SAFE public projects git trees. - safe/jmp/linux-2.6/blob - net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2009  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/list.h>
  11 #include <linux/if_ether.h>
  12 #include <linux/ieee80211.h>
  13 #include <linux/nl80211.h>
  14 #include <linux/rtnetlink.h>
  15 #include <linux/netlink.h>
  16 #include <linux/etherdevice.h>
  17 #include <net/net_namespace.h>
  18 #include <net/genetlink.h>
  19 #include <net/cfg80211.h>
  20 #include <net/sock.h>
  21 #include "core.h"
  22 #include "nl80211.h"
  23 #include "reg.h"
  24
  25 /* the netlink family */
  26 static struct genl_family nl80211_fam = {
  27         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  28         .name = "nl80211",      /* have users key off the name instead */
  29         .hdrsize = 0,           /* no private header */
  30         .version = 1,           /* no particular meaning now */
  31         .maxattr = NL80211_ATTR_MAX,
  32         .netnsok = true,
  33 };
  34
  35 /* internal helper: get rdev and dev */
  36 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  37                                        struct cfg80211_registered_device **rdev,
  38                                        struct net_device **dev)
  39 {
  40         struct nlattr **attrs = info->attrs;
  41         int ifindex;
  42
  43         if (!attrs[NL80211_ATTR_IFINDEX])
  44                 return -EINVAL;
  45
  46         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  47         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  48         if (!*dev)
  49                 return -ENODEV;
  50
  51         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  52         if (IS_ERR(*rdev)) {
  53                 dev_put(*dev);
  54                 return PTR_ERR(*rdev);
  55         }
  56
  57         return 0;
  58 }
  59
  60 /* policy for the attributes */
  61 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
  62         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  63         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  64                                       .len = 20-1 },
  65         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  66         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  67         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  69         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  72
  73         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  74         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  75         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  76
  77         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  78         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  79
  80         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  81         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  82                                     .len = WLAN_MAX_KEY_LEN },
  83         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  84         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  85         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  86         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  87
  88         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  89         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  90         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  91                                        .len = IEEE80211_MAX_DATA_LEN },
  92         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  93                                        .len = IEEE80211_MAX_DATA_LEN },
  94         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  95         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  96         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  97         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  98                                                .len = NL80211_MAX_SUPP_RATES },
  99         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 100         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 101         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 102         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 103                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 104         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 105
 106         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 107         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 108
 109         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 110         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 111         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 113                                            .len = NL80211_MAX_SUPP_RATES },
 114
 115         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 116
 117         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 118                                          .len = NL80211_HT_CAPABILITY_LEN },
 119
 120         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 121         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 122                               .len = IEEE80211_MAX_DATA_LEN },
 123         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 124         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 125
 126         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 127                                 .len = IEEE80211_MAX_SSID_LEN },
 128         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 129         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 130         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 131         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 132         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 133         [NL80211_ATTR_STA_FLAGS2] = {
 134                 .len = sizeof(struct nl80211_sta_flag_update),
 135         },
 136         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 137         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 138         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 139         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 140         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 141 };
 142
 143 /* policy for the attributes */
 144 static struct nla_policy
 145 nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
 146         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 147         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 148         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 149         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 150         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 151         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 152 };
 153
 154 /* IE validation */
 155 static bool is_valid_ie_attr(const struct nlattr *attr)
 156 {
 157         const u8 *pos;
 158         int len;
 159
 160         if (!attr)
 161                 return true;
 162
 163         pos = nla_data(attr);
 164         len = nla_len(attr);
 165
 166         while (len) {
 167                 u8 elemlen;
 168
 169                 if (len < 2)
 170                         return false;
 171                 len -= 2;
 172
 173                 elemlen = pos[1];
 174                 if (elemlen > len)
 175                         return false;
 176
 177                 len -= elemlen;
 178                 pos += 2 + elemlen;
 179         }
 180
 181         return true;
 182 }
 183
 184 /* message building helper */
 185 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 186                                    int flags, u8 cmd)
 187 {
 188         /* since there is no private header just add the generic one */
 189         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 190 }
 191
 192 static int nl80211_msg_put_channel(struct sk_buff *msg,
 193                                    struct ieee80211_channel *chan)
 194 {
 195         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 196                     chan->center_freq);
 197
 198         if (chan->flags & IEEE80211_CHAN_DISABLED)
 199                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 200         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 201                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 202         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 203                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 204         if (chan->flags & IEEE80211_CHAN_RADAR)
 205                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 206
 207         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 208                     DBM_TO_MBM(chan->max_power));
 209
 210         return 0;
 211
 212  nla_put_failure:
 213         return -ENOBUFS;
 214 }
 215
 216 /* netlink command implementations */
 217
 218 struct key_parse {
 219         struct key_params p;
 220         int idx;
 221         bool def, defmgmt;
 222 };
 223
 224 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 225 {
 226         struct nlattr *tb[NL80211_KEY_MAX + 1];
 227         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 228                                    nl80211_key_policy);
 229         if (err)
 230                 return err;
 231
 232         k->def = !!tb[NL80211_KEY_DEFAULT];
 233         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 234
 235         if (tb[NL80211_KEY_IDX])
 236                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 237
 238         if (tb[NL80211_KEY_DATA]) {
 239                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 240                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 241         }
 242
 243         if (tb[NL80211_KEY_SEQ]) {
 244                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 245                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 246         }
 247
 248         if (tb[NL80211_KEY_CIPHER])
 249                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 250
 251         return 0;
 252 }
 253
 254 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 255 {
 256         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 257                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 258                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 259         }
 260
 261         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 262                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 263                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 264         }
 265
 266         if (info->attrs[NL80211_ATTR_KEY_IDX])
 267                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 268
 269         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 270                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 271
 272         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 273         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 274
 275         return 0;
 276 }
 277
 278 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 279 {
 280         int err;
 281
 282         memset(k, 0, sizeof(*k));
 283         k->idx = -1;
 284
 285         if (info->attrs[NL80211_ATTR_KEY])
 286                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 287         else
 288                 err = nl80211_parse_key_old(info, k);
 289
 290         if (err)
 291                 return err;
 292
 293         if (k->def && k->defmgmt)
 294                 return -EINVAL;
 295
 296         if (k->idx != -1) {
 297                 if (k->defmgmt) {
 298                         if (k->idx < 4 || k->idx > 5)
 299                                 return -EINVAL;
 300                 } else if (k->def) {
 301                         if (k->idx < 0 || k->idx > 3)
 302                                 return -EINVAL;
 303                 } else {
 304                         if (k->idx < 0 || k->idx > 5)
 305                                 return -EINVAL;
 306                 }
 307         }
 308
 309         return 0;
 310 }
 311
 312 static struct cfg80211_cached_keys *
 313 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 314                        struct nlattr *keys)
 315 {
 316         struct key_parse parse;
 317         struct nlattr *key;
 318         struct cfg80211_cached_keys *result;
 319         int rem, err, def = 0;
 320
 321         result = kzalloc(sizeof(*result), GFP_KERNEL);
 322         if (!result)
 323                 return ERR_PTR(-ENOMEM);
 324
 325         result->def = -1;
 326         result->defmgmt = -1;
 327
 328         nla_for_each_nested(key, keys, rem) {
 329                 memset(&parse, 0, sizeof(parse));
 330                 parse.idx = -1;
 331
 332                 err = nl80211_parse_key_new(key, &parse);
 333                 if (err)
 334                         goto error;
 335                 err = -EINVAL;
 336                 if (!parse.p.key)
 337                         goto error;
 338                 if (parse.idx < 0 || parse.idx > 4)
 339                         goto error;
 340                 if (parse.def) {
 341                         if (def)
 342                                 goto error;
 343                         def = 1;
 344                         result->def = parse.idx;
 345                 } else if (parse.defmgmt)
 346                         goto error;
 347                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 348                                                      parse.idx, NULL);
 349                 if (err)
 350                         goto error;
 351                 result->params[parse.idx].cipher = parse.p.cipher;
 352                 result->params[parse.idx].key_len = parse.p.key_len;
 353                 result->params[parse.idx].key = result->data[parse.idx];
 354                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 355         }
 356
 357         return result;
 358  error:
 359         kfree(result);
 360         return ERR_PTR(err);
 361 }
 362
 363 static int nl80211_key_allowed(struct wireless_dev *wdev)
 364 {
 365         ASSERT_WDEV_LOCK(wdev);
 366
 367         if (!netif_running(wdev->netdev))
 368                 return -ENETDOWN;
 369
 370         switch (wdev->iftype) {
 371         case NL80211_IFTYPE_AP:
 372         case NL80211_IFTYPE_AP_VLAN:
 373                 break;
 374         case NL80211_IFTYPE_ADHOC:
 375                 if (!wdev->current_bss)
 376                         return -ENOLINK;
 377                 break;
 378         case NL80211_IFTYPE_STATION:
 379                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 380                         return -ENOLINK;
 381                 break;
 382         default:
 383                 return -EINVAL;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 390                               struct cfg80211_registered_device *dev)
 391 {
 392         void *hdr;
 393         struct nlattr *nl_bands, *nl_band;
 394         struct nlattr *nl_freqs, *nl_freq;
 395         struct nlattr *nl_rates, *nl_rate;
 396         struct nlattr *nl_modes;
 397         struct nlattr *nl_cmds;
 398         enum ieee80211_band band;
 399         struct ieee80211_channel *chan;
 400         struct ieee80211_rate *rate;
 401         int i;
 402         u16 ifmodes = dev->wiphy.interface_modes;
 403
 404         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 405         if (!hdr)
 406                 return -1;
 407
 408         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 409         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 410
 411         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 412                    dev->wiphy.retry_short);
 413         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 414                    dev->wiphy.retry_long);
 415         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 416                     dev->wiphy.frag_threshold);
 417         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 418                     dev->wiphy.rts_threshold);
 419
 420         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 421                    dev->wiphy.max_scan_ssids);
 422         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 423                     dev->wiphy.max_scan_ie_len);
 424
 425         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 426                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 427                 dev->wiphy.cipher_suites);
 428
 429         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 430         if (!nl_modes)
 431                 goto nla_put_failure;
 432
 433         i = 0;
 434         while (ifmodes) {
 435                 if (ifmodes & 1)
 436                         NLA_PUT_FLAG(msg, i);
 437                 ifmodes >>= 1;
 438                 i++;
 439         }
 440
 441         nla_nest_end(msg, nl_modes);
 442
 443         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 444         if (!nl_bands)
 445                 goto nla_put_failure;
 446
 447         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 448                 if (!dev->wiphy.bands[band])
 449                         continue;
 450
 451                 nl_band = nla_nest_start(msg, band);
 452                 if (!nl_band)
 453                         goto nla_put_failure;
 454
 455                 /* add HT info */
 456                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 457                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 458                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 459                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 460                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 461                                 dev->wiphy.bands[band]->ht_cap.cap);
 462                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 463                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 464                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 465                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 466                 }
 467
 468                 /* add frequencies */
 469                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 470                 if (!nl_freqs)
 471                         goto nla_put_failure;
 472
 473                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 474                         nl_freq = nla_nest_start(msg, i);
 475                         if (!nl_freq)
 476                                 goto nla_put_failure;
 477
 478                         chan = &dev->wiphy.bands[band]->channels[i];
 479
 480                         if (nl80211_msg_put_channel(msg, chan))
 481                                 goto nla_put_failure;
 482
 483                         nla_nest_end(msg, nl_freq);
 484                 }
 485
 486                 nla_nest_end(msg, nl_freqs);
 487
 488                 /* add bitrates */
 489                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 490                 if (!nl_rates)
 491                         goto nla_put_failure;
 492
 493                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 494                         nl_rate = nla_nest_start(msg, i);
 495                         if (!nl_rate)
 496                                 goto nla_put_failure;
 497
 498                         rate = &dev->wiphy.bands[band]->bitrates[i];
 499                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 500                                     rate->bitrate);
 501                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 502                                 NLA_PUT_FLAG(msg,
 503                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 504
 505                         nla_nest_end(msg, nl_rate);
 506                 }
 507
 508                 nla_nest_end(msg, nl_rates);
 509
 510                 nla_nest_end(msg, nl_band);
 511         }
 512         nla_nest_end(msg, nl_bands);
 513
 514         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 515         if (!nl_cmds)
 516                 goto nla_put_failure;
 517
 518         i = 0;
 519 #define CMD(op, n)                                              \
 520          do {                                                   \
 521                 if (dev->ops->op) {                             \
 522                         i++;                                    \
 523                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 524                 }                                               \
 525         } while (0)
 526
 527         CMD(add_virtual_intf, NEW_INTERFACE);
 528         CMD(change_virtual_intf, SET_INTERFACE);
 529         CMD(add_key, NEW_KEY);
 530         CMD(add_beacon, NEW_BEACON);
 531         CMD(add_station, NEW_STATION);
 532         CMD(add_mpath, NEW_MPATH);
 533         CMD(set_mesh_params, SET_MESH_PARAMS);
 534         CMD(change_bss, SET_BSS);
 535         CMD(auth, AUTHENTICATE);
 536         CMD(assoc, ASSOCIATE);
 537         CMD(deauth, DEAUTHENTICATE);
 538         CMD(disassoc, DISASSOCIATE);
 539         CMD(join_ibss, JOIN_IBSS);
 540         if (dev->wiphy.netnsok) {
 541                 i++;
 542                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 543         }
 544
 545 #undef CMD
 546
 547         if (dev->ops->connect || dev->ops->auth) {
 548                 i++;
 549                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 550         }
 551
 552         if (dev->ops->disconnect || dev->ops->deauth) {
 553                 i++;
 554                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 555         }
 556
 557         nla_nest_end(msg, nl_cmds);
 558
 559         return genlmsg_end(msg, hdr);
 560
 561  nla_put_failure:
 562         genlmsg_cancel(msg, hdr);
 563         return -EMSGSIZE;
 564 }
 565
 566 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 567 {
 568         int idx = 0;
 569         int start = cb->args[0];
 570         struct cfg80211_registered_device *dev;
 571
 572         mutex_lock(&cfg80211_mutex);
 573         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 574                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 575                         continue;
 576                 if (++idx <= start)
 577                         continue;
 578                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 579                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 580                                        dev) < 0) {
 581                         idx--;
 582                         break;
 583                 }
 584         }
 585         mutex_unlock(&cfg80211_mutex);
 586
 587         cb->args[0] = idx;
 588
 589         return skb->len;
 590 }
 591
 592 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 593 {
 594         struct sk_buff *msg;
 595         struct cfg80211_registered_device *dev;
 596
 597         dev = cfg80211_get_dev_from_info(info);
 598         if (IS_ERR(dev))
 599                 return PTR_ERR(dev);
 600
 601         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 602         if (!msg)
 603                 goto out_err;
 604
 605         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 606                 goto out_free;
 607
 608         cfg80211_unlock_rdev(dev);
 609
 610         return genlmsg_reply(msg, info);
 611
 612  out_free:
 613         nlmsg_free(msg);
 614  out_err:
 615         cfg80211_unlock_rdev(dev);
 616         return -ENOBUFS;
 617 }
 618
 619 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 620         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 621         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 622         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 623         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 624         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 625 };
 626
 627 static int parse_txq_params(struct nlattr *tb[],
 628                             struct ieee80211_txq_params *txq_params)
 629 {
 630         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 631             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 632             !tb[NL80211_TXQ_ATTR_AIFS])
 633                 return -EINVAL;
 634
 635         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 636         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 637         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 638         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 639         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 640
 641         return 0;
 642 }
 643
 644 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 645 {
 646         struct cfg80211_registered_device *rdev;
 647         int result = 0, rem_txq_params = 0;
 648         struct nlattr *nl_txq_params;
 649         u32 changed;
 650         u8 retry_short = 0, retry_long = 0;
 651         u32 frag_threshold = 0, rts_threshold = 0;
 652
 653         rtnl_lock();
 654
 655         mutex_lock(&cfg80211_mutex);
 656
 657         rdev = __cfg80211_rdev_from_info(info);
 658         if (IS_ERR(rdev)) {
 659                 mutex_unlock(&cfg80211_mutex);
 660                 result = PTR_ERR(rdev);
 661                 goto unlock;
 662         }
 663
 664         mutex_lock(&rdev->mtx);
 665
 666         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 667                 result = cfg80211_dev_rename(
 668                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 669
 670         mutex_unlock(&cfg80211_mutex);
 671
 672         if (result)
 673                 goto bad_res;
 674
 675         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 676                 struct ieee80211_txq_params txq_params;
 677                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 678
 679                 if (!rdev->ops->set_txq_params) {
 680                         result = -EOPNOTSUPP;
 681                         goto bad_res;
 682                 }
 683
 684                 nla_for_each_nested(nl_txq_params,
 685                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 686                                     rem_txq_params) {
 687                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 688                                   nla_data(nl_txq_params),
 689                                   nla_len(nl_txq_params),
 690                                   txq_params_policy);
 691                         result = parse_txq_params(tb, &txq_params);
 692                         if (result)
 693                                 goto bad_res;
 694
 695                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 696                                                            &txq_params);
 697                         if (result)
 698                                 goto bad_res;
 699                 }
 700         }
 701
 702         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 703                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 704                 struct ieee80211_channel *chan;
 705                 struct ieee80211_sta_ht_cap *ht_cap;
 706                 u32 freq;
 707
 708                 if (!rdev->ops->set_channel) {
 709                         result = -EOPNOTSUPP;
 710                         goto bad_res;
 711                 }
 712
 713                 result = -EINVAL;
 714
 715                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 716                         channel_type = nla_get_u32(info->attrs[
 717                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 718                         if (channel_type != NL80211_CHAN_NO_HT &&
 719                             channel_type != NL80211_CHAN_HT20 &&
 720                             channel_type != NL80211_CHAN_HT40PLUS &&
 721                             channel_type != NL80211_CHAN_HT40MINUS)
 722                                 goto bad_res;
 723                 }
 724
 725                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 726                 chan = ieee80211_get_channel(&rdev->wiphy, freq);
 727
 728                 /* Primary channel not allowed */
 729                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 730                         goto bad_res;
 731
 732                 if (channel_type == NL80211_CHAN_HT40MINUS &&
 733                     (chan->flags & IEEE80211_CHAN_NO_HT40MINUS))
 734                         goto bad_res;
 735                 else if (channel_type == NL80211_CHAN_HT40PLUS &&
 736                          (chan->flags & IEEE80211_CHAN_NO_HT40PLUS))
 737                         goto bad_res;
 738
 739                 /*
 740                  * At this point we know if that if HT40 was requested
 741                  * we are allowed to use it and the extension channel
 742                  * exists.
