivileged users */
12545         },
12546 #ifdef CONFIG_CFG80211_CRDA_SUPPORT
12547         {
12548                 .cmd = NL80211_CMD_SET_REG,
12549                 .doit = nl80211_set_reg,
12550                 .policy = nl80211_policy,
12551                 .flags = GENL_ADMIN_PERM,
12552                 .internal_flags = NL80211_FLAG_NEED_RTNL,
12553         },
12554 #endif
12555         {
12556                 .cmd = NL80211_CMD_REQ_SET_REG,
12557                 .doit = nl80211_req_set_reg,
12558                 .policy = nl80211_policy,
12559                 .flags = GENL_ADMIN_PERM,
12560         },
12561         {
12562                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
12563                 .doit = nl80211_get_mesh_config,
12564                 .policy = nl80211_policy,
12565                 /* can be retrieved by unprivileged users */
12566                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12567                                   NL80211_FLAG_NEED_RTNL,
12568         },
12569         {
12570                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
12571                 .doit = nl80211_update_mesh_config,
12572                 .policy = nl80211_policy,
12573                 .flags = GENL_UNS_ADMIN_PERM,
12574                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12575                                   NL80211_FLAG_NEED_RTNL,
12576         },
12577         {
12578                 .cmd = NL80211_CMD_TRIGGER_SCAN,
12579                 .doit = nl80211_trigger_scan,
12580                 .policy = nl80211_policy,
12581                 .flags = GENL_UNS_ADMIN_PERM,
12582                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12583                                   NL80211_FLAG_NEED_RTNL,
12584         },
12585         {
12586                 .cmd = NL80211_CMD_ABORT_SCAN,
12587                 .doit = nl80211_abort_scan,
12588                 .policy = nl80211_policy,
12589                 .flags = GENL_UNS_ADMIN_PERM,
12590                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12591                                   NL80211_FLAG_NEED_RTNL,
12592         },
12593         {
12594                 .cmd = NL80211_CMD_GET_SCAN,
12595                 .policy = nl80211_policy,
12596                 .dumpit = nl80211_dump_scan,
12597         },
12598         {
12599                 .cmd = NL80211_CMD_START_SCHED_SCAN,
12600                 .doit = nl80211_start_sched_scan,
12601                 .policy = nl80211_policy,
12602                 .flags = GENL_UNS_ADMIN_PERM,
12603                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12604                                   NL80211_FLAG_NEED_RTNL,
12605         },
12606         {
12607                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
12608                 .doit = nl80211_stop_sched_scan,
12609                 .policy = nl80211_policy,
12610                 .flags = GENL_UNS_ADMIN_PERM,
12611                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12612                                   NL80211_FLAG_NEED_RTNL,
12613         },
12614         {
12615                 .cmd = NL80211_CMD_AUTHENTICATE,
12616                 .doit = nl80211_authenticate,
12617                 .policy = nl80211_policy,
12618                 .flags = GENL_UNS_ADMIN_PERM,
12619                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12620                                   NL80211_FLAG_NEED_RTNL |
12621                                   NL80211_FLAG_CLEAR_SKB,
12622         },
12623         {
12624                 .cmd = NL80211_CMD_ASSOCIATE,
12625                 .doit = nl80211_associate,
12626                 .policy = nl80211_policy,
12627                 .flags = GENL_UNS_ADMIN_PERM,
12628                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12629                                   NL80211_FLAG_NEED_RTNL,
12630         },
12631         {
12632                 .cmd = NL80211_CMD_DEAUTHENTICATE,
12633                 .doit = nl80211_deauthenticate,
12634                 .policy = nl80211_policy,
12635                 .flags = GENL_UNS_ADMIN_PERM,
12636                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12637                                   NL80211_FLAG_NEED_RTNL,
12638         },
12639         {
12640                 .cmd = NL80211_CMD_DISASSOCIATE,
12641                 .doit = nl80211_disassociate,
12642                 .policy = nl80211_policy,
12643                 .flags = GENL_UNS_ADMIN_PERM,
12644                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12645                                   NL80211_FLAG_NEED_RTNL,
12646         },
12647         {
12648                 .cmd = NL80211_CMD_JOIN_IBSS,
12649                 .doit = nl80211_join_ibss,
12650                 .policy = nl80211_policy,
12651                 .flags = GENL_UNS_ADMIN_PERM,
12652                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12653                                   NL80211_FLAG_NEED_RTNL,
12654         },
12655         {
12656                 .cmd = NL80211_CMD_LEAVE_IBSS,
12657                 .doit = nl80211_leave_ibss,
12658                 .policy = nl80211_policy,
12659                 .flags = GENL_UNS_ADMIN_PERM,
12660                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12661                                   NL80211_FLAG_NEED_RTNL,
12662         },
12663 #ifdef CONFIG_NL80211_TESTMODE
12664         {
12665                 .cmd = NL80211_CMD_TESTMODE,
12666                 .doit = nl80211_testmode_do,
12667                 .dumpit = nl80211_testmode_dump,
12668                 .policy = nl80211_policy,
12669                 .flags = GENL_UNS_ADMIN_PERM,
12670                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12671                                   NL80211_FLAG_NEED_RTNL,
12672         },
12673 #endif
12674         {
12675                 .cmd = NL80211_CMD_CONNECT,
12676                 .doit = nl80211_connect,
12677                 .policy = nl80211_policy,
12678                 .flags = GENL_UNS_ADMIN_PERM,
12679                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12680                                   NL80211_FLAG_NEED_RTNL,
12681         },
12682         {
12683                 .cmd = NL80211_CMD_UPDATE_CONNECT_PARAMS,
12684                 .doit = nl80211_update_connect_params,
12685                 .policy = nl80211_policy,
12686                 .flags = GENL_ADMIN_PERM,
12687                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12688                                   NL80211_FLAG_NEED_RTNL,
12689         },
12690         {
12691                 .cmd = NL80211_CMD_DISCONNECT,
12692                 .doit = nl80211_disconnect,
12693                 .policy = nl80211_policy,
12694                 .flags = GENL_UNS_ADMIN_PERM,
12695                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12696                                   NL80211_FLAG_NEED_RTNL,
12697         },
12698         {
12699                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
12700                 .doit = nl80211_wiphy_netns,
12701                 .policy = nl80211_policy,
12702                 .flags = GENL_UNS_ADMIN_PERM,
12703                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12704                                   NL80211_FLAG_NEED_RTNL,
12705         },
12706         {
12707                 .cmd = NL80211_CMD_GET_SURVEY,
12708                 .policy = nl80211_policy,
12709                 .dumpit = nl80211_dump_survey,
12710         },
12711         {
12712                 .cmd = NL80211_CMD_SET_PMKSA,
12713                 .doit = nl80211_setdel_pmksa,
12714                 .policy = nl80211_policy,
12715                 .flags = GENL_UNS_ADMIN_PERM,
12716                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12717                                   NL80211_FLAG_NEED_RTNL,
12718         },
12719         {
12720                 .cmd = NL80211_CMD_DEL_PMKSA,
12721                 .doit = nl80211_setdel_pmksa,
12722                 .policy = nl80211_policy,
12723                 .flags = GENL_UNS_ADMIN_PERM,
12724                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12725                                   NL80211_FLAG_NEED_RTNL,
12726         },
12727         {
12728                 .cmd = NL80211_CMD_FLUSH_PMKSA,
12729                 .doit = nl80211_flush_pmksa,
12730                 .policy = nl80211_policy,
12731                 .flags = GENL_UNS_ADMIN_PERM,
12732                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12733                                   NL80211_FLAG_NEED_RTNL,
12734         },
12735         {
12736                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
12737                 .doit = nl80211_remain_on_channel,
12738                 .policy = nl80211_policy,
12739                 .flags = GENL_UNS_ADMIN_PERM,
12740                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12741                                   NL80211_FLAG_NEED_RTNL,
12742         },
12743         {
12744                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
12745                 .doit = nl80211_cancel_remain_on_channel,
12746                 .policy = nl80211_policy,
12747                 .flags = GENL_UNS_ADMIN_PERM,
12748                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12749                                   NL80211_FLAG_NEED_RTNL,
12750         },
12751         {
12752                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
12753                 .doit = nl80211_set_tx_bitrate_mask,
12754                 .policy = nl80211_policy,
12755                 .flags = GENL_UNS_ADMIN_PERM,
12756                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12757                                   NL80211_FLAG_NEED_RTNL,
12758         },
12759         {
12760                 .cmd = NL80211_CMD_REGISTER_FRAME,
12761                 .doit = nl80211_register_mgmt,
12762                 .policy = nl80211_policy,
12763                 .flags = GENL_UNS_ADMIN_PERM,
12764                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12765                                   NL80211_FLAG_NEED_RTNL,
12766         },
12767         {
12768                 .cmd = NL80211_CMD_FRAME,
12769                 .doit = nl80211_tx_mgmt,
12770                 .policy = nl80211_policy,
12771                 .flags = GENL_UNS_ADMIN_PERM,
12772                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12773                                   NL80211_FLAG_NEED_RTNL,
12774         },
12775         {
12776                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
12777                 .doit = nl80211_tx_mgmt_cancel_wait,
12778                 .policy = nl80211_policy,
12779                 .flags = GENL_UNS_ADMIN_PERM,
12780                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12781                                   NL80211_FLAG_NEED_RTNL,
12782         },
12783         {
12784                 .cmd = NL80211_CMD_SET_POWER_SAVE,
12785                 .doit = nl80211_set_power_save,
12786                 .policy = nl80211_policy,
12787                 .flags = GENL_UNS_ADMIN_PERM,
12788                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12789                                   NL80211_FLAG_NEED_RTNL,
12790         },
12791         {
12792                 .cmd = NL80211_CMD_GET_POWER_SAVE,
12793                 .doit = nl80211_get_power_save,
12794                 .policy = nl80211_policy,
12795                 /* can be retrieved by unprivileged users */
12796                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12797                                   NL80211_FLAG_NEED_RTNL,
12798         },
12799         {
12800                 .cmd = NL80211_CMD_SET_CQM,
12801                 .doit = nl80211_set_cqm,
12802                 .policy = nl80211_policy,
12803                 .flags = GENL_UNS_ADMIN_PERM,
12804                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12805                                   NL80211_FLAG_NEED_RTNL,
12806         },
12807         {
12808                 .cmd = NL80211_CMD_SET_CHANNEL,
12809                 .doit = nl80211_set_channel,
12810                 .policy = nl80211_policy,
12811                 .flags = GENL_UNS_ADMIN_PERM,
12812                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12813                                   NL80211_FLAG_NEED_RTNL,
12814         },
12815         {
12816                 .cmd = NL80211_CMD_SET_WDS_PEER,
12817                 .doit = nl80211_set_wds_peer,
