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         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  73
  74         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  75         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  76         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  77
  78         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  79         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  80
  81         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  82         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  83                                     .len = WLAN_MAX_KEY_LEN },
  84         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  85         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  86         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  87         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  88
  89         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  90         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  91         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  92                                        .len = IEEE80211_MAX_DATA_LEN },
  93         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  94                                        .len = IEEE80211_MAX_DATA_LEN },
  95         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  96         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  97         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  98         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  99                                                .len = NL80211_MAX_SUPP_RATES },
 100         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 101         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 102         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 103         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 104                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 105         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 106
 107         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 108         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 109
 110         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 111         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 113         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 114                                            .len = NL80211_MAX_SUPP_RATES },
 115
 116         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 117
 118         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 119                                          .len = NL80211_HT_CAPABILITY_LEN },
 120
 121         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 122         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 123                               .len = IEEE80211_MAX_DATA_LEN },
 124         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 125         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 126
 127         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 128                                 .len = IEEE80211_MAX_SSID_LEN },
 129         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 130         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 131         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 132         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 134         [NL80211_ATTR_STA_FLAGS2] = {
 135                 .len = sizeof(struct nl80211_sta_flag_update),
 136         },
 137         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 138         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 139         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 140         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 141         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 142         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 143         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 144                                  .len = WLAN_PMKID_LEN },
 145         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 146         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 147         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 148 };
 149
 150 /* policy for the attributes */
 151 static struct nla_policy
 152 nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
 153         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 154         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 155         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 156         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 157         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 158         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 159 };
 160
 161 /* ifidx get helper */
 162 static int nl80211_get_ifidx(struct netlink_callback *cb)
 163 {
 164         int res;
 165
 166         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 167                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 168                           nl80211_policy);
 169         if (res)
 170                 return res;
 171
 172         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 173                 return -EINVAL;
 174
 175         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 176         if (!res)
 177                 return -EINVAL;
 178         return res;
 179 }
 180
 181 /* IE validation */
 182 static bool is_valid_ie_attr(const struct nlattr *attr)
 183 {
 184         const u8 *pos;
 185         int len;
 186
 187         if (!attr)
 188                 return true;
 189
 190         pos = nla_data(attr);
 191         len = nla_len(attr);
 192
 193         while (len) {
 194                 u8 elemlen;
 195
 196                 if (len < 2)
 197                         return false;
 198                 len -= 2;
 199
 200                 elemlen = pos[1];
 201                 if (elemlen > len)
 202                         return false;
 203
 204                 len -= elemlen;
 205                 pos += 2 + elemlen;
 206         }
 207
