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  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include <net/inet_connection_sock.h>
  23 #include "core.h"
  24 #include "nl80211.h"
  25 #include "reg.h"
  26 #include "rdev-ops.h"
  27
  28 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  29                                    struct genl_info *info,
  30                                    struct cfg80211_crypto_settings *settings,
  31                                    int cipher_limit);
  32
  33 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  34                             struct genl_info *info);
  35 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  36                               struct genl_info *info);
  37
  38 /* the netlink family */
  39 static struct genl_family nl80211_fam = {
  40         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  41         .name = "nl80211",      /* have users key off the name instead */
  42         .hdrsize = 0,           /* no private header */
  43         .version = 1,           /* no particular meaning now */
  44         .maxattr = NL80211_ATTR_MAX,
  45         .netnsok = true,
  46         .pre_doit = nl80211_pre_doit,
  47         .post_doit = nl80211_post_doit,
  48 };
  49
  50 /* returns ERR_PTR values */
  51 static struct wireless_dev *
  52 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  53 {
  54         struct cfg80211_registered_device *rdev;
  55         struct wireless_dev *result = NULL;
  56         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  57         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  58         u64 wdev_id;
  59         int wiphy_idx = -1;
  60         int ifidx = -1;
  61
  62         assert_cfg80211_lock();
  63
  64         if (!have_ifidx && !have_wdev_id)
  65                 return ERR_PTR(-EINVAL);
  66
  67         if (have_ifidx)
  68                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  69         if (have_wdev_id) {
  70                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  71                 wiphy_idx = wdev_id >> 32;
  72         }
  73
  74         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  75                 struct wireless_dev *wdev;
  76
  77                 if (wiphy_net(&rdev->wiphy) != netns)
  78                         continue;
  79
  80                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  81                         continue;
  82
  83                 mutex_lock(&rdev->devlist_mtx);
  84                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  85                         if (have_ifidx && wdev->netdev &&
  86                             wdev->netdev->ifindex == ifidx) {
  87                                 result = wdev;
  88                                 break;
  89                         }
  90                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  91                                 result = wdev;
  92                                 break;
  93                         }
  94                 }
  95                 mutex_unlock(&rdev->devlist_mtx);
  96
  97                 if (result)
  98                         break;
  99         }
 100
 101         if (result)
 102                 return result;
 103         return ERR_PTR(-ENODEV);
 104 }
 105
 106 static struct cfg80211_registered_device *
 107 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 108 {
 109         struct cfg80211_registered_device *rdev = NULL, *tmp;
 110         struct net_device *netdev;
 111
 112         assert_cfg80211_lock();
 113
 114         if (!attrs[NL80211_ATTR_WIPHY] &&
 115             !attrs[NL80211_ATTR_IFINDEX] &&
 116             !attrs[NL80211_ATTR_WDEV])
 117                 return ERR_PTR(-EINVAL);
 118
 119         if (attrs[NL80211_ATTR_WIPHY])
 120                 rdev = cfg80211_rdev_by_wiphy_idx(
 121                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 122
 123         if (attrs[NL80211_ATTR_WDEV]) {
 124                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 125                 struct wireless_dev *wdev;
 126                 bool found = false;
 127
 128                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 129                 if (tmp) {
 130                         /* make sure wdev exists */
 131                         mutex_lock(&tmp->devlist_mtx);
 132                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 133                                 if (wdev->identifier != (u32)wdev_id)
 134                                         continue;
 135                                 found = true;
 136                                 break;
 137                         }
 138                         mutex_unlock(&tmp->devlist_mtx);
 139
 140                         if (!found)
 141                                 tmp = NULL;
 142
 143                         if (rdev && tmp != rdev)
 144                                 return ERR_PTR(-EINVAL);
 145                         rdev = tmp;
 146                 }
 147         }
 148
 149         if (attrs[NL80211_ATTR_IFINDEX]) {
 150                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 151                 netdev = dev_get_by_index(netns, ifindex);
 152                 if (netdev) {
 153                         if (netdev->ieee80211_ptr)
 154                                 tmp = wiphy_to_dev(
 155                                                 netdev->ieee80211_ptr->wiphy);
 156                         else
 157                                 tmp = NULL;
 158
 159                         dev_put(netdev);
 160
 161                         /* not wireless device -- return error */
 162                         if (!tmp)
 163                                 return ERR_PTR(-EINVAL);
 164
 165                         /* mismatch -- return error */
 166                         if (rdev && tmp != rdev)
 167                                 return ERR_PTR(-EINVAL);
 168
 169                         rdev = tmp;
 170                 }
 171         }
 172
 173         if (!rdev)
 174                 return ERR_PTR(-ENODEV);
 175
 176         if (netns != wiphy_net(&rdev->wiphy))
 177                 return ERR_PTR(-ENODEV);
 178
 179         return rdev;
 180 }
 181
 182 /*
 183  * This function returns a pointer to the driver
 184  * that the genl_info item that is passed refers to.
 185  * If successful, it returns non-NULL and also locks
 186  * the driver's mutex!
 187  *
 188  * This means that you need to call cfg80211_unlock_rdev()
 189  * before being allowed to acquire &cfg80211_mutex!
 190  *
 191  * This is necessary because we need to lock the global
 192  * mutex to get an item off the list safely, and then
 193  * we lock the rdev mutex so it doesn't go away under us.
 194  *
 195  * We don't want to keep cfg80211_mutex locked
 196  * for all the time in order to allow requests on
 197  * other interfaces to go through at the same time.
 198  *
 199  * The result of this can be a PTR_ERR and hence must
 200  * be checked with IS_ERR() for errors.
 201  */
 202 static struct cfg80211_registered_device *
 203 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 204 {
 205         struct cfg80211_registered_device *rdev;
 206
 207         mutex_lock(&cfg80211_mutex);
 208         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 209
 210         /* if it is not an error we grab the lock on
 211          * it to assure it won't be going away while
 212          * we operate on it */
 213         if (!IS_ERR(rdev))
 214                 mutex_lock(&rdev->mtx);
 215
 216         mutex_unlock(&cfg80211_mutex);
 217
 218         return rdev;
 219 }
 220
 221 /* policy for the attributes */
 222 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 223         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 224         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 225                                       .len = 20-1 },
 226         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 227
 228         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 229         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 232         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 233
 234         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 236         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 238         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 239
 240         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 242         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 243
 244         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 245         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 246
 247         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 248         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 249                                     .len = WLAN_MAX_KEY_LEN },
 250         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 251         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 252         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 253         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 254         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 255
 256         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 257         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 258         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 259                                        .len = IEEE80211_MAX_DATA_LEN },
 260         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 261                                        .len = IEEE80211_MAX_DATA_LEN },
 262         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 263         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 264         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 265         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 266                                                .len = NL80211_MAX_SUPP_RATES },
 267         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 268         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 269         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 270         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 271                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 272         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 273
 274         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 275         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 276
 277         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 280         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 281                                            .len = NL80211_MAX_SUPP_RATES },
 282         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 283
 284         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 285         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 286
 287         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 288
 289         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 290         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 291                               .len = IEEE80211_MAX_DATA_LEN },
 292         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 293         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 294
 295         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 296                                 .len = IEEE80211_MAX_SSID_LEN },
 297         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 298         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 299         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 301         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 302         [NL80211_ATTR_STA_FLAGS2] = {
 303                 .len = sizeof(struct nl80211_sta_flag_update),
 304         },
 305         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 306         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 307         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 309         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 310         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 311         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 312         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 313         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 314                                  .len = WLAN_PMKID_LEN },
 315         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 316         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 317         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 318         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 319                                  .len = IEEE80211_MAX_DATA_LEN },
 320         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 321         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 322         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 323         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 324         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 326         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 327         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 330         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 331         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 332         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 334         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 335         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 336         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 338         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 339         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 340                                          .len = IEEE80211_MAX_DATA_LEN },
 341         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 342                                          .len = IEEE80211_MAX_DATA_LEN },
 343         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 345         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 352         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 353                                       .len = IEEE80211_MAX_DATA_LEN },
 354         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 355         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 356         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 357                 .len = NL80211_HT_CAPABILITY_LEN
 358         },
 359         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 360         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 361         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 362         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 363         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 364         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 365         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 366         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 367         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 368         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 369         [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
 370         [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
 371         [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
 372         [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
 373         [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
 374 };
 375
 376 /* policy for the key attributes */
 377 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 378         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 379         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 380         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 381         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 382         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 383         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 384         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 385         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 386 };
 387
 388 /* policy for the key default flags */
 389 static const struct nla_policy
 390 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 391         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 392         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 393 };
 394
 395 /* policy for WoWLAN attributes */
 396 static const struct nla_policy
 397 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 398         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 400         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 401         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 402         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 403         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 404         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 405         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 406         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 407 };
 408
 409 static const struct nla_policy
 410 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 411         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 412         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 413         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 414         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 415         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 416         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 417         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 418                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 419         },
 420         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 421                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 422         },
 423         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 424         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 425         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 426 };
 427
 428 /* policy for GTK rekey offload attributes */
 429 static const struct nla_policy
 430 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 431         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 432         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 433         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 434 };
 435
 436 static const struct nla_policy
 437 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 438         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 439                                                  .len = IEEE80211_MAX_SSID_LEN },
 440         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 441 };
 442
 443 /* ifidx get helper */
 444 static int nl80211_get_ifidx(struct netlink_callback *cb)
 445 {
 446         int res;
 447
 448         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 449                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 450                           nl80211_policy);
 451         if (res)
 452                 return res;
 453
 454         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 455                 return -EINVAL;
 456
 457         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 458         if (!res)
 459                 return -EINVAL;
 460         return res;
 461 }
 462
 463 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 464                                        struct netlink_callback *cb,
 465                                        struct cfg80211_registered_device **rdev,
 466                                        struct net_device **dev)
 467 {
 468         int ifidx = cb->args[0];
 469         int err;
 470
 471         if (!ifidx)
 472                 ifidx = nl80211_get_ifidx(cb);
 473         if (ifidx < 0)
 474                 return ifidx;
 475
 476         cb->args[0] = ifidx;
 477
 478         rtnl_lock();
 479
 480         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 481         if (!*dev) {
 482                 err = -ENODEV;
 483                 goto out_rtnl;
 484         }
 485
 486         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 487         if (IS_ERR(*rdev)) {
 488                 err = PTR_ERR(*rdev);
 489                 goto out_rtnl;
 490         }
 491
 492         return 0;
 493  out_rtnl:
 494         rtnl_unlock();
 495         return err;
 496 }
 497
 498 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 499 {
 500         cfg80211_unlock_rdev(rdev);
 501         rtnl_unlock();
 502 }
 503
 504 /* IE validation */
 505 static bool is_valid_ie_attr(const struct nlattr *attr)
 506 {
 507         const u8 *pos;
 508         int len;
 509
 510         if (!attr)
 511                 return true;
 512
 513         pos = nla_data(attr);
 514         len = nla_len(attr);
 515
 516         while (len) {
 517                 u8 elemlen;
 518
 519                 if (len < 2)
 520                         return false;
 521                 len -= 2;
 522
 523                 elemlen = pos[1];
 524                 if (elemlen > len)
 525                         return false;
 526
 527                 len -= elemlen;
 528                 pos += 2 + elemlen;
 529         }
 530
 531         return true;
 532 }
 533
 534 /* message building helper */
 535 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 536                                    int flags, u8 cmd)
 537 {
 538         /* since there is no private header just add the generic one */
 539         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 540 }
 541
 542 static int nl80211_msg_put_channel(struct sk_buff *msg,
 543                                    struct ieee80211_channel *chan,
 544                                    bool large)
 545 {
 546         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 547                         chan->center_freq))
 548                 goto nla_put_failure;
 549
 550         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 551             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 552                 goto nla_put_failure;
 553         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 554             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 555                 goto nla_put_failure;
 556         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 557             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 558                 goto nla_put_failure;
 559         if (chan->flags & IEEE80211_CHAN_RADAR) {
 560                 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 561                         goto nla_put_failure;
 562                 if (large) {
 563                         u32 time;
 564
 565                         time = elapsed_jiffies_msecs(chan->dfs_state_entered);
 566
 567                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
 568                                         chan->dfs_state))
 569                                 goto nla_put_failure;
 570                         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
 571                                         time))
 572                                 goto nla_put_failure;
 573                 }
 574         }
 575
 576         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 577                         DBM_TO_MBM(chan->max_power)))
 578                 goto nla_put_failure;
 579
 580         return 0;
 581
 582  nla_put_failure:
 583         return -ENOBUFS;
 584 }
 585
 586 /* netlink command implementations */
 587
 588 struct key_parse {
 589         struct key_params p;
 590         int idx;
 591         int type;
 592         bool def, defmgmt;
 593         bool def_uni, def_multi;
 594 };
 595
 596 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 597 {
 598         struct nlattr *tb[NL80211_KEY_MAX + 1];
 599         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 600                                    nl80211_key_policy);
 601         if (err)
 602                 return err;
 603
 604         k->def = !!tb[NL80211_KEY_DEFAULT];
 605         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 606
 607         if (k->def) {
 608                 k->def_uni = true;
 609                 k->def_multi = true;
 610         }
 611         if (k->defmgmt)
 612                 k->def_multi = true;
 613
 614         if (tb[NL80211_KEY_IDX])
 615                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 616
 617         if (tb[NL80211_KEY_DATA]) {
 618                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 619                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 620         }
 621
 622         if (tb[NL80211_KEY_SEQ]) {
 623                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 624                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 625         }
 626
 627         if (tb[NL80211_KEY_CIPHER])
 628                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 629
 630         if (tb[NL80211_KEY_TYPE]) {
 631                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 632                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 633                         return -EINVAL;
 634         }
 635
 636         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 637                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 638                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 639                                        tb[NL80211_KEY_DEFAULT_TYPES],
 640                                        nl80211_key_default_policy);
 641                 if (err)
 642                         return err;
 643
 644                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 645                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 646         }
 647
 648         return 0;
 649 }
 650
 651 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 652 {
 653         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 654                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 655                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 656         }
 657
 658         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 659                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 660                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 661         }
 662
 663         if (info->attrs[NL80211_ATTR_KEY_IDX])
 664                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 665
 666         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 667                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 668
 669         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 670         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 671
 672         if (k->def) {
 673                 k->def_uni = true;
 674                 k->def_multi = true;
 675         }
 676         if (k->defmgmt)
 677                 k->def_multi = true;
 678
 679         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 680                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 681                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 682                         return -EINVAL;
 683         }
 684
 685         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 686                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 687                 int err = nla_parse_nested(
 688                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 689                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 690                                 nl80211_key_default_policy);
 691                 if (err)
 692                         return err;
 693
 694                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 695                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 696         }
 697
 698         return 0;
 699 }
 700
 701 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 702 {
 703         int err;
 704
 705         memset(k, 0, sizeof(*k));
 706         k->idx = -1;
 707         k->type = -1;
 708
 709         if (info->attrs[NL80211_ATTR_KEY])
 710                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 711         else
 712                 err = nl80211_parse_key_old(info, k);
 713
 714         if (err)
 715                 return err;
 716
 717         if (k->def && k->defmgmt)
 718                 return -EINVAL;
 719
 720         if (k->defmgmt) {
 721                 if (k->def_uni || !k->def_multi)
 722                         return -EINVAL;
 723         }
 724
 725         if (k->idx != -1) {
 726                 if (k->defmgmt) {
 727                         if (k->idx < 4 || k->idx > 5)
 728                                 return -EINVAL;
 729                 } else if (k->def) {
 730                         if (k->idx < 0 || k->idx > 3)
 731                                 return -EINVAL;
 732                 } else {
 733                         if (k->idx < 0 || k->idx > 5)
 734                                 return -EINVAL;
 735                 }
 736         }
 737
 738         return 0;
 739 }
 740
 741 static struct cfg80211_cached_keys *
 742 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 743                        struct nlattr *keys, bool *no_ht)
 744 {
 745         struct key_parse parse;
 746         struct nlattr *key;
 747         struct cfg80211_cached_keys *result;
 748         int rem, err, def = 0;
 749
 750         result = kzalloc(sizeof(*result), GFP_KERNEL);
 751         if (!result)
 752                 return ERR_PTR(-ENOMEM);
 753
 754         result->def = -1;
 755         result->defmgmt = -1;
 756
 757         nla_for_each_nested(key, keys, rem) {
 758                 memset(&parse, 0, sizeof(parse));
 759                 parse.idx = -1;
 760
 761                 err = nl80211_parse_key_new(key, &parse);
 762                 if (err)
 763                         goto error;
 764                 err = -EINVAL;
 765                 if (!parse.p.key)
 766                         goto error;
 767                 if (parse.idx < 0 || parse.idx > 4)
 768                         goto error;
 769                 if (parse.def) {
 770                         if (def)
 771                                 goto error;
 772                         def = 1;
 773                         result->def = parse.idx;
 774                         if (!parse.def_uni || !parse.def_multi)
 775                                 goto error;
 776                 } else if (parse.defmgmt)
 777                         goto error;
 778                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 779                                                      parse.idx, false, NULL);
 780                 if (err)
 781                         goto error;
 782                 result->params[parse.idx].cipher = parse.p.cipher;
 783                 result->params[parse.idx].key_len = parse.p.key_len;
 784                 result->params[parse.idx].key = result->data[parse.idx];
 785                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 786
 787                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 788                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 789                         if (no_ht)
 790                                 *no_ht = true;
 791                 }
 792         }
 793
 794         return result;
 795  error:
 796         kfree(result);
 797         return ERR_PTR(err);
 798 }
 799
 800 static int nl80211_key_allowed(struct wireless_dev *wdev)
 801 {
 802         ASSERT_WDEV_LOCK(wdev);
 803
 804         switch (wdev->iftype) {
 805         case NL80211_IFTYPE_AP:
 806         case NL80211_IFTYPE_AP_VLAN:
 807         case NL80211_IFTYPE_P2P_GO:
 808         case NL80211_IFTYPE_MESH_POINT:
 809                 break;
 810         case NL80211_IFTYPE_ADHOC:
 811                 if (!wdev->current_bss)
 812                         return -ENOLINK;
 813                 break;
 814         case NL80211_IFTYPE_STATION:
 815         case NL80211_IFTYPE_P2P_CLIENT:
 816                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 817                         return -ENOLINK;
 818                 break;
 819         default:
 820                 return -EINVAL;
 821         }
 822
 823         return 0;
 824 }
 825
 826 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 827 {
 828         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 829         int i;
 830
 831         if (!nl_modes)
 832                 goto nla_put_failure;
 833
 834         i = 0;
 835         while (ifmodes) {
 836                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 837                         goto nla_put_failure;
 838                 ifmodes >>= 1;
 839                 i++;
 840         }
 841
 842         nla_nest_end(msg, nl_modes);
 843         return 0;
 844
 845 nla_put_failure:
 846         return -ENOBUFS;
 847 }
 848
 849 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 850                                           struct sk_buff *msg,
 851                                           bool large)
 852 {
 853         struct nlattr *nl_combis;
 854         int i, j;
 855
 856         nl_combis = nla_nest_start(msg,
 857                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 858         if (!nl_combis)
 859                 goto nla_put_failure;
 860
 861         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 862                 const struct ieee80211_iface_combination *c;
 863                 struct nlattr *nl_combi, *nl_limits;
 864
 865                 c = &wiphy->iface_combinations[i];
 866
 867                 nl_combi = nla_nest_start(msg, i + 1);
 868                 if (!nl_combi)
 869                         goto nla_put_failure;
 870
 871                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 872                 if (!nl_limits)
 873                         goto nla_put_failure;
 874
 875                 for (j = 0; j < c->n_limits; j++) {
 876                         struct nlattr *nl_limit;
 877
 878                         nl_limit = nla_nest_start(msg, j + 1);
 879                         if (!nl_limit)
 880                                 goto nla_put_failure;
 881                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 882                                         c->limits[j].max))
 883                                 goto nla_put_failure;
 884                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 885                                                 c->limits[j].types))
 886                                 goto nla_put_failure;
 887                         nla_nest_end(msg, nl_limit);
 888                 }
 889
 890                 nla_nest_end(msg, nl_limits);
 891
 892                 if (c->beacon_int_infra_match &&
 893                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 894                         goto nla_put_failure;
 895                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 896                                 c->num_different_channels) ||
 897                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 898                                 c->max_interfaces))
 899                         goto nla_put_failure;
 900                 if (large &&
 901                     nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
 902                                 c->radar_detect_widths))
 903                         goto nla_put_failure;
 904
 905                 nla_nest_end(msg, nl_combi);
 906         }
 907
 908         nla_nest_end(msg, nl_combis);
 909
 910         return 0;
 911 nla_put_failure:
 912         return -ENOBUFS;
 913 }
 914
 915 #ifdef CONFIG_PM
 916 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
 917                                         struct sk_buff *msg)
 918 {
 919         const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
 920         struct nlattr *nl_tcp;
 921
 922         if (!tcp)
 923                 return 0;
 924
 925         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
 926         if (!nl_tcp)
 927                 return -ENOBUFS;
 928
 929         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 930                         tcp->data_payload_max))
 931                 return -ENOBUFS;
 932
 933         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
 934                         tcp->data_payload_max))
 935                 return -ENOBUFS;
 936
 937         if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
 938                 return -ENOBUFS;
 939
 940         if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
 941                                 sizeof(*tcp->tok), tcp->tok))
 942                 return -ENOBUFS;
 943
 944         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
 945                         tcp->data_interval_max))
 946                 return -ENOBUFS;
 947
 948         if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
 949                         tcp->wake_payload_max))
 950                 return -ENOBUFS;
 951
 952         nla_nest_end(msg, nl_tcp);
 953         return 0;
 954 }
 955
 956 static int nl80211_send_wowlan(struct sk_buff *msg,
 957                                struct cfg80211_registered_device *dev,
 958                                bool large)
 959 {
 960         struct nlattr *nl_wowlan;
 961
 962         if (!dev->wiphy.wowlan.flags && !dev->wiphy.wowlan.n_patterns)
 963                 return 0;
 964
 965         nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 966         if (!nl_wowlan)
 967                 return -ENOBUFS;
 968
 969         if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
 970              nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
 971             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
 972              nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
 973             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
 974              nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
 975             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
 976              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
 977             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
 978              nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
 979             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
 980              nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
 981             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
 982              nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
 983             ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
 984              nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
 985                 return -ENOBUFS;
 986
 987         if (dev->wiphy.wowlan.n_patterns) {
 988                 struct nl80211_wowlan_pattern_support pat = {
 989                         .max_patterns = dev->wiphy.wowlan.n_patterns,
 990                         .min_pattern_len = dev->wiphy.wowlan.pattern_min_len,
 991                         .max_pattern_len = dev->wiphy.wowlan.pattern_max_len,
 992                         .max_pkt_offset = dev->wiphy.wowlan.max_pkt_offset,
 993                 };
 994
 995                 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 996                             sizeof(pat), &pat))
 997                         return -ENOBUFS;
 998         }
 999
1000         if (large && nl80211_send_wowlan_tcp_caps(dev, msg))
1001                 return -ENOBUFS;
1002
1003         nla_nest_end(msg, nl_wowlan);
1004
1005         return 0;
1006 }
1007 #endif
1008
1009 static int nl80211_send_band_rateinfo(struct sk_buff *msg,
1010                                       struct ieee80211_supported_band *sband)
1011 {
1012         struct nlattr *nl_rates, *nl_rate;
1013         struct ieee80211_rate *rate;
1014         int i;
1015
1016         /* add HT info */
1017         if (sband->ht_cap.ht_supported &&
1018             (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1019                      sizeof(sband->ht_cap.mcs),
1020                      &sband->ht_cap.mcs) ||
1021              nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1022                          sband->ht_cap.cap) ||
1023              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1024                         sband->ht_cap.ampdu_factor) ||
1025              nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1026                         sband->ht_cap.ampdu_density)))
1027                 return -ENOBUFS;
1028
1029         /* add VHT info */
1030         if (sband->vht_cap.vht_supported &&
1031             (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1032                      sizeof(sband->vht_cap.vht_mcs),
1033                      &sband->vht_cap.vht_mcs) ||
1034              nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1035                          sband->vht_cap.cap)))
1036                 return -ENOBUFS;
1037
1038         /* add bitrates */
1039         nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1040         if (!nl_rates)
1041                 return -ENOBUFS;
1042
1043         for (i = 0; i < sband->n_bitrates; i++) {
1044                 nl_rate = nla_nest_start(msg, i);
1045                 if (!nl_rate)
1046                         return -ENOBUFS;
1047
1048                 rate = &sband->bitrates[i];
1049                 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1050                                 rate->bitrate))
1051                         return -ENOBUFS;
1052                 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1053                     nla_put_flag(msg,
1054                                  NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1055                         return -ENOBUFS;
1056
1057                 nla_nest_end(msg, nl_rate);
1058         }
1059
1060         nla_nest_end(msg, nl_rates);
1061
1062         return 0;
1063 }
1064
1065 static int
1066 nl80211_send_mgmt_stypes(struct sk_buff *msg,
1067                          const struct ieee80211_txrx_stypes *mgmt_stypes)
1068 {
1069         u16 stypes;
1070         struct nlattr *nl_ftypes, *nl_ifs;
1071         enum nl80211_iftype ift;
1072         int i;
1073
1074         if (!mgmt_stypes)
1075                 return 0;
1076
1077         nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1078         if (!nl_ifs)
1079                 return -ENOBUFS;
1080
1081         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1082                 nl_ftypes = nla_nest_start(msg, ift);
1083                 if (!nl_ftypes)
1084                         return -ENOBUFS;
1085                 i = 0;
1086                 stypes = mgmt_stypes[ift].tx;
1087                 while (stypes) {
1088                         if ((stypes & 1) &&
1089                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1090                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1091                                 return -ENOBUFS;
1092                         stypes >>= 1;
1093                         i++;
1094                 }
1095                 nla_nest_end(msg, nl_ftypes);
1096         }
1097
1098         nla_nest_end(msg, nl_ifs);
1099
1100         nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1101         if (!nl_ifs)
1102                 return -ENOBUFS;
1103
1104         for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1105                 nl_ftypes = nla_nest_start(msg, ift);
1106                 if (!nl_ftypes)
1107                         return -ENOBUFS;
1108                 i = 0;
1109                 stypes = mgmt_stypes[ift].rx;
1110                 while (stypes) {
1111                         if ((stypes & 1) &&
1112                             nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1113                                         (i << 4) | IEEE80211_FTYPE_MGMT))
1114                                 return -ENOBUFS;
1115                         stypes >>= 1;
1116                         i++;
1117                 }
1118                 nla_nest_end(msg, nl_ftypes);
1119         }
1120         nla_nest_end(msg, nl_ifs);
1121
1122         return 0;
1123 }
1124
1125 static int nl80211_send_wiphy(struct cfg80211_registered_device *dev,
1126                               struct sk_buff *msg, u32 portid, u32 seq,
1127                               int flags, bool split, long *split_start,
1128                               long *band_start, long *chan_start)
1129 {
1130         void *hdr;
1131         struct nlattr *nl_bands, *nl_band;
1132         struct nlattr *nl_freqs, *nl_freq;
1133         struct nlattr *nl_cmds;
1134         enum ieee80211_band band;
1135         struct ieee80211_channel *chan;
1136         int i;
1137         const struct ieee80211_txrx_stypes *mgmt_stypes =
1138                                 dev->wiphy.mgmt_stypes;
1139         long start = 0, start_chan = 0, start_band = 0;
1140
1141         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
1142         if (!hdr)
1143                 return -ENOBUFS;
1144
1145         /* allow always using the variables */
1146         if (!split) {
1147                 split_start = &start;
1148                 band_start = &start_band;
1149                 chan_start = &start_chan;
1150         }
1151
1152         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
1153             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
1154                            wiphy_name(&dev->wiphy)) ||
1155             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1156                         cfg80211_rdev_list_generation))
1157                 goto nla_put_failure;
1158
1159         switch (*split_start) {
1160         case 0:
1161                 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
1162                                dev->wiphy.retry_short) ||
1163                     nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
1164                                dev->wiphy.retry_long) ||
1165                     nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
1166                                 dev->wiphy.frag_threshold) ||
1167                     nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
1168                                 dev->wiphy.rts_threshold) ||
1169                     nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
1170                                dev->wiphy.coverage_class) ||
1171                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
1172                                dev->wiphy.max_scan_ssids) ||
1173                     nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
1174                                dev->wiphy.max_sched_scan_ssids) ||
1175                     nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
1176                                 dev->wiphy.max_scan_ie_len) ||
1177                     nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
1178                                 dev->wiphy.max_sched_scan_ie_len) ||
1179                     nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
1180                                dev->wiphy.max_match_sets))
1181                         goto nla_put_failure;
1182
1183                 if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
1184                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
1185                         goto nla_put_failure;
1186                 if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
1187                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
1188                         goto nla_put_failure;
1189                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
1190                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
1191                         goto nla_put_failure;
1192                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
1193                     nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
1194                         goto nla_put_failure;
1195                 if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
1196                     nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
1197                         goto nla_put_failure;
1198                 if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
1199                     nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
1200                         goto nla_put_failure;
1201
1202                 (*split_start)++;
1203                 if (split)
1204                         break;
1205         case 1:
1206                 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
1207                             sizeof(u32) * dev->wiphy.n_cipher_suites,
1208                             dev->wiphy.cipher_suites))
1209                         goto nla_put_failure;
1210
1211                 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
1212                                dev->wiphy.max_num_pmkids))
1213                         goto nla_put_failure;
1214
1215                 if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
1216                     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
1217                         goto nla_put_failure;
1218
1219                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
1220                                 dev->wiphy.available_antennas_tx) ||
1221                     nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
1222                                 dev->wiphy.available_antennas_rx))
1223                         goto nla_put_failure;
1224
1225                 if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
1226                     nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
1227                                 dev->wiphy.probe_resp_offload))
1228                         goto nla_put_failure;
1229
1230                 if ((dev->wiphy.available_antennas_tx ||
1231                      dev->wiphy.available_antennas_rx) &&
1232                     dev->ops->get_antenna) {
1233                         u32 tx_ant = 0, rx_ant = 0;
1234                         int res;
1235                         res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
1236                         if (!res) {
1237                                 if (nla_put_u32(msg,
1238                                                 NL80211_ATTR_WIPHY_ANTENNA_TX,
1239                                                 tx_ant) ||
1240                                     nla_put_u32(msg,
1241                                                 NL80211_ATTR_WIPHY_ANTENNA_RX,
1242                                                 rx_ant))
1243                                         goto nla_put_failure;
1244                         }
1245                 }
1246
1247                 (*split_start)++;
1248                 if (split)
1249                         break;
1250         case 2:
1251                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
1252                                         dev->wiphy.interface_modes))
1253                                 goto nla_put_failure;
1254                 (*split_start)++;
1255                 if (split)
1256                         break;
1257         case 3:
1258                 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1259                 if (!nl_bands)
1260                         goto nla_put_failure;
1261
1262                 for (band = *band_start; band < IEEE80211_NUM_BANDS; band++) {
1263                         struct ieee80211_supported_band *sband;
1264
1265                         sband = dev->wiphy.bands[band];
1266
1267                         if (!sband)
1268                                 continue;
1269
1270                         nl_band = nla_nest_start(msg, band);
1271                         if (!nl_band)
1272                                 goto nla_put_failure;
1273
1274                         switch (*chan_start) {
1275                         case 0:
1276                                 if (nl80211_send_band_rateinfo(msg, sband))
1277                                         goto nla_put_failure;
1278                                 (*chan_start)++;
1279                                 if (split)
1280                                         break;
1281                         default:
1282                                 /* add frequencies */
1283                                 nl_freqs = nla_nest_start(
1284                                         msg, NL80211_BAND_ATTR_FREQS);
1285                                 if (!nl_freqs)
1286                                         goto nla_put_failure;
1287
1288                                 for (i = *chan_start - 1;
1289                                      i < sband->n_channels;
1290                                      i++) {
1291                                         nl_freq = nla_nest_start(msg, i);
1292                                         if (!nl_freq)
1293                                                 goto nla_put_failure;
1294
1295                                         chan = &sband->channels[i];
1296
1297                                         if (nl80211_msg_put_channel(msg, chan,
1298                                                                     split))
1299                                                 goto nla_put_failure;
1300
1301                                         nla_nest_end(msg, nl_freq);
1302                                         if (split)
1303                                                 break;
1304                                 }
1305                                 if (i < sband->n_channels)
1306                                         *chan_start = i + 2;
1307                                 else
1308                                         *chan_start = 0;
1309                                 nla_nest_end(msg, nl_freqs);
1310                         }
1311
1312                         nla_nest_end(msg, nl_band);
1313
1314                         if (split) {
1315                                 /* start again here */
1316                                 if (*chan_start)
1317                                         band--;
1318                                 break;
1319                         }
1320                 }
1321                 nla_nest_end(msg, nl_bands);
1322
1323                 if (band < IEEE80211_NUM_BANDS)
1324                         *band_start = band + 1;
1325                 else
1326                         *band_start = 0;
1327
1328                 /* if bands & channels are done, continue outside */
1329                 if (*band_start == 0 && *chan_start == 0)
1330                         (*split_start)++;
1331                 if (split)
1332                         break;
1333         case 4:
1334                 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1335                 if (!nl_cmds)
1336                         goto nla_put_failure;
1337
1338                 i = 0;
1339 #define CMD(op, n)                                                      \
1340                  do {                                                   \
1341                         if (dev->ops->op) {                             \
1342                                 i++;                                    \
1343                                 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1344                                         goto nla_put_failure;           \
1345                         }                                               \
1346                 } while (0)
1347
1348                 CMD(add_virtual_intf, NEW_INTERFACE);
1349                 CMD(change_virtual_intf, SET_INTERFACE);
1350                 CMD(add_key, NEW_KEY);
1351                 CMD(start_ap, START_AP);
1352                 CMD(add_station, NEW_STATION);
1353                 CMD(add_mpath, NEW_MPATH);
1354                 CMD(update_mesh_config, SET_MESH_CONFIG);
1355                 CMD(change_bss, SET_BSS);
1356                 CMD(auth, AUTHENTICATE);
1357                 CMD(assoc, ASSOCIATE);
1358                 CMD(deauth, DEAUTHENTICATE);
1359                 CMD(disassoc, DISASSOCIATE);
1360                 CMD(join_ibss, JOIN_IBSS);
1361                 CMD(join_mesh, JOIN_MESH);
1362                 CMD(set_pmksa, SET_PMKSA);
1363                 CMD(del_pmksa, DEL_PMKSA);
1364                 CMD(flush_pmksa, FLUSH_PMKSA);
1365                 if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1366                         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1367                 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1368                 CMD(mgmt_tx, FRAME);
1369                 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1370                 if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1371                         i++;
1372                         if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1373                                 goto nla_put_failure;
1374                 }
1375                 if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1376                     dev->ops->join_mesh) {
1377                         i++;
1378                         if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1379                                 goto nla_put_failure;
1380                 }
1381                 CMD(set_wds_peer, SET_WDS_PEER);
1382                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1383                         CMD(tdls_mgmt, TDLS_MGMT);
1384                         CMD(tdls_oper, TDLS_OPER);
1385                 }
1386                 if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1387                         CMD(sched_scan_start, START_SCHED_SCAN);
1388                 CMD(probe_client, PROBE_CLIENT);
1389                 CMD(set_noack_map, SET_NOACK_MAP);
1390                 if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1391                         i++;
1392                         if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1393                                 goto nla_put_failure;
1394                 }
1395                 CMD(start_p2p_device, START_P2P_DEVICE);
1396                 CMD(set_mcast_rate, SET_MCAST_RATE);
1397
1398 #ifdef CONFIG_NL80211_TESTMODE
1399                 CMD(testmode_cmd, TESTMODE);
1400 #endif
1401
1402 #undef CMD
1403
1404                 if (dev->ops->connect || dev->ops->auth) {
1405                         i++;
1406                         if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1407                                 goto nla_put_failure;
1408                 }
1409
1410                 if (dev->ops->disconnect || dev->ops->deauth) {
1411                         i++;
1412                         if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1413                                 goto nla_put_failure;
1414                 }
1415
1416                 nla_nest_end(msg, nl_cmds);
1417                 (*split_start)++;
1418                 if (split)
1419                         break;
1420         case 5:
1421                 if (dev->ops->remain_on_channel &&
1422                     (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1423                     nla_put_u32(msg,
1424                                 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1425                                 dev->wiphy.max_remain_on_channel_duration))
1426                         goto nla_put_failure;
1427
1428                 if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1429                     nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1430                         goto nla_put_failure;
1431
1432                 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
1433                         goto nla_put_failure;
1434                 (*split_start)++;
1435                 if (split)
1436                         break;
1437         case 6:
1438 #ifdef CONFIG_PM
1439                 if (nl80211_send_wowlan(msg, dev, split))
1440                         goto nla_put_failure;
1441                 (*split_start)++;
1442                 if (split)
1443                         break;
1444 #else
1445                 (*split_start)++;
1446 #endif
1447         case 7:
1448                 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1449                                         dev->wiphy.software_iftypes))
1450                         goto nla_put_failure;
1451
1452                 if (nl80211_put_iface_combinations(&dev->wiphy, msg, split))
1453                         goto nla_put_failure;
1454
1455                 (*split_start)++;
1456                 if (split)
1457                         break;
1458         case 8:
1459                 if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1460                     nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1461                                 dev->wiphy.ap_sme_capa))
1462                         goto nla_put_failure;
1463
1464                 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1465                                 dev->wiphy.features))
1466                         goto nla_put_failure;
1467
1468                 if (dev->wiphy.ht_capa_mod_mask &&
1469                     nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1470                             sizeof(*dev->wiphy.ht_capa_mod_mask),
1471                             dev->wiphy.ht_capa_mod_mask))
1472                         goto nla_put_failure;
1473
1474                 if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1475                     dev->wiphy.max_acl_mac_addrs &&
1476                     nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1477                                 dev->wiphy.max_acl_mac_addrs))
1478                         goto nla_put_failure;
1479
1480                 /*
1481                  * Any information below this point is only available to
1482                  * applications that can deal with it being split. This
1483                  * helps ensure that newly added capabilities don't break
1484                  * older tools by overrunning their buffers.