12818                 .policy = nl80211_policy,
12819                 .flags = GENL_UNS_ADMIN_PERM,
12820                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12821                                   NL80211_FLAG_NEED_RTNL,
12822         },
12823         {
12824                 .cmd = NL80211_CMD_JOIN_MESH,
12825                 .doit = nl80211_join_mesh,
12826                 .policy = nl80211_policy,
12827                 .flags = GENL_UNS_ADMIN_PERM,
12828                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12829                                   NL80211_FLAG_NEED_RTNL,
12830         },
12831         {
12832                 .cmd = NL80211_CMD_LEAVE_MESH,
12833                 .doit = nl80211_leave_mesh,
12834                 .policy = nl80211_policy,
12835                 .flags = GENL_UNS_ADMIN_PERM,
12836                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12837                                   NL80211_FLAG_NEED_RTNL,
12838         },
12839         {
12840                 .cmd = NL80211_CMD_JOIN_OCB,
12841                 .doit = nl80211_join_ocb,
12842                 .policy = nl80211_policy,
12843                 .flags = GENL_UNS_ADMIN_PERM,
12844                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12845                                   NL80211_FLAG_NEED_RTNL,
12846         },
12847         {
12848                 .cmd = NL80211_CMD_LEAVE_OCB,
12849                 .doit = nl80211_leave_ocb,
12850                 .policy = nl80211_policy,
12851                 .flags = GENL_UNS_ADMIN_PERM,
12852                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12853                                   NL80211_FLAG_NEED_RTNL,
12854         },
12855 #ifdef CONFIG_PM
12856         {
12857                 .cmd = NL80211_CMD_GET_WOWLAN,
12858                 .doit = nl80211_get_wowlan,
12859                 .policy = nl80211_policy,
12860                 /* can be retrieved by unprivileged users */
12861                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12862                                   NL80211_FLAG_NEED_RTNL,
12863         },
12864         {
12865                 .cmd = NL80211_CMD_SET_WOWLAN,
12866                 .doit = nl80211_set_wowlan,
12867                 .policy = nl80211_policy,
12868                 .flags = GENL_UNS_ADMIN_PERM,
12869                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12870                                   NL80211_FLAG_NEED_RTNL,
12871         },
12872 #endif
12873         {
12874                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
12875                 .doit = nl80211_set_rekey_data,
12876                 .policy = nl80211_policy,
12877                 .flags = GENL_UNS_ADMIN_PERM,
12878                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12879                                   NL80211_FLAG_NEED_RTNL |
12880                                   NL80211_FLAG_CLEAR_SKB,
12881         },
12882         {
12883                 .cmd = NL80211_CMD_TDLS_MGMT,
12884                 .doit = nl80211_tdls_mgmt,
12885                 .policy = nl80211_policy,
12886                 .flags = GENL_UNS_ADMIN_PERM,
12887                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12888                                   NL80211_FLAG_NEED_RTNL,
12889         },
12890         {
12891                 .cmd = NL80211_CMD_TDLS_OPER,
12892                 .doit = nl80211_tdls_oper,
12893                 .policy = nl80211_policy,
12894                 .flags = GENL_UNS_ADMIN_PERM,
12895                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12896                                   NL80211_FLAG_NEED_RTNL,
12897         },
12898         {
12899                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
12900                 .doit = nl80211_register_unexpected_frame,
12901                 .policy = nl80211_policy,
12902                 .flags = GENL_UNS_ADMIN_PERM,
12903                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12904                                   NL80211_FLAG_NEED_RTNL,
12905         },
12906         {
12907                 .cmd = NL80211_CMD_PROBE_CLIENT,
12908                 .doit = nl80211_probe_client,
12909                 .policy = nl80211_policy,
12910                 .flags = GENL_UNS_ADMIN_PERM,
12911                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
12912                                   NL80211_FLAG_NEED_RTNL,
12913         },
12914         {
12915                 .cmd = NL80211_CMD_REGISTER_BEACONS,
12916                 .doit = nl80211_register_beacons,
12917                 .policy = nl80211_policy,
12918                 .flags = GENL_UNS_ADMIN_PERM,
12919                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
12920                                   NL80211_FLAG_NEED_RTNL,
12921         },
12922         {
12923                 .cmd = NL80211_CMD_SET_NOACK_MAP,
12924                 .doit = nl80211_set_noack_map,
12925                 .policy = nl80211_policy,
12926                 .flags = GENL_UNS_ADMIN_PERM,
12927                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12928                                   NL80211_FLAG_NEED_RTNL,
12929         },
12930         {
12931                 .cmd = NL80211_CMD_START_P2P_DEVICE,
12932                 .doit = nl80211_start_p2p_device,
12933                 .policy = nl80211_policy,
12934                 .flags = GENL_UNS_ADMIN_PERM,
12935                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12936                                   NL80211_FLAG_NEED_RTNL,
12937         },
12938         {
12939                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
12940                 .doit = nl80211_stop_p2p_device,
12941                 .policy = nl80211_policy,
12942                 .flags = GENL_UNS_ADMIN_PERM,
12943                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12944                                   NL80211_FLAG_NEED_RTNL,
12945         },
12946         {
12947                 .cmd = NL80211_CMD_START_NAN,
12948                 .doit = nl80211_start_nan,
12949                 .policy = nl80211_policy,
12950                 .flags = GENL_ADMIN_PERM,
12951                 .internal_flags = NL80211_FLAG_NEED_WDEV |
12952                                   NL80211_FLAG_NEED_RTNL,
12953         },
12954         {
12955                 .cmd = NL80211_CMD_STOP_NAN,
12956                 .doit = nl80211_stop_nan,
12957                 .policy = nl80211_policy,
12958                 .flags = GENL_ADMIN_PERM,
12959                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12960                                   NL80211_FLAG_NEED_RTNL,
12961         },
12962         {
12963                 .cmd = NL80211_CMD_ADD_NAN_FUNCTION,
12964                 .doit = nl80211_nan_add_func,
12965                 .policy = nl80211_policy,
12966                 .flags = GENL_ADMIN_PERM,
12967                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12968                                   NL80211_FLAG_NEED_RTNL,
12969         },
12970         {
12971                 .cmd = NL80211_CMD_DEL_NAN_FUNCTION,
12972                 .doit = nl80211_nan_del_func,
12973                 .policy = nl80211_policy,
12974                 .flags = GENL_ADMIN_PERM,
12975                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12976                                   NL80211_FLAG_NEED_RTNL,
12977         },
12978         {
12979                 .cmd = NL80211_CMD_CHANGE_NAN_CONFIG,
12980                 .doit = nl80211_nan_change_config,
12981                 .policy = nl80211_policy,
12982                 .flags = GENL_ADMIN_PERM,
12983                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
12984                                   NL80211_FLAG_NEED_RTNL,
12985         },
12986         {
12987                 .cmd = NL80211_CMD_SET_MCAST_RATE,
12988                 .doit = nl80211_set_mcast_rate,
12989                 .policy = nl80211_policy,
12990                 .flags = GENL_UNS_ADMIN_PERM,
12991                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
12992                                   NL80211_FLAG_NEED_RTNL,
12993         },
12994         {
12995                 .cmd = NL80211_CMD_SET_MAC_ACL,
12996                 .doit = nl80211_set_mac_acl,
12997                 .policy = nl80211_policy,
12998                 .flags = GENL_UNS_ADMIN_PERM,
12999                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13000                                   NL80211_FLAG_NEED_RTNL,
13001         },
13002         {
13003                 .cmd = NL80211_CMD_RADAR_DETECT,
13004                 .doit = nl80211_start_radar_detection,
13005                 .policy = nl80211_policy,
13006                 .flags = GENL_UNS_ADMIN_PERM,
13007                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13008                                   NL80211_FLAG_NEED_RTNL,
13009         },
13010         {
13011                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
13012                 .doit = nl80211_get_protocol_features,
13013                 .policy = nl80211_policy,
13014         },
13015         {
13016                 .cmd = NL80211_CMD_UPDATE_FT_IES,
13017                 .doit = nl80211_update_ft_ies,
13018                 .policy = nl80211_policy,
13019                 .flags = GENL_UNS_ADMIN_PERM,
13020                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13021                                   NL80211_FLAG_NEED_RTNL,
13022         },
13023         {
13024                 .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
13025                 .doit = nl80211_crit_protocol_start,
13026                 .policy = nl80211_policy,
13027                 .flags = GENL_UNS_ADMIN_PERM,
13028                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13029                                   NL80211_FLAG_NEED_RTNL,
13030         },
13031         {
13032                 .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
13033                 .doit = nl80211_crit_protocol_stop,
13034                 .policy = nl80211_policy,
13035                 .flags = GENL_UNS_ADMIN_PERM,
13036                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
13037                                   NL80211_FLAG_NEED_RTNL,
13038         },
13039         {
13040                 .cmd = NL80211_CMD_GET_COALESCE,
13041                 .doit = nl80211_get_coalesce,
13042                 .policy = nl80211_policy,
13043                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13044                                   NL80211_FLAG_NEED_RTNL,
13045         },
13046         {
13047                 .cmd = NL80211_CMD_SET_COALESCE,
13048                 .doit = nl80211_set_coalesce,
13049                 .policy = nl80211_policy,
13050                 .flags = GENL_UNS_ADMIN_PERM,
13051                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13052                                   NL80211_FLAG_NEED_RTNL,
13053         },
13054         {
13055                 .cmd = NL80211_CMD_CHANNEL_SWITCH,
13056                 .doit = nl80211_channel_switch,
13057                 .policy = nl80211_policy,
13058                 .flags = GENL_UNS_ADMIN_PERM,
13059                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13060                                   NL80211_FLAG_NEED_RTNL,
13061         },
13062         {
13063                 .cmd = NL80211_CMD_VENDOR,
13064                 .doit = nl80211_vendor_cmd,
13065                 .dumpit = nl80211_vendor_cmd_dump,
13066                 .policy = nl80211_policy,
13067                 .flags = GENL_UNS_ADMIN_PERM,
13068                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
13069                                   NL80211_FLAG_NEED_RTNL,
13070         },
13071         {
13072                 .cmd = NL80211_CMD_SET_QOS_MAP,
13073                 .doit = nl80211_set_qos_map,
13074                 .policy = nl80211_policy,
13075                 .flags = GENL_UNS_ADMIN_PERM,
13076                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13077                                   NL80211_FLAG_NEED_RTNL,
13078         },
13079         {
13080                 .cmd = NL80211_CMD_ADD_TX_TS,
13081                 .doit = nl80211_add_tx_ts,
13082                 .policy = nl80211_policy,
13083                 .flags = GENL_UNS_ADMIN_PERM,
13084                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13085                                   NL80211_FLAG_NEED_RTNL,
13086         },
