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 };
 374
 375 /* policy for the key attributes */
 376 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 377         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 378         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 379         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 380         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 381         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 382         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 383         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 384         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 385 };
 386
 387 /* policy for the key default flags */
 388 static const struct nla_policy
 389 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 390         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 391         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 392 };
 393
 394 /* policy for WoWLAN attributes */
 395 static const struct nla_policy
 396 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 397         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 398         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 400         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 401         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 402         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 403         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 404         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 405         [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
 406 };
 407
 408 static const struct nla_policy
 409 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
 410         [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
 411         [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
 412         [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN },
 413         [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
 414         [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
 415         [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 },
 416         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
 417                 .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
 418         },
 419         [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
 420                 .len = sizeof(struct nl80211_wowlan_tcp_data_token)
 421         },
 422         [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
 423         [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 },
 424         [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 },
 425 };
 426
 427 /* policy for GTK rekey offload attributes */
 428 static const struct nla_policy
 429 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 430         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 431         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 432         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 433 };
 434
 435 static const struct nla_policy
 436 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 437         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 438                                                  .len = IEEE80211_MAX_SSID_LEN },
 439         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 440 };
 441
 442 /* ifidx get helper */
 443 static int nl80211_get_ifidx(struct netlink_callback *cb)
 444 {
 445         int res;
 446
 447         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 448                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 449                           nl80211_policy);
 450         if (res)
 451                 return res;
 452
 453         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 454                 return -EINVAL;
 455
 456         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 457         if (!res)
 458                 return -EINVAL;
 459         return res;
 460 }
 461
 462 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 463                                        struct netlink_callback *cb,
 464                                        struct cfg80211_registered_device **rdev,
 465                                        struct net_device **dev)
 466 {
 467         int ifidx = cb->args[0];
 468         int err;
 469
 470         if (!ifidx)
 471                 ifidx = nl80211_get_ifidx(cb);
 472         if (ifidx < 0)
 473                 return ifidx;
 474
 475         cb->args[0] = ifidx;
 476
 477         rtnl_lock();
 478
 479         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 480         if (!*dev) {
 481                 err = -ENODEV;
 482                 goto out_rtnl;
 483         }
 484
 485         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 486         if (IS_ERR(*rdev)) {
 487                 err = PTR_ERR(*rdev);
 488                 goto out_rtnl;
 489         }
 490
 491         return 0;
 492  out_rtnl:
 493         rtnl_unlock();
 494         return err;
 495 }
 496
 497 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 498 {
 499         cfg80211_unlock_rdev(rdev);
 500         rtnl_unlock();
 501 }
 502
 503 /* IE validation */
 504 static bool is_valid_ie_attr(const struct nlattr *attr)
 505 {
 506         const u8 *pos;
 507         int len;
 508
 509         if (!attr)
 510                 return true;
 511
 512         pos = nla_data(attr);
 513         len = nla_len(attr);
 514
 515         while (len) {
 516                 u8 elemlen;
 517
 518                 if (len < 2)
 519                         return false;
 520                 len -= 2;
 521
 522                 elemlen = pos[1];
 523                 if (elemlen > len)
 524                         return false;
 525
 526                 len -= elemlen;
 527                 pos += 2 + elemlen;
 528         }
 529
 530         return true;
 531 }
 532
 533 /* message building helper */
 534 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 535                                    int flags, u8 cmd)
 536 {
 537         /* since there is no private header just add the generic one */
 538         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 539 }
 540
 541 static int nl80211_msg_put_channel(struct sk_buff *msg,
 542                                    struct ieee80211_channel *chan)
 543 {
 544         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 545                         chan->center_freq))
 546                 goto nla_put_failure;
 547
 548         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 549             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 550                 goto nla_put_failure;
 551         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 552             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 553                 goto nla_put_failure;
 554         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 555             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 556                 goto nla_put_failure;
 557         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 558             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 559                 goto nla_put_failure;
 560
 561         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 562                         DBM_TO_MBM(chan->max_power)))
 563                 goto nla_put_failure;
 564
 565         return 0;
 566
 567  nla_put_failure:
 568         return -ENOBUFS;
 569 }
 570
 571 /* netlink command implementations */
 572
 573 struct key_parse {
 574         struct key_params p;
 575         int idx;
 576         int type;
 577         bool def, defmgmt;
 578         bool def_uni, def_multi;
 579 };
 580
 581 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 582 {
 583         struct nlattr *tb[NL80211_KEY_MAX + 1];
 584         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 585                                    nl80211_key_policy);
 586         if (err)
 587                 return err;
 588
 589         k->def = !!tb[NL80211_KEY_DEFAULT];
 590         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 591
 592         if (k->def) {
 593                 k->def_uni = true;
 594                 k->def_multi = true;
 595         }
 596         if (k->defmgmt)
 597                 k->def_multi = true;
 598
 599         if (tb[NL80211_KEY_IDX])
 600                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 601
 602         if (tb[NL80211_KEY_DATA]) {
 603                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 604                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 605         }
 606
 607         if (tb[NL80211_KEY_SEQ]) {
 608                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 609                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 610         }
 611
 612         if (tb[NL80211_KEY_CIPHER])
 613                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 614
 615         if (tb[NL80211_KEY_TYPE]) {
 616                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 617                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 618                         return -EINVAL;
 619         }
 620
 621         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 622                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 623                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 624                                        tb[NL80211_KEY_DEFAULT_TYPES],
 625                                        nl80211_key_default_policy);
 626                 if (err)
 627                         return err;
 628
 629                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 630                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 631         }
 632
 633         return 0;
 634 }
 635
 636 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 637 {
 638         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 639                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 640                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 641         }
 642
 643         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 644                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 645                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 646         }
 647
 648         if (info->attrs[NL80211_ATTR_KEY_IDX])
 649                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 650
 651         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 652                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 653
 654         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 655         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 656
 657         if (k->def) {
 658                 k->def_uni = true;
 659                 k->def_multi = true;
 660         }
 661         if (k->defmgmt)
 662                 k->def_multi = true;
 663
 664         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 665                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 666                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 667                         return -EINVAL;
 668         }
 669
 670         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 671                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 672                 int err = nla_parse_nested(
 673                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 674                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 675                                 nl80211_key_default_policy);
 676                 if (err)
 677                         return err;
 678
 679                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 680                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 681         }
 682
 683         return 0;
 684 }
 685
 686 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 687 {
 688         int err;
 689
 690         memset(k, 0, sizeof(*k));
 691         k->idx = -1;
 692         k->type = -1;
 693
 694         if (info->attrs[NL80211_ATTR_KEY])
 695                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 696         else
 697                 err = nl80211_parse_key_old(info, k);
 698
 699         if (err)
 700                 return err;
 701
 702         if (k->def && k->defmgmt)
 703                 return -EINVAL;
 704
 705         if (k->defmgmt) {
 706                 if (k->def_uni || !k->def_multi)
 707                         return -EINVAL;
 708         }
 709
 710         if (k->idx != -1) {
 711                 if (k->defmgmt) {
 712                         if (k->idx < 4 || k->idx > 5)
 713                                 return -EINVAL;
 714                 } else if (k->def) {
 715                         if (k->idx < 0 || k->idx > 3)
 716                                 return -EINVAL;
 717                 } else {
 718                         if (k->idx < 0 || k->idx > 5)
 719                                 return -EINVAL;
 720                 }
 721         }
 722
 723         return 0;
 724 }
 725
 726 static struct cfg80211_cached_keys *
 727 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 728                        struct nlattr *keys, bool *no_ht)
 729 {
 730         struct key_parse parse;
 731         struct nlattr *key;
 732         struct cfg80211_cached_keys *result;
 733         int rem, err, def = 0;
 734
 735         result = kzalloc(sizeof(*result), GFP_KERNEL);
 736         if (!result)
 737                 return ERR_PTR(-ENOMEM);
 738
 739         result->def = -1;
 740         result->defmgmt = -1;
 741
 742         nla_for_each_nested(key, keys, rem) {
 743                 memset(&parse, 0, sizeof(parse));
 744                 parse.idx = -1;
 745
 746                 err = nl80211_parse_key_new(key, &parse);
 747                 if (err)
 748                         goto error;
 749                 err = -EINVAL;
 750                 if (!parse.p.key)
 751                         goto error;
 752                 if (parse.idx < 0 || parse.idx > 4)
 753                         goto error;
 754                 if (parse.def) {
 755                         if (def)
 756                                 goto error;
 757                         def = 1;
 758                         result->def = parse.idx;
 759                         if (!parse.def_uni || !parse.def_multi)
 760                                 goto error;
 761                 } else if (parse.defmgmt)
 762                         goto error;
 763                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 764                                                      parse.idx, false, NULL);
 765                 if (err)
 766                         goto error;
 767                 result->params[parse.idx].cipher = parse.p.cipher;
 768                 result->params[parse.idx].key_len = parse.p.key_len;
 769                 result->params[parse.idx].key = result->data[parse.idx];
 770                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 771
 772                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 773                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 774                         if (no_ht)
 775                                 *no_ht = true;
 776                 }
 777         }
 778
 779         return result;
 780  error:
 781         kfree(result);
 782         return ERR_PTR(err);
 783 }
 784
 785 static int nl80211_key_allowed(struct wireless_dev *wdev)
 786 {
 787         ASSERT_WDEV_LOCK(wdev);
 788
 789         switch (wdev->iftype) {
 790         case NL80211_IFTYPE_AP:
 791         case NL80211_IFTYPE_AP_VLAN:
 792         case NL80211_IFTYPE_P2P_GO:
 793         case NL80211_IFTYPE_MESH_POINT:
 794                 break;
 795         case NL80211_IFTYPE_ADHOC:
 796                 if (!wdev->current_bss)
 797                         return -ENOLINK;
 798                 break;
 799         case NL80211_IFTYPE_STATION:
 800         case NL80211_IFTYPE_P2P_CLIENT:
 801                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 802                         return -ENOLINK;
 803                 break;
 804         default:
 805                 return -EINVAL;
 806         }
 807
 808         return 0;
 809 }
 810
 811 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 812 {
 813         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 814         int i;
 815
 816         if (!nl_modes)
 817                 goto nla_put_failure;
 818
 819         i = 0;
 820         while (ifmodes) {
 821                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 822                         goto nla_put_failure;
 823                 ifmodes >>= 1;
 824                 i++;
 825         }
 826
 827         nla_nest_end(msg, nl_modes);
 828         return 0;
 829
 830 nla_put_failure:
 831         return -ENOBUFS;
 832 }
 833
 834 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 835                                           struct sk_buff *msg)
 836 {
 837         struct nlattr *nl_combis;
 838         int i, j;
 839
 840         nl_combis = nla_nest_start(msg,
 841                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 842         if (!nl_combis)
 843                 goto nla_put_failure;
 844
 845         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 846                 const struct ieee80211_iface_combination *c;
 847                 struct nlattr *nl_combi, *nl_limits;
 848
 849                 c = &wiphy->iface_combinations[i];
 850
 851                 nl_combi = nla_nest_start(msg, i + 1);
 852                 if (!nl_combi)
 853                         goto nla_put_failure;
 854
 855                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 856                 if (!nl_limits)
 857                         goto nla_put_failure;
 858
 859                 for (j = 0; j < c->n_limits; j++) {
 860                         struct nlattr *nl_limit;
 861
 862                         nl_limit = nla_nest_start(msg, j + 1);
 863                         if (!nl_limit)
 864                                 goto nla_put_failure;
 865                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 866                                         c->limits[j].max))
 867                                 goto nla_put_failure;
 868                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 869                                                 c->limits[j].types))
 870                                 goto nla_put_failure;
 871                         nla_nest_end(msg, nl_limit);
 872                 }
 873
 874                 nla_nest_end(msg, nl_limits);
 875
 876                 if (c->beacon_int_infra_match &&
 877                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 878                         goto nla_put_failure;
 879                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 880                                 c->num_different_channels) ||
 881                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 882                                 c->max_interfaces))
 883                         goto nla_put_failure;
 884
 885                 nla_nest_end(msg, nl_combi);
 886         }
 887
 888         nla_nest_end(msg, nl_combis);
 889
 890         return 0;
 891 nla_put_failure:
 892         return -ENOBUFS;
 893 }
 894
 895 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 896                               struct cfg80211_registered_device *dev)
 897 {
 898         void *hdr;
 899         struct nlattr *nl_bands, *nl_band;
 900         struct nlattr *nl_freqs, *nl_freq;
 901         struct nlattr *nl_rates, *nl_rate;
 902         struct nlattr *nl_cmds;
 903         enum ieee80211_band band;
 904         struct ieee80211_channel *chan;
 905         struct ieee80211_rate *rate;
 906         int i;
 907         const struct ieee80211_txrx_stypes *mgmt_stypes =
 908                                 dev->wiphy.mgmt_stypes;
 909
 910         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 911         if (!hdr)
 912                 return -1;
 913
 914         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 915             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 916             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 917                         cfg80211_rdev_list_generation) ||
 918             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 919                        dev->wiphy.retry_short) ||
 920             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 921                        dev->wiphy.retry_long) ||
 922             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 923                         dev->wiphy.frag_threshold) ||
 924             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 925                         dev->wiphy.rts_threshold) ||
 926             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 927                        dev->wiphy.coverage_class) ||
 928             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 929                        dev->wiphy.max_scan_ssids) ||
 930             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 931                        dev->wiphy.max_sched_scan_ssids) ||
 932             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 933                         dev->wiphy.max_scan_ie_len) ||
 934             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 935                         dev->wiphy.max_sched_scan_ie_len) ||
 936             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 937                        dev->wiphy.max_match_sets))
 938                 goto nla_put_failure;
 939
 940         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 941             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 942                 goto nla_put_failure;
 943         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 944             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 945                 goto nla_put_failure;
 946         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 947             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 948                 goto nla_put_failure;
 949         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 950             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 951                 goto nla_put_failure;
 952         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 953             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 954                 goto nla_put_failure;
 955         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 956             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 957                 goto nla_put_failure;
 958
 959         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 960                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 961                     dev->wiphy.cipher_suites))
 962                 goto nla_put_failure;
 963
 964         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 965                        dev->wiphy.max_num_pmkids))
 966                 goto nla_put_failure;
 967
 968         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 969             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 970                 goto nla_put_failure;
 971
 972         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 973                         dev->wiphy.available_antennas_tx) ||
 974             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 975                         dev->wiphy.available_antennas_rx))
 976                 goto nla_put_failure;
 977
 978         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 979             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 980                         dev->wiphy.probe_resp_offload))
 981                 goto nla_put_failure;
 982
 983         if ((dev->wiphy.available_antennas_tx ||
 984              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 985                 u32 tx_ant = 0, rx_ant = 0;
 986                 int res;
 987                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 988                 if (!res) {
 989                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 990                                         tx_ant) ||
 991                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 992                                         rx_ant))
 993                                 goto nla_put_failure;
 994                 }
 995         }
 996
 997         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 998                                 dev->wiphy.interface_modes))
 999                 goto nla_put_failure;
1000
1001         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
1002         if (!nl_bands)
1003                 goto nla_put_failure;
1004
1005         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
1006                 if (!dev->wiphy.bands[band])
1007                         continue;
1008
1009                 nl_band = nla_nest_start(msg, band);
1010                 if (!nl_band)
1011                         goto nla_put_failure;
1012
1013                 /* add HT info */
1014                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
1015                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
1016                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
1017                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
1018                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
1019                                  dev->wiphy.bands[band]->ht_cap.cap) ||
1020                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
1021                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
1022                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
1023                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
1024                         goto nla_put_failure;
1025
1026                 /* add VHT info */
1027                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1028                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1029                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1030                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1031                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1032                                  dev->wiphy.bands[band]->vht_cap.cap)))
1033                         goto nla_put_failure;
1034
1035                 /* add frequencies */
1036                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1037                 if (!nl_freqs)
1038                         goto nla_put_failure;
1039
1040                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1041                         nl_freq = nla_nest_start(msg, i);
1042                         if (!nl_freq)
1043                                 goto nla_put_failure;
1044
1045                         chan = &dev->wiphy.bands[band]->channels[i];
1046
1047                         if (nl80211_msg_put_channel(msg, chan))
1048                                 goto nla_put_failure;
1049
1050                         nla_nest_end(msg, nl_freq);
1051                 }
1052
1053                 nla_nest_end(msg, nl_freqs);
1054
1055                 /* add bitrates */
1056                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1057                 if (!nl_rates)
1058                         goto nla_put_failure;
1059
1060                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1061                         nl_rate = nla_nest_start(msg, i);
1062                         if (!nl_rate)
1063                                 goto nla_put_failure;
1064
1065                         rate = &dev->wiphy.bands[band]->bitrates[i];
1066                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1067                                         rate->bitrate))
1068                                 goto nla_put_failure;
1069                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1070                             nla_put_flag(msg,
1071                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1072                                 goto nla_put_failure;
1073
1074                         nla_nest_end(msg, nl_rate);
1075                 }
1076
1077                 nla_nest_end(msg, nl_rates);
1078
1079                 nla_nest_end(msg, nl_band);
1080         }
1081         nla_nest_end(msg, nl_bands);
1082
1083         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1084         if (!nl_cmds)
1085                 goto nla_put_failure;
1086
1087         i = 0;
1088 #define CMD(op, n)                                              \
1089          do {                                                   \
1090                 if (dev->ops->op) {                             \
1091                         i++;                                    \
1092                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1093                                 goto nla_put_failure;           \
1094                 }                                               \
1095         } while (0)
1096
1097         CMD(add_virtual_intf, NEW_INTERFACE);
1098         CMD(change_virtual_intf, SET_INTERFACE);
1099         CMD(add_key, NEW_KEY);
1100         CMD(start_ap, START_AP);
1101         CMD(add_station, NEW_STATION);
1102         CMD(add_mpath, NEW_MPATH);
1103         CMD(update_mesh_config, SET_MESH_CONFIG);
1104         CMD(change_bss, SET_BSS);
1105         CMD(auth, AUTHENTICATE);
1106         CMD(assoc, ASSOCIATE);
1107         CMD(deauth, DEAUTHENTICATE);
1108         CMD(disassoc, DISASSOCIATE);
1109         CMD(join_ibss, JOIN_IBSS);
1110         CMD(join_mesh, JOIN_MESH);
1111         CMD(set_pmksa, SET_PMKSA);
1112         CMD(del_pmksa, DEL_PMKSA);
1113         CMD(flush_pmksa, FLUSH_PMKSA);
1114         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1115                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1116         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1117         CMD(mgmt_tx, FRAME);
1118         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1119         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1120                 i++;
1121                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1122                         goto nla_put_failure;
1123         }
1124         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1125             dev->ops->join_mesh) {
1126                 i++;
1127                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1128                         goto nla_put_failure;
1129         }
1130         CMD(set_wds_peer, SET_WDS_PEER);
1131         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1132                 CMD(tdls_mgmt, TDLS_MGMT);
1133                 CMD(tdls_oper, TDLS_OPER);
1134         }
1135         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1136                 CMD(sched_scan_start, START_SCHED_SCAN);
1137         CMD(probe_client, PROBE_CLIENT);
1138         CMD(set_noack_map, SET_NOACK_MAP);
1139         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1140                 i++;
1141                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1142                         goto nla_put_failure;
1143         }
1144         CMD(start_p2p_device, START_P2P_DEVICE);
1145         CMD(set_mcast_rate, SET_MCAST_RATE);
1146
1147 #ifdef CONFIG_NL80211_TESTMODE
1148         CMD(testmode_cmd, TESTMODE);
1149 #endif
1150
1151 #undef CMD
1152
1153         if (dev->ops->connect || dev->ops->auth) {
1154                 i++;
1155                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1156                         goto nla_put_failure;
1157         }
1158
1159         if (dev->ops->disconnect || dev->ops->deauth) {
1160                 i++;
1161                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1162                         goto nla_put_failure;
1163         }
1164
1165         nla_nest_end(msg, nl_cmds);
1166
1167         if (dev->ops->remain_on_channel &&
1168             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1169             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1170                         dev->wiphy.max_remain_on_channel_duration))
1171                 goto nla_put_failure;
1172
1173         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1174             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1175                 goto nla_put_failure;
1176
1177         if (mgmt_stypes) {
1178                 u16 stypes;
1179                 struct nlattr *nl_ftypes, *nl_ifs;
1180                 enum nl80211_iftype ift;
1181
1182                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1183                 if (!nl_ifs)
1184                         goto nla_put_failure;
1185
1186                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1187                         nl_ftypes = nla_nest_start(msg, ift);
1188                         if (!nl_ftypes)
1189                                 goto nla_put_failure;
1190                         i = 0;
1191                         stypes = mgmt_stypes[ift].tx;
1192                         while (stypes) {
1193                                 if ((stypes & 1) &&
1194                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1195                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1196                                         goto nla_put_failure;
1197                                 stypes >>= 1;
1198                                 i++;
1199                         }
1200                         nla_nest_end(msg, nl_ftypes);
1201                 }
1202
1203                 nla_nest_end(msg, nl_ifs);
1204
1205                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1206                 if (!nl_ifs)
1207                         goto nla_put_failure;
1208
1209                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1210                         nl_ftypes = nla_nest_start(msg, ift);
1211                         if (!nl_ftypes)
1212                                 goto nla_put_failure;
1213                         i = 0;
1214                         stypes = mgmt_stypes[ift].rx;
1215                         while (stypes) {
1216                                 if ((stypes & 1) &&
1217                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1218                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1219                                         goto nla_put_failure;
1220                                 stypes >>= 1;
1221                                 i++;
1222                         }
1223                         nla_nest_end(msg, nl_ftypes);
1224                 }
1225                 nla_nest_end(msg, nl_ifs);
1226         }
1227
1228 #ifdef CONFIG_PM
1229         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1230                 struct nlattr *nl_wowlan;
1231
1232                 nl_wowlan = nla_nest_start(msg,
1233                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1234                 if (!nl_wowlan)
1235                         goto nla_put_failure;
1236
1237                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1238                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1239                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1240                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1241                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1242                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1243                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1244                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1245                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1246                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1247                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1248                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1249                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1250                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1251                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1252                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1253                     goto nla_put_failure;
1254                 if (dev->wiphy.wowlan.n_patterns) {
1255                         struct nl80211_wowlan_pattern_support pat = {
1256                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1257                                 .min_pattern_len =
1258                                         dev->wiphy.wowlan.pattern_min_len,
1259                                 .max_pattern_len =
1260                                         dev->wiphy.wowlan.pattern_max_len,
1261                                 .max_pkt_offset =
1262                                         dev->wiphy.wowlan.max_pkt_offset,
1263                         };
1264                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1265                                     sizeof(pat), &pat))
1266                                 goto nla_put_failure;
1267                 }
1268
1269                 nla_nest_end(msg, nl_wowlan);
1270         }
1271 #endif
1272
1273         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1274                                 dev->wiphy.software_iftypes))
1275                 goto nla_put_failure;
1276
1277         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1278                 goto nla_put_failure;
1279
1280         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1281             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1282                         dev->wiphy.ap_sme_capa))
1283                 goto nla_put_failure;
1284
1285         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1286                         dev->wiphy.features))
1287                 goto nla_put_failure;
1288
1289         if (dev->wiphy.ht_capa_mod_mask &&
1290             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1291                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1292                     dev->wiphy.ht_capa_mod_mask))
1293                 goto nla_put_failure;
1294
1295         if (dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
1296             dev->wiphy.max_acl_mac_addrs &&
1297             nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
1298                         dev->wiphy.max_acl_mac_addrs))
1299                 goto nla_put_failure;
1300
1301         return genlmsg_end(msg, hdr);
1302
1303  nla_put_failure:
1304         genlmsg_cancel(msg, hdr);
1305         return -EMSGSIZE;
1306 }
1307
1308 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1309 {
1310         int idx = 0, ret;
1311         int start = cb->args[0];
1312         struct cfg80211_registered_device *dev;
1313
1314         mutex_lock(&cfg80211_mutex);
1315         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1316                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1317                         continue;
1318                 if (++idx <= start)
1319                         continue;
1320                 ret = nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1321                                          cb->nlh->nlmsg_seq, NLM_F_MULTI,
1322                                          dev);
1323                 if (ret < 0) {
1324                         /*
1325                          * If sending the wiphy data didn't fit (ENOBUFS or
1326                          * EMSGSIZE returned), this SKB is still empty (so
1327                          * it's not too big because another wiphy dataset is
1328                          * already in the skb) and we've not tried to adjust
1329                          * the dump allocation yet ... then adjust the alloc
1330                          * size to be bigger, and return 1 but with the empty
1331                          * skb. This results in an empty message being RX'ed
1332                          * in userspace, but that is ignored.
1333                          *
1334                          * We can then retry with the larger buffer.
1335                          */
1336                         if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
1337                             !skb->len &&
1338                             cb->min_dump_alloc < 4096) {
1339                                 cb->min_dump_alloc = 4096;
1340                                 mutex_unlock(&cfg80211_mutex);
1341                                 return 1;
1342                         }
1343                         idx--;
1344                         break;
1345                 }
1346         }
1347         mutex_unlock(&cfg80211_mutex);
1348
1349         cb->args[0] = idx;
1350
1351         return skb->len;
1352 }
1353
1354 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1355 {
1356         struct sk_buff *msg;
1357         struct cfg80211_registered_device *dev = info->user_ptr[0];
1358
1359         msg = nlmsg_new(4096, GFP_KERNEL);
1360         if (!msg)
1361                 return -ENOMEM;
1362
1363         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1364                 nlmsg_free(msg);
1365                 return -ENOBUFS;
1366         }
1367
1368         return genlmsg_reply(msg, info);
1369 }
1370
1371 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1372         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1373         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1374         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1375         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1376         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1377 };
1378
1379 static int parse_txq_params(struct nlattr *tb[],
1380                             struct ieee80211_txq_params *txq_params)
1381 {
1382         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1383             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1384             !tb[NL80211_TXQ_ATTR_AIFS])
1385                 return -EINVAL;
1386
1387         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1388         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1389         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1390         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1391         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1392
1393         if (txq_params->ac >= NL80211_NUM_ACS)
1394                 return -EINVAL;
1395
1396         return 0;
1397 }
1398
1399 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1400 {
1401         /*
1402          * You can only set the channel explicitly for WDS interfaces,
1403          * all others have their channel managed via their respective
1404          * "establish a connection" command (connect, join, ...)
1405          *
1406          * For AP/GO and mesh mode, the channel can be set with the
1407          * channel userspace API, but is only stored and passed to the
1408          * low-level driver when the AP starts or the mesh is joined.
1409          * This is for backward compatibility, userspace can also give
1410          * the channel in the start-ap or join-mesh commands instead.
1411          *
1412          * Monitors are special as they are normally slaved to
1413          * whatever else is going on, so they have their own special
1414          * operation to set the monitor channel if possible.
1415          */
1416         return !wdev ||
1417                 wdev->iftype == NL80211_IFTYPE_AP ||
1418                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1419                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1420                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1421 }
1422
1423 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1424                                  struct genl_info *info,
1425                                  struct cfg80211_chan_def *chandef)
1426 {
1427         u32 control_freq;
1428
1429         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1430                 return -EINVAL;
1431
1432         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1433
1434         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1435         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1436         chandef->center_freq1 = control_freq;
1437         chandef->center_freq2 = 0;
1438
1439         /* Primary channel not allowed */
1440         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1441                 return -EINVAL;
1442
1443         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1444                 enum nl80211_channel_type chantype;
1445
1446                 chantype = nla_get_u32(
1447                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1448
1449                 switch (chantype) {
1450                 case NL80211_CHAN_NO_HT:
1451                 case NL80211_CHAN_HT20:
1452                 case NL80211_CHAN_HT40PLUS:
1453                 case NL80211_CHAN_HT40MINUS:
1454                         cfg80211_chandef_create(chandef, chandef->chan,
1455                                                 chantype);
1456                         break;
1457                 default:
1458                         return -EINVAL;
1459                 }
1460         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1461                 chandef->width =
1462                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1463                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1464                         chandef->center_freq1 =
1465                                 nla_get_u32(
1466                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1467                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1468                         chandef->center_freq2 =
1469                                 nla_get_u32(
1470                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1471         }
1472
1473         if (!cfg80211_chandef_valid(chandef))
1474                 return -EINVAL;
1475
1476         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1477                                      IEEE80211_CHAN_DISABLED))
1478                 return -EINVAL;
1479
1480         return 0;
1481 }
1482
1483 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1484                                  struct wireless_dev *wdev,
1485                                  struct genl_info *info)
1486 {
1487         struct cfg80211_chan_def chandef;
1488         int result;
1489         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1490
1491         if (wdev)
1492                 iftype = wdev->iftype;
1493
1494         if (!nl80211_can_set_dev_channel(wdev))
1495                 return -EOPNOTSUPP;
1496
1497         result = nl80211_parse_chandef(rdev, info, &chandef);
1498         if (result)
1499                 return result;
1500
1501         mutex_lock(&rdev->devlist_mtx);
1502         switch (iftype) {
1503         case NL80211_IFTYPE_AP:
1504         case NL80211_IFTYPE_P2P_GO:
1505                 if (wdev->beacon_interval) {
1506                         result = -EBUSY;
1507                         break;
1508                 }
1509                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1510                         result = -EINVAL;
1511                         break;
1512                 }
1513                 wdev->preset_chandef = chandef;
1514                 result = 0;
1515                 break;
1516         case NL80211_IFTYPE_MESH_POINT:
1517                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1518                 break;
1519         case NL80211_IFTYPE_MONITOR:
1520                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1521                 break;
1522         default:
1523                 result = -EINVAL;
1524         }
1525         mutex_unlock(&rdev->devlist_mtx);
1526
1527         return result;
1528 }
1529
1530 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1531 {
1532         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1533         struct net_device *netdev = info->user_ptr[1];
1534
1535         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1536 }
1537
1538 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1539 {
1540         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1541         struct net_device *dev = info->user_ptr[1];
1542         struct wireless_dev *wdev = dev->ieee80211_ptr;
1543         const u8 *bssid;
1544
1545         if (!info->attrs[NL80211_ATTR_MAC])
1546                 return -EINVAL;
1547
1548         if (netif_running(dev))
1549                 return -EBUSY;
1550
1551         if (!rdev->ops->set_wds_peer)
1552                 return -EOPNOTSUPP;
1553
1554         if (wdev->iftype != NL80211_IFTYPE_WDS)
1555                 return -EOPNOTSUPP;
1556
1557         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1558         return rdev_set_wds_peer(rdev, dev, bssid);
1559 }
1560
1561
1562 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1563 {
1564         struct cfg80211_registered_device *rdev;
1565         struct net_device *netdev = NULL;
1566         struct wireless_dev *wdev;
1567         int result = 0, rem_txq_params = 0;
1568         struct nlattr *nl_txq_params;
1569         u32 changed;
1570         u8 retry_short = 0, retry_long = 0;
1571         u32 frag_threshold = 0, rts_threshold = 0;
1572         u8 coverage_class = 0;
1573
1574         /*
1575          * Try to find the wiphy and netdev. Normally this
1576          * function shouldn't need the netdev, but this is
1577          * done for backward compatibility -- previously
1578          * setting the channel was done per wiphy, but now
1579          * it is per netdev. Previous userland like hostapd
1580          * also passed a netdev to set_wiphy, so that it is
1581          * possible to let that go to the right netdev!
1582          */
1583         mutex_lock(&cfg80211_mutex);
1584
1585         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1586                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1587
1588                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1589                 if (netdev && netdev->ieee80211_ptr) {
1590                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1591                         mutex_lock(&rdev->mtx);
1592                 } else
1593                         netdev = NULL;
1594         }
1595
1596         if (!netdev) {
1597                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1598                                                   info->attrs);
1599                 if (IS_ERR(rdev)) {
1600                         mutex_unlock(&cfg80211_mutex);
1601                         return PTR_ERR(rdev);
1602                 }
1603                 wdev = NULL;
1604                 netdev = NULL;
1605                 result = 0;
1606
1607                 mutex_lock(&rdev->mtx);
1608         } else
1609                 wdev = netdev->ieee80211_ptr;
1610
1611         /*
1612          * end workaround code, by now the rdev is available
1613          * and locked, and wdev may or may not be NULL.