 743                  */
 744
 745                 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
 746
 747                 /* no HT capabilities or intolerant */
 748                 if (channel_type != NL80211_CHAN_NO_HT) {
 749                         if (!ht_cap->ht_supported)
 750                                 goto bad_res;
 751                         if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
 752                             (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
 753                                 goto bad_res;
 754                 }
 755
 756                 result = rdev->ops->set_channel(&rdev->wiphy, chan,
 757                                                 channel_type);
 758                 if (result)
 759                         goto bad_res;
 760
 761                 rdev->channel = chan;
 762         }
 763
 764         changed = 0;
 765
 766         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 767                 retry_short = nla_get_u8(
 768                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 769                 if (retry_short == 0) {
 770                         result = -EINVAL;
 771                         goto bad_res;
 772                 }
 773                 changed |= WIPHY_PARAM_RETRY_SHORT;
 774         }
 775
 776         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 777                 retry_long = nla_get_u8(
 778                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 779                 if (retry_long == 0) {
 780                         result = -EINVAL;
 781                         goto bad_res;
 782                 }
 783                 changed |= WIPHY_PARAM_RETRY_LONG;
 784         }
 785
 786         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 787                 frag_threshold = nla_get_u32(
 788                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 789                 if (frag_threshold < 256) {
 790                         result = -EINVAL;
 791                         goto bad_res;
 792                 }
 793                 if (frag_threshold != (u32) -1) {
 794                         /*
 795                          * Fragments (apart from the last one) are required to
 796                          * have even length. Make the fragmentation code
 797                          * simpler by stripping LSB should someone try to use
 798                          * odd threshold value.
 799                          */
 800                         frag_threshold &= ~0x1;
 801                 }
 802                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 803         }
 804
 805         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 806                 rts_threshold = nla_get_u32(
 807                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 808                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 809         }
 810
 811         if (changed) {
 812                 u8 old_retry_short, old_retry_long;
 813                 u32 old_frag_threshold, old_rts_threshold;
 814
 815                 if (!rdev->ops->set_wiphy_params) {
 816                         result = -EOPNOTSUPP;
 817                         goto bad_res;
 818                 }
 819
 820                 old_retry_short = rdev->wiphy.retry_short;
 821                 old_retry_long = rdev->wiphy.retry_long;
 822                 old_frag_threshold = rdev->wiphy.frag_threshold;
 823                 old_rts_threshold = rdev->wiphy.rts_threshold;
 824
 825                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 826                         rdev->wiphy.retry_short = retry_short;
 827                 if (changed & WIPHY_PARAM_RETRY_LONG)
 828                         rdev->wiphy.retry_long = retry_long;
 829                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 830                         rdev->wiphy.frag_threshold = frag_threshold;
 831                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 832                         rdev->wiphy.rts_threshold = rts_threshold;
 833
 834                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 835                 if (result) {
 836                         rdev->wiphy.retry_short = old_retry_short;
 837                         rdev->wiphy.retry_long = old_retry_long;
 838                         rdev->wiphy.frag_threshold = old_frag_threshold;
 839                         rdev->wiphy.rts_threshold = old_rts_threshold;
 840                 }
 841         }
 842
 843  bad_res:
 844         mutex_unlock(&rdev->mtx);
 845  unlock:
 846         rtnl_unlock();
 847         return result;
 848 }
 849
 850
 851 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 852                               struct cfg80211_registered_device *rdev,
 853                               struct net_device *dev)
 854 {
 855         void *hdr;
 856
 857         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 858         if (!hdr)
 859                 return -1;
 860
 861         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 862         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 863         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 864         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 865         return genlmsg_end(msg, hdr);
 866
 867  nla_put_failure:
 868         genlmsg_cancel(msg, hdr);
 869         return -EMSGSIZE;
 870 }
 871
 872 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 873 {
 874         int wp_idx = 0;
 875         int if_idx = 0;
 876         int wp_start = cb->args[0];
 877         int if_start = cb->args[1];
 878         struct cfg80211_registered_device *dev;
 879         struct wireless_dev *wdev;
 880
 881         mutex_lock(&cfg80211_mutex);
 882         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 883                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 884                         continue;
 885                 if (wp_idx < wp_start) {
 886                         wp_idx++;
 887                         continue;
 888                 }
 889                 if_idx = 0;
 890
 891                 mutex_lock(&dev->devlist_mtx);
 892                 list_for_each_entry(wdev, &dev->netdev_list, list) {
 893                         if (if_idx < if_start) {
 894                                 if_idx++;
 895                                 continue;
 896                         }
 897                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 898                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 899                                                dev, wdev->netdev) < 0) {
 900                                 mutex_unlock(&dev->devlist_mtx);
 901                                 goto out;
 902                         }
 903                         if_idx++;
 904                 }
 905                 mutex_unlock(&dev->devlist_mtx);
 906
 907                 wp_idx++;
 908         }
 909  out:
 910         mutex_unlock(&cfg80211_mutex);
 911
 912         cb->args[0] = wp_idx;
 913         cb->args[1] = if_idx;
 914
 915         return skb->len;
 916 }
 917
 918 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 919 {
 920         struct sk_buff *msg;
 921         struct cfg80211_registered_device *dev;
 922         struct net_device *netdev;
 923         int err;
 924
 925         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
 926         if (err)
 927                 return err;
 928
 929         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 930         if (!msg)
 931                 goto out_err;
 932
 933         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
 934                                dev, netdev) < 0)
 935                 goto out_free;
 936
 937         dev_put(netdev);
 938         cfg80211_unlock_rdev(dev);
 939
 940         return genlmsg_reply(msg, info);
 941
 942  out_free:
 943         nlmsg_free(msg);
 944  out_err:
 945         dev_put(netdev);
 946         cfg80211_unlock_rdev(dev);
 947         return -ENOBUFS;
 948 }
 949
 950 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 951         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 952         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 953         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 954         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 955         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 956 };
 957
 958 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 959 {
 960         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 961         int flag;
 962
 963         *mntrflags = 0;
 964
 965         if (!nla)
 966                 return -EINVAL;
 967
 968         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 969                              nla, mntr_flags_policy))
 970                 return -EINVAL;
 971
 972         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 973                 if (flags[flag])
 974                         *mntrflags |= (1<<flag);
 975
 976         return 0;
 977 }
 978
 979 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 980 {
 981         struct cfg80211_registered_device *rdev;
 982         struct vif_params params;
 983         int err;
 984         enum nl80211_iftype otype, ntype;
 985         struct net_device *dev;
 986         u32 _flags, *flags = NULL;
 987         bool change = false;
 988
 989         memset(&params, 0, sizeof(params));
 990
 991         rtnl_lock();
 992
 993         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
 994         if (err)
 995                 goto unlock_rtnl;
 996
 997         otype = ntype = dev->ieee80211_ptr->iftype;
 998
 999         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1000                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1001                 if (otype != ntype)
1002                         change = true;
1003                 if (ntype > NL80211_IFTYPE_MAX) {
1004                         err = -EINVAL;
1005                         goto unlock;
1006                 }
1007         }
1008
1009         if (!rdev->ops->change_virtual_intf ||
1010             !(rdev->wiphy.interface_modes & (1 << ntype))) {
1011                 err = -EOPNOTSUPP;
1012                 goto unlock;
1013         }
1014
1015         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1016                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1017                         err = -EINVAL;
1018                         goto unlock;
1019                 }
1020                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1021                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1022                 change = true;
1023         }
1024
1025         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1026                 if (ntype != NL80211_IFTYPE_MONITOR) {
1027                         err = -EINVAL;
1028                         goto unlock;
1029                 }
1030                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1031                                           &_flags);
1032                 if (err)
1033                         goto unlock;
1034
1035                 flags = &_flags;
1036                 change = true;
1037         }
1038
1039         if (change)
1040                 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev,
1041                                                     ntype, flags, &params);
1042         else
1043                 err = 0;
1044
1045         WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
1046
1047         if (!err && (ntype != otype)) {
1048                 if (otype == NL80211_IFTYPE_ADHOC)
1049                         cfg80211_clear_ibss(dev, false);
1050         }
1051
1052  unlock:
1053         dev_put(dev);
1054         cfg80211_unlock_rdev(rdev);
1055  unlock_rtnl:
1056         rtnl_unlock();
1057         return err;
1058 }
1059
1060 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1061 {
1062         struct cfg80211_registered_device *rdev;
1063         struct vif_params params;
1064         int err;
1065         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1066         u32 flags;
1067
1068         memset(&params, 0, sizeof(params));
1069
1070         if (!info->attrs[NL80211_ATTR_IFNAME])
1071                 return -EINVAL;
1072
1073         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1074                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1075                 if (type > NL80211_IFTYPE_MAX)
1076                         return -EINVAL;
1077         }
1078
1079         rtnl_lock();
1080
1081         rdev = cfg80211_get_dev_from_info(info);
1082         if (IS_ERR(rdev)) {
1083                 err = PTR_ERR(rdev);
1084                 goto unlock_rtnl;
1085         }
1086
1087         if (!rdev->ops->add_virtual_intf ||
1088             !(rdev->wiphy.interface_modes & (1 << type))) {
1089                 err = -EOPNOTSUPP;
1090                 goto unlock;
1091         }
1092
1093         if (type == NL80211_IFTYPE_MESH_POINT &&
1094             info->attrs[NL80211_ATTR_MESH_ID]) {
1095                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1096                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1097         }
1098
1099         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1100                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1101                                   &flags);
1102         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1103                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1104                 type, err ? NULL : &flags, &params);
1105
1106  unlock:
1107         cfg80211_unlock_rdev(rdev);
1108  unlock_rtnl:
1109         rtnl_unlock();
1110         return err;
1111 }
1112
1113 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1114 {
1115         struct cfg80211_registered_device *rdev;
1116         int err;
1117         struct net_device *dev;
1118
1119         rtnl_lock();
1120
1121         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1122         if (err)
1123                 goto unlock_rtnl;
1124
1125         if (!rdev->ops->del_virtual_intf) {
1126                 err = -EOPNOTSUPP;
1127                 goto out;
1128         }
1129
1130         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1131
1132  out:
1133         cfg80211_unlock_rdev(rdev);
1134         dev_put(dev);
1135  unlock_rtnl:
1136         rtnl_unlock();
1137         return err;
1138 }
1139
1140 struct get_key_cookie {
1141         struct sk_buff *msg;
1142         int error;
1143         int idx;
1144 };
1145
1146 static void get_key_callback(void *c, struct key_params *params)
1147 {
1148         struct nlattr *key;
1149         struct get_key_cookie *cookie = c;
1150
1151         if (params->key)
1152                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1153                         params->key_len, params->key);
1154
1155         if (params->seq)
1156                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1157                         params->seq_len, params->seq);
1158
1159         if (params->cipher)
1160                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1161                             params->cipher);
1162
1163         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1164         if (!key)
1165                 goto nla_put_failure;
1166
1167         if (params->key)
1168                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1169                         params->key_len, params->key);
1170
1171         if (params->seq)
1172                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1173                         params->seq_len, params->seq);
1174
1175         if (params->cipher)
1176                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1177                             params->cipher);
1178
1179         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1180
1181         nla_nest_end(cookie->msg, key);
1182
1183         return;
1184  nla_put_failure:
1185         cookie->error = 1;
1186 }
1187
1188 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1189 {
1190         struct cfg80211_registered_device *rdev;
1191         int err;
1192         struct net_device *dev;
1193         u8 key_idx = 0;
1194         u8 *mac_addr = NULL;
1195         struct get_key_cookie cookie = {
1196                 .error = 0,
1197         };
1198         void *hdr;
1199         struct sk_buff *msg;
1200
1201         if (info->attrs[NL80211_ATTR_KEY_IDX])
1202                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1203
1204         if (key_idx > 5)
1205                 return -EINVAL;
1206
1207         if (info->attrs[NL80211_ATTR_MAC])
1208                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1209
1210         rtnl_lock();
1211
1212         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1213         if (err)
1214                 goto unlock_rtnl;
1215
1216         if (!rdev->ops->get_key) {
1217                 err = -EOPNOTSUPP;
1218                 goto out;
1219         }
1220
1221         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1222         if (!msg) {
1223                 err = -ENOMEM;
1224                 goto out;
1225         }
1226
1227         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1228                              NL80211_CMD_NEW_KEY);
1229
1230         if (IS_ERR(hdr)) {
1231                 err = PTR_ERR(hdr);
1232                 goto free_msg;
1233         }
1234
1235         cookie.msg = msg;
1236         cookie.idx = key_idx;
1237
1238         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1239         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1240         if (mac_addr)
1241                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1242
1243         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1244                                 &cookie, get_key_callback);
1245
1246         if (err)
1247                 goto free_msg;
1248
1249         if (cookie.error)
1250                 goto nla_put_failure;
1251
1252         genlmsg_end(msg, hdr);
1253         err = genlmsg_reply(msg, info);
1254         goto out;
1255
1256  nla_put_failure:
1257         err = -ENOBUFS;
1258  free_msg:
1259         nlmsg_free(msg);
1260  out:
1261         cfg80211_unlock_rdev(rdev);
1262         dev_put(dev);
1263  unlock_rtnl:
1264         rtnl_unlock();
1265
1266         return err;
1267 }
1268
1269 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1270 {
1271         struct cfg80211_registered_device *rdev;
1272         struct key_parse key;
1273         int err;
1274         struct net_device *dev;
1275         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1276                     u8 key_index);
1277
1278         err = nl80211_parse_key(info, &key);
1279         if (err)
1280                 return err;
1281
1282         if (key.idx < 0)
1283                 return -EINVAL;
1284