13087         {
13088                 .cmd = NL80211_CMD_DEL_TX_TS,
13089                 .doit = nl80211_del_tx_ts,
13090                 .policy = nl80211_policy,
13091                 .flags = GENL_UNS_ADMIN_PERM,
13092                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13093                                   NL80211_FLAG_NEED_RTNL,
13094         },
13095         {
13096                 .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
13097                 .doit = nl80211_tdls_channel_switch,
13098                 .policy = nl80211_policy,
13099                 .flags = GENL_UNS_ADMIN_PERM,
13100                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13101                                   NL80211_FLAG_NEED_RTNL,
13102         },
13103         {
13104                 .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
13105                 .doit = nl80211_tdls_cancel_channel_switch,
13106                 .policy = nl80211_policy,
13107                 .flags = GENL_UNS_ADMIN_PERM,
13108                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
13109                                   NL80211_FLAG_NEED_RTNL,
13110         },
13111         {
13112                 .cmd = NL80211_CMD_SET_MULTICAST_TO_UNICAST,
13113                 .doit = nl80211_set_multicast_to_unicast,
13114                 .policy = nl80211_policy,
13115                 .flags = GENL_UNS_ADMIN_PERM,
13116                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
13117                                   NL80211_FLAG_NEED_RTNL,
13118         },
13119 };
13120
13121 static struct genl_family nl80211_fam __ro_after_init = {
13122         .name = NL80211_GENL_NAME,      /* have users key off the name instead */
13123         .hdrsize = 0,                   /* no private header */
13124         .version = 1,                   /* no particular meaning now */
13125         .maxattr = NL80211_ATTR_MAX,
13126         .netnsok = true,
13127         .pre_doit = nl80211_pre_doit,
13128         .post_doit = nl80211_post_doit,
13129         .module = THIS_MODULE,
13130         .ops = nl80211_ops,
13131         .n_ops = ARRAY_SIZE(nl80211_ops),
13132         .mcgrps = nl80211_mcgrps,
13133         .n_mcgrps = ARRAY_SIZE(nl80211_mcgrps),
13134 };
13135
13136 /* notification functions */
13137
13138 void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
13139                           enum nl80211_commands cmd)
13140 {
13141         struct sk_buff *msg;
13142         struct nl80211_dump_wiphy_state state = {};
13143
13144         WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
13145                 cmd != NL80211_CMD_DEL_WIPHY);
13146
13147         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13148         if (!msg)
13149                 return;
13150
13151         if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
13152                 nlmsg_free(msg);
13153                 return;
13154         }
13155
13156         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13157                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
13158 }
13159
13160 void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
13161                                 struct wireless_dev *wdev,
13162                                 enum nl80211_commands cmd)
13163 {
13164         struct sk_buff *msg;
13165
13166         WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
13167                 cmd != NL80211_CMD_DEL_INTERFACE);
13168
13169         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13170         if (!msg)
13171                 return;
13172
13173         if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev,
13174                                cmd == NL80211_CMD_DEL_INTERFACE) < 0) {
13175                 nlmsg_free(msg);
13176                 return;
13177         }
13178
13179         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13180                                 NL80211_MCGRP_CONFIG, GFP_KERNEL);
13181 }
13182
13183 static int nl80211_add_scan_req(struct sk_buff *msg,
13184                                 struct cfg80211_registered_device *rdev)
13185 {
13186         struct cfg80211_scan_request *req = rdev->scan_req;
13187         struct nlattr *nest;
13188         int i;
13189
13190         if (WARN_ON(!req))
13191                 return 0;
13192
13193         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
13194         if (!nest)
13195                 goto nla_put_failure;
13196         for (i = 0; i < req->n_ssids; i++) {
13197                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
13198                         goto nla_put_failure;
13199         }
13200         nla_nest_end(msg, nest);
13201
13202         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
13203         if (!nest)
13204                 goto nla_put_failure;
13205         for (i = 0; i < req->n_channels; i++) {
13206                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
13207                         goto nla_put_failure;
13208         }
13209         nla_nest_end(msg, nest);
13210
13211         if (req->ie &&
13212             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
13213                 goto nla_put_failure;
13214
13215         if (req->flags &&
13216             nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
13217                 goto nla_put_failure;
13218
13219         if (req->info.scan_start_tsf &&
13220             (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
13221                                req->info.scan_start_tsf, NL80211_BSS_PAD) ||
13222              nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
13223                      req->info.tsf_bssid)))
13224                 goto nla_put_failure;
13225
13226         return 0;
13227  nla_put_failure:
13228         return -ENOBUFS;
13229 }
13230
13231 static int nl80211_prep_scan_msg(struct sk_buff *msg,
13232                                  struct cfg80211_registered_device *rdev,
13233                                  struct wireless_dev *wdev,
13234                                  u32 portid, u32 seq, int flags,
13235                                  u32 cmd)
13236 {
13237         void *hdr;
13238
13239         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
13240         if (!hdr)
13241                 return -1;
13242
13243         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13244             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13245                                          wdev->netdev->ifindex)) ||
13246             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13247                               NL80211_ATTR_PAD))
13248                 goto nla_put_failure;
13249
13250         /* ignore errors and send incomplete event anyway */
13251         nl80211_add_scan_req(msg, rdev);
13252
13253         genlmsg_end(msg, hdr);
13254         return 0;
13255
13256  nla_put_failure:
13257         genlmsg_cancel(msg, hdr);
13258         return -EMSGSIZE;
13259 }
13260
13261 static int
13262 nl80211_prep_sched_scan_msg(struct sk_buff *msg,
13263                             struct cfg80211_sched_scan_request *req, u32 cmd)
13264 {
13265         void *hdr;
13266
13267         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13268         if (!hdr)
13269                 return -1;
13270
13271         if (nla_put_u32(msg, NL80211_ATTR_WIPHY,
13272                         wiphy_to_rdev(req->wiphy)->wiphy_idx) ||
13273             nla_put_u32(msg, NL80211_ATTR_IFINDEX, req->dev->ifindex) ||
13274             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->reqid,
13275                               NL80211_ATTR_PAD))
13276                 goto nla_put_failure;
13277
13278         genlmsg_end(msg, hdr);
13279         return 0;
13280
13281  nla_put_failure:
13282         genlmsg_cancel(msg, hdr);
13283         return -EMSGSIZE;
13284 }
13285
13286 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
13287                              struct wireless_dev *wdev)
13288 {
13289         struct sk_buff *msg;
13290
13291         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13292         if (!msg)
13293                 return;
13294
13295         if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
13296                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
13297                 nlmsg_free(msg);
13298                 return;
13299         }
13300
13301         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13302                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13303 }
13304
13305 struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
13306                                        struct wireless_dev *wdev, bool aborted)
13307 {
13308         struct sk_buff *msg;
13309
13310         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13311         if (!msg)
13312                 return NULL;
13313
13314         if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
13315                                   aborted ? NL80211_CMD_SCAN_ABORTED :
13316                                             NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
13317                 nlmsg_free(msg);
13318                 return NULL;
13319         }
13320
13321         return msg;
13322 }
13323
13324 /* send message created by nl80211_build_scan_msg() */
13325 void nl80211_send_scan_msg(struct cfg80211_registered_device *rdev,
13326                            struct sk_buff *msg)
13327 {
13328         if (!msg)
13329                 return;
13330
13331         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13332                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13333 }
13334
13335 void nl80211_send_sched_scan(struct cfg80211_sched_scan_request *req, u32 cmd)
13336 {
13337         struct sk_buff *msg;
13338
13339         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13340         if (!msg)
13341                 return;
13342
13343         if (nl80211_prep_sched_scan_msg(msg, req, cmd) < 0) {
13344                 nlmsg_free(msg);
13345                 return;
13346         }
13347
13348         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(req->wiphy), msg, 0,
13349                                 NL80211_MCGRP_SCAN, GFP_KERNEL);
13350 }
13351
13352 static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
13353                                           struct regulatory_request *request)
13354 {
13355         /* Userspace can always count this one always being set */
13356         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
13357                 goto nla_put_failure;
13358
13359         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
13360                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13361                                NL80211_REGDOM_TYPE_WORLD))
13362                         goto nla_put_failure;
13363         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
13364                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13365                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
13366                         goto nla_put_failure;
13367         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
13368                    request->intersect) {
13369                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13370                                NL80211_REGDOM_TYPE_INTERSECTION))
13371                         goto nla_put_failure;
13372         } else {
13373                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
13374                                NL80211_REGDOM_TYPE_COUNTRY) ||
13375                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
13376                                    request->alpha2))
13377                         goto nla_put_failure;
13378         }
13379
13380         if (request->wiphy_idx != WIPHY_IDX_INVALID) {
13381                 struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);
13382
13383                 if (wiphy &&
13384                     nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
13385                         goto nla_put_failure;
13386
13387                 if (wiphy &&
13388                     wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
13389                     nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
13390                         goto nla_put_failure;
13391         }
13392
13393         return true;
13394
13395 nla_put_failure:
13396         return false;
13397 }
13398
13399 /*
13400  * This can happen on global regulatory changes or device specific settings
13401  * based on custom regulatory domains.