1614          */
1615
1616         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1617                 result = cfg80211_dev_rename(
1618                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1619
1620         mutex_unlock(&cfg80211_mutex);
1621
1622         if (result)
1623                 goto bad_res;
1624
1625         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1626                 struct ieee80211_txq_params txq_params;
1627                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1628
1629                 if (!rdev->ops->set_txq_params) {
1630                         result = -EOPNOTSUPP;
1631                         goto bad_res;
1632                 }
1633
1634                 if (!netdev) {
1635                         result = -EINVAL;
1636                         goto bad_res;
1637                 }
1638
1639                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1640                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1641                         result = -EINVAL;
1642                         goto bad_res;
1643                 }
1644
1645                 if (!netif_running(netdev)) {
1646                         result = -ENETDOWN;
1647                         goto bad_res;
1648                 }
1649
1650                 nla_for_each_nested(nl_txq_params,
1651                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1652                                     rem_txq_params) {
1653                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1654                                   nla_data(nl_txq_params),
1655                                   nla_len(nl_txq_params),
1656                                   txq_params_policy);
1657                         result = parse_txq_params(tb, &txq_params);
1658                         if (result)
1659                                 goto bad_res;
1660
1661                         result = rdev_set_txq_params(rdev, netdev,
1662                                                      &txq_params);
1663                         if (result)
1664                                 goto bad_res;
1665                 }
1666         }
1667
1668         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1669                 result = __nl80211_set_channel(rdev,
1670                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1671                                 info);
1672                 if (result)
1673                         goto bad_res;
1674         }
1675
1676         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1677                 struct wireless_dev *txp_wdev = wdev;
1678                 enum nl80211_tx_power_setting type;
1679                 int idx, mbm = 0;
1680
1681                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1682                         txp_wdev = NULL;
1683
1684                 if (!rdev->ops->set_tx_power) {
1685                         result = -EOPNOTSUPP;
1686                         goto bad_res;
1687                 }
1688
1689                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1690                 type = nla_get_u32(info->attrs[idx]);
1691
1692                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1693                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1694                         result = -EINVAL;
1695                         goto bad_res;
1696                 }
1697
1698                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1699                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1700                         mbm = nla_get_u32(info->attrs[idx]);
1701                 }
1702
1703                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1704                 if (result)
1705                         goto bad_res;
1706         }
1707
1708         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1709             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1710                 u32 tx_ant, rx_ant;
1711                 if ((!rdev->wiphy.available_antennas_tx &&
1712                      !rdev->wiphy.available_antennas_rx) ||
1713                     !rdev->ops->set_antenna) {
1714                         result = -EOPNOTSUPP;
1715                         goto bad_res;
1716                 }
1717
1718                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1719                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1720
1721                 /* reject antenna configurations which don't match the
1722                  * available antenna masks, except for the "all" mask */
1723                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1724                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1725                         result = -EINVAL;
1726                         goto bad_res;
1727                 }
1728
1729                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1730                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1731
1732                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1733                 if (result)
1734                         goto bad_res;
1735         }
1736
1737         changed = 0;
1738
1739         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1740                 retry_short = nla_get_u8(
1741                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1742                 if (retry_short == 0) {
1743                         result = -EINVAL;
1744                         goto bad_res;
1745                 }
1746                 changed |= WIPHY_PARAM_RETRY_SHORT;
1747         }
1748
1749         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1750                 retry_long = nla_get_u8(
1751                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1752                 if (retry_long == 0) {
1753                         result = -EINVAL;
1754                         goto bad_res;
1755                 }
1756                 changed |= WIPHY_PARAM_RETRY_LONG;
1757         }
1758
1759         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1760                 frag_threshold = nla_get_u32(
1761                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1762                 if (frag_threshold < 256) {
1763                         result = -EINVAL;
1764                         goto bad_res;
1765                 }
1766                 if (frag_threshold != (u32) -1) {
1767                         /*
1768                          * Fragments (apart from the last one) are required to
1769                          * have even length. Make the fragmentation code
1770                          * simpler by stripping LSB should someone try to use
1771                          * odd threshold value.
1772                          */
1773                         frag_threshold &= ~0x1;
1774                 }
1775                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1776         }
1777
1778         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1779                 rts_threshold = nla_get_u32(
1780                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1781                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1782         }
1783
1784         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1785                 coverage_class = nla_get_u8(
1786                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1787                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1788         }
1789
1790         if (changed) {
1791                 u8 old_retry_short, old_retry_long;
1792                 u32 old_frag_threshold, old_rts_threshold;
1793                 u8 old_coverage_class;
1794
1795                 if (!rdev->ops->set_wiphy_params) {
1796                         result = -EOPNOTSUPP;
1797                         goto bad_res;
1798                 }
1799
1800                 old_retry_short = rdev->wiphy.retry_short;
1801                 old_retry_long = rdev->wiphy.retry_long;
1802                 old_frag_threshold = rdev->wiphy.frag_threshold;
1803                 old_rts_threshold = rdev->wiphy.rts_threshold;
1804                 old_coverage_class = rdev->wiphy.coverage_class;
1805
1806                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1807                         rdev->wiphy.retry_short = retry_short;
1808                 if (changed & WIPHY_PARAM_RETRY_LONG)
1809                         rdev->wiphy.retry_long = retry_long;
1810                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1811                         rdev->wiphy.frag_threshold = frag_threshold;
1812                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1813                         rdev->wiphy.rts_threshold = rts_threshold;
1814                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1815                         rdev->wiphy.coverage_class = coverage_class;
1816
1817                 result = rdev_set_wiphy_params(rdev, changed);
1818                 if (result) {
1819                         rdev->wiphy.retry_short = old_retry_short;
1820                         rdev->wiphy.retry_long = old_retry_long;
1821                         rdev->wiphy.frag_threshold = old_frag_threshold;
1822                         rdev->wiphy.rts_threshold = old_rts_threshold;
1823                         rdev->wiphy.coverage_class = old_coverage_class;
1824                 }
1825         }
1826
1827  bad_res:
1828         mutex_unlock(&rdev->mtx);
1829         if (netdev)
1830                 dev_put(netdev);
1831         return result;
1832 }
1833
1834 static inline u64 wdev_id(struct wireless_dev *wdev)
1835 {
1836         return (u64)wdev->identifier |
1837                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1838 }
1839
1840 static int nl80211_send_chandef(struct sk_buff *msg,
1841                                  struct cfg80211_chan_def *chandef)
1842 {
1843         WARN_ON(!cfg80211_chandef_valid(chandef));
1844
1845         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1846                         chandef->chan->center_freq))
1847                 return -ENOBUFS;
1848         switch (chandef->width) {
1849         case NL80211_CHAN_WIDTH_20_NOHT:
1850         case NL80211_CHAN_WIDTH_20:
1851         case NL80211_CHAN_WIDTH_40:
1852                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1853                                 cfg80211_get_chandef_type(chandef)))
1854                         return -ENOBUFS;
1855                 break;
1856         default:
1857                 break;
1858         }
1859         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1860                 return -ENOBUFS;
1861         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1862                 return -ENOBUFS;
1863         if (chandef->center_freq2 &&
1864             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1865                 return -ENOBUFS;
1866         return 0;
1867 }
1868
1869 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1870                               struct cfg80211_registered_device *rdev,
1871                               struct wireless_dev *wdev)
1872 {
1873         struct net_device *dev = wdev->netdev;
1874         void *hdr;
1875
1876         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1877         if (!hdr)
1878                 return -1;
1879
1880         if (dev &&
1881             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1882              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1883                 goto nla_put_failure;
1884
1885         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1886             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1887             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1888             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1889             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1890                         rdev->devlist_generation ^
1891                         (cfg80211_rdev_list_generation << 2)))
1892                 goto nla_put_failure;
1893
1894         if (rdev->ops->get_channel) {
1895                 int ret;
1896                 struct cfg80211_chan_def chandef;
1897
1898                 ret = rdev_get_channel(rdev, wdev, &chandef);
1899                 if (ret == 0) {
1900                         if (nl80211_send_chandef(msg, &chandef))
1901                                 goto nla_put_failure;
1902                 }
1903         }
1904
1905         if (wdev->ssid_len) {
1906                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1907                         goto nla_put_failure;
1908         }
1909
1910         return genlmsg_end(msg, hdr);
1911
1912  nla_put_failure:
1913         genlmsg_cancel(msg, hdr);
1914         return -EMSGSIZE;
1915 }
1916
1917 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1918 {
1919         int wp_idx = 0;
1920         int if_idx = 0;
1921         int wp_start = cb->args[0];
1922         int if_start = cb->args[1];
1923         struct cfg80211_registered_device *rdev;
1924         struct wireless_dev *wdev;
1925
1926         mutex_lock(&cfg80211_mutex);
1927         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1928                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1929                         continue;
1930                 if (wp_idx < wp_start) {
1931                         wp_idx++;
1932                         continue;
1933                 }
1934                 if_idx = 0;
1935
1936                 mutex_lock(&rdev->devlist_mtx);
1937                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1938                         if (if_idx < if_start) {
1939                                 if_idx++;
1940                                 continue;
1941                         }
1942                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1943                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1944                                                rdev, wdev) < 0) {
1945                                 mutex_unlock(&rdev->devlist_mtx);
1946                                 goto out;
1947                         }
1948                         if_idx++;
1949                 }
1950                 mutex_unlock(&rdev->devlist_mtx);
1951
1952                 wp_idx++;
1953         }
1954  out:
1955         mutex_unlock(&cfg80211_mutex);
1956
1957         cb->args[0] = wp_idx;
1958         cb->args[1] = if_idx;
1959
1960         return skb->len;
1961 }
1962
1963 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1964 {
1965         struct sk_buff *msg;
1966         struct cfg80211_registered_device *dev = info->user_ptr[0];
1967         struct wireless_dev *wdev = info->user_ptr[1];
1968
1969         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1970         if (!msg)
1971                 return -ENOMEM;
1972
1973         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1974                                dev, wdev) < 0) {
1975                 nlmsg_free(msg);
1976                 return -ENOBUFS;
1977         }
1978
1979         return genlmsg_reply(msg, info);
1980 }
1981
1982 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1983         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1984         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1985         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1986         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1987         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1988 };
1989
1990 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1991 {
1992         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1993         int flag;
1994
1995         *mntrflags = 0;
1996
1997         if (!nla)
1998                 return -EINVAL;
1999
2000         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
2001                              nla, mntr_flags_policy))
2002                 return -EINVAL;
2003
2004         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
2005                 if (flags[flag])
2006                         *mntrflags |= (1<<flag);
2007
2008         return 0;
2009 }
2010
2011 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
2012                                struct net_device *netdev, u8 use_4addr,
2013                                enum nl80211_iftype iftype)
2014 {
2015         if (!use_4addr) {
2016                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
2017                         return -EBUSY;
2018                 return 0;
2019         }
2020
2021         switch (iftype) {
2022         case NL80211_IFTYPE_AP_VLAN:
2023                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
2024                         return 0;
2025                 break;
2026         case NL80211_IFTYPE_STATION:
2027                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2028                         return 0;
2029                 break;
2030         default:
2031                 break;
2032         }
2033
2034         return -EOPNOTSUPP;
2035 }
2036
2037 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2038 {
2039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2040         struct vif_params params;
2041         int err;
2042         enum nl80211_iftype otype, ntype;
2043         struct net_device *dev = info->user_ptr[1];
2044         u32 _flags, *flags = NULL;
2045         bool change = false;
2046
2047         memset(&params, 0, sizeof(params));
2048
2049         otype = ntype = dev->ieee80211_ptr->iftype;
2050
2051         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2052                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2053                 if (otype != ntype)
2054                         change = true;
2055                 if (ntype > NL80211_IFTYPE_MAX)
2056                         return -EINVAL;
2057         }
2058
2059         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2060                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2061
2062                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2063                         return -EINVAL;
2064                 if (netif_running(dev))
2065                         return -EBUSY;
2066
2067                 wdev_lock(wdev);
2068                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2069                              IEEE80211_MAX_MESH_ID_LEN);
2070                 wdev->mesh_id_up_len =
2071                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2072                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2073                        wdev->mesh_id_up_len);
2074                 wdev_unlock(wdev);
2075         }
2076
2077         if (info->attrs[NL80211_ATTR_4ADDR]) {
2078                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2079                 change = true;
2080                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2081                 if (err)
2082                         return err;
2083         } else {
2084                 params.use_4addr = -1;
2085         }
2086
2087         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2088                 if (ntype != NL80211_IFTYPE_MONITOR)
2089                         return -EINVAL;
2090                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2091                                           &_flags);
2092                 if (err)
2093                         return err;
2094
2095                 flags = &_flags;
2096                 change = true;
2097         }
2098
2099         if (change)
2100                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2101         else
2102                 err = 0;
2103
2104         if (!err && params.use_4addr != -1)
2105                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2106
2107         return err;
2108 }
2109
2110 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2111 {
2112         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2113         struct vif_params params;
2114         struct wireless_dev *wdev;
2115         struct sk_buff *msg;
2116         int err;
2117         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2118         u32 flags;
2119
2120         memset(&params, 0, sizeof(params));
2121
2122         if (!info->attrs[NL80211_ATTR_IFNAME])
2123                 return -EINVAL;
2124
2125         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2126                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2127                 if (type > NL80211_IFTYPE_MAX)
2128                         return -EINVAL;
2129         }
2130
2131         if (!rdev->ops->add_virtual_intf ||
2132             !(rdev->wiphy.interface_modes & (1 << type)))
2133                 return -EOPNOTSUPP;
2134
2135         if (type == NL80211_IFTYPE_P2P_DEVICE && info->attrs[NL80211_ATTR_MAC]) {
2136                 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
2137                            ETH_ALEN);
2138                 if (!is_valid_ether_addr(params.macaddr))
2139                         return -EADDRNOTAVAIL;
2140         }
2141
2142         if (info->attrs[NL80211_ATTR_4ADDR]) {
2143                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2144                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2145                 if (err)
2146                         return err;
2147         }
2148
2149         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2150         if (!msg)
2151                 return -ENOMEM;
2152
2153         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2154                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2155                                   &flags);
2156         wdev = rdev_add_virtual_intf(rdev,
2157                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2158                                 type, err ? NULL : &flags, &params);
2159         if (IS_ERR(wdev)) {
2160                 nlmsg_free(msg);
2161                 return PTR_ERR(wdev);
2162         }
2163
2164         switch (type) {
2165         case NL80211_IFTYPE_MESH_POINT:
2166                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2167                         break;
2168                 wdev_lock(wdev);
2169                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2170                              IEEE80211_MAX_MESH_ID_LEN);
2171                 wdev->mesh_id_up_len =
2172                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2173                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2174                        wdev->mesh_id_up_len);
2175                 wdev_unlock(wdev);
2176                 break;
2177         case NL80211_IFTYPE_P2P_DEVICE:
2178                 /*
2179                  * P2P Device doesn't have a netdev, so doesn't go
2180                  * through the netdev notifier and must be added here
2181                  */
2182                 mutex_init(&wdev->mtx);
2183                 INIT_LIST_HEAD(&wdev->event_list);
2184                 spin_lock_init(&wdev->event_lock);
2185                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2186                 spin_lock_init(&wdev->mgmt_registrations_lock);
2187
2188                 mutex_lock(&rdev->devlist_mtx);
2189                 wdev->identifier = ++rdev->wdev_id;
2190                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2191                 rdev->devlist_generation++;
2192                 mutex_unlock(&rdev->devlist_mtx);
2193                 break;
2194         default:
2195                 break;
2196         }
2197
2198         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2199                                rdev, wdev) < 0) {
2200                 nlmsg_free(msg);
2201                 return -ENOBUFS;
2202         }
2203
2204         return genlmsg_reply(msg, info);
2205 }
2206
2207 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2208 {
2209         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2210         struct wireless_dev *wdev = info->user_ptr[1];
2211
2212         if (!rdev->ops->del_virtual_intf)
2213                 return -EOPNOTSUPP;
2214
2215         /*
2216          * If we remove a wireless device without a netdev then clear
2217          * user_ptr[1] so that nl80211_post_doit won't dereference it
2218          * to check if it needs to do dev_put(). Otherwise it crashes
2219          * since the wdev has been freed, unlike with a netdev where
2220          * we need the dev_put() for the netdev to really be freed.
2221          */
2222         if (!wdev->netdev)
2223                 info->user_ptr[1] = NULL;
2224
2225         return rdev_del_virtual_intf(rdev, wdev);
2226 }
2227
2228 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2229 {
2230         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2231         struct net_device *dev = info->user_ptr[1];
2232         u16 noack_map;
2233
2234         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2235                 return -EINVAL;
2236
2237         if (!rdev->ops->set_noack_map)
2238                 return -EOPNOTSUPP;
2239
2240         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2241
2242         return rdev_set_noack_map(rdev, dev, noack_map);
2243 }
2244
2245 struct get_key_cookie {
2246         struct sk_buff *msg;
2247         int error;
2248         int idx;
2249 };
2250
2251 static void get_key_callback(void *c, struct key_params *params)
2252 {
2253         struct nlattr *key;
2254         struct get_key_cookie *cookie = c;
2255
2256         if ((params->key &&
2257              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2258                      params->key_len, params->key)) ||
2259             (params->seq &&
2260              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2261                      params->seq_len, params->seq)) ||
2262             (params->cipher &&
2263              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2264                          params->cipher)))
2265                 goto nla_put_failure;
2266
2267         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2268         if (!key)
2269                 goto nla_put_failure;
2270
2271         if ((params->key &&
2272              nla_put(cookie->msg, NL80211_KEY_DATA,
2273                      params->key_len, params->key)) ||
2274             (params->seq &&
2275              nla_put(cookie->msg, NL80211_KEY_SEQ,
2276                      params->seq_len, params->seq)) ||
2277             (params->cipher &&
2278              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2279                          params->cipher)))
2280                 goto nla_put_failure;
2281
2282         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2283                 goto nla_put_failure;
2284
2285         nla_nest_end(cookie->msg, key);
2286
2287         return;
2288  nla_put_failure:
2289         cookie->error = 1;
2290 }
2291
2292 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2293 {
2294         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2295         int err;
2296         struct net_device *dev = info->user_ptr[1];
2297         u8 key_idx = 0;
2298         const u8 *mac_addr = NULL;
2299         bool pairwise;
2300         struct get_key_cookie cookie = {
2301                 .error = 0,
2302         };
2303         void *hdr;
2304         struct sk_buff *msg;
2305
2306         if (info->attrs[NL80211_ATTR_KEY_IDX])
2307                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2308
2309         if (key_idx > 5)
2310                 return -EINVAL;
2311
2312         if (info->attrs[NL80211_ATTR_MAC])
2313                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2314
2315         pairwise = !!mac_addr;
2316         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2317                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2318                 if (kt >= NUM_NL80211_KEYTYPES)
2319                         return -EINVAL;
2320                 if (kt != NL80211_KEYTYPE_GROUP &&
2321                     kt != NL80211_KEYTYPE_PAIRWISE)
2322                         return -EINVAL;
2323                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2324         }
2325
2326         if (!rdev->ops->get_key)
2327                 return -EOPNOTSUPP;
2328
2329         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2330         if (!msg)
2331                 return -ENOMEM;
2332
2333         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2334                              NL80211_CMD_NEW_KEY);
2335         if (IS_ERR(hdr))
2336                 return PTR_ERR(hdr);
2337
2338         cookie.msg = msg;
2339         cookie.idx = key_idx;
2340
2341         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2342             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2343                 goto nla_put_failure;
2344         if (mac_addr &&
2345             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2346                 goto nla_put_failure;
2347
2348         if (pairwise && mac_addr &&
2349             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2350                 return -ENOENT;
2351
2352         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2353                            get_key_callback);
2354
2355         if (err)
2356                 goto free_msg;
2357
2358         if (cookie.error)
2359                 goto nla_put_failure;
2360
2361         genlmsg_end(msg, hdr);
2362         return genlmsg_reply(msg, info);
2363
2364  nla_put_failure:
2365         err = -ENOBUFS;
2366  free_msg:
2367         nlmsg_free(msg);
2368         return err;
2369 }
2370
2371 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2372 {
2373         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2374         struct key_parse key;
2375         int err;
2376         struct net_device *dev = info->user_ptr[1];
2377
2378         err = nl80211_parse_key(info, &key);
2379         if (err)
2380                 return err;
2381
2382         if (key.idx < 0)
2383                 return -EINVAL;
2384
2385         /* only support setting default key */
2386         if (!key.def && !key.defmgmt)
2387                 return -EINVAL;
2388
2389         wdev_lock(dev->ieee80211_ptr);
2390
2391         if (key.def) {
2392                 if (!rdev->ops->set_default_key) {
2393                         err = -EOPNOTSUPP;
2394                         goto out;
2395                 }
2396
2397                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2398                 if (err)
2399                         goto out;
2400
2401                 err = rdev_set_default_key(rdev, dev, key.idx,
2402                                                  key.def_uni, key.def_multi);
2403
2404                 if (err)
2405                         goto out;
2406
2407 #ifdef CONFIG_CFG80211_WEXT
2408                 dev->ieee80211_ptr->wext.default_key = key.idx;
2409 #endif
2410         } else {
2411                 if (key.def_uni || !key.def_multi) {
2412                         err = -EINVAL;
2413                         goto out;
2414                 }
2415
2416                 if (!rdev->ops->set_default_mgmt_key) {
2417                         err = -EOPNOTSUPP;
2418                         goto out;
2419                 }
2420
2421                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2422                 if (err)
2423                         goto out;
2424
2425                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2426                 if (err)
2427                         goto out;
2428
2429 #ifdef CONFIG_CFG80211_WEXT
2430                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2431 #endif
2432         }
2433
2434  out:
2435         wdev_unlock(dev->ieee80211_ptr);
2436
2437         return err;
2438 }
2439
2440 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2441 {
2442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2443         int err;
2444         struct net_device *dev = info->user_ptr[1];
2445         struct key_parse key;
2446         const u8 *mac_addr = NULL;
2447
2448         err = nl80211_parse_key(info, &key);
2449         if (err)
2450                 return err;
2451
2452         if (!key.p.key)
2453                 return -EINVAL;
2454
2455         if (info->attrs[NL80211_ATTR_MAC])
2456                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2457
2458         if (key.type == -1) {
2459                 if (mac_addr)
2460                         key.type = NL80211_KEYTYPE_PAIRWISE;
2461                 else
2462                         key.type = NL80211_KEYTYPE_GROUP;
2463         }
2464
2465         /* for now */
2466         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2467             key.type != NL80211_KEYTYPE_GROUP)
2468                 return -EINVAL;
2469
2470         if (!rdev->ops->add_key)
2471                 return -EOPNOTSUPP;
2472
2473         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2474                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2475                                            mac_addr))
2476                 return -EINVAL;
2477
2478         wdev_lock(dev->ieee80211_ptr);
2479         err = nl80211_key_allowed(dev->ieee80211_ptr);
2480         if (!err)
2481                 err = rdev_add_key(rdev, dev, key.idx,
2482                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2483                                     mac_addr, &key.p);
2484         wdev_unlock(dev->ieee80211_ptr);
2485
2486         return err;
2487 }
2488
2489 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2490 {
2491         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2492         int err;
2493         struct net_device *dev = info->user_ptr[1];
2494         u8 *mac_addr = NULL;
2495         struct key_parse key;
2496
2497         err = nl80211_parse_key(info, &key);
2498         if (err)
2499                 return err;
2500
2501         if (info->attrs[NL80211_ATTR_MAC])
2502                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2503
2504         if (key.type == -1) {
2505                 if (mac_addr)
2506                         key.type = NL80211_KEYTYPE_PAIRWISE;
2507                 else
2508                         key.type = NL80211_KEYTYPE_GROUP;
2509         }
2510
2511         /* for now */
2512         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2513             key.type != NL80211_KEYTYPE_GROUP)
2514                 return -EINVAL;
2515
2516         if (!rdev->ops->del_key)
2517                 return -EOPNOTSUPP;
2518
2519         wdev_lock(dev->ieee80211_ptr);
2520         err = nl80211_key_allowed(dev->ieee80211_ptr);
2521
2522         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2523             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2524                 err = -ENOENT;
2525
2526         if (!err)
2527                 err = rdev_del_key(rdev, dev, key.idx,
2528                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2529                                    mac_addr);
2530
2531 #ifdef CONFIG_CFG80211_WEXT
2532         if (!err) {
2533                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2534                         dev->ieee80211_ptr->wext.default_key = -1;
2535                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2536                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2537         }
2538 #endif
2539         wdev_unlock(dev->ieee80211_ptr);
2540
2541         return err;
2542 }
2543
2544 /* This function returns an error or the number of nested attributes */
2545 static int validate_acl_mac_addrs(struct nlattr *nl_attr)
2546 {
2547         struct nlattr *attr;
2548         int n_entries = 0, tmp;
2549
2550         nla_for_each_nested(attr, nl_attr, tmp) {
2551                 if (nla_len(attr) != ETH_ALEN)
2552                         return -EINVAL;
2553
2554                 n_entries++;
2555         }
2556
2557         return n_entries;
2558 }
2559
2560 /*
2561  * This function parses ACL information and allocates memory for ACL data.
2562  * On successful return, the calling function is responsible to free the
2563  * ACL buffer returned by this function.
2564  */
2565 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
2566                                                 struct genl_info *info)
2567 {
2568         enum nl80211_acl_policy acl_policy;
2569         struct nlattr *attr;
2570         struct cfg80211_acl_data *acl;
2571         int i = 0, n_entries, tmp;
2572
2573         if (!wiphy->max_acl_mac_addrs)
2574                 return ERR_PTR(-EOPNOTSUPP);
2575
2576         if (!info->attrs[NL80211_ATTR_ACL_POLICY])
2577                 return ERR_PTR(-EINVAL);
2578
2579         acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
2580         if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
2581             acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
2582                 return ERR_PTR(-EINVAL);
2583
2584         if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
2585                 return ERR_PTR(-EINVAL);
2586
2587         n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
2588         if (n_entries < 0)
2589                 return ERR_PTR(n_entries);
2590
2591         if (n_entries > wiphy->max_acl_mac_addrs)
2592                 return ERR_PTR(-ENOTSUPP);
2593
2594         acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries),
2595                       GFP_KERNEL);
2596         if (!acl)
2597                 return ERR_PTR(-ENOMEM);
2598
2599         nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
2600                 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
2601                 i++;
2602         }
2603
2604         acl->n_acl_entries = n_entries;
2605         acl->acl_policy = acl_policy;
2606
2607         return acl;
2608 }
2609
2610 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
2611 {
2612         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2613         struct net_device *dev = info->user_ptr[1];
2614         struct cfg80211_acl_data *acl;
2615         int err;
2616
2617         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2618             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2619                 return -EOPNOTSUPP;
2620
2621         if (!dev->ieee80211_ptr->beacon_interval)
2622                 return -EINVAL;
2623
2624         acl = parse_acl_data(&rdev->wiphy, info);
2625         if (IS_ERR(acl))
2626                 return PTR_ERR(acl);
2627
2628         err = rdev_set_mac_acl(rdev, dev, acl);
2629
2630         kfree(acl);
2631
2632         return err;
2633 }
2634
2635 static int nl80211_parse_beacon(struct genl_info *info,
2636                                 struct cfg80211_beacon_data *bcn)
2637 {
2638         bool haveinfo = false;
2639
2640         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2641             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2642             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2643             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2644                 return -EINVAL;
2645
2646         memset(bcn, 0, sizeof(*bcn));
2647
2648         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2649                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2650                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2651                 if (!bcn->head_len)
2652                         return -EINVAL;
2653                 haveinfo = true;
2654         }
2655
2656         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2657                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2658                 bcn->tail_len =
2659                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2660                 haveinfo = true;
2661         }
2662
2663         if (!haveinfo)
2664                 return -EINVAL;
2665
2666         if (info->attrs[NL80211_ATTR_IE]) {
2667                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2668                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2669         }
2670
2671         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2672                 bcn->proberesp_ies =
2673                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2674                 bcn->proberesp_ies_len =
2675                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2676         }
2677
2678         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2679                 bcn->assocresp_ies =
2680                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2681                 bcn->assocresp_ies_len =
2682                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2683         }
2684
2685         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2686                 bcn->probe_resp =
2687                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2688                 bcn->probe_resp_len =
2689                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2690         }
2691
2692         return 0;
2693 }
2694
2695 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2696                                    struct cfg80211_ap_settings *params)
2697 {
2698         struct wireless_dev *wdev;
2699         bool ret = false;
2700
2701         mutex_lock(&rdev->devlist_mtx);
2702
2703         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2704                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2705                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2706                         continue;
2707
2708                 if (!wdev->preset_chandef.chan)
2709                         continue;
2710
2711                 params->chandef = wdev->preset_chandef;
2712                 ret = true;
2713                 break;
2714         }
2715
2716         mutex_unlock(&rdev->devlist_mtx);
2717
2718         return ret;
2719 }
2720
2721 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2722                                     enum nl80211_auth_type auth_type,
2723                                     enum nl80211_commands cmd)
2724 {
2725         if (auth_type > NL80211_AUTHTYPE_MAX)
2726                 return false;
2727
2728         switch (cmd) {
2729         case NL80211_CMD_AUTHENTICATE:
2730                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2731                     auth_type == NL80211_AUTHTYPE_SAE)
2732                         return false;
2733                 return true;
2734         case NL80211_CMD_CONNECT:
2735         case NL80211_CMD_START_AP:
2736                 /* SAE not supported yet */
2737                 if (auth_type == NL80211_AUTHTYPE_SAE)
2738                         return false;
2739                 return true;
2740         default:
2741                 return false;
2742         }
2743 }
2744
2745 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2746 {
2747         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2748         struct net_device *dev = info->user_ptr[1];
2749         struct wireless_dev *wdev = dev->ieee80211_ptr;
2750         struct cfg80211_ap_settings params;
2751         int err;
2752         u8 radar_detect_width = 0;
2753
2754         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2755             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2756                 return -EOPNOTSUPP;
2757
2758         if (!rdev->ops->start_ap)
2759                 return -EOPNOTSUPP;
2760
2761         if (wdev->beacon_interval)
2762                 return -EALREADY;
2763
2764         memset(&params, 0, sizeof(params));
2765
2766         /* these are required for START_AP */
2767         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2768             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2769             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2770                 return -EINVAL;
2771
2772         err = nl80211_parse_beacon(info, &params.beacon);
2773         if (err)
2774                 return err;
2775
2776         params.beacon_interval =
2777                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2778         params.dtim_period =
2779                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2780
2781         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2782         if (err)
2783                 return err;
2784
2785         /*
2786          * In theory, some of these attributes should be required here
2787          * but since they were not used when the command was originally
2788          * added, keep them optional for old user space programs to let
2789          * them continue to work with drivers that do not need the
2790          * additional information -- drivers must check!