1485                  *
1486                  * We still increment split_start so that in the split
1487                  * case we'll continue with more data in the next round,
1488                  * but break unconditionally so unsplit data stops here.
1489                  */
1490                 (*split_start)++;
1491                 break;
1492         case 9:
1493                 /* placeholder */
1494
1495                 /* done */
1496                 *split_start = 0;
1497                 break;
1498         }
1499         return genlmsg_end(msg, hdr);
1500
1501  nla_put_failure:
1502         genlmsg_cancel(msg, hdr);
1503         return -EMSGSIZE;
1504 }
1505
1506 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1507 {
1508         int idx = 0, ret;
1509         int start = cb->args[0];
1510         struct cfg80211_registered_device *dev;
1511         s64 filter_wiphy = -1;
1512         bool split = false;
1513         struct nlattr **tb = nl80211_fam.attrbuf;
1514         int res;
1515
1516         mutex_lock(&cfg80211_mutex);
1517         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1518                           tb, nl80211_fam.maxattr, nl80211_policy);
1519         if (res == 0) {
1520                 split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
1521                 if (tb[NL80211_ATTR_WIPHY])
1522                         filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
1523                 if (tb[NL80211_ATTR_WDEV])
1524                         filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
1525                 if (tb[NL80211_ATTR_IFINDEX]) {
1526                         struct net_device *netdev;
1527                         int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1528
1529                         netdev = dev_get_by_index(sock_net(skb->sk), ifidx);
1530                         if (!netdev) {
1531                                 mutex_unlock(&cfg80211_mutex);
1532                                 return -ENODEV;
1533                         }
1534                         if (netdev->ieee80211_ptr) {
1535                                 dev = wiphy_to_dev(
1536                                         netdev->ieee80211_ptr->wiphy);
1537                                 filter_wiphy = dev->wiphy_idx;
1538                         }
1539                         dev_put(netdev);
1540                 }
1541         }
1542
1543         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1544                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1545                         continue;
1546                 if (++idx <= start)
1547                         continue;
1548                 if (filter_wiphy != -1 && dev->wiphy_idx != filter_wiphy)
1549                         continue;
1550                 /* attempt to fit multiple wiphy data chunks into the skb */
1551                 do {
1552                         ret = nl80211_send_wiphy(dev, skb,
1553                                                  NETLINK_CB(cb->skb).portid,
1554                                                  cb->nlh->nlmsg_seq,
1555                                                  NLM_F_MULTI,
1556                                                  split, &cb->args[1],
1557                                                  &cb->args[2],
1558                                                  &cb->args[3]);
1559                         if (ret < 0) {
1560                                 /*
1561                                  * If sending the wiphy data didn't fit (ENOBUFS
1562                                  * or EMSGSIZE returned), this SKB is still
1563                                  * empty (so it's not too big because another
1564                                  * wiphy dataset is already in the skb) and
1565                                  * we've not tried to adjust the dump allocation
1566                                  * yet ... then adjust the alloc size to be
1567                                  * bigger, and return 1 but with the empty skb.
1568                                  * This results in an empty message being RX'ed
1569                                  * in userspace, but that is ignored.
1570                                  *
1571                                  * We can then retry with the larger buffer.
1572                                  */
1573                                 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1574                                     !skb->len &&
1575                                     cb->min_dump_alloc < 4096) {
1576                                         cb->min_dump_alloc = 4096;
1577                                         mutex_unlock(&cfg80211_mutex);
1578                                         return 1;
1579                                 }
1580                                 idx--;
1581                                 break;
1582                         }
1583                 } while (cb->args[1] > 0);
1584                 break;
1585         }
1586         mutex_unlock(&cfg80211_mutex);
1587
1588         cb->args[0] = idx;
1589
1590         return skb->len;
1591 }
1592
1593 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1594 {
1595         struct sk_buff *msg;
1596         struct cfg80211_registered_device *dev = info->user_ptr[0];
1597
1598         msg = nlmsg_new(4096, GFP_KERNEL);
1599         if (!msg)
1600                 return -ENOMEM;
1601
1602         if (nl80211_send_wiphy(dev, msg, info->snd_portid, info->snd_seq, 0,
1603                                false, NULL, NULL, NULL) < 0) {
1604                 nlmsg_free(msg);
1605                 return -ENOBUFS;
1606         }
1607
1608         return genlmsg_reply(msg, info);
1609 }
1610
1611 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1612         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1613         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1614         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1615         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1616         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1617 };
1618
1619 static int parse_txq_params(struct nlattr *tb[],
1620                             struct ieee80211_txq_params *txq_params)
1621 {
1622         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1623             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1624             !tb[NL80211_TXQ_ATTR_AIFS])
1625                 return -EINVAL;
1626
1627         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1628         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1629         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1630         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1631         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1632
1633         if (txq_params->ac >= NL80211_NUM_ACS)
1634                 return -EINVAL;
1635
1636         return 0;
1637 }
1638
1639 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1640 {
1641         /*
1642          * You can only set the channel explicitly for WDS interfaces,
1643          * all others have their channel managed via their respective
1644          * "establish a connection" command (connect, join, ...)
1645          *
1646          * For AP/GO and mesh mode, the channel can be set with the
1647          * channel userspace API, but is only stored and passed to the
1648          * low-level driver when the AP starts or the mesh is joined.
1649          * This is for backward compatibility, userspace can also give
1650          * the channel in the start-ap or join-mesh commands instead.
1651          *
1652          * Monitors are special as they are normally slaved to
1653          * whatever else is going on, so they have their own special
1654          * operation to set the monitor channel if possible.
1655          */
1656         return !wdev ||
1657                 wdev->iftype == NL80211_IFTYPE_AP ||
1658                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1659                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1660                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1661 }
1662
1663 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1664                                  struct genl_info *info,
1665                                  struct cfg80211_chan_def *chandef)
1666 {
1667         u32 control_freq;
1668
1669         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1670                 return -EINVAL;
1671
1672         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1673
1674         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1675         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1676         chandef->center_freq1 = control_freq;
1677         chandef->center_freq2 = 0;
1678
1679         /* Primary channel not allowed */
1680         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1681                 return -EINVAL;
1682
1683         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1684                 enum nl80211_channel_type chantype;
1685
1686                 chantype = nla_get_u32(
1687                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1688
1689                 switch (chantype) {
1690                 case NL80211_CHAN_NO_HT:
1691                 case NL80211_CHAN_HT20:
1692                 case NL80211_CHAN_HT40PLUS:
1693                 case NL80211_CHAN_HT40MINUS:
1694                         cfg80211_chandef_create(chandef, chandef->chan,
1695                                                 chantype);
1696                         break;
1697                 default:
1698                         return -EINVAL;
1699                 }
1700         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1701                 chandef->width =
1702                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1703                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1704                         chandef->center_freq1 =
1705                                 nla_get_u32(
1706                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1707                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1708                         chandef->center_freq2 =
1709                                 nla_get_u32(
1710                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1711         }
1712
1713         if (!cfg80211_chandef_valid(chandef))
1714                 return -EINVAL;
1715
1716         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1717                                      IEEE80211_CHAN_DISABLED))
1718                 return -EINVAL;
1719
1720         return 0;
1721 }
1722
1723 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1724                                  struct wireless_dev *wdev,
1725                                  struct genl_info *info)
1726 {
1727         struct cfg80211_chan_def chandef;
1728         int result;
1729         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1730
1731         if (wdev)
1732                 iftype = wdev->iftype;
1733
1734         if (!nl80211_can_set_dev_channel(wdev))
1735                 return -EOPNOTSUPP;
1736
1737         result = nl80211_parse_chandef(rdev, info, &chandef);
1738         if (result)
1739                 return result;
1740
1741         mutex_lock(&rdev->devlist_mtx);
1742         switch (iftype) {
1743         case NL80211_IFTYPE_AP:
1744         case NL80211_IFTYPE_P2P_GO:
1745                 if (wdev->beacon_interval) {
1746                         result = -EBUSY;
1747                         break;
1748                 }
1749                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1750                         result = -EINVAL;
1751                         break;
1752                 }
1753                 wdev->preset_chandef = chandef;
1754                 result = 0;
1755                 break;
1756         case NL80211_IFTYPE_MESH_POINT:
1757                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1758                 break;
1759         case NL80211_IFTYPE_MONITOR:
1760                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1761                 break;
1762         default:
1763                 result = -EINVAL;
1764         }
1765         mutex_unlock(&rdev->devlist_mtx);
1766
1767         return result;
1768 }
1769
1770 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1771 {
1772         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1773         struct net_device *netdev = info->user_ptr[1];
1774
1775         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1776 }
1777
1778 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1779 {
1780         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1781         struct net_device *dev = info->user_ptr[1];
1782         struct wireless_dev *wdev = dev->ieee80211_ptr;
1783         const u8 *bssid;
1784
1785         if (!info->attrs[NL80211_ATTR_MAC])
1786                 return -EINVAL;
1787
1788         if (netif_running(dev))
1789                 return -EBUSY;
1790
1791         if (!rdev->ops->set_wds_peer)
1792                 return -EOPNOTSUPP;
1793
1794         if (wdev->iftype != NL80211_IFTYPE_WDS)
1795                 return -EOPNOTSUPP;
1796
1797         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1798         return rdev_set_wds_peer(rdev, dev, bssid);
1799 }
1800
1801
1802 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1803 {
1804         struct cfg80211_registered_device *rdev;
1805         struct net_device *netdev = NULL;
1806         struct wireless_dev *wdev;
1807         int result = 0, rem_txq_params = 0;
1808         struct nlattr *nl_txq_params;
1809         u32 changed;
1810         u8 retry_short = 0, retry_long = 0;
1811         u32 frag_threshold = 0, rts_threshold = 0;
1812         u8 coverage_class = 0;
1813
1814         /*
1815          * Try to find the wiphy and netdev. Normally this
1816          * function shouldn't need the netdev, but this is
1817          * done for backward compatibility -- previously
1818          * setting the channel was done per wiphy, but now
1819          * it is per netdev. Previous userland like hostapd
1820          * also passed a netdev to set_wiphy, so that it is
1821          * possible to let that go to the right netdev!
1822          */
1823         mutex_lock(&cfg80211_mutex);
1824
1825         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1826                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1827
1828                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1829                 if (netdev && netdev->ieee80211_ptr) {
1830                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1831                         mutex_lock(&rdev->mtx);
1832                 } else
1833                         netdev = NULL;
1834         }
1835
1836         if (!netdev) {
1837                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1838                                                   info->attrs);
1839                 if (IS_ERR(rdev)) {
1840                         mutex_unlock(&cfg80211_mutex);
1841                         return PTR_ERR(rdev);
1842                 }
1843                 wdev = NULL;
1844                 netdev = NULL;
1845                 result = 0;
1846
1847                 mutex_lock(&rdev->mtx);
1848         } else
1849                 wdev = netdev->ieee80211_ptr;
1850
1851         /*
1852          * end workaround code, by now the rdev is available
1853          * and locked, and wdev may or may not be NULL.
1854          */
1855
1856         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1857                 result = cfg80211_dev_rename(
1858                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1859
1860         mutex_unlock(&cfg80211_mutex);
1861
1862         if (result)
1863                 goto bad_res;
1864
1865         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1866                 struct ieee80211_txq_params txq_params;
1867                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1868
1869                 if (!rdev->ops->set_txq_params) {
1870                         result = -EOPNOTSUPP;
1871                         goto bad_res;
1872                 }
1873
1874                 if (!netdev) {
1875                         result = -EINVAL;
1876                         goto bad_res;
1877                 }
1878
1879                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1880                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1881                         result = -EINVAL;
1882                         goto bad_res;
1883                 }
1884
1885                 if (!netif_running(netdev)) {
1886                         result = -ENETDOWN;
1887                         goto bad_res;
1888                 }
1889
1890                 nla_for_each_nested(nl_txq_params,
1891                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1892                                     rem_txq_params) {
1893                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1894                                   nla_data(nl_txq_params),
1895                                   nla_len(nl_txq_params),
1896                                   txq_params_policy);
1897                         result = parse_txq_params(tb, &txq_params);
1898                         if (result)
1899                                 goto bad_res;
1900
1901                         result = rdev_set_txq_params(rdev, netdev,
1902                                                      &txq_params);
1903                         if (result)
1904                                 goto bad_res;
1905                 }
1906         }
1907
1908         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1909                 result = __nl80211_set_channel(rdev,
1910                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1911                                 info);
1912                 if (result)
1913                         goto bad_res;
1914         }
1915
1916         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1917                 struct wireless_dev *txp_wdev = wdev;
1918                 enum nl80211_tx_power_setting type;
1919                 int idx, mbm = 0;
1920
1921                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1922                         txp_wdev = NULL;
1923
1924                 if (!rdev->ops->set_tx_power) {
1925                         result = -EOPNOTSUPP;
1926                         goto bad_res;
1927                 }
1928
1929                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1930                 type = nla_get_u32(info->attrs[idx]);
1931
1932                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1933                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1934                         result = -EINVAL;
1935                         goto bad_res;
1936                 }
1937
1938                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1939                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1940                         mbm = nla_get_u32(info->attrs[idx]);
1941                 }
1942
1943                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1944                 if (result)
1945                         goto bad_res;
1946         }
1947
1948         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1949             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1950                 u32 tx_ant, rx_ant;
1951                 if ((!rdev->wiphy.available_antennas_tx &&
1952                      !rdev->wiphy.available_antennas_rx) ||
1953                     !rdev->ops->set_antenna) {
1954                         result = -EOPNOTSUPP;
1955                         goto bad_res;
1956                 }
1957
1958                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1959                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1960
1961                 /* reject antenna configurations which don't match the
1962                  * available antenna masks, except for the "all" mask */
1963                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1964                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1965                         result = -EINVAL;
1966                         goto bad_res;
1967                 }
1968
1969                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1970                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1971
1972                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1973                 if (result)
1974                         goto bad_res;
1975         }
1976
1977         changed = 0;
1978
1979         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1980                 retry_short = nla_get_u8(
1981                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1982                 if (retry_short == 0) {
1983                         result = -EINVAL;
1984                         goto bad_res;
1985                 }
1986                 changed |= WIPHY_PARAM_RETRY_SHORT;
1987         }
1988
1989         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1990                 retry_long = nla_get_u8(
1991                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1992                 if (retry_long == 0) {
1993                         result = -EINVAL;
1994                         goto bad_res;
1995                 }
1996                 changed |= WIPHY_PARAM_RETRY_LONG;
1997         }
1998
1999         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
2000                 frag_threshold = nla_get_u32(
2001                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
2002                 if (frag_threshold < 256) {
2003                         result = -EINVAL;
2004                         goto bad_res;
2005                 }
2006                 if (frag_threshold != (u32) -1) {
2007                         /*
2008                          * Fragments (apart from the last one) are required to
2009                          * have even length. Make the fragmentation code
2010                          * simpler by stripping LSB should someone try to use
2011                          * odd threshold value.
2012                          */
2013                         frag_threshold &= ~0x1;
2014                 }
2015                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
2016         }
2017
2018         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
2019                 rts_threshold = nla_get_u32(
2020                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
2021                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
2022         }
2023
2024         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
2025                 coverage_class = nla_get_u8(
2026                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
2027                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
2028         }
2029
2030         if (changed) {
2031                 u8 old_retry_short, old_retry_long;
2032                 u32 old_frag_threshold, old_rts_threshold;
2033                 u8 old_coverage_class;
2034
2035                 if (!rdev->ops->set_wiphy_params) {
2036                         result = -EOPNOTSUPP;
2037                         goto bad_res;
2038                 }
2039
2040                 old_retry_short = rdev->wiphy.retry_short;
2041                 old_retry_long = rdev->wiphy.retry_long;
2042                 old_frag_threshold = rdev->wiphy.frag_threshold;
2043                 old_rts_threshold = rdev->wiphy.rts_threshold;
2044                 old_coverage_class = rdev->wiphy.coverage_class;
2045
2046                 if (changed & WIPHY_PARAM_RETRY_SHORT)
2047                         rdev->wiphy.retry_short = retry_short;
2048                 if (changed & WIPHY_PARAM_RETRY_LONG)
2049                         rdev->wiphy.retry_long = retry_long;
2050                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
2051                         rdev->wiphy.frag_threshold = frag_threshold;
2052                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
2053                         rdev->wiphy.rts_threshold = rts_threshold;
2054                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
2055                         rdev->wiphy.coverage_class = coverage_class;
2056
2057                 result = rdev_set_wiphy_params(rdev, changed);
2058                 if (result) {
2059                         rdev->wiphy.retry_short = old_retry_short;
2060                         rdev->wiphy.retry_long = old_retry_long;
2061                         rdev->wiphy.frag_threshold = old_frag_threshold;
2062                         rdev->wiphy.rts_threshold = old_rts_threshold;
2063                         rdev->wiphy.coverage_class = old_coverage_class;
2064                 }
2065         }
2066
2067  bad_res:
2068         mutex_unlock(&rdev->mtx);
2069         if (netdev)
2070                 dev_put(netdev);
2071         return result;
2072 }
2073
2074 static inline u64 wdev_id(struct wireless_dev *wdev)
2075 {
2076         return (u64)wdev->identifier |
2077                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
2078 }
2079
2080 static int nl80211_send_chandef(struct sk_buff *msg,
2081                                  struct cfg80211_chan_def *chandef)
2082 {
2083         WARN_ON(!cfg80211_chandef_valid(chandef));
2084
2085         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
2086                         chandef->chan->center_freq))
2087                 return -ENOBUFS;
2088         switch (chandef->width) {
2089         case NL80211_CHAN_WIDTH_20_NOHT:
2090         case NL80211_CHAN_WIDTH_20:
2091         case NL80211_CHAN_WIDTH_40:
2092                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2093                                 cfg80211_get_chandef_type(chandef)))
2094                         return -ENOBUFS;
2095                 break;
2096         default:
2097                 break;
2098         }
2099         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
2100                 return -ENOBUFS;
2101         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
2102                 return -ENOBUFS;
2103         if (chandef->center_freq2 &&
2104             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
2105                 return -ENOBUFS;
2106         return 0;
2107 }
2108
2109 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
2110                               struct cfg80211_registered_device *rdev,
2111                               struct wireless_dev *wdev)
2112 {
2113         struct net_device *dev = wdev->netdev;
2114         void *hdr;
2115
2116         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
2117         if (!hdr)
2118                 return -1;
2119
2120         if (dev &&
2121             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2122              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
2123                 goto nla_put_failure;
2124
2125         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
2126             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
2127             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
2128             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
2129             nla_put_u32(msg, NL80211_ATTR_GENERATION,
2130                         rdev->devlist_generation ^
2131                         (cfg80211_rdev_list_generation << 2)))
2132                 goto nla_put_failure;
2133
2134         if (rdev->ops->get_channel) {
2135                 int ret;
2136                 struct cfg80211_chan_def chandef;
2137
2138                 ret = rdev_get_channel(rdev, wdev, &chandef);
2139                 if (ret == 0) {
2140                         if (nl80211_send_chandef(msg, &chandef))
2141                                 goto nla_put_failure;
2142                 }
2143         }
2144
2145         if (wdev->ssid_len) {
2146                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
2147                         goto nla_put_failure;
2148         }
2149
2150         return genlmsg_end(msg, hdr);
2151
2152  nla_put_failure:
2153         genlmsg_cancel(msg, hdr);
2154         return -EMSGSIZE;
2155 }
2156
2157 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
2158 {
2159         int wp_idx = 0;
2160         int if_idx = 0;
2161         int wp_start = cb->args[0];
2162         int if_start = cb->args[1];
2163         struct cfg80211_registered_device *rdev;
2164         struct wireless_dev *wdev;
2165
2166         mutex_lock(&cfg80211_mutex);
2167         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2168                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
2169                         continue;
2170                 if (wp_idx < wp_start) {
2171                         wp_idx++;
2172                         continue;
2173                 }
2174                 if_idx = 0;
2175
2176                 mutex_lock(&rdev->devlist_mtx);
2177                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
2178                         if (if_idx < if_start) {
2179                                 if_idx++;
2180                                 continue;
2181                         }
2182                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
2183                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
2184                                                rdev, wdev) < 0) {
2185                                 mutex_unlock(&rdev->devlist_mtx);
2186                                 goto out;
2187                         }
2188                         if_idx++;
2189                 }
2190                 mutex_unlock(&rdev->devlist_mtx);
2191
2192                 wp_idx++;
2193         }
2194  out:
2195         mutex_unlock(&cfg80211_mutex);
2196
2197         cb->args[0] = wp_idx;
2198         cb->args[1] = if_idx;
2199
2200         return skb->len;
2201 }
2202
2203 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
2204 {
2205         struct sk_buff *msg;
2206         struct cfg80211_registered_device *dev = info->user_ptr[0];
2207         struct wireless_dev *wdev = info->user_ptr[1];
2208
2209         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2210         if (!msg)
2211                 return -ENOMEM;
2212
2213         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2214                                dev, wdev) < 0) {
2215                 nlmsg_free(msg);
2216                 return -ENOBUFS;
2217         }
2218
2219         return genlmsg_reply(msg, info);
2220 }
2221
2222 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
2223         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
2224         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
2225         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
2226         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
2227         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
2228 };
2229
2230 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
2231 {
2232         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
2233         int flag;
2234
2235         *mntrflags = 0;
2236
2237         if (!nla)
2238                 return -EINVAL;
2239
2240         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2241                              nla, mntr_flags_policy))
2242                 return -EINVAL;
2243
2244         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2245                 if (flags[flag])
2246                         *mntrflags |= (1<<flag);
2247
2248         return 0;
2249 }
2250
2251 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2252                                struct net_device *netdev, u8 use_4addr,
2253                                enum nl80211_iftype iftype)
2254 {
2255         if (!use_4addr) {
2256                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2257                         return -EBUSY;
2258                 return 0;
2259         }
2260
2261         switch (iftype) {
2262         case NL80211_IFTYPE_AP_VLAN:
2263                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2264                         return 0;
2265                 break;
2266         case NL80211_IFTYPE_STATION:
2267                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2268                         return 0;
2269                 break;
2270         default:
2271                 break;
2272         }
2273
2274         return -EOPNOTSUPP;
2275 }
2276
2277 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2278 {
2279         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2280         struct vif_params params;
2281         int err;
2282         enum nl80211_iftype otype, ntype;
2283         struct net_device *dev = info->user_ptr[1];
2284         u32 _flags, *flags = NULL;
2285         bool change = false;
2286
2287         memset(&params, 0, sizeof(params));
2288
2289         otype = ntype = dev->ieee80211_ptr->iftype;
2290
2291         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2292                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2293                 if (otype != ntype)
2294                         change = true;
2295                 if (ntype > NL80211_IFTYPE_MAX)
2296                         return -EINVAL;
2297         }
2298
2299         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2300                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2301
2302                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2303                         return -EINVAL;
2304                 if (netif_running(dev))
2305                         return -EBUSY;
2306
2307                 wdev_lock(wdev);
2308                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2309                              IEEE80211_MAX_MESH_ID_LEN);
2310                 wdev->mesh_id_up_len =
2311                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2312                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2313                        wdev->mesh_id_up_len);
2314                 wdev_unlock(wdev);
2315         }
2316
2317         if (info->attrs[NL80211_ATTR_4ADDR]) {
2318                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2319                 change = true;
2320                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2321                 if (err)
2322                         return err;
2323         } else {
2324                 params.use_4addr = -1;
2325         }
2326
2327         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2328                 if (ntype != NL80211_IFTYPE_MONITOR)
2329                         return -EINVAL;
2330                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2331                                           &_flags);
2332                 if (err)
2333                         return err;
2334
2335                 flags = &_flags;
2336                 change = true;
2337         }
2338
2339         if (change)
2340                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2341         else
2342                 err = 0;
2343
2344         if (!err && params.use_4addr != -1)
2345                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2346
2347         return err;
2348 }
2349
2350 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2351 {
2352         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2353         struct vif_params params;
2354         struct wireless_dev *wdev;
2355         struct sk_buff *msg;
2356         int err;
2357         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2358         u32 flags;
2359
2360         memset(&params, 0, sizeof(params));
2361
2362         if (!info->attrs[NL80211_ATTR_IFNAME])
2363                 return -EINVAL;
2364
2365         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2366                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2367                 if (type > NL80211_IFTYPE_MAX)
2368                         return -EINVAL;
2369         }
2370
2371         if (!rdev->ops->add_virtual_intf ||
2372             !(rdev->wiphy.interface_modes & (1 << type)))
2373                 return -EOPNOTSUPP;
2374
2375         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2376                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2377                            ETH_ALEN);
2378                 if (!is_valid_ether_addr(params.macaddr))
2379                         return -EADDRNOTAVAIL;
2380         }
2381
2382         if (info->attrs[NL80211_ATTR_4ADDR]) {
2383                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2384                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2385                 if (err)
2386                         return err;
2387         }
2388
2389         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2390         if (!msg)
2391                 return -ENOMEM;
2392
2393         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2394                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2395                                   &flags);
2396         wdev = rdev_add_virtual_intf(rdev,
2397                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2398                                 type, err ? NULL : &flags, &params);
2399         if (IS_ERR(wdev)) {
2400                 nlmsg_free(msg);
2401                 return PTR_ERR(wdev);
2402         }
2403
2404         switch (type) {
2405         case NL80211_IFTYPE_MESH_POINT:
2406                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2407                         break;
2408                 wdev_lock(wdev);
2409                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2410                              IEEE80211_MAX_MESH_ID_LEN);
2411                 wdev->mesh_id_up_len =
2412                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2413                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2414                        wdev->mesh_id_up_len);
2415                 wdev_unlock(wdev);
2416                 break;
2417         case NL80211_IFTYPE_P2P_DEVICE:
2418                 /*
2419                  * P2P Device doesn't have a netdev, so doesn't go
2420                  * through the netdev notifier and must be added here
2421                  */
2422                 mutex_init(&wdev->mtx);
2423                 INIT_LIST_HEAD(&wdev->event_list);
2424                 spin_lock_init(&wdev->event_lock);
2425                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2426                 spin_lock_init(&wdev->mgmt_registrations_lock);
2427
2428                 mutex_lock(&rdev->devlist_mtx);
2429                 wdev->identifier = ++rdev->wdev_id;
2430                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2431                 rdev->devlist_generation++;
2432                 mutex_unlock(&rdev->devlist_mtx);
2433                 break;
2434         default:
2435                 break;
2436         }
2437
2438         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2439                                rdev, wdev) < 0) {
2440                 nlmsg_free(msg);
2441                 return -ENOBUFS;
2442         }
2443
2444         return genlmsg_reply(msg, info);
2445 }
2446
2447 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2448 {
2449         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2450         struct wireless_dev *wdev = info->user_ptr[1];
2451
2452         if (!rdev->ops->del_virtual_intf)
2453                 return -EOPNOTSUPP;
2454
2455         /*
2456          * If we remove a wireless device without a netdev then clear
2457          * user_ptr[1] so that nl80211_post_doit won't dereference it
2458          * to check if it needs to do dev_put(). Otherwise it crashes
2459          * since the wdev has been freed, unlike with a netdev where
2460          * we need the dev_put() for the netdev to really be freed.