 208         return true;
 209 }
 210
 211 /* message building helper */
 212 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 213                                    int flags, u8 cmd)
 214 {
 215         /* since there is no private header just add the generic one */
 216         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 217 }
 218
 219 static int nl80211_msg_put_channel(struct sk_buff *msg,
 220                                    struct ieee80211_channel *chan)
 221 {
 222         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 223                     chan->center_freq);
 224
 225         if (chan->flags & IEEE80211_CHAN_DISABLED)
 226                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 227         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 228                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 229         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 230                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 231         if (chan->flags & IEEE80211_CHAN_RADAR)
 232                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 233
 234         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 235                     DBM_TO_MBM(chan->max_power));
 236
 237         return 0;
 238
 239  nla_put_failure:
 240         return -ENOBUFS;
 241 }
 242
 243 /* netlink command implementations */
 244
 245 struct key_parse {
 246         struct key_params p;
 247         int idx;
 248         bool def, defmgmt;
 249 };
 250
 251 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 252 {
 253         struct nlattr *tb[NL80211_KEY_MAX + 1];
 254         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 255                                    nl80211_key_policy);
 256         if (err)
 257                 return err;
 258
 259         k->def = !!tb[NL80211_KEY_DEFAULT];
 260         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 261
 262         if (tb[NL80211_KEY_IDX])
 263                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 264
 265         if (tb[NL80211_KEY_DATA]) {
 266                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 267                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 268         }
 269
 270         if (tb[NL80211_KEY_SEQ]) {
 271                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 272                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 273         }
 274
 275         if (tb[NL80211_KEY_CIPHER])
 276                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 277
 278         return 0;
 279 }
 280
 281 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 282 {
 283         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 284                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 285                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 286         }
 287
 288         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 289                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 290                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 291         }
 292
 293         if (info->attrs[NL80211_ATTR_KEY_IDX])
 294                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 295
 296         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 297                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 298
 299         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 300         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 301
 302         return 0;
 303 }
 304
 305 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 306 {
 307         int err;
 308
 309         memset(k, 0, sizeof(*k));
 310         k->idx = -1;
 311
 312         if (info->attrs[NL80211_ATTR_KEY])
 313                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 314         else
 315                 err = nl80211_parse_key_old(info, k);
 316
 317         if (err)
 318                 return err;
 319
 320         if (k->def && k->defmgmt)
 321                 return -EINVAL;
 322
 323         if (k->idx != -1) {
 324                 if (k->defmgmt) {
 325                         if (k->idx < 4 || k->idx > 5)
 326                                 return -EINVAL;
 327                 } else if (k->def) {
 328                         if (k->idx < 0 || k->idx > 3)
 329                                 return -EINVAL;
 330                 } else {
 331                         if (k->idx < 0 || k->idx > 5)
 332                                 return -EINVAL;
 333                 }
 334         }
 335
 336         return 0;
 337 }
 338
 339 static struct cfg80211_cached_keys *
 340 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 341                        struct nlattr *keys)
 342 {
 343         struct key_parse parse;
 344         struct nlattr *key;
 345         struct cfg80211_cached_keys *result;
 346         int rem, err, def = 0;
 347
 348         result = kzalloc(sizeof(*result), GFP_KERNEL);
 349         if (!result)
 350                 return ERR_PTR(-ENOMEM);
 351
 352         result->def = -1;
 353         result->defmgmt = -1;
 354
 355         nla_for_each_nested(key, keys, rem) {
 356                 memset(&parse, 0, sizeof(parse));
 357                 parse.idx = -1;
 358
 359                 err = nl80211_parse_key_new(key, &parse);
 360                 if (err)
 361                         goto error;
 362                 err = -EINVAL;
 363                 if (!parse.p.key)
 364                         goto error;
 365                 if (parse.idx < 0 || parse.idx > 4)
 366                         goto error;
 367                 if (parse.def) {
 368                         if (def)
 369                                 goto error;
 370                         def = 1;
 371                         result->def = parse.idx;
 372                 } else if (parse.defmgmt)
 373                         goto error;
 374                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 375                                                      parse.idx, NULL);
 376                 if (err)
 377                         goto error;