13402  */
13403 void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
13404                                      struct regulatory_request *request)
13405 {
13406         struct sk_buff *msg;
13407         void *hdr;
13408
13409         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
13410         if (!msg)
13411                 return;
13412
13413         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
13414         if (!hdr) {
13415                 nlmsg_free(msg);
13416                 return;
13417         }
13418
13419         if (nl80211_reg_change_event_fill(msg, request) == false)
13420                 goto nla_put_failure;
13421
13422         genlmsg_end(msg, hdr);
13423
13424         rcu_read_lock();
13425         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
13426                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
13427         rcu_read_unlock();
13428
13429         return;
13430
13431 nla_put_failure:
13432         genlmsg_cancel(msg, hdr);
13433         nlmsg_free(msg);
13434 }
13435
13436 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
13437                                     struct net_device *netdev,
13438                                     const u8 *buf, size_t len,
13439                                     enum nl80211_commands cmd, gfp_t gfp,
13440                                     int uapsd_queues)
13441 {
13442         struct sk_buff *msg;
13443         void *hdr;
13444
13445         msg = nlmsg_new(100 + len, gfp);
13446         if (!msg)
13447                 return;
13448
13449         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13450         if (!hdr) {
13451                 nlmsg_free(msg);
13452                 return;
13453         }
13454
13455         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13456             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13457             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
13458                 goto nla_put_failure;
13459
13460         if (uapsd_queues >= 0) {
13461                 struct nlattr *nla_wmm =
13462                         nla_nest_start(msg, NL80211_ATTR_STA_WME);
13463                 if (!nla_wmm)
13464                         goto nla_put_failure;
13465
13466                 if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
13467                                uapsd_queues))
13468                         goto nla_put_failure;
13469
13470                 nla_nest_end(msg, nla_wmm);
13471         }
13472
13473         genlmsg_end(msg, hdr);
13474
13475         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13476                                 NL80211_MCGRP_MLME, gfp);
13477         return;
13478
13479  nla_put_failure:
13480         genlmsg_cancel(msg, hdr);
13481         nlmsg_free(msg);
13482 }
13483
13484 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
13485                           struct net_device *netdev, const u8 *buf,
13486                           size_t len, gfp_t gfp)
13487 {
13488         nl80211_send_mlme_event(rdev, netdev, buf, len,
13489                                 NL80211_CMD_AUTHENTICATE, gfp, -1);
13490 }
13491
13492 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
13493                            struct net_device *netdev, const u8 *buf,
13494                            size_t len, gfp_t gfp, int uapsd_queues)
13495 {
13496         nl80211_send_mlme_event(rdev, netdev, buf, len,
13497                                 NL80211_CMD_ASSOCIATE, gfp, uapsd_queues);
13498 }
13499
13500 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
13501                          struct net_device *netdev, const u8 *buf,
13502                          size_t len, gfp_t gfp)
13503 {
13504         nl80211_send_mlme_event(rdev, netdev, buf, len,
13505                                 NL80211_CMD_DEAUTHENTICATE, gfp, -1);
13506 }
13507
13508 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
13509                            struct net_device *netdev, const u8 *buf,
13510                            size_t len, gfp_t gfp)
13511 {
13512         nl80211_send_mlme_event(rdev, netdev, buf, len,
13513                                 NL80211_CMD_DISASSOCIATE, gfp, -1);
13514 }
13515
13516 void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
13517                                   size_t len)
13518 {
13519         struct wireless_dev *wdev = dev->ieee80211_ptr;
13520         struct wiphy *wiphy = wdev->wiphy;
13521         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13522         const struct ieee80211_mgmt *mgmt = (void *)buf;
13523         u32 cmd;
13524
13525         if (WARN_ON(len < 2))
13526                 return;
13527
13528         if (ieee80211_is_deauth(mgmt->frame_control))
13529                 cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
13530         else
13531                 cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
13532
13533         trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
13534         nl80211_send_mlme_event(rdev, dev, buf, len, cmd, GFP_ATOMIC, -1);
13535 }
13536 EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);
13537
13538 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
13539                                       struct net_device *netdev, int cmd,
13540                                       const u8 *addr, gfp_t gfp)
13541 {
13542         struct sk_buff *msg;
13543         void *hdr;
13544
13545         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13546         if (!msg)
13547                 return;
13548
13549         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13550         if (!hdr) {
13551                 nlmsg_free(msg);
13552                 return;
13553         }
13554
13555         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13556             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13557             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
13558             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
13559                 goto nla_put_failure;
13560
13561         genlmsg_end(msg, hdr);
13562
13563         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13564                                 NL80211_MCGRP_MLME, gfp);
13565         return;
13566
13567  nla_put_failure:
13568         genlmsg_cancel(msg, hdr);
13569         nlmsg_free(msg);
13570 }
13571
13572 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
13573                                struct net_device *netdev, const u8 *addr,
13574                                gfp_t gfp)
13575 {
13576         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
13577                                   addr, gfp);
13578 }
13579
13580 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
13581                                 struct net_device *netdev, const u8 *addr,
13582                                 gfp_t gfp)
13583 {
13584         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
13585                                   addr, gfp);
13586 }
13587
13588 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
13589                                  struct net_device *netdev,
13590                                  struct cfg80211_connect_resp_params *cr,
13591                                  gfp_t gfp)
13592 {
13593         struct sk_buff *msg;
13594         void *hdr;
13595
13596         msg = nlmsg_new(100 + cr->req_ie_len + cr->resp_ie_len +
13597                         cr->fils_kek_len + cr->pmk_len +
13598                         (cr->pmkid ? WLAN_PMKID_LEN : 0), gfp);
13599         if (!msg)
13600                 return;
13601
13602         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
13603         if (!hdr) {
13604                 nlmsg_free(msg);
13605                 return;
13606         }
13607
13608         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13609             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13610             (cr->bssid &&
13611              nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, cr->bssid)) ||
13612             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
13613                         cr->status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
13614                         cr->status) ||
13615             (cr->status < 0 &&
13616              (nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
13617               nla_put_u32(msg, NL80211_ATTR_TIMEOUT_REASON,
13618                           cr->timeout_reason))) ||
13619             (cr->req_ie &&
13620              nla_put(msg, NL80211_ATTR_REQ_IE, cr->req_ie_len, cr->req_ie)) ||
13621             (cr->resp_ie &&
13622              nla_put(msg, NL80211_ATTR_RESP_IE, cr->resp_ie_len,
13623                      cr->resp_ie)) ||
13624             (cr->update_erp_next_seq_num &&
13625              nla_put_u16(msg, NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM,
13626                          cr->fils_erp_next_seq_num)) ||
13627             (cr->status == WLAN_STATUS_SUCCESS &&
13628              ((cr->fils_kek &&
13629                nla_put(msg, NL80211_ATTR_FILS_KEK, cr->fils_kek_len,
13630                        cr->fils_kek)) ||
13631               (cr->pmk &&
13632                nla_put(msg, NL80211_ATTR_PMK, cr->pmk_len, cr->pmk)) ||
13633               (cr->pmkid &&
13634                nla_put(msg, NL80211_ATTR_PMKID, WLAN_PMKID_LEN, cr->pmkid)))))
13635                 goto nla_put_failure;
13636
13637         genlmsg_end(msg, hdr);
13638
13639         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13640                                 NL80211_MCGRP_MLME, gfp);
13641         return;
13642
13643  nla_put_failure:
13644         genlmsg_cancel(msg, hdr);
13645         nlmsg_free(msg);
13646 }
13647
13648 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
13649                          struct net_device *netdev,
13650                          struct cfg80211_roam_info *info, gfp_t gfp)
13651 {
13652         struct sk_buff *msg;
13653         void *hdr;
13654         const u8 *bssid = info->bss ? info->bss->bssid : info->bssid;
13655
13656         msg = nlmsg_new(100 + info->req_ie_len + info->resp_ie_len, gfp);
13657         if (!msg)
13658                 return;
13659
13660         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
13661         if (!hdr) {
13662                 nlmsg_free(msg);
13663                 return;
13664         }
13665
13666         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13667             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13668             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
13669             (info->req_ie &&
13670              nla_put(msg, NL80211_ATTR_REQ_IE, info->req_ie_len,
13671                      info->req_ie)) ||
13672             (info->resp_ie &&
13673              nla_put(msg, NL80211_ATTR_RESP_IE, info->resp_ie_len,
13674                      info->resp_ie)))
13675                 goto nla_put_failure;
13676
13677         genlmsg_end(msg, hdr);
13678
13679         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13680                                 NL80211_MCGRP_MLME, gfp);
13681         return;
13682
13683  nla_put_failure:
13684         genlmsg_cancel(msg, hdr);
13685         nlmsg_free(msg);
13686 }
13687
13688 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
13689                                struct net_device *netdev, u16 reason,
13690                                const u8 *ie, size_t ie_len, bool from_ap)
13691 {
13692         struct sk_buff *msg;
13693         void *hdr;
13694
13695         msg = nlmsg_new(100 + ie_len, GFP_KERNEL);
13696         if (!msg)
13697                 return;
13698
13699         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
13700         if (!hdr) {
13701                 nlmsg_free(msg);
13702                 return;
13703         }
13704
13705         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13706             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13707             (from_ap && reason &&
13708              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
13709             (from_ap &&
13710              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
13711             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
13712                 goto nla_put_failure;
13713
13714         genlmsg_end(msg, hdr);
13715
13716         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13717                                 NL80211_MCGRP_MLME, GFP_KERNEL);
13718         return;
13719
13720  nla_put_failure:
13721         genlmsg_cancel(msg, hdr);
13722         nlmsg_free(msg);
13723 }
13724
13725 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