2461          */
2462         if (!wdev->netdev)
2463                 info->user_ptr[1] = NULL;
2464
2465         return rdev_del_virtual_intf(rdev, wdev);
2466 }
2467
2468 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2469 {
2470         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2471         struct net_device *dev = info->user_ptr[1];
2472         u16 noack_map;
2473
2474         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2475                 return -EINVAL;
2476
2477         if (!rdev->ops->set_noack_map)
2478                 return -EOPNOTSUPP;
2479
2480         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2481
2482         return rdev_set_noack_map(rdev, dev, noack_map);
2483 }
2484
2485 struct get_key_cookie {
2486         struct sk_buff *msg;
2487         int error;
2488         int idx;
2489 };
2490
2491 static void get_key_callback(void *c, struct key_params *params)
2492 {
2493         struct nlattr *key;
2494         struct get_key_cookie *cookie = c;
2495
2496         if ((params->key &&
2497              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2498                      params->key_len, params->key)) ||
2499             (params->seq &&
2500              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2501                      params->seq_len, params->seq)) ||
2502             (params->cipher &&
2503              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2504                          params->cipher)))
2505                 goto nla_put_failure;
2506
2507         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2508         if (!key)
2509                 goto nla_put_failure;
2510
2511         if ((params->key &&
2512              nla_put(cookie->msg, NL80211_KEY_DATA,
2513                      params->key_len, params->key)) ||
2514             (params->seq &&
2515              nla_put(cookie->msg, NL80211_KEY_SEQ,
2516                      params->seq_len, params->seq)) ||
2517             (params->cipher &&
2518              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2519                          params->cipher)))
2520                 goto nla_put_failure;
2521
2522         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2523                 goto nla_put_failure;
2524
2525         nla_nest_end(cookie->msg, key);
2526
2527         return;
2528  nla_put_failure:
2529         cookie->error = 1;
2530 }
2531
2532 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2533 {
2534         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2535         int err;
2536         struct net_device *dev = info->user_ptr[1];
2537         u8 key_idx = 0;
2538         const u8 *mac_addr = NULL;
2539         bool pairwise;
2540         struct get_key_cookie cookie = {
2541                 .error = 0,
2542         };
2543         void *hdr;
2544         struct sk_buff *msg;
2545
2546         if (info->attrs[NL80211_ATTR_KEY_IDX])
2547                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2548
2549         if (key_idx > 5)
2550                 return -EINVAL;
2551
2552         if (info->attrs[NL80211_ATTR_MAC])
2553                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2554
2555         pairwise = !!mac_addr;
2556         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2557                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2558                 if (kt >= NUM_NL80211_KEYTYPES)
2559                         return -EINVAL;
2560                 if (kt != NL80211_KEYTYPE_GROUP &&
2561                     kt != NL80211_KEYTYPE_PAIRWISE)
2562                         return -EINVAL;
2563                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2564         }
2565
2566         if (!rdev->ops->get_key)
2567                 return -EOPNOTSUPP;
2568
2569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2570         if (!msg)
2571                 return -ENOMEM;
2572
2573         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2574                              NL80211_CMD_NEW_KEY);
2575         if (IS_ERR(hdr))
2576                 return PTR_ERR(hdr);
2577
2578         cookie.msg = msg;
2579         cookie.idx = key_idx;
2580
2581         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2582             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2583                 goto nla_put_failure;
2584         if (mac_addr &&
2585             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2586                 goto nla_put_failure;
2587
2588         if (pairwise && mac_addr &&
2589             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2590                 return -ENOENT;
2591
2592         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2593                            get_key_callback);
2594
2595         if (err)
2596                 goto free_msg;
2597
2598         if (cookie.error)
2599                 goto nla_put_failure;
2600
2601         genlmsg_end(msg, hdr);
2602         return genlmsg_reply(msg, info);
2603
2604  nla_put_failure:
2605         err = -ENOBUFS;
2606  free_msg:
2607         nlmsg_free(msg);
2608         return err;
2609 }
2610
2611 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2612 {
2613         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2614         struct key_parse key;
2615         int err;
2616         struct net_device *dev = info->user_ptr[1];
2617
2618         err = nl80211_parse_key(info, &key);
2619         if (err)
2620                 return err;
2621
2622         if (key.idx < 0)
2623                 return -EINVAL;
2624
2625         /* only support setting default key */
2626         if (!key.def && !key.defmgmt)
2627                 return -EINVAL;
2628
2629         wdev_lock(dev->ieee80211_ptr);
2630
2631         if (key.def) {
2632                 if (!rdev->ops->set_default_key) {
2633                         err = -EOPNOTSUPP;
2634                         goto out;
2635                 }
2636
2637                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2638                 if (err)
2639                         goto out;
2640
2641                 err = rdev_set_default_key(rdev, dev, key.idx,
2642                                                  key.def_uni, key.def_multi);
2643
2644                 if (err)
2645                         goto out;
2646
2647 #ifdef CONFIG_CFG80211_WEXT
2648                 dev->ieee80211_ptr->wext.default_key = key.idx;
2649 #endif
2650         } else {
2651                 if (key.def_uni || !key.def_multi) {
2652                         err = -EINVAL;
2653                         goto out;
2654                 }
2655
2656                 if (!rdev->ops->set_default_mgmt_key) {
2657                         err = -EOPNOTSUPP;
2658                         goto out;
2659                 }
2660
2661                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2662                 if (err)
2663                         goto out;
2664
2665                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2666                 if (err)
2667                         goto out;
2668
2669 #ifdef CONFIG_CFG80211_WEXT
2670                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2671 #endif
2672         }
2673
2674  out:
2675         wdev_unlock(dev->ieee80211_ptr);
2676
2677         return err;
2678 }
2679
2680 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2681 {
2682         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2683         int err;
2684         struct net_device *dev = info->user_ptr[1];
2685         struct key_parse key;
2686         const u8 *mac_addr = NULL;
2687
2688         err = nl80211_parse_key(info, &key);
2689         if (err)
2690                 return err;
2691
2692         if (!key.p.key)
2693                 return -EINVAL;
2694
2695         if (info->attrs[NL80211_ATTR_MAC])
2696                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2697
2698         if (key.type == -1) {
2699                 if (mac_addr)
2700                         key.type = NL80211_KEYTYPE_PAIRWISE;
2701                 else
2702                         key.type = NL80211_KEYTYPE_GROUP;
2703         }
2704
2705         /* for now */
2706         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2707             key.type != NL80211_KEYTYPE_GROUP)
2708                 return -EINVAL;
2709
2710         if (!rdev->ops->add_key)
2711                 return -EOPNOTSUPP;
2712
2713         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2714                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2715                                            mac_addr))
2716                 return -EINVAL;
2717
2718         wdev_lock(dev->ieee80211_ptr);
2719         err = nl80211_key_allowed(dev->ieee80211_ptr);
2720         if (!err)
2721                 err = rdev_add_key(rdev, dev, key.idx,
2722                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2723                                     mac_addr, &key.p);
2724         wdev_unlock(dev->ieee80211_ptr);
2725
2726         return err;
2727 }
2728
2729 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2730 {
2731         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2732         int err;
2733         struct net_device *dev = info->user_ptr[1];
2734         u8 *mac_addr = NULL;
2735         struct key_parse key;
2736
2737         err = nl80211_parse_key(info, &key);
2738         if (err)
2739                 return err;
2740
2741         if (info->attrs[NL80211_ATTR_MAC])
2742                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2743
2744         if (key.type == -1) {
2745                 if (mac_addr)
2746                         key.type = NL80211_KEYTYPE_PAIRWISE;
2747                 else
2748                         key.type = NL80211_KEYTYPE_GROUP;
2749         }
2750
2751         /* for now */
2752         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2753             key.type != NL80211_KEYTYPE_GROUP)
2754                 return -EINVAL;
2755
2756         if (!rdev->ops->del_key)
2757                 return -EOPNOTSUPP;
2758
2759         wdev_lock(dev->ieee80211_ptr);
2760         err = nl80211_key_allowed(dev->ieee80211_ptr);
2761
2762         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2763             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2764                 err = -ENOENT;
2765
2766         if (!err)
2767                 err = rdev_del_key(rdev, dev, key.idx,
2768                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2769                                    mac_addr);
2770
2771 #ifdef CONFIG_CFG80211_WEXT
2772         if (!err) {
2773                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2774                         dev->ieee80211_ptr->wext.default_key = -1;
2775                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2776                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2777         }
2778 #endif
2779         wdev_unlock(dev->ieee80211_ptr);
2780
2781         return err;
2782 }
2783
2784 /* This function returns an error or the number of nested attributes */
2785 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2786 {
2787         struct nlattr *attr;
2788         int n_entries = 0, tmp;
2789
2790         nla_for_each_nested(attr, nl_attr, tmp) {
2791                 if (nla_len(attr) != ETH_ALEN)
2792                         return -EINVAL;
2793
2794                 n_entries++;
2795         }
2796
2797         return n_entries;
2798 }
2799
2800 /*
2801  * This function parses ACL information and allocates memory for ACL data.
2802  * On successful return, the calling function is responsible to free the
2803  * ACL buffer returned by this function.
2804  */
2805 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2806                                                 struct genl_info *info)
2807 {
2808         enum nl80211_acl_policy acl_policy;
2809         struct nlattr *attr;
2810         struct cfg80211_acl_data *acl;
2811         int i = 0, n_entries, tmp;
2812
2813         if (!wiphy->max_acl_mac_addrs)
2814                 return ERR_PTR(-EOPNOTSUPP);
2815
2816         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2817                 return ERR_PTR(-EINVAL);
2818
2819         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2820         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2821             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2822                 return ERR_PTR(-EINVAL);
2823
2824         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2825                 return ERR_PTR(-EINVAL);
2826
2827         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2828         if (n_entries < 0)
2829                 return ERR_PTR(n_entries);
2830
2831         if (n_entries > wiphy->max_acl_mac_addrs)
2832                 return ERR_PTR(-ENOTSUPP);
2833
2834         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2835                       GFP_KERNEL);
2836         if (!acl)
2837                 return ERR_PTR(-ENOMEM);
2838
2839         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2840                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2841                 i++;
2842         }
2843
2844         acl->n_acl_entries = n_entries;
2845         acl->acl_policy = acl_policy;
2846
2847         return acl;
2848 }
2849
2850 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2851 {
2852         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2853         struct net_device *dev = info->user_ptr[1];
2854         struct cfg80211_acl_data *acl;
2855         int err;
2856
2857         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2858             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2859                 return -EOPNOTSUPP;
2860
2861         if (!dev->ieee80211_ptr->beacon_interval)
2862                 return -EINVAL;
2863
2864         acl = parse_acl_data(&rdev->wiphy, info);
2865         if (IS_ERR(acl))
2866                 return PTR_ERR(acl);
2867
2868         err = rdev_set_mac_acl(rdev, dev, acl);
2869
2870         kfree(acl);
2871
2872         return err;
2873 }
2874
2875 static int nl80211_parse_beacon(struct genl_info *info,
2876                                 struct cfg80211_beacon_data *bcn)
2877 {
2878         bool haveinfo = false;
2879
2880         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2881             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2882             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2883             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2884                 return -EINVAL;
2885
2886         memset(bcn, 0, sizeof(*bcn));
2887
2888         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2889                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2890                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2891                 if (!bcn->head_len)
2892                         return -EINVAL;
2893                 haveinfo = true;
2894         }
2895
2896         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2897                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2898                 bcn->tail_len =
2899                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2900                 haveinfo = true;
2901         }
2902
2903         if (!haveinfo)
2904                 return -EINVAL;
2905
2906         if (info->attrs[NL80211_ATTR_IE]) {
2907                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2908                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2909         }
2910
2911         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2912                 bcn->proberesp_ies =
2913                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2914                 bcn->proberesp_ies_len =
2915                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2916         }
2917
2918         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2919                 bcn->assocresp_ies =
2920                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2921                 bcn->assocresp_ies_len =
2922                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2923         }
2924
2925         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2926                 bcn->probe_resp =
2927                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2928                 bcn->probe_resp_len =
2929                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2930         }
2931
2932         return 0;
2933 }
2934
2935 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2936                                    struct cfg80211_ap_settings *params)
2937 {
2938         struct wireless_dev *wdev;
2939         bool ret = false;
2940
2941         mutex_lock(&rdev->devlist_mtx);
2942
2943         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2944                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2945                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2946                         continue;
2947
2948                 if (!wdev->preset_chandef.chan)
2949                         continue;
2950
2951                 params->chandef = wdev->preset_chandef;
2952                 ret = true;
2953                 break;
2954         }
2955
2956         mutex_unlock(&rdev->devlist_mtx);
2957
2958         return ret;
2959 }
2960
2961 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2962                                     enum nl80211_auth_type auth_type,
2963                                     enum nl80211_commands cmd)
2964 {
2965         if (auth_type > NL80211_AUTHTYPE_MAX)
2966                 return false;
2967
2968         switch (cmd) {
2969         case NL80211_CMD_AUTHENTICATE:
2970                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2971                     auth_type == NL80211_AUTHTYPE_SAE)
2972                         return false;
2973                 return true;
2974         case NL80211_CMD_CONNECT:
2975         case NL80211_CMD_START_AP:
2976                 /* SAE not supported yet */
2977                 if (auth_type == NL80211_AUTHTYPE_SAE)
2978                         return false;
2979                 return true;
2980         default:
2981                 return false;
2982         }
2983 }
2984
2985 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2986 {
2987         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2988         struct net_device *dev = info->user_ptr[1];
2989         struct wireless_dev *wdev = dev->ieee80211_ptr;
2990         struct cfg80211_ap_settings params;
2991         int err;
2992         u8 radar_detect_width = 0;
2993
2994         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2995             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2996                 return -EOPNOTSUPP;
2997
2998         if (!rdev->ops->start_ap)
2999                 return -EOPNOTSUPP;
3000
3001         if (wdev->beacon_interval)
3002                 return -EALREADY;
3003
3004         memset(&params, 0, sizeof(params));
3005
3006         /* these are required for START_AP */
3007         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
3008             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
3009             !info->attrs[NL80211_ATTR_BEACON_HEAD])
3010                 return -EINVAL;
3011
3012         err = nl80211_parse_beacon(info, &params.beacon);
3013         if (err)
3014                 return err;
3015
3016         params.beacon_interval =
3017                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3018         params.dtim_period =
3019                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
3020
3021         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
3022         if (err)
3023                 return err;
3024
3025         /*
3026          * In theory, some of these attributes should be required here
3027          * but since they were not used when the command was originally
3028          * added, keep them optional for old user space programs to let
3029          * them continue to work with drivers that do not need the
3030          * additional information -- drivers must check!
3031          */
3032         if (info->attrs[NL80211_ATTR_SSID]) {
3033                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3034                 params.ssid_len =
3035                         nla_len(info->attrs[NL80211_ATTR_SSID]);
3036                 if (params.ssid_len == 0 ||
3037                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
3038                         return -EINVAL;
3039         }
3040
3041         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
3042                 params.hidden_ssid = nla_get_u32(
3043                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
3044                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
3045                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
3046                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
3047                         return -EINVAL;
3048         }
3049
3050         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3051
3052         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3053                 params.auth_type = nla_get_u32(
3054                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
3055                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
3056                                              NL80211_CMD_START_AP))
3057                         return -EINVAL;
3058         } else
3059                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3060
3061         err = nl80211_crypto_settings(rdev, info, &params.crypto,
3062                                       NL80211_MAX_NR_CIPHER_SUITES);
3063         if (err)
3064                 return err;
3065
3066         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
3067                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
3068                         return -EOPNOTSUPP;
3069                 params.inactivity_timeout = nla_get_u16(
3070                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
3071         }
3072
3073         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3074                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3075                         return -EINVAL;
3076                 params.p2p_ctwindow =
3077                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3078                 if (params.p2p_ctwindow > 127)
3079                         return -EINVAL;
3080                 if (params.p2p_ctwindow != 0 &&
3081                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3082                         return -EINVAL;
3083         }
3084
3085         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3086                 u8 tmp;
3087
3088                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3089                         return -EINVAL;
3090                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3091                 if (tmp > 1)
3092                         return -EINVAL;
3093                 params.p2p_opp_ps = tmp;
3094                 if (params.p2p_opp_ps != 0 &&
3095                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3096                         return -EINVAL;
3097         }
3098
3099         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3100                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
3101                 if (err)
3102                         return err;
3103         } else if (wdev->preset_chandef.chan) {
3104                 params.chandef = wdev->preset_chandef;
3105         } else if (!nl80211_get_ap_channel(rdev, &params))
3106                 return -EINVAL;
3107
3108         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
3109                 return -EINVAL;
3110
3111         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
3112         if (err < 0)
3113                 return err;
3114         if (err) {
3115                 radar_detect_width = BIT(params.chandef.width);
3116                 params.radar_required = true;
3117         }
3118
3119         mutex_lock(&rdev->devlist_mtx);
3120         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
3121                                            params.chandef.chan,
3122                                            CHAN_MODE_SHARED,
3123                                            radar_detect_width);
3124         mutex_unlock(&rdev->devlist_mtx);
3125
3126         if (err)
3127                 return err;
3128
3129         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
3130                 params.acl = parse_acl_data(&rdev->wiphy, info);
3131                 if (IS_ERR(params.acl))
3132                         return PTR_ERR(params.acl);
3133         }
3134
3135         err = rdev_start_ap(rdev, dev, &params);
3136         if (!err) {
3137                 wdev->preset_chandef = params.chandef;
3138                 wdev->beacon_interval = params.beacon_interval;
3139                 wdev->channel = params.chandef.chan;
3140                 wdev->ssid_len = params.ssid_len;
3141                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
3142         }
3143
3144         kfree(params.acl);
3145
3146         return err;
3147 }
3148
3149 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
3150 {
3151         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3152         struct net_device *dev = info->user_ptr[1];
3153         struct wireless_dev *wdev = dev->ieee80211_ptr;
3154         struct cfg80211_beacon_data params;
3155         int err;
3156
3157         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3158             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3159                 return -EOPNOTSUPP;
3160
3161         if (!rdev->ops->change_beacon)
3162                 return -EOPNOTSUPP;
3163
3164         if (!wdev->beacon_interval)
3165                 return -EINVAL;
3166
3167         err = nl80211_parse_beacon(info, &params);
3168         if (err)
3169                 return err;
3170
3171         return rdev_change_beacon(rdev, dev, &params);
3172 }
3173
3174 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
3175 {
3176         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3177         struct net_device *dev = info->user_ptr[1];
3178
3179         return cfg80211_stop_ap(rdev, dev);
3180 }
3181
3182 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
3183         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
3184         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
3185         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
3186         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
3187         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
3188         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
3189 };
3190
3191 static int parse_station_flags(struct genl_info *info,
3192                                enum nl80211_iftype iftype,
3193                                struct station_parameters *params)
3194 {
3195         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
3196         struct nlattr *nla;
3197         int flag;
3198
3199         /*
3200          * Try parsing the new attribute first so userspace
3201          * can specify both for older kernels.
3202          */
3203         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
3204         if (nla) {
3205                 struct nl80211_sta_flag_update *sta_flags;
3206
3207                 sta_flags = nla_data(nla);
3208                 params->sta_flags_mask = sta_flags->mask;
3209                 params->sta_flags_set = sta_flags->set;
3210                 params->sta_flags_set &= params->sta_flags_mask;
3211                 if ((params->sta_flags_mask |
3212                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
3213                         return -EINVAL;
3214                 return 0;
3215         }
3216
3217         /* if present, parse the old attribute */
3218
3219         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
3220         if (!nla)
3221                 return 0;
3222
3223         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
3224                              nla, sta_flags_policy))
3225                 return -EINVAL;
3226
3227         /*
3228          * Only allow certain flags for interface types so that
3229          * other attributes are silently ignored. Remember that
3230          * this is backward compatibility code with old userspace
3231          * and shouldn't be hit in other cases anyway.
3232          */
3233         switch (iftype) {
3234         case NL80211_IFTYPE_AP:
3235         case NL80211_IFTYPE_AP_VLAN:
3236         case NL80211_IFTYPE_P2P_GO:
3237                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3238                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3239                                          BIT(NL80211_STA_FLAG_WME) |
3240                                          BIT(NL80211_STA_FLAG_MFP);
3241                 break;
3242         case NL80211_IFTYPE_P2P_CLIENT:
3243         case NL80211_IFTYPE_STATION:
3244                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3245                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3246                 break;
3247         case NL80211_IFTYPE_MESH_POINT:
3248                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3249                                          BIT(NL80211_STA_FLAG_MFP) |
3250                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3251         default:
3252                 return -EINVAL;
3253         }
3254
3255         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3256                 if (flags[flag]) {
3257                         params->sta_flags_set |= (1<<flag);
3258
3259                         /* no longer support new API additions in old API */
3260                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3261                                 return -EINVAL;
3262                 }
3263         }
3264
3265         return 0;
3266 }
3267
3268 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3269                                  int attr)
3270 {
3271         struct nlattr *rate;
3272         u32 bitrate;
3273         u16 bitrate_compat;
3274
3275         rate = nla_nest_start(msg, attr);
3276         if (!rate)
3277                 return false;
3278
3279         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3280         bitrate = cfg80211_calculate_bitrate(info);
3281         /* report 16-bit bitrate only if we can */
3282         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3283         if (bitrate > 0 &&
3284             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3285                 return false;
3286         if (bitrate_compat > 0 &&
3287             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3288                 return false;
3289
3290         if (info->flags & RATE_INFO_FLAGS_MCS) {
3291                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3292                         return false;
3293                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3294                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3295                         return false;
3296                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3297                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3298                         return false;
3299         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3300                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3301                         return false;
3302                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3303                         return false;
3304                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3305                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3306                         return false;
3307                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3308                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3309                         return false;
3310                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3311                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3312                         return false;
3313                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3314                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3315                         return false;
3316                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3317                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3318                         return false;
3319         }
3320
3321         nla_nest_end(msg, rate);
3322         return true;
3323 }
3324
3325 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3326                                 int flags,
3327                                 struct cfg80211_registered_device *rdev,
3328                                 struct net_device *dev,
3329                                 const u8 *mac_addr, struct station_info *sinfo)
3330 {
3331         void *hdr;
3332         struct nlattr *sinfoattr, *bss_param;
3333
3334         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3335         if (!hdr)
3336                 return -1;
3337
3338         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3339             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3340             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3341                 goto nla_put_failure;
3342
3343         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3344         if (!sinfoattr)
3345                 goto nla_put_failure;
3346         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3347             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3348                         sinfo->connected_time))
3349                 goto nla_put_failure;
3350         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3351             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3352                         sinfo->inactive_time))
3353                 goto nla_put_failure;
3354         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3355                               STATION_INFO_RX_BYTES64)) &&
3356             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3357                         (u32)sinfo->rx_bytes))
3358                 goto nla_put_failure;
3359         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3360                               NL80211_STA_INFO_TX_BYTES64)) &&
3361             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3362                         (u32)sinfo->tx_bytes))
3363                 goto nla_put_failure;
3364         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3365             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3366                         sinfo->rx_bytes))
3367                 goto nla_put_failure;
3368         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3369             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3370                         sinfo->tx_bytes))
3371                 goto nla_put_failure;
3372         if ((sinfo->filled & STATION_INFO_LLID) &&
3373             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3374                 goto nla_put_failure;
3375         if ((sinfo->filled & STATION_INFO_PLID) &&
3376             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3377                 goto nla_put_failure;
3378         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3379             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3380                        sinfo->plink_state))
3381                 goto nla_put_failure;
3382         switch (rdev->wiphy.signal_type) {
3383         case CFG80211_SIGNAL_TYPE_MBM:
3384                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3385                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3386                                sinfo->signal))
3387                         goto nla_put_failure;
3388                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3389                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3390                                sinfo->signal_avg))
3391                         goto nla_put_failure;
3392                 break;
3393         default:
3394                 break;
3395         }
3396         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3397                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3398                                           NL80211_STA_INFO_TX_BITRATE))
3399                         goto nla_put_failure;
3400         }
3401         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3402                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3403                                           NL80211_STA_INFO_RX_BITRATE))
3404                         goto nla_put_failure;
3405         }
3406         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3407             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3408                         sinfo->rx_packets))
3409                 goto nla_put_failure;
3410         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3411             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3412                         sinfo->tx_packets))
3413                 goto nla_put_failure;
3414         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3415             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3416                         sinfo->tx_retries))
3417                 goto nla_put_failure;
3418         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3419             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3420                         sinfo->tx_failed))
3421                 goto nla_put_failure;
3422         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3423             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3424                         sinfo->beacon_loss_count))
3425                 goto nla_put_failure;
3426         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3427             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3428                         sinfo->local_pm))
3429                 goto nla_put_failure;
3430         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3431             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3432                         sinfo->peer_pm))
3433                 goto nla_put_failure;
3434         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3435             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3436                         sinfo->nonpeer_pm))
3437                 goto nla_put_failure;
3438         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3439                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3440                 if (!bss_param)
3441                         goto nla_put_failure;
3442
3443                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3444                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3445                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3446                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3447                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3448                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3449                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3450                                sinfo->bss_param.dtim_period) ||
3451                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3452                                 sinfo->bss_param.beacon_interval))
3453                         goto nla_put_failure;
3454
3455                 nla_nest_end(msg, bss_param);
3456         }
3457         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3458             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3459                     sizeof(struct nl80211_sta_flag_update),
3460                     &sinfo->sta_flags))
3461                 goto nla_put_failure;
3462         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3463                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3464                             sinfo->t_offset))
3465                 goto nla_put_failure;
3466         nla_nest_end(msg, sinfoattr);
3467
3468         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3469             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3470                     sinfo->assoc_req_ies))
3471                 goto nla_put_failure;
3472
3473         return genlmsg_end(msg, hdr);
3474
3475  nla_put_failure:
3476         genlmsg_cancel(msg, hdr);
3477         return -EMSGSIZE;
3478 }
3479
3480 static int nl80211_dump_station(struct sk_buff *skb,
3481                                 struct netlink_callback *cb)
3482 {
3483         struct station_info sinfo;
3484         struct cfg80211_registered_device *dev;
3485         struct net_device *netdev;
3486         u8 mac_addr[ETH_ALEN];
3487         int sta_idx = cb->args[1];
3488         int err;
3489
3490         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3491         if (err)
3492                 return err;
3493
3494         if (!dev->ops->dump_station) {
3495                 err = -EOPNOTSUPP;
3496                 goto out_err;
3497         }
3498
3499         while (1) {
3500                 memset(&sinfo, 0, sizeof(sinfo));
3501                 err = rdev_dump_station(dev, netdev, sta_idx,
3502                                         mac_addr, &sinfo);
3503                 if (err == -ENOENT)
3504                         break;
3505                 if (err)
3506                         goto out_err;
3507
3508                 if (nl80211_send_station(skb,
3509                                 NETLINK_CB(cb->skb).portid,
3510                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3511                                 dev, netdev, mac_addr,
3512                                 &sinfo) < 0)
3513                         goto out;
3514
3515                 sta_idx++;
3516         }
3517
3518
3519  out:
3520         cb->args[1] = sta_idx;
3521         err = skb->len;
3522  out_err:
3523         nl80211_finish_netdev_dump(dev);
3524
3525         return err;
3526 }
3527
3528 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3529 {
3530         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3531         struct net_device *dev = info->user_ptr[1];
3532         struct station_info sinfo;
3533         struct sk_buff *msg;
3534         u8 *mac_addr = NULL;
3535         int err;
3536
3537         memset(&sinfo, 0, sizeof(sinfo));
3538
3539         if (!info->attrs[NL80211_ATTR_MAC])
3540                 return -EINVAL;
3541
3542         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3543
3544         if (!rdev->ops->get_station)
3545                 return -EOPNOTSUPP;
3546
3547         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3548         if (err)
3549                 return err;
3550
3551         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3552         if (!msg)
3553                 return -ENOMEM;
3554
3555         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3556                                  rdev, dev, mac_addr, &sinfo) < 0) {
3557                 nlmsg_free(msg);
3558                 return -ENOBUFS;
3559         }
3560
3561         return genlmsg_reply(msg, info);
3562 }
3563
3564 int cfg80211_check_station_change(struct wiphy *wiphy,
3565                                   struct station_parameters *params,
3566                                   enum cfg80211_station_type statype)
3567 {
3568         if (params->listen_interval != -1)
3569                 return -EINVAL;
3570         if (params->aid)
3571                 return -EINVAL;
3572
3573         /* When you run into this, adjust the code below for the new flag */
3574         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3575
3576         switch (statype) {
3577         case CFG80211_STA_MESH_PEER_NONSEC:
3578         case CFG80211_STA_MESH_PEER_SECURE:
3579                 /*
3580                  * No ignoring the TDLS flag here -- the userspace mesh
3581                  * code doesn't have the bug of including TDLS in the
3582                  * mask everywhere.
3583                  */
3584                 if (params->sta_flags_mask &
3585                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3586                                   BIT(NL80211_STA_FLAG_MFP) |
3587                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3588                         return -EINVAL;
3589                 break;
3590         case CFG80211_STA_TDLS_PEER_SETUP:
3591         case CFG80211_STA_TDLS_PEER_ACTIVE:
3592                 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3593                         return -EINVAL;
3594                 /* ignore since it can't change */
3595                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3596                 break;
3597         default:
3598                 /* disallow mesh-specific things */
3599                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3600                         return -EINVAL;
3601                 if (params->local_pm)
3602                         return -EINVAL;
3603                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3604                         return -EINVAL;
3605         }
3606
3607         if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
3608             statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
3609                 /* TDLS can't be set, ... */
3610                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3611                         return -EINVAL;
3612                 /*
3613                  * ... but don't bother the driver with it. This works around
3614                  * a hostapd/wpa_supplicant issue -- it always includes the
3615                  * TLDS_PEER flag in the mask even for AP mode.
3616                  */
3617                 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3618         }
3619
3620         if (statype != CFG80211_STA_TDLS_PEER_SETUP) {
3621                 /* reject other things that can't change */
3622                 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
3623                         return -EINVAL;
3624                 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
3625                         return -EINVAL;
3626                 if (params->supported_rates)
3627                         return -EINVAL;
3628                 if (params->ext_capab || params->ht_capa || params->vht_capa)
3629                         return -EINVAL;
3630         }
3631
3632         if (statype != CFG80211_STA_AP_CLIENT) {
3633                 if (params->vlan)
3634                         return -EINVAL;
3635         }
3636
3637         switch (statype) {
3638         case CFG80211_STA_AP_MLME_CLIENT:
3639                 /* Use this only for authorizing/unauthorizing a station */
3640                 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
3641                         return -EOPNOTSUPP;
3642                 break;
3643         case CFG80211_STA_AP_CLIENT:
3644                 /* accept only the listed bits */
3645                 if (params->sta_flags_mask &
3646                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3647                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3648                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3649                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3650                                   BIT(NL80211_STA_FLAG_WME) |
3651                                   BIT(NL80211_STA_FLAG_MFP)))
3652                         return -EINVAL;
3653
3654                 /* but authenticated/associated only if driver handles it */
3655                 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3656                     params->sta_flags_mask &
3657                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3658                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3659                         return -EINVAL;
3660                 break;
3661         case CFG80211_STA_IBSS:
3662         case CFG80211_STA_AP_STA:
3663                 /* reject any changes other than AUTHORIZED */
3664                 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3665                         return -EINVAL;
3666                 break;
3667         case CFG80211_STA_TDLS_PEER_SETUP:
3668                 /* reject any changes other than AUTHORIZED or WME */
3669                 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3670                                                BIT(NL80211_STA_FLAG_WME)))
3671                         return -EINVAL;
3672                 /* force (at least) rates when authorizing */
3673                 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
3674                     !params->supported_rates)
3675                         return -EINVAL;
3676                 break;
3677         case CFG80211_STA_TDLS_PEER_ACTIVE:
3678                 /* reject any changes */
3679                 return -EINVAL;
3680         case CFG80211_STA_MESH_PEER_NONSEC:
3681                 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
3682                         return -EINVAL;
3683                 break;
3684         case CFG80211_STA_MESH_PEER_SECURE:
3685                 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
3686                         return -EINVAL;
3687                 break;
3688         }
3689
3690         return 0;
3691 }
3692 EXPORT_SYMBOL(cfg80211_check_station_change);
3693
3694 /*
3695  * Get vlan interface making sure it is running and on the right wiphy.
3696  */
3697 static struct net_device *get_vlan(struct genl_info *info,
3698                                    struct cfg80211_registered_device *rdev)
3699 {
3700         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3701         struct net_device *v;
3702         int ret;
3703
3704         if (!vlanattr)
3705                 return NULL;
3706
3707         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3708         if (!v)
3709                 return ERR_PTR(-ENODEV);
3710
3711         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3712                 ret = -EINVAL;
3713                 goto error;
3714         }
3715
3716         if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3717             v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3718             v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
3719                 ret = -EINVAL;
3720                 goto error;
3721         }
3722
3723         if (!netif_running(v)) {
3724                 ret = -ENETDOWN;
3725                 goto error;
3726         }
3727
3728         return v;
3729  error:
3730         dev_put(v);
3731         return ERR_PTR(ret);
3732 }
3733
3734 static struct nla_policy
3735 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3736         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3737         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3738 };
3739
3740 static int nl80211_parse_sta_wme(struct genl_info *info,
3741                                  struct station_parameters *params)
3742 {
3743         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3744         struct nlattr *nla;
3745         int err;
3746
3747         /* parse WME attributes if present */
3748         if (!info->attrs[NL80211_ATTR_STA_WME])
3749                 return 0;
3750
3751         nla = info->attrs[NL80211_ATTR_STA_WME];
3752         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3753                                nl80211_sta_wme_policy);
3754         if (err)
3755                 return err;
3756
3757         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3758                 params->uapsd_queues = nla_get_u8(
3759                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3760         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3761                 return -EINVAL;
3762
3763         if (tb[NL80211_STA_WME_MAX_SP])
3764                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3765
3766         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3767                 return -EINVAL;
3768
3769         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3770
3771         return 0;
3772 }
3773
3774 static int nl80211_set_station_tdls(struct genl_info *info,
3775                                     struct station_parameters *params)
3776 {
3777         /* Dummy STA entry gets updated once the peer capabilities are known */
3778         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3779                 params->ht_capa =
3780                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3781         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3782                 params->vht_capa =
3783                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3784
3785         return nl80211_parse_sta_wme(info, params);
3786 }
3787
3788 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3789 {
3790         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3791         struct net_device *dev = info->user_ptr[1];
3792         struct station_parameters params;
3793         u8 *mac_addr;
3794         int err;
3795
3796         memset(&params, 0, sizeof(params));
3797
3798         params.listen_interval = -1;
3799
3800         if (!rdev->ops->change_station)
3801                 return -EOPNOTSUPP;
3802
3803         if (info->attrs[NL80211_ATTR_STA_AID])
3804                 return -EINVAL;
3805
3806         if (!info->attrs[NL80211_ATTR_MAC])
3807                 return -EINVAL;
3808
3809         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3810
3811         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3812                 params.supported_rates =
3813                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3814                 params.supported_rates_len =
3815                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3816         }
3817
3818         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3819                 params.capability =
3820                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3821                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3822         }
3823
3824         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3825                 params.ext_capab =
3826                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3827                 params.ext_capab_len =
3828                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3829         }
3830
3831         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3832                 return -EINVAL;
3833
3834         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3835                 return -EINVAL;
3836
3837         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3838                 params.plink_action =
3839                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3840                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3841                         return -EINVAL;
3842         }
3843
3844         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
3845                 params.plink_state =
3846                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3847                 if (params.plink_state >= NUM_NL80211_PLINK_STATES)
3848                         return -EINVAL;
3849                 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
3850         }
3851
3852         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3853                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3854                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3855
3856                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3857                     pm > NL80211_MESH_POWER_MAX)
3858                         return -EINVAL;
3859
3860                 params.local_pm = pm;
3861         }
3862
3863         /* Include parameters for TDLS peer (will check later) */
3864         err = nl80211_set_station_tdls(info, &params);
3865         if (err)
3866                 return err;
3867
3868         params.vlan = get_vlan(info, rdev);
3869         if (IS_ERR(params.vlan))
3870                 return PTR_ERR(params.vlan);
3871
3872         switch (dev->ieee80211_ptr->iftype) {
3873         case NL80211_IFTYPE_AP:
3874         case NL80211_IFTYPE_AP_VLAN:
3875         case NL80211_IFTYPE_P2P_GO:
3876         case NL80211_IFTYPE_P2P_CLIENT:
3877         case NL80211_IFTYPE_STATION:
3878         case NL80211_IFTYPE_ADHOC:
3879         case NL80211_IFTYPE_MESH_POINT:
3880                 break;
3881         default:
3882                 err = -EOPNOTSUPP;
3883                 goto out_put_vlan;
3884         }
3885
3886         /* driver will call cfg80211_check_station_change() */
3887         err = rdev_change_station(rdev, dev, mac_addr, &params);
3888
3889  out_put_vlan:
3890         if (params.vlan)
3891                 dev_put(params.vlan);
3892
3893         return err;
3894 }
3895
3896 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3897 {
3898         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3899         int err;
3900         struct net_device *dev = info->user_ptr[1];
3901         struct station_parameters params;
3902         u8 *mac_addr = NULL;
3903
3904         memset(&params, 0, sizeof(params));
3905
3906         if (!rdev->ops->add_station)
3907                 return -EOPNOTSUPP;
3908
3909         if (!info->attrs[NL80211_ATTR_MAC])
3910                 return -EINVAL;
3911
3912         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3913                 return -EINVAL;
3914
3915         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3916                 return -EINVAL;
3917
3918         if (!info->attrs[NL80211_ATTR_STA_AID])
3919                 return -EINVAL;
3920
3921         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3922         params.supported_rates =
3923                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3924         params.supported_rates_len =
3925                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3926         params.listen_interval =
3927                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3928
3929         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3930         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3931                 return -EINVAL;
3932
3933         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3934                 params.capability =
3935                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3936                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3937         }
3938
3939         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3940                 params.ext_capab =
3941                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3942                 params.ext_capab_len =
3943                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3944         }
3945
3946         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3947                 params.ht_capa =
3948                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3949
3950         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3951                 params.vht_capa =
3952                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3953
3954         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) {
3955                 params.plink_action =
3956                         nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3957                 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS)
3958                         return -EINVAL;
3959         }
3960
3961         err = nl80211_parse_sta_wme(info, &params);
3962         if (err)
3963                 return err;
3964
3965         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3966                 return -EINVAL;
3967
3968         /* When you run into this, adjust the code below for the new flag */
3969         BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
3970
3971         switch (dev->ieee80211_ptr->iftype) {
3972         case NL80211_IFTYPE_AP:
3973         case NL80211_IFTYPE_AP_VLAN:
3974         case NL80211_IFTYPE_P2P_GO:
3975                 /* ignore WME attributes if iface/sta is not capable */
3976                 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
3977                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
3978                         params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
3979
3980                 /* TDLS peers cannot be added */
3981                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3982                         return -EINVAL;
3983                 /* but don't bother the driver with it */
3984                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3985
3986                 /* allow authenticated/associated only if driver handles it */
3987                 if (!(rdev->wiphy.features &
3988                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3989                     params.sta_flags_mask &
3990                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3991                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3992                         return -EINVAL;
3993
3994                 /* must be last in here for error handling */
3995                 params.vlan = get_vlan(info, rdev);
3996                 if (IS_ERR(params.vlan))
3997                         return PTR_ERR(params.vlan);
3998                 break;
3999         case NL80211_IFTYPE_MESH_POINT:
4000                 /* ignore uAPSD data */
4001                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4002
4003                 /* associated is disallowed */
4004                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
4005                         return -EINVAL;
4006                 /* TDLS peers cannot be added */
4007                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
4008                         return -EINVAL;
4009                 break;
4010         case NL80211_IFTYPE_STATION:
4011                 /* ignore uAPSD data */
4012                 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;
4013
4014                 /* these are disallowed */
4015                 if (params.sta_flags_mask &
4016                                 (BIT(NL80211_STA_FLAG_ASSOCIATED) |
4017                                  BIT(NL80211_STA_FLAG_AUTHENTICATED)))
4018                         return -EINVAL;
4019                 /* Only TDLS peers can be added */
4020                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
4021                         return -EINVAL;
4022                 /* Can only add if TDLS ... */
4023                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
4024                         return -EOPNOTSUPP;
4025                 /* ... with external setup is supported */
4026                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
4027                         return -EOPNOTSUPP;
4028                 /*
4029                  * Older wpa_supplicant versions always mark the TDLS peer
4030                  * as authorized, but it shouldn't yet be.