2791          */
2792         if (info->attrs[NL80211_ATTR_SSID]) {
2793                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2794                 params.ssid_len =
2795                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2796                 if (params.ssid_len == 0 ||
2797                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2798                         return -EINVAL;
2799         }
2800
2801         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2802                 params.hidden_ssid = nla_get_u32(
2803                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2804                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2805                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2806                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2807                         return -EINVAL;
2808         }
2809
2810         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2811
2812         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2813                 params.auth_type = nla_get_u32(
2814                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2815                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2816                                              NL80211_CMD_START_AP))
2817                         return -EINVAL;
2818         } else
2819                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2820
2821         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2822                                       NL80211_MAX_NR_CIPHER_SUITES);
2823         if (err)
2824                 return err;
2825
2826         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2827                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2828                         return -EOPNOTSUPP;
2829                 params.inactivity_timeout = nla_get_u16(
2830                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2831         }
2832
2833         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
2834                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2835                         return -EINVAL;
2836                 params.p2p_ctwindow =
2837                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
2838                 if (params.p2p_ctwindow > 127)
2839                         return -EINVAL;
2840                 if (params.p2p_ctwindow != 0 &&
2841                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
2842                         return -EINVAL;
2843         }
2844
2845         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
2846                 u8 tmp;
2847
2848                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2849                         return -EINVAL;
2850                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
2851                 if (tmp > 1)
2852                         return -EINVAL;
2853                 params.p2p_opp_ps = tmp;
2854                 if (params.p2p_opp_ps != 0 &&
2855                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
2856                         return -EINVAL;
2857         }
2858
2859         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2860                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2861                 if (err)
2862                         return err;
2863         } else if (wdev->preset_chandef.chan) {
2864                 params.chandef = wdev->preset_chandef;
2865         } else if (!nl80211_get_ap_channel(rdev, &params))
2866                 return -EINVAL;
2867
2868         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2869                 return -EINVAL;
2870
2871         err = cfg80211_chandef_dfs_required(wdev->wiphy, &params.chandef);
2872         if (err < 0)
2873                 return err;
2874         if (err) {
2875                 radar_detect_width = BIT(params.chandef.width);
2876                 params.radar_required = true;
2877         }
2878
2879         mutex_lock(&rdev->devlist_mtx);
2880         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
2881                                            params.chandef.chan,
2882                                            CHAN_MODE_SHARED,
2883                                            radar_detect_width);
2884         mutex_unlock(&rdev->devlist_mtx);
2885
2886         if (err)
2887                 return err;
2888
2889         if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
2890                 params.acl = parse_acl_data(&rdev->wiphy, info);
2891                 if (IS_ERR(params.acl))
2892                         return PTR_ERR(params.acl);
2893         }
2894
2895         err = rdev_start_ap(rdev, dev, &params);
2896         if (!err) {
2897                 wdev->preset_chandef = params.chandef;
2898                 wdev->beacon_interval = params.beacon_interval;
2899                 wdev->channel = params.chandef.chan;
2900                 wdev->ssid_len = params.ssid_len;
2901                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2902         }
2903
2904         kfree(params.acl);
2905
2906         return err;
2907 }
2908
2909 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2910 {
2911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2912         struct net_device *dev = info->user_ptr[1];
2913         struct wireless_dev *wdev = dev->ieee80211_ptr;
2914         struct cfg80211_beacon_data params;
2915         int err;
2916
2917         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2918             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2919                 return -EOPNOTSUPP;
2920
2921         if (!rdev->ops->change_beacon)
2922                 return -EOPNOTSUPP;
2923
2924         if (!wdev->beacon_interval)
2925                 return -EINVAL;
2926
2927         err = nl80211_parse_beacon(info, &params);
2928         if (err)
2929                 return err;
2930
2931         return rdev_change_beacon(rdev, dev, &params);
2932 }
2933
2934 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2935 {
2936         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2937         struct net_device *dev = info->user_ptr[1];
2938
2939         return cfg80211_stop_ap(rdev, dev);
2940 }
2941
2942 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2943         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2944         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2945         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2946         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2947         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2948         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2949 };
2950
2951 static int parse_station_flags(struct genl_info *info,
2952                                enum nl80211_iftype iftype,
2953                                struct station_parameters *params)
2954 {
2955         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2956         struct nlattr *nla;
2957         int flag;
2958
2959         /*
2960          * Try parsing the new attribute first so userspace
2961          * can specify both for older kernels.
2962          */
2963         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2964         if (nla) {
2965                 struct nl80211_sta_flag_update *sta_flags;
2966
2967                 sta_flags = nla_data(nla);
2968                 params->sta_flags_mask = sta_flags->mask;
2969                 params->sta_flags_set = sta_flags->set;
2970                 if ((params->sta_flags_mask |
2971                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2972                         return -EINVAL;
2973                 return 0;
2974         }
2975
2976         /* if present, parse the old attribute */
2977
2978         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2979         if (!nla)
2980                 return 0;
2981
2982         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2983                              nla, sta_flags_policy))
2984                 return -EINVAL;
2985
2986         /*
2987          * Only allow certain flags for interface types so that
2988          * other attributes are silently ignored. Remember that
2989          * this is backward compatibility code with old userspace
2990          * and shouldn't be hit in other cases anyway.
2991          */
2992         switch (iftype) {
2993         case NL80211_IFTYPE_AP:
2994         case NL80211_IFTYPE_AP_VLAN:
2995         case NL80211_IFTYPE_P2P_GO:
2996                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2997                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2998                                          BIT(NL80211_STA_FLAG_WME) |
2999                                          BIT(NL80211_STA_FLAG_MFP);
3000                 break;
3001         case NL80211_IFTYPE_P2P_CLIENT:
3002         case NL80211_IFTYPE_STATION:
3003                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
3004                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
3005                 break;
3006         case NL80211_IFTYPE_MESH_POINT:
3007                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3008                                          BIT(NL80211_STA_FLAG_MFP) |
3009                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
3010         default:
3011                 return -EINVAL;
3012         }
3013
3014         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
3015                 if (flags[flag]) {
3016                         params->sta_flags_set |= (1<<flag);
3017
3018                         /* no longer support new API additions in old API */
3019                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
3020                                 return -EINVAL;
3021                 }
3022         }
3023
3024         return 0;
3025 }
3026
3027 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
3028                                  int attr)
3029 {
3030         struct nlattr *rate;
3031         u32 bitrate;
3032         u16 bitrate_compat;
3033
3034         rate = nla_nest_start(msg, attr);
3035         if (!rate)
3036                 return false;
3037
3038         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
3039         bitrate = cfg80211_calculate_bitrate(info);
3040         /* report 16-bit bitrate only if we can */
3041         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
3042         if (bitrate > 0 &&
3043             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
3044                 return false;
3045         if (bitrate_compat > 0 &&
3046             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
3047                 return false;
3048
3049         if (info->flags & RATE_INFO_FLAGS_MCS) {
3050                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
3051                         return false;
3052                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3053                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3054                         return false;
3055                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3056                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3057                         return false;
3058         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
3059                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
3060                         return false;
3061                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
3062                         return false;
3063                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
3064                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
3065                         return false;
3066                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
3067                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
3068                         return false;
3069                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
3070                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
3071                         return false;
3072                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
3073                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
3074                         return false;
3075                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
3076                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
3077                         return false;
3078         }
3079
3080         nla_nest_end(msg, rate);
3081         return true;
3082 }
3083
3084 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
3085                                 int flags,
3086                                 struct cfg80211_registered_device *rdev,
3087                                 struct net_device *dev,
3088                                 const u8 *mac_addr, struct station_info *sinfo)
3089 {
3090         void *hdr;
3091         struct nlattr *sinfoattr, *bss_param;
3092
3093         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3094         if (!hdr)
3095                 return -1;
3096
3097         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3098             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
3099             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
3100                 goto nla_put_failure;
3101
3102         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
3103         if (!sinfoattr)
3104                 goto nla_put_failure;
3105         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
3106             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
3107                         sinfo->connected_time))
3108                 goto nla_put_failure;
3109         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
3110             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
3111                         sinfo->inactive_time))
3112                 goto nla_put_failure;
3113         if ((sinfo->filled & (STATION_INFO_RX_BYTES |
3114                               STATION_INFO_RX_BYTES64)) &&
3115             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
3116                         (u32)sinfo->rx_bytes))
3117                 goto nla_put_failure;
3118         if ((sinfo->filled & (STATION_INFO_TX_BYTES |
3119                               NL80211_STA_INFO_TX_BYTES64)) &&
3120             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
3121                         (u32)sinfo->tx_bytes))
3122                 goto nla_put_failure;
3123         if ((sinfo->filled & STATION_INFO_RX_BYTES64) &&
3124             nla_put_u64(msg, NL80211_STA_INFO_RX_BYTES64,
3125                         sinfo->rx_bytes))
3126                 goto nla_put_failure;
3127         if ((sinfo->filled & STATION_INFO_TX_BYTES64) &&
3128             nla_put_u64(msg, NL80211_STA_INFO_TX_BYTES64,
3129                         sinfo->tx_bytes))
3130                 goto nla_put_failure;
3131         if ((sinfo->filled & STATION_INFO_LLID) &&
3132             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
3133                 goto nla_put_failure;
3134         if ((sinfo->filled & STATION_INFO_PLID) &&
3135             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
3136                 goto nla_put_failure;
3137         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
3138             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
3139                        sinfo->plink_state))
3140                 goto nla_put_failure;
3141         switch (rdev->wiphy.signal_type) {
3142         case CFG80211_SIGNAL_TYPE_MBM:
3143                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
3144                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
3145                                sinfo->signal))
3146                         goto nla_put_failure;
3147                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
3148                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
3149                                sinfo->signal_avg))
3150                         goto nla_put_failure;
3151                 break;
3152         default:
3153                 break;
3154         }
3155         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3156                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3157                                           NL80211_STA_INFO_TX_BITRATE))
3158                         goto nla_put_failure;
3159         }
3160         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3161                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3162                                           NL80211_STA_INFO_RX_BITRATE))
3163                         goto nla_put_failure;
3164         }
3165         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3166             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3167                         sinfo->rx_packets))
3168                 goto nla_put_failure;
3169         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3170             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3171                         sinfo->tx_packets))
3172                 goto nla_put_failure;
3173         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3174             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3175                         sinfo->tx_retries))
3176                 goto nla_put_failure;
3177         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3178             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3179                         sinfo->tx_failed))
3180                 goto nla_put_failure;
3181         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3182             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3183                         sinfo->beacon_loss_count))
3184                 goto nla_put_failure;
3185         if ((sinfo->filled & STATION_INFO_LOCAL_PM) &&
3186             nla_put_u32(msg, NL80211_STA_INFO_LOCAL_PM,
3187                         sinfo->local_pm))
3188                 goto nla_put_failure;
3189         if ((sinfo->filled & STATION_INFO_PEER_PM) &&
3190             nla_put_u32(msg, NL80211_STA_INFO_PEER_PM,
3191                         sinfo->peer_pm))
3192                 goto nla_put_failure;
3193         if ((sinfo->filled & STATION_INFO_NONPEER_PM) &&
3194             nla_put_u32(msg, NL80211_STA_INFO_NONPEER_PM,
3195                         sinfo->nonpeer_pm))
3196                 goto nla_put_failure;
3197         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3198                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3199                 if (!bss_param)
3200                         goto nla_put_failure;
3201
3202                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3203                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3204                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3205                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3206                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3207                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3208                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3209                                sinfo->bss_param.dtim_period) ||
3210                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3211                                 sinfo->bss_param.beacon_interval))
3212                         goto nla_put_failure;
3213
3214                 nla_nest_end(msg, bss_param);
3215         }
3216         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3217             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3218                     sizeof(struct nl80211_sta_flag_update),
3219                     &sinfo->sta_flags))
3220                 goto nla_put_failure;
3221         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3222                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3223                             sinfo->t_offset))
3224                 goto nla_put_failure;
3225         nla_nest_end(msg, sinfoattr);
3226
3227         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3228             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3229                     sinfo->assoc_req_ies))
3230                 goto nla_put_failure;
3231
3232         return genlmsg_end(msg, hdr);
3233
3234  nla_put_failure:
3235         genlmsg_cancel(msg, hdr);
3236         return -EMSGSIZE;
3237 }
3238
3239 static int nl80211_dump_station(struct sk_buff *skb,
3240                                 struct netlink_callback *cb)
3241 {
3242         struct station_info sinfo;
3243         struct cfg80211_registered_device *dev;
3244         struct net_device *netdev;
3245         u8 mac_addr[ETH_ALEN];
3246         int sta_idx = cb->args[1];
3247         int err;
3248
3249         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3250         if (err)
3251                 return err;
3252
3253         if (!dev->ops->dump_station) {
3254                 err = -EOPNOTSUPP;
3255                 goto out_err;
3256         }
3257
3258         while (1) {
3259                 memset(&sinfo, 0, sizeof(sinfo));
3260                 err = rdev_dump_station(dev, netdev, sta_idx,
3261                                         mac_addr, &sinfo);
3262                 if (err == -ENOENT)
3263                         break;
3264                 if (err)
3265                         goto out_err;
3266
3267                 if (nl80211_send_station(skb,
3268                                 NETLINK_CB(cb->skb).portid,
3269                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3270                                 dev, netdev, mac_addr,
3271                                 &sinfo) < 0)
3272                         goto out;
3273
3274                 sta_idx++;
3275         }
3276
3277
3278  out:
3279         cb->args[1] = sta_idx;
3280         err = skb->len;
3281  out_err:
3282         nl80211_finish_netdev_dump(dev);
3283
3284         return err;
3285 }
3286
3287 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3288 {
3289         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3290         struct net_device *dev = info->user_ptr[1];
3291         struct station_info sinfo;
3292         struct sk_buff *msg;
3293         u8 *mac_addr = NULL;
3294         int err;
3295
3296         memset(&sinfo, 0, sizeof(sinfo));
3297
3298         if (!info->attrs[NL80211_ATTR_MAC])
3299                 return -EINVAL;
3300
3301         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3302
3303         if (!rdev->ops->get_station)
3304                 return -EOPNOTSUPP;
3305
3306         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3307         if (err)
3308                 return err;
3309
3310         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3311         if (!msg)
3312                 return -ENOMEM;
3313
3314         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3315                                  rdev, dev, mac_addr, &sinfo) < 0) {
3316                 nlmsg_free(msg);
3317                 return -ENOBUFS;
3318         }
3319
3320         return genlmsg_reply(msg, info);
3321 }
3322
3323 /*
3324  * Get vlan interface making sure it is running and on the right wiphy.
3325  */
3326 static struct net_device *get_vlan(struct genl_info *info,
3327                                    struct cfg80211_registered_device *rdev)
3328 {
3329         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3330         struct net_device *v;
3331         int ret;
3332
3333         if (!vlanattr)
3334                 return NULL;
3335
3336         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3337         if (!v)
3338                 return ERR_PTR(-ENODEV);
3339
3340         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3341                 ret = -EINVAL;
3342                 goto error;
3343         }
3344
3345         if (!netif_running(v)) {
3346                 ret = -ENETDOWN;
3347                 goto error;
3348         }
3349
3350         return v;
3351  error:
3352         dev_put(v);
3353         return ERR_PTR(ret);
3354 }
3355
3356 static struct nla_policy
3357 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3358         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3359         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3360 };
3361
3362 static int nl80211_set_station_tdls(struct genl_info *info,
3363                                     struct station_parameters *params)
3364 {
3365         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3366         struct nlattr *nla;
3367         int err;
3368
3369         /* Dummy STA entry gets updated once the peer capabilities are known */
3370         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3371                 params->ht_capa =
3372                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3373         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3374                 params->vht_capa =
3375                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3376
3377         /* parse WME attributes if present */
3378         if (!info->attrs[NL80211_ATTR_STA_WME])
3379                 return 0;
3380
3381         nla = info->attrs[NL80211_ATTR_STA_WME];
3382         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3383                                nl80211_sta_wme_policy);
3384         if (err)
3385                 return err;
3386
3387         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3388                 params->uapsd_queues = nla_get_u8(
3389                         tb[NL80211_STA_WME_UAPSD_QUEUES]);
3390         if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3391                 return -EINVAL;
3392
3393         if (tb[NL80211_STA_WME_MAX_SP])
3394                 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3395
3396         if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3397                 return -EINVAL;
3398
3399         params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3400
3401         return 0;
3402 }
3403
3404 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3405 {
3406         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3407         int err;
3408         struct net_device *dev = info->user_ptr[1];
3409         struct station_parameters params;
3410         u8 *mac_addr = NULL;
3411
3412         memset(&params, 0, sizeof(params));
3413
3414         params.listen_interval = -1;
3415         params.plink_state = -1;
3416
3417         if (info->attrs[NL80211_ATTR_STA_AID])
3418                 return -EINVAL;
3419
3420         if (!info->attrs[NL80211_ATTR_MAC])
3421                 return -EINVAL;
3422
3423         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3424
3425         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3426                 params.supported_rates =
3427                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3428                 params.supported_rates_len =
3429                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3430         }
3431
3432         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3433                 params.capability =
3434                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3435                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3436         }
3437
3438         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3439                 params.ext_capab =
3440                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3441                 params.ext_capab_len =
3442                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3443         }
3444
3445         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3446                 return -EINVAL;
3447
3448         if (!rdev->ops->change_station)
3449                 return -EOPNOTSUPP;
3450
3451         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3452                 return -EINVAL;
3453
3454         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3455                 params.plink_action =
3456                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3457
3458         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3459                 params.plink_state =
3460                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3461
3462         if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) {
3463                 enum nl80211_mesh_power_mode pm = nla_get_u32(
3464                         info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);
3465
3466                 if (pm <= NL80211_MESH_POWER_UNKNOWN ||
3467                     pm > NL80211_MESH_POWER_MAX)
3468                         return -EINVAL;
3469
3470                 params.local_pm = pm;
3471         }
3472
3473         switch (dev->ieee80211_ptr->iftype) {
3474         case NL80211_IFTYPE_AP:
3475         case NL80211_IFTYPE_AP_VLAN:
3476         case NL80211_IFTYPE_P2P_GO:
3477                 /* disallow mesh-specific things */
3478                 if (params.plink_action)
3479                         return -EINVAL;
3480                 if (params.local_pm)
3481                         return -EINVAL;
3482
3483                 /* TDLS can't be set, ... */
3484                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3485                         return -EINVAL;
3486                 /*
3487                  * ... but don't bother the driver with it. This works around
3488                  * a hostapd/wpa_supplicant issue -- it always includes the
3489                  * TLDS_PEER flag in the mask even for AP mode.
3490                  */
3491                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3492
3493                 /* accept only the listed bits */
3494                 if (params.sta_flags_mask &
3495                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3496                                   BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3497                                   BIT(NL80211_STA_FLAG_ASSOCIATED) |
3498                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3499                                   BIT(NL80211_STA_FLAG_WME) |
3500                                   BIT(NL80211_STA_FLAG_MFP)))
3501                         return -EINVAL;
3502
3503                 /* but authenticated/associated only if driver handles it */
3504                 if (!(rdev->wiphy.features &
3505                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3506                     params.sta_flags_mask &
3507                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3508                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3509                         return -EINVAL;
3510
3511                 /* reject other things that can't change */
3512                 if (params.supported_rates)
3513                         return -EINVAL;
3514                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3515                         return -EINVAL;
3516                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3517                         return -EINVAL;
3518                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3519                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3520                         return -EINVAL;
3521
3522                 /* must be last in here for error handling */
3523                 params.vlan = get_vlan(info, rdev);
3524                 if (IS_ERR(params.vlan))
3525                         return PTR_ERR(params.vlan);
3526                 break;
3527         case NL80211_IFTYPE_P2P_CLIENT:
3528         case NL80211_IFTYPE_STATION:
3529                 /*
3530                  * Don't allow userspace to change the TDLS_PEER flag,
3531                  * but silently ignore attempts to change it since we
3532                  * don't have state here to verify that it doesn't try
3533                  * to change the flag.
3534                  */
3535                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3536                 /* Include parameters for TDLS peer (driver will check) */
3537                 err = nl80211_set_station_tdls(info, &params);
3538                 if (err)
3539                         return err;
3540                 /* disallow things sta doesn't support */
3541                 if (params.plink_action)
3542                         return -EINVAL;
3543                 if (params.local_pm)
3544                         return -EINVAL;
3545                 /* reject any changes other than AUTHORIZED or WME (for TDLS) */
3546                 if (params.sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3547                                               BIT(NL80211_STA_FLAG_WME)))
3548                         return -EINVAL;
3549                 break;
3550         case NL80211_IFTYPE_ADHOC:
3551                 /* disallow things sta doesn't support */
3552                 if (params.plink_action)
3553                         return -EINVAL;
3554                 if (params.local_pm)
3555                         return -EINVAL;
3556                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3557                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3558                         return -EINVAL;
3559                 /* reject any changes other than AUTHORIZED */
3560                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3561                         return -EINVAL;
3562                 break;
3563         case NL80211_IFTYPE_MESH_POINT:
3564                 /* disallow things mesh doesn't support */
3565                 if (params.vlan)
3566                         return -EINVAL;
3567                 if (params.supported_rates)
3568                         return -EINVAL;
3569                 if (info->attrs[NL80211_ATTR_STA_CAPABILITY])
3570                         return -EINVAL;
3571                 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY])
3572                         return -EINVAL;
3573                 if (info->attrs[NL80211_ATTR_HT_CAPABILITY] ||
3574                     info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3575                         return -EINVAL;
3576                 /*
3577                  * No special handling for TDLS here -- the userspace
3578                  * mesh code doesn't have this bug.
3579                  */
3580                 if (params.sta_flags_mask &
3581                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3582                                   BIT(NL80211_STA_FLAG_MFP) |
3583                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3584                         return -EINVAL;
3585                 break;
3586         default:
3587                 return -EOPNOTSUPP;
3588         }
3589
3590         /* be aware of params.vlan when changing code here */
3591
3592         err = rdev_change_station(rdev, dev, mac_addr, &params);
3593
3594         if (params.vlan)
3595                 dev_put(params.vlan);
3596
3597         return err;
3598 }
3599
3600 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3601 {
3602         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3603         int err;
3604         struct net_device *dev = info->user_ptr[1];
3605         struct station_parameters params;
3606         u8 *mac_addr = NULL;
3607
3608         memset(&params, 0, sizeof(params));
3609
3610         if (!info->attrs[NL80211_ATTR_MAC])
3611                 return -EINVAL;
3612
3613         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3614                 return -EINVAL;
3615
3616         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3617                 return -EINVAL;
3618
3619         if (!info->attrs[NL80211_ATTR_STA_AID])
3620                 return -EINVAL;
3621
3622         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3623         params.supported_rates =
3624                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3625         params.supported_rates_len =
3626                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3627         params.listen_interval =
3628                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3629
3630         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3631         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3632                 return -EINVAL;
3633
3634         if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
3635                 params.capability =
3636                         nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
3637                 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
3638         }
3639
3640         if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
3641                 params.ext_capab =
3642                         nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3643                 params.ext_capab_len =
3644                         nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
3645         }
3646
3647         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3648                 params.ht_capa =
3649                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3650
3651         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3652                 params.vht_capa =
3653                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3654
3655         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3656                 params.plink_action =
3657                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3658
3659         if (!rdev->ops->add_station)
3660                 return -EOPNOTSUPP;
3661
3662         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3663                 return -EINVAL;
3664
3665         switch (dev->ieee80211_ptr->iftype) {
3666         case NL80211_IFTYPE_AP:
3667         case NL80211_IFTYPE_AP_VLAN:
3668         case NL80211_IFTYPE_P2P_GO:
3669                 /* parse WME attributes if sta is WME capable */
3670                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3671                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3672                     info->attrs[NL80211_ATTR_STA_WME]) {
3673                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3674                         struct nlattr *nla;
3675
3676                         nla = info->attrs[NL80211_ATTR_STA_WME];
3677                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3678                                                nl80211_sta_wme_policy);
3679                         if (err)
3680                                 return err;
3681
3682                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3683                                 params.uapsd_queues =
3684                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3685                         if (params.uapsd_queues &
3686                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3687                                 return -EINVAL;
3688
3689                         if (tb[NL80211_STA_WME_MAX_SP])
3690                                 params.max_sp =
3691                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3692
3693                         if (params.max_sp &
3694                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3695                                 return -EINVAL;
3696
3697                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3698                 }
3699                 /* TDLS peers cannot be added */
3700                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3701                         return -EINVAL;
3702                 /* but don't bother the driver with it */
3703                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3704
3705                 /* allow authenticated/associated only if driver handles it */
3706                 if (!(rdev->wiphy.features &
3707                                 NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
3708                     params.sta_flags_mask &
3709                                 (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3710                                  BIT(NL80211_STA_FLAG_ASSOCIATED)))
3711                         return -EINVAL;
3712
3713                 /* must be last in here for error handling */
3714                 params.vlan = get_vlan(info, rdev);
3715                 if (IS_ERR(params.vlan))
3716                         return PTR_ERR(params.vlan);
3717                 break;
3718         case NL80211_IFTYPE_MESH_POINT:
3719                 /* associated is disallowed */
3720                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3721                         return -EINVAL;
3722                 /* TDLS peers cannot be added */
3723                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3724                         return -EINVAL;
3725                 break;
3726         case NL80211_IFTYPE_STATION:
3727                 /* associated is disallowed */
3728                 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
3729                         return -EINVAL;
3730                 /* Only TDLS peers can be added */
3731                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3732                         return -EINVAL;
3733                 /* Can only add if TDLS ... */
3734                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3735                         return -EOPNOTSUPP;
3736                 /* ... with external setup is supported */
3737                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3738                         return -EOPNOTSUPP;
3739                 break;
3740         default:
3741                 return -EOPNOTSUPP;
3742         }
3743
3744         /* be aware of params.vlan when changing code here */
3745
3746         err = rdev_add_station(rdev, dev, mac_addr, &params);
3747
3748         if (params.vlan)
3749                 dev_put(params.vlan);
3750         return err;
3751 }
3752
3753 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3754 {
3755         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3756         struct net_device *dev = info->user_ptr[1];
3757         u8 *mac_addr = NULL;
3758
3759         if (info->attrs[NL80211_ATTR_MAC])
3760                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3761
3762         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3763             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3764             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3765             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3766                 return -EINVAL;
3767
3768         if (!rdev->ops->del_station)
3769                 return -EOPNOTSUPP;
3770
3771         return rdev_del_station(rdev, dev, mac_addr);
3772 }
3773
3774 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3775                                 int flags, struct net_device *dev,
3776                                 u8 *dst, u8 *next_hop,
3777                                 struct mpath_info *pinfo)
3778 {
3779         void *hdr;
3780         struct nlattr *pinfoattr;
3781
3782         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3783         if (!hdr)
3784                 return -1;
3785
3786         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3787             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3788             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3789             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3790                 goto nla_put_failure;
3791
3792         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3793         if (!pinfoattr)
3794                 goto nla_put_failure;
3795         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3796             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3797                         pinfo->frame_qlen))
3798                 goto nla_put_failure;
3799         if (((pinfo->filled & MPATH_INFO_SN) &&
3800              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3801             ((pinfo->filled & MPATH_INFO_METRIC) &&
3802              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3803                          pinfo->metric)) ||
3804             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3805              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3806                          pinfo->exptime)) ||
3807             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3808              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3809                         pinfo->flags)) ||
3810             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3811              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3812                          pinfo->discovery_timeout)) ||
3813             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3814              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3815                         pinfo->discovery_retries)))
3816                 goto nla_put_failure;
3817
3818         nla_nest_end(msg, pinfoattr);
3819
3820         return genlmsg_end(msg, hdr);
3821
3822  nla_put_failure:
3823         genlmsg_cancel(msg, hdr);
3824         return -EMSGSIZE;
3825 }
3826
3827 static int nl80211_dump_mpath(struct sk_buff *skb,
3828                               struct netlink_callback *cb)
3829 {
3830         struct mpath_info pinfo;
3831         struct cfg80211_registered_device *dev;
3832         struct net_device *netdev;
3833         u8 dst[ETH_ALEN];
3834         u8 next_hop[ETH_ALEN];
3835         int path_idx = cb->args[1];
3836         int err;
3837
3838         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3839         if (err)
3840                 return err;
3841
3842         if (!dev->ops->dump_mpath) {
3843                 err = -EOPNOTSUPP;
3844                 goto out_err;
3845         }
3846
3847         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3848                 err = -EOPNOTSUPP;
3849                 goto out_err;
3850         }
3851
3852         while (1) {
3853                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3854                                       &pinfo);
3855                 if (err == -ENOENT)
3856                         break;
3857                 if (err)
3858                         goto out_err;
3859
3860                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3861                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3862                                        netdev, dst, next_hop,
3863                                        &pinfo) < 0)
3864                         goto out;
3865
3866                 path_idx++;
3867         }
3868
3869
3870  out:
3871         cb->args[1] = path_idx;
3872         err = skb->len;
3873  out_err:
3874         nl80211_finish_netdev_dump(dev);
3875         return err;
3876 }
3877
3878 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3879 {
3880         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3881         int err;
3882         struct net_device *dev = info->user_ptr[1];
3883         struct mpath_info pinfo;
3884         struct sk_buff *msg;
3885         u8 *dst = NULL;
3886         u8 next_hop[ETH_ALEN];
3887
3888         memset(&pinfo, 0, sizeof(pinfo));
3889
3890         if (!info->attrs[NL80211_ATTR_MAC])
3891                 return -EINVAL;
3892
3893         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3894
3895         if (!rdev->ops->get_mpath)
3896                 return -EOPNOTSUPP;
3897
3898         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3899                 return -EOPNOTSUPP;
3900
3901         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3902         if (err)
3903                 return err;
3904
3905         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3906         if (!msg)
3907                 return -ENOMEM;
3908
3909         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3910                                  dev, dst, next_hop, &pinfo) < 0) {
3911                 nlmsg_free(msg);
3912                 return -ENOBUFS;
3913         }
3914
3915         return genlmsg_reply(msg, info);
3916 }
3917
3918 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3919 {
3920         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3921         struct net_device *dev = info->user_ptr[1];
3922         u8 *dst = NULL;
3923         u8 *next_hop = NULL;
3924
3925         if (!info->attrs[NL80211_ATTR_MAC])
3926                 return -EINVAL;
3927
3928         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3929                 return -EINVAL;
3930
3931         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3932         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3933
3934         if (!rdev->ops->change_mpath)
3935                 return -EOPNOTSUPP;
3936
3937         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3938                 return -EOPNOTSUPP;
3939
3940         return rdev_change_mpath(rdev, dev, dst, next_hop);
3941 }
3942
3943 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3944 {
3945         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3946         struct net_device *dev = info->user_ptr[1];
3947         u8 *dst = NULL;
3948         u8 *next_hop = NULL;
3949
3950         if (!info->attrs[NL80211_ATTR_MAC])
3951                 return -EINVAL;
3952
3953         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3954                 return -EINVAL;
3955
3956         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3957         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3958
3959         if (!rdev->ops->add_mpath)
3960                 return -EOPNOTSUPP;
3961
3962         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3963                 return -EOPNOTSUPP;
3964
3965         return rdev_add_mpath(rdev, dev, dst, next_hop);
3966 }
3967
3968 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3969 {
3970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3971         struct net_device *dev = info->user_ptr[1];
3972         u8 *dst = NULL;
3973
3974         if (info->attrs[NL80211_ATTR_MAC])
3975                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3976
3977         if (!rdev->ops->del_mpath)
3978                 return -EOPNOTSUPP;
3979
3980         return rdev_del_mpath(rdev, dev, dst);
3981 }
3982
3983 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3984 {
3985         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3986         struct net_device *dev = info->user_ptr[1];
3987         struct bss_parameters params;
3988
3989         memset(&params, 0, sizeof(params));
3990         /* default to not changing parameters */
3991         params.use_cts_prot = -1;
3992         params.use_short_preamble = -1;
3993         params.use_short_slot_time = -1;
3994         params.ap_isolate = -1;
3995         params.ht_opmode = -1;
3996         params.p2p_ctwindow = -1;
3997         params.p2p_opp_ps = -1;
3998
3999         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
4000                 params.use_cts_prot =
4001                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
4002         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
4003                 params.use_short_preamble =
4004                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
4005         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
4006                 params.use_short_slot_time =
4007                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
4008         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4009                 params.basic_rates =
4010                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4011                 params.basic_rates_len =
4012                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4013         }
4014         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
4015                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
4016         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
4017                 params.ht_opmode =
4018                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
4019
4020         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
4021                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4022                         return -EINVAL;
4023                 params.p2p_ctwindow =
4024                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
4025                 if (params.p2p_ctwindow < 0)
4026                         return -EINVAL;
4027                 if (params.p2p_ctwindow != 0 &&
4028                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
4029                         return -EINVAL;
4030         }
4031
4032         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
4033                 u8 tmp;
4034
4035                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4036                         return -EINVAL;
4037                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
4038                 if (tmp > 1)
4039                         return -EINVAL;
4040                 params.p2p_opp_ps = tmp;
4041                 if (params.p2p_opp_ps &&
4042                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
4043                         return -EINVAL;
4044         }
4045
4046         if (!rdev->ops->change_bss)
4047                 return -EOPNOTSUPP;
4048
4049         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4050             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4051                 return -EOPNOTSUPP;
4052
4053         return rdev_change_bss(rdev, dev, &params);
4054 }
4055
4056 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
4057         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
4058         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
4059         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
4060         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
4061         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
4062         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
4063 };
4064
4065 static int parse_reg_rule(struct nlattr *tb[],
4066         struct ieee80211_reg_rule *reg_rule)
4067 {
4068         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
4069         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
4070
4071         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
4072                 return -EINVAL;
4073         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
4074                 return -EINVAL;
4075         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
4076                 return -EINVAL;
4077         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
4078                 return -EINVAL;
4079         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
4080                 return -EINVAL;
4081
4082         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
4083
4084         freq_range->start_freq_khz =
4085                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
4086         freq_range->end_freq_khz =
4087                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
4088         freq_range->max_bandwidth_khz =
4089                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
4090
4091         power_rule->max_eirp =
4092                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
4093
4094         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
4095                 power_rule->max_antenna_gain =
4096                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
4097
4098         return 0;
4099 }
4100
4101 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
4102 {
4103         int r;
4104         char *data = NULL;
4105         enum nl80211_user_reg_hint_type user_reg_hint_type;
4106
4107         /*
4108          * You should only get this when cfg80211 hasn't yet initialized
4109          * completely when built-in to the kernel right between the time
4110          * window between nl80211_init() and regulatory_init(), if that is
4111          * even possible.