 378                 result->params[parse.idx].cipher = parse.p.cipher;
 379                 result->params[parse.idx].key_len = parse.p.key_len;
 380                 result->params[parse.idx].key = result->data[parse.idx];
 381                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 382         }
 383
 384         return result;
 385  error:
 386         kfree(result);
 387         return ERR_PTR(err);
 388 }
 389
 390 static int nl80211_key_allowed(struct wireless_dev *wdev)
 391 {
 392         ASSERT_WDEV_LOCK(wdev);
 393
 394         if (!netif_running(wdev->netdev))
 395                 return -ENETDOWN;
 396
 397         switch (wdev->iftype) {
 398         case NL80211_IFTYPE_AP:
 399         case NL80211_IFTYPE_AP_VLAN:
 400                 break;
 401         case NL80211_IFTYPE_ADHOC:
 402                 if (!wdev->current_bss)
 403                         return -ENOLINK;
 404                 break;
 405         case NL80211_IFTYPE_STATION:
 406                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 407                         return -ENOLINK;
 408                 break;
 409         default:
 410                 return -EINVAL;
 411         }
 412
 413         return 0;
 414 }
 415
 416 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 417                               struct cfg80211_registered_device *dev)
 418 {
 419         void *hdr;
 420         struct nlattr *nl_bands, *nl_band;
 421         struct nlattr *nl_freqs, *nl_freq;
 422         struct nlattr *nl_rates, *nl_rate;
 423         struct nlattr *nl_modes;
 424         struct nlattr *nl_cmds;
 425         enum ieee80211_band band;
 426         struct ieee80211_channel *chan;
 427         struct ieee80211_rate *rate;
 428         int i;
 429         u16 ifmodes = dev->wiphy.interface_modes;
 430
 431         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 432         if (!hdr)
 433                 return -1;
 434
 435         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 436         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 437
 438         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 439                     cfg80211_rdev_list_generation);
 440
 441         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 442                    dev->wiphy.retry_short);
 443         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 444                    dev->wiphy.retry_long);
 445         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 446                     dev->wiphy.frag_threshold);
 447         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 448                     dev->wiphy.rts_threshold);
 449         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 450                     dev->wiphy.coverage_class);
 451
 452         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 453                    dev->wiphy.max_scan_ssids);
 454         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 455                     dev->wiphy.max_scan_ie_len);
 456
 457         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 458                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 459                 dev->wiphy.cipher_suites);
 460
 461         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 462                    dev->wiphy.max_num_pmkids);
 463
 464         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 465         if (!nl_modes)
 466                 goto nla_put_failure;
 467
 468         i = 0;
 469         while (ifmodes) {
 470                 if (ifmodes & 1)
 471                         NLA_PUT_FLAG(msg, i);
 472                 ifmodes >>= 1;
 473                 i++;
 474         }
 475
 476         nla_nest_end(msg, nl_modes);
 477
 478         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 479         if (!nl_bands)
 480                 goto nla_put_failure;
 481
 482         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 483                 if (!dev->wiphy.bands[band])
 484                         continue;
 485
 486                 nl_band = nla_nest_start(msg, band);
 487                 if (!nl_band)
 488                         goto nla_put_failure;
 489
 490                 /* add HT info */
 491                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 492                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 493                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 494                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 495                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 496                                 dev->wiphy.bands[band]->ht_cap.cap);
 497                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 498                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 499                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 500                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 501                 }
 502
 503                 /* add frequencies */
 504                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 505                 if (!nl_freqs)
 506                         goto nla_put_failure;
 507
 508                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 509                         nl_freq = nla_nest_start(msg, i);
 510                         if (!nl_freq)
 511                                 goto nla_put_failure;
 512
 513                         chan = &dev->wiphy.bands[band]->channels[i];
 514
 515                         if (nl80211_msg_put_channel(msg, chan))
 516                                 goto nla_put_failure;
 517
 518                         nla_nest_end(msg, nl_freq);
 519                 }
 520
 521                 nla_nest_end(msg, nl_freqs);
 522
 523                 /* add bitrates */
 524                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 525                 if (!nl_rates)
 526                         goto nla_put_failure;
 527
 528                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 529                         nl_rate = nla_nest_start(msg, i);
 530                         if (!nl_rate)