13726                              struct net_device *netdev, const u8 *bssid,
13727                              gfp_t gfp)
13728 {
13729         struct sk_buff *msg;
13730         void *hdr;
13731
13732         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13733         if (!msg)
13734                 return;
13735
13736         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
13737         if (!hdr) {
13738                 nlmsg_free(msg);
13739                 return;
13740         }
13741
13742         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13743             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13744             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
13745                 goto nla_put_failure;
13746
13747         genlmsg_end(msg, hdr);
13748
13749         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13750                                 NL80211_MCGRP_MLME, gfp);
13751         return;
13752
13753  nla_put_failure:
13754         genlmsg_cancel(msg, hdr);
13755         nlmsg_free(msg);
13756 }
13757
13758 void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
13759                                         const u8* ie, u8 ie_len, gfp_t gfp)
13760 {
13761         struct wireless_dev *wdev = dev->ieee80211_ptr;
13762         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
13763         struct sk_buff *msg;
13764         void *hdr;
13765
13766         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
13767                 return;
13768
13769         trace_cfg80211_notify_new_peer_candidate(dev, addr);
13770
13771         msg = nlmsg_new(100 + ie_len, gfp);
13772         if (!msg)
13773                 return;
13774
13775         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
13776         if (!hdr) {
13777                 nlmsg_free(msg);
13778                 return;
13779         }
13780
13781         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13782             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
13783             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
13784             (ie_len && ie &&
13785              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
13786                 goto nla_put_failure;
13787
13788         genlmsg_end(msg, hdr);
13789
13790         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13791                                 NL80211_MCGRP_MLME, gfp);
13792         return;
13793
13794  nla_put_failure:
13795         genlmsg_cancel(msg, hdr);
13796         nlmsg_free(msg);
13797 }
13798 EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);
13799
13800 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
13801                                  struct net_device *netdev, const u8 *addr,
13802                                  enum nl80211_key_type key_type, int key_id,
13803                                  const u8 *tsc, gfp_t gfp)
13804 {
13805         struct sk_buff *msg;
13806         void *hdr;
13807
13808         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13809         if (!msg)
13810                 return;
13811
13812         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
13813         if (!hdr) {
13814                 nlmsg_free(msg);
13815                 return;
13816         }
13817
13818         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13819             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
13820             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
13821             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
13822             (key_id != -1 &&
13823              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
13824             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
13825                 goto nla_put_failure;
13826
13827         genlmsg_end(msg, hdr);
13828
13829         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13830                                 NL80211_MCGRP_MLME, gfp);
13831         return;
13832
13833  nla_put_failure:
13834         genlmsg_cancel(msg, hdr);
13835         nlmsg_free(msg);
13836 }
13837
13838 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
13839                                     struct ieee80211_channel *channel_before,
13840                                     struct ieee80211_channel *channel_after)
13841 {
13842         struct sk_buff *msg;
13843         void *hdr;
13844         struct nlattr *nl_freq;
13845
13846         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
13847         if (!msg)
13848                 return;
13849
13850         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
13851         if (!hdr) {
13852                 nlmsg_free(msg);
13853                 return;
13854         }
13855
13856         /*
13857          * Since we are applying the beacon hint to a wiphy we know its
13858          * wiphy_idx is valid
13859          */
13860         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
13861                 goto nla_put_failure;
13862
13863         /* Before */
13864         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
13865         if (!nl_freq)
13866                 goto nla_put_failure;
13867         if (nl80211_msg_put_channel(msg, channel_before, false))
13868                 goto nla_put_failure;
13869         nla_nest_end(msg, nl_freq);
13870
13871         /* After */
13872         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
13873         if (!nl_freq)
13874                 goto nla_put_failure;
13875         if (nl80211_msg_put_channel(msg, channel_after, false))
13876                 goto nla_put_failure;
13877         nla_nest_end(msg, nl_freq);
13878
13879         genlmsg_end(msg, hdr);
13880
13881         rcu_read_lock();
13882         genlmsg_multicast_allns(&nl80211_fam, msg, 0,
13883                                 NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
13884         rcu_read_unlock();
13885
13886         return;
13887
13888 nla_put_failure:
13889         genlmsg_cancel(msg, hdr);
13890         nlmsg_free(msg);
13891 }
13892
13893 static void nl80211_send_remain_on_chan_event(
13894         int cmd, struct cfg80211_registered_device *rdev,
13895         struct wireless_dev *wdev, u64 cookie,
13896         struct ieee80211_channel *chan,
13897         unsigned int duration, gfp_t gfp)
13898 {
13899         struct sk_buff *msg;
13900         void *hdr;
13901
13902         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13903         if (!msg)
13904                 return;
13905
13906         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
13907         if (!hdr) {
13908                 nlmsg_free(msg);
13909                 return;
13910         }
13911
13912         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
13913             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
13914                                          wdev->netdev->ifindex)) ||
13915             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
13916                               NL80211_ATTR_PAD) ||
13917             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
13918             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
13919                         NL80211_CHAN_NO_HT) ||
13920             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
13921                               NL80211_ATTR_PAD))
13922                 goto nla_put_failure;
13923
13924         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
13925             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
13926                 goto nla_put_failure;
13927
13928         genlmsg_end(msg, hdr);
13929
13930         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13931                                 NL80211_MCGRP_MLME, gfp);
13932         return;
13933
13934  nla_put_failure:
13935         genlmsg_cancel(msg, hdr);
13936         nlmsg_free(msg);
13937 }
13938
13939 void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
13940                                struct ieee80211_channel *chan,
13941                                unsigned int duration, gfp_t gfp)
13942 {
13943         struct wiphy *wiphy = wdev->wiphy;
13944         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13945
13946         trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
13947         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
13948                                           rdev, wdev, cookie, chan,
13949                                           duration, gfp);
13950 }
13951 EXPORT_SYMBOL(cfg80211_ready_on_channel);
13952
13953 void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
13954                                         struct ieee80211_channel *chan,
13955                                         gfp_t gfp)
13956 {
13957         struct wiphy *wiphy = wdev->wiphy;
13958         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13959
13960         trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
13961         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
13962                                           rdev, wdev, cookie, chan, 0, gfp);
13963 }
13964 EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
13965
13966 void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
13967                       struct station_info *sinfo, gfp_t gfp)
13968 {
13969         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
13970         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13971         struct sk_buff *msg;
13972
13973         trace_cfg80211_new_sta(dev, mac_addr, sinfo);
13974
13975         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
13976         if (!msg)
13977                 return;
13978
13979         if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
13980                                  rdev, dev, mac_addr, sinfo) < 0) {
13981                 nlmsg_free(msg);
13982                 return;
13983         }
13984
13985         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
13986                                 NL80211_MCGRP_MLME, gfp);
13987 }
13988 EXPORT_SYMBOL(cfg80211_new_sta);
13989
13990 void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
13991                             struct station_info *sinfo, gfp_t gfp)
13992 {
13993         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
13994         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
13995         struct sk_buff *msg;
13996         struct station_info empty_sinfo = {};
13997
13998         if (!sinfo)
13999                 sinfo = &empty_sinfo;
14000
14001         trace_cfg80211_del_sta(dev, mac_addr);
14002
14003         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14004         if (!msg)
14005                 return;
14006
14007         if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
14008                                  rdev, dev, mac_addr, sinfo) < 0) {
14009                 nlmsg_free(msg);
14010                 return;
14011         }
14012
14013         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14014                                 NL80211_MCGRP_MLME, gfp);
14015 }
14016 EXPORT_SYMBOL(cfg80211_del_sta_sinfo);
14017
14018 void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
14019                           enum nl80211_connect_failed_reason reason,
14020                           gfp_t gfp)
14021 {
14022         struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
14023         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14024         struct sk_buff *msg;
14025         void *hdr;
14026
14027         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
14028         if (!msg)
14029                 return;
14030
14031         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
14032         if (!hdr) {
14033                 nlmsg_free(msg);
14034                 return;
14035         }
14036
14037         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14038             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
14039             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
14040                 goto nla_put_failure;
14041
14042         genlmsg_end(msg, hdr);
14043
14044         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14045                                 NL80211_MCGRP_MLME, gfp);
14046         return;
14047
14048  nla_put_failure:
14049         genlmsg_cancel(msg, hdr);
14050         nlmsg_free(msg);
14051 }
14052 EXPORT_SYMBOL(cfg80211_conn_failed);
14053
14054 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
14055                                        const u8 *addr, gfp_t gfp)
14056 {
14057         struct wireless_dev *wdev = dev->ieee80211_ptr;
14058         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14059         struct sk_buff *msg;