4112          */
4113         if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
4114                 return -EINPROGRESS;
4115
4116         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4117                 return -EINVAL;
4118
4119         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4120
4121         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
4122                 user_reg_hint_type =
4123                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
4124         else
4125                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
4126
4127         switch (user_reg_hint_type) {
4128         case NL80211_USER_REG_HINT_USER:
4129         case NL80211_USER_REG_HINT_CELL_BASE:
4130                 break;
4131         default:
4132                 return -EINVAL;
4133         }
4134
4135         r = regulatory_hint_user(data, user_reg_hint_type);
4136
4137         return r;
4138 }
4139
4140 static int nl80211_get_mesh_config(struct sk_buff *skb,
4141                                    struct genl_info *info)
4142 {
4143         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4144         struct net_device *dev = info->user_ptr[1];
4145         struct wireless_dev *wdev = dev->ieee80211_ptr;
4146         struct mesh_config cur_params;
4147         int err = 0;
4148         void *hdr;
4149         struct nlattr *pinfoattr;
4150         struct sk_buff *msg;
4151
4152         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4153                 return -EOPNOTSUPP;
4154
4155         if (!rdev->ops->get_mesh_config)
4156                 return -EOPNOTSUPP;
4157
4158         wdev_lock(wdev);
4159         /* If not connected, get default parameters */
4160         if (!wdev->mesh_id_len)
4161                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
4162         else
4163                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
4164         wdev_unlock(wdev);
4165
4166         if (err)
4167                 return err;
4168
4169         /* Draw up a netlink message to send back */
4170         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4171         if (!msg)
4172                 return -ENOMEM;
4173         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4174                              NL80211_CMD_GET_MESH_CONFIG);
4175         if (!hdr)
4176                 goto out;
4177         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
4178         if (!pinfoattr)
4179                 goto nla_put_failure;
4180         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
4181             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
4182                         cur_params.dot11MeshRetryTimeout) ||
4183             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4184                         cur_params.dot11MeshConfirmTimeout) ||
4185             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
4186                         cur_params.dot11MeshHoldingTimeout) ||
4187             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
4188                         cur_params.dot11MeshMaxPeerLinks) ||
4189             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
4190                        cur_params.dot11MeshMaxRetries) ||
4191             nla_put_u8(msg, NL80211_MESHCONF_TTL,
4192                        cur_params.dot11MeshTTL) ||
4193             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
4194                        cur_params.element_ttl) ||
4195             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4196                        cur_params.auto_open_plinks) ||
4197             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4198                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
4199             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4200                        cur_params.dot11MeshHWMPmaxPREQretries) ||
4201             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
4202                         cur_params.path_refresh_time) ||
4203             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4204                         cur_params.min_discovery_timeout) ||
4205             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4206                         cur_params.dot11MeshHWMPactivePathTimeout) ||
4207             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4208                         cur_params.dot11MeshHWMPpreqMinInterval) ||
4209             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4210                         cur_params.dot11MeshHWMPperrMinInterval) ||
4211             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4212                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
4213             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
4214                        cur_params.dot11MeshHWMPRootMode) ||
4215             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4216                         cur_params.dot11MeshHWMPRannInterval) ||
4217             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4218                        cur_params.dot11MeshGateAnnouncementProtocol) ||
4219             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
4220                        cur_params.dot11MeshForwarding) ||
4221             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
4222                         cur_params.rssi_threshold) ||
4223             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
4224                         cur_params.ht_opmode) ||
4225             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4226                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
4227             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4228                         cur_params.dot11MeshHWMProotInterval) ||
4229             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4230                         cur_params.dot11MeshHWMPconfirmationInterval) ||
4231             nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
4232                         cur_params.power_mode) ||
4233             nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
4234                         cur_params.dot11MeshAwakeWindowDuration))
4235                 goto nla_put_failure;
4236         nla_nest_end(msg, pinfoattr);
4237         genlmsg_end(msg, hdr);
4238         return genlmsg_reply(msg, info);
4239
4240  nla_put_failure:
4241         genlmsg_cancel(msg, hdr);
4242  out:
4243         nlmsg_free(msg);
4244         return -ENOBUFS;
4245 }
4246
4247 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
4248         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
4249         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
4250         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
4251         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
4252         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
4253         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
4254         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
4255         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
4256         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
4257         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
4258         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
4259         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
4260         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
4261         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
4262         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
4263         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
4264         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
4265         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
4266         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
4267         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
4268         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
4269         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
4270         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
4271         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
4272         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
4273         [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 },
4274         [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
4275 };
4276
4277 static const struct nla_policy
4278         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
4279         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
4280         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
4281         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
4282         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
4283         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
4284                                     .len = IEEE80211_MAX_DATA_LEN },
4285         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
4286 };
4287
4288 static int nl80211_parse_mesh_config(struct genl_info *info,
4289                                      struct mesh_config *cfg,
4290                                      u32 *mask_out)
4291 {
4292         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
4293         u32 mask = 0;
4294
4295 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \
4296 do {                                                                        \
4297         if (tb[attr]) {                                                     \
4298                 if (fn(tb[attr]) < min || fn(tb[attr]) > max)               \
4299                         return -EINVAL;                                     \
4300                 cfg->param = fn(tb[attr]);                                  \
4301                 mask |= (1 << (attr - 1));                                  \
4302         }                                                                   \
4303 } while (0)
4304
4305
4306         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4307                 return -EINVAL;
4308         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4309                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4310                              nl80211_meshconf_params_policy))
4311                 return -EINVAL;
4312
4313         /* This makes sure that there aren't more than 32 mesh config
4314          * parameters (otherwise our bitfield scheme would not work.) */
4315         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4316
4317         /* Fill in the params struct */
4318         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255,
4319                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4320                                   nla_get_u16);
4321         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255,
4322                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4323                                   nla_get_u16);
4324         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255,
4325                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4326                                   nla_get_u16);
4327         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255,
4328                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4329                                   nla_get_u16);
4330         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16,
4331                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4332                                   nla_get_u8);
4333         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255,
4334                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4335         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255,
4336                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4337                                   nla_get_u8);
4338         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1,
4339                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4340                                   nla_get_u8);
4341         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
4342                                   1, 255, mask,
4343                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4344                                   nla_get_u32);
4345         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255,
4346                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4347                                   nla_get_u8);
4348         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535,
4349                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4350                                   nla_get_u32);
4351         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535,
4352                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4353                                   nla_get_u16);
4354         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
4355                                   1, 65535, mask,
4356                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4357                                   nla_get_u32);
4358         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4359                                   1, 65535, mask,
4360                                   NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4361                                   nla_get_u16);
4362         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4363                                   1, 65535, mask,
4364                                   NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4365                                   nla_get_u16);
4366         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4367                                   dot11MeshHWMPnetDiameterTraversalTime,
4368                                   1, 65535, mask,
4369                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4370                                   nla_get_u16);
4371         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4,
4372                                   mask, NL80211_MESHCONF_HWMP_ROOTMODE,
4373                                   nla_get_u8);
4374         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535,
4375                                   mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4376                                   nla_get_u16);
4377         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4378                                   dot11MeshGateAnnouncementProtocol, 0, 1,
4379                                   mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4380                                   nla_get_u8);
4381         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1,
4382                                   mask, NL80211_MESHCONF_FORWARDING,
4383                                   nla_get_u8);
4384         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, 1, 255,
4385                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4386                                   nla_get_u32);
4387         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode, 0, 16,
4388                                   mask, NL80211_MESHCONF_HT_OPMODE,
4389                                   nla_get_u16);
4390         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4391                                   1, 65535, mask,
4392                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4393                                   nla_get_u32);
4394         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535,
4395                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4396                                   nla_get_u16);
4397         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4398                                   dot11MeshHWMPconfirmationInterval,
4399                                   1, 65535, mask,
4400                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4401                                   nla_get_u16);
4402         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode,
4403                                   NL80211_MESH_POWER_ACTIVE,
4404                                   NL80211_MESH_POWER_MAX,
4405                                   mask, NL80211_MESHCONF_POWER_MODE,
4406                                   nla_get_u32);
4407         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration,
4408                                   0, 65535, mask,
4409                                   NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
4410         if (mask_out)
4411                 *mask_out = mask;
4412
4413         return 0;
4414
4415 #undef FILL_IN_MESH_PARAM_IF_SET
4416 }
4417
4418 static int nl80211_parse_mesh_setup(struct genl_info *info,
4419                                      struct mesh_setup *setup)
4420 {
4421         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4422
4423         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4424                 return -EINVAL;
4425         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4426                              info->attrs[NL80211_ATTR_MESH_SETUP],
4427                              nl80211_mesh_setup_params_policy))
4428                 return -EINVAL;
4429
4430         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4431                 setup->sync_method =
4432                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4433                  IEEE80211_SYNC_METHOD_VENDOR :
4434                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4435
4436         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4437                 setup->path_sel_proto =
4438                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4439                  IEEE80211_PATH_PROTOCOL_VENDOR :
4440                  IEEE80211_PATH_PROTOCOL_HWMP;
4441
4442         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4443                 setup->path_metric =
4444                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4445                  IEEE80211_PATH_METRIC_VENDOR :
4446                  IEEE80211_PATH_METRIC_AIRTIME;
4447
4448
4449         if (tb[NL80211_MESH_SETUP_IE]) {
4450                 struct nlattr *ieattr =
4451                         tb[NL80211_MESH_SETUP_IE];
4452                 if (!is_valid_ie_attr(ieattr))
4453                         return -EINVAL;
4454                 setup->ie = nla_data(ieattr);
4455                 setup->ie_len = nla_len(ieattr);
4456         }
4457         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4458         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4459
4460         return 0;
4461 }
4462
4463 static int nl80211_update_mesh_config(struct sk_buff *skb,
4464                                       struct genl_info *info)
4465 {
4466         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4467         struct net_device *dev = info->user_ptr[1];
4468         struct wireless_dev *wdev = dev->ieee80211_ptr;
4469         struct mesh_config cfg;
4470         u32 mask;
4471         int err;
4472
4473         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4474                 return -EOPNOTSUPP;
4475
4476         if (!rdev->ops->update_mesh_config)
4477                 return -EOPNOTSUPP;
4478
4479         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4480         if (err)
4481                 return err;
4482
4483         wdev_lock(wdev);
4484         if (!wdev->mesh_id_len)
4485                 err = -ENOLINK;
4486
4487         if (!err)
4488                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4489
4490         wdev_unlock(wdev);
4491
4492         return err;
4493 }
4494
4495 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4496 {
4497         const struct ieee80211_regdomain *regdom;
4498         struct sk_buff *msg;
4499         void *hdr = NULL;
4500         struct nlattr *nl_reg_rules;
4501         unsigned int i;
4502         int err = -EINVAL;
4503
4504         mutex_lock(&cfg80211_mutex);
4505
4506         if (!cfg80211_regdomain)
4507                 goto out;
4508
4509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4510         if (!msg) {
4511                 err = -ENOBUFS;
4512                 goto out;
4513         }
4514
4515         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4516                              NL80211_CMD_GET_REG);
4517         if (!hdr)
4518                 goto put_failure;
4519
4520         if (reg_last_request_cell_base() &&
4521             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4522                         NL80211_USER_REG_HINT_CELL_BASE))
4523                 goto nla_put_failure;
4524
4525         rcu_read_lock();
4526         regdom = rcu_dereference(cfg80211_regdomain);
4527
4528         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
4529             (regdom->dfs_region &&
4530              nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
4531                 goto nla_put_failure_rcu;
4532
4533         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4534         if (!nl_reg_rules)
4535                 goto nla_put_failure_rcu;
4536
4537         for (i = 0; i < regdom->n_reg_rules; i++) {
4538                 struct nlattr *nl_reg_rule;
4539                 const struct ieee80211_reg_rule *reg_rule;
4540                 const struct ieee80211_freq_range *freq_range;
4541                 const struct ieee80211_power_rule *power_rule;
4542
4543                 reg_rule = &regdom->reg_rules[i];
4544                 freq_range = &reg_rule->freq_range;
4545                 power_rule = &reg_rule->power_rule;
4546
4547                 nl_reg_rule = nla_nest_start(msg, i);
4548                 if (!nl_reg_rule)
4549                         goto nla_put_failure_rcu;
4550
4551                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4552                                 reg_rule->flags) ||
4553                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4554                                 freq_range->start_freq_khz) ||
4555                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4556                                 freq_range->end_freq_khz) ||
4557                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4558                                 freq_range->max_bandwidth_khz) ||
4559                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4560                                 power_rule->max_antenna_gain) ||
4561                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4562                                 power_rule->max_eirp))
4563                         goto nla_put_failure_rcu;
4564
4565                 nla_nest_end(msg, nl_reg_rule);
4566         }
4567         rcu_read_unlock();
4568
4569         nla_nest_end(msg, nl_reg_rules);
4570
4571         genlmsg_end(msg, hdr);
4572         err = genlmsg_reply(msg, info);
4573         goto out;
4574
4575 nla_put_failure_rcu:
4576         rcu_read_unlock();
4577 nla_put_failure:
4578         genlmsg_cancel(msg, hdr);
4579 put_failure:
4580         nlmsg_free(msg);
4581         err = -EMSGSIZE;
4582 out:
4583         mutex_unlock(&cfg80211_mutex);
4584         return err;
4585 }
4586
4587 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4588 {
4589         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4590         struct nlattr *nl_reg_rule;
4591         char *alpha2 = NULL;
4592         int rem_reg_rules = 0, r = 0;
4593         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4594         u8 dfs_region = 0;
4595         struct ieee80211_regdomain *rd = NULL;
4596
4597         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4598                 return -EINVAL;
4599
4600         if (!info->attrs[NL80211_ATTR_REG_RULES])
4601                 return -EINVAL;
4602
4603         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4604
4605         if (info->attrs[NL80211_ATTR_DFS_REGION])
4606                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4607
4608         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4609                             rem_reg_rules) {
4610                 num_rules++;
4611                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4612                         return -EINVAL;
4613         }
4614
4615         size_of_regd = sizeof(struct ieee80211_regdomain) +
4616                        num_rules * sizeof(struct ieee80211_reg_rule);
4617
4618         rd = kzalloc(size_of_regd, GFP_KERNEL);
4619         if (!rd)
4620                 return -ENOMEM;
4621
4622         rd->n_reg_rules = num_rules;
4623         rd->alpha2[0] = alpha2[0];
4624         rd->alpha2[1] = alpha2[1];
4625
4626         /*
4627          * Disable DFS master mode if the DFS region was
4628          * not supported or known on this kernel.
4629          */
4630         if (reg_supported_dfs_region(dfs_region))
4631                 rd->dfs_region = dfs_region;
4632
4633         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4634                             rem_reg_rules) {
4635                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4636                           nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4637                           reg_rule_policy);
4638                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4639                 if (r)
4640                         goto bad_reg;
4641
4642                 rule_idx++;
4643
4644                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4645                         r = -EINVAL;
4646                         goto bad_reg;
4647                 }
4648         }
4649
4650         mutex_lock(&cfg80211_mutex);
4651
4652         r = set_regdom(rd);
4653         /* set_regdom took ownership */
4654         rd = NULL;
4655         mutex_unlock(&cfg80211_mutex);
4656
4657  bad_reg:
4658         kfree(rd);
4659         return r;
4660 }
4661
4662 static int validate_scan_freqs(struct nlattr *freqs)
4663 {
4664         struct nlattr *attr1, *attr2;
4665         int n_channels = 0, tmp1, tmp2;
4666
4667         nla_for_each_nested(attr1, freqs, tmp1) {
4668                 n_channels++;
4669                 /*
4670                  * Some hardware has a limited channel list for
4671                  * scanning, and it is pretty much nonsensical
4672                  * to scan for a channel twice, so disallow that
4673                  * and don't require drivers to check that the
4674                  * channel list they get isn't longer than what
4675                  * they can scan, as long as they can scan all
4676                  * the channels they registered at once.
4677                  */
4678                 nla_for_each_nested(attr2, freqs, tmp2)
4679                         if (attr1 != attr2 &&
4680                             nla_get_u32(attr1) == nla_get_u32(attr2))
4681                                 return 0;
4682         }
4683
4684         return n_channels;
4685 }
4686
4687 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4688 {
4689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4690         struct wireless_dev *wdev = info->user_ptr[1];
4691         struct cfg80211_scan_request *request;
4692         struct nlattr *attr;
4693         struct wiphy *wiphy;
4694         int err, tmp, n_ssids = 0, n_channels, i;
4695         size_t ie_len;
4696
4697         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4698                 return -EINVAL;
4699
4700         wiphy = &rdev->wiphy;
4701
4702         if (!rdev->ops->scan)
4703                 return -EOPNOTSUPP;
4704
4705         mutex_lock(&rdev->sched_scan_mtx);
4706         if (rdev->scan_req) {
4707                 err = -EBUSY;
4708                 goto unlock;
4709         }
4710
4711         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4712                 n_channels = validate_scan_freqs(
4713                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4714                 if (!n_channels) {
4715                         err = -EINVAL;
4716                         goto unlock;
4717                 }
4718         } else {
4719                 enum ieee80211_band band;
4720                 n_channels = 0;
4721
4722                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4723                         if (wiphy->bands[band])
4724                                 n_channels += wiphy->bands[band]->n_channels;
4725         }
4726
4727         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4728                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4729                         n_ssids++;
4730
4731         if (n_ssids > wiphy->max_scan_ssids) {
4732                 err = -EINVAL;
4733                 goto unlock;
4734         }
4735
4736         if (info->attrs[NL80211_ATTR_IE])
4737                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4738         else
4739                 ie_len = 0;
4740
4741         if (ie_len > wiphy->max_scan_ie_len) {
4742                 err = -EINVAL;
4743                 goto unlock;
4744         }
4745
4746         request = kzalloc(sizeof(*request)
4747                         + sizeof(*request->ssids) * n_ssids
4748                         + sizeof(*request->channels) * n_channels
4749                         + ie_len, GFP_KERNEL);
4750         if (!request) {
4751                 err = -ENOMEM;
4752                 goto unlock;
4753         }
4754
4755         if (n_ssids)
4756                 request->ssids = (void *)&request->channels[n_channels];
4757         request->n_ssids = n_ssids;
4758         if (ie_len) {
4759                 if (request->ssids)
4760                         request->ie = (void *)(request->ssids + n_ssids);
4761                 else
4762                         request->ie = (void *)(request->channels + n_channels);
4763         }
4764
4765         i = 0;
4766         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4767                 /* user specified, bail out if channel not found */
4768                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4769                         struct ieee80211_channel *chan;
4770
4771                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4772
4773                         if (!chan) {
4774                                 err = -EINVAL;
4775                                 goto out_free;
4776                         }
4777
4778                         /* ignore disabled channels */
4779                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4780                                 continue;
4781
4782                         request->channels[i] = chan;
4783                         i++;
4784                 }
4785         } else {
4786                 enum ieee80211_band band;
4787
4788                 /* all channels */
4789                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4790                         int j;
4791                         if (!wiphy->bands[band])
4792                                 continue;
4793                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4794                                 struct ieee80211_channel *chan;
4795
4796                                 chan = &wiphy->bands[band]->channels[j];
4797
4798                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4799                                         continue;
4800
4801                                 request->channels[i] = chan;
4802                                 i++;
4803                         }
4804                 }
4805         }
4806
4807         if (!i) {
4808                 err = -EINVAL;
4809                 goto out_free;
4810         }
4811
4812         request->n_channels = i;
4813
4814         i = 0;
4815         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4816                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4817                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4818                                 err = -EINVAL;
4819                                 goto out_free;
4820                         }
4821                         request->ssids[i].ssid_len = nla_len(attr);
4822                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4823                         i++;
4824                 }
4825         }
4826
4827         if (info->attrs[NL80211_ATTR_IE]) {
4828                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4829                 memcpy((void *)request->ie,
4830                        nla_data(info->attrs[NL80211_ATTR_IE]),
4831                        request->ie_len);
4832         }
4833
4834         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4835                 if (wiphy->bands[i])
4836                         request->rates[i] =
4837                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4838
4839         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4840                 nla_for_each_nested(attr,
4841                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4842                                     tmp) {
4843                         enum ieee80211_band band = nla_type(attr);
4844
4845                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4846                                 err = -EINVAL;
4847                                 goto out_free;
4848                         }
4849                         err = ieee80211_get_ratemask(wiphy->bands[band],
4850                                                      nla_data(attr),
4851                                                      nla_len(attr),
4852                                                      &request->rates[band]);
4853                         if (err)
4854                                 goto out_free;
4855                 }
4856         }
4857
4858         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4859                 request->flags = nla_get_u32(
4860                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4861                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4862                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4863                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4864                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4865                         err = -EOPNOTSUPP;
4866                         goto out_free;
4867                 }
4868         }
4869
4870         request->no_cck =
4871                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4872
4873         request->wdev = wdev;
4874         request->wiphy = &rdev->wiphy;
4875         request->scan_start = jiffies;
4876
4877         rdev->scan_req = request;
4878         err = rdev_scan(rdev, request);
4879
4880         if (!err) {
4881                 nl80211_send_scan_start(rdev, wdev);
4882                 if (wdev->netdev)
4883                         dev_hold(wdev->netdev);
4884         } else {
4885  out_free:
4886                 rdev->scan_req = NULL;
4887                 kfree(request);
4888         }
4889
4890  unlock:
4891         mutex_unlock(&rdev->sched_scan_mtx);
4892         return err;
4893 }
4894
4895 static int nl80211_start_sched_scan(struct sk_buff *skb,
4896                                     struct genl_info *info)
4897 {
4898         struct cfg80211_sched_scan_request *request;
4899         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4900         struct net_device *dev = info->user_ptr[1];
4901         struct nlattr *attr;
4902         struct wiphy *wiphy;
4903         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4904         u32 interval;
4905         enum ieee80211_band band;
4906         size_t ie_len;
4907         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4908
4909         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4910             !rdev->ops->sched_scan_start)
4911                 return -EOPNOTSUPP;
4912
4913         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4914                 return -EINVAL;
4915
4916         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4917                 return -EINVAL;
4918
4919         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4920         if (interval == 0)
4921                 return -EINVAL;
4922
4923         wiphy = &rdev->wiphy;
4924
4925         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4926                 n_channels = validate_scan_freqs(
4927                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4928                 if (!n_channels)
4929                         return -EINVAL;
4930         } else {
4931                 n_channels = 0;
4932
4933                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4934                         if (wiphy->bands[band])
4935                                 n_channels += wiphy->bands[band]->n_channels;
4936         }
4937
4938         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4939                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4940                                     tmp)
4941                         n_ssids++;
4942
4943         if (n_ssids > wiphy->max_sched_scan_ssids)
4944                 return -EINVAL;
4945
4946         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4947                 nla_for_each_nested(attr,
4948                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4949                                     tmp)
4950                         n_match_sets++;
4951
4952         if (n_match_sets > wiphy->max_match_sets)
4953                 return -EINVAL;
4954
4955         if (info->attrs[NL80211_ATTR_IE])
4956                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4957         else
4958                 ie_len = 0;
4959
4960         if (ie_len > wiphy->max_sched_scan_ie_len)
4961                 return -EINVAL;
4962
4963         mutex_lock(&rdev->sched_scan_mtx);
4964
4965         if (rdev->sched_scan_req) {
4966                 err = -EINPROGRESS;
4967                 goto out;
4968         }
4969
4970         request = kzalloc(sizeof(*request)
4971                         + sizeof(*request->ssids) * n_ssids
4972                         + sizeof(*request->match_sets) * n_match_sets
4973                         + sizeof(*request->channels) * n_channels
4974                         + ie_len, GFP_KERNEL);
4975         if (!request) {
4976                 err = -ENOMEM;
4977                 goto out;
4978         }
4979
4980         if (n_ssids)
4981                 request->ssids = (void *)&request->channels[n_channels];
4982         request->n_ssids = n_ssids;
4983         if (ie_len) {
4984                 if (request->ssids)
4985                         request->ie = (void *)(request->ssids + n_ssids);
4986                 else
4987                         request->ie = (void *)(request->channels + n_channels);
4988         }
4989
4990         if (n_match_sets) {
4991                 if (request->ie)
4992                         request->match_sets = (void *)(request->ie + ie_len);
4993                 else if (request->ssids)
4994                         request->match_sets =
4995                                 (void *)(request->ssids + n_ssids);
4996                 else
4997                         request->match_sets =
4998                                 (void *)(request->channels + n_channels);
4999         }
5000         request->n_match_sets = n_match_sets;
5001
5002         i = 0;
5003         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
5004                 /* user specified, bail out if channel not found */
5005                 nla_for_each_nested(attr,
5006                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
5007                                     tmp) {
5008                         struct ieee80211_channel *chan;
5009
5010                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
5011
5012                         if (!chan) {
5013                                 err = -EINVAL;
5014                                 goto out_free;
5015                         }
5016
5017                         /* ignore disabled channels */
5018                         if (chan->flags & IEEE80211_CHAN_DISABLED)
5019                                 continue;
5020
5021                         request->channels[i] = chan;
5022                         i++;
5023                 }
5024         } else {
5025                 /* all channels */
5026                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5027                         int j;
5028                         if (!wiphy->bands[band])
5029                                 continue;
5030                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
5031                                 struct ieee80211_channel *chan;
5032
5033                                 chan = &wiphy->bands[band]->channels[j];
5034
5035                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
5036                                         continue;
5037
5038                                 request->channels[i] = chan;
5039                                 i++;
5040                         }
5041                 }
5042         }
5043
5044         if (!i) {
5045                 err = -EINVAL;
5046                 goto out_free;
5047         }
5048
5049         request->n_channels = i;
5050
5051         i = 0;
5052         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
5053                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
5054                                     tmp) {
5055                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
5056                                 err = -EINVAL;
5057                                 goto out_free;
5058                         }
5059                         request->ssids[i].ssid_len = nla_len(attr);
5060                         memcpy(request->ssids[i].ssid, nla_data(attr),
5061                                nla_len(attr));
5062                         i++;
5063                 }
5064         }
5065
5066         i = 0;
5067         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
5068                 nla_for_each_nested(attr,
5069                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
5070                                     tmp) {
5071                         struct nlattr *ssid, *rssi;
5072
5073                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
5074                                   nla_data(attr), nla_len(attr),
5075                                   nl80211_match_policy);
5076                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
5077                         if (ssid) {
5078                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
5079                                         err = -EINVAL;
5080                                         goto out_free;
5081                                 }
5082                                 memcpy(request->match_sets[i].ssid.ssid,
5083                                        nla_data(ssid), nla_len(ssid));
5084                                 request->match_sets[i].ssid.ssid_len =
5085                                         nla_len(ssid);
5086                         }
5087                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
5088                         if (rssi)
5089                                 request->rssi_thold = nla_get_u32(rssi);
5090                         else
5091                                 request->rssi_thold =
5092                                                    NL80211_SCAN_RSSI_THOLD_OFF;
5093                         i++;
5094                 }
5095         }
5096
5097         if (info->attrs[NL80211_ATTR_IE]) {
5098                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5099                 memcpy((void *)request->ie,
5100                        nla_data(info->attrs[NL80211_ATTR_IE]),
5101                        request->ie_len);
5102         }
5103
5104         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
5105                 request->flags = nla_get_u32(
5106                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
5107                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
5108                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
5109                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
5110                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
5111                         err = -EOPNOTSUPP;
5112                         goto out_free;
5113                 }
5114         }
5115
5116         request->dev = dev;
5117         request->wiphy = &rdev->wiphy;
5118         request->interval = interval;
5119         request->scan_start = jiffies;
5120
5121         err = rdev_sched_scan_start(rdev, dev, request);
5122         if (!err) {
5123                 rdev->sched_scan_req = request;
5124                 nl80211_send_sched_scan(rdev, dev,
5125                                         NL80211_CMD_START_SCHED_SCAN);
5126                 goto out;
5127         }
5128
5129 out_free:
5130         kfree(request);
5131 out:
5132         mutex_unlock(&rdev->sched_scan_mtx);
5133         return err;
5134 }
5135
5136 static int nl80211_stop_sched_scan(struct sk_buff *skb,
5137                                    struct genl_info *info)
5138 {
5139         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5140         int err;
5141
5142         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
5143             !rdev->ops->sched_scan_stop)
5144                 return -EOPNOTSUPP;
5145
5146         mutex_lock(&rdev->sched_scan_mtx);
5147         err = __cfg80211_stop_sched_scan(rdev, false);
5148         mutex_unlock(&rdev->sched_scan_mtx);
5149
5150         return err;
5151 }
5152
5153 static int nl80211_start_radar_detection(struct sk_buff *skb,
5154                                          struct genl_info *info)
5155 {
5156         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5157         struct net_device *dev = info->user_ptr[1];
5158         struct wireless_dev *wdev = dev->ieee80211_ptr;
5159         struct cfg80211_chan_def chandef;
5160         int err;
5161
5162         err = nl80211_parse_chandef(rdev, info, &chandef);
5163         if (err)
5164                 return err;
5165
5166         if (wdev->cac_started)
5167                 return -EBUSY;
5168
5169         err = cfg80211_chandef_dfs_required(wdev->wiphy, &chandef);
5170         if (err < 0)
5171                 return err;
5172
5173         if (err == 0)
5174                 return -EINVAL;
5175
5176         if (chandef.chan->dfs_state != NL80211_DFS_USABLE)
5177                 return -EINVAL;
5178
5179         if (!rdev->ops->start_radar_detection)
5180                 return -EOPNOTSUPP;
5181
5182         mutex_lock(&rdev->devlist_mtx);
5183         err = cfg80211_can_use_iftype_chan(rdev, wdev, wdev->iftype,
5184                                            chandef.chan, CHAN_MODE_SHARED,
5185                                            BIT(chandef.width));
5186         if (err)
5187                 goto err_locked;
5188
5189         err = rdev->ops->start_radar_detection(&rdev->wiphy, dev, &chandef);
5190         if (!err) {
5191                 wdev->channel = chandef.chan;
5192                 wdev->cac_started = true;
5193                 wdev->cac_start_time = jiffies;
5194         }
5195 err_locked:
5196         mutex_unlock(&rdev->devlist_mtx);
5197
5198         return err;
5199 }
5200
5201 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
5202                             u32 seq, int flags,
5203                             struct cfg80211_registered_device *rdev,
5204                             struct wireless_dev *wdev,
5205                             struct cfg80211_internal_bss *intbss)
5206 {
5207         struct cfg80211_bss *res = &intbss->pub;
5208         const struct cfg80211_bss_ies *ies;
5209         void *hdr;
5210         struct nlattr *bss;
5211         bool tsf = false;
5212
5213         ASSERT_WDEV_LOCK(wdev);
5214
5215         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
5216                              NL80211_CMD_NEW_SCAN_RESULTS);
5217         if (!hdr)
5218                 return -1;
5219
5220         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
5221
5222         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
5223             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
5224                 goto nla_put_failure;
5225
5226         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
5227         if (!bss)
5228                 goto nla_put_failure;
5229         if ((!is_zero_ether_addr(res->bssid) &&
5230              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
5231                 goto nla_put_failure;
5232
5233         rcu_read_lock();
5234         ies = rcu_dereference(res->ies);
5235         if (ies) {
5236                 if (nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5237                         goto fail_unlock_rcu;
5238                 tsf = true;
5239                 if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
5240                                         ies->len, ies->data))
5241                         goto fail_unlock_rcu;
5242         }
5243         ies = rcu_dereference(res->beacon_ies);
5244         if (ies) {
5245                 if (!tsf && nla_put_u64(msg, NL80211_BSS_TSF, ies->tsf))
5246                         goto fail_unlock_rcu;
5247                 if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
5248                                         ies->len, ies->data))
5249                         goto fail_unlock_rcu;
5250         }
5251         rcu_read_unlock();
5252
5253         if (res->beacon_interval &&
5254             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
5255                 goto nla_put_failure;
5256         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
5257             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
5258             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
5259                         jiffies_to_msecs(jiffies - intbss->ts)))
5260                 goto nla_put_failure;
5261
5262         switch (rdev->wiphy.signal_type) {
5263         case CFG80211_SIGNAL_TYPE_MBM:
5264                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
5265                         goto nla_put_failure;
5266                 break;
5267         case CFG80211_SIGNAL_TYPE_UNSPEC:
5268                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
5269                         goto nla_put_failure;
5270                 break;
5271         default:
5272                 break;
5273         }
5274
5275         switch (wdev->iftype) {
5276         case NL80211_IFTYPE_P2P_CLIENT:
5277         case NL80211_IFTYPE_STATION:
5278                 if (intbss == wdev->current_bss &&
5279                     nla_put_u32(msg, NL80211_BSS_STATUS,
5280                                 NL80211_BSS_STATUS_ASSOCIATED))
5281                         goto nla_put_failure;
5282                 break;
5283         case NL80211_IFTYPE_ADHOC:
5284                 if (intbss == wdev->current_bss &&
5285                     nla_put_u32(msg, NL80211_BSS_STATUS,
5286                                 NL80211_BSS_STATUS_IBSS_JOINED))
5287                         goto nla_put_failure;
5288                 break;
5289         default:
5290                 break;
5291         }
5292
5293         nla_nest_end(msg, bss);
5294
5295         return genlmsg_end(msg, hdr);
5296
5297  fail_unlock_rcu:
5298         rcu_read_unlock();
5299  nla_put_failure:
5300         genlmsg_cancel(msg, hdr);
5301         return -EMSGSIZE;
5302 }
5303
5304 static int nl80211_dump_scan(struct sk_buff *skb,
5305                              struct netlink_callback *cb)
5306 {
5307         struct cfg80211_registered_device *rdev;
5308         struct net_device *dev;
5309         struct cfg80211_internal_bss *scan;
5310         struct wireless_dev *wdev;
5311         int start = cb->args[1], idx = 0;
5312         int err;
5313
5314         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
5315         if (err)
5316                 return err;
5317
5318         wdev = dev->ieee80211_ptr;
5319
5320         wdev_lock(wdev);
5321         spin_lock_bh(&rdev->bss_lock);
5322         cfg80211_bss_expire(rdev);
5323
5324         cb->seq = rdev->bss_generation;
5325
5326         list_for_each_entry(scan, &rdev->bss_list, list) {
5327                 if (++idx <= start)
5328                         continue;
5329                 if (nl80211_send_bss(skb, cb,
5330                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5331                                 rdev, wdev, scan) < 0) {
5332                         idx--;
5333                         break;
5334                 }
5335         }
5336
5337         spin_unlock_bh(&rdev->bss_lock);
5338         wdev_unlock(wdev);
5339
5340         cb->args[1] = idx;
5341         nl80211_finish_netdev_dump(rdev);
5342
5343         return skb->len;
5344 }
5345
5346 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
5347                                 int flags, struct net_device *dev,
5348                                 struct survey_info *survey)
5349 {
5350         void *hdr;
5351         struct nlattr *infoattr;
5352
5353         hdr = nl80211hdr_put(msg, portid, seq, flags,
5354                              NL80211_CMD_NEW_SURVEY_RESULTS);
5355         if (!hdr)
5356                 return -ENOMEM;
5357
5358         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
5359                 goto nla_put_failure;
5360
5361         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
5362         if (!infoattr)
5363                 goto nla_put_failure;
5364
5365         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
5366                         survey->channel->center_freq))
5367                 goto nla_put_failure;
5368
5369         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
5370             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
5371                 goto nla_put_failure;
5372         if ((survey->filled & SURVEY_INFO_IN_USE) &&
5373             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
5374                 goto nla_put_failure;
5375         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
5376             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
5377                         survey->channel_time))
5378                 goto nla_put_failure;
5379         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
5380             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
5381                         survey->channel_time_busy))
5382                 goto nla_put_failure;
5383         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
5384             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5385                         survey->channel_time_ext_busy))
5386                 goto nla_put_failure;
5387         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5388             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5389                         survey->channel_time_rx))
5390                 goto nla_put_failure;
5391         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5392             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5393                         survey->channel_time_tx))
5394                 goto nla_put_failure;
5395
5396         nla_nest_end(msg, infoattr);
5397
5398         return genlmsg_end(msg, hdr);
5399
5400  nla_put_failure:
5401         genlmsg_cancel(msg, hdr);
5402         return -EMSGSIZE;
5403 }
5404
5405 static int nl80211_dump_survey(struct sk_buff *skb,
5406                         struct netlink_callback *cb)
5407 {
5408         struct survey_info survey;
5409         struct cfg80211_registered_device *dev;
5410         struct net_device *netdev;
5411         int survey_idx = cb->args[1];
5412         int res;
5413
5414         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5415         if (res)
5416                 return res;
5417
5418         if (!dev->ops->dump_survey) {
5419                 res = -EOPNOTSUPP;
5420                 goto out_err;
5421         }
5422
5423         while (1) {
5424                 struct ieee80211_channel *chan;
5425
5426                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5427                 if (res == -ENOENT)
5428                         break;
5429                 if (res)
5430                         goto out_err;
5431
5432                 /* Survey without a channel doesn't make sense */
5433                 if (!survey.channel) {
5434                         res = -EINVAL;
5435                         goto out;
5436                 }
5437
5438                 chan = ieee80211_get_channel(&dev->wiphy,
5439                                              survey.channel->center_freq);
5440                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5441                         survey_idx++;
5442                         continue;
5443                 }
5444
5445                 if (nl80211_send_survey(skb,
5446                                 NETLINK_CB(cb->skb).portid,
5447                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5448                                 netdev,
5449                                 &survey) < 0)
5450                         goto out;
5451                 survey_idx++;
5452         }
5453
5454  out:
5455         cb->args[1] = survey_idx;
5456         res = skb->len;
5457  out_err:
5458         nl80211_finish_netdev_dump(dev);
5459         return res;
5460 }
5461
5462 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5463 {
5464         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5465                                   NL80211_WPA_VERSION_2));
5466 }
5467
5468 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5469 {
5470         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5471         struct net_device *dev = info->user_ptr[1];
5472         struct ieee80211_channel *chan;
5473         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5474         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5475         enum nl80211_auth_type auth_type;
5476         struct key_parse key;
5477         bool local_state_change;
5478
5479         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5480                 return -EINVAL;
5481
5482         if (!info->attrs[NL80211_ATTR_MAC])
5483                 return -EINVAL;
5484
5485         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5486                 return -EINVAL;
5487
5488         if (!info->attrs[NL80211_ATTR_SSID])
5489                 return -EINVAL;
5490
5491         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5492                 return -EINVAL;
5493
5494         err = nl80211_parse_key(info, &key);
5495         if (err)
5496                 return err;
5497
5498         if (key.idx >= 0) {
5499                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5500                         return -EINVAL;
5501                 if (!key.p.key || !key.p.key_len)
5502                         return -EINVAL;
5503                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5504                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5505                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5506                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5507                         return -EINVAL;
5508                 if (key.idx > 4)
5509                         return -EINVAL;
5510         } else {
5511                 key.p.key_len = 0;
5512                 key.p.key = NULL;
5513         }
5514
5515         if (key.idx >= 0) {
5516                 int i;
5517                 bool ok = false;
5518                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5519                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5520                                 ok = true;
5521                                 break;
5522                         }
5523                 }
5524                 if (!ok)
5525                         return -EINVAL;
5526         }
5527
5528         if (!rdev->ops->auth)
5529                 return -EOPNOTSUPP;
5530
5531         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5532             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5533                 return -EOPNOTSUPP;
5534
5535         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5536         chan = ieee80211_get_channel(&rdev->wiphy,
5537                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5538         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5539                 return -EINVAL;
5540
5541         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5542         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5543
5544         if (info->attrs[NL80211_ATTR_IE]) {
5545                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5546                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5547         }
5548
5549         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5550         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5551                 return -EINVAL;
5552
5553         if (auth_type == NL80211_AUTHTYPE_SAE &&
5554             !info->attrs[NL80211_ATTR_SAE_DATA])
5555                 return -EINVAL;
5556
5557         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5558                 if (auth_type != NL80211_AUTHTYPE_SAE)
5559                         return -EINVAL;
5560                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5561                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5562                 /* need to include at least Auth Transaction and Status Code */
5563                 if (sae_data_len < 4)
5564                         return -EINVAL;
5565         }
5566
5567         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5568
5569         /*
5570          * Since we no longer track auth state, ignore
5571          * requests to only change local state.