4031                  */
4032                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
4033                 break;
4034         default:
4035                 return -EOPNOTSUPP;
4036         }
4037
4038         /* be aware of params.vlan when changing code here */
4039
4040         err = rdev_add_station(rdev, dev, mac_addr, &params);
4041
4042         if (params.vlan)
4043                 dev_put(params.vlan);
4044         return err;
4045 }
4046
4047 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
4048 {
4049         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4050         struct net_device *dev = info->user_ptr[1];
4051         u8 *mac_addr = NULL;
4052
4053         if (info->attrs[NL80211_ATTR_MAC])
4054                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
4055
4056         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4057             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4058             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4059             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4060                 return -EINVAL;
4061
4062         if (!rdev->ops->del_station)
4063                 return -EOPNOTSUPP;
4064
4065         return rdev_del_station(rdev, dev, mac_addr);
4066 }
4067
4068 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
4069                                 int flags, struct net_device *dev,
4070                                 u8 *dst, u8 *next_hop,
4071                                 struct mpath_info *pinfo)
4072 {
4073         void *hdr;
4074         struct nlattr *pinfoattr;
4075
4076         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
4077         if (!hdr)
4078                 return -1;
4079
4080         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4081             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
4082             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
4083             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
4084                 goto nla_put_failure;
4085
4086         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
4087         if (!pinfoattr)
4088                 goto nla_put_failure;
4089         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
4090             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
4091                         pinfo->frame_qlen))
4092                 goto nla_put_failure;
4093         if (((pinfo->filled & MPATH_INFO_SN) &&
4094              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
4095             ((pinfo->filled & MPATH_INFO_METRIC) &&
4096              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
4097                          pinfo->metric)) ||
4098             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
4099              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
4100                          pinfo->exptime)) ||
4101             ((pinfo->filled & MPATH_INFO_FLAGS) &&
4102              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
4103                         pinfo->flags)) ||
4104             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
4105              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
4106                          pinfo->discovery_timeout)) ||
4107             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
4108              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
4109                         pinfo->discovery_retries)))
4110                 goto nla_put_failure;
4111
4112         nla_nest_end(msg, pinfoattr);
4113
4114         return genlmsg_end(msg, hdr);
4115
4116  nla_put_failure:
4117         genlmsg_cancel(msg, hdr);
4118         return -EMSGSIZE;
4119 }
4120
4121 static int nl80211_dump_mpath(struct sk_buff *skb,
4122                               struct netlink_callback *cb)
4123 {
4124         struct mpath_info pinfo;
4125         struct cfg80211_registered_device *dev;
4126         struct net_device *netdev;
4127         u8 dst[ETH_ALEN];
4128         u8 next_hop[ETH_ALEN];
4129         int path_idx = cb->args[1];
4130         int err;
4131
4132         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4133         if (err)
4134                 return err;
4135
4136         if (!dev->ops->dump_mpath) {
4137                 err = -EOPNOTSUPP;
4138                 goto out_err;
4139         }
4140
4141         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
4142                 err = -EOPNOTSUPP;
4143                 goto out_err;
4144         }
4145
4146         while (1) {
4147                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
4148                                       &pinfo);
4149                 if (err == -ENOENT)
4150                         break;
4151                 if (err)
4152                         goto out_err;
4153
4154                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
4155                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
4156                                        netdev, dst, next_hop,
4157                                        &pinfo) < 0)
4158                         goto out;
4159
4160                 path_idx++;
4161         }
4162
4163
4164  out:
4165         cb->args[1] = path_idx;
4166         err = skb->len;
4167  out_err:
4168         nl80211_finish_netdev_dump(dev);
4169         return err;
4170 }
4171
4172 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
4173 {
4174         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4175         int err;
4176         struct net_device *dev = info->user_ptr[1];
4177         struct mpath_info pinfo;
4178         struct sk_buff *msg;
4179         u8 *dst = NULL;
4180         u8 next_hop[ETH_ALEN];
4181
4182         memset(&pinfo, 0, sizeof(pinfo));
4183
4184         if (!info->attrs[NL80211_ATTR_MAC])
4185                 return -EINVAL;
4186
4187         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4188
4189         if (!rdev->ops->get_mpath)
4190                 return -EOPNOTSUPP;
4191
4192         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4193                 return -EOPNOTSUPP;
4194
4195         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
4196         if (err)
4197                 return err;
4198
4199         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4200         if (!msg)
4201                 return -ENOMEM;
4202
4203         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
4204                                  dev, dst, next_hop, &pinfo) < 0) {
4205                 nlmsg_free(msg);
4206                 return -ENOBUFS;
4207         }
4208
4209         return genlmsg_reply(msg, info);
4210 }
4211
4212 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
4213 {
4214         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4215         struct net_device *dev = info->user_ptr[1];
4216         u8 *dst = NULL;
4217         u8 *next_hop = NULL;
4218
4219         if (!info->attrs[NL80211_ATTR_MAC])
4220                 return -EINVAL;
4221
4222         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4223                 return -EINVAL;
4224
4225         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4226         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4227
4228         if (!rdev->ops->change_mpath)
4229                 return -EOPNOTSUPP;
4230
4231         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4232                 return -EOPNOTSUPP;
4233
4234         return rdev_change_mpath(rdev, dev, dst, next_hop);
4235 }
4236
4237 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
4238 {
4239         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4240         struct net_device *dev = info->user_ptr[1];
4241         u8 *dst = NULL;
4242         u8 *next_hop = NULL;
4243
4244         if (!info->attrs[NL80211_ATTR_MAC])
4245                 return -EINVAL;
4246
4247         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
4248                 return -EINVAL;
4249
4250         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4251         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
4252
4253         if (!rdev->ops->add_mpath)
4254                 return -EOPNOTSUPP;
4255
4256         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
4257                 return -EOPNOTSUPP;
4258
4259         return rdev_add_mpath(rdev, dev, dst, next_hop);
4260 }
4261
4262 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
4263 {
4264         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4265         struct net_device *dev = info->user_ptr[1];
4266         u8 *dst = NULL;
4267
4268         if (info->attrs[NL80211_ATTR_MAC])
4269                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
4270
4271         if (!rdev->ops->del_mpath)
4272                 return -EOPNOTSUPP;
4273
4274         return rdev_del_mpath(rdev, dev, dst);
4275 }
4276
4277 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
4278 {
4279         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4280         struct net_device *dev = info->user_ptr[1];
4281         struct bss_parameters params;
4282
4283         memset(&params, 0, sizeof(params));
4284         /* default to not changing parameters */
4285         params.use_cts_prot = -1;
4286         params.use_short_preamble = -1;
4287         params.use_short_slot_time = -1;
4288         params.ap_isolate = -1;
4289         params.ht_opmode = -1;
4290         params.p2p_ctwindow = -1;
4291         params.p2p_opp_ps = -1;
4292
4293         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4294                 params.use_cts_prot =
4295                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4296         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4297                 params.use_short_preamble =
4298                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4299         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4300                 params.use_short_slot_time =
4301                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4302         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4303                 params.basic_rates =
4304                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4305                 params.basic_rates_len =
4306                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4307         }
4308         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4309                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4310         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4311                 params.ht_opmode =
4312                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4313
4314         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4315                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4316                         return -EINVAL;
4317                 params.p2p_ctwindow =
4318                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4319                 if (params.p2p_ctwindow < 0)
4320                         return -EINVAL;
4321                 if (params.p2p_ctwindow != 0 &&
4322                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4323                         return -EINVAL;
4324         }
4325
4326         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4327                 u8 tmp;
4328
4329                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4330                         return -EINVAL;
4331                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4332                 if (tmp > 1)
4333                         return -EINVAL;
4334                 params.p2p_opp_ps = tmp;
4335                 if (params.p2p_opp_ps &&
4336                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4337                         return -EINVAL;
4338         }
4339
4340         if (!rdev->ops->change_bss)
4341                 return -EOPNOTSUPP;
4342
4343         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4344             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4345                 return -EOPNOTSUPP;
4346
4347         return rdev_change_bss(rdev, dev, &params);
4348 }
4349
4350 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4351         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4352         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4353         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4354         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4355         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4356         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4357 };
4358
4359 static int parse_reg_rule(struct nlattr *tb[],
4360         struct ieee80211_reg_rule *reg_rule)
4361 {
4362         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4363         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4364
4365         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4366                 return -EINVAL;
4367         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4368                 return -EINVAL;
4369         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4370                 return -EINVAL;
4371         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4372                 return -EINVAL;
4373         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4374                 return -EINVAL;
4375
4376         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4377
4378         freq_range->start_freq_khz =
4379                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4380         freq_range->end_freq_khz =
4381                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4382         freq_range->max_bandwidth_khz =
4383                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4384
4385         power_rule->max_eirp =
4386                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4387
4388         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4389                 power_rule->max_antenna_gain =
4390                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4391
4392         return 0;
4393 }
4394
4395 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4396 {
4397         int r;
4398         char *data = NULL;
4399         enum nl80211_user_reg_hint_type user_reg_hint_type;
4400
4401         /*
4402          * You should only get this when cfg80211 hasn't yet initialized
4403          * completely when built-in to the kernel right between the time
4404          * window between nl80211_init() and regulatory_init(), if that is
4405          * even possible.
4406          */
4407         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4408                 return -EINPROGRESS;
4409
4410         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4411                 return -EINVAL;
4412
4413         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4414
4415         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4416                 user_reg_hint_type =
4417                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4418         else
4419                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4420
4421         switch (user_reg_hint_type) {
4422         case NL80211_USER_REG_HINT_USER:
4423         case NL80211_USER_REG_HINT_CELL_BASE:
4424                 break;
4425         default:
4426                 return -EINVAL;
4427         }
4428
4429         r = regulatory_hint_user(data, user_reg_hint_type);
4430
4431         return r;
4432 }
4433
4434 static int nl80211_get_mesh_config(struct sk_buff *skb,
4435                                    struct genl_info *info)
4436 {
4437         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4438         struct net_device *dev = info->user_ptr[1];
4439         struct wireless_dev *wdev = dev->ieee80211_ptr;
4440         struct mesh_config cur_params;
4441         int err = 0;
4442         void *hdr;
4443         struct nlattr *pinfoattr;
4444         struct sk_buff *msg;
4445
4446         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4447                 return -EOPNOTSUPP;
4448
4449         if (!rdev->ops->get_mesh_config)
4450                 return -EOPNOTSUPP;
4451
4452         wdev_lock(wdev);
4453         /* If not connected, get default parameters */
4454         if (!wdev->mesh_id_len)
4455                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4456         else
4457                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4458         wdev_unlock(wdev);
4459
4460         if (err)
4461                 return err;
4462
4463         /* Draw up a netlink message to send back */
4464         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4465         if (!msg)
4466                 return -ENOMEM;
4467         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4468                              NL80211_CMD_GET_MESH_CONFIG);
4469         if (!hdr)
4470                 goto out;
4471         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4472         if (!pinfoattr)
4473                 goto nla_put_failure;
4474         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4475             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4476                         cur_params.dot11MeshRetryTimeout) ||
4477             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4478                         cur_params.dot11MeshConfirmTimeout) ||
4479             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4480                         cur_params.dot11MeshHoldingTimeout) ||
4481             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4482                         cur_params.dot11MeshMaxPeerLinks) ||
4483             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4484                        cur_params.dot11MeshMaxRetries) ||
4485             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4486                        cur_params.dot11MeshTTL) ||
4487             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4488                        cur_params.element_ttl) ||
4489             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4490                        cur_params.auto_open_plinks) ||
4491             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4492                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4493             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4494                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4495             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4496                         cur_params.path_refresh_time) ||
4497             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4498                         cur_params.min_discovery_timeout) ||
4499             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4500                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4501             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4502                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4503             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4504                         cur_params.dot11MeshHWMPperrMinInterval) ||
4505             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4506                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4507             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4508                        cur_params.dot11MeshHWMPRootMode) ||
4509             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4510                         cur_params.dot11MeshHWMPRannInterval) ||
4511             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4512                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4513             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4514                        cur_params.dot11MeshForwarding) ||
4515             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4516                         cur_params.rssi_threshold) ||
4517             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4518                         cur_params.ht_opmode) ||
4519             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4520                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4521             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4522                         cur_params.dot11MeshHWMProotInterval) ||
4523             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4524                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4525             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4526                         cur_params.power_mode) ||
4527             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4528                         cur_params.dot11MeshAwakeWindowDuration))
4529                 goto nla_put_failure;
4530         nla_nest_end(msg, pinfoattr);
4531         genlmsg_end(msg, hdr);
4532         return genlmsg_reply(msg, info);
4533
4534  nla_put_failure:
4535         genlmsg_cancel(msg, hdr);
4536  out:
4537         nlmsg_free(msg);
4538         return -ENOBUFS;
4539 }
4540
4541 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4542         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4543         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4544         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4545         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4546         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4547         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4548         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4549         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4550         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4551         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4552         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4553         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4554         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4555         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4556         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4557         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4558         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4559         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4560         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4561         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4562         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4563         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4564         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4565         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4566         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4567         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4568         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4569 };
4570
4571 static const struct nla_policy
4572         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4573         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4574         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4575         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4576         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4577         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4578                                     .len = IEEE80211_MAX_DATA_LEN },
4579         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4580 };
4581
4582 static int nl80211_parse_mesh_config(struct genl_info *info,
4583                                      struct mesh_config *cfg,
4584                                      u32 *mask_out)
4585 {
4586         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4587         u32 mask = 0;
4588
4589 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4590 do {                                                                        \
4591         if (tb[attr]) {                                                     \
4592                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4593                         return -EINVAL;                                     \
4594                 cfg->param = fn(tb[attr]);                                  \
4595                 mask |= (1 << (attr - 1));                                  \
4596         }                                                                   \
4597 } while (0)
4598
4599
4600         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4601                 return -EINVAL;
4602         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4603                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4604                              nl80211_meshconf_params_policy))
4605                 return -EINVAL;
4606
4607         /* This makes sure that there aren't more than 32 mesh config
4608          * parameters (otherwise our bitfield scheme would not work.) */
4609         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4610
4611         /* Fill in the params struct */
4612         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4613                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4614                                   nla_get_u16);
4615         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4616                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4617                                   nla_get_u16);
4618         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4619                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4620                                   nla_get_u16);
4621         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4622                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4623                                   nla_get_u16);
4624         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4625                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4626                                   nla_get_u8);
4627         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4628                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4629         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4630                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4631                                   nla_get_u8);
4632         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4633                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4634                                   nla_get_u8);
4635         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4636                                   1, 255, mask,
4637                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4638                                   nla_get_u32);
4639         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4640                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4641                                   nla_get_u8);
4642         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4643                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4644                                   nla_get_u32);
4645         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4646                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4647                                   nla_get_u16);
4648         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4649                                   1, 65535, mask,
4650                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4651                                   nla_get_u32);
4652         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4653                                   1, 65535, mask,
4654                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4655                                   nla_get_u16);
4656         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4657                                   1, 65535, mask,
4658                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4659                                   nla_get_u16);
4660         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4661                                   dot11MeshHWMPnetDiameterTraversalTime,
4662                                   1, 65535, mask,
4663                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4664                                   nla_get_u16);
4665         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4666                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4667                                   nla_get_u8);
4668         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4669                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4670                                   nla_get_u16);
4671         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4672                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4673                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4674                                   nla_get_u8);
4675         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4676                                   mask, NL80211_MESHCONF_FORWARDING,
4677                                   nla_get_u8);
4678         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4679                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4680                                   nla_get_u32);
4681         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4682                                   mask, NL80211_MESHCONF_HT_OPMODE,
4683                                   nla_get_u16);
4684         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4685                                   1, 65535, mask,
4686                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4687                                   nla_get_u32);
4688         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4689                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4690                                   nla_get_u16);
4691         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4692                                   dot11MeshHWMPconfirmationInterval,
4693                                   1, 65535, mask,
4694                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4695                                   nla_get_u16);
4696         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4697                                   NL80211_MESH_POWER_ACTIVE,
4698                                   NL80211_MESH_POWER_MAX,
4699                                   mask, NL80211_MESHCONF_POWER_MODE,
4700                                   nla_get_u32);
4701         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4702                                   0, 65535, mask,
4703                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4704         if (mask_out)
4705                 *mask_out = mask;
4706
4707         return 0;
4708
4709 #undef FILL_IN_MESH_PARAM_IF_SET
4710 }
4711
4712 static int nl80211_parse_mesh_setup(struct genl_info *info,
4713                                      struct mesh_setup *setup)
4714 {
4715         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4716
4717         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4718                 return -EINVAL;
4719         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4720                              info->attrs[NL80211_ATTR_MESH_SETUP],
4721                              nl80211_mesh_setup_params_policy))
4722                 return -EINVAL;
4723
4724         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4725                 setup->sync_method =
4726                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4727                  IEEE80211_SYNC_METHOD_VENDOR :
4728                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4729
4730         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4731                 setup->path_sel_proto =
4732                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4733                  IEEE80211_PATH_PROTOCOL_VENDOR :
4734                  IEEE80211_PATH_PROTOCOL_HWMP;
4735
4736         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4737                 setup->path_metric =
4738                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4739                  IEEE80211_PATH_METRIC_VENDOR :
4740                  IEEE80211_PATH_METRIC_AIRTIME;
4741
4742
4743         if (tb[NL80211_MESH_SETUP_IE]) {
4744                 struct nlattr *ieattr =
4745                         tb[NL80211_MESH_SETUP_IE];
4746                 if (!is_valid_ie_attr(ieattr))
4747                         return -EINVAL;
4748                 setup->ie = nla_data(ieattr);
4749                 setup->ie_len = nla_len(ieattr);
4750         }
4751         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4752         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4753
4754         return 0;
4755 }
4756
4757 static int nl80211_update_mesh_config(struct sk_buff *skb,
4758                                       struct genl_info *info)
4759 {
4760         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4761         struct net_device *dev = info->user_ptr[1];
4762         struct wireless_dev *wdev = dev->ieee80211_ptr;
4763         struct mesh_config cfg;
4764         u32 mask;
4765         int err;
4766
4767         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4768                 return -EOPNOTSUPP;
4769
4770         if (!rdev->ops->update_mesh_config)
4771                 return -EOPNOTSUPP;
4772
4773         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4774         if (err)
4775                 return err;
4776
4777         wdev_lock(wdev);
4778         if (!wdev->mesh_id_len)
4779                 err = -ENOLINK;
4780
4781         if (!err)
4782                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4783
4784         wdev_unlock(wdev);
4785
4786         return err;
4787 }
4788
4789 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4790 {
4791         const struct ieee80211_regdomain *regdom;
4792         struct sk_buff *msg;
4793         void *hdr = NULL;
4794         struct nlattr *nl_reg_rules;
4795         unsigned int i;
4796         int err = -EINVAL;
4797
4798         mutex_lock(&cfg80211_mutex);
4799
4800         if (!cfg80211_regdomain)
4801                 goto out;
4802
4803         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4804         if (!msg) {
4805                 err = -ENOBUFS;
4806                 goto out;
4807         }
4808
4809         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4810                              NL80211_CMD_GET_REG);
4811         if (!hdr)
4812                 goto put_failure;
4813
4814         if (reg_last_request_cell_base() &&
4815             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4816                         NL80211_USER_REG_HINT_CELL_BASE))
4817                 goto nla_put_failure;
4818
4819         rcu_read_lock();
4820         regdom = rcu_dereference(cfg80211_regdomain);
4821
4822         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4823             (regdom->dfs_region &&
4824              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4825                 goto nla_put_failure_rcu;
4826
4827         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4828         if (!nl_reg_rules)
4829                 goto nla_put_failure_rcu;
4830
4831         for (i = 0; i < regdom->n_reg_rules; i++) {
4832                 struct nlattr *nl_reg_rule;
4833                 const struct ieee80211_reg_rule *reg_rule;
4834                 const struct ieee80211_freq_range *freq_range;
4835                 const struct ieee80211_power_rule *power_rule;
4836
4837                 reg_rule = &regdom->reg_rules[i];
4838                 freq_range = &reg_rule->freq_range;
4839                 power_rule = &reg_rule->power_rule;
4840
4841                 nl_reg_rule = nla_nest_start(msg, i);
4842                 if (!nl_reg_rule)
4843                         goto nla_put_failure_rcu;
4844
4845                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4846                                 reg_rule->flags) ||
4847                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4848                                 freq_range->start_freq_khz) ||
4849                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4850                                 freq_range->end_freq_khz) ||
4851                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4852                                 freq_range->max_bandwidth_khz) ||
4853                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4854                                 power_rule->max_antenna_gain) ||
4855                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4856                                 power_rule->max_eirp))
4857                         goto nla_put_failure_rcu;
4858
4859                 nla_nest_end(msg, nl_reg_rule);
4860         }
4861         rcu_read_unlock();
4862
4863         nla_nest_end(msg, nl_reg_rules);
4864
4865         genlmsg_end(msg, hdr);
4866         err = genlmsg_reply(msg, info);
4867         goto out;
4868
4869 nla_put_failure_rcu:
4870         rcu_read_unlock();
4871 nla_put_failure:
4872         genlmsg_cancel(msg, hdr);
4873 put_failure:
4874         nlmsg_free(msg);
4875         err = -EMSGSIZE;
4876 out:
4877         mutex_unlock(&cfg80211_mutex);
4878         return err;
4879 }
4880
4881 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4882 {
4883         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4884         struct nlattr *nl_reg_rule;
4885         char *alpha2 = NULL;
4886         int rem_reg_rules = 0, r = 0;
4887         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4888         u8 dfs_region = 0;
4889         struct ieee80211_regdomain *rd = NULL;
4890
4891         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4892                 return -EINVAL;
4893
4894         if (!info->attrs[NL80211_ATTR_REG_RULES])
4895                 return -EINVAL;
4896
4897         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4898
4899         if (info->attrs[NL80211_ATTR_DFS_REGION])
4900                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4901
4902         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4903                             rem_reg_rules) {
4904                 num_rules++;
4905                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4906                         return -EINVAL;
4907         }
4908
4909         size_of_regd = sizeof(struct ieee80211_regdomain) +
4910                        num_rules * sizeof(struct ieee80211_reg_rule);
4911
4912         rd = kzalloc(size_of_regd, GFP_KERNEL);
4913         if (!rd)
4914                 return -ENOMEM;
4915
4916         rd->n_reg_rules = num_rules;
4917         rd->alpha2[0] = alpha2[0];
4918         rd->alpha2[1] = alpha2[1];
4919
4920         /*
4921          * Disable DFS master mode if the DFS region was
4922          * not supported or known on this kernel.
4923          */
4924         if (reg_supported_dfs_region(dfs_region))
4925                 rd->dfs_region = dfs_region;
4926
4927         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4928                             rem_reg_rules) {
4929                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4930                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4931                           reg_rule_policy);
4932                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4933                 if (r)
4934                         goto bad_reg;
4935
4936                 rule_idx++;
4937
4938                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4939                         r = -EINVAL;
4940                         goto bad_reg;
4941                 }
4942         }
4943
4944         mutex_lock(&cfg80211_mutex);
4945
4946         r = set_regdom(rd);
4947         /* set_regdom took ownership */
4948         rd = NULL;
4949         mutex_unlock(&cfg80211_mutex);
4950
4951  bad_reg:
4952         kfree(rd);
4953         return r;
4954 }
4955
4956 static int validate_scan_freqs(struct nlattr *freqs)
4957 {
4958         struct nlattr *attr1, *attr2;
4959         int n_channels = 0, tmp1, tmp2;
4960
4961         nla_for_each_nested(attr1, freqs, tmp1) {
4962                 n_channels++;
4963                 /*
4964                  * Some hardware has a limited channel list for
4965                  * scanning, and it is pretty much nonsensical
4966                  * to scan for a channel twice, so disallow that
4967                  * and don't require drivers to check that the
4968                  * channel list they get isn't longer than what
4969                  * they can scan, as long as they can scan all
4970                  * the channels they registered at once.