14060         void *hdr;
14061         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
14062
14063         if (!nlportid)
14064                 return false;
14065
14066         msg = nlmsg_new(100, gfp);
14067         if (!msg)
14068                 return true;
14069
14070         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
14071         if (!hdr) {
14072                 nlmsg_free(msg);
14073                 return true;
14074         }
14075
14076         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14077             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14078             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
14079                 goto nla_put_failure;
14080
14081         genlmsg_end(msg, hdr);
14082         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14083         return true;
14084
14085  nla_put_failure:
14086         genlmsg_cancel(msg, hdr);
14087         nlmsg_free(msg);
14088         return true;
14089 }
14090
14091 bool cfg80211_rx_spurious_frame(struct net_device *dev,
14092                                 const u8 *addr, gfp_t gfp)
14093 {
14094         struct wireless_dev *wdev = dev->ieee80211_ptr;
14095         bool ret;
14096
14097         trace_cfg80211_rx_spurious_frame(dev, addr);
14098
14099         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
14100                     wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
14101                 trace_cfg80211_return_bool(false);
14102                 return false;
14103         }
14104         ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
14105                                          addr, gfp);
14106         trace_cfg80211_return_bool(ret);
14107         return ret;
14108 }
14109 EXPORT_SYMBOL(cfg80211_rx_spurious_frame);
14110
14111 bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
14112                                         const u8 *addr, gfp_t gfp)
14113 {
14114         struct wireless_dev *wdev = dev->ieee80211_ptr;
14115         bool ret;
14116
14117         trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);
14118
14119         if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
14120                     wdev->iftype != NL80211_IFTYPE_P2P_GO &&
14121                     wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
14122                 trace_cfg80211_return_bool(false);
14123                 return false;
14124         }
14125         ret = __nl80211_unexpected_frame(dev,
14126                                          NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
14127                                          addr, gfp);
14128         trace_cfg80211_return_bool(ret);
14129         return ret;
14130 }
14131 EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);
14132
14133 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
14134                       struct wireless_dev *wdev, u32 nlportid,
14135                       int freq, int sig_dbm,
14136                       const u8 *buf, size_t len, u32 flags, gfp_t gfp)
14137 {
14138         struct net_device *netdev = wdev->netdev;
14139         struct sk_buff *msg;
14140         void *hdr;
14141
14142         msg = nlmsg_new(100 + len, gfp);
14143         if (!msg)
14144                 return -ENOMEM;
14145
14146         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
14147         if (!hdr) {
14148                 nlmsg_free(msg);
14149                 return -ENOMEM;
14150         }
14151
14152         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14153             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14154                                         netdev->ifindex)) ||
14155             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14156                               NL80211_ATTR_PAD) ||
14157             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
14158             (sig_dbm &&
14159              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
14160             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
14161             (flags &&
14162              nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, flags)))
14163                 goto nla_put_failure;
14164
14165         genlmsg_end(msg, hdr);
14166
14167         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
14168
14169  nla_put_failure:
14170         genlmsg_cancel(msg, hdr);
14171         nlmsg_free(msg);
14172         return -ENOBUFS;
14173 }
14174
14175 void cfg80211_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie,
14176                              const u8 *buf, size_t len, bool ack, gfp_t gfp)
14177 {
14178         struct wiphy *wiphy = wdev->wiphy;
14179         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14180         struct net_device *netdev = wdev->netdev;
14181         struct sk_buff *msg;
14182         void *hdr;
14183
14184         trace_cfg80211_mgmt_tx_status(wdev, cookie, ack);
14185
14186         msg = nlmsg_new(100 + len, gfp);
14187         if (!msg)
14188                 return;
14189
14190         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
14191         if (!hdr) {
14192                 nlmsg_free(msg);
14193                 return;
14194         }
14195
14196         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14197             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14198                                    netdev->ifindex)) ||
14199             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14200                               NL80211_ATTR_PAD) ||
14201             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
14202             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14203                               NL80211_ATTR_PAD) ||
14204             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
14205                 goto nla_put_failure;
14206
14207         genlmsg_end(msg, hdr);
14208
14209         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14210                                 NL80211_MCGRP_MLME, gfp);
14211         return;
14212
14213  nla_put_failure:
14214         genlmsg_cancel(msg, hdr);
14215         nlmsg_free(msg);
14216 }
14217 EXPORT_SYMBOL(cfg80211_mgmt_tx_status);
14218
14219 static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
14220                                             const char *mac, gfp_t gfp)
14221 {
14222         struct wireless_dev *wdev = dev->ieee80211_ptr;
14223         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14224         struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14225         void **cb;
14226
14227         if (!msg)
14228                 return NULL;
14229
14230         cb = (void **)msg->cb;
14231
14232         cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
14233         if (!cb[0]) {
14234                 nlmsg_free(msg);
14235                 return NULL;
14236         }
14237
14238         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14239             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
14240                 goto nla_put_failure;
14241
14242         if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
14243                 goto nla_put_failure;
14244
14245         cb[1] = nla_nest_start(msg, NL80211_ATTR_CQM);
14246         if (!cb[1])
14247                 goto nla_put_failure;
14248
14249         cb[2] = rdev;
14250
14251         return msg;
14252  nla_put_failure:
14253         nlmsg_free(msg);
14254         return NULL;
14255 }
14256
14257 static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
14258 {
14259         void **cb = (void **)msg->cb;
14260         struct cfg80211_registered_device *rdev = cb[2];
14261
14262         nla_nest_end(msg, cb[1]);
14263         genlmsg_end(msg, cb[0]);
14264
14265         memset(msg->cb, 0, sizeof(msg->cb));
14266
14267         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14268                                 NL80211_MCGRP_MLME, gfp);
14269 }
14270
14271 void cfg80211_cqm_rssi_notify(struct net_device *dev,
14272                               enum nl80211_cqm_rssi_threshold_event rssi_event,
14273                               s32 rssi_level, gfp_t gfp)
14274 {
14275         struct sk_buff *msg;
14276         struct wireless_dev *wdev = dev->ieee80211_ptr;
14277         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14278
14279         trace_cfg80211_cqm_rssi_notify(dev, rssi_event, rssi_level);
14280
14281         if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
14282                     rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
14283                 return;
14284
14285         if (wdev->cqm_config) {
14286                 wdev->cqm_config->last_rssi_event_value = rssi_level;
14287
14288                 cfg80211_cqm_rssi_update(rdev, dev);
14289
14290                 if (rssi_level == 0)
14291                         rssi_level = wdev->cqm_config->last_rssi_event_value;
14292         }
14293
14294         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
14295         if (!msg)
14296                 return;
14297
14298         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
14299                         rssi_event))
14300                 goto nla_put_failure;
14301
14302         if (rssi_level && nla_put_s32(msg, NL80211_ATTR_CQM_RSSI_LEVEL,
14303                                       rssi_level))
14304                 goto nla_put_failure;
14305
14306         cfg80211_send_cqm(msg, gfp);
14307
14308         return;
14309
14310  nla_put_failure:
14311         nlmsg_free(msg);
14312 }
14313 EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
14314
14315 void cfg80211_cqm_txe_notify(struct net_device *dev,
14316                              const u8 *peer, u32 num_packets,
14317                              u32 rate, u32 intvl, gfp_t gfp)
14318 {
14319         struct sk_buff *msg;
14320
14321         msg = cfg80211_prepare_cqm(dev, peer, gfp);
14322         if (!msg)
14323                 return;
14324
14325         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
14326                 goto nla_put_failure;
14327
14328         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
14329                 goto nla_put_failure;
14330
14331         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
14332                 goto nla_put_failure;
14333
14334         cfg80211_send_cqm(msg, gfp);
14335         return;
14336
14337  nla_put_failure:
14338         nlmsg_free(msg);
14339 }
14340 EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
14341
14342 void cfg80211_cqm_pktloss_notify(struct net_device *dev,
14343                                  const u8 *peer, u32 num_packets, gfp_t gfp)
14344 {
14345         struct sk_buff *msg;
14346
14347         trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);
14348
14349         msg = cfg80211_prepare_cqm(dev, peer, gfp);
14350         if (!msg)
14351                 return;
14352
14353         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
14354                 goto nla_put_failure;
14355
14356         cfg80211_send_cqm(msg, gfp);
14357         return;
14358
14359  nla_put_failure:
14360         nlmsg_free(msg);
14361 }
14362 EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
14363
14364 void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
14365 {
14366         struct sk_buff *msg;
14367
14368         msg = cfg80211_prepare_cqm(dev, NULL, gfp);
14369         if (!msg)
14370                 return;
14371
14372         if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
14373                 goto nla_put_failure;
14374
14375         cfg80211_send_cqm(msg, gfp);
14376         return;
14377
14378  nla_put_failure:
14379         nlmsg_free(msg);
14380 }
14381 EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);
14382
14383 static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
14384                                      struct net_device *netdev, const u8 *bssid,
14385                                      const u8 *replay_ctr, gfp_t gfp)
14386 {
14387         struct sk_buff *msg;
14388         struct nlattr *rekey_attr;
14389         void *hdr;
14390
14391         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14392         if (!msg)
14393                 return;
14394
14395         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
14396         if (!hdr) {
14397                 nlmsg_free(msg);
14398                 return;
14399         }
14400
14401         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14402             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14403             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
14404                 goto nla_put_failure;
14405