 531                                 goto nla_put_failure;
 532
 533                         rate = &dev->wiphy.bands[band]->bitrates[i];
 534                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 535                                     rate->bitrate);
 536                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 537                                 NLA_PUT_FLAG(msg,
 538                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 539
 540                         nla_nest_end(msg, nl_rate);
 541                 }
 542
 543                 nla_nest_end(msg, nl_rates);
 544
 545                 nla_nest_end(msg, nl_band);
 546         }
 547         nla_nest_end(msg, nl_bands);
 548
 549         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 550         if (!nl_cmds)
 551                 goto nla_put_failure;
 552
 553         i = 0;
 554 #define CMD(op, n)                                              \
 555          do {                                                   \
 556                 if (dev->ops->op) {                             \
 557                         i++;                                    \
 558                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 559                 }                                               \
 560         } while (0)
 561
 562         CMD(add_virtual_intf, NEW_INTERFACE);
 563         CMD(change_virtual_intf, SET_INTERFACE);
 564         CMD(add_key, NEW_KEY);
 565         CMD(add_beacon, NEW_BEACON);
 566         CMD(add_station, NEW_STATION);
 567         CMD(add_mpath, NEW_MPATH);
 568         CMD(set_mesh_params, SET_MESH_PARAMS);
 569         CMD(change_bss, SET_BSS);
 570         CMD(auth, AUTHENTICATE);
 571         CMD(assoc, ASSOCIATE);
 572         CMD(deauth, DEAUTHENTICATE);
 573         CMD(disassoc, DISASSOCIATE);
 574         CMD(join_ibss, JOIN_IBSS);
 575         CMD(set_pmksa, SET_PMKSA);
 576         CMD(del_pmksa, DEL_PMKSA);
 577         CMD(flush_pmksa, FLUSH_PMKSA);
 578         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 579         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 580         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 581                 i++;
 582                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 583         }
 584
 585 #undef CMD
 586
 587         if (dev->ops->connect || dev->ops->auth) {
 588                 i++;
 589                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 590         }
 591
 592         if (dev->ops->disconnect || dev->ops->deauth) {
 593                 i++;
 594                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 595         }
 596
 597         nla_nest_end(msg, nl_cmds);
 598
 599         return genlmsg_end(msg, hdr);
 600
 601  nla_put_failure:
 602         genlmsg_cancel(msg, hdr);
 603         return -EMSGSIZE;
 604 }
 605
 606 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 607 {
 608         int idx = 0;
 609         int start = cb->args[0];
 610         struct cfg80211_registered_device *dev;
 611
 612         mutex_lock(&cfg80211_mutex);
 613         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 614                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 615                         continue;
 616                 if (++idx <= start)
 617                         continue;
 618                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 619                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 620                                        dev) < 0) {
 621                         idx--;
 622                         break;
 623                 }
 624         }
 625         mutex_unlock(&cfg80211_mutex);
 626
 627         cb->args[0] = idx;
 628
 629         return skb->len;
 630 }
 631
 632 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 633 {
 634         struct sk_buff *msg;
 635         struct cfg80211_registered_device *dev;
 636
 637         dev = cfg80211_get_dev_from_info(info);
 638         if (IS_ERR(dev))
 639                 return PTR_ERR(dev);
 640
 641         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 642         if (!msg)
 643                 goto out_err;
 644
 645         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 646                 goto out_free;
 647
 648         cfg80211_unlock_rdev(dev);
 649
 650         return genlmsg_reply(msg, info);
 651
 652  out_free:
 653         nlmsg_free(msg);
 654  out_err:
 655         cfg80211_unlock_rdev(dev);
 656         return -ENOBUFS;
 657 }
 658
 659 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 660         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 661         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 662         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 663         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 664         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 665 };
 666
 667 static int parse_txq_params(struct nlattr *tb[],
 668                             struct ieee80211_txq_params *txq_params)
 669 {
 670         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 671             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 672             !tb[NL80211_TXQ_ATTR_AIFS])
 673                 return -EINVAL;
 674
 675         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 676         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 677         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 678         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 679         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 680
 681         return 0;
 682 }
 683
 684 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 685 {
 686         struct cfg80211_registered_device *rdev;
 687         int result = 0, rem_txq_params = 0;
 688         struct nlattr *nl_txq_params;
 689         u32 changed;
 690         u8 retry_short = 0, retry_long = 0;
 691         u32 frag_threshold = 0, rts_threshold = 0;
 692         u8 coverage_class = 0;
 693
 694         rtnl_lock();
 695
 696         mutex_lock(&cfg80211_mutex);
 697
 698         rdev = __cfg80211_rdev_from_info(info);