4971                  */
4972                 nla_for_each_nested(attr2, freqs, tmp2)
4973                         if (attr1 != attr2 &&
4974                             nla_get_u32(attr1) == nla_get_u32(attr2))
4975                                 return 0;
4976         }
4977
4978         return n_channels;
4979 }
4980
4981 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4982 {
4983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4984         struct wireless_dev *wdev = info->user_ptr[1];
4985         struct cfg80211_scan_request *request;
4986         struct nlattr *attr;
4987         struct wiphy *wiphy;
4988         int err, tmp, n_ssids = 0, n_channels, i;
4989         size_t ie_len;
4990
4991         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4992                 return -EINVAL;
4993
4994         wiphy = &rdev->wiphy;
4995
4996         if (!rdev->ops->scan)
4997                 return -EOPNOTSUPP;
4998
4999         if (rdev->scan_req)
5000                 return -EBUSY;
5001
5002         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5003                 n_channels = validate_scan_freqs(
5004                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5005                 if (!n_channels)
5006                         return -EINVAL;
5007         } else {
5008                 enum ieee80211_band band;
5009                 n_channels = 0;
5010
5011                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5012                         if (wiphy->bands[band])
5013                                 n_channels += wiphy->bands[band]->n_channels;
5014         }
5015
5016         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5017                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
5018                         n_ssids++;
5019
5020         if (n_ssids > wiphy->max_scan_ssids)
5021                 return -EINVAL;
5022
5023         if (info->attrs[NL80211_ATTR_IE])
5024                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5025         else
5026                 ie_len = 0;
5027
5028         if (ie_len > wiphy->max_scan_ie_len)
5029                 return -EINVAL;
5030
5031         request = kzalloc(sizeof(*request)
5032                         + sizeof(*request->ssids) * n_ssids
5033                         + sizeof(*request->channels) * n_channels
5034                         + ie_len, GFP_KERNEL);
5035         if (!request)
5036                 return -ENOMEM;
5037
5038         if (n_ssids)
5039                 request->ssids = (void *)&request->channels[n_channels];
5040         request->n_ssids = n_ssids;
5041         if (ie_len) {
5042                 if (request->ssids)
5043                         request->ie = (void *)(request->ssids + n_ssids);
5044                 else
5045                         request->ie = (void *)(request->channels + n_channels);
5046         }
5047
5048         i = 0;
5049         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5050                 /* user specified, bail out if channel not found */
5051                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
5052                         struct ieee80211_channel *chan;
5053
5054                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5055
5056                         if (!chan) {
5057                                 err = -EINVAL;
5058                                 goto out_free;
5059                         }
5060
5061                         /* ignore disabled channels */
5062                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5063                                 continue;
5064
5065                         request->channels[i] = chan;
5066                         i++;
5067                 }
5068         } else {
5069                 enum ieee80211_band band;
5070
5071                 /* all channels */
5072                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5073                         int j;
5074                         if (!wiphy->bands[band])
5075                                 continue;
5076                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5077                                 struct ieee80211_channel *chan;
5078
5079                                 chan = &wiphy->bands[band]->channels[j];
5080
5081                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5082                                         continue;
5083
5084                                 request->channels[i] = chan;
5085                                 i++;
5086                         }
5087                 }
5088         }
5089
5090         if (!i) {
5091                 err = -EINVAL;
5092                 goto out_free;
5093         }
5094
5095         request->n_channels = i;
5096
5097         i = 0;
5098         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5099                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
5100                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5101                                 err = -EINVAL;
5102                                 goto out_free;
5103                         }
5104                         request->ssids[i].ssid_len = nla_len(attr);
5105                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
5106                         i++;
5107                 }
5108         }
5109
5110         if (info->attrs[NL80211_ATTR_IE]) {
5111                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5112                 memcpy((void *)request->ie,
5113                        nla_data(info->attrs[NL80211_ATTR_IE]),
5114                        request->ie_len);
5115         }
5116
5117         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
5118                 if (wiphy->bands[i])
5119                         request->rates[i] =
5120                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
5121
5122         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
5123                 nla_for_each_nested(attr,
5124                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
5125                                     tmp) {
5126                         enum ieee80211_band band = nla_type(attr);
5127
5128                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
5129                                 err = -EINVAL;
5130                                 goto out_free;
5131                         }
5132                         err = ieee80211_get_ratemask(wiphy->bands[band],
5133                                                      nla_data(attr),
5134                                                      nla_len(attr),
5135                                                      &request->rates[band]);
5136                         if (err)
5137                                 goto out_free;
5138                 }
5139         }
5140
5141         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5142                 request->flags = nla_get_u32(
5143                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5144                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5145                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5146                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5147                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5148                         err = -EOPNOTSUPP;
5149                         goto out_free;
5150                 }
5151         }
5152
5153         request->no_cck =
5154                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5155
5156         request->wdev = wdev;
5157         request->wiphy = &rdev->wiphy;
5158         request->scan_start = jiffies;
5159
5160         rdev->scan_req = request;
5161         err = rdev_scan(rdev, request);
5162
5163         if (!err) {
5164                 nl80211_send_scan_start(rdev, wdev);
5165                 if (wdev->netdev)
5166                         dev_hold(wdev->netdev);
5167         } else {
5168  out_free:
5169                 rdev->scan_req = NULL;
5170                 kfree(request);
5171         }
5172
5173         return err;
5174 }
5175
5176 static int nl80211_start_sched_scan(struct sk_buff *skb,
5177                                     struct genl_info *info)
5178 {
5179         struct cfg80211_sched_scan_request *request;
5180         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5181         struct net_device *dev = info->user_ptr[1];
5182         struct nlattr *attr;
5183         struct wiphy *wiphy;
5184         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
5185         u32 interval;
5186         enum ieee80211_band band;
5187         size_t ie_len;
5188         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
5189
5190         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5191             !rdev->ops->sched_scan_start)
5192                 return -EOPNOTSUPP;
5193
5194         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5195                 return -EINVAL;
5196
5197         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
5198                 return -EINVAL;
5199
5200         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
5201         if (interval == 0)
5202                 return -EINVAL;
5203
5204         wiphy = &rdev->wiphy;
5205
5206         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5207                 n_channels = validate_scan_freqs(
5208                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
5209                 if (!n_channels)
5210                         return -EINVAL;
5211         } else {
5212                 n_channels = 0;
5213
5214                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
5215                         if (wiphy->bands[band])
5216                                 n_channels += wiphy->bands[band]->n_channels;
5217         }
5218
5219         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
5220                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5221                                     tmp)
5222                         n_ssids++;
5223
5224         if (n_ssids > wiphy->max_sched_scan_ssids)
5225                 return -EINVAL;
5226
5227         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
5228                 nla_for_each_nested(attr,
5229                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5230                                     tmp)
5231                         n_match_sets++;
5232
5233         if (n_match_sets > wiphy->max_match_sets)
5234                 return -EINVAL;
5235
5236         if (info->attrs[NL80211_ATTR_IE])
5237                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5238         else
5239                 ie_len = 0;
5240
5241         if (ie_len > wiphy->max_sched_scan_ie_len)
5242                 return -EINVAL;
5243
5244         mutex_lock(&rdev->sched_scan_mtx);
5245
5246         if (rdev->sched_scan_req) {
5247                 err = -EINPROGRESS;
5248                 goto out;
5249         }
5250
5251         request = kzalloc(sizeof(*request)
5252                         + sizeof(*request->ssids) * n_ssids
5253                         + sizeof(*request->match_sets) * n_match_sets
5254                         + sizeof(*request->channels) * n_channels
5255                         + ie_len, GFP_KERNEL);
5256         if (!request) {
5257                 err = -ENOMEM;
5258                 goto out;
5259         }
5260
5261         if (n_ssids)
5262                 request->ssids = (void *)&request->channels[n_channels];
5263         request->n_ssids = n_ssids;
5264         if (ie_len) {
5265                 if (request->ssids)
5266                         request->ie = (void *)(request->ssids + n_ssids);
5267                 else
5268                         request->ie = (void *)(request->channels + n_channels);
5269         }
5270
5271         if (n_match_sets) {
5272                 if (request->ie)
5273                         request->match_sets = (void *)(request->ie + ie_len);
5274                 else if (request->ssids)
5275                         request->match_sets =
5276                                 (void *)(request->ssids + n_ssids);
5277                 else
5278                         request->match_sets =
5279                                 (void *)(request->channels + n_channels);
5280         }
5281         request->n_match_sets = n_match_sets;
5282
5283         i = 0;
5284         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5285                 /* user specified, bail out if channel not found */
5286                 nla_for_each_nested(attr,
5287                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5288                                     tmp) {
5289                         struct ieee80211_channel *chan;
5290
5291                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5292
5293                         if (!chan) {
5294                                 err = -EINVAL;
5295                                 goto out_free;
5296                         }
5297
5298                         /* ignore disabled channels */
5299                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5300                                 continue;
5301
5302                         request->channels[i] = chan;
5303                         i++;
5304                 }
5305         } else {
5306                 /* all channels */
5307                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5308                         int j;
5309                         if (!wiphy->bands[band])
5310                                 continue;
5311                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5312                                 struct ieee80211_channel *chan;
5313
5314                                 chan = &wiphy->bands[band]->channels[j];
5315
5316                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5317                                         continue;
5318
5319                                 request->channels[i] = chan;
5320                                 i++;
5321                         }
5322                 }
5323         }
5324
5325         if (!i) {
5326                 err = -EINVAL;
5327                 goto out_free;
5328         }
5329
5330         request->n_channels = i;
5331
5332         i = 0;
5333         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5334                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5335                                     tmp) {
5336                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5337                                 err = -EINVAL;
5338                                 goto out_free;
5339                         }
5340                         request->ssids[i].ssid_len = nla_len(attr);
5341                         memcpy(request->ssids[i].ssid, nla_data(attr),
5342                                nla_len(attr));
5343                         i++;
5344                 }
5345         }
5346
5347         i = 0;
5348         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5349                 nla_for_each_nested(attr,
5350                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5351                                     tmp) {
5352                         struct nlattr *ssid, *rssi;
5353
5354                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5355                                   nla_data(attr), nla_len(attr),
5356                                   nl80211_match_policy);
5357                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5358                         if (ssid) {
5359                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5360                                         err = -EINVAL;
5361                                         goto out_free;
5362                                 }
5363                                 memcpy(request->match_sets[i].ssid.ssid,
5364                                        nla_data(ssid), nla_len(ssid));
5365                                 request->match_sets[i].ssid.ssid_len =
5366                                         nla_len(ssid);
5367                         }
5368                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5369                         if (rssi)
5370                                 request->rssi_thold = nla_get_u32(rssi);
5371                         else
5372                                 request->rssi_thold =
5373                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5374                         i++;
5375                 }
5376         }
5377
5378         if (info->attrs[NL80211_ATTR_IE]) {
5379                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5380                 memcpy((void *)request->ie,
5381                        nla_data(info->attrs[NL80211_ATTR_IE]),
5382                        request->ie_len);
5383         }
5384
5385         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5386                 request->flags = nla_get_u32(
5387                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5388                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5389                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5390                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5391                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5392                         err = -EOPNOTSUPP;
5393                         goto out_free;
5394                 }
5395         }
5396
5397         request->dev = dev;
5398         request->wiphy = &rdev->wiphy;
5399         request->interval = interval;
5400         request->scan_start = jiffies;
5401
5402         err = rdev_sched_scan_start(rdev, dev, request);
5403         if (!err) {
5404                 rdev->sched_scan_req = request;
5405                 nl80211_send_sched_scan(rdev, dev,
5406                                         NL80211_CMD_START_SCHED_SCAN);
5407                 goto out;
5408         }
5409
5410 out_free:
5411         kfree(request);
5412 out:
5413         mutex_unlock(&rdev->sched_scan_mtx);
5414         return err;
5415 }
5416
5417 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5418                                    struct genl_info *info)
5419 {
5420         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5421         int err;
5422
5423         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5424             !rdev->ops->sched_scan_stop)
5425                 return -EOPNOTSUPP;
5426
5427         mutex_lock(&rdev->sched_scan_mtx);
5428         err = __cfg80211_stop_sched_scan(rdev, false);
5429         mutex_unlock(&rdev->sched_scan_mtx);
5430
5431         return err;
5432 }
5433
5434 static int nl80211_start_radar_detection(struct sk_buff *skb,
5435                                          struct genl_info *info)
5436 {
5437         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5438         struct net_device *dev = info->user_ptr[1];
5439         struct wireless_dev *wdev = dev->ieee80211_ptr;
5440         struct cfg80211_chan_def chandef;
5441         int err;
5442
5443         err = nl80211_parse_chandef(rdev, info, &chandef);
5444         if (err)
5445                 return err;
5446
5447         if (wdev->cac_started)
5448                 return -EBUSY;
5449
5450         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5451         if (err < 0)
5452                 return err;
5453
5454         if (err == 0)
5455                 return -EINVAL;
5456
5457         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5458                 return -EINVAL;
5459
5460         if (!rdev->ops->start_radar_detection)
5461                 return -EOPNOTSUPP;
5462
5463         mutex_lock(&rdev->devlist_mtx);
5464         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5465                                            chandef.chan, CHAN_MODE_SHARED,
5466                                            BIT(chandef.width));
5467         if (err)
5468                 goto err_locked;
5469
5470         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5471         if (!err) {
5472                 wdev->channel = chandef.chan;
5473                 wdev->cac_started = true;
5474                 wdev->cac_start_time = jiffies;
5475         }
5476 err_locked:
5477         mutex_unlock(&rdev->devlist_mtx);
5478
5479         return err;
5480 }
5481
5482 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5483                             u32 seq, int flags,
5484                             struct cfg80211_registered_device *rdev,
5485                             struct wireless_dev *wdev,
5486                             struct cfg80211_internal_bss *intbss)
5487 {
5488         struct cfg80211_bss *res = &intbss->pub;
5489         const struct cfg80211_bss_ies *ies;
5490         void *hdr;
5491         struct nlattr *bss;
5492         bool tsf = false;
5493
5494         ASSERT_WDEV_LOCK(wdev);
5495
5496         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5497                              NL80211_CMD_NEW_SCAN_RESULTS);
5498         if (!hdr)
5499                 return -1;
5500
5501         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5502
5503         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
5504             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5505                 goto nla_put_failure;
5506
5507         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5508         if (!bss)
5509                 goto nla_put_failure;
5510         if ((!is_zero_ether_addr(res->bssid) &&
5511              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5512                 goto nla_put_failure;
5513
5514         rcu_read_lock();
5515         ies = rcu_dereference(res->ies);
5516         if (ies) {
5517                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5518                         goto fail_unlock_rcu;
5519                 tsf = true;
5520                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5521                                         ies->len, ies->data))
5522                         goto fail_unlock_rcu;
5523         }
5524         ies = rcu_dereference(res->beacon_ies);
5525         if (ies) {
5526                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5527                         goto fail_unlock_rcu;
5528                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5529                                         ies->len, ies->data))
5530                         goto fail_unlock_rcu;
5531         }
5532         rcu_read_unlock();
5533
5534         if (res->beacon_interval &&
5535             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5536                 goto nla_put_failure;
5537         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5538             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5539             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5540                         jiffies_to_msecs(jiffies - intbss->ts)))
5541                 goto nla_put_failure;
5542
5543         switch (rdev->wiphy.signal_type) {
5544         case CFG80211_SIGNAL_TYPE_MBM:
5545                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5546                         goto nla_put_failure;
5547                 break;
5548         case CFG80211_SIGNAL_TYPE_UNSPEC:
5549                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5550                         goto nla_put_failure;
5551                 break;
5552         default:
5553                 break;
5554         }
5555
5556         switch (wdev->iftype) {
5557         case NL80211_IFTYPE_P2P_CLIENT:
5558         case NL80211_IFTYPE_STATION:
5559                 if (intbss == wdev->current_bss &&
5560                     nla_put_u32(msg, NL80211_BSS_STATUS,
5561                                 NL80211_BSS_STATUS_ASSOCIATED))
5562                         goto nla_put_failure;
5563                 break;
5564         case NL80211_IFTYPE_ADHOC:
5565                 if (intbss == wdev->current_bss &&
5566                     nla_put_u32(msg, NL80211_BSS_STATUS,
5567                                 NL80211_BSS_STATUS_IBSS_JOINED))
5568                         goto nla_put_failure;
5569                 break;
5570         default:
5571                 break;
5572         }
5573
5574         nla_nest_end(msg, bss);
5575
5576         return genlmsg_end(msg, hdr);
5577
5578  fail_unlock_rcu:
5579         rcu_read_unlock();
5580  nla_put_failure:
5581         genlmsg_cancel(msg, hdr);
5582         return -EMSGSIZE;
5583 }
5584
5585 static int nl80211_dump_scan(struct sk_buff *skb,
5586                              struct netlink_callback *cb)
5587 {
5588         struct cfg80211_registered_device *rdev;
5589         struct net_device *dev;
5590         struct cfg80211_internal_bss *scan;
5591         struct wireless_dev *wdev;
5592         int start = cb->args[1], idx = 0;
5593         int err;
5594
5595         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
5596         if (err)
5597                 return err;
5598
5599         wdev = dev->ieee80211_ptr;
5600
5601         wdev_lock(wdev);
5602         spin_lock_bh(&rdev->bss_lock);
5603         cfg80211_bss_expire(rdev);
5604
5605         cb->seq = rdev->bss_generation;
5606
5607         list_for_each_entry(scan, &rdev->bss_list, list) {
5608                 if (++idx <= start)
5609                         continue;
5610                 if (nl80211_send_bss(skb, cb,
5611                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5612                                 rdev, wdev, scan) < 0) {
5613                         idx--;
5614                         break;
5615                 }
5616         }
5617
5618         spin_unlock_bh(&rdev->bss_lock);
5619         wdev_unlock(wdev);
5620
5621         cb->args[1] = idx;
5622         nl80211_finish_netdev_dump(rdev);
5623
5624         return skb->len;
5625 }
5626
5627 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5628                                 int flags, struct net_device *dev,
5629                                 struct survey_info *survey)
5630 {
5631         void *hdr;
5632         struct nlattr *infoattr;
5633
5634         hdr = nl80211hdr_put(msg, portid, seq, flags,
5635                              NL80211_CMD_NEW_SURVEY_RESULTS);
5636         if (!hdr)
5637                 return -ENOMEM;
5638
5639         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5640                 goto nla_put_failure;
5641
5642         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5643         if (!infoattr)
5644                 goto nla_put_failure;
5645
5646         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5647                         survey->channel->center_freq))
5648                 goto nla_put_failure;
5649
5650         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5651             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5652                 goto nla_put_failure;
5653         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5654             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5655                 goto nla_put_failure;
5656         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5657             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5658                         survey->channel_time))
5659                 goto nla_put_failure;
5660         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5661             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5662                         survey->channel_time_busy))
5663                 goto nla_put_failure;
5664         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5665             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5666                         survey->channel_time_ext_busy))
5667                 goto nla_put_failure;
5668         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5669             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5670                         survey->channel_time_rx))
5671                 goto nla_put_failure;
5672         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5673             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5674                         survey->channel_time_tx))
5675                 goto nla_put_failure;
5676
5677         nla_nest_end(msg, infoattr);
5678
5679         return genlmsg_end(msg, hdr);
5680
5681  nla_put_failure:
5682         genlmsg_cancel(msg, hdr);
5683         return -EMSGSIZE;
5684 }
5685
5686 static int nl80211_dump_survey(struct sk_buff *skb,
5687                         struct netlink_callback *cb)
5688 {
5689         struct survey_info survey;
5690         struct cfg80211_registered_device *dev;
5691         struct net_device *netdev;
5692         int survey_idx = cb->args[1];
5693         int res;
5694
5695         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5696         if (res)
5697                 return res;
5698
5699         if (!dev->ops->dump_survey) {
5700                 res = -EOPNOTSUPP;
5701                 goto out_err;
5702         }
5703
5704         while (1) {
5705                 struct ieee80211_channel *chan;
5706
5707                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5708                 if (res == -ENOENT)
5709                         break;
5710                 if (res)
5711                         goto out_err;
5712
5713                 /* Survey without a channel doesn't make sense */
5714                 if (!survey.channel) {
5715                         res = -EINVAL;
5716                         goto out;
5717                 }
5718
5719                 chan = ieee80211_get_channel(&dev->wiphy,
5720                                              survey.channel->center_freq);
5721                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5722                         survey_idx++;
5723                         continue;
5724                 }
5725
5726                 if (nl80211_send_survey(skb,
5727                                 NETLINK_CB(cb->skb).portid,
5728                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5729                                 netdev,
5730                                 &survey) < 0)
5731                         goto out;
5732                 survey_idx++;
5733         }
5734
5735  out:
5736         cb->args[1] = survey_idx;
5737         res = skb->len;
5738  out_err:
5739         nl80211_finish_netdev_dump(dev);
5740         return res;
5741 }
5742
5743 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5744 {
5745         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5746                                   NL80211_WPA_VERSION_2));
5747 }
5748
5749 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5750 {
5751         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5752         struct net_device *dev = info->user_ptr[1];
5753         struct ieee80211_channel *chan;
5754         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5755         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5756         enum nl80211_auth_type auth_type;
5757         struct key_parse key;
5758         bool local_state_change;
5759
5760         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5761                 return -EINVAL;
5762
5763         if (!info->attrs[NL80211_ATTR_MAC])
5764                 return -EINVAL;
5765
5766         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5767                 return -EINVAL;
5768
5769         if (!info->attrs[NL80211_ATTR_SSID])
5770                 return -EINVAL;
5771
5772         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5773                 return -EINVAL;
5774
5775         err = nl80211_parse_key(info, &key);
5776         if (err)
5777                 return err;
5778
5779         if (key.idx >= 0) {
5780                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5781                         return -EINVAL;
5782                 if (!key.p.key || !key.p.key_len)
5783                         return -EINVAL;
5784                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5785                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5786                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5787                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5788                         return -EINVAL;
5789                 if (key.idx > 4)
5790                         return -EINVAL;
5791         } else {
5792                 key.p.key_len = 0;
5793                 key.p.key = NULL;
5794         }
5795
5796         if (key.idx >= 0) {
5797                 int i;
5798                 bool ok = false;
5799                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5800                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5801                                 ok = true;
5802                                 break;
5803                         }
5804                 }
5805                 if (!ok)
5806                         return -EINVAL;
5807         }
5808
5809         if (!rdev->ops->auth)
5810                 return -EOPNOTSUPP;
5811
5812         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5813             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5814                 return -EOPNOTSUPP;
5815
5816         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5817         chan = ieee80211_get_channel(&rdev->wiphy,
5818                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5819         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5820                 return -EINVAL;
5821
5822         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5823         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5824
5825         if (info->attrs[NL80211_ATTR_IE]) {
5826                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5827                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5828         }
5829
5830         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5831         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5832                 return -EINVAL;
5833
5834         if (auth_type == NL80211_AUTHTYPE_SAE &&
5835             !info->attrs[NL80211_ATTR_SAE_DATA])
5836                 return -EINVAL;
5837
5838         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5839                 if (auth_type != NL80211_AUTHTYPE_SAE)
5840                         return -EINVAL;
5841                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5842                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5843                 /* need to include at least Auth Transaction and Status Code */
5844                 if (sae_data_len < 4)
5845                         return -EINVAL;
5846         }
5847
5848         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5849
5850         /*
5851          * Since we no longer track auth state, ignore
5852          * requests to only change local state.
5853          */
5854         if (local_state_change)
5855                 return 0;
5856
5857         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5858                                   ssid, ssid_len, ie, ie_len,
5859                                   key.p.key, key.p.key_len, key.idx,
5860                                   sae_data, sae_data_len);
5861 }
5862
5863 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5864                                    struct genl_info *info,
5865                                    struct cfg80211_crypto_settings *settings,
5866                                    int cipher_limit)
5867 {
5868         memset(settings, 0, sizeof(*settings));
5869
5870         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5871
5872         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5873                 u16 proto;
5874                 proto = nla_get_u16(
5875                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5876                 settings->control_port_ethertype = cpu_to_be16(proto);
5877                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5878                     proto != ETH_P_PAE)
5879                         return -EINVAL;
5880                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5881                         settings->control_port_no_encrypt = true;
5882         } else
5883                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5884
5885         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5886                 void *data;
5887                 int len, i;
5888
5889                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5890                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5891                 settings->n_ciphers_pairwise = len / sizeof(u32);
5892
5893                 if (len % sizeof(u32))
5894                         return -EINVAL;
5895
5896                 if (settings->n_ciphers_pairwise > cipher_limit)
5897                         return -EINVAL;
5898
5899                 memcpy(settings->ciphers_pairwise, data, len);
5900
5901                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5902                         if (!cfg80211_supported_cipher_suite(
5903                                         &rdev->wiphy,
5904                                         settings->ciphers_pairwise[i]))
5905                                 return -EINVAL;
5906         }
5907
5908         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5909                 settings->cipher_group =
5910                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5911                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5912                                                      settings->cipher_group))
5913                         return -EINVAL;
5914         }
5915
5916         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5917                 settings->wpa_versions =
5918                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5919                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5920                         return -EINVAL;
5921         }
5922
5923         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5924                 void *data;
5925                 int len;
5926
5927                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5928                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5929                 settings->n_akm_suites = len / sizeof(u32);
5930
5931                 if (len % sizeof(u32))
5932                         return -EINVAL;
5933
5934                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5935                         return -EINVAL;
5936
5937                 memcpy(settings->akm_suites, data, len);
5938         }
5939
5940         return 0;
5941 }
5942
5943 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5944 {
5945         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5946         struct net_device *dev = info->user_ptr[1];
5947         struct cfg80211_crypto_settings crypto;
5948         struct ieee80211_channel *chan;
5949         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5950         int err, ssid_len, ie_len = 0;
5951         bool use_mfp = false;
5952         u32 flags = 0;
5953         struct ieee80211_ht_cap *ht_capa = NULL;
5954         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5955
5956         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5957                 return -EINVAL;
5958
5959         if (!info->attrs[NL80211_ATTR_MAC] ||
5960             !info->attrs[NL80211_ATTR_SSID] ||
5961             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5962                 return -EINVAL;
5963
5964         if (!rdev->ops->assoc)
5965                 return -EOPNOTSUPP;
5966
5967         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5968             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5969                 return -EOPNOTSUPP;
5970
5971         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5972
5973         chan = ieee80211_get_channel(&rdev->wiphy,
5974                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5975         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5976                 return -EINVAL;
5977
5978         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5979         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5980
5981         if (info->attrs[NL80211_ATTR_IE]) {
5982                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5983                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5984         }
5985
5986         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5987                 enum nl80211_mfp mfp =
5988                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5989                 if (mfp == NL80211_MFP_REQUIRED)
5990                         use_mfp = true;
5991                 else if (mfp != NL80211_MFP_NO)
5992                         return -EINVAL;
5993         }
5994
5995         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5996                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5997
5998         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5999                 flags |= ASSOC_REQ_DISABLE_HT;
6000
6001         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6002                 ht_capa_mask =
6003                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
6004
6005         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6006                 if (!ht_capa_mask)
6007                         return -EINVAL;
6008                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
6009         }
6010
6011         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
6012         if (!err)
6013                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
6014                                           ssid, ssid_len, ie, ie_len, use_mfp,
6015                                           &crypto, flags, ht_capa,
6016                                           ht_capa_mask);
6017
6018         return err;
6019 }
6020
6021 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
6022 {
6023         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6024         struct net_device *dev = info->user_ptr[1];
6025         const u8 *ie = NULL, *bssid;
6026         int ie_len = 0;
6027         u16 reason_code;
6028         bool local_state_change;
6029
6030         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6031                 return -EINVAL;
6032
6033         if (!info->attrs[NL80211_ATTR_MAC])
6034                 return -EINVAL;
6035
6036         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6037                 return -EINVAL;
6038
6039         if (!rdev->ops->deauth)
6040                 return -EOPNOTSUPP;
6041
6042         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6043             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6044                 return -EOPNOTSUPP;
6045
6046         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6047
6048         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6049         if (reason_code == 0) {
6050                 /* Reason Code 0 is reserved */
6051                 return -EINVAL;
6052         }
6053
6054         if (info->attrs[NL80211_ATTR_IE]) {
6055                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6056                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6057         }
6058
6059         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6060
6061         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
6062                                     local_state_change);
6063 }
6064
6065 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
6066 {
6067         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6068         struct net_device *dev = info->user_ptr[1];
6069         const u8 *ie = NULL, *bssid;
6070         int ie_len = 0;
6071         u16 reason_code;
6072         bool local_state_change;
6073
6074         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6075                 return -EINVAL;
6076
6077         if (!info->attrs[NL80211_ATTR_MAC])
6078                 return -EINVAL;
6079
6080         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6081                 return -EINVAL;
6082
6083         if (!rdev->ops->disassoc)
6084                 return -EOPNOTSUPP;
6085
6086         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6087             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6088                 return -EOPNOTSUPP;
6089
6090         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6091
6092         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6093         if (reason_code == 0) {
6094                 /* Reason Code 0 is reserved */
6095                 return -EINVAL;
6096         }
6097
6098         if (info->attrs[NL80211_ATTR_IE]) {
6099                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6100                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6101         }
6102
6103         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
6104
6105         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
6106                                       local_state_change);
6107 }
6108
6109 static bool
6110 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
6111                          int mcast_rate[IEEE80211_NUM_BANDS],
6112                          int rateval)
6113 {
6114         struct wiphy *wiphy = &rdev->wiphy;
6115         bool found = false;
6116         int band, i;
6117
6118         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
6119                 struct ieee80211_supported_band *sband;
6120
6121                 sband = wiphy->bands[band];
6122                 if (!sband)
6123                         continue;
6124
6125                 for (i = 0; i < sband->n_bitrates; i++) {
6126                         if (sband->bitrates[i].bitrate == rateval) {
6127                                 mcast_rate[band] = i + 1;
6128                                 found = true;
6129                                 break;
6130                         }
6131                 }
6132         }
6133
6134         return found;
6135 }
6136
6137 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
6138 {
6139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6140         struct net_device *dev = info->user_ptr[1];
6141         struct cfg80211_ibss_params ibss;
6142         struct wiphy *wiphy;
6143         struct cfg80211_cached_keys *connkeys = NULL;
6144         int err;
6145
6146         memset(&ibss, 0, sizeof(ibss));
6147
6148         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6149                 return -EINVAL;
6150
6151         if (!info->attrs[NL80211_ATTR_SSID] ||
6152             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6153                 return -EINVAL;
6154
6155         ibss.beacon_interval = 100;
6156
6157         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
6158                 ibss.beacon_interval =
6159                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
6160                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
6161                         return -EINVAL;
6162         }
6163
6164         if (!rdev->ops->join_ibss)
6165                 return -EOPNOTSUPP;
6166
6167         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6168                 return -EOPNOTSUPP;
6169
6170         wiphy = &rdev->wiphy;
6171
6172         if (info->attrs[NL80211_ATTR_MAC]) {
6173                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6174
6175                 if (!is_valid_ether_addr(ibss.bssid))
6176                         return -EINVAL;
6177         }
6178         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6179         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6180
6181         if (info->attrs[NL80211_ATTR_IE]) {
6182                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6183                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6184         }
6185
6186         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
6187         if (err)
6188                 return err;
6189
6190         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
6191                 return -EINVAL;
6192
6193         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
6194                 return -EINVAL;
6195         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
6196             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
6197                 return -EINVAL;
6198
6199         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
6200         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
6201
6202         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
6203                 u8 *rates =
6204                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6205                 int n_rates =
6206                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
6207                 struct ieee80211_supported_band *sband =
6208                         wiphy->bands[ibss.chandef.chan->band];
6209
6210                 err = ieee80211_get_ratemask(sband, rates, n_rates,
6211                                              &ibss.basic_rates);
6212                 if (err)
6213                         return err;
6214         }
6215
6216         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6217             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
6218                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6219                 return -EINVAL;
6220
6221         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6222                 bool no_ht = false;
6223
6224                 connkeys = nl80211_parse_connkeys(rdev,
6225                                           info->attrs[NL80211_ATTR_KEYS],
6226                                           &no_ht);
6227                 if (IS_ERR(connkeys))
6228                         return PTR_ERR(connkeys);
6229
6230                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
6231                     no_ht) {
6232                         kfree(connkeys);
6233                         return -EINVAL;
6234                 }
6235         }
6236
6237         ibss.control_port =
6238                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
6239
6240         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
6241         if (err)
6242                 kfree(connkeys);
6243         return err;
6244 }
6245
6246 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
6247 {
6248         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6249         struct net_device *dev = info->user_ptr[1];
6250
6251         if (!rdev->ops->leave_ibss)
6252                 return -EOPNOTSUPP;
6253
6254         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
6255                 return -EOPNOTSUPP;
6256
6257         return cfg80211_leave_ibss(rdev, dev, false);
6258 }
6259
6260 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
6261 {
6262         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6263         struct net_device *dev = info->user_ptr[1];
6264         int mcast_rate[IEEE80211_NUM_BANDS];
6265         u32 nla_rate;
6266         int err;
6267
6268         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6269             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
6270                 return -EOPNOTSUPP;
6271
6272         if (!rdev->ops->set_mcast_rate)
6273                 return -EOPNOTSUPP;
6274
6275         memset(mcast_rate, 0, sizeof(mcast_rate));
6276
6277         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
6278                 return -EINVAL;
6279
6280         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6281         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6282                 return -EINVAL;
6283
6284         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6285
6286         return err;
6287 }
6288
6289
6290 #ifdef CONFIG_NL80211_TESTMODE
6291 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6292         .name = "testmode",
6293 };
6294
6295 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6296 {
6297         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6298         int err;
6299
6300         if (!info->attrs[NL80211_ATTR_TESTDATA])
6301                 return -EINVAL;
6302
6303         err = -EOPNOTSUPP;
6304         if (rdev->ops->testmode_cmd) {
6305                 rdev->testmode_info = info;
6306                 err = rdev_testmode_cmd(rdev,
6307                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6308                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6309                 rdev->testmode_info = NULL;
6310         }
6311
6312         return err;
6313 }
6314
6315 static int nl80211_testmode_dump(struct sk_buff *skb,
6316                                  struct netlink_callback *cb)
6317 {
6318         struct cfg80211_registered_device *rdev;
6319         int err;
6320         long phy_idx;
6321         void *data = NULL;
6322         int data_len = 0;
6323
6324         if (cb->args[0]) {
6325                 /*
6326                  * 0 is a valid index, but not valid for args[0],
6327                  * so we need to offset by 1.
6328                  */
6329                 phy_idx = cb->args[0] - 1;
6330         } else {
6331                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6332                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6333                                   nl80211_policy);
6334                 if (err)
6335                         return err;
6336
6337                 mutex_lock(&cfg80211_mutex);
6338                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6339                                                   nl80211_fam.attrbuf);
6340                 if (IS_ERR(rdev)) {
6341                         mutex_unlock(&cfg80211_mutex);
6342                         return PTR_ERR(rdev);
6343                 }
6344                 phy_idx = rdev->wiphy_idx;
6345                 rdev = NULL;
6346                 mutex_unlock(&cfg80211_mutex);
6347
6348                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6349                         cb->args[1] =
6350                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6351         }
6352
6353         if (cb->args[1]) {
6354                 data = nla_data((void *)cb->args[1]);
6355                 data_len = nla_len((void *)cb->args[1]);
6356         }
6357
6358         mutex_lock(&cfg80211_mutex);
6359         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6360         if (!rdev) {
6361                 mutex_unlock(&cfg80211_mutex);
6362                 return -ENOENT;
6363         }
6364         cfg80211_lock_rdev(rdev);
6365         mutex_unlock(&cfg80211_mutex);
6366
6367         if (!rdev->ops->testmode_dump) {
6368                 err = -EOPNOTSUPP;
6369                 goto out_err;
6370         }
6371
6372         while (1) {
6373                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6374                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6375                                            NL80211_CMD_TESTMODE);
6376                 struct nlattr *tmdata;
6377
6378                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6379                         genlmsg_cancel(skb, hdr);
6380                         break;
6381                 }
6382
6383                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6384                 if (!tmdata) {
6385                         genlmsg_cancel(skb, hdr);
6386                         break;
6387                 }
6388                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6389                 nla_nest_end(skb, tmdata);
6390
6391                 if (err == -ENOBUFS || err == -ENOENT) {
6392                         genlmsg_cancel(skb, hdr);
6393                         break;
6394                 } else if (err) {
6395                         genlmsg_cancel(skb, hdr);
6396                         goto out_err;
6397                 }
6398
6399                 genlmsg_end(skb, hdr);
6400         }
6401
6402         err = skb->len;
6403         /* see above */
6404         cb->args[0] = phy_idx + 1;
6405  out_err:
6406         cfg80211_unlock_rdev(rdev);
6407         return err;
6408 }
6409
6410 static struct sk_buff *
6411 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6412                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6413 {
6414         struct sk_buff *skb;
6415         void *hdr;
6416         struct nlattr *data;
6417
6418         skb = nlmsg_new(approxlen + 100, gfp);
6419         if (!skb)
6420                 return NULL;
6421
6422         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6423         if (!hdr) {
6424                 kfree_skb(skb);
6425                 return NULL;
6426         }
6427
6428         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6429                 goto nla_put_failure;
6430         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6431
6432         ((void **)skb->cb)[0] = rdev;
6433         ((void **)skb->cb)[1] = hdr;
6434         ((void **)skb->cb)[2] = data;
6435
6436         return skb;
6437
6438  nla_put_failure:
6439         kfree_skb(skb);
6440         return NULL;
6441 }
6442
6443 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6444                                                   int approxlen)
6445 {
6446         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6447
6448         if (WARN_ON(!rdev->testmode_info))
6449                 return NULL;
6450
6451         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6452                                 rdev->testmode_info->snd_portid,
6453                                 rdev->testmode_info->snd_seq,
6454                                 GFP_KERNEL);
6455 }
6456 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6457
6458 int cfg80211_testmode_reply(struct sk_buff *skb)
6459 {
6460         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6461         void *hdr = ((void **)skb->cb)[1];
6462         struct nlattr *data = ((void **)skb->cb)[2];
6463
6464         if (WARN_ON(!rdev->testmode_info)) {
6465                 kfree_skb(skb);
6466                 return -EINVAL;
6467         }
6468
6469         nla_nest_end(skb, data);
6470         genlmsg_end(skb, hdr);
6471         return genlmsg_reply(skb, rdev->testmode_info);
6472 }
6473 EXPORT_SYMBOL(cfg80211_testmode_reply);
6474
6475 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6476                                                   int approxlen, gfp_t gfp)
6477 {
6478         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6479
6480         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6481 }
6482 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6483
6484 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6485 {
6486         void *hdr = ((void **)skb->cb)[1];
6487         struct nlattr *data = ((void **)skb->cb)[2];
6488
6489         nla_nest_end(skb, data);
6490         genlmsg_end(skb, hdr);
6491         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6492 }
6493 EXPORT_SYMBOL(cfg80211_testmode_event);
6494 #endif
6495
6496 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6497 {
6498         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6499         struct net_device *dev = info->user_ptr[1];
6500         struct cfg80211_connect_params connect;
6501         struct wiphy *wiphy;
6502         struct cfg80211_cached_keys *connkeys = NULL;
6503         int err;
6504
6505         memset(&connect, 0, sizeof(connect));
6506
6507         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6508                 return -EINVAL;
6509
6510         if (!info->attrs[NL80211_ATTR_SSID] ||
6511             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6512                 return -EINVAL;
6513
6514         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6515                 connect.auth_type =
6516                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6517                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6518                                              NL80211_CMD_CONNECT))
6519                         return -EINVAL;
6520         } else
6521                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6522
6523         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6524
6525         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6526                                       NL80211_MAX_NR_CIPHER_SUITES);
6527         if (err)
6528                 return err;
6529
6530         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6531             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6532                 return -EOPNOTSUPP;
6533
6534         wiphy = &rdev->wiphy;
6535
6536         connect.bg_scan_period = -1;
6537         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6538                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6539                 connect.bg_scan_period =
6540                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6541         }
6542
6543         if (info->attrs[NL80211_ATTR_MAC])
6544                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6545         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6546         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6547
6548         if (info->attrs[NL80211_ATTR_IE]) {
6549                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6550                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6551         }
6552
6553         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6554                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6555                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6556                     connect.mfp != NL80211_MFP_NO)
6557                         return -EINVAL;
6558         } else {
6559                 connect.mfp = NL80211_MFP_NO;
6560         }
6561
6562         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6563                 connect.channel =
6564                         ieee80211_get_channel(wiphy,
6565                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6566                 if (!connect.channel ||
6567                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6568                         return -EINVAL;
6569         }
6570
6571         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6572                 connkeys = nl80211_parse_connkeys(rdev,
6573                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6574                 if (IS_ERR(connkeys))
6575                         return PTR_ERR(connkeys);
6576         }
6577
6578         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6579                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6580
6581         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6582                 memcpy(&connect.ht_capa_mask,
6583                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6584                        sizeof(connect.ht_capa_mask));
6585
6586         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6587                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6588                         kfree(connkeys);
6589                         return -EINVAL;
6590                 }
6591                 memcpy(&connect.ht_capa,
6592                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6593                        sizeof(connect.ht_capa));
6594         }
6595
6596         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6597         if (err)
6598                 kfree(connkeys);
6599         return err;
6600 }
6601
6602 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6603 {
6604         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6605         struct net_device *dev = info->user_ptr[1];
6606         u16 reason;
6607
6608         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6609                 reason = WLAN_REASON_DEAUTH_LEAVING;
6610         else
6611                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6612
6613         if (reason == 0)
6614                 return -EINVAL;
6615
6616         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6617             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6618                 return -EOPNOTSUPP;
6619
6620         return cfg80211_disconnect(rdev, dev, reason, true);
6621 }
6622
6623 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6624 {
6625         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6626         struct net *net;
6627         int err;
6628         u32 pid;
6629
6630         if (!info->attrs[NL80211_ATTR_PID])
6631                 return -EINVAL;
6632
6633         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6634
6635         net = get_net_ns_by_pid(pid);
6636         if (IS_ERR(net))
6637                 return PTR_ERR(net);
6638
6639         err = 0;
6640
6641         /* check if anything to do */
6642         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6643                 err = cfg80211_switch_netns(rdev, net);
6644
6645         put_net(net);
6646         return err;
6647 }
6648
6649 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6650 {
6651         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6652         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6653                         struct cfg80211_pmksa *pmksa) = NULL;
6654         struct net_device *dev = info->user_ptr[1];
6655         struct cfg80211_pmksa pmksa;
6656
6657         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6658
6659         if (!info->attrs[NL80211_ATTR_MAC])
6660                 return -EINVAL;
6661
6662         if (!info->attrs[NL80211_ATTR_PMKID])
6663                 return -EINVAL;
6664
6665         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6666         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6667
6668         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6669             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6670                 return -EOPNOTSUPP;
6671
6672         switch (info->genlhdr->cmd) {
6673         case NL80211_CMD_SET_PMKSA:
6674                 rdev_ops = rdev->ops->set_pmksa;
6675                 break;
6676         case NL80211_CMD_DEL_PMKSA:
6677                 rdev_ops = rdev->ops->del_pmksa;
6678                 break;
6679         default:
6680                 WARN_ON(1);
6681                 break;
6682         }
6683
6684         if (!rdev_ops)
6685                 return -EOPNOTSUPP;
6686
6687         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6688 }
6689
6690 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6691 {
6692         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6693         struct net_device *dev = info->user_ptr[1];
6694
6695         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6696             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6697                 return -EOPNOTSUPP;
6698
6699         if (!rdev->ops->flush_pmksa)
6700                 return -EOPNOTSUPP;
6701
6702         return rdev_flush_pmksa(rdev, dev);
6703 }
6704
6705 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6706 {
6707         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6708         struct net_device *dev = info->user_ptr[1];
6709         u8 action_code, dialog_token;
6710         u16 status_code;
6711         u8 *peer;
6712
6713         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6714             !rdev->ops->tdls_mgmt)
6715                 return -EOPNOTSUPP;
6716
6717         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6718             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6719             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6720             !info->attrs[NL80211_ATTR_IE] ||
6721             !info->attrs[NL80211_ATTR_MAC])
6722                 return -EINVAL;
6723
6724         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6725         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6726         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6727         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6728
6729         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6730                               dialog_token, status_code,
6731                               nla_data(info->attrs[NL80211_ATTR_IE]),
6732                               nla_len(info->attrs[NL80211_ATTR_IE]));
6733 }
6734
6735 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6736 {
6737         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6738         struct net_device *dev = info->user_ptr[1];
6739         enum nl80211_tdls_operation operation;
6740         u8 *peer;
6741
6742         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6743             !rdev->ops->tdls_oper)
6744                 return -EOPNOTSUPP;
6745
6746         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6747             !info->attrs[NL80211_ATTR_MAC])
6748                 return -EINVAL;
6749
6750         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6751         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6752
6753         return rdev_tdls_oper(rdev, dev, peer, operation);
6754 }
6755
6756 static int nl80211_remain_on_channel(struct sk_buff *skb,
6757                                      struct genl_info *info)
6758 {
6759         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6760         struct wireless_dev *wdev = info->user_ptr[1];
6761         struct cfg80211_chan_def chandef;
6762         struct sk_buff *msg;
6763         void *hdr;
6764         u64 cookie;
6765         u32 duration;
6766         int err;
6767
6768         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6769             !info->attrs[NL80211_ATTR_DURATION])
6770                 return -EINVAL;
6771
6772         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6773
6774         if (!rdev->ops->remain_on_channel ||
6775             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6776                 return -EOPNOTSUPP;
6777
6778         /*
6779          * We should be on that channel for at least a minimum amount of
6780          * time (10ms) but no longer than the driver supports.