5572          */
5573         if (local_state_change)
5574                 return 0;
5575
5576         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5577                                   ssid, ssid_len, ie, ie_len,
5578                                   key.p.key, key.p.key_len, key.idx,
5579                                   sae_data, sae_data_len);
5580 }
5581
5582 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5583                                    struct genl_info *info,
5584                                    struct cfg80211_crypto_settings *settings,
5585                                    int cipher_limit)
5586 {
5587         memset(settings, 0, sizeof(*settings));
5588
5589         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5590
5591         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5592                 u16 proto;
5593                 proto = nla_get_u16(
5594                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5595                 settings->control_port_ethertype = cpu_to_be16(proto);
5596                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5597                     proto != ETH_P_PAE)
5598                         return -EINVAL;
5599                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5600                         settings->control_port_no_encrypt = true;
5601         } else
5602                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5603
5604         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5605                 void *data;
5606                 int len, i;
5607
5608                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5609                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5610                 settings->n_ciphers_pairwise = len / sizeof(u32);
5611
5612                 if (len % sizeof(u32))
5613                         return -EINVAL;
5614
5615                 if (settings->n_ciphers_pairwise > cipher_limit)
5616                         return -EINVAL;
5617
5618                 memcpy(settings->ciphers_pairwise, data, len);
5619
5620                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5621                         if (!cfg80211_supported_cipher_suite(
5622                                         &rdev->wiphy,
5623                                         settings->ciphers_pairwise[i]))
5624                                 return -EINVAL;
5625         }
5626
5627         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5628                 settings->cipher_group =
5629                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5630                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5631                                                      settings->cipher_group))
5632                         return -EINVAL;
5633         }
5634
5635         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5636                 settings->wpa_versions =
5637                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5638                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5639                         return -EINVAL;
5640         }
5641
5642         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5643                 void *data;
5644                 int len;
5645
5646                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5647                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5648                 settings->n_akm_suites = len / sizeof(u32);
5649
5650                 if (len % sizeof(u32))
5651                         return -EINVAL;
5652
5653                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5654                         return -EINVAL;
5655
5656                 memcpy(settings->akm_suites, data, len);
5657         }
5658
5659         return 0;
5660 }
5661
5662 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5663 {
5664         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5665         struct net_device *dev = info->user_ptr[1];
5666         struct cfg80211_crypto_settings crypto;
5667         struct ieee80211_channel *chan;
5668         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5669         int err, ssid_len, ie_len = 0;
5670         bool use_mfp = false;
5671         u32 flags = 0;
5672         struct ieee80211_ht_cap *ht_capa = NULL;
5673         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5674
5675         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5676                 return -EINVAL;
5677
5678         if (!info->attrs[NL80211_ATTR_MAC] ||
5679             !info->attrs[NL80211_ATTR_SSID] ||
5680             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5681                 return -EINVAL;
5682
5683         if (!rdev->ops->assoc)
5684                 return -EOPNOTSUPP;
5685
5686         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5687             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5688                 return -EOPNOTSUPP;
5689
5690         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5691
5692         chan = ieee80211_get_channel(&rdev->wiphy,
5693                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5694         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5695                 return -EINVAL;
5696
5697         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5698         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5699
5700         if (info->attrs[NL80211_ATTR_IE]) {
5701                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5702                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5703         }
5704
5705         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5706                 enum nl80211_mfp mfp =
5707                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5708                 if (mfp == NL80211_MFP_REQUIRED)
5709                         use_mfp = true;
5710                 else if (mfp != NL80211_MFP_NO)
5711                         return -EINVAL;
5712         }
5713
5714         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5715                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5716
5717         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5718                 flags |= ASSOC_REQ_DISABLE_HT;
5719
5720         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5721                 ht_capa_mask =
5722                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5723
5724         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5725                 if (!ht_capa_mask)
5726                         return -EINVAL;
5727                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5728         }
5729
5730         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5731         if (!err)
5732                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5733                                           ssid, ssid_len, ie, ie_len, use_mfp,
5734                                           &crypto, flags, ht_capa,
5735                                           ht_capa_mask);
5736
5737         return err;
5738 }
5739
5740 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5741 {
5742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5743         struct net_device *dev = info->user_ptr[1];
5744         const u8 *ie = NULL, *bssid;
5745         int ie_len = 0;
5746         u16 reason_code;
5747         bool local_state_change;
5748
5749         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5750                 return -EINVAL;
5751
5752         if (!info->attrs[NL80211_ATTR_MAC])
5753                 return -EINVAL;
5754
5755         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5756                 return -EINVAL;
5757
5758         if (!rdev->ops->deauth)
5759                 return -EOPNOTSUPP;
5760
5761         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5762             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5763                 return -EOPNOTSUPP;
5764
5765         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5766
5767         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5768         if (reason_code == 0) {
5769                 /* Reason Code 0 is reserved */
5770                 return -EINVAL;
5771         }
5772
5773         if (info->attrs[NL80211_ATTR_IE]) {
5774                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5775                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5776         }
5777
5778         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5779
5780         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5781                                     local_state_change);
5782 }
5783
5784 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5785 {
5786         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5787         struct net_device *dev = info->user_ptr[1];
5788         const u8 *ie = NULL, *bssid;
5789         int ie_len = 0;
5790         u16 reason_code;
5791         bool local_state_change;
5792
5793         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5794                 return -EINVAL;
5795
5796         if (!info->attrs[NL80211_ATTR_MAC])
5797                 return -EINVAL;
5798
5799         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5800                 return -EINVAL;
5801
5802         if (!rdev->ops->disassoc)
5803                 return -EOPNOTSUPP;
5804
5805         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5806             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5807                 return -EOPNOTSUPP;
5808
5809         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5810
5811         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5812         if (reason_code == 0) {
5813                 /* Reason Code 0 is reserved */
5814                 return -EINVAL;
5815         }
5816
5817         if (info->attrs[NL80211_ATTR_IE]) {
5818                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5819                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5820         }
5821
5822         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5823
5824         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5825                                       local_state_change);
5826 }
5827
5828 static bool
5829 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5830                          int mcast_rate[IEEE80211_NUM_BANDS],
5831                          int rateval)
5832 {
5833         struct wiphy *wiphy = &rdev->wiphy;
5834         bool found = false;
5835         int band, i;
5836
5837         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5838                 struct ieee80211_supported_band *sband;
5839
5840                 sband = wiphy->bands[band];
5841                 if (!sband)
5842                         continue;
5843
5844                 for (i = 0; i < sband->n_bitrates; i++) {
5845                         if (sband->bitrates[i].bitrate == rateval) {
5846                                 mcast_rate[band] = i + 1;
5847                                 found = true;
5848                                 break;
5849                         }
5850                 }
5851         }
5852
5853         return found;
5854 }
5855
5856 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5857 {
5858         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5859         struct net_device *dev = info->user_ptr[1];
5860         struct cfg80211_ibss_params ibss;
5861         struct wiphy *wiphy;
5862         struct cfg80211_cached_keys *connkeys = NULL;
5863         int err;
5864
5865         memset(&ibss, 0, sizeof(ibss));
5866
5867         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5868                 return -EINVAL;
5869
5870         if (!info->attrs[NL80211_ATTR_SSID] ||
5871             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5872                 return -EINVAL;
5873
5874         ibss.beacon_interval = 100;
5875
5876         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5877                 ibss.beacon_interval =
5878                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5879                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5880                         return -EINVAL;
5881         }
5882
5883         if (!rdev->ops->join_ibss)
5884                 return -EOPNOTSUPP;
5885
5886         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5887                 return -EOPNOTSUPP;
5888
5889         wiphy = &rdev->wiphy;
5890
5891         if (info->attrs[NL80211_ATTR_MAC]) {
5892                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5893
5894                 if (!is_valid_ether_addr(ibss.bssid))
5895                         return -EINVAL;
5896         }
5897         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5898         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5899
5900         if (info->attrs[NL80211_ATTR_IE]) {
5901                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5902                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5903         }
5904
5905         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5906         if (err)
5907                 return err;
5908
5909         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5910                 return -EINVAL;
5911
5912         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5913                 return -EINVAL;
5914         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5915             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5916                 return -EINVAL;
5917
5918         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5919         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5920
5921         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5922                 u8 *rates =
5923                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5924                 int n_rates =
5925                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5926                 struct ieee80211_supported_band *sband =
5927                         wiphy->bands[ibss.chandef.chan->band];
5928
5929                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5930                                              &ibss.basic_rates);
5931                 if (err)
5932                         return err;
5933         }
5934
5935         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5936             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5937                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5938                 return -EINVAL;
5939
5940         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5941                 bool no_ht = false;
5942
5943                 connkeys = nl80211_parse_connkeys(rdev,
5944                                           info->attrs[NL80211_ATTR_KEYS],
5945                                           &no_ht);
5946                 if (IS_ERR(connkeys))
5947                         return PTR_ERR(connkeys);
5948
5949                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5950                     no_ht) {
5951                         kfree(connkeys);
5952                         return -EINVAL;
5953                 }
5954         }
5955
5956         ibss.control_port =
5957                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5958
5959         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5960         if (err)
5961                 kfree(connkeys);
5962         return err;
5963 }
5964
5965 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5966 {
5967         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5968         struct net_device *dev = info->user_ptr[1];
5969
5970         if (!rdev->ops->leave_ibss)
5971                 return -EOPNOTSUPP;
5972
5973         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5974                 return -EOPNOTSUPP;
5975
5976         return cfg80211_leave_ibss(rdev, dev, false);
5977 }
5978
5979 static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
5980 {
5981         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5982         struct net_device *dev = info->user_ptr[1];
5983         int mcast_rate[IEEE80211_NUM_BANDS];
5984         u32 nla_rate;
5985         int err;
5986
5987         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5988             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5989                 return -EOPNOTSUPP;
5990
5991         if (!rdev->ops->set_mcast_rate)
5992                 return -EOPNOTSUPP;
5993
5994         memset(mcast_rate, 0, sizeof(mcast_rate));
5995
5996         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5997                 return -EINVAL;
5998
5999         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
6000         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
6001                 return -EINVAL;
6002
6003         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
6004
6005         return err;
6006 }
6007
6008
6009 #ifdef CONFIG_NL80211_TESTMODE
6010 static struct genl_multicast_group nl80211_testmode_mcgrp = {
6011         .name = "testmode",
6012 };
6013
6014 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
6015 {
6016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6017         int err;
6018
6019         if (!info->attrs[NL80211_ATTR_TESTDATA])
6020                 return -EINVAL;
6021
6022         err = -EOPNOTSUPP;
6023         if (rdev->ops->testmode_cmd) {
6024                 rdev->testmode_info = info;
6025                 err = rdev_testmode_cmd(rdev,
6026                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
6027                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
6028                 rdev->testmode_info = NULL;
6029         }
6030
6031         return err;
6032 }
6033
6034 static int nl80211_testmode_dump(struct sk_buff *skb,
6035                                  struct netlink_callback *cb)
6036 {
6037         struct cfg80211_registered_device *rdev;
6038         int err;
6039         long phy_idx;
6040         void *data = NULL;
6041         int data_len = 0;
6042
6043         if (cb->args[0]) {
6044                 /*
6045                  * 0 is a valid index, but not valid for args[0],
6046                  * so we need to offset by 1.
6047                  */
6048                 phy_idx = cb->args[0] - 1;
6049         } else {
6050                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
6051                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
6052                                   nl80211_policy);
6053                 if (err)
6054                         return err;
6055
6056                 mutex_lock(&cfg80211_mutex);
6057                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
6058                                                   nl80211_fam.attrbuf);
6059                 if (IS_ERR(rdev)) {
6060                         mutex_unlock(&cfg80211_mutex);
6061                         return PTR_ERR(rdev);
6062                 }
6063                 phy_idx = rdev->wiphy_idx;
6064                 rdev = NULL;
6065                 mutex_unlock(&cfg80211_mutex);
6066
6067                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
6068                         cb->args[1] =
6069                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
6070         }
6071
6072         if (cb->args[1]) {
6073                 data = nla_data((void *)cb->args[1]);
6074                 data_len = nla_len((void *)cb->args[1]);
6075         }
6076
6077         mutex_lock(&cfg80211_mutex);
6078         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
6079         if (!rdev) {
6080                 mutex_unlock(&cfg80211_mutex);
6081                 return -ENOENT;
6082         }
6083         cfg80211_lock_rdev(rdev);
6084         mutex_unlock(&cfg80211_mutex);
6085
6086         if (!rdev->ops->testmode_dump) {
6087                 err = -EOPNOTSUPP;
6088                 goto out_err;
6089         }
6090
6091         while (1) {
6092                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
6093                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
6094                                            NL80211_CMD_TESTMODE);
6095                 struct nlattr *tmdata;
6096
6097                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
6098                         genlmsg_cancel(skb, hdr);
6099                         break;
6100                 }
6101
6102                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6103                 if (!tmdata) {
6104                         genlmsg_cancel(skb, hdr);
6105                         break;
6106                 }
6107                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
6108                 nla_nest_end(skb, tmdata);
6109
6110                 if (err == -ENOBUFS || err == -ENOENT) {
6111                         genlmsg_cancel(skb, hdr);
6112                         break;
6113                 } else if (err) {
6114                         genlmsg_cancel(skb, hdr);
6115                         goto out_err;
6116                 }
6117
6118                 genlmsg_end(skb, hdr);
6119         }
6120
6121         err = skb->len;
6122         /* see above */
6123         cb->args[0] = phy_idx + 1;
6124  out_err:
6125         cfg80211_unlock_rdev(rdev);
6126         return err;
6127 }
6128
6129 static struct sk_buff *
6130 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
6131                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
6132 {
6133         struct sk_buff *skb;
6134         void *hdr;
6135         struct nlattr *data;
6136
6137         skb = nlmsg_new(approxlen + 100, gfp);
6138         if (!skb)
6139                 return NULL;
6140
6141         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
6142         if (!hdr) {
6143                 kfree_skb(skb);
6144                 return NULL;
6145         }
6146
6147         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
6148                 goto nla_put_failure;
6149         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
6150
6151         ((void **)skb->cb)[0] = rdev;
6152         ((void **)skb->cb)[1] = hdr;
6153         ((void **)skb->cb)[2] = data;
6154
6155         return skb;
6156
6157  nla_put_failure:
6158         kfree_skb(skb);
6159         return NULL;
6160 }
6161
6162 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
6163                                                   int approxlen)
6164 {
6165         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6166
6167         if (WARN_ON(!rdev->testmode_info))
6168                 return NULL;
6169
6170         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
6171                                 rdev->testmode_info->snd_portid,
6172                                 rdev->testmode_info->snd_seq,
6173                                 GFP_KERNEL);
6174 }
6175 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
6176
6177 int cfg80211_testmode_reply(struct sk_buff *skb)
6178 {
6179         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
6180         void *hdr = ((void **)skb->cb)[1];
6181         struct nlattr *data = ((void **)skb->cb)[2];
6182
6183         if (WARN_ON(!rdev->testmode_info)) {
6184                 kfree_skb(skb);
6185                 return -EINVAL;
6186         }
6187
6188         nla_nest_end(skb, data);
6189         genlmsg_end(skb, hdr);
6190         return genlmsg_reply(skb, rdev->testmode_info);
6191 }
6192 EXPORT_SYMBOL(cfg80211_testmode_reply);
6193
6194 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
6195                                                   int approxlen, gfp_t gfp)
6196 {
6197         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
6198
6199         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
6200 }
6201 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
6202
6203 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
6204 {
6205         void *hdr = ((void **)skb->cb)[1];
6206         struct nlattr *data = ((void **)skb->cb)[2];
6207
6208         nla_nest_end(skb, data);
6209         genlmsg_end(skb, hdr);
6210         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
6211 }
6212 EXPORT_SYMBOL(cfg80211_testmode_event);
6213 #endif
6214
6215 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
6216 {
6217         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6218         struct net_device *dev = info->user_ptr[1];
6219         struct cfg80211_connect_params connect;
6220         struct wiphy *wiphy;
6221         struct cfg80211_cached_keys *connkeys = NULL;
6222         int err;
6223
6224         memset(&connect, 0, sizeof(connect));
6225
6226         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
6227                 return -EINVAL;
6228
6229         if (!info->attrs[NL80211_ATTR_SSID] ||
6230             !nla_len(info->attrs[NL80211_ATTR_SSID]))
6231                 return -EINVAL;
6232
6233         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
6234                 connect.auth_type =
6235                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
6236                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
6237                                              NL80211_CMD_CONNECT))
6238                         return -EINVAL;
6239         } else
6240                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
6241
6242         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
6243
6244         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
6245                                       NL80211_MAX_NR_CIPHER_SUITES);
6246         if (err)
6247                 return err;
6248
6249         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6250             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6251                 return -EOPNOTSUPP;
6252
6253         wiphy = &rdev->wiphy;
6254
6255         connect.bg_scan_period = -1;
6256         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
6257                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
6258                 connect.bg_scan_period =
6259                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
6260         }
6261
6262         if (info->attrs[NL80211_ATTR_MAC])
6263                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6264         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
6265         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
6266
6267         if (info->attrs[NL80211_ATTR_IE]) {
6268                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
6269                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
6270         }
6271
6272         if (info->attrs[NL80211_ATTR_USE_MFP]) {
6273                 connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
6274                 if (connect.mfp != NL80211_MFP_REQUIRED &&
6275                     connect.mfp != NL80211_MFP_NO)
6276                         return -EINVAL;
6277         } else {
6278                 connect.mfp = NL80211_MFP_NO;
6279         }
6280
6281         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6282                 connect.channel =
6283                         ieee80211_get_channel(wiphy,
6284                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
6285                 if (!connect.channel ||
6286                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
6287                         return -EINVAL;
6288         }
6289
6290         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
6291                 connkeys = nl80211_parse_connkeys(rdev,
6292                                           info->attrs[NL80211_ATTR_KEYS], NULL);
6293                 if (IS_ERR(connkeys))
6294                         return PTR_ERR(connkeys);
6295         }
6296
6297         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
6298                 connect.flags |= ASSOC_REQ_DISABLE_HT;
6299
6300         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
6301                 memcpy(&connect.ht_capa_mask,
6302                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
6303                        sizeof(connect.ht_capa_mask));
6304
6305         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
6306                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
6307                         kfree(connkeys);
6308                         return -EINVAL;
6309                 }
6310                 memcpy(&connect.ht_capa,
6311                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
6312                        sizeof(connect.ht_capa));
6313         }
6314
6315         err = cfg80211_connect(rdev, dev, &connect, connkeys);
6316         if (err)
6317                 kfree(connkeys);
6318         return err;
6319 }
6320
6321 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
6322 {
6323         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6324         struct net_device *dev = info->user_ptr[1];
6325         u16 reason;
6326
6327         if (!info->attrs[NL80211_ATTR_REASON_CODE])
6328                 reason = WLAN_REASON_DEAUTH_LEAVING;
6329         else
6330                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
6331
6332         if (reason == 0)
6333                 return -EINVAL;
6334
6335         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6336             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6337                 return -EOPNOTSUPP;
6338
6339         return cfg80211_disconnect(rdev, dev, reason, true);
6340 }
6341
6342 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
6343 {
6344         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6345         struct net *net;
6346         int err;
6347         u32 pid;
6348
6349         if (!info->attrs[NL80211_ATTR_PID])
6350                 return -EINVAL;
6351
6352         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
6353
6354         net = get_net_ns_by_pid(pid);
6355         if (IS_ERR(net))
6356                 return PTR_ERR(net);
6357
6358         err = 0;
6359
6360         /* check if anything to do */
6361         if (!net_eq(wiphy_net(&rdev->wiphy), net))
6362                 err = cfg80211_switch_netns(rdev, net);
6363
6364         put_net(net);
6365         return err;
6366 }
6367
6368 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
6369 {
6370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6371         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
6372                         struct cfg80211_pmksa *pmksa) = NULL;
6373         struct net_device *dev = info->user_ptr[1];
6374         struct cfg80211_pmksa pmksa;
6375
6376         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
6377
6378         if (!info->attrs[NL80211_ATTR_MAC])
6379                 return -EINVAL;
6380
6381         if (!info->attrs[NL80211_ATTR_PMKID])
6382                 return -EINVAL;
6383
6384         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
6385         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
6386
6387         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6388             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6389                 return -EOPNOTSUPP;
6390
6391         switch (info->genlhdr->cmd) {
6392         case NL80211_CMD_SET_PMKSA:
6393                 rdev_ops = rdev->ops->set_pmksa;
6394                 break;
6395         case NL80211_CMD_DEL_PMKSA:
6396                 rdev_ops = rdev->ops->del_pmksa;
6397                 break;
6398         default:
6399                 WARN_ON(1);
6400                 break;
6401         }
6402
6403         if (!rdev_ops)
6404                 return -EOPNOTSUPP;
6405
6406         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6407 }
6408
6409 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6410 {
6411         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6412         struct net_device *dev = info->user_ptr[1];
6413
6414         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6415             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6416                 return -EOPNOTSUPP;
6417
6418         if (!rdev->ops->flush_pmksa)
6419                 return -EOPNOTSUPP;
6420
6421         return rdev_flush_pmksa(rdev, dev);
6422 }
6423
6424 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6425 {
6426         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6427         struct net_device *dev = info->user_ptr[1];
6428         u8 action_code, dialog_token;
6429         u16 status_code;
6430         u8 *peer;
6431
6432         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6433             !rdev->ops->tdls_mgmt)
6434                 return -EOPNOTSUPP;
6435
6436         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6437             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6438             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6439             !info->attrs[NL80211_ATTR_IE] ||
6440             !info->attrs[NL80211_ATTR_MAC])
6441                 return -EINVAL;
6442
6443         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6444         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6445         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6446         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6447
6448         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6449                               dialog_token, status_code,
6450                               nla_data(info->attrs[NL80211_ATTR_IE]),
6451                               nla_len(info->attrs[NL80211_ATTR_IE]));
6452 }
6453
6454 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6455 {
6456         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6457         struct net_device *dev = info->user_ptr[1];
6458         enum nl80211_tdls_operation operation;
6459         u8 *peer;
6460
6461         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6462             !rdev->ops->tdls_oper)
6463                 return -EOPNOTSUPP;
6464
6465         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6466             !info->attrs[NL80211_ATTR_MAC])
6467                 return -EINVAL;
6468
6469         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6470         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6471
6472         return rdev_tdls_oper(rdev, dev, peer, operation);
6473 }
6474
6475 static int nl80211_remain_on_channel(struct sk_buff *skb,
6476                                      struct genl_info *info)
6477 {
6478         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6479         struct wireless_dev *wdev = info->user_ptr[1];
6480         struct cfg80211_chan_def chandef;
6481         struct sk_buff *msg;
6482         void *hdr;
6483         u64 cookie;
6484         u32 duration;
6485         int err;
6486
6487         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6488             !info->attrs[NL80211_ATTR_DURATION])
6489                 return -EINVAL;
6490
6491         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6492
6493         if (!rdev->ops->remain_on_channel ||
6494             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6495                 return -EOPNOTSUPP;
6496
6497         /*
6498          * We should be on that channel for at least a minimum amount of
6499          * time (10ms) but no longer than the driver supports.