1285         /* only support setting default key */
1286         if (!key.def && !key.defmgmt)
1287                 return -EINVAL;
1288
1289         rtnl_lock();
1290
1291         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1292         if (err)
1293                 goto unlock_rtnl;
1294
1295         if (key.def)
1296                 func = rdev->ops->set_default_key;
1297         else
1298                 func = rdev->ops->set_default_mgmt_key;
1299
1300         if (!func) {
1301                 err = -EOPNOTSUPP;
1302                 goto out;
1303         }
1304
1305         wdev_lock(dev->ieee80211_ptr);
1306         err = nl80211_key_allowed(dev->ieee80211_ptr);
1307         if (!err)
1308                 err = func(&rdev->wiphy, dev, key.idx);
1309
1310 #ifdef CONFIG_WIRELESS_EXT
1311         if (!err) {
1312                 if (func == rdev->ops->set_default_key)
1313                         dev->ieee80211_ptr->wext.default_key = key.idx;
1314                 else
1315                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1316         }
1317 #endif
1318         wdev_unlock(dev->ieee80211_ptr);
1319
1320  out:
1321         cfg80211_unlock_rdev(rdev);
1322         dev_put(dev);
1323
1324  unlock_rtnl:
1325         rtnl_unlock();
1326
1327         return err;
1328 }
1329
1330 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1331 {
1332         struct cfg80211_registered_device *rdev;
1333         int err;
1334         struct net_device *dev;
1335         struct key_parse key;
1336         u8 *mac_addr = NULL;
1337
1338         err = nl80211_parse_key(info, &key);
1339         if (err)
1340                 return err;
1341
1342         if (!key.p.key)
1343                 return -EINVAL;
1344
1345         if (info->attrs[NL80211_ATTR_MAC])
1346                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1347
1348         rtnl_lock();
1349
1350         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1351         if (err)
1352                 goto unlock_rtnl;
1353
1354         if (!rdev->ops->add_key) {
1355                 err = -EOPNOTSUPP;
1356                 goto out;
1357         }
1358
1359         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1360                 err = -EINVAL;
1361                 goto out;
1362         }
1363
1364         wdev_lock(dev->ieee80211_ptr);
1365         err = nl80211_key_allowed(dev->ieee80211_ptr);
1366         if (!err)
1367                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1368                                          mac_addr, &key.p);
1369         wdev_unlock(dev->ieee80211_ptr);
1370
1371  out:
1372         cfg80211_unlock_rdev(rdev);
1373         dev_put(dev);
1374  unlock_rtnl:
1375         rtnl_unlock();
1376
1377         return err;
1378 }
1379
1380 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1381 {
1382         struct cfg80211_registered_device *rdev;
1383         int err;
1384         struct net_device *dev;
1385         u8 *mac_addr = NULL;
1386         struct key_parse key;
1387
1388         err = nl80211_parse_key(info, &key);
1389         if (err)
1390                 return err;
1391
1392         if (info->attrs[NL80211_ATTR_MAC])
1393                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1394
1395         rtnl_lock();
1396
1397         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1398         if (err)
1399                 goto unlock_rtnl;
1400
1401         if (!rdev->ops->del_key) {
1402                 err = -EOPNOTSUPP;
1403                 goto out;
1404         }
1405
1406         wdev_lock(dev->ieee80211_ptr);
1407         err = nl80211_key_allowed(dev->ieee80211_ptr);
1408         if (!err)
1409                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1410
1411 #ifdef CONFIG_WIRELESS_EXT
1412         if (!err) {
1413                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1414                         dev->ieee80211_ptr->wext.default_key = -1;
1415                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1416                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1417         }
1418 #endif
1419         wdev_unlock(dev->ieee80211_ptr);
1420
1421  out:
1422         cfg80211_unlock_rdev(rdev);
1423         dev_put(dev);
1424
1425  unlock_rtnl:
1426         rtnl_unlock();
1427
1428         return err;
1429 }
1430
1431 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1432 {
1433         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1434                     struct beacon_parameters *info);
1435         struct cfg80211_registered_device *rdev;
1436         int err;
1437         struct net_device *dev;
1438         struct beacon_parameters params;
1439         int haveinfo = 0;
1440
1441         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1442                 return -EINVAL;
1443
1444         rtnl_lock();
1445
1446         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1447         if (err)
1448                 goto unlock_rtnl;
1449
1450         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1451                 err = -EOPNOTSUPP;
1452                 goto out;
1453         }
1454
1455         switch (info->genlhdr->cmd) {
1456         case NL80211_CMD_NEW_BEACON:
1457                 /* these are required for NEW_BEACON */
1458                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1459                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1460                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1461                         err = -EINVAL;
1462                         goto out;
1463                 }
1464
1465                 call = rdev->ops->add_beacon;
1466                 break;
1467         case NL80211_CMD_SET_BEACON:
1468                 call = rdev->ops->set_beacon;
1469                 break;
1470         default:
1471                 WARN_ON(1);
1472                 err = -EOPNOTSUPP;
1473                 goto out;
1474         }
1475
1476         if (!call) {
1477                 err = -EOPNOTSUPP;
1478                 goto out;
1479         }
1480
1481         memset(&params, 0, sizeof(params));
1482
1483         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1484                 params.interval =
1485                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1486                 haveinfo = 1;
1487         }
1488
1489         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1490                 params.dtim_period =
1491                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1492                 haveinfo = 1;
1493         }
1494
1495         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1496                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1497                 params.head_len =
1498                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1499                 haveinfo = 1;
1500         }
1501
1502         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1503                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1504                 params.tail_len =
1505                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1506                 haveinfo = 1;
1507         }
1508
1509         if (!haveinfo) {
1510                 err = -EINVAL;
1511                 goto out;
1512         }
1513
1514         err = call(&rdev->wiphy, dev, &params);
1515
1516  out:
1517         cfg80211_unlock_rdev(rdev);
1518         dev_put(dev);
1519  unlock_rtnl:
1520         rtnl_unlock();
1521
1522         return err;
1523 }
1524
1525 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1526 {
1527         struct cfg80211_registered_device *rdev;
1528         int err;
1529         struct net_device *dev;
1530
1531         rtnl_lock();
1532
1533         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1534         if (err)
1535                 goto unlock_rtnl;
1536
1537         if (!rdev->ops->del_beacon) {
1538                 err = -EOPNOTSUPP;
1539                 goto out;
1540         }
1541
1542         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1543                 err = -EOPNOTSUPP;
1544                 goto out;
1545         }
1546         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1547
1548  out:
1549         cfg80211_unlock_rdev(rdev);
1550         dev_put(dev);
1551  unlock_rtnl:
1552         rtnl_unlock();
1553
1554         return err;
1555 }
1556
1557 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1558         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1559         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1560         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1561         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1562 };
1563
1564 static int parse_station_flags(struct genl_info *info,
1565                                struct station_parameters *params)
1566 {
1567         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1568         struct nlattr *nla;
1569         int flag;
1570
1571         /*
1572          * Try parsing the new attribute first so userspace
1573          * can specify both for older kernels.
1574          */
1575         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1576         if (nla) {
1577                 struct nl80211_sta_flag_update *sta_flags;
1578
1579                 sta_flags = nla_data(nla);
1580                 params->sta_flags_mask = sta_flags->mask;
1581                 params->sta_flags_set = sta_flags->set;
1582                 if ((params->sta_flags_mask |
1583                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1584                         return -EINVAL;
1585                 return 0;
1586         }
1587
1588         /* if present, parse the old attribute */
1589
1590         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1591         if (!nla)
1592                 return 0;
1593
1594         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1595                              nla, sta_flags_policy))
1596                 return -EINVAL;
1597
1598         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1599         params->sta_flags_mask &= ~1;
1600
1601         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1602                 if (flags[flag])
1603                         params->sta_flags_set |= (1<<flag);
1604
1605         return 0;
1606 }
1607
1608 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1609 {
1610         int modulation, streams, bitrate;
1611
1612         if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1613                 return rate->legacy;
1614
1615         /* the formula below does only work for MCS values smaller than 32 */
1616         if (rate->mcs >= 32)
1617                 return 0;
1618
1619         modulation = rate->mcs & 7;
1620         streams = (rate->mcs >> 3) + 1;
1621
1622         bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1623                         13500000 : 6500000;
1624
1625         if (modulation < 4)
1626                 bitrate *= (modulation + 1);
1627         else if (modulation == 4)
1628                 bitrate *= (modulation + 2);
1629         else
1630                 bitrate *= (modulation + 3);
1631
1632         bitrate *= streams;
1633
1634         if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1635                 bitrate = (bitrate / 9) * 10;
1636
1637         /* do NOT round down here */
1638         return (bitrate + 50000) / 100000;
1639 }
1640
1641 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1642                                 int flags, struct net_device *dev,
1643                                 u8 *mac_addr, struct station_info *sinfo)
1644 {
1645         void *hdr;
1646         struct nlattr *sinfoattr, *txrate;
1647         u16 bitrate;
1648
1649         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1650         if (!hdr)
1651                 return -1;
1652
1653         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1654         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1655
1656         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1657         if (!sinfoattr)
1658                 goto nla_put_failure;
1659         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1660                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1661                             sinfo->inactive_time);
1662         if (sinfo->filled & STATION_INFO_RX_BYTES)
1663                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1664                             sinfo->rx_bytes);
1665         if (sinfo->filled & STATION_INFO_TX_BYTES)
1666                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1667                             sinfo->tx_bytes);
1668         if (sinfo->filled & STATION_INFO_LLID)
1669                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1670                             sinfo->llid);
1671         if (sinfo->filled & STATION_INFO_PLID)
1672                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1673                             sinfo->plid);
1674         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1675                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1676                             sinfo->plink_state);
1677         if (sinfo->filled & STATION_INFO_SIGNAL)
1678                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1679                            sinfo->signal);
1680         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1681                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1682                 if (!txrate)
1683                         goto nla_put_failure;
1684
1685                 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1686                 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1687                 if (bitrate > 0)
1688                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1689
1690                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1691                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1692                                     sinfo->txrate.mcs);
1693                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1694                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1695                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1696                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1697
1698                 nla_nest_end(msg, txrate);
1699         }
1700         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1701                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1702                             sinfo->rx_packets);
1703         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1704                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1705                             sinfo->tx_packets);
1706         nla_nest_end(msg, sinfoattr);
1707
1708         return genlmsg_end(msg, hdr);
1709
1710  nla_put_failure:
1711         genlmsg_cancel(msg, hdr);
1712         return -EMSGSIZE;
1713 }
1714
1715 static int nl80211_dump_station(struct sk_buff *skb,
1716                                 struct netlink_callback *cb)
1717 {
1718         struct station_info sinfo;
1719         struct cfg80211_registered_device *dev;
1720         struct net_device *netdev;
1721         u8 mac_addr[ETH_ALEN];
1722         int ifidx = cb->args[0];
1723         int sta_idx = cb->args[1];
1724         int err;
1725
1726         if (!ifidx) {
1727                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1728                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1729                                   nl80211_policy);
1730                 if (err)
1731                         return err;
1732
1733                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1734                         return -EINVAL;
1735
1736                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1737                 if (!ifidx)
1738                         return -EINVAL;
1739         }
1740
1741         rtnl_lock();
1742
1743         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1744         if (!netdev) {
1745                 err = -ENODEV;
1746                 goto out_rtnl;
1747         }
1748
1749         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1750         if (IS_ERR(dev)) {
1751                 err = PTR_ERR(dev);
1752                 goto out_rtnl;
1753         }
1754
1755         if (!dev->ops->dump_station) {
1756                 err = -EOPNOTSUPP;
1757                 goto out_err;
1758         }
1759
1760         while (1) {
1761                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1762                                              mac_addr, &sinfo);
1763                 if (err == -ENOENT)
1764                         break;
1765                 if (err)
1766                         goto out_err;
1767
1768                 if (nl80211_send_station(skb,
1769                                 NETLINK_CB(cb->skb).pid,
1770                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1771                                 netdev, mac_addr,
1772                                 &sinfo) < 0)
1773                         goto out;
1774
1775                 sta_idx++;
1776         }
1777
1778
1779  out:
1780         cb->args[1] = sta_idx;
1781         err = skb->len;
1782  out_err:
1783         cfg80211_unlock_rdev(dev);
1784  out_rtnl:
1785         rtnl_unlock();
1786
1787         return err;
1788 }
1789
1790 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1791 {
1792         struct cfg80211_registered_device *rdev;
1793         int err;
1794         struct net_device *dev;
1795         struct station_info sinfo;
1796         struct sk_buff *msg;
1797         u8 *mac_addr = NULL;
1798
1799         memset(&sinfo, 0, sizeof(sinfo));
1800
1801         if (!info->attrs[NL80211_ATTR_MAC])
1802                 return -EINVAL;
1803
1804         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1805
1806         rtnl_lock();
1807
1808         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1809         if (err)
1810                 goto out_rtnl;
1811
1812         if (!rdev->ops->get_station) {
1813                 err = -EOPNOTSUPP;
1814                 goto out;
1815         }
1816
1817         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1818         if (err)
1819                 goto out;
1820
1821         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1822         if (!msg)
1823                 goto out;
1824
1825         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1826                                  dev, mac_addr, &sinfo) < 0)
1827                 goto out_free;
1828
1829         err = genlmsg_reply(msg, info);
1830         goto out;
1831
1832  out_free:
1833         nlmsg_free(msg);
1834  out:
1835         cfg80211_unlock_rdev(rdev);
1836         dev_put(dev);
1837  out_rtnl:
1838         rtnl_unlock();
1839
1840         return err;
1841 }
1842
1843 /*
1844  * Get vlan interface making sure it is on the right wiphy.