 699         if (IS_ERR(rdev)) {
 700                 mutex_unlock(&cfg80211_mutex);
 701                 result = PTR_ERR(rdev);
 702                 goto unlock;
 703         }
 704
 705         mutex_lock(&rdev->mtx);
 706
 707         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 708                 result = cfg80211_dev_rename(
 709                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 710
 711         mutex_unlock(&cfg80211_mutex);
 712
 713         if (result)
 714                 goto bad_res;
 715
 716         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 717                 struct ieee80211_txq_params txq_params;
 718                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 719
 720                 if (!rdev->ops->set_txq_params) {
 721                         result = -EOPNOTSUPP;
 722                         goto bad_res;
 723                 }
 724
 725                 nla_for_each_nested(nl_txq_params,
 726                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 727                                     rem_txq_params) {
 728                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 729                                   nla_data(nl_txq_params),
 730                                   nla_len(nl_txq_params),
 731                                   txq_params_policy);
 732                         result = parse_txq_params(tb, &txq_params);
 733                         if (result)
 734                                 goto bad_res;
 735
 736                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 737                                                            &txq_params);
 738                         if (result)
 739                                 goto bad_res;
 740                 }
 741         }
 742
 743         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 744                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 745                 u32 freq;
 746
 747                 result = -EINVAL;
 748
 749                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 750                         channel_type = nla_get_u32(info->attrs[
 751                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 752                         if (channel_type != NL80211_CHAN_NO_HT &&
 753                             channel_type != NL80211_CHAN_HT20 &&
 754                             channel_type != NL80211_CHAN_HT40PLUS &&
 755                             channel_type != NL80211_CHAN_HT40MINUS)
 756                                 goto bad_res;
 757                 }
 758
 759                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 760
 761                 mutex_lock(&rdev->devlist_mtx);
 762                 result = rdev_set_freq(rdev, NULL, freq, channel_type);
 763                 mutex_unlock(&rdev->devlist_mtx);
 764                 if (result)
 765                         goto bad_res;
 766         }
 767
 768         changed = 0;
 769
 770         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 771                 retry_short = nla_get_u8(
 772                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 773                 if (retry_short == 0) {
 774                         result = -EINVAL;
 775                         goto bad_res;
 776                 }
 777                 changed |= WIPHY_PARAM_RETRY_SHORT;
 778         }
 779
 780         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 781                 retry_long = nla_get_u8(
 782                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 783                 if (retry_long == 0) {
 784                         result = -EINVAL;
 785                         goto bad_res;
 786                 }
 787                 changed |= WIPHY_PARAM_RETRY_LONG;
 788         }
 789
 790         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 791                 frag_threshold = nla_get_u32(
 792                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 793                 if (frag_threshold < 256) {
 794                         result = -EINVAL;
 795                         goto bad_res;
 796                 }
 797                 if (frag_threshold != (u32) -1) {
 798                         /*
 799                          * Fragments (apart from the last one) are required to
 800                          * have even length. Make the fragmentation code
 801                          * simpler by stripping LSB should someone try to use
 802                          * odd threshold value.
 803                          */
 804                         frag_threshold &= ~0x1;
 805                 }
 806                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 807         }
 808
 809         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 810                 rts_threshold = nla_get_u32(
 811                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 812                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 813         }
 814
 815         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 816                 coverage_class = nla_get_u8(
 817                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 818                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
 819         }
 820
 821         if (changed) {
 822                 u8 old_retry_short, old_retry_long;
 823                 u32 old_frag_threshold, old_rts_threshold;
 824                 u8 old_coverage_class;
 825
 826                 if (!rdev->ops->set_wiphy_params) {
 827                         result = -EOPNOTSUPP;
 828                         goto bad_res;
 829                 }
 830
 831                 old_retry_short = rdev->wiphy.retry_short;
 832                 old_retry_long = rdev->wiphy.retry_long;
 833                 old_frag_threshold = rdev->wiphy.frag_threshold;
 834                 old_rts_threshold = rdev->wiphy.rts_threshold;
 835                 old_coverage_class = rdev->wiphy.coverage_class;
 836
 837                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 838                         rdev->wiphy.retry_short = retry_short;