6500          */
6501         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6502             duration > rdev->wiphy.max_remain_on_channel_duration)
6503                 return -EINVAL;
6504
6505         err = nl80211_parse_chandef(rdev, info, &chandef);
6506         if (err)
6507                 return err;
6508
6509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6510         if (!msg)
6511                 return -ENOMEM;
6512
6513         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6514                              NL80211_CMD_REMAIN_ON_CHANNEL);
6515
6516         if (IS_ERR(hdr)) {
6517                 err = PTR_ERR(hdr);
6518                 goto free_msg;
6519         }
6520
6521         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6522                                      duration, &cookie);
6523
6524         if (err)
6525                 goto free_msg;
6526
6527         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6528                 goto nla_put_failure;
6529
6530         genlmsg_end(msg, hdr);
6531
6532         return genlmsg_reply(msg, info);
6533
6534  nla_put_failure:
6535         err = -ENOBUFS;
6536  free_msg:
6537         nlmsg_free(msg);
6538         return err;
6539 }
6540
6541 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6542                                             struct genl_info *info)
6543 {
6544         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6545         struct wireless_dev *wdev = info->user_ptr[1];
6546         u64 cookie;
6547
6548         if (!info->attrs[NL80211_ATTR_COOKIE])
6549                 return -EINVAL;
6550
6551         if (!rdev->ops->cancel_remain_on_channel)
6552                 return -EOPNOTSUPP;
6553
6554         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6555
6556         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6557 }
6558
6559 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6560                            u8 *rates, u8 rates_len)
6561 {
6562         u8 i;
6563         u32 mask = 0;
6564
6565         for (i = 0; i < rates_len; i++) {
6566                 int rate = (rates[i] & 0x7f) * 5;
6567                 int ridx;
6568                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6569                         struct ieee80211_rate *srate =
6570                                 &sband->bitrates[ridx];
6571                         if (rate == srate->bitrate) {
6572                                 mask |= 1 << ridx;
6573                                 break;
6574                         }
6575                 }
6576                 if (ridx == sband->n_bitrates)
6577                         return 0; /* rate not found */
6578         }
6579
6580         return mask;
6581 }
6582
6583 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6584                                u8 *rates, u8 rates_len,
6585                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6586 {
6587         u8 i;
6588
6589         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6590
6591         for (i = 0; i < rates_len; i++) {
6592                 int ridx, rbit;
6593
6594                 ridx = rates[i] / 8;
6595                 rbit = BIT(rates[i] % 8);
6596
6597                 /* check validity */
6598                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6599                         return false;
6600
6601                 /* check availability */
6602                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6603                         mcs[ridx] |= rbit;
6604                 else
6605                         return false;
6606         }
6607
6608         return true;
6609 }
6610
6611 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6612         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6613                                     .len = NL80211_MAX_SUPP_RATES },
6614         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6615                                  .len = NL80211_MAX_SUPP_HT_RATES },
6616 };
6617
6618 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6619                                        struct genl_info *info)
6620 {
6621         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6622         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6623         struct cfg80211_bitrate_mask mask;
6624         int rem, i;
6625         struct net_device *dev = info->user_ptr[1];
6626         struct nlattr *tx_rates;
6627         struct ieee80211_supported_band *sband;
6628
6629         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6630                 return -EINVAL;
6631
6632         if (!rdev->ops->set_bitrate_mask)
6633                 return -EOPNOTSUPP;
6634
6635         memset(&mask, 0, sizeof(mask));
6636         /* Default to all rates enabled */
6637         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6638                 sband = rdev->wiphy.bands[i];
6639                 mask.control[i].legacy =
6640                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6641                 if (sband)
6642                         memcpy(mask.control[i].mcs,
6643                                sband->ht_cap.mcs.rx_mask,
6644                                sizeof(mask.control[i].mcs));
6645                 else
6646                         memset(mask.control[i].mcs, 0,
6647                                sizeof(mask.control[i].mcs));
6648         }
6649
6650         /*
6651          * The nested attribute uses enum nl80211_band as the index. This maps
6652          * directly to the enum ieee80211_band values used in cfg80211.
6653          */
6654         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6655         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6656         {
6657                 enum ieee80211_band band = nla_type(tx_rates);
6658                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6659                         return -EINVAL;
6660                 sband = rdev->wiphy.bands[band];
6661                 if (sband == NULL)
6662                         return -EINVAL;
6663                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6664                           nla_len(tx_rates), nl80211_txattr_policy);
6665                 if (tb[NL80211_TXRATE_LEGACY]) {
6666                         mask.control[band].legacy = rateset_to_mask(
6667                                 sband,
6668                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6669                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6670                         if ((mask.control[band].legacy == 0) &&
6671                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6672                                 return -EINVAL;
6673                 }
6674                 if (tb[NL80211_TXRATE_MCS]) {
6675                         if (!ht_rateset_to_mask(
6676                                         sband,
6677                                         nla_data(tb[NL80211_TXRATE_MCS]),
6678                                         nla_len(tb[NL80211_TXRATE_MCS]),
6679                                         mask.control[band].mcs))
6680                                 return -EINVAL;
6681                 }
6682
6683                 if (mask.control[band].legacy == 0) {
6684                         /* don't allow empty legacy rates if HT
6685                          * is not even supported. */
6686                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6687                                 return -EINVAL;
6688
6689                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6690                                 if (mask.control[band].mcs[i])
6691                                         break;
6692
6693                         /* legacy and mcs rates may not be both empty */
6694                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6695                                 return -EINVAL;
6696                 }
6697         }
6698
6699         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6700 }
6701
6702 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6703 {
6704         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6705         struct wireless_dev *wdev = info->user_ptr[1];
6706         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6707
6708         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6709                 return -EINVAL;
6710
6711         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6712                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6713
6714         switch (wdev->iftype) {
6715         case NL80211_IFTYPE_STATION:
6716         case NL80211_IFTYPE_ADHOC:
6717         case NL80211_IFTYPE_P2P_CLIENT:
6718         case NL80211_IFTYPE_AP:
6719         case NL80211_IFTYPE_AP_VLAN:
6720         case NL80211_IFTYPE_MESH_POINT:
6721         case NL80211_IFTYPE_P2P_GO:
6722         case NL80211_IFTYPE_P2P_DEVICE:
6723                 break;
6724         default:
6725                 return -EOPNOTSUPP;
6726         }
6727
6728         /* not much point in registering if we can't reply */
6729         if (!rdev->ops->mgmt_tx)
6730                 return -EOPNOTSUPP;
6731
6732         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6733                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6734                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6735 }
6736
6737 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6738 {
6739         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6740         struct wireless_dev *wdev = info->user_ptr[1];
6741         struct cfg80211_chan_def chandef;
6742         int err;
6743         void *hdr = NULL;
6744         u64 cookie;
6745         struct sk_buff *msg = NULL;
6746         unsigned int wait = 0;
6747         bool offchan, no_cck, dont_wait_for_ack;
6748
6749         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6750
6751         if (!info->attrs[NL80211_ATTR_FRAME])
6752                 return -EINVAL;
6753
6754         if (!rdev->ops->mgmt_tx)
6755                 return -EOPNOTSUPP;
6756
6757         switch (wdev->iftype) {
6758         case NL80211_IFTYPE_STATION:
6759         case NL80211_IFTYPE_ADHOC:
6760         case NL80211_IFTYPE_P2P_CLIENT:
6761         case NL80211_IFTYPE_AP:
6762         case NL80211_IFTYPE_AP_VLAN:
6763         case NL80211_IFTYPE_MESH_POINT:
6764         case NL80211_IFTYPE_P2P_GO:
6765         case NL80211_IFTYPE_P2P_DEVICE:
6766                 break;
6767         default:
6768                 return -EOPNOTSUPP;
6769         }
6770
6771         if (info->attrs[NL80211_ATTR_DURATION]) {
6772                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6773                         return -EINVAL;
6774                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6775
6776                 /*
6777                  * We should wait on the channel for at least a minimum amount
6778                  * of time (10ms) but no longer than the driver supports.
6779                  */
6780                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6781                     wait > rdev->wiphy.max_remain_on_channel_duration)
6782                         return -EINVAL;
6783
6784         }
6785
6786         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6787
6788         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6789                 return -EINVAL;
6790
6791         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6792
6793         err = nl80211_parse_chandef(rdev, info, &chandef);
6794         if (err)
6795                 return err;
6796
6797         if (!dont_wait_for_ack) {
6798                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6799                 if (!msg)
6800                         return -ENOMEM;
6801
6802                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6803                                      NL80211_CMD_FRAME);
6804
6805                 if (IS_ERR(hdr)) {
6806                         err = PTR_ERR(hdr);
6807                         goto free_msg;
6808                 }
6809         }
6810
6811         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6812                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6813                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6814                                     no_cck, dont_wait_for_ack, &cookie);
6815         if (err)
6816                 goto free_msg;
6817
6818         if (msg) {
6819                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6820                         goto nla_put_failure;
6821
6822                 genlmsg_end(msg, hdr);
6823                 return genlmsg_reply(msg, info);
6824         }
6825
6826         return 0;
6827
6828  nla_put_failure:
6829         err = -ENOBUFS;
6830  free_msg:
6831         nlmsg_free(msg);
6832         return err;
6833 }
6834
6835 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6836 {
6837         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6838         struct wireless_dev *wdev = info->user_ptr[1];
6839         u64 cookie;
6840
6841         if (!info->attrs[NL80211_ATTR_COOKIE])
6842                 return -EINVAL;
6843
6844         if (!rdev->ops->mgmt_tx_cancel_wait)
6845                 return -EOPNOTSUPP;
6846
6847         switch (wdev->iftype) {
6848         case NL80211_IFTYPE_STATION:
6849         case NL80211_IFTYPE_ADHOC:
6850         case NL80211_IFTYPE_P2P_CLIENT:
6851         case NL80211_IFTYPE_AP:
6852         case NL80211_IFTYPE_AP_VLAN:
6853         case NL80211_IFTYPE_P2P_GO:
6854         case NL80211_IFTYPE_P2P_DEVICE:
6855                 break;
6856         default:
6857                 return -EOPNOTSUPP;
6858         }
6859
6860         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6861
6862         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6863 }
6864
6865 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6866 {
6867         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6868         struct wireless_dev *wdev;
6869         struct net_device *dev = info->user_ptr[1];
6870         u8 ps_state;
6871         bool state;
6872         int err;
6873
6874         if (!info->attrs[NL80211_ATTR_PS_STATE])
6875                 return -EINVAL;
6876
6877         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6878
6879         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6880                 return -EINVAL;
6881
6882         wdev = dev->ieee80211_ptr;
6883
6884         if (!rdev->ops->set_power_mgmt)
6885                 return -EOPNOTSUPP;
6886
6887         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6888
6889         if (state == wdev->ps)
6890                 return 0;
6891
6892         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6893         if (!err)
6894                 wdev->ps = state;
6895         return err;
6896 }
6897
6898 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6899 {
6900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6901         enum nl80211_ps_state ps_state;
6902         struct wireless_dev *wdev;
6903         struct net_device *dev = info->user_ptr[1];
6904         struct sk_buff *msg;
6905         void *hdr;
6906         int err;
6907
6908         wdev = dev->ieee80211_ptr;
6909
6910         if (!rdev->ops->set_power_mgmt)
6911                 return -EOPNOTSUPP;
6912
6913         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6914         if (!msg)
6915                 return -ENOMEM;
6916
6917         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6918                              NL80211_CMD_GET_POWER_SAVE);
6919         if (!hdr) {
6920                 err = -ENOBUFS;
6921                 goto free_msg;
6922         }
6923
6924         if (wdev->ps)
6925                 ps_state = NL80211_PS_ENABLED;
6926         else
6927                 ps_state = NL80211_PS_DISABLED;
6928
6929         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6930                 goto nla_put_failure;
6931
6932         genlmsg_end(msg, hdr);
6933         return genlmsg_reply(msg, info);
6934
6935  nla_put_failure:
6936         err = -ENOBUFS;
6937  free_msg:
6938         nlmsg_free(msg);
6939         return err;
6940 }
6941
6942 static struct nla_policy
6943 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6944         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6945         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6946         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6947         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6948         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6949         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6950 };
6951
6952 static int nl80211_set_cqm_txe(struct genl_info *info,
6953                                u32 rate, u32 pkts, u32 intvl)
6954 {
6955         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6956         struct wireless_dev *wdev;
6957         struct net_device *dev = info->user_ptr[1];
6958
6959         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6960                 return -EINVAL;
6961
6962         wdev = dev->ieee80211_ptr;
6963
6964         if (!rdev->ops->set_cqm_txe_config)
6965                 return -EOPNOTSUPP;
6966
6967         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6968             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6969                 return -EOPNOTSUPP;
6970
6971         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6972 }
6973
6974 static int nl80211_set_cqm_rssi(struct genl_info *info,
6975                                 s32 threshold, u32 hysteresis)
6976 {
6977         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6978         struct wireless_dev *wdev;
6979         struct net_device *dev = info->user_ptr[1];
6980
6981         if (threshold > 0)
6982                 return -EINVAL;
6983
6984         wdev = dev->ieee80211_ptr;
6985
6986         if (!rdev->ops->set_cqm_rssi_config)
6987                 return -EOPNOTSUPP;
6988
6989         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6990             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6991                 return -EOPNOTSUPP;
6992
6993         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6994 }
6995
6996 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6997 {
6998         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6999         struct nlattr *cqm;
7000         int err;
7001
7002         cqm = info->attrs[NL80211_ATTR_CQM];
7003         if (!cqm) {
7004                 err = -EINVAL;
7005                 goto out;
7006         }
7007
7008         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
7009                                nl80211_attr_cqm_policy);
7010         if (err)
7011                 goto out;
7012
7013         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
7014             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
7015                 s32 threshold;
7016                 u32 hysteresis;
7017                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
7018                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
7019                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
7020         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
7021                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
7022                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
7023                 u32 rate, pkts, intvl;
7024                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
7025                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
7026                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
7027                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
7028         } else
7029                 err = -EINVAL;
7030
7031 out:
7032         return err;
7033 }
7034
7035 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
7036 {
7037         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7038         struct net_device *dev = info->user_ptr[1];
7039         struct mesh_config cfg;
7040         struct mesh_setup setup;
7041         int err;
7042
7043         /* start with default */
7044         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
7045         memcpy(&setup, &default_mesh_setup, sizeof(setup));
7046
7047         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
7048                 /* and parse parameters if given */
7049                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
7050                 if (err)
7051                         return err;
7052         }
7053
7054         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
7055             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
7056                 return -EINVAL;
7057
7058         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
7059         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
7060
7061         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
7062             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
7063                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
7064                         return -EINVAL;
7065
7066         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
7067                 setup.beacon_interval =
7068                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
7069                 if (setup.beacon_interval < 10 ||
7070                     setup.beacon_interval > 10000)
7071                         return -EINVAL;
7072         }
7073
7074         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
7075                 setup.dtim_period =
7076                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
7077                 if (setup.dtim_period < 1 || setup.dtim_period > 100)
7078                         return -EINVAL;
7079         }
7080
7081         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
7082                 /* parse additional setup parameters if given */
7083                 err = nl80211_parse_mesh_setup(info, &setup);
7084                 if (err)
7085                         return err;
7086         }
7087
7088         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
7089                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
7090                 if (err)
7091                         return err;
7092         } else {
7093                 /* cfg80211_join_mesh() will sort it out */
7094                 setup.chandef.chan = NULL;
7095         }
7096
7097         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
7098 }
7099
7100 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
7101 {
7102         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7103         struct net_device *dev = info->user_ptr[1];
7104
7105         return cfg80211_leave_mesh(rdev, dev);
7106 }
7107
7108 #ifdef CONFIG_PM
7109 static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
7110                                         struct cfg80211_registered_device *rdev)
7111 {
7112         struct nlattr *nl_pats, *nl_pat;
7113         int i, pat_len;
7114
7115         if (!rdev->wowlan->n_patterns)
7116                 return 0;
7117
7118         nl_pats = nla_nest_start(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
7119         if (!nl_pats)
7120                 return -ENOBUFS;
7121
7122         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
7123                 nl_pat = nla_nest_start(msg, i + 1);
7124                 if (!nl_pat)
7125                         return -ENOBUFS;
7126                 pat_len = rdev->wowlan->patterns[i].pattern_len;
7127                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
7128                             DIV_ROUND_UP(pat_len, 8),
7129                             rdev->wowlan->patterns[i].mask) ||
7130                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
7131                             pat_len, rdev->wowlan->patterns[i].pattern) ||
7132                     nla_put_u32(msg, NL80211_WOWLAN_PKTPAT_OFFSET,
7133                                 rdev->wowlan->patterns[i].pkt_offset))
7134                         return -ENOBUFS;
7135                 nla_nest_end(msg, nl_pat);
7136         }
7137         nla_nest_end(msg, nl_pats);
7138
7139         return 0;
7140 }
7141
7142 static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
7143                                    struct cfg80211_wowlan_tcp *tcp)
7144 {
7145         struct nlattr *nl_tcp;
7146
7147         if (!tcp)
7148                 return 0;
7149
7150         nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
7151         if (!nl_tcp)
7152                 return -ENOBUFS;
7153
7154         if (nla_put_be32(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
7155             nla_put_be32(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
7156             nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
7157             nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
7158             nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
7159             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
7160                     tcp->payload_len, tcp->payload) ||
7161             nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
7162                         tcp->data_interval) ||
7163             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
7164                     tcp->wake_len, tcp->wake_data) ||
7165             nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
7166                     DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
7167                 return -ENOBUFS;
7168
7169         if (tcp->payload_seq.len &&
7170             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
7171                     sizeof(tcp->payload_seq), &tcp->payload_seq))
7172                 return -ENOBUFS;
7173
7174         if (tcp->payload_tok.len &&
7175             nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
7176                     sizeof(tcp->payload_tok) + tcp->tokens_size,
7177                     &tcp->payload_tok))
7178                 return -ENOBUFS;
7179
7180         return 0;
7181 }
7182
7183 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
7184 {
7185         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7186         struct sk_buff *msg;
7187         void *hdr;
7188         u32 size = NLMSG_DEFAULT_SIZE;
7189
7190         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7191             !rdev->wiphy.wowlan.tcp)
7192                 return -EOPNOTSUPP;
7193
7194         if (rdev->wowlan && rdev->wowlan->tcp) {
7195                 /* adjust size to have room for all the data */
7196                 size += rdev->wowlan->tcp->tokens_size +
7197                         rdev->wowlan->tcp->payload_len +
7198                         rdev->wowlan->tcp->wake_len +
7199                         rdev->wowlan->tcp->wake_len / 8;
7200         }
7201
7202         msg = nlmsg_new(size, GFP_KERNEL);
7203         if (!msg)
7204                 return -ENOMEM;
7205
7206         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7207                              NL80211_CMD_GET_WOWLAN);
7208         if (!hdr)
7209                 goto nla_put_failure;
7210
7211         if (rdev->wowlan) {
7212                 struct nlattr *nl_wowlan;
7213
7214                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
7215                 if (!nl_wowlan)
7216                         goto nla_put_failure;
7217
7218                 if ((rdev->wowlan->any &&
7219                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
7220                     (rdev->wowlan->disconnect &&
7221                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
7222                     (rdev->wowlan->magic_pkt &&
7223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
7224                     (rdev->wowlan->gtk_rekey_failure &&
7225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
7226                     (rdev->wowlan->eap_identity_req &&
7227                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
7228                     (rdev->wowlan->four_way_handshake &&
7229                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
7230                     (rdev->wowlan->rfkill_release &&
7231                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
7232                         goto nla_put_failure;
7233
7234                 if (nl80211_send_wowlan_patterns(msg, rdev))
7235                         goto nla_put_failure;
7236
7237                 if (nl80211_send_wowlan_tcp(msg, rdev->wowlan->tcp))
7238                         goto nla_put_failure;
7239
7240                 nla_nest_end(msg, nl_wowlan);
7241         }
7242
7243         genlmsg_end(msg, hdr);
7244         return genlmsg_reply(msg, info);
7245
7246 nla_put_failure:
7247         nlmsg_free(msg);
7248         return -ENOBUFS;
7249 }
7250
7251 static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
7252                                     struct nlattr *attr,
7253                                     struct cfg80211_wowlan *trig)
7254 {
7255         struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
7256         struct cfg80211_wowlan_tcp *cfg;
7257         struct nl80211_wowlan_tcp_data_token *tok = NULL;
7258         struct nl80211_wowlan_tcp_data_seq *seq = NULL;
7259         u32 size;
7260         u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
7261         int err, port;
7262
7263         if (!rdev->wiphy.wowlan.tcp)
7264                 return -EINVAL;
7265
7266         err = nla_parse(tb, MAX_NL80211_WOWLAN_TCP,
7267                         nla_data(attr), nla_len(attr),
7268                         nl80211_wowlan_tcp_policy);
7269         if (err)
7270                 return err;
7271
7272         if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
7273             !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
7274             !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
7275             !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
7276             !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
7277             !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
7278             !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
7279             !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
7280                 return -EINVAL;
7281
7282         data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
7283         if (data_size > rdev->wiphy.wowlan.tcp->data_payload_max)
7284                 return -EINVAL;
7285
7286         if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
7287                         rdev->wiphy.wowlan.tcp->data_interval_max)
7288                 return -EINVAL;
7289
7290         wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
7291         if (wake_size > rdev->wiphy.wowlan.tcp->wake_payload_max)
7292                 return -EINVAL;
7293
7294         wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
7295         if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
7296                 return -EINVAL;
7297
7298         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
7299                 u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7300
7301                 tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
7302                 tokens_size = tokln - sizeof(*tok);
7303
7304                 if (!tok->len || tokens_size % tok->len)
7305                         return -EINVAL;
7306                 if (!rdev->wiphy.wowlan.tcp->tok)
7307                         return -EINVAL;
7308                 if (tok->len > rdev->wiphy.wowlan.tcp->tok->max_len)
7309                         return -EINVAL;
7310                 if (tok->len < rdev->wiphy.wowlan.tcp->tok->min_len)
7311                         return -EINVAL;
7312                 if (tokens_size > rdev->wiphy.wowlan.tcp->tok->bufsize)
7313                         return -EINVAL;
7314                 if (tok->offset + tok->len > data_size)
7315                         return -EINVAL;
7316         }
7317
7318         if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
7319                 seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
7320                 if (!rdev->wiphy.wowlan.tcp->seq)
7321                         return -EINVAL;
7322                 if (seq->len == 0 || seq->len > 4)
7323                         return -EINVAL;
7324                 if (seq->len + seq->offset > data_size)
7325                         return -EINVAL;
7326         }
7327
7328         size = sizeof(*cfg);
7329         size += data_size;
7330         size += wake_size + wake_mask_size;
7331         size += tokens_size;
7332
7333         cfg = kzalloc(size, GFP_KERNEL);
7334         if (!cfg)
7335                 return -ENOMEM;
7336         cfg->src = nla_get_be32(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
7337         cfg->dst = nla_get_be32(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
7338         memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
7339                ETH_ALEN);
7340         if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
7341                 port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
7342         else
7343                 port = 0;
7344 #ifdef CONFIG_INET
7345         /* allocate a socket and port for it and use it */
7346         err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
7347                             IPPROTO_TCP, &cfg->sock, 1);
7348         if (err) {
7349                 kfree(cfg);
7350                 return err;
7351         }
7352         if (inet_csk_get_port(cfg->sock->sk, port)) {
7353                 sock_release(cfg->sock);
7354                 kfree(cfg);
7355                 return -EADDRINUSE;
7356         }
7357         cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
7358 #else
7359         if (!port) {
7360                 kfree(cfg);
7361                 return -EINVAL;
7362         }
7363         cfg->src_port = port;
7364 #endif
7365
7366         cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
7367         cfg->payload_len = data_size;
7368         cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
7369         memcpy((void *)cfg->payload,
7370                nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
7371                data_size);
7372         if (seq)
7373                 cfg->payload_seq = *seq;
7374         cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
7375         cfg->wake_len = wake_size;
7376         cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
7377         memcpy((void *)cfg->wake_data,
7378                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
7379                wake_size);
7380         cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
7381                          data_size + wake_size;
7382         memcpy((void *)cfg->wake_mask,
7383                nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
7384                wake_mask_size);
7385         if (tok) {
7386                 cfg->tokens_size = tokens_size;
7387                 memcpy(&cfg->payload_tok, tok, sizeof(*tok) + tokens_size);
7388         }
7389
7390         trig->tcp = cfg;
7391
7392         return 0;
7393 }
7394
7395 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
7396 {
7397         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7398         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
7399         struct cfg80211_wowlan new_triggers = {};
7400         struct cfg80211_wowlan *ntrig;
7401         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
7402         int err, i;
7403         bool prev_enabled = rdev->wowlan;
7404
7405         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns &&
7406             !rdev->wiphy.wowlan.tcp)
7407                 return -EOPNOTSUPP;
7408
7409         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
7410                 cfg80211_rdev_free_wowlan(rdev);
7411                 rdev->wowlan = NULL;
7412                 goto set_wakeup;
7413         }
7414
7415         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
7416                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7417                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
7418                         nl80211_wowlan_policy);
7419         if (err)
7420                 return err;
7421
7422         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
7423                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
7424                         return -EINVAL;
7425                 new_triggers.any = true;
7426         }
7427
7428         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
7429                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
7430                         return -EINVAL;
7431                 new_triggers.disconnect = true;
7432         }
7433
7434         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
7435                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
7436                         return -EINVAL;
7437                 new_triggers.magic_pkt = true;
7438         }
7439
7440         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
7441                 return -EINVAL;
7442
7443         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
7444                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
7445                         return -EINVAL;
7446                 new_triggers.gtk_rekey_failure = true;
7447         }
7448
7449         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
7450                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
7451                         return -EINVAL;
7452                 new_triggers.eap_identity_req = true;
7453         }
7454
7455         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
7456                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
7457                         return -EINVAL;
7458                 new_triggers.four_way_handshake = true;
7459         }
7460
7461         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
7462                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
7463                         return -EINVAL;
7464                 new_triggers.rfkill_release = true;
7465         }
7466
7467         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
7468                 struct nlattr *pat;
7469                 int n_patterns = 0;
7470                 int rem, pat_len, mask_len, pkt_offset;
7471                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
7472
7473                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7474                                     rem)
7475                         n_patterns++;
7476                 if (n_patterns > wowlan->n_patterns)
7477                         return -EINVAL;
7478
7479                 new_triggers.patterns = kcalloc(n_patterns,
7480                                                 sizeof(new_triggers.patterns[0]),
7481                                                 GFP_KERNEL);
7482                 if (!new_triggers.patterns)
7483                         return -ENOMEM;
7484
7485                 new_triggers.n_patterns = n_patterns;
7486                 i = 0;
7487
7488                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
7489                                     rem) {
7490                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
7491                                   nla_data(pat), nla_len(pat), NULL);
7492                         err = -EINVAL;
7493                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
7494                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
7495                                 goto error;
7496                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
7497                         mask_len = DIV_ROUND_UP(pat_len, 8);
7498                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
7499                             mask_len)
7500                                 goto error;
7501                         if (pat_len > wowlan->pattern_max_len ||
7502                             pat_len < wowlan->pattern_min_len)
7503                                 goto error;
7504
7505                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET])
7506                                 pkt_offset = 0;
7507                         else
7508                                 pkt_offset = nla_get_u32(
7509                                         pat_tb[NL80211_WOWLAN_PKTPAT_OFFSET]);
7510                         if (pkt_offset > wowlan->max_pkt_offset)
7511                                 goto error;
7512                         new_triggers.patterns[i].pkt_offset = pkt_offset;
7513
7514                         new_triggers.patterns[i].mask =
7515                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
7516                         if (!new_triggers.patterns[i].mask) {
7517                                 err = -ENOMEM;
7518                                 goto error;
7519                         }
7520                         new_triggers.patterns[i].pattern =
7521                                 new_triggers.patterns[i].mask + mask_len;
7522                         memcpy(new_triggers.patterns[i].mask,
7523                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
7524                                mask_len);
7525                         new_triggers.patterns[i].pattern_len = pat_len;
7526                         memcpy(new_triggers.patterns[i].pattern,
7527                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
7528                                pat_len);
7529                         i++;
7530                 }
7531         }
7532
7533         if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
7534                 err = nl80211_parse_wowlan_tcp(
7535                         rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
7536                         &new_triggers);
7537                 if (err)
7538                         goto error;
7539         }
7540
7541         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
7542         if (!ntrig) {
7543                 err = -ENOMEM;
7544                 goto error;
7545         }
7546         cfg80211_rdev_free_wowlan(rdev);
7547         rdev->wowlan = ntrig;
7548
7549  set_wakeup:
7550         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
7551                 rdev_set_wakeup(rdev, rdev->wowlan);
7552
7553         return 0;
7554  error:
7555         for (i = 0; i < new_triggers.n_patterns; i++)
7556                 kfree(new_triggers.patterns[i].mask);
7557         kfree(new_triggers.patterns);
7558         if (new_triggers.tcp && new_triggers.tcp->sock)
7559                 sock_release(new_triggers.tcp->sock);
7560         kfree(new_triggers.tcp);
7561         return err;
7562 }
7563 #endif
7564
7565 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
7566 {
7567         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7568         struct net_device *dev = info->user_ptr[1];
7569         struct wireless_dev *wdev = dev->ieee80211_ptr;
7570         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
7571         struct cfg80211_gtk_rekey_data rekey_data;
7572         int err;
7573
7574         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
7575                 return -EINVAL;
7576
7577         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
7578                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
7579                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
7580                         nl80211_rekey_policy);
7581         if (err)
7582                 return err;
7583
7584         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
7585                 return -ERANGE;