1845  */
1846 static int get_vlan(struct genl_info *info,
1847                     struct cfg80211_registered_device *rdev,
1848                     struct net_device **vlan)
1849 {
1850         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1851         *vlan = NULL;
1852
1853         if (vlanattr) {
1854                 *vlan = dev_get_by_index(genl_info_net(info),
1855                                          nla_get_u32(vlanattr));
1856                 if (!*vlan)
1857                         return -ENODEV;
1858                 if (!(*vlan)->ieee80211_ptr)
1859                         return -EINVAL;
1860                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1861                         return -EINVAL;
1862         }
1863         return 0;
1864 }
1865
1866 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1867 {
1868         struct cfg80211_registered_device *rdev;
1869         int err;
1870         struct net_device *dev;
1871         struct station_parameters params;
1872         u8 *mac_addr = NULL;
1873
1874         memset(&params, 0, sizeof(params));
1875
1876         params.listen_interval = -1;
1877
1878         if (info->attrs[NL80211_ATTR_STA_AID])
1879                 return -EINVAL;
1880
1881         if (!info->attrs[NL80211_ATTR_MAC])
1882                 return -EINVAL;
1883
1884         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1885
1886         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1887                 params.supported_rates =
1888                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1889                 params.supported_rates_len =
1890                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1891         }
1892
1893         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1894                 params.listen_interval =
1895                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1896
1897         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1898                 params.ht_capa =
1899                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1900
1901         if (parse_station_flags(info, &params))
1902                 return -EINVAL;
1903
1904         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1905                 params.plink_action =
1906                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1907
1908         rtnl_lock();
1909
1910         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1911         if (err)
1912                 goto out_rtnl;
1913
1914         err = get_vlan(info, rdev, &params.vlan);
1915         if (err)
1916                 goto out;
1917
1918         /* validate settings */
1919         err = 0;
1920
1921         switch (dev->ieee80211_ptr->iftype) {
1922         case NL80211_IFTYPE_AP:
1923         case NL80211_IFTYPE_AP_VLAN:
1924                 /* disallow mesh-specific things */
1925                 if (params.plink_action)
1926                         err = -EINVAL;
1927                 break;
1928         case NL80211_IFTYPE_STATION:
1929                 /* disallow everything but AUTHORIZED flag */
1930                 if (params.plink_action)
1931                         err = -EINVAL;
1932                 if (params.vlan)
1933                         err = -EINVAL;
1934                 if (params.supported_rates)
1935                         err = -EINVAL;
1936                 if (params.ht_capa)
1937                         err = -EINVAL;
1938                 if (params.listen_interval >= 0)
1939                         err = -EINVAL;
1940                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1941                         err = -EINVAL;
1942                 break;
1943         case NL80211_IFTYPE_MESH_POINT:
1944                 /* disallow things mesh doesn't support */
1945                 if (params.vlan)
1946                         err = -EINVAL;
1947                 if (params.ht_capa)
1948                         err = -EINVAL;
1949                 if (params.listen_interval >= 0)
1950                         err = -EINVAL;
1951                 if (params.supported_rates)
1952                         err = -EINVAL;
1953                 if (params.sta_flags_mask)
1954                         err = -EINVAL;
1955                 break;
1956         default:
1957                 err = -EINVAL;
1958         }
1959
1960         if (err)
1961                 goto out;
1962
1963         if (!rdev->ops->change_station) {
1964                 err = -EOPNOTSUPP;
1965                 goto out;
1966         }
1967
1968         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1969
1970  out:
1971         if (params.vlan)
1972                 dev_put(params.vlan);
1973         cfg80211_unlock_rdev(rdev);
1974         dev_put(dev);
1975  out_rtnl:
1976         rtnl_unlock();
1977
1978         return err;
1979 }
1980
1981 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1982 {
1983         struct cfg80211_registered_device *rdev;
1984         int err;
1985         struct net_device *dev;
1986         struct station_parameters params;
1987         u8 *mac_addr = NULL;
1988
1989         memset(&params, 0, sizeof(params));
1990
1991         if (!info->attrs[NL80211_ATTR_MAC])
1992                 return -EINVAL;
1993
1994         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1995                 return -EINVAL;
1996
1997         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1998                 return -EINVAL;
1999
2000         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2001         params.supported_rates =
2002                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2003         params.supported_rates_len =
2004                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2005         params.listen_interval =
2006                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2007
2008         if (info->attrs[NL80211_ATTR_STA_AID]) {
2009                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2010                 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2011                         return -EINVAL;
2012         }
2013
2014         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2015                 params.ht_capa =
2016                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2017
2018         if (parse_station_flags(info, &params))
2019                 return -EINVAL;
2020
2021         rtnl_lock();
2022
2023         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2024         if (err)
2025                 goto out_rtnl;
2026
2027         err = get_vlan(info, rdev, &params.vlan);
2028         if (err)
2029                 goto out;
2030
2031         /* validate settings */
2032         err = 0;
2033
2034         switch (dev->ieee80211_ptr->iftype) {
2035         case NL80211_IFTYPE_AP:
2036         case NL80211_IFTYPE_AP_VLAN:
2037                 /* all ok but must have AID */
2038                 if (!params.aid)
2039                         err = -EINVAL;
2040                 break;
2041         case NL80211_IFTYPE_MESH_POINT:
2042                 /* disallow things mesh doesn't support */
2043                 if (params.vlan)
2044                         err = -EINVAL;
2045                 if (params.aid)
2046                         err = -EINVAL;
2047                 if (params.ht_capa)
2048                         err = -EINVAL;
2049                 if (params.listen_interval >= 0)
2050                         err = -EINVAL;
2051                 if (params.supported_rates)
2052                         err = -EINVAL;
2053                 if (params.sta_flags_mask)
2054                         err = -EINVAL;
2055                 break;
2056         default:
2057                 err = -EINVAL;
2058         }
2059
2060         if (err)
2061                 goto out;
2062
2063         if (!rdev->ops->add_station) {
2064                 err = -EOPNOTSUPP;
2065                 goto out;
2066         }
2067
2068         if (!netif_running(dev)) {
2069                 err = -ENETDOWN;
2070                 goto out;
2071         }
2072
2073         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2074
2075  out:
2076         if (params.vlan)
2077                 dev_put(params.vlan);
2078         cfg80211_unlock_rdev(rdev);
2079         dev_put(dev);
2080  out_rtnl:
2081         rtnl_unlock();
2082
2083         return err;
2084 }
2085
2086 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2087 {
2088         struct cfg80211_registered_device *rdev;
2089         int err;
2090         struct net_device *dev;
2091         u8 *mac_addr = NULL;
2092
2093         if (info->attrs[NL80211_ATTR_MAC])
2094                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2095
2096         rtnl_lock();
2097
2098         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2099         if (err)
2100                 goto out_rtnl;
2101
2102         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2103             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2104             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2105                 err = -EINVAL;
2106                 goto out;
2107         }
2108
2109         if (!rdev->ops->del_station) {
2110                 err = -EOPNOTSUPP;
2111                 goto out;
2112         }
2113
2114         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2115
2116  out:
2117         cfg80211_unlock_rdev(rdev);
2118         dev_put(dev);
2119  out_rtnl:
2120         rtnl_unlock();
2121
2122         return err;
2123 }
2124
2125 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2126                                 int flags, struct net_device *dev,
2127                                 u8 *dst, u8 *next_hop,
2128                                 struct mpath_info *pinfo)
2129 {
2130         void *hdr;
2131         struct nlattr *pinfoattr;
2132
2133         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2134         if (!hdr)
2135                 return -1;
2136
2137         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2138         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2139         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2140
2141         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2142         if (!pinfoattr)
2143                 goto nla_put_failure;
2144         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2145                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2146                             pinfo->frame_qlen);
2147         if (pinfo->filled & MPATH_INFO_DSN)
2148                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
2149                             pinfo->dsn);
2150         if (pinfo->filled & MPATH_INFO_METRIC)
2151                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2152                             pinfo->metric);
2153         if (pinfo->filled & MPATH_INFO_EXPTIME)
2154                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2155                             pinfo->exptime);
2156         if (pinfo->filled & MPATH_INFO_FLAGS)
2157                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2158                             pinfo->flags);
2159         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2160                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2161                             pinfo->discovery_timeout);
2162         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2163                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2164                             pinfo->discovery_retries);
2165
2166         nla_nest_end(msg, pinfoattr);
2167
2168         return genlmsg_end(msg, hdr);
2169
2170  nla_put_failure:
2171         genlmsg_cancel(msg, hdr);
2172         return -EMSGSIZE;
2173 }
2174
2175 static int nl80211_dump_mpath(struct sk_buff *skb,
2176                               struct netlink_callback *cb)
2177 {
2178         struct mpath_info pinfo;
2179         struct cfg80211_registered_device *dev;
2180         struct net_device *netdev;
2181         u8 dst[ETH_ALEN];
2182         u8 next_hop[ETH_ALEN];
2183         int ifidx = cb->args[0];
2184         int path_idx = cb->args[1];
2185         int err;
2186
2187         if (!ifidx) {
2188                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2189                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2190                                   nl80211_policy);
2191                 if (err)
2192                         return err;
2193
2194                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2195                         return -EINVAL;
2196
2197                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2198                 if (!ifidx)
2199                         return -EINVAL;
2200         }
2201
2202         rtnl_lock();
2203
2204         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2205         if (!netdev) {
2206                 err = -ENODEV;
2207                 goto out_rtnl;
2208         }
2209
2210         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2211         if (IS_ERR(dev)) {
2212                 err = PTR_ERR(dev);
2213                 goto out_rtnl;
2214         }
2215
2216         if (!dev->ops->dump_mpath) {
2217                 err = -EOPNOTSUPP;
2218                 goto out_err;
2219         }
2220
2221         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2222                 err = -EOPNOTSUPP;
2223                 goto out;
2224         }
2225
2226         while (1) {
2227                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2228                                            dst, next_hop, &pinfo);
2229                 if (err == -ENOENT)
2230                         break;
2231                 if (err)
2232                         goto out_err;
2233
2234                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2235                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2236                                        netdev, dst, next_hop,
2237                                        &pinfo) < 0)
2238                         goto out;
2239
2240                 path_idx++;
2241         }
2242
2243
2244  out:
2245         cb->args[1] = path_idx;
2246         err = skb->len;
2247  out_err:
2248         cfg80211_unlock_rdev(dev);
2249  out_rtnl:
2250         rtnl_unlock();
2251
2252         return err;
2253 }
2254
2255 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2256 {
2257         struct cfg80211_registered_device *rdev;
2258         int err;
2259         struct net_device *dev;
2260         struct mpath_info pinfo;
2261         struct sk_buff *msg;
2262         u8 *dst = NULL;
2263         u8 next_hop[ETH_ALEN];
2264
2265         memset(&pinfo, 0, sizeof(pinfo));
2266
2267         if (!info->attrs[NL80211_ATTR_MAC])
2268                 return -EINVAL;
2269
2270         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2271
2272         rtnl_lock();
2273
2274         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2275         if (err)
2276                 goto out_rtnl;
2277
2278         if (!rdev->ops->get_mpath) {
2279                 err = -EOPNOTSUPP;
2280                 goto out;
2281         }
2282
2283         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2284                 err = -EOPNOTSUPP;
2285                 goto out;
2286         }
2287
2288         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2289         if (err)
2290                 goto out;
2291
2292         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2293         if (!msg)
2294                 goto out;
2295
2296         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2297                                  dev, dst, next_hop, &pinfo) < 0)
2298                 goto out_free;
2299
2300         err = genlmsg_reply(msg, info);
2301         goto out;
2302
2303  out_free:
2304         nlmsg_free(msg);
2305  out:
2306         cfg80211_unlock_rdev(rdev);
2307         dev_put(dev);
2308  out_rtnl:
2309         rtnl_unlock();
2310
2311         return err;
2312 }
2313
2314 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2315 {
2316         struct cfg80211_registered_device *rdev;
2317         int err;
2318         struct net_device *dev;
2319         u8 *dst = NULL;
2320         u8 *next_hop = NULL;
2321
2322         if (!info->attrs[NL80211_ATTR_MAC])
2323                 return -EINVAL;
2324
2325         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2326                 return -EINVAL;
2327
2328         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2329         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2330
2331         rtnl_lock();
2332
2333         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2334         if (err)
2335                 goto out_rtnl;
2336
2337         if (!rdev->ops->change_mpath) {
2338                 err = -EOPNOTSUPP;
2339                 goto out;
2340         }
2341
2342         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2343                 err = -EOPNOTSUPP;
2344                 goto out;
2345         }
2346
2347         if (!netif_running(dev)) {
2348                 err = -ENETDOWN;
2349                 goto out;
2350         }
2351
2352         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2353
2354  out:
2355         cfg80211_unlock_rdev(rdev);
2356         dev_put(dev);
2357  out_rtnl:
2358         rtnl_unlock();
2359
2360         return err;
2361 }
2362 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2363 {
2364         struct cfg80211_registered_device *rdev;
2365         int err;
2366         struct net_device *dev;
2367         u8 *dst = NULL;
2368         u8 *next_hop = NULL;
2369
2370         if (!info->attrs[NL80211_ATTR_MAC])
2371                 return -EINVAL;
2372
2373         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2374                 return -EINVAL;
2375
2376         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2377         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2378
2379         rtnl_lock();
2380
2381         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2382         if (err)
2383                 goto out_rtnl;
2384
2385         if (!rdev->ops->add_mpath) {
2386                 err = -EOPNOTSUPP;
2387                 goto out;
2388         }
2389
2390         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2391                 err = -EOPNOTSUPP;
2392                 goto out;
2393         }
2394
2395         if (!netif_running(dev)) {
2396                 err = -ENETDOWN;
2397                 goto out;
2398         }
2399
2400         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2401
2402  out:
2403         cfg80211_unlock_rdev(rdev);
2404         dev_put(dev);
2405  out_rtnl:
2406         rtnl_unlock();
2407
2408         return err;
2409 }
2410
2411 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2412 {
2413         struct cfg80211_registered_device *rdev;
2414         int err;
2415         struct net_device *dev;
2416         u8 *dst = NULL;
2417
2418         if (info->attrs[NL80211_ATTR_MAC])
2419                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2420
2421         rtnl_lock();
2422
2423         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2424         if (err)
2425                 goto out_rtnl;
2426
2427         if (!rdev->ops->del_mpath) {
2428                 err = -EOPNOTSUPP;
2429                 goto out;
2430         }
2431
2432         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2433
2434  out:
2435         cfg80211_unlock_rdev(rdev);
2436         dev_put(dev);
2437  out_rtnl:
2438         rtnl_unlock();
2439
2440         return err;
2441 }
2442
2443 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2444 {
2445         struct cfg80211_registered_device *rdev;
2446         int err;
2447         struct net_device *dev;
2448         struct bss_parameters params;
2449
2450         memset(&params, 0, sizeof(params));
2451         /* default to not changing parameters */
2452         params.use_cts_prot = -1;
2453         params.use_short_preamble = -1;
2454         params.use_short_slot_time = -1;
2455
2456         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2457                 params.use_cts_prot =
2458                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2459         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2460                 params.use_short_preamble =
2461                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2462         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2463                 params.use_short_slot_time =
2464                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2465         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2466                 params.basic_rates =
2467                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2468                 params.basic_rates_len =
2469                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2470         }
2471
2472         rtnl_lock();
2473
2474         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2475         if (err)
2476                 goto out_rtnl;
2477
2478         if (!rdev->ops->change_bss) {
2479                 err = -EOPNOTSUPP;
2480                 goto out;
2481         }
2482
2483         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2484                 err = -EOPNOTSUPP;
2485                 goto out;
2486         }
2487
2488         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2489
2490  out:
2491         cfg80211_unlock_rdev(rdev);
2492         dev_put(dev);
2493  out_rtnl:
2494         rtnl_unlock();
2495
2496         return err;
2497 }
2498
2499 static const struct nla_policy
2500         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2501         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2502         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2503         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2504         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2505         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2506         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2507 };
2508
2509 static int parse_reg_rule(struct nlattr *tb[],
2510         struct ieee80211_reg_rule *reg_rule)
2511 {
2512         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2513         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2514
2515         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2516                 return -EINVAL;
2517         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2518                 return -EINVAL;
2519         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2520                 return -EINVAL;
2521         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2522                 return -EINVAL;
2523         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2524                 return -EINVAL;
2525
2526         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2527
2528         freq_range->start_freq_khz =
2529                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2530         freq_range->end_freq_khz =
2531                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2532         freq_range->max_bandwidth_khz =
2533                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2534
2535         power_rule->max_eirp =
2536                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2537
2538         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2539                 power_rule->max_antenna_gain =
2540                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2541
2542         return 0;
2543 }
2544
2545 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2546 {
2547         int r;
2548         char *data = NULL;
2549
2550         /*
2551          * You should only get this when cfg80211 hasn't yet initialized
2552          * completely when built-in to the kernel right between the time
2553          * window between nl80211_init() and regulatory_init(), if that is
2554          * even possible.