6781          */
6782         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6783             duration > rdev->wiphy.max_remain_on_channel_duration)
6784                 return -EINVAL;
6785
6786         err = nl80211_parse_chandef(rdev, info, &chandef);
6787         if (err)
6788                 return err;
6789
6790         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6791         if (!msg)
6792                 return -ENOMEM;
6793
6794         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6795                              NL80211_CMD_REMAIN_ON_CHANNEL);
6796
6797         if (IS_ERR(hdr)) {
6798                 err = PTR_ERR(hdr);
6799                 goto free_msg;
6800         }
6801
6802         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6803                                      duration, &cookie);
6804
6805         if (err)
6806                 goto free_msg;
6807
6808         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6809                 goto nla_put_failure;
6810
6811         genlmsg_end(msg, hdr);
6812
6813         return genlmsg_reply(msg, info);
6814
6815  nla_put_failure:
6816         err = -ENOBUFS;
6817  free_msg:
6818         nlmsg_free(msg);
6819         return err;
6820 }
6821
6822 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6823                                             struct genl_info *info)
6824 {
6825         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6826         struct wireless_dev *wdev = info->user_ptr[1];
6827         u64 cookie;
6828
6829         if (!info->attrs[NL80211_ATTR_COOKIE])
6830                 return -EINVAL;
6831
6832         if (!rdev->ops->cancel_remain_on_channel)
6833                 return -EOPNOTSUPP;
6834
6835         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6836
6837         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6838 }
6839
6840 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6841                            u8 *rates, u8 rates_len)
6842 {
6843         u8 i;
6844         u32 mask = 0;
6845
6846         for (i = 0; i < rates_len; i++) {
6847                 int rate = (rates[i] & 0x7f) * 5;
6848                 int ridx;
6849                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6850                         struct ieee80211_rate *srate =
6851                                 &sband->bitrates[ridx];
6852                         if (rate == srate->bitrate) {
6853                                 mask |= 1 << ridx;
6854                                 break;
6855                         }
6856                 }
6857                 if (ridx == sband->n_bitrates)
6858                         return 0; /* rate not found */
6859         }
6860
6861         return mask;
6862 }
6863
6864 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6865                                u8 *rates, u8 rates_len,
6866                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6867 {
6868         u8 i;
6869
6870         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6871
6872         for (i = 0; i < rates_len; i++) {
6873                 int ridx, rbit;
6874
6875                 ridx = rates[i] / 8;
6876                 rbit = BIT(rates[i] % 8);
6877
6878                 /* check validity */
6879                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6880                         return false;
6881
6882                 /* check availability */
6883                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6884                         mcs[ridx] |= rbit;
6885                 else
6886                         return false;
6887         }
6888
6889         return true;
6890 }
6891
6892 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6893         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6894                                     .len = NL80211_MAX_SUPP_RATES },
6895         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6896                                  .len = NL80211_MAX_SUPP_HT_RATES },
6897 };
6898
6899 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6900                                        struct genl_info *info)
6901 {
6902         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6903         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6904         struct cfg80211_bitrate_mask mask;
6905         int rem, i;
6906         struct net_device *dev = info->user_ptr[1];
6907         struct nlattr *tx_rates;
6908         struct ieee80211_supported_band *sband;
6909
6910         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6911                 return -EINVAL;
6912
6913         if (!rdev->ops->set_bitrate_mask)
6914                 return -EOPNOTSUPP;
6915
6916         memset(&mask, 0, sizeof(mask));
6917         /* Default to all rates enabled */
6918         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6919                 sband = rdev->wiphy.bands[i];
6920                 mask.control[i].legacy =
6921                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6922                 if (sband)
6923                         memcpy(mask.control[i].mcs,
6924                                sband->ht_cap.mcs.rx_mask,
6925                                sizeof(mask.control[i].mcs));
6926                 else
6927                         memset(mask.control[i].mcs, 0,
6928                                sizeof(mask.control[i].mcs));
6929         }
6930
6931         /*
6932          * The nested attribute uses enum nl80211_band as the index. This maps
6933          * directly to the enum ieee80211_band values used in cfg80211.
6934          */
6935         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6936         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6937         {
6938                 enum ieee80211_band band = nla_type(tx_rates);
6939                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6940                         return -EINVAL;
6941                 sband = rdev->wiphy.bands[band];
6942                 if (sband == NULL)
6943                         return -EINVAL;
6944                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6945                           nla_len(tx_rates), nl80211_txattr_policy);
6946                 if (tb[NL80211_TXRATE_LEGACY]) {
6947                         mask.control[band].legacy = rateset_to_mask(
6948                                 sband,
6949                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6950                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6951                         if ((mask.control[band].legacy == 0) &&
6952                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6953                                 return -EINVAL;
6954                 }
6955                 if (tb[NL80211_TXRATE_MCS]) {
6956                         if (!ht_rateset_to_mask(
6957                                         sband,
6958                                         nla_data(tb[NL80211_TXRATE_MCS]),
6959                                         nla_len(tb[NL80211_TXRATE_MCS]),
6960                                         mask.control[band].mcs))
6961                                 return -EINVAL;
6962                 }
6963
6964                 if (mask.control[band].legacy == 0) {
6965                         /* don't allow empty legacy rates if HT
6966                          * is not even supported. */
6967                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6968                                 return -EINVAL;
6969
6970                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6971                                 if (mask.control[band].mcs[i])
6972                                         break;
6973
6974                         /* legacy and mcs rates may not be both empty */
6975                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6976                                 return -EINVAL;
6977                 }
6978         }
6979
6980         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6981 }
6982
6983 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6984 {
6985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6986         struct wireless_dev *wdev = info->user_ptr[1];
6987         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6988
6989         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6990                 return -EINVAL;
6991
6992         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6993                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6994
6995         switch (wdev->iftype) {
6996         case NL80211_IFTYPE_STATION:
6997         case NL80211_IFTYPE_ADHOC:
6998         case NL80211_IFTYPE_P2P_CLIENT:
6999         case NL80211_IFTYPE_AP:
7000         case NL80211_IFTYPE_AP_VLAN:
7001         case NL80211_IFTYPE_MESH_POINT:
7002         case NL80211_IFTYPE_P2P_GO:
7003         case NL80211_IFTYPE_P2P_DEVICE:
7004                 break;
7005         default:
7006                 return -EOPNOTSUPP;
7007         }
7008
7009         /* not much point in registering if we can't reply */
7010         if (!rdev->ops->mgmt_tx)
7011                 return -EOPNOTSUPP;
7012
7013         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
7014                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
7015                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
7016 }
7017
7018 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
7019 {
7020         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7021         struct wireless_dev *wdev = info->user_ptr[1];
7022         struct cfg80211_chan_def chandef;
7023         int err;
7024         void *hdr = NULL;
7025         u64 cookie;
7026         struct sk_buff *msg = NULL;
7027         unsigned int wait = 0;
7028         bool offchan, no_cck, dont_wait_for_ack;
7029
7030         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
7031
7032         if (!info->attrs[NL80211_ATTR_FRAME])
7033                 return -EINVAL;
7034
7035         if (!rdev->ops->mgmt_tx)
7036                 return -EOPNOTSUPP;
7037
7038         switch (wdev->iftype) {
7039         case NL80211_IFTYPE_STATION:
7040         case NL80211_IFTYPE_ADHOC:
7041         case NL80211_IFTYPE_P2P_CLIENT:
7042         case NL80211_IFTYPE_AP:
7043         case NL80211_IFTYPE_AP_VLAN:
7044         case NL80211_IFTYPE_MESH_POINT:
7045         case NL80211_IFTYPE_P2P_GO:
7046         case NL80211_IFTYPE_P2P_DEVICE:
7047                 break;
7048         default:
7049                 return -EOPNOTSUPP;
7050         }
7051
7052         if (info->attrs[NL80211_ATTR_DURATION]) {
7053                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7054                         return -EINVAL;
7055                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
7056
7057                 /*
7058                  * We should wait on the channel for at least a minimum amount
7059                  * of time (10ms) but no longer than the driver supports.
7060                  */
7061                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
7062                     wait > rdev->wiphy.max_remain_on_channel_duration)
7063                         return -EINVAL;
7064
7065         }
7066
7067         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
7068
7069         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
7070                 return -EINVAL;
7071
7072         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
7073
7074         err = nl80211_parse_chandef(rdev, info, &chandef);
7075         if (err)
7076                 return err;
7077
7078         if (!dont_wait_for_ack) {
7079                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7080                 if (!msg)
7081                         return -ENOMEM;
7082
7083                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7084                                      NL80211_CMD_FRAME);
7085
7086                 if (IS_ERR(hdr)) {
7087                         err = PTR_ERR(hdr);
7088                         goto free_msg;
7089                 }
7090         }
7091
7092         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
7093                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
7094                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
7095                                     no_cck, dont_wait_for_ack, &cookie);
7096         if (err)
7097                 goto free_msg;
7098
7099         if (msg) {
7100                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7101                         goto nla_put_failure;
7102
7103                 genlmsg_end(msg, hdr);
7104                 return genlmsg_reply(msg, info);
7105         }
7106
7107         return 0;
7108
7109  nla_put_failure:
7110         err = -ENOBUFS;
7111  free_msg:
7112         nlmsg_free(msg);
7113         return err;
7114 }
7115
7116 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
7117 {
7118         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7119         struct wireless_dev *wdev = info->user_ptr[1];
7120         u64 cookie;
7121
7122         if (!info->attrs[NL80211_ATTR_COOKIE])
7123                 return -EINVAL;
7124
7125         if (!rdev->ops->mgmt_tx_cancel_wait)
7126                 return -EOPNOTSUPP;
7127
7128         switch (wdev->iftype) {
7129         case NL80211_IFTYPE_STATION:
7130         case NL80211_IFTYPE_ADHOC:
7131         case NL80211_IFTYPE_P2P_CLIENT:
7132         case NL80211_IFTYPE_AP:
7133         case NL80211_IFTYPE_AP_VLAN:
7134         case NL80211_IFTYPE_P2P_GO:
7135         case NL80211_IFTYPE_P2P_DEVICE:
7136                 break;
7137         default:
7138                 return -EOPNOTSUPP;
7139         }
7140
7141         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
7142
7143         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
7144 }
7145
7146 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
7147 {
7148         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7149         struct wireless_dev *wdev;
7150         struct net_device *dev = info->user_ptr[1];
7151         u8 ps_state;
7152         bool state;
7153         int err;
7154
7155         if (!info->attrs[NL80211_ATTR_PS_STATE])
7156                 return -EINVAL;
7157
7158         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
7159
7160         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
7161                 return -EINVAL;
7162
7163         wdev = dev->ieee80211_ptr;
7164
7165         if (!rdev->ops->set_power_mgmt)
7166                 return -EOPNOTSUPP;
7167
7168         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
7169
7170         if (state == wdev->ps)
7171                 return 0;
7172
7173         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
7174         if (!err)
7175                 wdev->ps = state;
7176         return err;
7177 }
7178
7179 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
7180 {
7181         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7182         enum nl80211_ps_state ps_state;
7183         struct wireless_dev *wdev;
7184         struct net_device *dev = info->user_ptr[1];
7185         struct sk_buff *msg;
7186         void *hdr;
7187         int err;
7188
7189         wdev = dev->ieee80211_ptr;
7190
7191         if (!rdev->ops->set_power_mgmt)
7192                 return -EOPNOTSUPP;
7193
7194         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7195         if (!msg)
7196                 return -ENOMEM;
7197
7198         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7199                              NL80211_CMD_GET_POWER_SAVE);
7200         if (!hdr) {
7201                 err = -ENOBUFS;
7202                 goto free_msg;
7203         }
7204
7205         if (wdev->ps)
7206                 ps_state = NL80211_PS_ENABLED;
7207         else
7208                 ps_state = NL80211_PS_DISABLED;
7209
7210         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
7211                 goto nla_put_failure;
7212
7213         genlmsg_end(msg, hdr);
7214         return genlmsg_reply(msg, info);
7215
7216  nla_put_failure:
7217         err = -ENOBUFS;
7218  free_msg:
7219         nlmsg_free(msg);
7220         return err;
7221 }
7222
7223 static struct nla_policy
7224 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
7225         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
7226         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
7227         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
7228         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
7229         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
7230         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
7231 };
7232
7233 static int nl80211_set_cqm_txe(struct genl_info *info,
7234                                u32 rate, u32 pkts, u32 intvl)
7235 {
7236         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7237         struct wireless_dev *wdev;
7238         struct net_device *dev = info->user_ptr[1];
7239
7240         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
7241                 return -EINVAL;
7242
7243         wdev = dev->ieee80211_ptr;
7244
7245         if (!rdev->ops->set_cqm_txe_config)
7246                 return -EOPNOTSUPP;
7247
7248         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7249             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7250                 return -EOPNOTSUPP;
7251
7252         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
7253 }
7254
7255 static int nl80211_set_cqm_rssi(struct genl_info *info,
7256                                 s32 threshold, u32 hysteresis)
7257 {
7258         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7259         struct wireless_dev *wdev;
7260         struct net_device *dev = info->user_ptr[1];
7261
7262         if (threshold > 0)
7263                 return -EINVAL;
7264
7265         wdev = dev->ieee80211_ptr;
7266
7267         if (!rdev->ops->set_cqm_rssi_config)
7268                 return -EOPNOTSUPP;
7269
7270         if (wdev->iftype != NL80211_IFTYPE_STATION &&
7271             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
7272                 return -EOPNOTSUPP;
7273
7274         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
7275 }
7276
7277 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
7278 {
7279         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
7280         struct nlattr *cqm;
7281         int err;
7282
7283         cqm = info->attrs[NL80211_ATTR_CQM];
7284         if (!cqm) {
7285                 err = -EINVAL;
7286                 goto out;
7287         }
7288
7289         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7290                                nl80211_attr_cqm_policy);
7291         if (err)
7292                 goto out;
7293
7294         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7295             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7296                 s32 threshold;
7297                 u32 hysteresis;
7298                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7299                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7300                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7301         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7302                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7303                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7304                 u32 rate, pkts, intvl;
7305                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7306                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7307                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7308                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7309         } else
7310                 err = -EINVAL;
7311
7312 out:
7313         return err;
7314 }
7315
7316 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7317 {
7318         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7319         struct net_device *dev = info->user_ptr[1];
7320         struct mesh_config cfg;
7321         struct mesh_setup setup;
7322         int err;
7323
7324         /* start with default */
7325         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7326         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7327
7328         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7329                 /* and parse parameters if given */
7330                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7331                 if (err)
7332                         return err;
7333         }
7334
7335         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7336             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7337                 return -EINVAL;
7338
7339         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7340         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7341
7342         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7343             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7344                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7345                         return -EINVAL;
7346
7347         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7348                 setup.beacon_interval =
7349                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7350                 if (setup.beacon_interval < 10 ||
7351                     setup.beacon_interval > 10000)
7352                         return -EINVAL;
7353         }
7354
7355         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7356                 setup.dtim_period =
7357                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7358                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7359                         return -EINVAL;
7360         }
7361
7362         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7363                 /* parse additional setup parameters if given */
7364                 err = nl80211_parse_mesh_setup(info, &setup);
7365                 if (err)
7366                         return err;
7367         }
7368
7369         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7370                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7371                 if (err)
7372                         return err;
7373         } else {
7374                 /* cfg80211_join_mesh() will sort it out */
7375                 setup.chandef.chan = NULL;
7376         }
7377
7378         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7379 }
7380
7381 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7382 {
7383         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7384         struct net_device *dev = info->user_ptr[1];
7385
7386         return cfg80211_leave_mesh(rdev, dev);
7387 }
7388
7389 #ifdef CONFIG_PM
7390 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7391                                         struct cfg80211_registered_device *rdev)
7392 {
7393         struct nlattr *nl_pats, *nl_pat;
7394         int i, pat_len;
7395
7396         if (!rdev->wowlan->n_patterns)
7397                 return 0;
7398
7399         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7400         if (!nl_pats)
7401                 return -ENOBUFS;
7402
7403         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7404                 nl_pat = nla_nest_start(msg, i + 1);
7405                 if (!nl_pat)
7406                         return -ENOBUFS;
7407                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7408                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7409                             DIV_ROUND_UP(pat_len, 8),
7410                             rdev->wowlan->patterns[i].mask) ||
7411                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7412                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7413                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7414                                 rdev->wowlan->patterns[i].pkt_offset))
7415                         return -ENOBUFS;
7416                 nla_nest_end(msg, nl_pat);
7417         }
7418         nla_nest_end(msg, nl_pats);
7419
7420         return 0;
7421 }
7422
7423 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7424                                    struct cfg80211_wowlan_tcp *tcp)
7425 {
7426         struct nlattr *nl_tcp;
7427
7428         if (!tcp)
7429                 return 0;
7430
7431         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7432         if (!nl_tcp)
7433                 return -ENOBUFS;
7434
7435         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7436             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7437             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7438             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7439             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7440             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7441                     tcp->payload_len, tcp->payload) ||
7442             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7443                         tcp->data_interval) ||
7444             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7445                     tcp->wake_len, tcp->wake_data) ||
7446             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7447                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7448                 return -ENOBUFS;
7449
7450         if (tcp->payload_seq.len &&
7451             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7452                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7453                 return -ENOBUFS;
7454
7455         if (tcp->payload_tok.len &&
7456             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7457                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7458                     &tcp->payload_tok))
7459                 return -ENOBUFS;
7460
7461         return 0;
7462 }
7463
7464 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7465 {
7466         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7467         struct sk_buff *msg;
7468         void *hdr;
7469         u32 size = NLMSG_DEFAULT_SIZE;
7470
7471         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7472             !rdev->wiphy.wowlan.tcp)
7473                 return -EOPNOTSUPP;
7474
7475         if (rdev->wowlan && rdev->wowlan->tcp) {
7476                 /* adjust size to have room for all the data */
7477                 size += rdev->wowlan->tcp->tokens_size +
7478                         rdev->wowlan->tcp->payload_len +
7479                         rdev->wowlan->tcp->wake_len +
7480                         rdev->wowlan->tcp->wake_len / 8;
7481         }
7482
7483         msg = nlmsg_new(size, GFP_KERNEL);
7484         if (!msg)
7485                 return -ENOMEM;
7486
7487         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7488                              NL80211_CMD_GET_WOWLAN);
7489         if (!hdr)
7490                 goto nla_put_failure;
7491
7492         if (rdev->wowlan) {
7493                 struct nlattr *nl_wowlan;
7494
7495                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7496                 if (!nl_wowlan)
7497                         goto nla_put_failure;
7498
7499                 if ((rdev->wowlan->any &&
7500                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7501                     (rdev->wowlan->disconnect &&
7502                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7503                     (rdev->wowlan->magic_pkt &&
7504                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7505                     (rdev->wowlan->gtk_rekey_failure &&
7506                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7507                     (rdev->wowlan->eap_identity_req &&
7508                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7509                     (rdev->wowlan->four_way_handshake &&
7510                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7511                     (rdev->wowlan->rfkill_release &&
7512                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7513                         goto nla_put_failure;
7514
7515                 if (nl80211_send_wowlan_patterns(msg, rdev))
7516                         goto nla_put_failure;
7517
7518                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7519                         goto nla_put_failure;
7520
7521                 nla_nest_end(msg, nl_wowlan);
7522         }
7523
7524         genlmsg_end(msg, hdr);
7525         return genlmsg_reply(msg, info);
7526
7527 nla_put_failure:
7528         nlmsg_free(msg);
7529         return -ENOBUFS;
7530 }
7531
7532 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7533                                     struct nlattr *attr,
7534                                     struct cfg80211_wowlan *trig)
7535 {
7536         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7537         struct cfg80211_wowlan_tcp *cfg;
7538         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7539         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7540         u32 size;
7541         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7542         int err, port;
7543
7544         if (!rdev->wiphy.wowlan.tcp)
7545                 return -EINVAL;
7546
7547         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7548                         nla_data(attr), nla_len(attr),
7549                         nl80211_wowlan_tcp_policy);
7550         if (err)
7551                 return err;
7552
7553         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7554             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7555             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7556             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7557             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7558             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7559             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7560             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7561                 return -EINVAL;
7562
7563         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7564         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7565                 return -EINVAL;
7566
7567         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7568                         rdev->wiphy.wowlan.tcp->data_interval_max)
7569                 return -EINVAL;
7570
7571         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7572         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7573                 return -EINVAL;
7574
7575         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7576         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7577                 return -EINVAL;
7578
7579         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7580                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7581
7582                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7583                 tokens_size = tokln - sizeof(*tok);
7584
7585                 if (!tok->len || tokens_size % tok->len)
7586                         return -EINVAL;
7587                 if (!rdev->wiphy.wowlan.tcp->tok)
7588                         return -EINVAL;
7589                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7590                         return -EINVAL;
7591                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7592                         return -EINVAL;
7593                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7594                         return -EINVAL;
7595                 if (tok->offset + tok->len > data_size)
7596                         return -EINVAL;
7597         }
7598
7599         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7600                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7601                 if (!rdev->wiphy.wowlan.tcp->seq)
7602                         return -EINVAL;
7603                 if (seq->len == 0 || seq->len > 4)
7604                         return -EINVAL;
7605                 if (seq->len + seq->offset > data_size)
7606                         return -EINVAL;
7607         }
7608
7609         size = sizeof(*cfg);
7610         size += data_size;
7611         size += wake_size + wake_mask_size;
7612         size += tokens_size;
7613
7614         cfg = kzalloc(size, GFP_KERNEL);
7615         if (!cfg)
7616                 return -ENOMEM;
7617         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7618         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7619         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7620                ETH_ALEN);
7621         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7622                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7623         else
7624                 port = 0;
7625 #ifdef CONFIG_INET
7626         /* allocate a socket and port for it and use it */
7627         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7628                             IPPROTO_TCP, &cfg->sock, 1);
7629         if (err) {
7630                 kfree(cfg);
7631                 return err;
7632         }
7633         if (inet_csk_get_port(cfg->sock->sk, port)) {
7634                 sock_release(cfg->sock);
7635                 kfree(cfg);
7636                 return -EADDRINUSE;
7637         }
7638         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7639 #else
7640         if (!port) {
7641                 kfree(cfg);
7642                 return -EINVAL;
7643         }
7644         cfg->src_port = port;
7645 #endif
7646
7647         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7648         cfg->payload_len = data_size;
7649         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7650         memcpy((void *)cfg->payload,
7651                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7652                data_size);
7653         if (seq)
7654                 cfg->payload_seq = *seq;
7655         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7656         cfg->wake_len = wake_size;
7657         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7658         memcpy((void *)cfg->wake_data,
7659                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7660                wake_size);
7661         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7662                          data_size + wake_size;
7663         memcpy((void *)cfg->wake_mask,
7664                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7665                wake_mask_size);
7666         if (tok) {
7667                 cfg->tokens_size = tokens_size;
7668                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7669         }
7670
7671         trig->tcp = cfg;
7672
7673         return 0;
7674 }
7675
7676 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7677 {
7678         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7679         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7680         struct cfg80211_wowlan new_triggers = {};
7681         struct cfg80211_wowlan *ntrig;
7682         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7683         int err, i;
7684         bool prev_enabled = rdev->wowlan;
7685
7686         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7687             !rdev->wiphy.wowlan.tcp)
7688                 return -EOPNOTSUPP;
7689
7690         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7691                 cfg80211_rdev_free_wowlan(rdev);
7692                 rdev->wowlan = NULL;
7693                 goto set_wakeup;
7694         }
7695
7696         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7697                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7698                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7699                         nl80211_wowlan_policy);
7700         if (err)
7701                 return err;
7702
7703         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7704                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7705                         return -EINVAL;
7706                 new_triggers.any = true;
7707         }
7708
7709         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7710                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7711                         return -EINVAL;
7712                 new_triggers.disconnect = true;
7713         }
7714
7715         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7716                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7717                         return -EINVAL;
7718                 new_triggers.magic_pkt = true;
7719         }
7720
7721         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7722                 return -EINVAL;
7723
7724         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7725                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7726                         return -EINVAL;
7727                 new_triggers.gtk_rekey_failure = true;
7728         }
7729
7730         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7731                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7732                         return -EINVAL;
7733                 new_triggers.eap_identity_req = true;
7734         }
7735
7736         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7737                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7738                         return -EINVAL;
7739                 new_triggers.four_way_handshake = true;
7740         }
7741
7742         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7743                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7744                         return -EINVAL;
7745                 new_triggers.rfkill_release = true;
7746         }
7747
7748         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7749                 struct nlattr *pat;
7750                 int n_patterns = 0;
7751                 int rem, pat_len, mask_len, pkt_offset;
7752                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7753
7754                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7755                                     rem)
7756                         n_patterns++;
7757                 if (n_patterns > wowlan->n_patterns)
7758                         return -EINVAL;
7759
7760                 new_triggers.patterns = kcalloc(n_patterns,
7761                                                 sizeof(new_triggers.patterns[0]),
7762                                                 GFP_KERNEL);
7763                 if (!new_triggers.patterns)
7764                         return -ENOMEM;
7765
7766                 new_triggers.n_patterns = n_patterns;
7767                 i = 0;
7768
7769                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7770                                     rem) {
7771                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7772                                   nla_data(pat), nla_len(pat), NULL);
7773                         err = -EINVAL;
7774                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7775                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7776                                 goto error;
7777                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7778                         mask_len = DIV_ROUND_UP(pat_len, 8);
7779                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7780                             mask_len)
7781                                 goto error;
7782                         if (pat_len > wowlan->pattern_max_len ||
7783                             pat_len < wowlan->pattern_min_len)
7784                                 goto error;
7785
7786                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7787                                 pkt_offset = 0;
7788                         else
7789                                 pkt_offset = nla_get_u32(
7790                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7791                         if (pkt_offset > wowlan->max_pkt_offset)
7792                                 goto error;
7793                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7794
7795                         new_triggers.patterns[i].mask =
7796                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7797                         if (!new_triggers.patterns[i].mask) {
7798                                 err = -ENOMEM;
7799                                 goto error;
7800                         }
7801                         new_triggers.patterns[i].pattern =
7802                                 new_triggers.patterns[i].mask + mask_len;
7803                         memcpy(new_triggers.patterns[i].mask,
7804                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7805                                mask_len);
7806                         new_triggers.patterns[i].pattern_len = pat_len;
7807                         memcpy(new_triggers.patterns[i].pattern,
7808                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7809                                pat_len);
7810                         i++;
7811                 }
7812         }
7813
7814         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7815                 err = nl80211_parse_wowlan_tcp(
7816                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7817                         &new_triggers);
7818                 if (err)
7819                         goto error;
7820         }
7821
7822         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7823         if (!ntrig) {
7824                 err = -ENOMEM;
7825                 goto error;
7826         }
7827         cfg80211_rdev_free_wowlan(rdev);
7828         rdev->wowlan = ntrig;
7829
7830  set_wakeup:
7831         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7832                 rdev_set_wakeup(rdev, rdev->wowlan);
7833
7834         return 0;
7835  error:
7836         for (i = 0; i < new_triggers.n_patterns; i++)
7837                 kfree(new_triggers.patterns[i].mask);
7838         kfree(new_triggers.patterns);
7839         if (new_triggers.tcp && new_triggers.tcp->sock)
7840                 sock_release(new_triggers.tcp->sock);
7841         kfree(new_triggers.tcp);
7842         return err;
7843 }
7844 #endif
7845
7846 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7847 {
7848         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7849         struct net_device *dev = info->user_ptr[1];
7850         struct wireless_dev *wdev = dev->ieee80211_ptr;
7851         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7852         struct cfg80211_gtk_rekey_data rekey_data;
7853         int err;
7854
7855         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7856                 return -EINVAL;
7857
7858         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7859                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7860                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7861                         nl80211_rekey_policy);
7862         if (err)
7863                 return err;
7864
7865         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7866                 return -ERANGE;
7867         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7868                 return -ERANGE;
7869         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7870                 return -ERANGE;
7871
7872         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7873                NL80211_KEK_LEN);
7874         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7875                NL80211_KCK_LEN);
7876         memcpy(rekey_data.replay_ctr,
7877                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7878                NL80211_REPLAY_CTR_LEN);
7879
7880         wdev_lock(wdev);
7881         if (!wdev->current_bss) {
7882                 err = -ENOTCONN;
7883                 goto out;
7884         }
7885
7886         if (!rdev->ops->set_rekey_data) {
7887                 err = -EOPNOTSUPP;
7888                 goto out;
7889         }
7890
7891         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7892  out:
7893         wdev_unlock(wdev);