14406         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
14407         if (!rekey_attr)
14408                 goto nla_put_failure;
14409
14410         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
14411                     NL80211_REPLAY_CTR_LEN, replay_ctr))
14412                 goto nla_put_failure;
14413
14414         nla_nest_end(msg, rekey_attr);
14415
14416         genlmsg_end(msg, hdr);
14417
14418         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14419                                 NL80211_MCGRP_MLME, gfp);
14420         return;
14421
14422  nla_put_failure:
14423         genlmsg_cancel(msg, hdr);
14424         nlmsg_free(msg);
14425 }
14426
14427 void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
14428                                const u8 *replay_ctr, gfp_t gfp)
14429 {
14430         struct wireless_dev *wdev = dev->ieee80211_ptr;
14431         struct wiphy *wiphy = wdev->wiphy;
14432         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14433
14434         trace_cfg80211_gtk_rekey_notify(dev, bssid);
14435         nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
14436 }
14437 EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);
14438
14439 static void
14440 nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
14441                                struct net_device *netdev, int index,
14442                                const u8 *bssid, bool preauth, gfp_t gfp)
14443 {
14444         struct sk_buff *msg;
14445         struct nlattr *attr;
14446         void *hdr;
14447
14448         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14449         if (!msg)
14450                 return;
14451
14452         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
14453         if (!hdr) {
14454                 nlmsg_free(msg);
14455                 return;
14456         }
14457
14458         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14459             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
14460                 goto nla_put_failure;
14461
14462         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
14463         if (!attr)
14464                 goto nla_put_failure;
14465
14466         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
14467             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
14468             (preauth &&
14469              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
14470                 goto nla_put_failure;
14471
14472         nla_nest_end(msg, attr);
14473
14474         genlmsg_end(msg, hdr);
14475
14476         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14477                                 NL80211_MCGRP_MLME, gfp);
14478         return;
14479
14480  nla_put_failure:
14481         genlmsg_cancel(msg, hdr);
14482         nlmsg_free(msg);
14483 }
14484
14485 void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
14486                                      const u8 *bssid, bool preauth, gfp_t gfp)
14487 {
14488         struct wireless_dev *wdev = dev->ieee80211_ptr;
14489         struct wiphy *wiphy = wdev->wiphy;
14490         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14491
14492         trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
14493         nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
14494 }
14495 EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);
14496
14497 static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
14498                                      struct net_device *netdev,
14499                                      struct cfg80211_chan_def *chandef,
14500                                      gfp_t gfp,
14501                                      enum nl80211_commands notif,
14502                                      u8 count)
14503 {
14504         struct sk_buff *msg;
14505         void *hdr;
14506
14507         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14508         if (!msg)
14509                 return;
14510
14511         hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
14512         if (!hdr) {
14513                 nlmsg_free(msg);
14514                 return;
14515         }
14516
14517         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
14518                 goto nla_put_failure;
14519
14520         if (nl80211_send_chandef(msg, chandef))
14521                 goto nla_put_failure;
14522
14523         if ((notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) &&
14524             (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count)))
14525                         goto nla_put_failure;
14526
14527         genlmsg_end(msg, hdr);
14528
14529         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14530                                 NL80211_MCGRP_MLME, gfp);
14531         return;
14532
14533  nla_put_failure:
14534         genlmsg_cancel(msg, hdr);
14535         nlmsg_free(msg);
14536 }
14537
14538 void cfg80211_ch_switch_notify(struct net_device *dev,
14539                                struct cfg80211_chan_def *chandef)
14540 {
14541         struct wireless_dev *wdev = dev->ieee80211_ptr;
14542         struct wiphy *wiphy = wdev->wiphy;
14543         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14544
14545         ASSERT_WDEV_LOCK(wdev);
14546
14547         trace_cfg80211_ch_switch_notify(dev, chandef);
14548
14549         wdev->chandef = *chandef;
14550         wdev->preset_chandef = *chandef;
14551         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
14552                                  NL80211_CMD_CH_SWITCH_NOTIFY, 0);
14553 }
14554 EXPORT_SYMBOL(cfg80211_ch_switch_notify);
14555
14556 void cfg80211_ch_switch_started_notify(struct net_device *dev,
14557                                        struct cfg80211_chan_def *chandef,
14558                                        u8 count)
14559 {
14560         struct wireless_dev *wdev = dev->ieee80211_ptr;
14561         struct wiphy *wiphy = wdev->wiphy;
14562         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14563
14564         trace_cfg80211_ch_switch_started_notify(dev, chandef);
14565
14566         nl80211_ch_switch_notify(rdev, dev, chandef, GFP_KERNEL,
14567                                  NL80211_CMD_CH_SWITCH_STARTED_NOTIFY, count);
14568 }
14569 EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);
14570
14571 void
14572 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
14573                      const struct cfg80211_chan_def *chandef,
14574                      enum nl80211_radar_event event,
14575                      struct net_device *netdev, gfp_t gfp)
14576 {
14577         struct sk_buff *msg;
14578         void *hdr;
14579
14580         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14581         if (!msg)
14582                 return;
14583
14584         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
14585         if (!hdr) {
14586                 nlmsg_free(msg);
14587                 return;
14588         }
14589
14590         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
14591                 goto nla_put_failure;
14592
14593         /* NOP and radar events don't need a netdev parameter */
14594         if (netdev) {
14595                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
14596
14597                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
14598                     nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14599                                       NL80211_ATTR_PAD))
14600                         goto nla_put_failure;
14601         }
14602
14603         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
14604                 goto nla_put_failure;
14605
14606         if (nl80211_send_chandef(msg, chandef))
14607                 goto nla_put_failure;
14608
14609         genlmsg_end(msg, hdr);
14610
14611         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14612                                 NL80211_MCGRP_MLME, gfp);
14613         return;
14614
14615  nla_put_failure:
14616         genlmsg_cancel(msg, hdr);
14617         nlmsg_free(msg);
14618 }
14619
14620 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
14621                            u64 cookie, bool acked, gfp_t gfp)
14622 {
14623         struct wireless_dev *wdev = dev->ieee80211_ptr;
14624         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14625         struct sk_buff *msg;
14626         void *hdr;
14627
14628         trace_cfg80211_probe_status(dev, addr, cookie, acked);
14629
14630         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14631
14632         if (!msg)
14633                 return;
14634
14635         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
14636         if (!hdr) {
14637                 nlmsg_free(msg);
14638                 return;
14639         }
14640
14641         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14642             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14643             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
14644             nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
14645                               NL80211_ATTR_PAD) ||
14646             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
14647                 goto nla_put_failure;
14648
14649         genlmsg_end(msg, hdr);
14650
14651         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14652                                 NL80211_MCGRP_MLME, gfp);
14653         return;
14654
14655  nla_put_failure:
14656         genlmsg_cancel(msg, hdr);
14657         nlmsg_free(msg);
14658 }
14659 EXPORT_SYMBOL(cfg80211_probe_status);
14660
14661 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
14662                                  const u8 *frame, size_t len,
14663                                  int freq, int sig_dbm)
14664 {
14665         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14666         struct sk_buff *msg;
14667         void *hdr;
14668         struct cfg80211_beacon_registration *reg;
14669
14670         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
14671
14672         spin_lock_bh(&rdev->beacon_registrations_lock);
14673         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
14674                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
14675                 if (!msg) {
14676                         spin_unlock_bh(&rdev->beacon_registrations_lock);
14677                         return;
14678                 }
14679
14680                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
14681                 if (!hdr)
14682                         goto nla_put_failure;
14683
14684                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14685                     (freq &&
14686                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
14687                     (sig_dbm &&
14688                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
14689                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
14690                         goto nla_put_failure;
14691
14692                 genlmsg_end(msg, hdr);
14693
14694                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
14695         }
14696         spin_unlock_bh(&rdev->beacon_registrations_lock);
14697         return;
14698
14699  nla_put_failure:
14700         spin_unlock_bh(&rdev->beacon_registrations_lock);
14701         if (hdr)
14702                 genlmsg_cancel(msg, hdr);
14703         nlmsg_free(msg);
14704 }
14705 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
14706
14707 #ifdef CONFIG_PM
14708 static int cfg80211_net_detect_results(struct sk_buff *msg,
14709                                        struct cfg80211_wowlan_wakeup *wakeup)
14710 {
14711         struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
14712         struct nlattr *nl_results, *nl_match, *nl_freqs;
14713         int i, j;
14714
14715         nl_results = nla_nest_start(
14716                 msg, NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
14717         if (!nl_results)
14718                 return -EMSGSIZE;
14719
14720         for (i = 0; i < nd->n_matches; i++) {
14721                 struct cfg80211_wowlan_nd_match *match = nd->matches[i];
14722
14723                 nl_match = nla_nest_start(msg, i);
14724                 if (!nl_match)
14725                         break;
14726
14727                 /* The SSID attribute is optional in nl80211, but for
14728                  * simplicity reasons it's always present in the
14729                  * cfg80211 structure.  If a driver can't pass the
14730                  * SSID, that needs to be changed.  A zero length SSID
14731                  * is still a valid SSID (wildcard), so it cannot be
14732                  * used for this purpose.