2555          */
2556         mutex_lock(&cfg80211_mutex);
2557         if (unlikely(!cfg80211_regdomain)) {
2558                 mutex_unlock(&cfg80211_mutex);
2559                 return -EINPROGRESS;
2560         }
2561         mutex_unlock(&cfg80211_mutex);
2562
2563         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2564                 return -EINVAL;
2565
2566         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2567
2568 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2569         /* We ignore world regdom requests with the old regdom setup */
2570         if (is_world_regdom(data))
2571                 return -EINVAL;
2572 #endif
2573
2574         r = regulatory_hint_user(data);
2575
2576         return r;
2577 }
2578
2579 static int nl80211_get_mesh_params(struct sk_buff *skb,
2580         struct genl_info *info)
2581 {
2582         struct cfg80211_registered_device *rdev;
2583         struct mesh_config cur_params;
2584         int err;
2585         struct net_device *dev;
2586         void *hdr;
2587         struct nlattr *pinfoattr;
2588         struct sk_buff *msg;
2589
2590         rtnl_lock();
2591
2592         /* Look up our device */
2593         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2594         if (err)
2595                 goto out_rtnl;
2596
2597         if (!rdev->ops->get_mesh_params) {
2598                 err = -EOPNOTSUPP;
2599                 goto out;
2600         }
2601
2602         /* Get the mesh params */
2603         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2604         if (err)
2605                 goto out;
2606
2607         /* Draw up a netlink message to send back */
2608         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2609         if (!msg) {
2610                 err = -ENOBUFS;
2611                 goto out;
2612         }
2613         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2614                              NL80211_CMD_GET_MESH_PARAMS);
2615         if (!hdr)
2616                 goto nla_put_failure;
2617         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2618         if (!pinfoattr)
2619                 goto nla_put_failure;
2620         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2621         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2622                         cur_params.dot11MeshRetryTimeout);
2623         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2624                         cur_params.dot11MeshConfirmTimeout);
2625         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2626                         cur_params.dot11MeshHoldingTimeout);
2627         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2628                         cur_params.dot11MeshMaxPeerLinks);
2629         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2630                         cur_params.dot11MeshMaxRetries);
2631         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2632                         cur_params.dot11MeshTTL);
2633         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2634                         cur_params.auto_open_plinks);
2635         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2636                         cur_params.dot11MeshHWMPmaxPREQretries);
2637         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2638                         cur_params.path_refresh_time);
2639         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2640                         cur_params.min_discovery_timeout);
2641         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2642                         cur_params.dot11MeshHWMPactivePathTimeout);
2643         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2644                         cur_params.dot11MeshHWMPpreqMinInterval);
2645         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2646                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2647         nla_nest_end(msg, pinfoattr);
2648         genlmsg_end(msg, hdr);
2649         err = genlmsg_reply(msg, info);
2650         goto out;
2651
2652  nla_put_failure:
2653         genlmsg_cancel(msg, hdr);
2654         err = -EMSGSIZE;
2655  out:
2656         /* Cleanup */
2657         cfg80211_unlock_rdev(rdev);
2658         dev_put(dev);
2659  out_rtnl:
2660         rtnl_unlock();
2661
2662         return err;
2663 }
2664
2665 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2666 do {\
2667         if (table[attr_num]) {\
2668                 cfg.param = nla_fn(table[attr_num]); \
2669                 mask |= (1 << (attr_num - 1)); \
2670         } \
2671 } while (0);\
2672
2673 static struct nla_policy
2674 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2675         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2676         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2677         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2678         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2679         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2680         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2681         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2682
2683         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2684         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2685         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2686         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2687         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2688         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2689 };
2690
2691 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2692 {
2693         int err;
2694         u32 mask;
2695         struct cfg80211_registered_device *rdev;
2696         struct net_device *dev;
2697         struct mesh_config cfg;
2698         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2699         struct nlattr *parent_attr;
2700
2701         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2702         if (!parent_attr)
2703                 return -EINVAL;
2704         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2705                         parent_attr, nl80211_meshconf_params_policy))
2706                 return -EINVAL;
2707
2708         rtnl_lock();
2709
2710         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2711         if (err)
2712                 goto out_rtnl;
2713
2714         if (!rdev->ops->set_mesh_params) {
2715                 err = -EOPNOTSUPP;
2716                 goto out;
2717         }
2718
2719         /* This makes sure that there aren't more than 32 mesh config
2720          * parameters (otherwise our bitfield scheme would not work.) */
2721         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2722
2723         /* Fill in the params struct */
2724         mask = 0;
2725         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2726                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2727         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2728                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2729         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2730                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2732                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2733         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2734                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2735         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2736                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2737         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2738                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2739         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2740                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2741                         nla_get_u8);
2742         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2743                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2744         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2745                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2746                         nla_get_u16);
2747         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2748                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2749                         nla_get_u32);
2750         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2751                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2752                         nla_get_u16);
2753         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2754                         dot11MeshHWMPnetDiameterTraversalTime,
2755                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2756                         nla_get_u16);
2757
2758         /* Apply changes */
2759         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2760
2761  out:
2762         /* cleanup */
2763         cfg80211_unlock_rdev(rdev);
2764         dev_put(dev);
2765  out_rtnl:
2766         rtnl_unlock();
2767
2768         return err;
2769 }
2770
2771 #undef FILL_IN_MESH_PARAM_IF_SET
2772
2773 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2774 {
2775         struct sk_buff *msg;
2776         void *hdr = NULL;
2777         struct nlattr *nl_reg_rules;
2778         unsigned int i;
2779         int err = -EINVAL;
2780
2781         mutex_lock(&cfg80211_mutex);
2782
2783         if (!cfg80211_regdomain)
2784                 goto out;
2785
2786         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2787         if (!msg) {
2788                 err = -ENOBUFS;
2789                 goto out;
2790         }
2791
2792         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2793                              NL80211_CMD_GET_REG);
2794         if (!hdr)
2795                 goto nla_put_failure;
2796
2797         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2798                 cfg80211_regdomain->alpha2);
2799
2800         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2801         if (!nl_reg_rules)
2802                 goto nla_put_failure;
2803
2804         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2805                 struct nlattr *nl_reg_rule;
2806                 const struct ieee80211_reg_rule *reg_rule;
2807                 const struct ieee80211_freq_range *freq_range;
2808                 const struct ieee80211_power_rule *power_rule;
2809
2810                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2811                 freq_range = &reg_rule->freq_range;
2812                 power_rule = &reg_rule->power_rule;
2813
2814                 nl_reg_rule = nla_nest_start(msg, i);
2815                 if (!nl_reg_rule)
2816                         goto nla_put_failure;
2817
2818                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2819                         reg_rule->flags);
2820                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2821                         freq_range->start_freq_khz);
2822                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2823                         freq_range->end_freq_khz);
2824                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2825                         freq_range->max_bandwidth_khz);
2826                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2827                         power_rule->max_antenna_gain);
2828                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2829                         power_rule->max_eirp);
2830
2831                 nla_nest_end(msg, nl_reg_rule);
2832         }
2833
2834         nla_nest_end(msg, nl_reg_rules);
2835
2836         genlmsg_end(msg, hdr);
2837         err = genlmsg_reply(msg, info);
2838         goto out;
2839
2840 nla_put_failure:
2841         genlmsg_cancel(msg, hdr);
2842         err = -EMSGSIZE;
2843 out:
2844         mutex_unlock(&cfg80211_mutex);
2845         return err;
2846 }
2847
2848 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2849 {
2850         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2851         struct nlattr *nl_reg_rule;
2852         char *alpha2 = NULL;
2853         int rem_reg_rules = 0, r = 0;
2854         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2855         struct ieee80211_regdomain *rd = NULL;
2856
2857         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2858                 return -EINVAL;
2859
2860         if (!info->attrs[NL80211_ATTR_REG_RULES])
2861                 return -EINVAL;
2862
2863         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2864
2865         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2866                         rem_reg_rules) {
2867                 num_rules++;
2868                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2869                         return -EINVAL;
2870         }
2871
2872         mutex_lock(&cfg80211_mutex);
2873
2874         if (!reg_is_valid_request(alpha2)) {
2875                 r = -EINVAL;
2876                 goto bad_reg;
2877         }
2878
2879         size_of_regd = sizeof(struct ieee80211_regdomain) +
2880                 (num_rules * sizeof(struct ieee80211_reg_rule));
2881
2882         rd = kzalloc(size_of_regd, GFP_KERNEL);
2883         if (!rd) {
2884                 r = -ENOMEM;
2885                 goto bad_reg;
2886         }
2887
2888         rd->n_reg_rules = num_rules;
2889         rd->alpha2[0] = alpha2[0];
2890         rd->alpha2[1] = alpha2[1];
2891
2892         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2893                         rem_reg_rules) {
2894                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2895                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2896                         reg_rule_policy);
2897                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2898                 if (r)
2899                         goto bad_reg;
2900
2901                 rule_idx++;
2902
2903                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2904                         r = -EINVAL;
2905                         goto bad_reg;
2906                 }
2907         }
2908
2909         BUG_ON(rule_idx != num_rules);
2910
2911         r = set_regdom(rd);
2912
2913         mutex_unlock(&cfg80211_mutex);
2914
2915         return r;
2916
2917  bad_reg:
2918         mutex_unlock(&cfg80211_mutex);
2919         kfree(rd);
2920         return r;
2921 }
2922
2923 static int validate_scan_freqs(struct nlattr *freqs)
2924 {
2925         struct nlattr *attr1, *attr2;
2926         int n_channels = 0, tmp1, tmp2;
2927
2928         nla_for_each_nested(attr1, freqs, tmp1) {
2929                 n_channels++;
2930                 /*
2931                  * Some hardware has a limited channel list for
2932                  * scanning, and it is pretty much nonsensical
2933                  * to scan for a channel twice, so disallow that
2934                  * and don't require drivers to check that the
2935                  * channel list they get isn't longer than what
2936                  * they can scan, as long as they can scan all
2937                  * the channels they registered at once.
2938                  */
2939                 nla_for_each_nested(attr2, freqs, tmp2)
2940                         if (attr1 != attr2 &&
2941                             nla_get_u32(attr1) == nla_get_u32(attr2))
2942                                 return 0;
2943         }
2944
2945         return n_channels;
2946 }
2947
2948 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2949 {
2950         struct cfg80211_registered_device *rdev;
2951         struct net_device *dev;
2952         struct cfg80211_scan_request *request;
2953         struct cfg80211_ssid *ssid;
2954         struct ieee80211_channel *channel;
2955         struct nlattr *attr;
2956         struct wiphy *wiphy;
2957         int err, tmp, n_ssids = 0, n_channels, i;
2958         enum ieee80211_band band;
2959         size_t ie_len;
2960
2961         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2962                 return -EINVAL;
2963
2964         rtnl_lock();
2965
2966         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2967         if (err)
2968                 goto out_rtnl;
2969
2970         wiphy = &rdev->wiphy;
2971
2972         if (!rdev->ops->scan) {
2973                 err = -EOPNOTSUPP;
2974                 goto out;
2975         }
2976
2977         if (!netif_running(dev)) {
2978                 err = -ENETDOWN;
2979                 goto out;
2980         }
2981
2982         if (rdev->scan_req) {
2983                 err = -EBUSY;
2984                 goto out;
2985         }
2986
2987         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2988                 n_channels = validate_scan_freqs(
2989                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2990                 if (!n_channels) {
2991                         err = -EINVAL;
2992                         goto out;
2993                 }
2994         } else {
2995                 n_channels = 0;
2996
2997                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2998                         if (wiphy->bands[band])
2999                                 n_channels += wiphy->bands[band]->n_channels;
3000         }
3001
3002         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3003                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3004                         n_ssids++;
3005
3006         if (n_ssids > wiphy->max_scan_ssids) {
3007                 err = -EINVAL;
3008                 goto out;
3009         }
3010
3011         if (info->attrs[NL80211_ATTR_IE])
3012                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3013         else
3014                 ie_len = 0;
3015
3016         if (ie_len > wiphy->max_scan_ie_len) {
3017                 err = -EINVAL;
3018                 goto out;
3019         }
3020
3021         request = kzalloc(sizeof(*request)
3022                         + sizeof(*ssid) * n_ssids
3023                         + sizeof(channel) * n_channels
3024                         + ie_len, GFP_KERNEL);
3025         if (!request) {
3026                 err = -ENOMEM;
3027                 goto out;
3028         }
3029
3030         request->channels = (void *)((char *)request + sizeof(*request));
3031         request->n_channels = n_channels;
3032         if (n_ssids)
3033                 request->ssids = (void *)(request->channels + n_channels);
3034         request->n_ssids = n_ssids;
3035         if (ie_len) {
3036                 if (request->ssids)
3037                         request->ie = (void *)(request->ssids + n_ssids);
3038                 else
3039                         request->ie = (void *)(request->channels + n_channels);
3040         }
3041
3042         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3043                 /* user specified, bail out if channel not found */
3044                 request->n_channels = n_channels;
3045                 i = 0;
3046                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3047                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3048                         if (!request->channels[i]) {
3049                                 err = -EINVAL;
3050                                 goto out_free;
3051                         }
3052                         i++;
3053                 }
3054         } else {
3055                 /* all channels */
3056                 i = 0;
3057                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3058                         int j;
3059                         if (!wiphy->bands[band])
3060                                 continue;
3061                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3062                                 request->channels[i] = &wiphy->bands[band]->channels[j];
3063                                 i++;
3064                         }
3065                 }
3066         }
3067
3068         i = 0;
3069         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3070                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3071                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3072                                 err = -EINVAL;
3073                                 goto out_free;
3074                         }
3075                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3076                         request->ssids[i].ssid_len = nla_len(attr);
3077                         i++;
3078                 }
3079         }
3080
3081         if (info->attrs[NL80211_ATTR_IE]) {
3082                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3083                 memcpy((void *)request->ie,
3084                        nla_data(info->attrs[NL80211_ATTR_IE]),
3085                        request->ie_len);
3086         }
3087
3088         request->dev = dev;
3089         request->wiphy = &rdev->wiphy;
3090
3091         rdev->scan_req = request;
3092         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3093
3094         if (!err) {
3095                 nl80211_send_scan_start(rdev, dev);
3096                 dev_hold(dev);
3097         }
3098
3099  out_free:
3100         if (err) {
3101                 rdev->scan_req = NULL;
3102                 kfree(request);
3103         }
3104  out:
3105         cfg80211_unlock_rdev(rdev);
3106         dev_put(dev);
3107  out_rtnl:
3108         rtnl_unlock();
3109
3110         return err;
3111 }
3112
3113 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3114                             struct cfg80211_registered_device *rdev,
3115                             struct wireless_dev *wdev,
3116                             struct cfg80211_internal_bss *intbss)
3117 {
3118         struct cfg80211_bss *res = &intbss->pub;
3119         void *hdr;
3120         struct nlattr *bss;
3121         int i;
3122
3123         ASSERT_WDEV_LOCK(wdev);
3124
3125         hdr = nl80211hdr_put(msg, pid, seq, flags,
3126                              NL80211_CMD_NEW_SCAN_RESULTS);
3127         if (!hdr)
3128                 return -1;
3129
3130         NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
3131                     rdev->bss_generation);
3132         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3133
3134         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3135         if (!bss)
3136                 goto nla_put_failure;
3137         if (!is_zero_ether_addr(res->bssid))
3138                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3139         if (res->information_elements && res->len_information_elements)
3140                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3141                         res->len_information_elements,
3142                         res->information_elements);
3143         if (res->tsf)
3144                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3145         if (res->beacon_interval)
3146                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3147         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3148         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3149