7586         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
7587                 return -ERANGE;
7588         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
7589                 return -ERANGE;
7590
7591         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
7592                NL80211_KEK_LEN);
7593         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
7594                NL80211_KCK_LEN);
7595         memcpy(rekey_data.replay_ctr,
7596                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
7597                NL80211_REPLAY_CTR_LEN);
7598
7599         wdev_lock(wdev);
7600         if (!wdev->current_bss) {
7601                 err = -ENOTCONN;
7602                 goto out;
7603         }
7604
7605         if (!rdev->ops->set_rekey_data) {
7606                 err = -EOPNOTSUPP;
7607                 goto out;
7608         }
7609
7610         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
7611  out:
7612         wdev_unlock(wdev);
7613         return err;
7614 }
7615
7616 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
7617                                              struct genl_info *info)
7618 {
7619         struct net_device *dev = info->user_ptr[1];
7620         struct wireless_dev *wdev = dev->ieee80211_ptr;
7621
7622         if (wdev->iftype != NL80211_IFTYPE_AP &&
7623             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7624                 return -EINVAL;
7625
7626         if (wdev->ap_unexpected_nlportid)
7627                 return -EBUSY;
7628
7629         wdev->ap_unexpected_nlportid = info->snd_portid;
7630         return 0;
7631 }
7632
7633 static int nl80211_probe_client(struct sk_buff *skb,
7634                                 struct genl_info *info)
7635 {
7636         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7637         struct net_device *dev = info->user_ptr[1];
7638         struct wireless_dev *wdev = dev->ieee80211_ptr;
7639         struct sk_buff *msg;
7640         void *hdr;
7641         const u8 *addr;
7642         u64 cookie;
7643         int err;
7644
7645         if (wdev->iftype != NL80211_IFTYPE_AP &&
7646             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7647                 return -EOPNOTSUPP;
7648
7649         if (!info->attrs[NL80211_ATTR_MAC])
7650                 return -EINVAL;
7651
7652         if (!rdev->ops->probe_client)
7653                 return -EOPNOTSUPP;
7654
7655         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7656         if (!msg)
7657                 return -ENOMEM;
7658
7659         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7660                              NL80211_CMD_PROBE_CLIENT);
7661
7662         if (IS_ERR(hdr)) {
7663                 err = PTR_ERR(hdr);
7664                 goto free_msg;
7665         }
7666
7667         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7668
7669         err = rdev_probe_client(rdev, dev, addr, &cookie);
7670         if (err)
7671                 goto free_msg;
7672
7673         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7674                 goto nla_put_failure;
7675
7676         genlmsg_end(msg, hdr);
7677
7678         return genlmsg_reply(msg, info);
7679
7680  nla_put_failure:
7681         err = -ENOBUFS;
7682  free_msg:
7683         nlmsg_free(msg);
7684         return err;
7685 }
7686
7687 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7688 {
7689         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7690         struct cfg80211_beacon_registration *reg, *nreg;
7691         int rv;
7692
7693         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7694                 return -EOPNOTSUPP;
7695
7696         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7697         if (!nreg)
7698                 return -ENOMEM;
7699
7700         /* First, check if already registered. */
7701         spin_lock_bh(&rdev->beacon_registrations_lock);
7702         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7703                 if (reg->nlportid == info->snd_portid) {
7704                         rv = -EALREADY;
7705                         goto out_err;
7706                 }
7707         }
7708         /* Add it to the list */
7709         nreg->nlportid = info->snd_portid;
7710         list_add(&nreg->list, &rdev->beacon_registrations);
7711
7712         spin_unlock_bh(&rdev->beacon_registrations_lock);
7713
7714         return 0;
7715 out_err:
7716         spin_unlock_bh(&rdev->beacon_registrations_lock);
7717         kfree(nreg);
7718         return rv;
7719 }
7720
7721 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7722 {
7723         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7724         struct wireless_dev *wdev = info->user_ptr[1];
7725         int err;
7726
7727         if (!rdev->ops->start_p2p_device)
7728                 return -EOPNOTSUPP;
7729
7730         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7731                 return -EOPNOTSUPP;
7732
7733         if (wdev->p2p_started)
7734                 return 0;
7735
7736         mutex_lock(&rdev->devlist_mtx);
7737         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7738         mutex_unlock(&rdev->devlist_mtx);
7739         if (err)
7740                 return err;
7741
7742         err = rdev_start_p2p_device(rdev, wdev);
7743         if (err)
7744                 return err;
7745
7746         wdev->p2p_started = true;
7747         mutex_lock(&rdev->devlist_mtx);
7748         rdev->opencount++;
7749         mutex_unlock(&rdev->devlist_mtx);
7750
7751         return 0;
7752 }
7753
7754 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7755 {
7756         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7757         struct wireless_dev *wdev = info->user_ptr[1];
7758
7759         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7760                 return -EOPNOTSUPP;
7761
7762         if (!rdev->ops->stop_p2p_device)
7763                 return -EOPNOTSUPP;
7764
7765         mutex_lock(&rdev->sched_scan_mtx);
7766         cfg80211_stop_p2p_device(rdev, wdev);
7767         mutex_unlock(&rdev->sched_scan_mtx);
7768
7769         return 0;
7770 }
7771
7772 #define NL80211_FLAG_NEED_WIPHY         0x01
7773 #define NL80211_FLAG_NEED_NETDEV        0x02
7774 #define NL80211_FLAG_NEED_RTNL          0x04
7775 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7776 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7777                                          NL80211_FLAG_CHECK_NETDEV_UP)
7778 #define NL80211_FLAG_NEED_WDEV          0x10
7779 /* If a netdev is associated, it must be UP, P2P must be started */
7780 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7781                                          NL80211_FLAG_CHECK_NETDEV_UP)
7782
7783 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7784                             struct genl_info *info)
7785 {
7786         struct cfg80211_registered_device *rdev;
7787         struct wireless_dev *wdev;
7788         struct net_device *dev;
7789         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7790
7791         if (rtnl)
7792                 rtnl_lock();
7793
7794         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7795                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7796                 if (IS_ERR(rdev)) {
7797                         if (rtnl)
7798                                 rtnl_unlock();
7799                         return PTR_ERR(rdev);
7800                 }
7801                 info->user_ptr[0] = rdev;
7802         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7803                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7804                 mutex_lock(&cfg80211_mutex);
7805                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7806                                                   info->attrs);
7807                 if (IS_ERR(wdev)) {
7808                         mutex_unlock(&cfg80211_mutex);
7809                         if (rtnl)
7810                                 rtnl_unlock();
7811                         return PTR_ERR(wdev);
7812                 }
7813
7814                 dev = wdev->netdev;
7815                 rdev = wiphy_to_dev(wdev->wiphy);
7816
7817                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7818                         if (!dev) {
7819                                 mutex_unlock(&cfg80211_mutex);
7820                                 if (rtnl)
7821                                         rtnl_unlock();
7822                                 return -EINVAL;
7823                         }
7824
7825                         info->user_ptr[1] = dev;
7826                 } else {
7827                         info->user_ptr[1] = wdev;
7828                 }
7829
7830                 if (dev) {
7831                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7832                             !netif_running(dev)) {
7833                                 mutex_unlock(&cfg80211_mutex);
7834                                 if (rtnl)
7835                                         rtnl_unlock();
7836                                 return -ENETDOWN;
7837                         }
7838
7839                         dev_hold(dev);
7840                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7841                         if (!wdev->p2p_started) {
7842                                 mutex_unlock(&cfg80211_mutex);
7843                                 if (rtnl)
7844                                         rtnl_unlock();
7845                                 return -ENETDOWN;
7846                         }
7847                 }
7848
7849                 cfg80211_lock_rdev(rdev);
7850
7851                 mutex_unlock(&cfg80211_mutex);
7852
7853                 info->user_ptr[0] = rdev;
7854         }
7855
7856         return 0;
7857 }
7858
7859 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7860                               struct genl_info *info)
7861 {
7862         if (info->user_ptr[0])
7863                 cfg80211_unlock_rdev(info->user_ptr[0]);
7864         if (info->user_ptr[1]) {
7865                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7866                         struct wireless_dev *wdev = info->user_ptr[1];
7867
7868                         if (wdev->netdev)
7869                                 dev_put(wdev->netdev);
7870                 } else {
7871                         dev_put(info->user_ptr[1]);
7872                 }
7873         }
7874         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7875                 rtnl_unlock();
7876 }
7877
7878 static struct genl_ops nl80211_ops[] = {
7879         {
7880                 .cmd = NL80211_CMD_GET_WIPHY,
7881                 .doit = nl80211_get_wiphy,
7882                 .dumpit = nl80211_dump_wiphy,
7883                 .policy = nl80211_policy,
7884                 /* can be retrieved by unprivileged users */
7885                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7886         },
7887         {
7888                 .cmd = NL80211_CMD_SET_WIPHY,
7889                 .doit = nl80211_set_wiphy,
7890                 .policy = nl80211_policy,
7891                 .flags = GENL_ADMIN_PERM,
7892                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7893         },
7894         {
7895                 .cmd = NL80211_CMD_GET_INTERFACE,
7896                 .doit = nl80211_get_interface,
7897                 .dumpit = nl80211_dump_interface,
7898                 .policy = nl80211_policy,
7899                 /* can be retrieved by unprivileged users */
7900                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7901         },
7902         {
7903                 .cmd = NL80211_CMD_SET_INTERFACE,
7904                 .doit = nl80211_set_interface,
7905                 .policy = nl80211_policy,
7906                 .flags = GENL_ADMIN_PERM,
7907                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7908                                   NL80211_FLAG_NEED_RTNL,
7909         },
7910         {
7911                 .cmd = NL80211_CMD_NEW_INTERFACE,
7912                 .doit = nl80211_new_interface,
7913                 .policy = nl80211_policy,
7914                 .flags = GENL_ADMIN_PERM,
7915                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7916                                   NL80211_FLAG_NEED_RTNL,
7917         },
7918         {
7919                 .cmd = NL80211_CMD_DEL_INTERFACE,
7920                 .doit = nl80211_del_interface,
7921                 .policy = nl80211_policy,
7922                 .flags = GENL_ADMIN_PERM,
7923                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7924                                   NL80211_FLAG_NEED_RTNL,
7925         },
7926         {
7927                 .cmd = NL80211_CMD_GET_KEY,
7928                 .doit = nl80211_get_key,
7929                 .policy = nl80211_policy,
7930                 .flags = GENL_ADMIN_PERM,
7931                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7932                                   NL80211_FLAG_NEED_RTNL,
7933         },
7934         {
7935                 .cmd = NL80211_CMD_SET_KEY,
7936                 .doit = nl80211_set_key,
7937                 .policy = nl80211_policy,
7938                 .flags = GENL_ADMIN_PERM,
7939                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7940                                   NL80211_FLAG_NEED_RTNL,
7941         },
7942         {
7943                 .cmd = NL80211_CMD_NEW_KEY,
7944                 .doit = nl80211_new_key,
7945                 .policy = nl80211_policy,
7946                 .flags = GENL_ADMIN_PERM,
7947                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7948                                   NL80211_FLAG_NEED_RTNL,
7949         },
7950         {
7951                 .cmd = NL80211_CMD_DEL_KEY,
7952                 .doit = nl80211_del_key,
7953                 .policy = nl80211_policy,
7954                 .flags = GENL_ADMIN_PERM,
7955                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7956                                   NL80211_FLAG_NEED_RTNL,
7957         },
7958         {
7959                 .cmd = NL80211_CMD_SET_BEACON,
7960                 .policy = nl80211_policy,
7961                 .flags = GENL_ADMIN_PERM,
7962                 .doit = nl80211_set_beacon,
7963                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7964                                   NL80211_FLAG_NEED_RTNL,
7965         },
7966         {
7967                 .cmd = NL80211_CMD_START_AP,
7968                 .policy = nl80211_policy,
7969                 .flags = GENL_ADMIN_PERM,
7970                 .doit = nl80211_start_ap,
7971                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7972                                   NL80211_FLAG_NEED_RTNL,
7973         },
7974         {
7975                 .cmd = NL80211_CMD_STOP_AP,
7976                 .policy = nl80211_policy,
7977                 .flags = GENL_ADMIN_PERM,
7978                 .doit = nl80211_stop_ap,
7979                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7980                                   NL80211_FLAG_NEED_RTNL,
7981         },
7982         {
7983                 .cmd = NL80211_CMD_GET_STATION,
7984                 .doit = nl80211_get_station,
7985                 .dumpit = nl80211_dump_station,
7986                 .policy = nl80211_policy,
7987                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7988                                   NL80211_FLAG_NEED_RTNL,
7989         },
7990         {
7991                 .cmd = NL80211_CMD_SET_STATION,
7992                 .doit = nl80211_set_station,
7993                 .policy = nl80211_policy,
7994                 .flags = GENL_ADMIN_PERM,
7995                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7996                                   NL80211_FLAG_NEED_RTNL,
7997         },
7998         {
7999                 .cmd = NL80211_CMD_NEW_STATION,
8000                 .doit = nl80211_new_station,
8001                 .policy = nl80211_policy,
8002                 .flags = GENL_ADMIN_PERM,
8003                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8004                                   NL80211_FLAG_NEED_RTNL,
8005         },
8006         {
8007                 .cmd = NL80211_CMD_DEL_STATION,
8008                 .doit = nl80211_del_station,
8009                 .policy = nl80211_policy,
8010                 .flags = GENL_ADMIN_PERM,
8011                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8012                                   NL80211_FLAG_NEED_RTNL,
8013         },
8014         {
8015                 .cmd = NL80211_CMD_GET_MPATH,
8016                 .doit = nl80211_get_mpath,
8017                 .dumpit = nl80211_dump_mpath,
8018                 .policy = nl80211_policy,
8019                 .flags = GENL_ADMIN_PERM,
8020                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8021                                   NL80211_FLAG_NEED_RTNL,
8022         },
8023         {
8024                 .cmd = NL80211_CMD_SET_MPATH,
8025                 .doit = nl80211_set_mpath,
8026                 .policy = nl80211_policy,
8027                 .flags = GENL_ADMIN_PERM,
8028                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8029                                   NL80211_FLAG_NEED_RTNL,
8030         },
8031         {
8032                 .cmd = NL80211_CMD_NEW_MPATH,
8033                 .doit = nl80211_new_mpath,
8034                 .policy = nl80211_policy,
8035                 .flags = GENL_ADMIN_PERM,
8036                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8037                                   NL80211_FLAG_NEED_RTNL,
8038         },
8039         {
8040                 .cmd = NL80211_CMD_DEL_MPATH,
8041                 .doit = nl80211_del_mpath,
8042                 .policy = nl80211_policy,
8043                 .flags = GENL_ADMIN_PERM,
8044                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8045                                   NL80211_FLAG_NEED_RTNL,
8046         },
8047         {
8048                 .cmd = NL80211_CMD_SET_BSS,
8049                 .doit = nl80211_set_bss,
8050                 .policy = nl80211_policy,
8051                 .flags = GENL_ADMIN_PERM,
8052                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8053                                   NL80211_FLAG_NEED_RTNL,
8054         },
8055         {
8056                 .cmd = NL80211_CMD_GET_REG,
8057                 .doit = nl80211_get_reg,
8058                 .policy = nl80211_policy,
8059                 /* can be retrieved by unprivileged users */
8060         },
8061         {
8062                 .cmd = NL80211_CMD_SET_REG,
8063                 .doit = nl80211_set_reg,
8064                 .policy = nl80211_policy,
8065                 .flags = GENL_ADMIN_PERM,
8066         },
8067         {
8068                 .cmd = NL80211_CMD_REQ_SET_REG,
8069                 .doit = nl80211_req_set_reg,
8070                 .policy = nl80211_policy,
8071                 .flags = GENL_ADMIN_PERM,
8072         },
8073         {
8074                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
8075                 .doit = nl80211_get_mesh_config,
8076                 .policy = nl80211_policy,
8077                 /* can be retrieved by unprivileged users */
8078                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8079                                   NL80211_FLAG_NEED_RTNL,
8080         },
8081         {
8082                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
8083                 .doit = nl80211_update_mesh_config,
8084                 .policy = nl80211_policy,
8085                 .flags = GENL_ADMIN_PERM,
8086                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8087                                   NL80211_FLAG_NEED_RTNL,
8088         },
8089         {
8090                 .cmd = NL80211_CMD_TRIGGER_SCAN,
8091                 .doit = nl80211_trigger_scan,
8092                 .policy = nl80211_policy,
8093                 .flags = GENL_ADMIN_PERM,
8094                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8095                                   NL80211_FLAG_NEED_RTNL,
8096         },
8097         {
8098                 .cmd = NL80211_CMD_GET_SCAN,
8099                 .policy = nl80211_policy,
8100                 .dumpit = nl80211_dump_scan,
8101         },
8102         {
8103                 .cmd = NL80211_CMD_START_SCHED_SCAN,
8104                 .doit = nl80211_start_sched_scan,
8105                 .policy = nl80211_policy,
8106                 .flags = GENL_ADMIN_PERM,
8107                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8108                                   NL80211_FLAG_NEED_RTNL,
8109         },
8110         {
8111                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
8112                 .doit = nl80211_stop_sched_scan,
8113                 .policy = nl80211_policy,
8114                 .flags = GENL_ADMIN_PERM,
8115                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8116                                   NL80211_FLAG_NEED_RTNL,
8117         },
8118         {
8119                 .cmd = NL80211_CMD_AUTHENTICATE,
8120                 .doit = nl80211_authenticate,
8121                 .policy = nl80211_policy,
8122                 .flags = GENL_ADMIN_PERM,
8123                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8124                                   NL80211_FLAG_NEED_RTNL,
8125         },
8126         {
8127                 .cmd = NL80211_CMD_ASSOCIATE,
8128                 .doit = nl80211_associate,
8129                 .policy = nl80211_policy,
8130                 .flags = GENL_ADMIN_PERM,
8131                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8132                                   NL80211_FLAG_NEED_RTNL,
8133         },
8134         {
8135                 .cmd = NL80211_CMD_DEAUTHENTICATE,
8136                 .doit = nl80211_deauthenticate,
8137                 .policy = nl80211_policy,
8138                 .flags = GENL_ADMIN_PERM,
8139                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8140                                   NL80211_FLAG_NEED_RTNL,
8141         },
8142         {
8143                 .cmd = NL80211_CMD_DISASSOCIATE,
8144                 .doit = nl80211_disassociate,
8145                 .policy = nl80211_policy,
8146                 .flags = GENL_ADMIN_PERM,
8147                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8148                                   NL80211_FLAG_NEED_RTNL,
8149         },
8150         {
8151                 .cmd = NL80211_CMD_JOIN_IBSS,
8152                 .doit = nl80211_join_ibss,
8153                 .policy = nl80211_policy,
8154                 .flags = GENL_ADMIN_PERM,
8155                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8156                                   NL80211_FLAG_NEED_RTNL,
8157         },
8158         {
8159                 .cmd = NL80211_CMD_LEAVE_IBSS,
8160                 .doit = nl80211_leave_ibss,
8161                 .policy = nl80211_policy,
8162                 .flags = GENL_ADMIN_PERM,
8163                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8164                                   NL80211_FLAG_NEED_RTNL,
8165         },
8166 #ifdef CONFIG_NL80211_TESTMODE
8167         {
8168                 .cmd = NL80211_CMD_TESTMODE,
8169                 .doit = nl80211_testmode_do,
8170                 .dumpit = nl80211_testmode_dump,
8171                 .policy = nl80211_policy,
8172                 .flags = GENL_ADMIN_PERM,
8173                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8174                                   NL80211_FLAG_NEED_RTNL,
8175         },
8176 #endif
8177         {
8178                 .cmd = NL80211_CMD_CONNECT,
8179                 .doit = nl80211_connect,
8180                 .policy = nl80211_policy,
8181                 .flags = GENL_ADMIN_PERM,
8182                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8183                                   NL80211_FLAG_NEED_RTNL,
8184         },
8185         {
8186                 .cmd = NL80211_CMD_DISCONNECT,
8187                 .doit = nl80211_disconnect,
8188                 .policy = nl80211_policy,
8189                 .flags = GENL_ADMIN_PERM,
8190                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8191                                   NL80211_FLAG_NEED_RTNL,
8192         },
8193         {
8194                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
8195                 .doit = nl80211_wiphy_netns,
8196                 .policy = nl80211_policy,
8197                 .flags = GENL_ADMIN_PERM,
8198                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8199                                   NL80211_FLAG_NEED_RTNL,
8200         },
8201         {
8202                 .cmd = NL80211_CMD_GET_SURVEY,
8203                 .policy = nl80211_policy,
8204                 .dumpit = nl80211_dump_survey,
8205         },
8206         {
8207                 .cmd = NL80211_CMD_SET_PMKSA,
8208                 .doit = nl80211_setdel_pmksa,
8209                 .policy = nl80211_policy,
8210                 .flags = GENL_ADMIN_PERM,
8211                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8212                                   NL80211_FLAG_NEED_RTNL,
8213         },
8214         {
8215                 .cmd = NL80211_CMD_DEL_PMKSA,
8216                 .doit = nl80211_setdel_pmksa,
8217                 .policy = nl80211_policy,
8218                 .flags = GENL_ADMIN_PERM,
8219                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8220                                   NL80211_FLAG_NEED_RTNL,
8221         },
8222         {
8223                 .cmd = NL80211_CMD_FLUSH_PMKSA,
8224                 .doit = nl80211_flush_pmksa,
8225                 .policy = nl80211_policy,
8226                 .flags = GENL_ADMIN_PERM,
8227                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8228                                   NL80211_FLAG_NEED_RTNL,
8229         },
8230         {
8231                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
8232                 .doit = nl80211_remain_on_channel,
8233                 .policy = nl80211_policy,
8234                 .flags = GENL_ADMIN_PERM,
8235                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8236                                   NL80211_FLAG_NEED_RTNL,
8237         },
8238         {
8239                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8240                 .doit = nl80211_cancel_remain_on_channel,
8241                 .policy = nl80211_policy,
8242                 .flags = GENL_ADMIN_PERM,
8243                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8244                                   NL80211_FLAG_NEED_RTNL,
8245         },
8246         {
8247                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
8248                 .doit = nl80211_set_tx_bitrate_mask,
8249                 .policy = nl80211_policy,
8250                 .flags = GENL_ADMIN_PERM,
8251                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8252                                   NL80211_FLAG_NEED_RTNL,
8253         },
8254         {
8255                 .cmd = NL80211_CMD_REGISTER_FRAME,
8256                 .doit = nl80211_register_mgmt,
8257                 .policy = nl80211_policy,
8258                 .flags = GENL_ADMIN_PERM,
8259                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8260                                   NL80211_FLAG_NEED_RTNL,
8261         },
8262         {
8263                 .cmd = NL80211_CMD_FRAME,
8264                 .doit = nl80211_tx_mgmt,
8265                 .policy = nl80211_policy,
8266                 .flags = GENL_ADMIN_PERM,
8267                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8268                                   NL80211_FLAG_NEED_RTNL,
8269         },
8270         {
8271                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
8272                 .doit = nl80211_tx_mgmt_cancel_wait,
8273                 .policy = nl80211_policy,
8274                 .flags = GENL_ADMIN_PERM,
8275                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8276                                   NL80211_FLAG_NEED_RTNL,
8277         },
8278         {
8279                 .cmd = NL80211_CMD_SET_POWER_SAVE,
8280                 .doit = nl80211_set_power_save,
8281                 .policy = nl80211_policy,
8282                 .flags = GENL_ADMIN_PERM,
8283                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8284                                   NL80211_FLAG_NEED_RTNL,
8285         },
8286         {
8287                 .cmd = NL80211_CMD_GET_POWER_SAVE,
8288                 .doit = nl80211_get_power_save,
8289                 .policy = nl80211_policy,
8290                 /* can be retrieved by unprivileged users */
8291                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8292                                   NL80211_FLAG_NEED_RTNL,
8293         },
8294         {
8295                 .cmd = NL80211_CMD_SET_CQM,
8296                 .doit = nl80211_set_cqm,
8297                 .policy = nl80211_policy,
8298                 .flags = GENL_ADMIN_PERM,
8299                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8300                                   NL80211_FLAG_NEED_RTNL,
8301         },
8302         {
8303                 .cmd = NL80211_CMD_SET_CHANNEL,
8304                 .doit = nl80211_set_channel,
8305                 .policy = nl80211_policy,
8306                 .flags = GENL_ADMIN_PERM,
8307                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8308                                   NL80211_FLAG_NEED_RTNL,
8309         },
8310         {
8311                 .cmd = NL80211_CMD_SET_WDS_PEER,
8312                 .doit = nl80211_set_wds_peer,
8313                 .policy = nl80211_policy,
8314                 .flags = GENL_ADMIN_PERM,
8315                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8316                                   NL80211_FLAG_NEED_RTNL,
8317         },
8318         {
8319                 .cmd = NL80211_CMD_JOIN_MESH,
8320                 .doit = nl80211_join_mesh,
8321                 .policy = nl80211_policy,
8322                 .flags = GENL_ADMIN_PERM,
8323                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8324                                   NL80211_FLAG_NEED_RTNL,
8325         },
8326         {
8327                 .cmd = NL80211_CMD_LEAVE_MESH,
8328                 .doit = nl80211_leave_mesh,
8329                 .policy = nl80211_policy,
8330                 .flags = GENL_ADMIN_PERM,
8331                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8332                                   NL80211_FLAG_NEED_RTNL,
8333         },
8334 #ifdef CONFIG_PM
8335         {
8336                 .cmd = NL80211_CMD_GET_WOWLAN,
8337                 .doit = nl80211_get_wowlan,
8338                 .policy = nl80211_policy,
8339                 /* can be retrieved by unprivileged users */
8340                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8341                                   NL80211_FLAG_NEED_RTNL,
8342         },
8343         {
8344                 .cmd = NL80211_CMD_SET_WOWLAN,
8345                 .doit = nl80211_set_wowlan,
8346                 .policy = nl80211_policy,
8347                 .flags = GENL_ADMIN_PERM,
8348                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8349                                   NL80211_FLAG_NEED_RTNL,
8350         },
8351 #endif
8352         {
8353                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
8354                 .doit = nl80211_set_rekey_data,
8355                 .policy = nl80211_policy,
8356                 .flags = GENL_ADMIN_PERM,
8357                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8358                                   NL80211_FLAG_NEED_RTNL,
8359         },
8360         {
8361                 .cmd = NL80211_CMD_TDLS_MGMT,
8362                 .doit = nl80211_tdls_mgmt,
8363                 .policy = nl80211_policy,
8364                 .flags = GENL_ADMIN_PERM,
8365                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8366                                   NL80211_FLAG_NEED_RTNL,
8367         },
8368         {
8369                 .cmd = NL80211_CMD_TDLS_OPER,
8370                 .doit = nl80211_tdls_oper,
8371                 .policy = nl80211_policy,
8372                 .flags = GENL_ADMIN_PERM,
8373                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8374                                   NL80211_FLAG_NEED_RTNL,
8375         },
8376         {
8377                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
8378                 .doit = nl80211_register_unexpected_frame,
8379                 .policy = nl80211_policy,
8380                 .flags = GENL_ADMIN_PERM,
8381                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8382                                   NL80211_FLAG_NEED_RTNL,
8383         },
8384         {
8385                 .cmd = NL80211_CMD_PROBE_CLIENT,
8386                 .doit = nl80211_probe_client,
8387                 .policy = nl80211_policy,
8388                 .flags = GENL_ADMIN_PERM,
8389                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8390                                   NL80211_FLAG_NEED_RTNL,
8391         },
8392         {
8393                 .cmd = NL80211_CMD_REGISTER_BEACONS,
8394                 .doit = nl80211_register_beacons,
8395                 .policy = nl80211_policy,
8396                 .flags = GENL_ADMIN_PERM,
8397                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
8398                                   NL80211_FLAG_NEED_RTNL,
8399         },
8400         {
8401                 .cmd = NL80211_CMD_SET_NOACK_MAP,
8402                 .doit = nl80211_set_noack_map,
8403                 .policy = nl80211_policy,
8404                 .flags = GENL_ADMIN_PERM,
8405                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8406                                   NL80211_FLAG_NEED_RTNL,
8407         },
8408         {
8409                 .cmd = NL80211_CMD_START_P2P_DEVICE,
8410                 .doit = nl80211_start_p2p_device,
8411                 .policy = nl80211_policy,
8412                 .flags = GENL_ADMIN_PERM,
8413                 .internal_flags = NL80211_FLAG_NEED_WDEV |
8414                                   NL80211_FLAG_NEED_RTNL,
8415         },
8416         {
8417                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
8418                 .doit = nl80211_stop_p2p_device,
8419                 .policy = nl80211_policy,
8420                 .flags = GENL_ADMIN_PERM,
8421                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
8422                                   NL80211_FLAG_NEED_RTNL,
8423         },
8424         {
8425                 .cmd = NL80211_CMD_SET_MCAST_RATE,
8426                 .doit = nl80211_set_mcast_rate,
8427                 .policy = nl80211_policy,
8428                 .flags = GENL_ADMIN_PERM,
8429                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8430                                   NL80211_FLAG_NEED_RTNL,
8431         },
8432         {
8433                 .cmd = NL80211_CMD_SET_MAC_ACL,
8434                 .doit = nl80211_set_mac_acl,
8435                 .policy = nl80211_policy,
8436                 .flags = GENL_ADMIN_PERM,
8437                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
8438                                   NL80211_FLAG_NEED_RTNL,
8439         },
8440         {
8441                 .cmd = NL80211_CMD_RADAR_DETECT,
8442                 .doit = nl80211_start_radar_detection,
8443                 .policy = nl80211_policy,
8444                 .flags = GENL_ADMIN_PERM,
8445                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
8446                                   NL80211_FLAG_NEED_RTNL,
8447         },
8448 };
8449
8450 static struct genl_multicast_group nl80211_mlme_mcgrp = {
8451         .name = "mlme",
8452 };
8453
8454 /* multicast groups */
8455 static struct genl_multicast_group nl80211_config_mcgrp = {
8456         .name = "config",
8457 };
8458 static struct genl_multicast_group nl80211_scan_mcgrp = {
8459         .name = "scan",
8460 };
8461 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
8462         .name = "regulatory",
8463 };
8464
8465 /* notification functions */
8466
8467 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
8468 {
8469         struct sk_buff *msg;
8470
8471         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8472         if (!msg)
8473                 return;
8474
8475         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
8476                 nlmsg_free(msg);
8477                 return;
8478         }
8479
8480         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8481                                 nl80211_config_mcgrp.id, GFP_KERNEL);
8482 }
8483
8484 static int nl80211_add_scan_req(struct sk_buff *msg,
8485                                 struct cfg80211_registered_device *rdev)
8486 {
8487         struct cfg80211_scan_request *req = rdev->scan_req;
8488         struct nlattr *nest;
8489         int i;
8490
8491         lockdep_assert_held(&rdev->sched_scan_mtx);
8492
8493         if (WARN_ON(!req))
8494                 return 0;
8495
8496         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
8497         if (!nest)
8498                 goto nla_put_failure;
8499         for (i = 0; i < req->n_ssids; i++) {
8500                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
8501                         goto nla_put_failure;
8502         }
8503         nla_nest_end(msg, nest);
8504
8505         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
8506         if (!nest)
8507                 goto nla_put_failure;
8508         for (i = 0; i < req->n_channels; i++) {
8509                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
8510                         goto nla_put_failure;
8511         }
8512         nla_nest_end(msg, nest);
8513
8514         if (req->ie &&
8515             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
8516                 goto nla_put_failure;
8517
8518         if (req->flags)
8519                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
8520
8521         return 0;
8522  nla_put_failure:
8523         return -ENOBUFS;
8524 }
8525
8526 static int nl80211_send_scan_msg(struct sk_buff *msg,
8527                                  struct cfg80211_registered_device *rdev,
8528                                  struct wireless_dev *wdev,
8529                                  u32 portid, u32 seq, int flags,
8530                                  u32 cmd)
8531 {
8532         void *hdr;
8533
8534         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8535         if (!hdr)
8536                 return -1;
8537
8538         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8539             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8540                                          wdev->netdev->ifindex)) ||
8541             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
8542                 goto nla_put_failure;
8543
8544         /* ignore errors and send incomplete event anyway */
8545         nl80211_add_scan_req(msg, rdev);
8546
8547         return genlmsg_end(msg, hdr);
8548
8549  nla_put_failure:
8550         genlmsg_cancel(msg, hdr);
8551         return -EMSGSIZE;
8552 }
8553
8554 static int
8555 nl80211_send_sched_scan_msg(struct sk_buff *msg,
8556                             struct cfg80211_registered_device *rdev,
8557                             struct net_device *netdev,
8558                             u32 portid, u32 seq, int flags, u32 cmd)
8559 {
8560         void *hdr;
8561
8562         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
8563         if (!hdr)
8564                 return -1;
8565
8566         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8567             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8568                 goto nla_put_failure;
8569
8570         return genlmsg_end(msg, hdr);
8571
8572  nla_put_failure:
8573         genlmsg_cancel(msg, hdr);
8574         return -EMSGSIZE;
8575 }
8576
8577 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
8578                              struct wireless_dev *wdev)
8579 {
8580         struct sk_buff *msg;
8581
8582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8583         if (!msg)
8584                 return;
8585
8586         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8587                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
8588                 nlmsg_free(msg);
8589                 return;
8590         }
8591
8592         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8593                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8594 }
8595
8596 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
8597                             struct wireless_dev *wdev)
8598 {
8599         struct sk_buff *msg;
8600
8601         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8602         if (!msg)
8603                 return;
8604
8605         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8606                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
8607                 nlmsg_free(msg);
8608                 return;
8609         }
8610
8611         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8612                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8613 }
8614
8615 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
8616                                struct wireless_dev *wdev)
8617 {
8618         struct sk_buff *msg;
8619
8620         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8621         if (!msg)
8622                 return;
8623
8624         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
8625                                   NL80211_CMD_SCAN_ABORTED) < 0) {
8626                 nlmsg_free(msg);
8627                 return;
8628         }
8629
8630         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8631                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8632 }
8633
8634 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
8635                                      struct net_device *netdev)
8636 {
8637         struct sk_buff *msg;
8638
8639         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8640         if (!msg)
8641                 return;
8642
8643         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
8644                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
8645                 nlmsg_free(msg);
8646                 return;
8647         }
8648
8649         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8650                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8651 }
8652
8653 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
8654                              struct net_device *netdev, u32 cmd)
8655 {
8656         struct sk_buff *msg;
8657
8658         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8659         if (!msg)
8660                 return;
8661
8662         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
8663                 nlmsg_free(msg);
8664                 return;
8665         }
8666
8667         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8668                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8669 }
8670
8671 /*
8672  * This can happen on global regulatory changes or device specific settings
8673  * based on custom world regulatory domains.