7894         return err;
7895 }
7896
7897 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
7898                                              struct genl_info *info)
7899 {
7900         struct net_device *dev = info->user_ptr[1];
7901         struct wireless_dev *wdev = dev->ieee80211_ptr;
7902
7903         if (wdev->iftype != NL80211_IFTYPE_AP &&
7904             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7905                 return -EINVAL;
7906
7907         if (wdev->ap_unexpected_nlportid)
7908                 return -EBUSY;
7909
7910         wdev->ap_unexpected_nlportid = info->snd_portid;
7911         return 0;
7912 }
7913
7914 static int nl80211_probe_client(struct sk_buff *skb,
7915                                 struct genl_info *info)
7916 {
7917         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7918         struct net_device *dev = info->user_ptr[1];
7919         struct wireless_dev *wdev = dev->ieee80211_ptr;
7920         struct sk_buff *msg;
7921         void *hdr;
7922         const u8 *addr;
7923         u64 cookie;
7924         int err;
7925
7926         if (wdev->iftype != NL80211_IFTYPE_AP &&
7927             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7928                 return -EOPNOTSUPP;
7929
7930         if (!info->attrs[NL80211_ATTR_MAC])
7931                 return -EINVAL;
7932
7933         if (!rdev->ops->probe_client)
7934                 return -EOPNOTSUPP;
7935
7936         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7937         if (!msg)
7938                 return -ENOMEM;
7939
7940         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7941                              NL80211_CMD_PROBE_CLIENT);
7942
7943         if (IS_ERR(hdr)) {
7944                 err = PTR_ERR(hdr);
7945                 goto free_msg;
7946         }
7947
7948         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7949
7950         err = rdev_probe_client(rdev, dev, addr, &cookie);
7951         if (err)
7952                 goto free_msg;
7953
7954         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7955                 goto nla_put_failure;
7956
7957         genlmsg_end(msg, hdr);
7958
7959         return genlmsg_reply(msg, info);
7960
7961  nla_put_failure:
7962         err = -ENOBUFS;
7963  free_msg:
7964         nlmsg_free(msg);
7965         return err;
7966 }
7967
7968 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7969 {
7970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7971         struct cfg80211_beacon_registration *reg, *nreg;
7972         int rv;
7973
7974         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7975                 return -EOPNOTSUPP;
7976
7977         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7978         if (!nreg)
7979                 return -ENOMEM;
7980
7981         /* First, check if already registered. */
7982         spin_lock_bh(&rdev->beacon_registrations_lock);
7983         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7984                 if (reg->nlportid == info->snd_portid) {
7985                         rv = -EALREADY;
7986                         goto out_err;
7987                 }
7988         }
7989         /* Add it to the list */
7990         nreg->nlportid = info->snd_portid;
7991         list_add(&nreg->list, &rdev->beacon_registrations);
7992
7993         spin_unlock_bh(&rdev->beacon_registrations_lock);
7994
7995         return 0;
7996 out_err:
7997         spin_unlock_bh(&rdev->beacon_registrations_lock);
7998         kfree(nreg);
7999         return rv;
8000 }
8001
8002 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
8003 {
8004         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8005         struct wireless_dev *wdev = info->user_ptr[1];
8006         int err;
8007
8008         if (!rdev->ops->start_p2p_device)
8009                 return -EOPNOTSUPP;
8010
8011         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8012                 return -EOPNOTSUPP;
8013
8014         if (wdev->p2p_started)
8015                 return 0;
8016
8017         mutex_lock(&rdev->devlist_mtx);
8018         err = cfg80211_can_add_interface(rdev, wdev->iftype);
8019         mutex_unlock(&rdev->devlist_mtx);
8020         if (err)
8021                 return err;
8022
8023         err = rdev_start_p2p_device(rdev, wdev);
8024         if (err)
8025                 return err;
8026
8027         wdev->p2p_started = true;
8028         mutex_lock(&rdev->devlist_mtx);
8029         rdev->opencount++;
8030         mutex_unlock(&rdev->devlist_mtx);
8031
8032         return 0;
8033 }
8034
8035 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
8036 {
8037         struct cfg80211_registered_device *rdev = info->user_ptr[0];
8038         struct wireless_dev *wdev = info->user_ptr[1];
8039
8040         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
8041                 return -EOPNOTSUPP;
8042
8043         if (!rdev->ops->stop_p2p_device)
8044                 return -EOPNOTSUPP;
8045
8046         if (!wdev->p2p_started)
8047                 return 0;
8048
8049         rdev_stop_p2p_device(rdev, wdev);
8050         wdev->p2p_started = false;
8051
8052         mutex_lock(&rdev->devlist_mtx);
8053         rdev->opencount--;
8054         mutex_unlock(&rdev->devlist_mtx);
8055
8056         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
8057                 rdev->scan_req->aborted = true;
8058                 ___cfg80211_scan_done(rdev, true);
8059         }
8060
8061         return 0;
8062 }
8063
8064 static int nl80211_get_protocol_features(struct sk_buff *skb,
8065                                          struct genl_info *info)
8066 {
8067         void *hdr;
8068         struct sk_buff *msg;
8069
8070         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8071         if (!msg)
8072                 return -ENOMEM;
8073
8074         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
8075                              NL80211_CMD_GET_PROTOCOL_FEATURES);
8076         if (!hdr)
8077                 goto nla_put_failure;
8078
8079         if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
8080                         NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
8081                 goto nla_put_failure;
8082
8083         genlmsg_end(msg, hdr);
8084         return genlmsg_reply(msg, info);
8085
8086  nla_put_failure:
8087         kfree_skb(msg);
8088         return -ENOBUFS;
8089 }
8090
8091 #define NL80211_FLAG_NEED_WIPHY         0x01
8092 #define NL80211_FLAG_NEED_NETDEV        0x02
8093 #define NL80211_FLAG_NEED_RTNL          0x04
8094 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
8095 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
8096                                          NL80211_FLAG_CHECK_NETDEV_UP)
8097 #define NL80211_FLAG_NEED_WDEV          0x10
8098 /* If a netdev is associated, it must be UP, P2P must be started */
8099 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
8100                                          NL80211_FLAG_CHECK_NETDEV_UP)
8101
8102 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
8103                             struct genl_info *info)
8104 {
8105         struct cfg80211_registered_device *rdev;
8106         struct wireless_dev *wdev;
8107         struct net_device *dev;
8108         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
8109
8110         if (rtnl)
8111                 rtnl_lock();
8112
8113         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
8114                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
8115                 if (IS_ERR(rdev)) {
8116                         if (rtnl)
8117                                 rtnl_unlock();
8118                         return PTR_ERR(rdev);
8119                 }
8120                 info->user_ptr[0] = rdev;
8121         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
8122                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8123                 mutex_lock(&cfg80211_mutex);
8124                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
8125                                                   info->attrs);
8126                 if (IS_ERR(wdev)) {
8127                         mutex_unlock(&cfg80211_mutex);
8128                         if (rtnl)
8129                                 rtnl_unlock();
8130                         return PTR_ERR(wdev);
8131                 }
8132
8133                 dev = wdev->netdev;
8134                 rdev = wiphy_to_dev(wdev->wiphy);
8135
8136                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
8137                         if (!dev) {
8138                                 mutex_unlock(&cfg80211_mutex);
8139                                 if (rtnl)
8140                                         rtnl_unlock();
8141                                 return -EINVAL;
8142                         }
8143
8144                         info->user_ptr[1] = dev;
8145                 } else {
8146                         info->user_ptr[1] = wdev;
8147                 }
8148
8149                 if (dev) {
8150                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
8151                             !netif_running(dev)) {
8152                                 mutex_unlock(&cfg80211_mutex);
8153                                 if (rtnl)
8154                                         rtnl_unlock();
8155                                 return -ENETDOWN;
8156                         }
8157
8158                         dev_hold(dev);
8159                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
8160                         if (!wdev->p2p_started) {
8161                                 mutex_unlock(&cfg80211_mutex);
8162                                 if (rtnl)
8163                                         rtnl_unlock();
8164                                 return -ENETDOWN;
8165                         }
8166                 }
8167
8168                 cfg80211_lock_rdev(rdev);
8169
8170                 mutex_unlock(&cfg80211_mutex);
8171
8172                 info->user_ptr[0] = rdev;
8173         }
8174
8175         return 0;
8176 }
8177
8178 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
8179                               struct genl_info *info)
8180 {
8181         if (info->user_ptr[0])
8182                 cfg80211_unlock_rdev(info->user_ptr[0]);
8183         if (info->user_ptr[1]) {
8184                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
8185                         struct wireless_dev *wdev = info->user_ptr[1];
8186
8187                         if (wdev->netdev)
8188                                 dev_put(wdev->netdev);
8189                 } else {
8190                         dev_put(info->user_ptr[1]);
8191                 }
8192         }
8193         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
8194                 rtnl_unlock();
8195 }
8196
8197 static struct genl_ops nl80211_ops[] = {
8198         {
8199                 .cmd = NL80211_CMD_GET_WIPHY,
8200                 .doit = nl80211_get_wiphy,
8201                 .dumpit = nl80211_dump_wiphy,
8202                 .policy = nl80211_policy,
8203                 /* can be retrieved by unprivileged users */
8204                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
8205         },
8206         {
8207                 .cmd = NL80211_CMD_SET_WIPHY,
8208                 .doit = nl80211_set_wiphy,
8209                 .policy = nl80211_policy,
8210                 .flags = GENL_ADMIN_PERM,
8211                 .internal_flags = NL80211_FLAG_NEED_RTNL,
8212         },
8213         {
8214                 .cmd = NL80211_CMD_GET_INTERFACE,
8215                 .doit = nl80211_get_interface,
8216                 .dumpit = nl80211_dump_interface,
8217                 .policy = nl80211_policy,
8218                 /* can be retrieved by unprivileged users */
8219                 .internal_flags = NL80211_FLAG_NEED_WDEV,
8220         },
8221         {
8222                 .cmd = NL80211_CMD_SET_INTERFACE,
8223                 .doit = nl80211_set_interface,
8224                 .policy = nl80211_policy,
8225                 .flags = GENL_ADMIN_PERM,
8226                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8227                                   NL80211_FLAG_NEED_RTNL,
8228         },
8229         {
8230                 .cmd = NL80211_CMD_NEW_INTERFACE,
8231                 .doit = nl80211_new_interface,
8232                 .policy = nl80211_policy,
8233                 .flags = GENL_ADMIN_PERM,
8234                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8235                                   NL80211_FLAG_NEED_RTNL,
8236         },
8237         {
8238                 .cmd = NL80211_CMD_DEL_INTERFACE,
8239                 .doit = nl80211_del_interface,
8240                 .policy = nl80211_policy,
8241                 .flags = GENL_ADMIN_PERM,
8242                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8243                                   NL80211_FLAG_NEED_RTNL,
8244         },
8245         {
8246                 .cmd = NL80211_CMD_GET_KEY,
8247                 .doit = nl80211_get_key,
8248                 .policy = nl80211_policy,
8249                 .flags = GENL_ADMIN_PERM,
8250                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8251                                   NL80211_FLAG_NEED_RTNL,
8252         },
8253         {
8254                 .cmd = NL80211_CMD_SET_KEY,
8255                 .doit = nl80211_set_key,
8256                 .policy = nl80211_policy,
8257                 .flags = GENL_ADMIN_PERM,
8258                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8259                                   NL80211_FLAG_NEED_RTNL,
8260         },
8261         {
8262                 .cmd = NL80211_CMD_NEW_KEY,
8263                 .doit = nl80211_new_key,
8264                 .policy = nl80211_policy,
8265                 .flags = GENL_ADMIN_PERM,
8266                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8267                                   NL80211_FLAG_NEED_RTNL,
8268         },
8269         {
8270                 .cmd = NL80211_CMD_DEL_KEY,
8271                 .doit = nl80211_del_key,
8272                 .policy = nl80211_policy,
8273                 .flags = GENL_ADMIN_PERM,
8274                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8275                                   NL80211_FLAG_NEED_RTNL,
8276         },
8277         {
8278                 .cmd = NL80211_CMD_SET_BEACON,
8279                 .policy = nl80211_policy,
8280                 .flags = GENL_ADMIN_PERM,
8281                 .doit = nl80211_set_beacon,
8282                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8283                                   NL80211_FLAG_NEED_RTNL,
8284         },
8285         {
8286                 .cmd = NL80211_CMD_START_AP,
8287                 .policy = nl80211_policy,
8288                 .flags = GENL_ADMIN_PERM,
8289                 .doit = nl80211_start_ap,
8290                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8291                                   NL80211_FLAG_NEED_RTNL,
8292         },
8293         {
8294                 .cmd = NL80211_CMD_STOP_AP,
8295                 .policy = nl80211_policy,
8296                 .flags = GENL_ADMIN_PERM,
8297                 .doit = nl80211_stop_ap,
8298                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8299                                   NL80211_FLAG_NEED_RTNL,
8300         },
8301         {
8302                 .cmd = NL80211_CMD_GET_STATION,
8303                 .doit = nl80211_get_station,
8304                 .dumpit = nl80211_dump_station,
8305                 .policy = nl80211_policy,
8306                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8307                                   NL80211_FLAG_NEED_RTNL,
8308         },
8309         {
8310                 .cmd = NL80211_CMD_SET_STATION,
8311                 .doit = nl80211_set_station,
8312                 .policy = nl80211_policy,
8313                 .flags = GENL_ADMIN_PERM,
8314                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8315                                   NL80211_FLAG_NEED_RTNL,
8316         },
8317         {
8318                 .cmd = NL80211_CMD_NEW_STATION,
8319                 .doit = nl80211_new_station,
8320                 .policy = nl80211_policy,
8321                 .flags = GENL_ADMIN_PERM,
8322                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8323                                   NL80211_FLAG_NEED_RTNL,
8324         },
8325         {
8326                 .cmd = NL80211_CMD_DEL_STATION,
8327                 .doit = nl80211_del_station,
8328                 .policy = nl80211_policy,
8329                 .flags = GENL_ADMIN_PERM,
8330                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8331                                   NL80211_FLAG_NEED_RTNL,
8332         },
8333         {
8334                 .cmd = NL80211_CMD_GET_MPATH,
8335                 .doit = nl80211_get_mpath,
8336                 .dumpit = nl80211_dump_mpath,
8337                 .policy = nl80211_policy,
8338                 .flags = GENL_ADMIN_PERM,
8339                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8340                                   NL80211_FLAG_NEED_RTNL,
8341         },
8342         {
8343                 .cmd = NL80211_CMD_SET_MPATH,
8344                 .doit = nl80211_set_mpath,
8345                 .policy = nl80211_policy,
8346                 .flags = GENL_ADMIN_PERM,
8347                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8348                                   NL80211_FLAG_NEED_RTNL,
8349         },
8350         {
8351                 .cmd = NL80211_CMD_NEW_MPATH,
8352                 .doit = nl80211_new_mpath,
8353                 .policy = nl80211_policy,
8354                 .flags = GENL_ADMIN_PERM,
8355                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8356                                   NL80211_FLAG_NEED_RTNL,
8357         },
8358         {
8359                 .cmd = NL80211_CMD_DEL_MPATH,
8360                 .doit = nl80211_del_mpath,
8361                 .policy = nl80211_policy,
8362                 .flags = GENL_ADMIN_PERM,
8363                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8364                                   NL80211_FLAG_NEED_RTNL,
8365         },
8366         {
8367                 .cmd = NL80211_CMD_SET_BSS,
8368                 .doit = nl80211_set_bss,
8369                 .policy = nl80211_policy,
8370                 .flags = GENL_ADMIN_PERM,
8371                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8372                                   NL80211_FLAG_NEED_RTNL,
8373         },
8374         {
8375                 .cmd = NL80211_CMD_GET_REG,
8376                 .doit = nl80211_get_reg,
8377                 .policy = nl80211_policy,
8378                 /* can be retrieved by unprivileged users */
8379         },
8380         {
8381                 .cmd = NL80211_CMD_SET_REG,
8382                 .doit = nl80211_set_reg,
8383                 .policy = nl80211_policy,
8384                 .flags = GENL_ADMIN_PERM,
8385         },
8386         {
8387                 .cmd = NL80211_CMD_REQ_SET_REG,
8388                 .doit = nl80211_req_set_reg,
8389                 .policy = nl80211_policy,
8390                 .flags = GENL_ADMIN_PERM,
8391         },
8392         {
8393                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8394                 .doit = nl80211_get_mesh_config,
8395                 .policy = nl80211_policy,
8396                 /* can be retrieved by unprivileged users */
8397                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8398                                   NL80211_FLAG_NEED_RTNL,
8399         },
8400         {
8401                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8402                 .doit = nl80211_update_mesh_config,
8403                 .policy = nl80211_policy,
8404                 .flags = GENL_ADMIN_PERM,
8405                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8406                                   NL80211_FLAG_NEED_RTNL,
8407         },
8408         {
8409                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8410                 .doit = nl80211_trigger_scan,
8411                 .policy = nl80211_policy,
8412                 .flags = GENL_ADMIN_PERM,
8413                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8414                                   NL80211_FLAG_NEED_RTNL,
8415         },
8416         {
8417                 .cmd = NL80211_CMD_GET_SCAN,
8418                 .policy = nl80211_policy,
8419                 .dumpit = nl80211_dump_scan,
8420         },
8421         {
8422                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8423                 .doit = nl80211_start_sched_scan,
8424                 .policy = nl80211_policy,
8425                 .flags = GENL_ADMIN_PERM,
8426                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8427                                   NL80211_FLAG_NEED_RTNL,
8428         },
8429         {
8430                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8431                 .doit = nl80211_stop_sched_scan,
8432                 .policy = nl80211_policy,
8433                 .flags = GENL_ADMIN_PERM,
8434                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8435                                   NL80211_FLAG_NEED_RTNL,
8436         },
8437         {
8438                 .cmd = NL80211_CMD_AUTHENTICATE,
8439                 .doit = nl80211_authenticate,
8440                 .policy = nl80211_policy,
8441                 .flags = GENL_ADMIN_PERM,
8442                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8443                                   NL80211_FLAG_NEED_RTNL,
8444         },
8445         {
8446                 .cmd = NL80211_CMD_ASSOCIATE,
8447                 .doit = nl80211_associate,
8448                 .policy = nl80211_policy,
8449                 .flags = GENL_ADMIN_PERM,
8450                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8451                                   NL80211_FLAG_NEED_RTNL,
8452         },
8453         {
8454                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8455                 .doit = nl80211_deauthenticate,
8456                 .policy = nl80211_policy,
8457                 .flags = GENL_ADMIN_PERM,
8458                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8459                                   NL80211_FLAG_NEED_RTNL,
8460         },
8461         {
8462                 .cmd = NL80211_CMD_DISASSOCIATE,
8463                 .doit = nl80211_disassociate,
8464                 .policy = nl80211_policy,
8465                 .flags = GENL_ADMIN_PERM,
8466                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8467                                   NL80211_FLAG_NEED_RTNL,
8468         },
8469         {
8470                 .cmd = NL80211_CMD_JOIN_IBSS,
8471                 .doit = nl80211_join_ibss,
8472                 .policy = nl80211_policy,
8473                 .flags = GENL_ADMIN_PERM,
8474                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8475                                   NL80211_FLAG_NEED_RTNL,
8476         },
8477         {
8478                 .cmd = NL80211_CMD_LEAVE_IBSS,
8479                 .doit = nl80211_leave_ibss,
8480                 .policy = nl80211_policy,
8481                 .flags = GENL_ADMIN_PERM,
8482                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8483                                   NL80211_FLAG_NEED_RTNL,
8484         },
8485 #ifdef CONFIG_NL80211_TESTMODE
8486         {
8487                 .cmd = NL80211_CMD_TESTMODE,
8488                 .doit = nl80211_testmode_do,
8489                 .dumpit = nl80211_testmode_dump,
8490                 .policy = nl80211_policy,
8491                 .flags = GENL_ADMIN_PERM,
8492                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8493                                   NL80211_FLAG_NEED_RTNL,
8494         },
8495 #endif
8496         {
8497                 .cmd = NL80211_CMD_CONNECT,
8498                 .doit = nl80211_connect,
8499                 .policy = nl80211_policy,
8500                 .flags = GENL_ADMIN_PERM,
8501                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8502                                   NL80211_FLAG_NEED_RTNL,
8503         },
8504         {
8505                 .cmd = NL80211_CMD_DISCONNECT,
8506                 .doit = nl80211_disconnect,
8507                 .policy = nl80211_policy,
8508                 .flags = GENL_ADMIN_PERM,
8509                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8510                                   NL80211_FLAG_NEED_RTNL,
8511         },
8512         {
8513                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8514                 .doit = nl80211_wiphy_netns,
8515                 .policy = nl80211_policy,
8516                 .flags = GENL_ADMIN_PERM,
8517                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8518                                   NL80211_FLAG_NEED_RTNL,
8519         },
8520         {
8521                 .cmd = NL80211_CMD_GET_SURVEY,
8522                 .policy = nl80211_policy,
8523                 .dumpit = nl80211_dump_survey,
8524         },
8525         {
8526                 .cmd = NL80211_CMD_SET_PMKSA,
8527                 .doit = nl80211_setdel_pmksa,
8528                 .policy = nl80211_policy,
8529                 .flags = GENL_ADMIN_PERM,
8530                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8531                                   NL80211_FLAG_NEED_RTNL,
8532         },
8533         {
8534                 .cmd = NL80211_CMD_DEL_PMKSA,
8535                 .doit = nl80211_setdel_pmksa,
8536                 .policy = nl80211_policy,
8537                 .flags = GENL_ADMIN_PERM,
8538                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8539                                   NL80211_FLAG_NEED_RTNL,
8540         },
8541         {
8542                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8543                 .doit = nl80211_flush_pmksa,
8544                 .policy = nl80211_policy,
8545                 .flags = GENL_ADMIN_PERM,
8546                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8547                                   NL80211_FLAG_NEED_RTNL,
8548         },
8549         {
8550                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8551                 .doit = nl80211_remain_on_channel,
8552                 .policy = nl80211_policy,
8553                 .flags = GENL_ADMIN_PERM,
8554                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8555                                   NL80211_FLAG_NEED_RTNL,
8556         },
8557         {
8558                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8559                 .doit = nl80211_cancel_remain_on_channel,
8560                 .policy = nl80211_policy,
8561                 .flags = GENL_ADMIN_PERM,
8562                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8563                                   NL80211_FLAG_NEED_RTNL,
8564         },
8565         {
8566                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8567                 .doit = nl80211_set_tx_bitrate_mask,
8568                 .policy = nl80211_policy,
8569                 .flags = GENL_ADMIN_PERM,
8570                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8571                                   NL80211_FLAG_NEED_RTNL,
8572         },
8573         {
8574                 .cmd = NL80211_CMD_REGISTER_FRAME,
8575                 .doit = nl80211_register_mgmt,
8576                 .policy = nl80211_policy,
8577                 .flags = GENL_ADMIN_PERM,
8578                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8579                                   NL80211_FLAG_NEED_RTNL,
8580         },
8581         {
8582                 .cmd = NL80211_CMD_FRAME,
8583                 .doit = nl80211_tx_mgmt,
8584                 .policy = nl80211_policy,
8585                 .flags = GENL_ADMIN_PERM,
8586                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8587                                   NL80211_FLAG_NEED_RTNL,
8588         },
8589         {
8590                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8591                 .doit = nl80211_tx_mgmt_cancel_wait,
8592                 .policy = nl80211_policy,
8593                 .flags = GENL_ADMIN_PERM,
8594                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8595                                   NL80211_FLAG_NEED_RTNL,
8596         },
8597         {
8598                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8599                 .doit = nl80211_set_power_save,
8600                 .policy = nl80211_policy,
8601                 .flags = GENL_ADMIN_PERM,
8602                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8603                                   NL80211_FLAG_NEED_RTNL,
8604         },
8605         {
8606                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8607                 .doit = nl80211_get_power_save,
8608                 .policy = nl80211_policy,
8609                 /* can be retrieved by unprivileged users */
8610                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8611                                   NL80211_FLAG_NEED_RTNL,
8612         },
8613         {
8614                 .cmd = NL80211_CMD_SET_CQM,
8615                 .doit = nl80211_set_cqm,
8616                 .policy = nl80211_policy,
8617                 .flags = GENL_ADMIN_PERM,
8618                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8619                                   NL80211_FLAG_NEED_RTNL,
8620         },
8621         {
8622                 .cmd = NL80211_CMD_SET_CHANNEL,
8623                 .doit = nl80211_set_channel,
8624                 .policy = nl80211_policy,
8625                 .flags = GENL_ADMIN_PERM,
8626                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8627                                   NL80211_FLAG_NEED_RTNL,
8628         },
8629         {
8630                 .cmd = NL80211_CMD_SET_WDS_PEER,
8631                 .doit = nl80211_set_wds_peer,
8632                 .policy = nl80211_policy,
8633                 .flags = GENL_ADMIN_PERM,
8634                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8635                                   NL80211_FLAG_NEED_RTNL,
8636         },
8637         {
8638                 .cmd = NL80211_CMD_JOIN_MESH,
8639                 .doit = nl80211_join_mesh,
8640                 .policy = nl80211_policy,
8641                 .flags = GENL_ADMIN_PERM,
8642                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8643                                   NL80211_FLAG_NEED_RTNL,
8644         },
8645         {
8646                 .cmd = NL80211_CMD_LEAVE_MESH,
8647                 .doit = nl80211_leave_mesh,
8648                 .policy = nl80211_policy,
8649                 .flags = GENL_ADMIN_PERM,
8650                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8651                                   NL80211_FLAG_NEED_RTNL,
8652         },
8653 #ifdef CONFIG_PM
8654         {
8655                 .cmd = NL80211_CMD_GET_WOWLAN,
8656                 .doit = nl80211_get_wowlan,
8657                 .policy = nl80211_policy,
8658                 /* can be retrieved by unprivileged users */
8659                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8660                                   NL80211_FLAG_NEED_RTNL,
8661         },
8662         {
8663                 .cmd = NL80211_CMD_SET_WOWLAN,
8664                 .doit = nl80211_set_wowlan,
8665                 .policy = nl80211_policy,
8666                 .flags = GENL_ADMIN_PERM,
8667                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8668                                   NL80211_FLAG_NEED_RTNL,
8669         },
8670 #endif
8671         {
8672                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8673                 .doit = nl80211_set_rekey_data,
8674                 .policy = nl80211_policy,
8675                 .flags = GENL_ADMIN_PERM,
8676                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8677                                   NL80211_FLAG_NEED_RTNL,
8678         },
8679         {
8680                 .cmd = NL80211_CMD_TDLS_MGMT,
8681                 .doit = nl80211_tdls_mgmt,
8682                 .policy = nl80211_policy,
8683                 .flags = GENL_ADMIN_PERM,
8684                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8685                                   NL80211_FLAG_NEED_RTNL,
8686         },
8687         {
8688                 .cmd = NL80211_CMD_TDLS_OPER,
8689                 .doit = nl80211_tdls_oper,
8690                 .policy = nl80211_policy,
8691                 .flags = GENL_ADMIN_PERM,
8692                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8693                                   NL80211_FLAG_NEED_RTNL,
8694         },
8695         {
8696                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8697                 .doit = nl80211_register_unexpected_frame,
8698                 .policy = nl80211_policy,
8699                 .flags = GENL_ADMIN_PERM,
8700                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8701                                   NL80211_FLAG_NEED_RTNL,
8702         },
8703         {
8704                 .cmd = NL80211_CMD_PROBE_CLIENT,
8705                 .doit = nl80211_probe_client,
8706                 .policy = nl80211_policy,
8707                 .flags = GENL_ADMIN_PERM,
8708                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8709                                   NL80211_FLAG_NEED_RTNL,
8710         },
8711         {
8712                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8713                 .doit = nl80211_register_beacons,
8714                 .policy = nl80211_policy,
8715                 .flags = GENL_ADMIN_PERM,
8716                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8717                                   NL80211_FLAG_NEED_RTNL,
8718         },
8719         {
8720                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8721                 .doit = nl80211_set_noack_map,
8722                 .policy = nl80211_policy,
8723                 .flags = GENL_ADMIN_PERM,
8724                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8725                                   NL80211_FLAG_NEED_RTNL,
8726         },
8727         {
8728                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8729                 .doit = nl80211_start_p2p_device,
8730                 .policy = nl80211_policy,
8731                 .flags = GENL_ADMIN_PERM,
8732                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8733                                   NL80211_FLAG_NEED_RTNL,
8734         },
8735         {
8736                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8737                 .doit = nl80211_stop_p2p_device,
8738                 .policy = nl80211_policy,
8739                 .flags = GENL_ADMIN_PERM,
8740                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8741                                   NL80211_FLAG_NEED_RTNL,
8742         },
8743         {
8744                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8745                 .doit = nl80211_set_mcast_rate,
8746                 .policy = nl80211_policy,
8747                 .flags = GENL_ADMIN_PERM,
8748                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8749                                   NL80211_FLAG_NEED_RTNL,
8750         },
8751         {
8752                 .cmd = NL80211_CMD_SET_MAC_ACL,
8753                 .doit = nl80211_set_mac_acl,
8754                 .policy = nl80211_policy,
8755                 .flags = GENL_ADMIN_PERM,
8756                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8757                                   NL80211_FLAG_NEED_RTNL,
8758         },
8759         {
8760                 .cmd = NL80211_CMD_RADAR_DETECT,
8761                 .doit = nl80211_start_radar_detection,
8762                 .policy = nl80211_policy,
8763                 .flags = GENL_ADMIN_PERM,
8764                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8765                                   NL80211_FLAG_NEED_RTNL,
8766         },
8767         {
8768                 .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
8769                 .doit = nl80211_get_protocol_features,
8770                 .policy = nl80211_policy,
8771         },
8772 };
8773
8774 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8775         .name = "mlme",
8776 };
8777
8778 /* multicast groups */
8779 static struct genl_multicast_group nl80211_config_mcgrp = {
8780         .name = "config",
8781 };
8782 static struct genl_multicast_group nl80211_scan_mcgrp = {
8783         .name = "scan",
8784 };
8785 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8786         .name = "regulatory",
8787 };
8788
8789 /* notification functions */
8790
8791 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8792 {
8793         struct sk_buff *msg;
8794
8795         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8796         if (!msg)
8797                 return;
8798
8799         if (nl80211_send_wiphy(rdev, msg, 0, 0, 0,
8800                                false, NULL, NULL, NULL) < 0) {
8801                 nlmsg_free(msg);
8802                 return;
8803         }
8804
8805         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8806                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8807 }
8808
8809 static int nl80211_add_scan_req(struct sk_buff *msg,
8810                                 struct cfg80211_registered_device *rdev)
8811 {
8812         struct cfg80211_scan_request *req = rdev->scan_req;
8813         struct nlattr *nest;
8814         int i;
8815
8816         ASSERT_RDEV_LOCK(rdev);
8817
8818         if (WARN_ON(!req))
8819                 return 0;
8820
8821         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8822         if (!nest)
8823                 goto nla_put_failure;
8824         for (i = 0; i < req->n_ssids; i++) {
8825                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8826                         goto nla_put_failure;
8827         }
8828         nla_nest_end(msg, nest);
8829
8830         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8831         if (!nest)
8832                 goto nla_put_failure;
8833         for (i = 0; i < req->n_channels; i++) {
8834                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8835                         goto nla_put_failure;
8836         }
8837         nla_nest_end(msg, nest);
8838
8839         if (req->ie &&
8840             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8841                 goto nla_put_failure;
8842
8843         if (req->flags)
8844                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8845
8846         return 0;
8847  nla_put_failure:
8848         return -ENOBUFS;
8849 }
8850
8851 static int nl80211_send_scan_msg(struct sk_buff *msg,
8852                                  struct cfg80211_registered_device *rdev,
8853                                  struct wireless_dev *wdev,
8854                                  u32 portid, u32 seq, int flags,
8855                                  u32 cmd)
8856 {
8857         void *hdr;
8858
8859         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8860         if (!hdr)
8861                 return -1;
8862
8863         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8864             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8865                                          wdev->netdev->ifindex)) ||
8866             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8867                 goto nla_put_failure;
8868
8869         /* ignore errors and send incomplete event anyway */
8870         nl80211_add_scan_req(msg, rdev);
8871
8872         return genlmsg_end(msg, hdr);
8873
8874  nla_put_failure:
8875         genlmsg_cancel(msg, hdr);
8876         return -EMSGSIZE;
8877 }
8878
8879 static int
8880 nl80211_send_sched_scan_msg(struct sk_buff *msg,
8881                             struct cfg80211_registered_device *rdev,
8882                             struct net_device *netdev,
8883                             u32 portid, u32 seq, int flags, u32 cmd)
8884 {
8885         void *hdr;
8886
8887         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8888         if (!hdr)
8889                 return -1;
8890
8891         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8892             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8893                 goto nla_put_failure;
8894
8895         return genlmsg_end(msg, hdr);
8896
8897  nla_put_failure:
8898         genlmsg_cancel(msg, hdr);
8899         return -EMSGSIZE;
8900 }
8901
8902 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
8903                              struct wireless_dev *wdev)
8904 {
8905         struct sk_buff *msg;
8906
8907         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8908         if (!msg)
8909                 return;
8910
8911         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8912                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
8913                 nlmsg_free(msg);
8914                 return;
8915         }
8916
8917         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8918                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8919 }
8920
8921 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
8922                             struct wireless_dev *wdev)
8923 {
8924         struct sk_buff *msg;
8925
8926         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8927         if (!msg)
8928                 return;
8929
8930         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8931                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
8932                 nlmsg_free(msg);
8933                 return;
8934         }
8935
8936         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8937                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8938 }
8939
8940 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
8941                                struct wireless_dev *wdev)
8942 {
8943         struct sk_buff *msg;
8944
8945         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8946         if (!msg)
8947                 return;
8948
8949         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8950                                   NL80211_CMD_SCAN_ABORTED) < 0) {
8951                 nlmsg_free(msg);
8952                 return;
8953         }
8954
8955         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8956                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8957 }
8958
8959 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
8960                                      struct net_device *netdev)
8961 {
8962         struct sk_buff *msg;
8963
8964         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8965         if (!msg)
8966                 return;
8967
8968         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
8969                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
8970                 nlmsg_free(msg);
8971                 return;
8972         }
8973
8974         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8975                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8976 }
8977
8978 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
8979                              struct net_device *netdev, u32 cmd)
8980 {
8981         struct sk_buff *msg;
8982
8983         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8984         if (!msg)
8985                 return;
8986
8987         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
8988                 nlmsg_free(msg);
8989                 return;
8990         }
8991
8992         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8993                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8994 }
8995
8996 /*
8997  * This can happen on global regulatory changes or device specific settings
8998  * based on custom world regulatory domains.