3150         switch (rdev->wiphy.signal_type) {
3151         case CFG80211_SIGNAL_TYPE_MBM:
3152                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3153                 break;
3154         case CFG80211_SIGNAL_TYPE_UNSPEC:
3155                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3156                 break;
3157         default:
3158                 break;
3159         }
3160
3161         switch (wdev->iftype) {
3162         case NL80211_IFTYPE_STATION:
3163                 if (intbss == wdev->current_bss)
3164                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3165                                     NL80211_BSS_STATUS_ASSOCIATED);
3166                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3167                         if (intbss != wdev->auth_bsses[i])
3168                                 continue;
3169                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3170                                     NL80211_BSS_STATUS_AUTHENTICATED);
3171                         break;
3172                 }
3173                 break;
3174         case NL80211_IFTYPE_ADHOC:
3175                 if (intbss == wdev->current_bss)
3176                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3177                                     NL80211_BSS_STATUS_IBSS_JOINED);
3178                 break;
3179         default:
3180                 break;
3181         }
3182
3183         nla_nest_end(msg, bss);
3184
3185         return genlmsg_end(msg, hdr);
3186
3187  nla_put_failure:
3188         genlmsg_cancel(msg, hdr);
3189         return -EMSGSIZE;
3190 }
3191
3192 static int nl80211_dump_scan(struct sk_buff *skb,
3193                              struct netlink_callback *cb)
3194 {
3195         struct cfg80211_registered_device *rdev;
3196         struct net_device *dev;
3197         struct cfg80211_internal_bss *scan;
3198         struct wireless_dev *wdev;
3199         int ifidx = cb->args[0];
3200         int start = cb->args[1], idx = 0;
3201         int err;
3202
3203         if (!ifidx) {
3204                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
3205                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
3206                                   nl80211_policy);
3207                 if (err)
3208                         return err;
3209
3210                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
3211                         return -EINVAL;
3212
3213                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
3214                 if (!ifidx)
3215                         return -EINVAL;
3216                 cb->args[0] = ifidx;
3217         }
3218
3219         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3220         if (!dev)
3221                 return -ENODEV;
3222
3223         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3224         if (IS_ERR(rdev)) {
3225                 err = PTR_ERR(rdev);
3226                 goto out_put_netdev;
3227         }
3228
3229         wdev = dev->ieee80211_ptr;
3230
3231         wdev_lock(wdev);
3232         spin_lock_bh(&rdev->bss_lock);
3233         cfg80211_bss_expire(rdev);
3234
3235         list_for_each_entry(scan, &rdev->bss_list, list) {
3236                 if (++idx <= start)
3237                         continue;
3238                 if (nl80211_send_bss(skb,
3239                                 NETLINK_CB(cb->skb).pid,
3240                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3241                                 rdev, wdev, scan) < 0) {
3242                         idx--;
3243                         goto out;
3244                 }
3245         }
3246
3247  out:
3248         spin_unlock_bh(&rdev->bss_lock);
3249         wdev_unlock(wdev);
3250
3251         cb->args[1] = idx;
3252         err = skb->len;
3253         cfg80211_unlock_rdev(rdev);
3254  out_put_netdev:
3255         dev_put(dev);
3256
3257         return err;
3258 }
3259
3260 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3261 {
3262         return auth_type <= NL80211_AUTHTYPE_MAX;
3263 }
3264
3265 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3266 {
3267         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3268                                   NL80211_WPA_VERSION_2));
3269 }
3270
3271 static bool nl80211_valid_akm_suite(u32 akm)
3272 {
3273         return akm == WLAN_AKM_SUITE_8021X ||
3274                 akm == WLAN_AKM_SUITE_PSK;
3275 }
3276
3277 static bool nl80211_valid_cipher_suite(u32 cipher)
3278 {
3279         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3280                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3281                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3282                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3283                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3284 }
3285
3286
3287 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3288 {
3289         struct cfg80211_registered_device *rdev;
3290         struct net_device *dev;
3291         struct ieee80211_channel *chan;
3292         const u8 *bssid, *ssid, *ie = NULL;
3293         int err, ssid_len, ie_len = 0;
3294         enum nl80211_auth_type auth_type;
3295         struct key_parse key;
3296
3297         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3298                 return -EINVAL;
3299
3300         if (!info->attrs[NL80211_ATTR_MAC])
3301                 return -EINVAL;
3302
3303         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3304                 return -EINVAL;
3305
3306         if (!info->attrs[NL80211_ATTR_SSID])
3307                 return -EINVAL;
3308
3309         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3310                 return -EINVAL;
3311
3312         err = nl80211_parse_key(info, &key);
3313         if (err)
3314                 return err;
3315
3316         if (key.idx >= 0) {
3317                 if (!key.p.key || !key.p.key_len)
3318                         return -EINVAL;
3319                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3320                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3321                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3322                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3323                         return -EINVAL;
3324                 if (key.idx > 4)
3325                         return -EINVAL;
3326         } else {
3327                 key.p.key_len = 0;
3328                 key.p.key = NULL;
3329         }
3330
3331         rtnl_lock();
3332
3333         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3334         if (err)
3335                 goto unlock_rtnl;
3336
3337         if (!rdev->ops->auth) {
3338                 err = -EOPNOTSUPP;
3339                 goto out;
3340         }
3341
3342         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3343                 err = -EOPNOTSUPP;
3344                 goto out;
3345         }
3346
3347         if (!netif_running(dev)) {
3348                 err = -ENETDOWN;
3349                 goto out;
3350         }
3351
3352         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3353         chan = ieee80211_get_channel(&rdev->wiphy,
3354                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3355         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3356                 err = -EINVAL;
3357                 goto out;
3358         }
3359
3360         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3361         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3362
3363         if (info->attrs[NL80211_ATTR_IE]) {
3364                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3365                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3366         }
3367
3368         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3369         if (!nl80211_valid_auth_type(auth_type)) {
3370                 err = -EINVAL;
3371                 goto out;
3372         }
3373
3374         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3375                                  ssid, ssid_len, ie, ie_len,
3376                                  key.p.key, key.p.key_len, key.idx);
3377
3378 out:
3379         cfg80211_unlock_rdev(rdev);
3380         dev_put(dev);
3381 unlock_rtnl:
3382         rtnl_unlock();
3383         return err;
3384 }
3385
3386 static int nl80211_crypto_settings(struct genl_info *info,
3387                                    struct cfg80211_crypto_settings *settings,
3388                                    int cipher_limit)
3389 {
3390         memset(settings, 0, sizeof(*settings));
3391
3392         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3393
3394         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3395                 void *data;
3396                 int len, i;
3397
3398                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3399                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3400                 settings->n_ciphers_pairwise = len / sizeof(u32);
3401
3402                 if (len % sizeof(u32))
3403                         return -EINVAL;
3404
3405                 if (settings->n_ciphers_pairwise > cipher_limit)
3406                         return -EINVAL;
3407
3408                 memcpy(settings->ciphers_pairwise, data, len);
3409
3410                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3411                         if (!nl80211_valid_cipher_suite(
3412                                         settings->ciphers_pairwise[i]))
3413                                 return -EINVAL;
3414         }
3415
3416         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3417                 settings->cipher_group =
3418                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3419                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3420                         return -EINVAL;
3421         }
3422
3423         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3424                 settings->wpa_versions =
3425                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3426                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3427                         return -EINVAL;
3428         }
3429
3430         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3431                 void *data;
3432                 int len, i;
3433
3434                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3435                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3436                 settings->n_akm_suites = len / sizeof(u32);
3437
3438                 if (len % sizeof(u32))
3439                         return -EINVAL;
3440
3441                 memcpy(settings->akm_suites, data, len);
3442
3443                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3444                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3445                                 return -EINVAL;
3446         }
3447
3448         return 0;
3449 }
3450
3451 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3452 {
3453         struct cfg80211_registered_device *rdev;
3454         struct net_device *dev;
3455         struct cfg80211_crypto_settings crypto;
3456         struct ieee80211_channel *chan;
3457         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3458         int err, ssid_len, ie_len = 0;
3459         bool use_mfp = false;
3460
3461         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3462                 return -EINVAL;
3463
3464         if (!info->attrs[NL80211_ATTR_MAC] ||
3465             !info->attrs[NL80211_ATTR_SSID] ||
3466             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3467                 return -EINVAL;
3468
3469         rtnl_lock();
3470
3471         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3472         if (err)
3473                 goto unlock_rtnl;
3474
3475         if (!rdev->ops->assoc) {
3476                 err = -EOPNOTSUPP;
3477                 goto out;
3478         }
3479
3480         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3481                 err = -EOPNOTSUPP;
3482                 goto out;
3483         }
3484
3485         if (!netif_running(dev)) {
3486                 err = -ENETDOWN;
3487                 goto out;
3488         }
3489
3490         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3491
3492         chan = ieee80211_get_channel(&rdev->wiphy,
3493                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3494         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3495                 err = -EINVAL;
3496                 goto out;
3497         }
3498
3499         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3500         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3501
3502         if (info->attrs[NL80211_ATTR_IE]) {
3503                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3504                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3505         }
3506
3507         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3508                 enum nl80211_mfp mfp =
3509                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3510                 if (mfp == NL80211_MFP_REQUIRED)
3511                         use_mfp = true;
3512                 else if (mfp != NL80211_MFP_NO) {
3513                         err = -EINVAL;
3514                         goto out;
3515                 }
3516         }
3517
3518         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3519                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3520
3521         err = nl80211_crypto_settings(info, &crypto, 1);
3522         if (!err)
3523                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3524                                           ssid, ssid_len, ie, ie_len, use_mfp,
3525                                           &crypto);
3526
3527 out:
3528         cfg80211_unlock_rdev(rdev);
3529         dev_put(dev);
3530 unlock_rtnl:
3531         rtnl_unlock();
3532         return err;
3533 }
3534
3535 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3536 {
3537         struct cfg80211_registered_device *rdev;
3538         struct net_device *dev;
3539         const u8 *ie = NULL, *bssid;
3540         int err, ie_len = 0;
3541         u16 reason_code;
3542
3543         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3544                 return -EINVAL;
3545
3546         if (!info->attrs[NL80211_ATTR_MAC])
3547                 return -EINVAL;
3548
3549         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3550                 return -EINVAL;
3551
3552         rtnl_lock();
3553
3554         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3555         if (err)
3556                 goto unlock_rtnl;
3557
3558         if (!rdev->ops->deauth) {
3559                 err = -EOPNOTSUPP;
3560                 goto out;
3561         }
3562
3563         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3564                 err = -EOPNOTSUPP;
3565                 goto out;
3566         }
3567
3568         if (!netif_running(dev)) {
3569                 err = -ENETDOWN;
3570                 goto out;
3571         }
3572
3573         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3574
3575         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3576         if (reason_code == 0) {
3577                 /* Reason Code 0 is reserved */
3578                 err = -EINVAL;
3579                 goto out;
3580         }
3581
3582         if (info->attrs[NL80211_ATTR_IE]) {
3583                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3584                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3585         }
3586
3587         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3588
3589 out:
3590         cfg80211_unlock_rdev(rdev);
3591         dev_put(dev);
3592 unlock_rtnl:
3593         rtnl_unlock();
3594         return err;
3595 }
3596
3597 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3598 {
3599         struct cfg80211_registered_device *rdev;
3600         struct net_device *dev;
3601         const u8 *ie = NULL, *bssid;
3602         int err, ie_len = 0;
3603         u16 reason_code;
3604
3605         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3606                 return -EINVAL;
3607
3608         if (!info->attrs[NL80211_ATTR_MAC])
3609                 return -EINVAL;
3610
3611         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3612                 return -EINVAL;
3613
3614         rtnl_lock();
3615
3616         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3617         if (err)
3618                 goto unlock_rtnl;
3619
3620         if (!rdev->ops->disassoc) {
3621                 err = -EOPNOTSUPP;
3622                 goto out;
3623         }
3624
3625         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3626                 err = -EOPNOTSUPP;
3627                 goto out;
3628         }
3629
3630         if (!netif_running(dev)) {
3631                 err = -ENETDOWN;
3632                 goto out;
3633         }
3634
3635         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3636
3637         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3638         if (reason_code == 0) {
3639                 /* Reason Code 0 is reserved */
3640                 err = -EINVAL;
3641                 goto out;
3642         }
3643
3644         if (info->attrs[NL80211_ATTR_IE]) {
3645                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3646                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3647         }
3648
3649         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3650
3651 out:
3652         cfg80211_unlock_rdev(rdev);
3653         dev_put(dev);
3654 unlock_rtnl:
3655         rtnl_unlock();
3656         return err;
3657 }
3658
3659 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3660 {
3661         struct cfg80211_registered_device *rdev;
3662         struct net_device *dev;
3663         struct cfg80211_ibss_params ibss;
3664         struct wiphy *wiphy;
3665         struct cfg80211_cached_keys *connkeys = NULL;
3666         int err;
3667
3668         memset(&ibss, 0, sizeof(ibss));
3669
3670         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3671                 return -EINVAL;
3672
3673         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3674             !info->attrs[NL80211_ATTR_SSID] ||
3675             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3676                 return -EINVAL;
3677
3678         ibss.beacon_interval = 100;
3679
3680         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3681                 ibss.beacon_interval =
3682                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3683                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3684                         return -EINVAL;
3685         }
3686
3687         rtnl_lock();
3688
3689         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3690         if (err)
3691                 goto unlock_rtnl;
3692
3693         if (!rdev->ops->join_ibss) {
3694                 err = -EOPNOTSUPP;
3695                 goto out;
3696         }
3697
3698         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3699                 err = -EOPNOTSUPP;
3700                 goto out;
3701         }
3702
3703         if (!netif_running(dev)) {
3704                 err = -ENETDOWN;
3705                 goto out;
3706         }
3707
3708         wiphy = &rdev->wiphy;
3709
3710         if (info->attrs[NL80211_ATTR_MAC])
3711                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3712         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3713         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3714
3715         if (info->attrs[NL80211_ATTR_IE]) {
3716                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3717                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3718         }
3719
3720         ibss.channel = ieee80211_get_channel(wiphy,
3721                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3722         if (!ibss.channel ||
3723             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3724             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3725                 err = -EINVAL;
3726                 goto out;
3727         }
3728
3729         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3730         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3731
3732         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3733                 connkeys = nl80211_parse_connkeys(rdev,
3734                                         info->attrs[NL80211_ATTR_KEYS]);
3735                 if (IS_ERR(connkeys)) {
3736                         err = PTR_ERR(connkeys);
3737                         connkeys = NULL;
3738                         goto out;
3739                 }
3740         }
3741
3742         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3743
3744 out:
3745         cfg80211_unlock_rdev(rdev);
3746         dev_put(dev);
3747 unlock_rtnl:
3748         if (err)
3749                 kfree(connkeys);
3750         rtnl_unlock();
3751         return err;
3752 }
3753
3754 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3755 {
3756         struct cfg80211_registered_device *rdev;
3757         struct net_device *dev;
3758         int err;
3759
3760         rtnl_lock();
3761
3762         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3763         if (err)
3764                 goto unlock_rtnl;
3765
3766         if (!rdev->ops->leave_ibss) {
3767                 err = -EOPNOTSUPP;
3768                 goto out;
3769         }
3770
3771         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3772                 err = -EOPNOTSUPP;
3773                 goto out;
3774         }
3775
3776         if (!netif_running(dev)) {
3777                 err = -ENETDOWN;
3778                 goto out;
3779         }
3780
3781         err = cfg80211_leave_ibss(rdev, dev, false);
3782
3783 out:
3784         cfg80211_unlock_rdev(rdev);
3785         dev_put(dev);
3786 unlock_rtnl:
3787         rtnl_unlock();
3788         return err;
3789 }
3790
3791 #ifdef CONFIG_NL80211_TESTMODE
3792 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3793         .name = "testmode",
3794 };
3795
3796 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3797 {
3798         struct cfg80211_registered_device *rdev;
3799         int err;
3800
3801         if (!info->attrs[NL80211_ATTR_TESTDATA])
3802                 return -EINVAL;
3803
3804         rtnl_lock();
3805
3806         rdev = cfg80211_get_dev_from_info(info);
3807         if (IS_ERR(rdev)) {
3808                 err = PTR_ERR(rdev);
3809                 goto unlock_rtnl;
3810         }
3811
3812         err = -EOPNOTSUPP;
3813         if (rdev->ops->testmode_cmd) {
3814                 rdev->testmode_info = info;