8674  */
8675 void nl80211_send_reg_change_event(struct regulatory_request *request)
8676 {
8677         struct sk_buff *msg;
8678         void *hdr;
8679
8680         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8681         if (!msg)
8682                 return;
8683
8684         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8685         if (!hdr) {
8686                 nlmsg_free(msg);
8687                 return;
8688         }
8689
8690         /* Userspace can always count this one always being set */
8691         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8692                 goto nla_put_failure;
8693
8694         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8695                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8696                                NL80211_REGDOM_TYPE_WORLD))
8697                         goto nla_put_failure;
8698         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8699                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8700                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8701                         goto nla_put_failure;
8702         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8703                    request->intersect) {
8704                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8705                                NL80211_REGDOM_TYPE_INTERSECTION))
8706                         goto nla_put_failure;
8707         } else {
8708                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8709                                NL80211_REGDOM_TYPE_COUNTRY) ||
8710                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8711                                    request->alpha2))
8712                         goto nla_put_failure;
8713         }
8714
8715         if (request->wiphy_idx != WIPHY_IDX_INVALID &&
8716             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8717                 goto nla_put_failure;
8718
8719         genlmsg_end(msg, hdr);
8720
8721         rcu_read_lock();
8722         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8723                                 GFP_ATOMIC);
8724         rcu_read_unlock();
8725
8726         return;
8727
8728 nla_put_failure:
8729         genlmsg_cancel(msg, hdr);
8730         nlmsg_free(msg);
8731 }
8732
8733 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8734                                     struct net_device *netdev,
8735                                     const u8 *buf, size_t len,
8736                                     enum nl80211_commands cmd, gfp_t gfp)
8737 {
8738         struct sk_buff *msg;
8739         void *hdr;
8740
8741         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8742         if (!msg)
8743                 return;
8744
8745         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8746         if (!hdr) {
8747                 nlmsg_free(msg);
8748                 return;
8749         }
8750
8751         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8752             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8753             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8754                 goto nla_put_failure;
8755
8756         genlmsg_end(msg, hdr);
8757
8758         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8759                                 nl80211_mlme_mcgrp.id, gfp);
8760         return;
8761
8762  nla_put_failure:
8763         genlmsg_cancel(msg, hdr);
8764         nlmsg_free(msg);
8765 }
8766
8767 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8768                           struct net_device *netdev, const u8 *buf,
8769                           size_t len, gfp_t gfp)
8770 {
8771         nl80211_send_mlme_event(rdev, netdev, buf, len,
8772                                 NL80211_CMD_AUTHENTICATE, gfp);
8773 }
8774
8775 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8776                            struct net_device *netdev, const u8 *buf,
8777                            size_t len, gfp_t gfp)
8778 {
8779         nl80211_send_mlme_event(rdev, netdev, buf, len,
8780                                 NL80211_CMD_ASSOCIATE, gfp);
8781 }
8782
8783 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8784                          struct net_device *netdev, const u8 *buf,
8785                          size_t len, gfp_t gfp)
8786 {
8787         nl80211_send_mlme_event(rdev, netdev, buf, len,
8788                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8789 }
8790
8791 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8792                            struct net_device *netdev, const u8 *buf,
8793                            size_t len, gfp_t gfp)
8794 {
8795         nl80211_send_mlme_event(rdev, netdev, buf, len,
8796                                 NL80211_CMD_DISASSOCIATE, gfp);
8797 }
8798
8799 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8800                                 struct net_device *netdev, const u8 *buf,
8801                                 size_t len, gfp_t gfp)
8802 {
8803         nl80211_send_mlme_event(rdev, netdev, buf, len,
8804                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8805 }
8806
8807 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8808                                   struct net_device *netdev, const u8 *buf,
8809                                   size_t len, gfp_t gfp)
8810 {
8811         nl80211_send_mlme_event(rdev, netdev, buf, len,
8812                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8813 }
8814
8815 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8816                                       struct net_device *netdev, int cmd,
8817                                       const u8 *addr, gfp_t gfp)
8818 {
8819         struct sk_buff *msg;
8820         void *hdr;
8821
8822         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8823         if (!msg)
8824                 return;
8825
8826         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8827         if (!hdr) {
8828                 nlmsg_free(msg);
8829                 return;
8830         }
8831
8832         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8833             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8834             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8835             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8836                 goto nla_put_failure;
8837
8838         genlmsg_end(msg, hdr);
8839
8840         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8841                                 nl80211_mlme_mcgrp.id, gfp);
8842         return;
8843
8844  nla_put_failure:
8845         genlmsg_cancel(msg, hdr);
8846         nlmsg_free(msg);
8847 }
8848
8849 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8850                                struct net_device *netdev, const u8 *addr,
8851                                gfp_t gfp)
8852 {
8853         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8854                                   addr, gfp);
8855 }
8856
8857 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8858                                 struct net_device *netdev, const u8 *addr,
8859                                 gfp_t gfp)
8860 {
8861         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8862                                   addr, gfp);
8863 }
8864
8865 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8866                                  struct net_device *netdev, const u8 *bssid,
8867                                  const u8 *req_ie, size_t req_ie_len,
8868                                  const u8 *resp_ie, size_t resp_ie_len,
8869                                  u16 status, gfp_t gfp)
8870 {
8871         struct sk_buff *msg;
8872         void *hdr;
8873
8874         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8875         if (!msg)
8876                 return;
8877
8878         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8879         if (!hdr) {
8880                 nlmsg_free(msg);
8881                 return;
8882         }
8883
8884         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8885             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8886             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8887             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8888             (req_ie &&
8889              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8890             (resp_ie &&
8891              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8892                 goto nla_put_failure;
8893
8894         genlmsg_end(msg, hdr);
8895
8896         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8897                                 nl80211_mlme_mcgrp.id, gfp);
8898         return;
8899
8900  nla_put_failure:
8901         genlmsg_cancel(msg, hdr);
8902         nlmsg_free(msg);
8903
8904 }
8905
8906 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8907                          struct net_device *netdev, const u8 *bssid,
8908                          const u8 *req_ie, size_t req_ie_len,
8909                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8910 {
8911         struct sk_buff *msg;
8912         void *hdr;
8913
8914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8915         if (!msg)
8916                 return;
8917
8918         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8919         if (!hdr) {
8920                 nlmsg_free(msg);
8921                 return;
8922         }
8923
8924         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8925             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8926             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8927             (req_ie &&
8928              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8929             (resp_ie &&
8930              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8931                 goto nla_put_failure;
8932
8933         genlmsg_end(msg, hdr);
8934
8935         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8936                                 nl80211_mlme_mcgrp.id, gfp);
8937         return;
8938
8939  nla_put_failure:
8940         genlmsg_cancel(msg, hdr);
8941         nlmsg_free(msg);
8942
8943 }
8944
8945 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8946                                struct net_device *netdev, u16 reason,
8947                                const u8 *ie, size_t ie_len, bool from_ap)
8948 {
8949         struct sk_buff *msg;
8950         void *hdr;
8951
8952         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8953         if (!msg)
8954                 return;
8955
8956         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8957         if (!hdr) {
8958                 nlmsg_free(msg);
8959                 return;
8960         }
8961
8962         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8963             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8964             (from_ap && reason &&
8965              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8966             (from_ap &&
8967              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8968             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8969                 goto nla_put_failure;
8970
8971         genlmsg_end(msg, hdr);
8972
8973         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8974                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8975         return;
8976
8977  nla_put_failure:
8978         genlmsg_cancel(msg, hdr);
8979         nlmsg_free(msg);
8980
8981 }
8982
8983 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8984                              struct net_device *netdev, const u8 *bssid,
8985                              gfp_t gfp)
8986 {
8987         struct sk_buff *msg;
8988         void *hdr;
8989
8990         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8991         if (!msg)
8992                 return;
8993
8994         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8995         if (!hdr) {
8996                 nlmsg_free(msg);
8997                 return;
8998         }
8999
9000         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9001             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9002             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9003                 goto nla_put_failure;
9004
9005         genlmsg_end(msg, hdr);
9006
9007         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9008                                 nl80211_mlme_mcgrp.id, gfp);
9009         return;
9010
9011  nla_put_failure:
9012         genlmsg_cancel(msg, hdr);
9013         nlmsg_free(msg);
9014 }
9015
9016 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
9017                 struct net_device *netdev,
9018                 const u8 *macaddr, const u8* ie, u8 ie_len,
9019                 gfp_t gfp)
9020 {
9021         struct sk_buff *msg;
9022         void *hdr;
9023
9024         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9025         if (!msg)
9026                 return;
9027
9028         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
9029         if (!hdr) {
9030                 nlmsg_free(msg);
9031                 return;
9032         }
9033
9034         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9035             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9036             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
9037             (ie_len && ie &&
9038              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
9039                 goto nla_put_failure;
9040
9041         genlmsg_end(msg, hdr);
9042
9043         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9044                                 nl80211_mlme_mcgrp.id, gfp);
9045         return;
9046
9047  nla_put_failure:
9048         genlmsg_cancel(msg, hdr);
9049         nlmsg_free(msg);
9050 }
9051
9052 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
9053                                  struct net_device *netdev, const u8 *addr,
9054                                  enum nl80211_key_type key_type, int key_id,
9055                                  const u8 *tsc, gfp_t gfp)
9056 {
9057         struct sk_buff *msg;
9058         void *hdr;
9059
9060         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9061         if (!msg)
9062                 return;
9063
9064         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
9065         if (!hdr) {
9066                 nlmsg_free(msg);
9067                 return;
9068         }
9069
9070         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9071             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9072             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
9073             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
9074             (key_id != -1 &&
9075              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
9076             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
9077                 goto nla_put_failure;
9078
9079         genlmsg_end(msg, hdr);
9080
9081         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9082                                 nl80211_mlme_mcgrp.id, gfp);
9083         return;
9084
9085  nla_put_failure:
9086         genlmsg_cancel(msg, hdr);
9087         nlmsg_free(msg);
9088 }
9089
9090 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
9091                                     struct ieee80211_channel *channel_before,
9092                                     struct ieee80211_channel *channel_after)
9093 {
9094         struct sk_buff *msg;
9095         void *hdr;
9096         struct nlattr *nl_freq;
9097
9098         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
9099         if (!msg)
9100                 return;
9101
9102         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
9103         if (!hdr) {
9104                 nlmsg_free(msg);
9105                 return;
9106         }
9107
9108         /*
9109          * Since we are applying the beacon hint to a wiphy we know its
9110          * wiphy_idx is valid
9111          */
9112         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
9113                 goto nla_put_failure;
9114
9115         /* Before */
9116         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
9117         if (!nl_freq)
9118                 goto nla_put_failure;
9119         if (nl80211_msg_put_channel(msg, channel_before))
9120                 goto nla_put_failure;
9121         nla_nest_end(msg, nl_freq);
9122
9123         /* After */
9124         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
9125         if (!nl_freq)
9126                 goto nla_put_failure;
9127         if (nl80211_msg_put_channel(msg, channel_after))
9128                 goto nla_put_failure;
9129         nla_nest_end(msg, nl_freq);
9130
9131         genlmsg_end(msg, hdr);
9132
9133         rcu_read_lock();
9134         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
9135                                 GFP_ATOMIC);
9136         rcu_read_unlock();
9137
9138         return;
9139
9140 nla_put_failure:
9141         genlmsg_cancel(msg, hdr);
9142         nlmsg_free(msg);
9143 }
9144
9145 static void nl80211_send_remain_on_chan_event(
9146         int cmd, struct cfg80211_registered_device *rdev,
9147         struct wireless_dev *wdev, u64 cookie,
9148         struct ieee80211_channel *chan,
9149         unsigned int duration, gfp_t gfp)
9150 {
9151         struct sk_buff *msg;
9152         void *hdr;
9153
9154         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9155         if (!msg)
9156                 return;
9157
9158         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9159         if (!hdr) {
9160                 nlmsg_free(msg);
9161                 return;
9162         }
9163
9164         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9165             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9166                                          wdev->netdev->ifindex)) ||
9167             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
9168             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
9169             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
9170                         NL80211_CHAN_NO_HT) ||
9171             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
9172                 goto nla_put_failure;
9173
9174         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
9175             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
9176                 goto nla_put_failure;
9177
9178         genlmsg_end(msg, hdr);
9179
9180         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9181                                 nl80211_mlme_mcgrp.id, gfp);
9182         return;
9183
9184  nla_put_failure:
9185         genlmsg_cancel(msg, hdr);
9186         nlmsg_free(msg);
9187 }
9188
9189 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
9190                                     struct wireless_dev *wdev, u64 cookie,
9191                                     struct ieee80211_channel *chan,
9192                                     unsigned int duration, gfp_t gfp)
9193 {
9194         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
9195                                           rdev, wdev, cookie, chan,
9196                                           duration, gfp);
9197 }
9198
9199 void nl80211_send_remain_on_channel_cancel(
9200         struct cfg80211_registered_device *rdev,
9201         struct wireless_dev *wdev,
9202         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
9203 {
9204         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
9205                                           rdev, wdev, cookie, chan, 0, gfp);
9206 }
9207
9208 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
9209                             struct net_device *dev, const u8 *mac_addr,
9210                             struct station_info *sinfo, gfp_t gfp)
9211 {
9212         struct sk_buff *msg;
9213
9214         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9215         if (!msg)
9216                 return;
9217
9218         if (nl80211_send_station(msg, 0, 0, 0,
9219                                  rdev, dev, mac_addr, sinfo) < 0) {
9220                 nlmsg_free(msg);
9221                 return;
9222         }
9223
9224         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9225                                 nl80211_mlme_mcgrp.id, gfp);
9226 }
9227
9228 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
9229                                 struct net_device *dev, const u8 *mac_addr,
9230                                 gfp_t gfp)
9231 {
9232         struct sk_buff *msg;
9233         void *hdr;
9234
9235         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9236         if (!msg)
9237                 return;
9238
9239         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
9240         if (!hdr) {
9241                 nlmsg_free(msg);
9242                 return;
9243         }
9244
9245         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9246             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
9247                 goto nla_put_failure;
9248
9249         genlmsg_end(msg, hdr);
9250
9251         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9252                                 nl80211_mlme_mcgrp.id, gfp);
9253         return;
9254
9255  nla_put_failure:
9256         genlmsg_cancel(msg, hdr);
9257         nlmsg_free(msg);
9258 }
9259
9260 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
9261                                     struct net_device *dev, const u8 *mac_addr,
9262                                     enum nl80211_connect_failed_reason reason,
9263                                     gfp_t gfp)
9264 {
9265         struct sk_buff *msg;
9266         void *hdr;
9267
9268         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9269         if (!msg)
9270                 return;
9271
9272         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
9273         if (!hdr) {
9274                 nlmsg_free(msg);
9275                 return;
9276         }
9277
9278         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9279             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
9280             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
9281                 goto nla_put_failure;
9282
9283         genlmsg_end(msg, hdr);
9284
9285         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9286                                 nl80211_mlme_mcgrp.id, gfp);
9287         return;
9288
9289  nla_put_failure:
9290         genlmsg_cancel(msg, hdr);
9291         nlmsg_free(msg);
9292 }
9293
9294 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
9295                                        const u8 *addr, gfp_t gfp)
9296 {
9297         struct wireless_dev *wdev = dev->ieee80211_ptr;
9298         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9299         struct sk_buff *msg;
9300         void *hdr;
9301         int err;
9302         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
9303
9304         if (!nlportid)
9305                 return false;
9306
9307         msg = nlmsg_new(100, gfp);
9308         if (!msg)
9309                 return true;
9310
9311         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
9312         if (!hdr) {
9313                 nlmsg_free(msg);
9314                 return true;
9315         }
9316
9317         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9318             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9319             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
9320                 goto nla_put_failure;
9321
9322         err = genlmsg_end(msg, hdr);
9323         if (err < 0) {
9324                 nlmsg_free(msg);
9325                 return true;
9326         }
9327
9328         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9329         return true;
9330
9331  nla_put_failure:
9332         genlmsg_cancel(msg, hdr);
9333         nlmsg_free(msg);
9334         return true;
9335 }
9336
9337 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
9338 {
9339         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
9340                                           addr, gfp);
9341 }
9342
9343 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
9344                                     const u8 *addr, gfp_t gfp)
9345 {
9346         return __nl80211_unexpected_frame(dev,
9347                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
9348                                           addr, gfp);
9349 }
9350
9351 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
9352                       struct wireless_dev *wdev, u32 nlportid,
9353                       int freq, int sig_dbm,
9354                       const u8 *buf, size_t len, gfp_t gfp)
9355 {
9356         struct net_device *netdev = wdev->netdev;
9357         struct sk_buff *msg;
9358         void *hdr;
9359
9360         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9361         if (!msg)
9362                 return -ENOMEM;
9363
9364         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9365         if (!hdr) {
9366                 nlmsg_free(msg);
9367                 return -ENOMEM;
9368         }
9369
9370         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9371             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9372                                         netdev->ifindex)) ||
9373             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
9374             (sig_dbm &&
9375              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9376             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
9377                 goto nla_put_failure;
9378
9379         genlmsg_end(msg, hdr);
9380
9381         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
9382
9383  nla_put_failure:
9384         genlmsg_cancel(msg, hdr);
9385         nlmsg_free(msg);
9386         return -ENOBUFS;
9387 }
9388
9389 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
9390                                  struct wireless_dev *wdev, u64 cookie,
9391                                  const u8 *buf, size_t len, bool ack,
9392                                  gfp_t gfp)
9393 {
9394         struct net_device *netdev = wdev->netdev;
9395         struct sk_buff *msg;
9396         void *hdr;
9397
9398         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9399         if (!msg)
9400                 return;
9401
9402         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
9403         if (!hdr) {
9404                 nlmsg_free(msg);
9405                 return;
9406         }
9407
9408         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9409             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9410                                    netdev->ifindex)) ||
9411             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
9412             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9413             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
9414                 goto nla_put_failure;
9415
9416         genlmsg_end(msg, hdr);
9417
9418         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
9419         return;
9420
9421  nla_put_failure:
9422         genlmsg_cancel(msg, hdr);
9423         nlmsg_free(msg);
9424 }
9425
9426 void
9427 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
9428                              struct net_device *netdev,
9429                              enum nl80211_cqm_rssi_threshold_event rssi_event,
9430                              gfp_t gfp)
9431 {
9432         struct sk_buff *msg;
9433         struct nlattr *pinfoattr;
9434         void *hdr;
9435
9436         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9437         if (!msg)
9438                 return;
9439
9440         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9441         if (!hdr) {
9442                 nlmsg_free(msg);
9443                 return;
9444         }
9445
9446         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9447             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9448                 goto nla_put_failure;
9449
9450         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9451         if (!pinfoattr)
9452                 goto nla_put_failure;
9453
9454         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
9455                         rssi_event))
9456                 goto nla_put_failure;
9457
9458         nla_nest_end(msg, pinfoattr);
9459
9460         genlmsg_end(msg, hdr);
9461
9462         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9463                                 nl80211_mlme_mcgrp.id, gfp);
9464         return;
9465
9466  nla_put_failure:
9467         genlmsg_cancel(msg, hdr);
9468         nlmsg_free(msg);
9469 }
9470
9471 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
9472                               struct net_device *netdev, const u8 *bssid,
9473                               const u8 *replay_ctr, gfp_t gfp)
9474 {
9475         struct sk_buff *msg;
9476         struct nlattr *rekey_attr;
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, NL80211_CMD_SET_REKEY_OFFLOAD);
9484         if (!hdr) {
9485                 nlmsg_free(msg);
9486                 return;
9487         }
9488
9489         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9490             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9491             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
9492                 goto nla_put_failure;
9493
9494         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
9495         if (!rekey_attr)
9496                 goto nla_put_failure;
9497
9498         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
9499                     NL80211_REPLAY_CTR_LEN, replay_ctr))
9500                 goto nla_put_failure;
9501
9502         nla_nest_end(msg, rekey_attr);
9503
9504         genlmsg_end(msg, hdr);
9505
9506         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9507                                 nl80211_mlme_mcgrp.id, gfp);
9508         return;
9509
9510  nla_put_failure:
9511         genlmsg_cancel(msg, hdr);
9512         nlmsg_free(msg);
9513 }
9514
9515 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
9516                                     struct net_device *netdev, int index,
9517                                     const u8 *bssid, bool preauth, gfp_t gfp)
9518 {
9519         struct sk_buff *msg;
9520         struct nlattr *attr;
9521         void *hdr;
9522
9523         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9524         if (!msg)
9525                 return;
9526
9527         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
9528         if (!hdr) {
9529                 nlmsg_free(msg);
9530                 return;
9531         }
9532
9533         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9534             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9535                 goto nla_put_failure;
9536
9537         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
9538         if (!attr)
9539                 goto nla_put_failure;
9540
9541         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
9542             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
9543             (preauth &&
9544              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
9545                 goto nla_put_failure;
9546
9547         nla_nest_end(msg, attr);
9548
9549         genlmsg_end(msg, hdr);
9550
9551         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9552                                 nl80211_mlme_mcgrp.id, gfp);
9553         return;
9554
9555  nla_put_failure:
9556         genlmsg_cancel(msg, hdr);
9557         nlmsg_free(msg);
9558 }
9559
9560 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
9561                               struct net_device *netdev,
9562                               struct cfg80211_chan_def *chandef, gfp_t gfp)
9563 {
9564         struct sk_buff *msg;
9565         void *hdr;
9566
9567         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9568         if (!msg)
9569                 return;
9570
9571         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
9572         if (!hdr) {
9573                 nlmsg_free(msg);
9574                 return;
9575         }
9576
9577         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
9578                 goto nla_put_failure;
9579
9580         if (nl80211_send_chandef(msg, chandef))
9581                 goto nla_put_failure;
9582
9583         genlmsg_end(msg, hdr);
9584
9585         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9586                                 nl80211_mlme_mcgrp.id, gfp);
9587         return;
9588
9589  nla_put_failure:
9590         genlmsg_cancel(msg, hdr);
9591         nlmsg_free(msg);
9592 }
9593
9594 void
9595 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
9596                             struct net_device *netdev, const u8 *peer,
9597                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
9598 {
9599         struct sk_buff *msg;
9600         struct nlattr *pinfoattr;
9601         void *hdr;
9602
9603         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
9604         if (!msg)
9605                 return;
9606
9607         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9608         if (!hdr) {
9609                 nlmsg_free(msg);
9610                 return;
9611         }
9612
9613         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9614             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9615             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9616                 goto nla_put_failure;
9617
9618         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9619         if (!pinfoattr)
9620                 goto nla_put_failure;
9621
9622         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
9623                 goto nla_put_failure;
9624
9625         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
9626                 goto nla_put_failure;
9627
9628         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
9629                 goto nla_put_failure;
9630
9631         nla_nest_end(msg, pinfoattr);
9632
9633         genlmsg_end(msg, hdr);
9634
9635         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9636                                 nl80211_mlme_mcgrp.id, gfp);
9637         return;
9638
9639  nla_put_failure:
9640         genlmsg_cancel(msg, hdr);
9641         nlmsg_free(msg);
9642 }
9643
9644 void
9645 nl80211_radar_notify(struct cfg80211_registered_device *rdev,
9646                      struct cfg80211_chan_def *chandef,
9647                      enum nl80211_radar_event event,
9648                      struct net_device *netdev, gfp_t gfp)
9649 {
9650         struct sk_buff *msg;
9651         void *hdr;
9652
9653         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9654         if (!msg)
9655                 return;
9656
9657         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
9658         if (!hdr) {
9659                 nlmsg_free(msg);
9660                 return;
9661         }
9662
9663         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
9664                 goto nla_put_failure;
9665
9666         /* NOP and radar events don't need a netdev parameter */
9667         if (netdev) {
9668                 struct wireless_dev *wdev = netdev->ieee80211_ptr;
9669
9670                 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9671                     nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9672                         goto nla_put_failure;
9673         }
9674
9675         if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
9676                 goto nla_put_failure;
9677
9678         if (nl80211_send_chandef(msg, chandef))
9679                 goto nla_put_failure;
9680
9681         if (genlmsg_end(msg, hdr) < 0) {
9682                 nlmsg_free(msg);
9683                 return;
9684         }
9685
9686         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9687                                 nl80211_mlme_mcgrp.id, gfp);
9688         return;
9689
9690  nla_put_failure:
9691         genlmsg_cancel(msg, hdr);
9692         nlmsg_free(msg);
9693 }
9694
9695 void
9696 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
9697                                 struct net_device *netdev, const u8 *peer,
9698                                 u32 num_packets, gfp_t gfp)
9699 {
9700         struct sk_buff *msg;
9701         struct nlattr *pinfoattr;
9702         void *hdr;
9703
9704         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9705         if (!msg)
9706                 return;
9707
9708         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9709         if (!hdr) {
9710                 nlmsg_free(msg);
9711                 return;
9712         }
9713
9714         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9715             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9716             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9717                 goto nla_put_failure;
9718
9719         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9720         if (!pinfoattr)
9721                 goto nla_put_failure;
9722
9723         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9724                 goto nla_put_failure;
9725
9726         nla_nest_end(msg, pinfoattr);
9727
9728         genlmsg_end(msg, hdr);
9729
9730         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9731                                 nl80211_mlme_mcgrp.id, gfp);
9732         return;
9733
9734  nla_put_failure:
9735         genlmsg_cancel(msg, hdr);
9736         nlmsg_free(msg);
9737 }
9738
9739 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9740                            u64 cookie, bool acked, gfp_t gfp)
9741 {
9742         struct wireless_dev *wdev = dev->ieee80211_ptr;
9743         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9744         struct sk_buff *msg;
9745         void *hdr;
9746         int err;
9747
9748         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9749
9750         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9751
9752         if (!msg)
9753                 return;
9754
9755         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9756         if (!hdr) {
9757                 nlmsg_free(msg);
9758                 return;
9759         }
9760
9761         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9762             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9763             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9764             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9765             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9766                 goto nla_put_failure;
9767
9768         err = genlmsg_end(msg, hdr);
9769         if (err < 0) {
9770                 nlmsg_free(msg);
9771                 return;
9772         }
9773
9774         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9775                                 nl80211_mlme_mcgrp.id, gfp);
9776         return;
9777
9778  nla_put_failure:
9779         genlmsg_cancel(msg, hdr);
9780         nlmsg_free(msg);
9781 }
9782 EXPORT_SYMBOL(cfg80211_probe_status);
9783
9784 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9785                                  const u8 *frame, size_t len,
9786                                  int freq, int sig_dbm)
9787 {
9788         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9789         struct sk_buff *msg;
9790         void *hdr;
9791         struct cfg80211_beacon_registration *reg;
9792
9793         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9794
9795         spin_lock_bh(&rdev->beacon_registrations_lock);
9796         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9797                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9798                 if (!msg) {
9799                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9800                         return;
9801                 }
9802
9803                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9804                 if (!hdr)
9805                         goto nla_put_failure;
9806
9807                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9808                     (freq &&
9809                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9810                     (sig_dbm &&
9811                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9812                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9813                         goto nla_put_failure;
9814
9815                 genlmsg_end(msg, hdr);
9816
9817                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9818         }
9819         spin_unlock_bh(&rdev->beacon_registrations_lock);
9820         return;
9821
9822  nla_put_failure:
9823         spin_unlock_bh(&rdev->beacon_registrations_lock);
9824         if (hdr)
9825                 genlmsg_cancel(msg, hdr);
9826         nlmsg_free(msg);
9827 }
9828 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9829
9830 #ifdef CONFIG_PM
9831 void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
9832                                    struct cfg80211_wowlan_wakeup *wakeup,
9833                                    gfp_t gfp)
9834 {
9835         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9836         struct sk_buff *msg;
9837         void *hdr;
9838         int err, size = 200;
9839
9840         trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);
9841
9842         if (wakeup)
9843                 size += wakeup->packet_present_len;
9844
9845         msg = nlmsg_new(size, gfp);
9846         if (!msg)
9847                 return;
9848
9849         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
9850         if (!hdr)
9851                 goto free_msg;
9852
9853         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9854             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
9855                 goto free_msg;
9856
9857         if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
9858                                         wdev->netdev->ifindex))
9859                 goto free_msg;
9860
9861         if (wakeup) {
9862                 struct nlattr *reasons;
9863
9864                 reasons = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
9865
9866                 if (wakeup->disconnect &&
9867                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
9868                         goto free_msg;
9869                 if (wakeup->magic_pkt &&
9870                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
9871                         goto free_msg;
9872                 if (wakeup->gtk_rekey_failure &&
9873                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
9874                         goto free_msg;
9875                 if (wakeup->eap_identity_req &&
9876                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
9877                         goto free_msg;
9878                 if (wakeup->four_way_handshake &&
9879                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
9880                         goto free_msg;
9881                 if (wakeup->rfkill_release &&
9882                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
9883                         goto free_msg;
9884
9885                 if (wakeup->pattern_idx >= 0 &&
9886                     nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
9887                                 wakeup->pattern_idx))
9888                         goto free_msg;
9889
9890                 if (wakeup->tcp_match)
9891                         nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH);
9892
9893                 if (wakeup->tcp_connlost)
9894                         nla_put_flag(msg,
9895                                      NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST);
9896
9897                 if (wakeup->tcp_nomoretokens)
9898                         nla_put_flag(msg,
9899                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS);
9900
9901                 if (wakeup->packet) {
9902                         u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
9903                         u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;
9904
9905                         if (!wakeup->packet_80211) {
9906                                 pkt_attr =
9907                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
9908                                 len_attr =
9909                                         NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
9910                         }
9911
9912                         if (wakeup->packet_len &&
9913                             nla_put_u32(msg, len_attr, wakeup->packet_len))
9914                                 goto free_msg;
9915
9916                         if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
9917                                     wakeup->packet))
9918                                 goto free_msg;
9919                 }
9920
9921                 nla_nest_end(msg, reasons);
9922         }
9923
9924         err = genlmsg_end(msg, hdr);
9925         if (err < 0)
9926                 goto free_msg;
9927
9928         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9929                                 nl80211_mlme_mcgrp.id, gfp);
9930         return;
9931
9932  free_msg:
9933         nlmsg_free(msg);
9934 }
9935 EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
9936 #endif
9937
9938 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9939                                 enum nl80211_tdls_operation oper,
9940                                 u16 reason_code, gfp_t gfp)
9941 {
9942         struct wireless_dev *wdev = dev->ieee80211_ptr;
9943         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9944         struct sk_buff *msg;
9945         void *hdr;
9946         int err;
9947
9948         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9949                                          reason_code);
9950
9951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9952         if (!msg)
9953                 return;
9954
9955         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9956         if (!hdr) {
9957                 nlmsg_free(msg);
9958                 return;
9959         }
9960
9961         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9962             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9963             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9964             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9965             (reason_code > 0 &&
9966              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9967                 goto nla_put_failure;
9968
9969         err = genlmsg_end(msg, hdr);
9970         if (err < 0) {
9971                 nlmsg_free(msg);
9972                 return;
9973         }
9974
9975         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9976                                 nl80211_mlme_mcgrp.id, gfp);
9977         return;
9978
9979  nla_put_failure:
9980         genlmsg_cancel(msg, hdr);
9981         nlmsg_free(msg);
9982 }
9983 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9984
9985 static int nl80211_netlink_notify(struct notifier_block * nb,
9986                                   unsigned long state,
9987                                   void *_notify)
9988 {
9989         struct netlink_notify *notify = _notify;
9990         struct cfg80211_registered_device *rdev;
9991         struct wireless_dev *wdev;
9992         struct cfg80211_beacon_registration *reg, *tmp;
9993
9994         if (state != NETLINK_URELEASE)
9995                 return NOTIFY_DONE;
9996
9997         rcu_read_lock();
9998
9999         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
10000                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
10001                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
10002
10003                 spin_lock_bh(&rdev->beacon_registrations_lock);
10004                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
10005                                          list) {
10006                         if (reg->nlportid == notify->portid) {
10007                                 list_del(&reg->list);
10008                                 kfree(reg);
10009                                 break;
10010                         }
10011                 }
10012                 spin_unlock_bh(&rdev->beacon_registrations_lock);
10013         }
10014
10015         rcu_read_unlock();
10016
10017         return NOTIFY_DONE;
10018 }
10019
10020 static struct notifier_block nl80211_netlink_notifier = {
10021         .notifier_call = nl80211_netlink_notify,
10022 };
10023
10024 /* initialisation/exit functions */
10025
10026 int nl80211_init(void)
10027 {
10028         int err;
10029
10030         err = genl_register_family_with_ops(&nl80211_fam,
10031                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
10032         if (err)
10033                 return err;
10034
10035         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
10036         if (err)
10037                 goto err_out;
10038
10039         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
10040         if (err)
10041                 goto err_out;
10042
10043         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
10044         if (err)
10045                 goto err_out;
10046
10047         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
10048         if (err)
10049                 goto err_out;
10050
10051 #ifdef CONFIG_NL80211_TESTMODE
10052         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
10053         if (err)
10054                 goto err_out;
10055 #endif
10056
10057         err = netlink_register_notifier(&nl80211_netlink_notifier);
10058         if (err)
10059                 goto err_out;
10060
10061         return 0;
10062  err_out:
10063         genl_unregister_family(&nl80211_fam);
10064         return err;
10065 }
10066
10067 void nl80211_exit(void)
10068 {
10069         netlink_unregister_notifier(&nl80211_netlink_notifier);
10070         genl_unregister_family(&nl80211_fam);
10071 }