14733                  */
14734                 if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
14735                             match->ssid.ssid)) {
14736                         nla_nest_cancel(msg, nl_match);
14737                         goto out;
14738                 }
14739
14740                 if (match->n_channels) {
14741                         nl_freqs = nla_nest_start(
14742                                 msg, NL80211_ATTR_SCAN_FREQUENCIES);
14743                         if (!nl_freqs) {
14744                                 nla_nest_cancel(msg, nl_match);
14745                                 goto out;
14746                         }
14747
14748                         for (j = 0; j < match->n_channels; j++) {
14749                                 if (nla_put_u32(msg, j, match->channels[j])) {
14750                                         nla_nest_cancel(msg, nl_freqs);
14751                                         nla_nest_cancel(msg, nl_match);
14752                                         goto out;
14753                                 }
14754                         }
14755
14756                         nla_nest_end(msg, nl_freqs);
14757                 }
14758
14759                 nla_nest_end(msg, nl_match);
14760         }
14761
14762 out:
14763         nla_nest_end(msg, nl_results);
14764         return 0;
14765 }
14766
14767 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
14768                                    struct cfg80211_wowlan_wakeup *wakeup,
14769                                    gfp_t gfp)
14770 {
14771         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14772         struct sk_buff *msg;
14773         void *hdr;
14774         int size = 200;
14775
14776         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
14777
14778         if (wakeup)
14779                 size += wakeup->packet_present_len;
14780
14781         msg = nlmsg_new(size, gfp);
14782         if (!msg)
14783                 return;
14784
14785         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
14786         if (!hdr)
14787                 goto free_msg;
14788
14789         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14790             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
14791                               NL80211_ATTR_PAD))
14792                 goto free_msg;
14793
14794         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
14795                                         wdev->netdev->ifindex))
14796                 goto free_msg;
14797
14798         if (wakeup) {
14799                 struct nlattr *reasons;
14800
14801                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
14802                 if (!reasons)
14803                         goto free_msg;
14804
14805                 if (wakeup->disconnect &&
14806                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
14807                         goto free_msg;
14808                 if (wakeup->magic_pkt &&
14809                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
14810                         goto free_msg;
14811                 if (wakeup->gtk_rekey_failure &&
14812                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
14813                         goto free_msg;
14814                 if (wakeup->eap_identity_req &&
14815                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
14816                         goto free_msg;
14817                 if (wakeup->four_way_handshake &&
14818                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
14819                         goto free_msg;
14820                 if (wakeup->rfkill_release &&
14821                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
14822                         goto free_msg;
14823
14824                 if (wakeup->pattern_idx >= 0 &&
14825                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
14826                                 wakeup->pattern_idx))
14827                         goto free_msg;
14828
14829                 if (wakeup->tcp_match &&
14830                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
14831                         goto free_msg;
14832
14833                 if (wakeup->tcp_connlost &&
14834                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
14835                         goto free_msg;
14836
14837                 if (wakeup->tcp_nomoretokens &&
14838                     nla_put_flag(msg,
14839                                  NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
14840                         goto free_msg;
14841
14842                 if (wakeup->packet) {
14843                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
14844                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
14845
14846                         if (!wakeup->packet_80211) {
14847                                 pkt_attr =
14848                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
14849                                 len_attr =
14850                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
14851                         }
14852
14853                         if (wakeup->packet_len &&
14854                             nla_put_u32(msg, len_attr, wakeup->packet_len))
14855                                 goto free_msg;
14856
14857                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
14858                                     wakeup->packet))
14859                                 goto free_msg;
14860                 }
14861
14862                 if (wakeup->net_detect &&
14863                     cfg80211_net_detect_results(msg, wakeup))
14864                                 goto free_msg;
14865
14866                 nla_nest_end(msg, reasons);
14867         }
14868
14869         genlmsg_end(msg, hdr);
14870
14871         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14872                                 NL80211_MCGRP_MLME, gfp);
14873         return;
14874
14875  free_msg:
14876         nlmsg_free(msg);
14877 }
14878 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
14879 #endif
14880
14881 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
14882                                 enum nl80211_tdls_operation oper,
14883                                 u16 reason_code, gfp_t gfp)
14884 {
14885         struct wireless_dev *wdev = dev->ieee80211_ptr;
14886         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
14887         struct sk_buff *msg;
14888         void *hdr;
14889
14890         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
14891                                          reason_code);
14892
14893         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
14894         if (!msg)
14895                 return;
14896
14897         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
14898         if (!hdr) {
14899                 nlmsg_free(msg);
14900                 return;
14901         }
14902
14903         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
14904             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
14905             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
14906             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
14907             (reason_code > 0 &&
14908              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
14909                 goto nla_put_failure;
14910
14911         genlmsg_end(msg, hdr);
14912
14913         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
14914                                 NL80211_MCGRP_MLME, gfp);
14915         return;
14916
14917  nla_put_failure:
14918         genlmsg_cancel(msg, hdr);
14919         nlmsg_free(msg);
14920 }
14921 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
14922
14923 static int nl80211_netlink_notify(struct notifier_block * nb,
14924                                   unsigned long state,
14925                                   void *_notify)
14926 {
14927         struct netlink_notify *notify = _notify;
14928         struct cfg80211_registered_device *rdev;
14929         struct wireless_dev *wdev;
14930         struct cfg80211_beacon_registration *reg, *tmp;
14931
14932         if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
14933                 return NOTIFY_DONE;
14934
14935         rcu_read_lock();
14936
14937         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
14938                 struct cfg80211_sched_scan_request *sched_scan_req;
14939
14940                 list_for_each_entry_rcu(sched_scan_req,
14941                                         &rdev->sched_scan_req_list,
14942                                         list) {
14943                         if (sched_scan_req->owner_nlportid == notify->portid) {
14944                                 sched_scan_req->nl_owner_dead = true;
14945                                 schedule_work(&rdev->sched_scan_stop_wk);
14946                         }
14947                 }
14948
14949                 list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
14950                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
14951
14952                         if (wdev->owner_nlportid == notify->portid) {
14953                                 wdev->nl_owner_dead = true;
14954                                 schedule_work(&rdev->destroy_work);
14955                         } else if (wdev->conn_owner_nlportid == notify->portid) {
14956                                 schedule_work(&wdev->disconnect_wk);
14957                         }
14958                 }
14959
14960                 spin_lock_bh(&rdev->beacon_registrations_lock);
14961                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
14962                                          list) {
14963                         if (reg->nlportid == notify->portid) {
14964                                 list_del(&reg->list);
14965                                 kfree(reg);
14966                                 break;
14967                         }
14968                 }
14969                 spin_unlock_bh(&rdev->beacon_registrations_lock);
14970         }
14971
14972         rcu_read_unlock();
14973
14974         /*
14975          * It is possible that the user space process that is controlling the
14976          * indoor setting disappeared, so notify the regulatory core.
14977          */
14978         regulatory_netlink_notify(notify->portid);
14979         return NOTIFY_OK;
14980 }
14981
14982 static struct notifier_block nl80211_netlink_notifier = {
14983         .notifier_call = nl80211_netlink_notify,
14984 };
14985
14986 void cfg80211_ft_event(struct net_device *netdev,
14987                        struct cfg80211_ft_event_params *ft_event)
14988 {
14989         struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
14990         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
14991         struct sk_buff *msg;
14992         void *hdr;
14993
14994         trace_cfg80211_ft_event(wiphy, netdev, ft_event);
14995
14996         if (!ft_event->target_ap)
14997                 return;
14998
14999         msg = nlmsg_new(100 + ft_event->ric_ies_len, GFP_KERNEL);
15000         if (!msg)
15001                 return;
15002
15003         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
15004         if (!hdr)
15005                 goto out;
15006
15007         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15008             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
15009             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
15010                 goto out;
15011
15012         if (ft_event->ies &&
15013             nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
15014                 goto out;
15015         if (ft_event->ric_ies &&
15016             nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
15017                     ft_event->ric_ies))
15018                 goto out;
15019
15020         genlmsg_end(msg, hdr);
15021
15022         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
15023                                 NL80211_MCGRP_MLME, GFP_KERNEL);
15024         return;
15025  out:
15026         nlmsg_free(msg);
15027 }
15028 EXPORT_SYMBOL(cfg80211_ft_event);
15029
15030 void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
15031 {
15032         struct cfg80211_registered_device *rdev;
15033         struct sk_buff *msg;
15034         void *hdr;
15035         u32 nlportid;
15036
15037         rdev = wiphy_to_rdev(wdev->wiphy);
15038         if (!rdev->crit_proto_nlportid)
15039                 return;
15040
15041         nlportid = rdev->crit_proto_nlportid;
15042         rdev->crit_proto_nlportid = 0;
15043
15044         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
15045         if (!msg)
15046                 return;
15047
15048         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
15049         if (!hdr)
15050                 goto nla_put_failure;
15051
15052         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15053             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15054                               NL80211_ATTR_PAD))
15055                 goto nla_put_failure;
15056
15057         genlmsg_end(msg, hdr);
15058
15059         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
15060         return;
15061
15062  nla_put_failure:
15063         if (hdr)
15064                 genlmsg_cancel(msg, hdr);
15065         nlmsg_free(msg);
15066 }
15067 EXPORT_SYMBOL(cfg80211_crit_proto_stopped);
15068
15069 void nl80211_send_ap_stopped(struct wireless_dev *wdev)
15070 {
15071         struct wiphy *wiphy = wdev->wiphy;
15072         struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
15073         struct sk_buff *msg;
15074         void *hdr;
15075
15076         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
15077         if (!msg)
15078                 return;
15079
15080         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
15081         if (!hdr)
15082                 goto out;
15083
15084         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
15085             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
15086             nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
15087                               NL80211_ATTR_PAD))
15088                 goto out;
15089
15090         genlmsg_end(msg, hdr);
15091
15092         genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
15093                                 NL80211_MCGRP_MLME, GFP_KERNEL);
15094         return;
15095  out:
15096         nlmsg_free(msg);
15097 }
15098
15099 /* initialisation/exit functions */
15100
15101 int __init nl80211_init(void)
15102 {
15103         int err;
15104
15105         err = genl_register_family(&nl80211_fam);
15106         if (err)
15107                 return err;
15108
15109         err = netlink_register_notifier(&nl80211_netlink_notifier);
15110         if (err)
15111                 goto err_out;
15112
15113         return 0;
15114  err_out:
15115         genl_unregister_family(&nl80211_fam);
15116         return err;
15117 }
15118
15119 void nl80211_exit(void)
15120 {
15121         netlink_unregister_notifier(&nl80211_netlink_notifier);
15122         genl_unregister_family(&nl80211_fam);
15123 }