3815                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3816                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3817                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3818                 rdev->testmode_info = NULL;
3819         }
3820
3821         cfg80211_unlock_rdev(rdev);
3822
3823  unlock_rtnl:
3824         rtnl_unlock();
3825         return err;
3826 }
3827
3828 static struct sk_buff *
3829 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3830                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3831 {
3832         struct sk_buff *skb;
3833         void *hdr;
3834         struct nlattr *data;
3835
3836         skb = nlmsg_new(approxlen + 100, gfp);
3837         if (!skb)
3838                 return NULL;
3839
3840         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3841         if (!hdr) {
3842                 kfree_skb(skb);
3843                 return NULL;
3844         }
3845
3846         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3847         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3848
3849         ((void **)skb->cb)[0] = rdev;
3850         ((void **)skb->cb)[1] = hdr;
3851         ((void **)skb->cb)[2] = data;
3852
3853         return skb;
3854
3855  nla_put_failure:
3856         kfree_skb(skb);
3857         return NULL;
3858 }
3859
3860 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3861                                                   int approxlen)
3862 {
3863         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3864
3865         if (WARN_ON(!rdev->testmode_info))
3866                 return NULL;
3867
3868         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3869                                 rdev->testmode_info->snd_pid,
3870                                 rdev->testmode_info->snd_seq,
3871                                 GFP_KERNEL);
3872 }
3873 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3874
3875 int cfg80211_testmode_reply(struct sk_buff *skb)
3876 {
3877         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3878         void *hdr = ((void **)skb->cb)[1];
3879         struct nlattr *data = ((void **)skb->cb)[2];
3880
3881         if (WARN_ON(!rdev->testmode_info)) {
3882                 kfree_skb(skb);
3883                 return -EINVAL;
3884         }
3885
3886         nla_nest_end(skb, data);
3887         genlmsg_end(skb, hdr);
3888         return genlmsg_reply(skb, rdev->testmode_info);
3889 }
3890 EXPORT_SYMBOL(cfg80211_testmode_reply);
3891
3892 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3893                                                   int approxlen, gfp_t gfp)
3894 {
3895         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3896
3897         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3898 }
3899 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3900
3901 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3902 {
3903         void *hdr = ((void **)skb->cb)[1];
3904         struct nlattr *data = ((void **)skb->cb)[2];
3905
3906         nla_nest_end(skb, data);
3907         genlmsg_end(skb, hdr);
3908         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3909 }
3910 EXPORT_SYMBOL(cfg80211_testmode_event);
3911 #endif
3912
3913 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3914 {
3915         struct cfg80211_registered_device *rdev;
3916         struct net_device *dev;
3917         struct cfg80211_connect_params connect;
3918         struct wiphy *wiphy;
3919         struct cfg80211_cached_keys *connkeys = NULL;
3920         int err;
3921
3922         memset(&connect, 0, sizeof(connect));
3923
3924         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3925                 return -EINVAL;
3926
3927         if (!info->attrs[NL80211_ATTR_SSID] ||
3928             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3929                 return -EINVAL;
3930
3931         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3932                 connect.auth_type =
3933                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3934                 if (!nl80211_valid_auth_type(connect.auth_type))
3935                         return -EINVAL;
3936         } else
3937                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3938
3939         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3940
3941         err = nl80211_crypto_settings(info, &connect.crypto,
3942                                       NL80211_MAX_NR_CIPHER_SUITES);
3943         if (err)
3944                 return err;
3945         rtnl_lock();
3946
3947         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3948         if (err)
3949                 goto unlock_rtnl;
3950
3951         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3952                 err = -EOPNOTSUPP;
3953                 goto out;
3954         }
3955
3956         if (!netif_running(dev)) {
3957                 err = -ENETDOWN;
3958                 goto out;
3959         }
3960
3961         wiphy = &rdev->wiphy;
3962
3963         if (info->attrs[NL80211_ATTR_MAC])
3964                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3965         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3966         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3967
3968         if (info->attrs[NL80211_ATTR_IE]) {
3969                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3970                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3971         }
3972
3973         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3974                 connect.channel =
3975                         ieee80211_get_channel(wiphy,
3976                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3977                 if (!connect.channel ||
3978                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
3979                         err = -EINVAL;
3980                         goto out;
3981                 }
3982         }
3983
3984         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3985                 connkeys = nl80211_parse_connkeys(rdev,
3986                                         info->attrs[NL80211_ATTR_KEYS]);
3987                 if (IS_ERR(connkeys)) {
3988                         err = PTR_ERR(connkeys);
3989                         connkeys = NULL;
3990                         goto out;
3991                 }
3992         }
3993
3994         err = cfg80211_connect(rdev, dev, &connect, connkeys);
3995
3996 out:
3997         cfg80211_unlock_rdev(rdev);
3998         dev_put(dev);
3999 unlock_rtnl:
4000         if (err)
4001                 kfree(connkeys);
4002         rtnl_unlock();
4003         return err;
4004 }
4005
4006 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4007 {
4008         struct cfg80211_registered_device *rdev;
4009         struct net_device *dev;
4010         int err;
4011         u16 reason;
4012
4013         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4014                 reason = WLAN_REASON_DEAUTH_LEAVING;
4015         else
4016                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4017
4018         if (reason == 0)
4019                 return -EINVAL;
4020
4021         rtnl_lock();
4022
4023         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4024         if (err)
4025                 goto unlock_rtnl;
4026
4027         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4028                 err = -EOPNOTSUPP;
4029                 goto out;
4030         }
4031
4032         if (!netif_running(dev)) {
4033                 err = -ENETDOWN;
4034                 goto out;
4035         }
4036
4037         err = cfg80211_disconnect(rdev, dev, reason, true);
4038
4039 out:
4040         cfg80211_unlock_rdev(rdev);
4041         dev_put(dev);
4042 unlock_rtnl:
4043         rtnl_unlock();
4044         return err;
4045 }
4046
4047 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4048 {
4049         struct cfg80211_registered_device *rdev;
4050         struct net *net;
4051         int err;
4052         u32 pid;
4053
4054         if (!info->attrs[NL80211_ATTR_PID])
4055                 return -EINVAL;
4056
4057         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4058
4059         rtnl_lock();
4060
4061         rdev = cfg80211_get_dev_from_info(info);
4062         if (IS_ERR(rdev)) {
4063                 err = PTR_ERR(rdev);
4064                 goto out;
4065         }
4066
4067         net = get_net_ns_by_pid(pid);
4068         if (IS_ERR(net)) {
4069                 err = PTR_ERR(net);
4070                 goto out;
4071         }
4072
4073         err = 0;
4074
4075         /* check if anything to do */
4076         if (net_eq(wiphy_net(&rdev->wiphy), net))
4077                 goto out_put_net;
4078
4079         err = cfg80211_switch_netns(rdev, net);
4080  out_put_net:
4081         put_net(net);
4082  out:
4083         cfg80211_unlock_rdev(rdev);
4084         rtnl_unlock();
4085         return err;
4086 }
4087
4088 static struct genl_ops nl80211_ops[] = {
4089         {
4090                 .cmd = NL80211_CMD_GET_WIPHY,
4091                 .doit = nl80211_get_wiphy,
4092                 .dumpit = nl80211_dump_wiphy,
4093                 .policy = nl80211_policy,
4094                 /* can be retrieved by unprivileged users */
4095         },
4096         {
4097                 .cmd = NL80211_CMD_SET_WIPHY,
4098                 .doit = nl80211_set_wiphy,
4099                 .policy = nl80211_policy,
4100                 .flags = GENL_ADMIN_PERM,
4101         },
4102         {
4103                 .cmd = NL80211_CMD_GET_INTERFACE,
4104                 .doit = nl80211_get_interface,
4105                 .dumpit = nl80211_dump_interface,
4106                 .policy = nl80211_policy,
4107                 /* can be retrieved by unprivileged users */
4108         },
4109         {
4110                 .cmd = NL80211_CMD_SET_INTERFACE,
4111                 .doit = nl80211_set_interface,
4112                 .policy = nl80211_policy,
4113                 .flags = GENL_ADMIN_PERM,
4114         },
4115         {
4116                 .cmd = NL80211_CMD_NEW_INTERFACE,
4117                 .doit = nl80211_new_interface,
4118                 .policy = nl80211_policy,
4119                 .flags = GENL_ADMIN_PERM,
4120         },
4121         {
4122                 .cmd = NL80211_CMD_DEL_INTERFACE,
4123                 .doit = nl80211_del_interface,
4124                 .policy = nl80211_policy,
4125                 .flags = GENL_ADMIN_PERM,
4126         },
4127         {
4128                 .cmd = NL80211_CMD_GET_KEY,
4129                 .doit = nl80211_get_key,
4130                 .policy = nl80211_policy,
4131                 .flags = GENL_ADMIN_PERM,
4132         },
4133         {
4134                 .cmd = NL80211_CMD_SET_KEY,
4135                 .doit = nl80211_set_key,
4136                 .policy = nl80211_policy,
4137                 .flags = GENL_ADMIN_PERM,
4138         },
4139         {
4140                 .cmd = NL80211_CMD_NEW_KEY,
4141                 .doit = nl80211_new_key,
4142                 .policy = nl80211_policy,
4143                 .flags = GENL_ADMIN_PERM,
4144         },
4145         {
4146                 .cmd = NL80211_CMD_DEL_KEY,
4147                 .doit = nl80211_del_key,
4148                 .policy = nl80211_policy,
4149                 .flags = GENL_ADMIN_PERM,
4150         },
4151         {
4152                 .cmd = NL80211_CMD_SET_BEACON,
4153                 .policy = nl80211_policy,
4154                 .flags = GENL_ADMIN_PERM,
4155                 .doit = nl80211_addset_beacon,
4156         },
4157         {
4158                 .cmd = NL80211_CMD_NEW_BEACON,
4159                 .policy = nl80211_policy,
4160                 .flags = GENL_ADMIN_PERM,
4161                 .doit = nl80211_addset_beacon,
4162         },
4163         {
4164                 .cmd = NL80211_CMD_DEL_BEACON,
4165                 .policy = nl80211_policy,
4166                 .flags = GENL_ADMIN_PERM,
4167                 .doit = nl80211_del_beacon,
4168         },
4169         {
4170                 .cmd = NL80211_CMD_GET_STATION,
4171                 .doit = nl80211_get_station,
4172                 .dumpit = nl80211_dump_station,
4173                 .policy = nl80211_policy,
4174         },
4175         {
4176                 .cmd = NL80211_CMD_SET_STATION,
4177                 .doit = nl80211_set_station,
4178                 .policy = nl80211_policy,
4179                 .flags = GENL_ADMIN_PERM,
4180         },
4181         {
4182                 .cmd = NL80211_CMD_NEW_STATION,
4183                 .doit = nl80211_new_station,
4184                 .policy = nl80211_policy,
4185                 .flags = GENL_ADMIN_PERM,
4186         },
4187         {
4188                 .cmd = NL80211_CMD_DEL_STATION,
4189                 .doit = nl80211_del_station,
4190                 .policy = nl80211_policy,
4191                 .flags = GENL_ADMIN_PERM,
4192         },
4193         {
4194                 .cmd = NL80211_CMD_GET_MPATH,
4195                 .doit = nl80211_get_mpath,
4196                 .dumpit = nl80211_dump_mpath,
4197                 .policy = nl80211_policy,
4198                 .flags = GENL_ADMIN_PERM,
4199         },
4200         {
4201                 .cmd = NL80211_CMD_SET_MPATH,
4202                 .doit = nl80211_set_mpath,
4203                 .policy = nl80211_policy,
4204                 .flags = GENL_ADMIN_PERM,
4205         },
4206         {
4207                 .cmd = NL80211_CMD_NEW_MPATH,
4208                 .doit = nl80211_new_mpath,
4209                 .policy = nl80211_policy,
4210                 .flags = GENL_ADMIN_PERM,
4211         },
4212         {
4213                 .cmd = NL80211_CMD_DEL_MPATH,
4214                 .doit = nl80211_del_mpath,
4215                 .policy = nl80211_policy,
4216                 .flags = GENL_ADMIN_PERM,
4217         },
4218         {
4219                 .cmd = NL80211_CMD_SET_BSS,
4220                 .doit = nl80211_set_bss,
4221                 .policy = nl80211_policy,
4222                 .flags = GENL_ADMIN_PERM,
4223         },
4224         {
4225                 .cmd = NL80211_CMD_GET_REG,
4226                 .doit = nl80211_get_reg,
4227                 .policy = nl80211_policy,
4228                 /* can be retrieved by unprivileged users */
4229         },
4230         {
4231                 .cmd = NL80211_CMD_SET_REG,
4232                 .doit = nl80211_set_reg,
4233                 .policy = nl80211_policy,
4234                 .flags = GENL_ADMIN_PERM,
4235         },
4236         {
4237                 .cmd = NL80211_CMD_REQ_SET_REG,
4238                 .doit = nl80211_req_set_reg,
4239                 .policy = nl80211_policy,
4240                 .flags = GENL_ADMIN_PERM,
4241         },
4242         {
4243                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4244                 .doit = nl80211_get_mesh_params,
4245                 .policy = nl80211_policy,
4246                 /* can be retrieved by unprivileged users */
4247         },
4248         {
4249                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4250                 .doit = nl80211_set_mesh_params,
4251                 .policy = nl80211_policy,
4252                 .flags = GENL_ADMIN_PERM,
4253         },
4254         {
4255                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4256                 .doit = nl80211_trigger_scan,
4257                 .policy = nl80211_policy,
4258                 .flags = GENL_ADMIN_PERM,
4259         },
4260         {
4261                 .cmd = NL80211_CMD_GET_SCAN,
4262                 .policy = nl80211_policy,
4263                 .dumpit = nl80211_dump_scan,
4264         },
4265         {
4266                 .cmd = NL80211_CMD_AUTHENTICATE,
4267                 .doit = nl80211_authenticate,
4268                 .policy = nl80211_policy,
4269                 .flags = GENL_ADMIN_PERM,
4270         },
4271         {
4272                 .cmd = NL80211_CMD_ASSOCIATE,
4273                 .doit = nl80211_associate,
4274                 .policy = nl80211_policy,
4275                 .flags = GENL_ADMIN_PERM,
4276         },
4277         {
4278                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4279                 .doit = nl80211_deauthenticate,
4280                 .policy = nl80211_policy,
4281                 .flags = GENL_ADMIN_PERM,
4282         },
4283         {
4284                 .cmd = NL80211_CMD_DISASSOCIATE,
4285                 .doit = nl80211_disassociate,
4286                 .policy = nl80211_policy,
4287                 .flags = GENL_ADMIN_PERM,
4288         },
4289         {
4290                 .cmd = NL80211_CMD_JOIN_IBSS,
4291                 .doit = nl80211_join_ibss,
4292                 .policy = nl80211_policy,
4293                 .flags = GENL_ADMIN_PERM,
4294         },
4295         {
4296                 .cmd = NL80211_CMD_LEAVE_IBSS,
4297                 .doit = nl80211_leave_ibss,
4298                 .policy = nl80211_policy,
4299                 .flags = GENL_ADMIN_PERM,
4300         },
4301 #ifdef CONFIG_NL80211_TESTMODE
4302         {
4303                 .cmd = NL80211_CMD_TESTMODE,
4304                 .doit = nl80211_testmode_do,
4305                 .policy = nl80211_policy,
4306                 .flags = GENL_ADMIN_PERM,
4307         },
4308 #endif
4309         {
4310                 .cmd = NL80211_CMD_CONNECT,
4311                 .doit = nl80211_connect,
4312                 .policy = nl80211_policy,
4313                 .flags = GENL_ADMIN_PERM,
4314         },
4315         {
4316                 .cmd = NL80211_CMD_DISCONNECT,
4317                 .doit = nl80211_disconnect,
4318                 .policy = nl80211_policy,
4319                 .flags = GENL_ADMIN_PERM,
4320         },
4321         {
4322                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4323                 .doit = nl80211_wiphy_netns,
4324                 .policy = nl80211_policy,
4325                 .flags = GENL_ADMIN_PERM,
4326         },
4327 };
4328 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4329         .name = "mlme",
4330 };
4331
4332 /* multicast groups */
4333 static struct genl_multicast_group nl80211_config_mcgrp = {
4334         .name = "config",
4335 };
4336 static struct genl_multicast_group nl80211_scan_mcgrp = {
4337         .name = "scan",
4338 };
4339 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4340         .name = "regulatory",
4341 };
4342
4343 /* notification functions */
4344
4345 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4346 {
4347         struct sk_buff *msg;
4348
4349         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4350         if (!msg)
4351                 return;
4352
4353         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4354                 nlmsg_free(msg);
4355                 return;
4356         }
4357
4358         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4359                                 nl80211_config_mcgrp.id, GFP_KERNEL);
4360 }
4361
4362 static int nl80211_add_scan_req(struct sk_buff *msg,
4363                                 struct cfg80211_registered_device *rdev)
4364 {
4365         struct cfg80211_scan_request *req = rdev->scan_req;
4366         struct nlattr *nest;
4367         int i;
4368
4369         ASSERT_RDEV_LOCK(rdev);
4370
4371         if (WARN_ON(!req))
4372                 return 0;
4373
4374         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4375         if (!nest)
4376                 goto nla_put_failure;
4377         for (i = 0; i < req->n_ssids; i++)
4378                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4379         nla_nest_end(msg, nest);
4380
4381         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4382         if (!nest)
4383                 goto nla_put_failure;
4384         for (i = 0; i < req->n_channels; i++)
4385                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4386         nla_nest_end(msg, nest);
4387
4388         if (req->ie)
4389                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4390
4391         return 0;
4392  nla_put_failure:
4393         return -ENOBUFS;
4394 }
4395
4396 static int nl80211_send_scan_msg(struct sk_buff *msg,
4397                                  struct cfg80211_registered_device *rdev,
4398                                  struct net_device *netdev,
4399                                  u32 pid, u32 seq, int flags,
4400                                  u32 cmd)
4401 {
4402         void *hdr;
4403
4404         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4405         if (!hdr)
4406                 return -1;
4407
4408         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4409         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4410
4411         /* ignore errors and send incomplete event anyway */
4412         nl80211_add_scan_req(msg, rdev);
4413
4414         return genlmsg_end(msg, hdr);
4415
4416  nla_put_failure:
4417         genlmsg_cancel(msg, hdr);
4418         return -EMSGSIZE;
4419 }
4420
4421 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4422                              struct net_device *netdev)
4423 {
4424         struct sk_buff *msg;
4425
4426         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4427         if (!msg)
4428                 return;
4429
4430         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4431                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
4432                 nlmsg_free(msg);
4433                 return;
4434         }
4435
4436         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4437                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4438 }
4439
4440 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4441                             struct net_device *netdev)
4442 {
4443         struct sk_buff *msg;
4444
4445         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4446         if (!msg)
4447                 return;
4448
4449         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4450                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4451                 nlmsg_free(msg);
4452                 return;
4453         }
4454
4455         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4456                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4457 }
4458
4459 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4460                                struct net_device *netdev)
4461 {
4462         struct sk_buff *msg;
4463
4464         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4465         if (!msg)
4466                 return;
4467
4468         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4469                                   NL80211_CMD_SCAN_ABORTED) < 0) {
4470                 nlmsg_free(msg);
4471                 return;
4472         }
4473
4474         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4475                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4476 }
4477
4478 /*
4479  * This can happen on global regulatory changes or device specific settings
4480  * based on custom world regulatory domains.