8999  */
9000 void nl80211_send_reg_change_event(struct regulatory_request *request)
9001 {
9002         struct sk_buff *msg;
9003         void *hdr;
9004
9005         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9006         if (!msg)
9007                 return;
9008
9009         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
9010         if (!hdr) {
9011                 nlmsg_free(msg);
9012                 return;
9013         }
9014
9015         /* Userspace can always count this one always being set */
9016         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
9017                 goto nla_put_failure;
9018
9019         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
9020                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9021                                NL80211_REGDOM_TYPE_WORLD))
9022                         goto nla_put_failure;
9023         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
9024                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9025                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
9026                         goto nla_put_failure;
9027         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
9028                    request->intersect) {
9029                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9030                                NL80211_REGDOM_TYPE_INTERSECTION))
9031                         goto nla_put_failure;
9032         } else {
9033                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
9034                                NL80211_REGDOM_TYPE_COUNTRY) ||
9035                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
9036                                    request->alpha2))
9037                         goto nla_put_failure;
9038         }
9039
9040         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
9041             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
9042                 goto nla_put_failure;
9043
9044         genlmsg_end(msg, hdr);
9045
9046         rcu_read_lock();
9047         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9048                                 GFP_ATOMIC);
9049         rcu_read_unlock();
9050
9051         return;
9052
9053 nla_put_failure:
9054         genlmsg_cancel(msg, hdr);
9055         nlmsg_free(msg);
9056 }
9057
9058 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
9059                                     struct net_device *netdev,
9060                                     const u8 *buf, size_t len,
9061                                     enum nl80211_commands cmd, gfp_t gfp)
9062 {
9063         struct sk_buff *msg;
9064         void *hdr;
9065
9066         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9067         if (!msg)
9068                 return;
9069
9070         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9071         if (!hdr) {
9072                 nlmsg_free(msg);
9073                 return;
9074         }
9075
9076         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9077             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9078             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9079                 goto nla_put_failure;
9080
9081         genlmsg_end(msg, hdr);
9082
9083         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9084                                 nl80211_mlme_mcgrp.id, gfp);
9085         return;
9086
9087  nla_put_failure:
9088         genlmsg_cancel(msg, hdr);
9089         nlmsg_free(msg);
9090 }
9091
9092 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
9093                           struct net_device *netdev, const u8 *buf,
9094                           size_t len, gfp_t gfp)
9095 {
9096         nl80211_send_mlme_event(rdev, netdev, buf, len,
9097                                 NL80211_CMD_AUTHENTICATE, gfp);
9098 }
9099
9100 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
9101                            struct net_device *netdev, const u8 *buf,
9102                            size_t len, gfp_t gfp)
9103 {
9104         nl80211_send_mlme_event(rdev, netdev, buf, len,
9105                                 NL80211_CMD_ASSOCIATE, gfp);
9106 }
9107
9108 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
9109                          struct net_device *netdev, const u8 *buf,
9110                          size_t len, gfp_t gfp)
9111 {
9112         nl80211_send_mlme_event(rdev, netdev, buf, len,
9113                                 NL80211_CMD_DEAUTHENTICATE, gfp);
9114 }
9115
9116 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
9117                            struct net_device *netdev, const u8 *buf,
9118                            size_t len, gfp_t gfp)
9119 {
9120         nl80211_send_mlme_event(rdev, netdev, buf, len,
9121                                 NL80211_CMD_DISASSOCIATE, gfp);
9122 }
9123
9124 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
9125                                 struct net_device *netdev, const u8 *buf,
9126                                 size_t len, gfp_t gfp)
9127 {
9128         nl80211_send_mlme_event(rdev, netdev, buf, len,
9129                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
9130 }
9131
9132 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
9133                                   struct net_device *netdev, const u8 *buf,
9134                                   size_t len, gfp_t gfp)
9135 {
9136         nl80211_send_mlme_event(rdev, netdev, buf, len,
9137                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
9138 }
9139
9140 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
9141                                       struct net_device *netdev, int cmd,
9142                                       const u8 *addr, gfp_t gfp)
9143 {
9144         struct sk_buff *msg;
9145         void *hdr;
9146
9147         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9148         if (!msg)
9149                 return;
9150
9151         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9152         if (!hdr) {
9153                 nlmsg_free(msg);
9154                 return;
9155         }
9156
9157         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9158             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9159             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
9160             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9161                 goto nla_put_failure;
9162
9163         genlmsg_end(msg, hdr);
9164
9165         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9166                                 nl80211_mlme_mcgrp.id, gfp);
9167         return;
9168
9169  nla_put_failure:
9170         genlmsg_cancel(msg, hdr);
9171         nlmsg_free(msg);
9172 }
9173
9174 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
9175                                struct net_device *netdev, const u8 *addr,
9176                                gfp_t gfp)
9177 {
9178         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
9179                                   addr, gfp);
9180 }
9181
9182 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
9183                                 struct net_device *netdev, const u8 *addr,
9184                                 gfp_t gfp)
9185 {
9186         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
9187                                   addr, gfp);
9188 }
9189
9190 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
9191                                  struct net_device *netdev, const u8 *bssid,
9192                                  const u8 *req_ie, size_t req_ie_len,
9193                                  const u8 *resp_ie, size_t resp_ie_len,
9194                                  u16 status, gfp_t gfp)
9195 {
9196         struct sk_buff *msg;
9197         void *hdr;
9198
9199         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9200         if (!msg)
9201                 return;
9202
9203         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
9204         if (!hdr) {
9205                 nlmsg_free(msg);
9206                 return;
9207         }
9208
9209         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9210             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9211             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
9212             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
9213             (req_ie &&
9214              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9215             (resp_ie &&
9216              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9217                 goto nla_put_failure;
9218
9219         genlmsg_end(msg, hdr);
9220
9221         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9222                                 nl80211_mlme_mcgrp.id, gfp);
9223         return;
9224
9225  nla_put_failure:
9226         genlmsg_cancel(msg, hdr);
9227         nlmsg_free(msg);
9228
9229 }
9230
9231 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
9232                          struct net_device *netdev, const u8 *bssid,
9233                          const u8 *req_ie, size_t req_ie_len,
9234                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
9235 {
9236         struct sk_buff *msg;
9237         void *hdr;
9238
9239         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9240         if (!msg)
9241                 return;
9242
9243         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
9244         if (!hdr) {
9245                 nlmsg_free(msg);
9246                 return;
9247         }
9248
9249         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9250             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9251             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
9252             (req_ie &&
9253              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
9254             (resp_ie &&
9255              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
9256                 goto nla_put_failure;
9257
9258         genlmsg_end(msg, hdr);
9259
9260         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9261                                 nl80211_mlme_mcgrp.id, gfp);
9262         return;
9263
9264  nla_put_failure:
9265         genlmsg_cancel(msg, hdr);
9266         nlmsg_free(msg);
9267
9268 }
9269
9270 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
9271                                struct net_device *netdev, u16 reason,
9272                                const u8 *ie, size_t ie_len, bool from_ap)
9273 {
9274         struct sk_buff *msg;
9275         void *hdr;
9276
9277         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
9278         if (!msg)
9279                 return;
9280
9281         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
9282         if (!hdr) {
9283                 nlmsg_free(msg);
9284                 return;
9285         }
9286
9287         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9288             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9289             (from_ap && reason &&
9290              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
9291             (from_ap &&
9292              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
9293             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
9294                 goto nla_put_failure;
9295
9296         genlmsg_end(msg, hdr);
9297
9298         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9299                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
9300         return;
9301
9302  nla_put_failure:
9303         genlmsg_cancel(msg, hdr);
9304         nlmsg_free(msg);
9305
9306 }
9307
9308 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
9309                              struct net_device *netdev, const u8 *bssid,
9310                              gfp_t gfp)
9311 {
9312         struct sk_buff *msg;
9313         void *hdr;
9314
9315         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9316         if (!msg)
9317                 return;
9318
9319         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
9320         if (!hdr) {
9321                 nlmsg_free(msg);
9322                 return;
9323         }
9324
9325         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9326             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9327             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9328                 goto nla_put_failure;
9329
9330         genlmsg_end(msg, hdr);
9331
9332         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9333                                 nl80211_mlme_mcgrp.id, gfp);
9334         return;
9335
9336  nla_put_failure:
9337         genlmsg_cancel(msg, hdr);
9338         nlmsg_free(msg);
9339 }
9340
9341 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
9342                 struct net_device *netdev,
9343                 const u8 *macaddr, const u8* ie, u8 ie_len,
9344                 gfp_t gfp)
9345 {
9346         struct sk_buff *msg;
9347         void *hdr;
9348
9349         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9350         if (!msg)
9351                 return;
9352
9353         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9354         if (!hdr) {
9355                 nlmsg_free(msg);
9356                 return;
9357         }
9358
9359         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9360             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9361             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
9362             (ie_len && ie &&
9363              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9364                 goto nla_put_failure;
9365
9366         genlmsg_end(msg, hdr);
9367
9368         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9369                                 nl80211_mlme_mcgrp.id, gfp);
9370         return;
9371
9372  nla_put_failure:
9373         genlmsg_cancel(msg, hdr);
9374         nlmsg_free(msg);
9375 }
9376
9377 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9378                                  struct net_device *netdev, const u8 *addr,
9379                                  enum nl80211_key_type key_type, int key_id,
9380                                  const u8 *tsc, gfp_t gfp)
9381 {
9382         struct sk_buff *msg;
9383         void *hdr;
9384
9385         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9386         if (!msg)
9387                 return;
9388
9389         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9390         if (!hdr) {
9391                 nlmsg_free(msg);
9392                 return;
9393         }
9394
9395         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9396             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9397             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9398             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9399             (key_id != -1 &&
9400              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9401             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9402                 goto nla_put_failure;
9403
9404         genlmsg_end(msg, hdr);
9405
9406         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9407                                 nl80211_mlme_mcgrp.id, gfp);
9408         return;
9409
9410  nla_put_failure:
9411         genlmsg_cancel(msg, hdr);
9412         nlmsg_free(msg);
9413 }
9414
9415 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9416                                     struct ieee80211_channel *channel_before,
9417                                     struct ieee80211_channel *channel_after)
9418 {
9419         struct sk_buff *msg;
9420         void *hdr;
9421         struct nlattr *nl_freq;
9422
9423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9424         if (!msg)
9425                 return;
9426
9427         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9428         if (!hdr) {
9429                 nlmsg_free(msg);
9430                 return;
9431         }
9432
9433         /*
9434          * Since we are applying the beacon hint to a wiphy we know its
9435          * wiphy_idx is valid
9436          */
9437         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9438                 goto nla_put_failure;
9439
9440         /* Before */
9441         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9442         if (!nl_freq)
9443                 goto nla_put_failure;
9444         if (nl80211_msg_put_channel(msg, channel_before, false))
9445                 goto nla_put_failure;
9446         nla_nest_end(msg, nl_freq);
9447
9448         /* After */
9449         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9450         if (!nl_freq)
9451                 goto nla_put_failure;
9452         if (nl80211_msg_put_channel(msg, channel_after, false))
9453                 goto nla_put_failure;
9454         nla_nest_end(msg, nl_freq);
9455
9456         genlmsg_end(msg, hdr);
9457
9458         rcu_read_lock();
9459         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9460                                 GFP_ATOMIC);
9461         rcu_read_unlock();
9462
9463         return;
9464
9465 nla_put_failure:
9466         genlmsg_cancel(msg, hdr);
9467         nlmsg_free(msg);
9468 }
9469
9470 static void nl80211_send_remain_on_chan_event(
9471         int cmd, struct cfg80211_registered_device *rdev,
9472         struct wireless_dev *wdev, u64 cookie,
9473         struct ieee80211_channel *chan,
9474         unsigned int duration, gfp_t gfp)
9475 {
9476         struct sk_buff *msg;
9477         void *hdr;
9478
9479         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9480         if (!msg)
9481                 return;
9482
9483         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9484         if (!hdr) {
9485                 nlmsg_free(msg);
9486                 return;
9487         }
9488
9489         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9490             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9491                                          wdev->netdev->ifindex)) ||
9492             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9493             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9494             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9495                         NL80211_CHAN_NO_HT) ||
9496             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9497                 goto nla_put_failure;
9498
9499         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9500             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9501                 goto nla_put_failure;
9502
9503         genlmsg_end(msg, hdr);
9504
9505         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9506                                 nl80211_mlme_mcgrp.id, gfp);
9507         return;
9508
9509  nla_put_failure:
9510         genlmsg_cancel(msg, hdr);
9511         nlmsg_free(msg);
9512 }
9513
9514 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
9515                                     struct wireless_dev *wdev, u64 cookie,
9516                                     struct ieee80211_channel *chan,
9517                                     unsigned int duration, gfp_t gfp)
9518 {
9519         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9520                                           rdev, wdev, cookie, chan,
9521                                           duration, gfp);
9522 }
9523
9524 void nl80211_send_remain_on_channel_cancel(
9525         struct cfg80211_registered_device *rdev,
9526         struct wireless_dev *wdev,
9527         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
9528 {
9529         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9530                                           rdev, wdev, cookie, chan, 0, gfp);
9531 }
9532
9533 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
9534                             struct net_device *dev, const u8 *mac_addr,
9535                             struct station_info *sinfo, gfp_t gfp)
9536 {
9537         struct sk_buff *msg;
9538
9539         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9540         if (!msg)
9541                 return;
9542
9543         if (nl80211_send_station(msg, 0, 0, 0,
9544                                  rdev, dev, mac_addr, sinfo) < 0) {
9545                 nlmsg_free(msg);
9546                 return;
9547         }
9548
9549         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9550                                 nl80211_mlme_mcgrp.id, gfp);
9551 }
9552
9553 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
9554                                 struct net_device *dev, const u8 *mac_addr,
9555                                 gfp_t gfp)
9556 {
9557         struct sk_buff *msg;
9558         void *hdr;
9559
9560         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9561         if (!msg)
9562                 return;
9563
9564         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9565         if (!hdr) {
9566                 nlmsg_free(msg);
9567                 return;
9568         }
9569
9570         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9571             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9572                 goto nla_put_failure;
9573
9574         genlmsg_end(msg, hdr);
9575
9576         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9577                                 nl80211_mlme_mcgrp.id, gfp);
9578         return;
9579
9580  nla_put_failure:
9581         genlmsg_cancel(msg, hdr);
9582         nlmsg_free(msg);
9583 }
9584
9585 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
9586                                     struct net_device *dev, const u8 *mac_addr,
9587                                     enum nl80211_connect_failed_reason reason,
9588                                     gfp_t gfp)
9589 {
9590         struct sk_buff *msg;
9591         void *hdr;
9592
9593         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9594         if (!msg)
9595                 return;
9596
9597         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9598         if (!hdr) {
9599                 nlmsg_free(msg);
9600                 return;
9601         }
9602
9603         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9604             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9605             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9606                 goto nla_put_failure;
9607
9608         genlmsg_end(msg, hdr);
9609
9610         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9611                                 nl80211_mlme_mcgrp.id, gfp);
9612         return;
9613
9614  nla_put_failure:
9615         genlmsg_cancel(msg, hdr);
9616         nlmsg_free(msg);
9617 }
9618
9619 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9620                                        const u8 *addr, gfp_t gfp)
9621 {
9622         struct wireless_dev *wdev = dev->ieee80211_ptr;
9623         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9624         struct sk_buff *msg;
9625         void *hdr;
9626         int err;
9627         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9628
9629         if (!nlportid)
9630                 return false;
9631
9632         msg = nlmsg_new(100, gfp);
9633         if (!msg)
9634                 return true;
9635
9636         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9637         if (!hdr) {
9638                 nlmsg_free(msg);
9639                 return true;
9640         }
9641
9642         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9643             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9644             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9645                 goto nla_put_failure;
9646
9647         err = genlmsg_end(msg, hdr);
9648         if (err < 0) {
9649                 nlmsg_free(msg);
9650                 return true;
9651         }
9652
9653         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9654         return true;
9655
9656  nla_put_failure:
9657         genlmsg_cancel(msg, hdr);
9658         nlmsg_free(msg);
9659         return true;
9660 }
9661
9662 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
9663 {
9664         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9665                                           addr, gfp);
9666 }
9667
9668 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
9669                                     const u8 *addr, gfp_t gfp)
9670 {
9671         return __nl80211_unexpected_frame(dev,
9672                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9673                                           addr, gfp);
9674 }
9675
9676 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9677                       struct wireless_dev *wdev, u32 nlportid,
9678                       int freq, int sig_dbm,
9679                       const u8 *buf, size_t len, gfp_t gfp)
9680 {
9681         struct net_device *netdev = wdev->netdev;
9682         struct sk_buff *msg;
9683         void *hdr;
9684
9685         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9686         if (!msg)
9687                 return -ENOMEM;
9688
9689         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9690         if (!hdr) {
9691                 nlmsg_free(msg);
9692                 return -ENOMEM;
9693         }
9694
9695         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9696             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9697                                         netdev->ifindex)) ||
9698             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9699             (sig_dbm &&
9700              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9701             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9702                 goto nla_put_failure;
9703
9704         genlmsg_end(msg, hdr);
9705
9706         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9707
9708  nla_put_failure:
9709         genlmsg_cancel(msg, hdr);
9710         nlmsg_free(msg);
9711         return -ENOBUFS;
9712 }
9713
9714 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
9715                                  struct wireless_dev *wdev, u64 cookie,
9716                                  const u8 *buf, size_t len, bool ack,
9717                                  gfp_t gfp)
9718 {
9719         struct net_device *netdev = wdev->netdev;
9720         struct sk_buff *msg;
9721         void *hdr;
9722
9723         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9724         if (!msg)
9725                 return;
9726
9727         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9728         if (!hdr) {
9729                 nlmsg_free(msg);
9730                 return;
9731         }
9732
9733         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9734             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9735                                    netdev->ifindex)) ||
9736             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9737             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9738             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9739                 goto nla_put_failure;
9740
9741         genlmsg_end(msg, hdr);
9742
9743         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9744         return;
9745
9746  nla_put_failure:
9747         genlmsg_cancel(msg, hdr);
9748         nlmsg_free(msg);
9749 }
9750
9751 void
9752 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
9753                              struct net_device *netdev,
9754                              enum nl80211_cqm_rssi_threshold_event rssi_event,
9755                              gfp_t gfp)
9756 {
9757         struct sk_buff *msg;
9758         struct nlattr *pinfoattr;
9759         void *hdr;
9760
9761         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9762         if (!msg)
9763                 return;
9764
9765         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9766         if (!hdr) {
9767                 nlmsg_free(msg);
9768                 return;
9769         }
9770
9771         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9772             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9773                 goto nla_put_failure;
9774
9775         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9776         if (!pinfoattr)
9777                 goto nla_put_failure;
9778
9779         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9780                         rssi_event))
9781                 goto nla_put_failure;
9782
9783         nla_nest_end(msg, pinfoattr);
9784
9785         genlmsg_end(msg, hdr);
9786
9787         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9788                                 nl80211_mlme_mcgrp.id, gfp);
9789         return;
9790
9791  nla_put_failure:
9792         genlmsg_cancel(msg, hdr);
9793         nlmsg_free(msg);
9794 }
9795
9796 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9797                               struct net_device *netdev, const u8 *bssid,
9798                               const u8 *replay_ctr, gfp_t gfp)
9799 {
9800         struct sk_buff *msg;
9801         struct nlattr *rekey_attr;
9802         void *hdr;
9803
9804         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9805         if (!msg)
9806                 return;
9807
9808         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
9809         if (!hdr) {
9810                 nlmsg_free(msg);
9811                 return;
9812         }
9813
9814         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9815             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9816             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9817                 goto nla_put_failure;
9818
9819         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
9820         if (!rekey_attr)
9821                 goto nla_put_failure;
9822
9823         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
9824                     NL80211_REPLAY_CTR_LEN, replay_ctr))
9825                 goto nla_put_failure;
9826
9827         nla_nest_end(msg, rekey_attr);
9828
9829         genlmsg_end(msg, hdr);
9830
9831         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9832                                 nl80211_mlme_mcgrp.id, gfp);
9833         return;
9834
9835  nla_put_failure:
9836         genlmsg_cancel(msg, hdr);
9837         nlmsg_free(msg);
9838 }
9839
9840 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
9841                                     struct net_device *netdev, int index,
9842                                     const u8 *bssid, bool preauth, gfp_t gfp)
9843 {
9844         struct sk_buff *msg;
9845         struct nlattr *attr;
9846         void *hdr;
9847
9848         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9849         if (!msg)
9850                 return;
9851
9852         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
9853         if (!hdr) {
9854                 nlmsg_free(msg);
9855                 return;
9856         }
9857
9858         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9859             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9860                 goto nla_put_failure;
9861
9862         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
9863         if (!attr)
9864                 goto nla_put_failure;
9865
9866         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
9867             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
9868             (preauth &&
9869              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
9870                 goto nla_put_failure;
9871
9872         nla_nest_end(msg, attr);
9873
9874         genlmsg_end(msg, hdr);
9875
9876         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9877                                 nl80211_mlme_mcgrp.id, gfp);
9878         return;
9879
9880  nla_put_failure:
9881         genlmsg_cancel(msg, hdr);
9882         nlmsg_free(msg);
9883 }
9884
9885 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
9886                               struct net_device *netdev,
9887                               struct cfg80211_chan_def *chandef, gfp_t gfp)
9888 {
9889         struct sk_buff *msg;
9890         void *hdr;
9891
9892         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9893         if (!msg)
9894                 return;
9895
9896         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
9897         if (!hdr) {
9898                 nlmsg_free(msg);
9899                 return;
9900         }
9901
9902         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9903                 goto nla_put_failure;
9904
9905         if (nl80211_send_chandef(msg, chandef))
9906                 goto nla_put_failure;
9907
9908         genlmsg_end(msg, hdr);
9909
9910         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9911                                 nl80211_mlme_mcgrp.id, gfp);
9912         return;
9913
9914  nla_put_failure:
9915         genlmsg_cancel(msg, hdr);
9916         nlmsg_free(msg);
9917 }
9918
9919 void
9920 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
9921                             struct net_device *netdev, const u8 *peer,
9922                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
9923 {
9924         struct sk_buff *msg;
9925         struct nlattr *pinfoattr;
9926         void *hdr;
9927
9928         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9929         if (!msg)
9930                 return;
9931
9932         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9933         if (!hdr) {
9934                 nlmsg_free(msg);
9935                 return;
9936         }
9937
9938         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9939             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9940             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9941                 goto nla_put_failure;
9942
9943         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9944         if (!pinfoattr)
9945                 goto nla_put_failure;
9946
9947         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
9948                 goto nla_put_failure;
9949
9950         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
9951                 goto nla_put_failure;
9952
9953         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
9954                 goto nla_put_failure;
9955
9956         nla_nest_end(msg, pinfoattr);
9957
9958         genlmsg_end(msg, hdr);
9959
9960         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9961                                 nl80211_mlme_mcgrp.id, gfp);
9962         return;
9963
9964  nla_put_failure:
9965         genlmsg_cancel(msg, hdr);
9966         nlmsg_free(msg);
9967 }
9968
9969 void
9970 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
9971                      struct cfg80211_chan_def *chandef,
9972                      enum nl80211_radar_event event,
9973                      struct net_device *netdev, gfp_t gfp)
9974 {
9975         struct sk_buff *msg;
9976         void *hdr;
9977
9978         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9979         if (!msg)
9980                 return;
9981
9982         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
9983         if (!hdr) {
9984                 nlmsg_free(msg);
9985                 return;
9986         }
9987
9988         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
9989                 goto nla_put_failure;
9990
9991         /* NOP and radar events don't need a netdev parameter */
9992         if (netdev) {
9993                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
9994
9995                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9996                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9997                         goto nla_put_failure;
9998         }
9999
10000         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
10001                 goto nla_put_failure;
10002
10003         if (nl80211_send_chandef(msg, chandef))
10004                 goto nla_put_failure;
10005
10006         if (genlmsg_end(msg, hdr) < 0) {
10007                 nlmsg_free(msg);
10008                 return;
10009         }
10010
10011         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10012                                 nl80211_mlme_mcgrp.id, gfp);
10013         return;
10014
10015  nla_put_failure:
10016         genlmsg_cancel(msg, hdr);
10017         nlmsg_free(msg);
10018 }
10019
10020 void
10021 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
10022                                 struct net_device *netdev, const u8 *peer,
10023                                 u32 num_packets, gfp_t gfp)
10024 {
10025         struct sk_buff *msg;
10026         struct nlattr *pinfoattr;
10027         void *hdr;
10028
10029         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10030         if (!msg)
10031                 return;
10032
10033         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
10034         if (!hdr) {
10035                 nlmsg_free(msg);
10036                 return;
10037         }
10038
10039         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10040             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
10041             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
10042                 goto nla_put_failure;
10043
10044         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
10045         if (!pinfoattr)
10046                 goto nla_put_failure;
10047
10048         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
10049                 goto nla_put_failure;
10050
10051         nla_nest_end(msg, pinfoattr);
10052
10053         genlmsg_end(msg, hdr);
10054
10055         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10056                                 nl80211_mlme_mcgrp.id, gfp);
10057         return;
10058
10059  nla_put_failure:
10060         genlmsg_cancel(msg, hdr);
10061         nlmsg_free(msg);
10062 }
10063
10064 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
10065                            u64 cookie, bool acked, gfp_t gfp)
10066 {
10067         struct wireless_dev *wdev = dev->ieee80211_ptr;
10068         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10069         struct sk_buff *msg;
10070         void *hdr;
10071         int err;
10072
10073         trace_cfg80211_probe_status(dev, addr, cookie, acked);
10074
10075         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10076
10077         if (!msg)
10078                 return;
10079
10080         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
10081         if (!hdr) {
10082                 nlmsg_free(msg);
10083                 return;
10084         }
10085
10086         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10087             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10088             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
10089             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
10090             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
10091                 goto nla_put_failure;
10092
10093         err = genlmsg_end(msg, hdr);
10094         if (err < 0) {
10095                 nlmsg_free(msg);
10096                 return;
10097         }
10098
10099         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10100                                 nl80211_mlme_mcgrp.id, gfp);
10101         return;
10102
10103  nla_put_failure:
10104         genlmsg_cancel(msg, hdr);
10105         nlmsg_free(msg);
10106 }
10107 EXPORT_SYMBOL(cfg80211_probe_status);
10108
10109 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
10110                                  const u8 *frame, size_t len,
10111                                  int freq, int sig_dbm)
10112 {
10113         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
10114         struct sk_buff *msg;
10115         void *hdr;
10116         struct cfg80211_beacon_registration *reg;
10117
10118         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
10119
10120         spin_lock_bh(&rdev->beacon_registrations_lock);
10121         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
10122                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
10123                 if (!msg) {
10124                         spin_unlock_bh(&rdev->beacon_registrations_lock);
10125                         return;
10126                 }
10127
10128                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
10129                 if (!hdr)
10130                         goto nla_put_failure;
10131
10132                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10133                     (freq &&
10134                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
10135                     (sig_dbm &&
10136                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
10137                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
10138                         goto nla_put_failure;
10139
10140                 genlmsg_end(msg, hdr);
10141
10142                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
10143         }
10144         spin_unlock_bh(&rdev->beacon_registrations_lock);
10145         return;
10146
10147  nla_put_failure:
10148         spin_unlock_bh(&rdev->beacon_registrations_lock);
10149         if (hdr)
10150                 genlmsg_cancel(msg, hdr);
10151         nlmsg_free(msg);
10152 }
10153 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
10154
10155 #ifdef CONFIG_PM
10156 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
10157                                    struct cfg80211_wowlan_wakeup *wakeup,
10158                                    gfp_t gfp)
10159 {
10160         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10161         struct sk_buff *msg;
10162         void *hdr;
10163         int err, size = 200;
10164
10165         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
10166
10167         if (wakeup)
10168                 size += wakeup->packet_present_len;
10169
10170         msg = nlmsg_new(size, gfp);
10171         if (!msg)
10172                 return;
10173
10174         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
10175         if (!hdr)
10176                 goto free_msg;
10177
10178         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10179             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
10180                 goto free_msg;
10181
10182         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
10183                                         wdev->netdev->ifindex))
10184                 goto free_msg;
10185
10186         if (wakeup) {
10187                 struct nlattr *reasons;
10188
10189                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
10190
10191                 if (wakeup->disconnect &&
10192                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
10193                         goto free_msg;
10194                 if (wakeup->magic_pkt &&
10195                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
10196                         goto free_msg;
10197                 if (wakeup->gtk_rekey_failure &&
10198                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
10199                         goto free_msg;
10200                 if (wakeup->eap_identity_req &&
10201                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
10202                         goto free_msg;
10203                 if (wakeup->four_way_handshake &&
10204                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
10205                         goto free_msg;
10206                 if (wakeup->rfkill_release &&
10207                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
10208                         goto free_msg;
10209
10210                 if (wakeup->pattern_idx >= 0 &&
10211                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
10212                                 wakeup->pattern_idx))
10213                         goto free_msg;
10214
10215                 if (wakeup->tcp_match)
10216                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
10217
10218                 if (wakeup->tcp_connlost)
10219                         nla_put_flag(msg,
10220                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
10221
10222                 if (wakeup->tcp_nomoretokens)
10223                         nla_put_flag(msg,
10224                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
10225
10226                 if (wakeup->packet) {
10227                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
10228                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
10229
10230                         if (!wakeup->packet_80211) {
10231                                 pkt_attr =
10232                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
10233                                 len_attr =
10234                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
10235                         }
10236
10237                         if (wakeup->packet_len &&
10238                             nla_put_u32(msg, len_attr, wakeup->packet_len))
10239                                 goto free_msg;
10240
10241                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
10242                                     wakeup->packet))
10243                                 goto free_msg;
10244                 }
10245
10246                 nla_nest_end(msg, reasons);
10247         }
10248
10249         err = genlmsg_end(msg, hdr);
10250         if (err < 0)
10251                 goto free_msg;
10252
10253         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10254                                 nl80211_mlme_mcgrp.id, gfp);
10255         return;
10256
10257  free_msg:
10258         nlmsg_free(msg);
10259 }
10260 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
10261 #endif
10262
10263 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
10264                                 enum nl80211_tdls_operation oper,
10265                                 u16 reason_code, gfp_t gfp)
10266 {
10267         struct wireless_dev *wdev = dev->ieee80211_ptr;
10268         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
10269         struct sk_buff *msg;
10270         void *hdr;
10271         int err;
10272
10273         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
10274                                          reason_code);
10275
10276         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
10277         if (!msg)
10278                 return;
10279
10280         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
10281         if (!hdr) {
10282                 nlmsg_free(msg);
10283                 return;
10284         }
10285
10286         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
10287             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
10288             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
10289             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
10290             (reason_code > 0 &&
10291              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
10292                 goto nla_put_failure;
10293
10294         err = genlmsg_end(msg, hdr);
10295         if (err < 0) {
10296                 nlmsg_free(msg);
10297                 return;
10298         }
10299
10300         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
10301                                 nl80211_mlme_mcgrp.id, gfp);
10302         return;
10303
10304  nla_put_failure:
10305         genlmsg_cancel(msg, hdr);
10306         nlmsg_free(msg);
10307 }
10308 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
10309
10310 static int nl80211_netlink_notify(struct notifier_block * nb,
10311                                   unsigned long state,
10312                                   void *_notify)
10313 {
10314         struct netlink_notify *notify = _notify;
10315         struct cfg80211_registered_device *rdev;
10316         struct wireless_dev *wdev;
10317         struct cfg80211_beacon_registration *reg, *tmp;
10318
10319         if (state != NETLINK_URELEASE)
10320                 return NOTIFY_DONE;
10321
10322         rcu_read_lock();
10323
10324         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10325                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10326                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10327
10328                 spin_lock_bh(&rdev->beacon_registrations_lock);
10329                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10330                                          list) {
10331                         if (reg->nlportid == notify->portid) {
10332                                 list_del(&reg->list);
10333                                 kfree(reg);
10334                                 break;
10335                         }
10336                 }
10337                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10338         }
10339
10340         rcu_read_unlock();
10341
10342         return NOTIFY_DONE;
10343 }
10344
10345 static struct notifier_block nl80211_netlink_notifier = {
10346         .notifier_call = nl80211_netlink_notify,
10347 };
10348
10349 /* initialisation/exit functions */
10350
10351 int nl80211_init(void)
10352 {
10353         int err;
10354
10355         err = genl_register_family_with_ops(&nl80211_fam,
10356                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10357         if (err)
10358                 return err;
10359
10360         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10361         if (err)
10362                 goto err_out;
10363
10364         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10365         if (err)
10366                 goto err_out;
10367
10368         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10369         if (err)
10370                 goto err_out;
10371
10372         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10373         if (err)
10374                 goto err_out;
10375
10376 #ifdef CONFIG_NL80211_TESTMODE
10377         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10378         if (err)
10379                 goto err_out;
10380 #endif
10381
10382         err = netlink_register_notifier(&nl80211_netlink_notifier);
10383         if (err)
10384                 goto err_out;
10385
10386         return 0;
10387  err_out:
10388         genl_unregister_family(&nl80211_fam);
10389         return err;
10390 }
10391
10392 void nl80211_exit(void)
10393 {
10394         netlink_unregister_notifier(&nl80211_netlink_notifier);
10395         genl_unregister_family(&nl80211_fam);
10396 }