4481  */
4482 void nl80211_send_reg_change_event(struct regulatory_request *request)
4483 {
4484         struct sk_buff *msg;
4485         void *hdr;
4486
4487         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4488         if (!msg)
4489                 return;
4490
4491         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
4492         if (!hdr) {
4493                 nlmsg_free(msg);
4494                 return;
4495         }
4496
4497         /* Userspace can always count this one always being set */
4498         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
4499
4500         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
4501                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4502                            NL80211_REGDOM_TYPE_WORLD);
4503         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
4504                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4505                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
4506         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
4507                  request->intersect)
4508                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4509                            NL80211_REGDOM_TYPE_INTERSECTION);
4510         else {
4511                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4512                            NL80211_REGDOM_TYPE_COUNTRY);
4513                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
4514         }
4515
4516         if (wiphy_idx_valid(request->wiphy_idx))
4517                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
4518
4519         if (genlmsg_end(msg, hdr) < 0) {
4520                 nlmsg_free(msg);
4521                 return;
4522         }
4523
4524         rcu_read_lock();
4525         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
4526                                 GFP_ATOMIC);
4527         rcu_read_unlock();
4528
4529         return;
4530
4531 nla_put_failure:
4532         genlmsg_cancel(msg, hdr);
4533         nlmsg_free(msg);
4534 }
4535
4536 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
4537                                     struct net_device *netdev,
4538                                     const u8 *buf, size_t len,
4539                                     enum nl80211_commands cmd, gfp_t gfp)
4540 {
4541         struct sk_buff *msg;
4542         void *hdr;
4543
4544         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4545         if (!msg)
4546                 return;
4547
4548         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4549         if (!hdr) {
4550                 nlmsg_free(msg);
4551                 return;
4552         }
4553
4554         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4555         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4556         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
4557
4558         if (genlmsg_end(msg, hdr) < 0) {
4559                 nlmsg_free(msg);
4560                 return;
4561         }
4562
4563         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4564                                 nl80211_mlme_mcgrp.id, gfp);
4565         return;
4566
4567  nla_put_failure:
4568         genlmsg_cancel(msg, hdr);
4569         nlmsg_free(msg);
4570 }
4571
4572 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
4573                           struct net_device *netdev, const u8 *buf,
4574                           size_t len, gfp_t gfp)
4575 {
4576         nl80211_send_mlme_event(rdev, netdev, buf, len,
4577                                 NL80211_CMD_AUTHENTICATE, gfp);
4578 }
4579
4580 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
4581                            struct net_device *netdev, const u8 *buf,
4582                            size_t len, gfp_t gfp)
4583 {
4584         nl80211_send_mlme_event(rdev, netdev, buf, len,
4585                                 NL80211_CMD_ASSOCIATE, gfp);
4586 }
4587
4588 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
4589                          struct net_device *netdev, const u8 *buf,
4590                          size_t len, gfp_t gfp)
4591 {
4592         nl80211_send_mlme_event(rdev, netdev, buf, len,
4593                                 NL80211_CMD_DEAUTHENTICATE, gfp);
4594 }
4595
4596 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
4597                            struct net_device *netdev, const u8 *buf,
4598                            size_t len, gfp_t gfp)
4599 {
4600         nl80211_send_mlme_event(rdev, netdev, buf, len,
4601                                 NL80211_CMD_DISASSOCIATE, gfp);
4602 }
4603
4604 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
4605                                       struct net_device *netdev, int cmd,
4606                                       const u8 *addr, gfp_t gfp)
4607 {
4608         struct sk_buff *msg;
4609         void *hdr;
4610
4611         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4612         if (!msg)
4613                 return;
4614
4615         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4616         if (!hdr) {
4617                 nlmsg_free(msg);
4618                 return;
4619         }
4620
4621         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4622         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4623         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
4624         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4625
4626         if (genlmsg_end(msg, hdr) < 0) {
4627                 nlmsg_free(msg);
4628                 return;
4629         }
4630
4631         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4632                                 nl80211_mlme_mcgrp.id, gfp);
4633         return;
4634
4635  nla_put_failure:
4636         genlmsg_cancel(msg, hdr);
4637         nlmsg_free(msg);
4638 }
4639
4640 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
4641                                struct net_device *netdev, const u8 *addr,
4642                                gfp_t gfp)
4643 {
4644         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
4645                                   addr, gfp);
4646 }
4647
4648 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
4649                                 struct net_device *netdev, const u8 *addr,
4650                                 gfp_t gfp)
4651 {
4652         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
4653                                   addr, gfp);
4654 }
4655
4656 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
4657                                  struct net_device *netdev, const u8 *bssid,
4658                                  const u8 *req_ie, size_t req_ie_len,
4659                                  const u8 *resp_ie, size_t resp_ie_len,
4660                                  u16 status, gfp_t gfp)
4661 {
4662         struct sk_buff *msg;
4663         void *hdr;
4664
4665         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4666         if (!msg)
4667                 return;
4668
4669         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
4670         if (!hdr) {
4671                 nlmsg_free(msg);
4672                 return;
4673         }
4674
4675         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4676         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4677         if (bssid)
4678                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4679         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
4680         if (req_ie)
4681                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4682         if (resp_ie)
4683                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4684
4685         if (genlmsg_end(msg, hdr) < 0) {
4686                 nlmsg_free(msg);
4687                 return;
4688         }
4689
4690         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4691                                 nl80211_mlme_mcgrp.id, gfp);
4692         return;
4693
4694  nla_put_failure:
4695         genlmsg_cancel(msg, hdr);
4696         nlmsg_free(msg);
4697
4698 }
4699
4700 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
4701                          struct net_device *netdev, const u8 *bssid,
4702                          const u8 *req_ie, size_t req_ie_len,
4703                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
4704 {
4705         struct sk_buff *msg;
4706         void *hdr;
4707
4708         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4709         if (!msg)
4710                 return;
4711
4712         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
4713         if (!hdr) {
4714                 nlmsg_free(msg);
4715                 return;
4716         }
4717
4718         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4719         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4720         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4721         if (req_ie)
4722                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4723         if (resp_ie)
4724                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4725
4726         if (genlmsg_end(msg, hdr) < 0) {
4727                 nlmsg_free(msg);
4728                 return;
4729         }
4730
4731         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4732                                 nl80211_mlme_mcgrp.id, gfp);
4733         return;
4734
4735  nla_put_failure:
4736         genlmsg_cancel(msg, hdr);
4737         nlmsg_free(msg);
4738
4739 }
4740
4741 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
4742                                struct net_device *netdev, u16 reason,
4743                                const u8 *ie, size_t ie_len, bool from_ap)
4744 {
4745         struct sk_buff *msg;
4746         void *hdr;
4747
4748         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4749         if (!msg)
4750                 return;
4751
4752         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
4753         if (!hdr) {
4754                 nlmsg_free(msg);
4755                 return;
4756         }
4757
4758         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4759         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4760         if (from_ap && reason)
4761                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
4762         if (from_ap)
4763                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
4764         if (ie)
4765                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
4766
4767         if (genlmsg_end(msg, hdr) < 0) {
4768                 nlmsg_free(msg);
4769                 return;
4770         }
4771
4772         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4773                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
4774         return;
4775
4776  nla_put_failure:
4777         genlmsg_cancel(msg, hdr);
4778         nlmsg_free(msg);
4779
4780 }
4781
4782 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
4783                              struct net_device *netdev, const u8 *bssid,
4784                              gfp_t gfp)
4785 {
4786         struct sk_buff *msg;
4787         void *hdr;
4788
4789         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4790         if (!msg)
4791                 return;
4792
4793         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
4794         if (!hdr) {
4795                 nlmsg_free(msg);
4796                 return;
4797         }
4798
4799         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4800         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4801         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4802
4803         if (genlmsg_end(msg, hdr) < 0) {
4804                 nlmsg_free(msg);
4805                 return;
4806         }
4807
4808         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4809                                 nl80211_mlme_mcgrp.id, gfp);
4810         return;
4811
4812  nla_put_failure:
4813         genlmsg_cancel(msg, hdr);
4814         nlmsg_free(msg);
4815 }
4816
4817 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
4818                                  struct net_device *netdev, const u8 *addr,
4819                                  enum nl80211_key_type key_type, int key_id,
4820                                  const u8 *tsc, gfp_t gfp)
4821 {
4822         struct sk_buff *msg;
4823         void *hdr;
4824
4825         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4826         if (!msg)
4827                 return;
4828
4829         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
4830         if (!hdr) {
4831                 nlmsg_free(msg);
4832                 return;
4833         }
4834
4835         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4836         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4837         if (addr)
4838                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4839         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
4840         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
4841         if (tsc)
4842                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
4843
4844         if (genlmsg_end(msg, hdr) < 0) {
4845                 nlmsg_free(msg);
4846                 return;
4847         }
4848
4849         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4850                                 nl80211_mlme_mcgrp.id, gfp);
4851         return;
4852
4853  nla_put_failure:
4854         genlmsg_cancel(msg, hdr);
4855         nlmsg_free(msg);
4856 }
4857
4858 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
4859                                     struct ieee80211_channel *channel_before,
4860                                     struct ieee80211_channel *channel_after)
4861 {
4862         struct sk_buff *msg;
4863         void *hdr;
4864         struct nlattr *nl_freq;
4865
4866         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4867         if (!msg)
4868                 return;
4869
4870         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
4871         if (!hdr) {
4872                 nlmsg_free(msg);
4873                 return;
4874         }
4875
4876         /*
4877          * Since we are applying the beacon hint to a wiphy we know its
4878          * wiphy_idx is valid
4879          */
4880         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
4881
4882         /* Before */
4883         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
4884         if (!nl_freq)
4885                 goto nla_put_failure;
4886         if (nl80211_msg_put_channel(msg, channel_before))
4887                 goto nla_put_failure;
4888         nla_nest_end(msg, nl_freq);
4889
4890         /* After */
4891         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
4892         if (!nl_freq)
4893                 goto nla_put_failure;
4894         if (nl80211_msg_put_channel(msg, channel_after))
4895                 goto nla_put_failure;
4896         nla_nest_end(msg, nl_freq);
4897
4898         if (genlmsg_end(msg, hdr) < 0) {
4899                 nlmsg_free(msg);
4900                 return;
4901         }
4902
4903         rcu_read_lock();
4904         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
4905                                 GFP_ATOMIC);
4906         rcu_read_unlock();
4907
4908         return;
4909
4910 nla_put_failure:
4911         genlmsg_cancel(msg, hdr);
4912         nlmsg_free(msg);
4913 }
4914
4915 /* initialisation/exit functions */
4916
4917 int nl80211_init(void)
4918 {
4919         int err;
4920
4921         err = genl_register_family_with_ops(&nl80211_fam,
4922                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
4923         if (err)
4924                 return err;
4925
4926         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
4927         if (err)
4928                 goto err_out;
4929
4930         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
4931         if (err)
4932                 goto err_out;
4933
4934         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
4935         if (err)
4936                 goto err_out;
4937
4938         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
4939         if (err)
4940                 goto err_out;
4941
4942 #ifdef CONFIG_NL80211_TESTMODE
4943         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
4944         if (err)
4945                 goto err_out;
4946 #endif
4947
4948         return 0;
4949  err_out:
4950         genl_unregister_family(&nl80211_fam);
4951         return err;
4952 }
4953
4954 void nl80211_exit(void)
4955 {
4956         genl_unregister_family(&nl80211_fam);
4957 }