 839                 if (changed & WIPHY_PARAM_RETRY_LONG)
 840                         rdev->wiphy.retry_long = retry_long;
 841                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 842                         rdev->wiphy.frag_threshold = frag_threshold;
 843                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 844                         rdev->wiphy.rts_threshold = rts_threshold;
 845                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
 846                         rdev->wiphy.coverage_class = coverage_class;
 847
 848                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 849                 if (result) {
 850                         rdev->wiphy.retry_short = old_retry_short;
 851                         rdev->wiphy.retry_long = old_retry_long;
 852                         rdev->wiphy.frag_threshold = old_frag_threshold;
 853                         rdev->wiphy.rts_threshold = old_rts_threshold;
 854                         rdev->wiphy.coverage_class = old_coverage_class;
 855                 }
 856         }
 857
 858  bad_res:
 859         mutex_unlock(&rdev->mtx);
 860  unlock:
 861         rtnl_unlock();
 862         return result;
 863 }
 864
 865
 866 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 867                               struct cfg80211_registered_device *rdev,
 868                               struct net_device *dev)
 869 {
 870         void *hdr;
 871
 872         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 873         if (!hdr)
 874                 return -1;
 875
 876         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 877         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 878         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 879         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 880
 881         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 882                     rdev->devlist_generation ^
 883                         (cfg80211_rdev_list_generation << 2));
 884
 885         return genlmsg_end(msg, hdr);
 886
 887  nla_put_failure:
 888         genlmsg_cancel(msg, hdr);
 889         return -EMSGSIZE;
 890 }
 891
 892 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 893 {
 894         int wp_idx = 0;
 895         int if_idx = 0;
 896         int wp_start = cb->args[0];
 897         int if_start = cb->args[1];
 898         struct cfg80211_registered_device *rdev;
 899         struct wireless_dev *wdev;
 900
 901         mutex_lock(&cfg80211_mutex);
 902         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 903                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
 904                         continue;
 905                 if (wp_idx < wp_start) {
 906                         wp_idx++;
 907                         continue;
 908                 }
 909                 if_idx = 0;
 910
 911                 mutex_lock(&rdev->devlist_mtx);
 912                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
 913                         if (if_idx < if_start) {
 914                                 if_idx++;
 915                                 continue;
 916                         }
 917                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 918                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 919                                                rdev, wdev->netdev) < 0) {
 920                                 mutex_unlock(&rdev->devlist_mtx);
 921                                 goto out;
 922                         }
 923                         if_idx++;
 924                 }
 925                 mutex_unlock(&rdev->devlist_mtx);
 926
 927                 wp_idx++;
 928         }
 929  out:
 930         mutex_unlock(&cfg80211_mutex);
 931
 932         cb->args[0] = wp_idx;
 933         cb->args[1] = if_idx;
 934
 935         return skb->len;
 936 }
 937
 938 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 939 {
 940         struct sk_buff *msg;
 941         struct cfg80211_registered_device *dev;
 942         struct net_device *netdev;
 943         int err;
 944
 945         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
 946         if (err)
 947                 return err;
 948
 949         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 950         if (!msg)
 951                 goto out_err;
 952
 953         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
 954                                dev, netdev) < 0)
 955                 goto out_free;
 956
 957         dev_put(netdev);
 958         cfg80211_unlock_rdev(dev);
 959
 960         return genlmsg_reply(msg, info);
 961
 962  out_free:
 963         nlmsg_free(msg);
 964  out_err:
 965         dev_put(netdev);
 966         cfg80211_unlock_rdev(dev);
 967         return -ENOBUFS;
 968 }
 969
 970 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 971         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 972         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 973         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 974         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 975         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 976 };
 977
 978 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 979 {
 980         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 981         int flag;
 982
 983         *mntrflags = 0;
 984
 985         if (!nla)
 986                 return -EINVAL;
 987
 988         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 989                              nla, mntr_flags_policy))
 990                 return -EINVAL;
 991
 992         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 993                 if (flags[flag])
 994                         *mntrflags |= (1<<flag);
 995
 996         return 0;
 997 }
 998
 999 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1000                                struct net_device *netdev, u8 use_4addr,
1001                                enum nl80211_iftype iftype)
1002 {
1003         if (!use_4addr) {
1004                 if (netdev && netdev->br_port)
1005                         return -EBUSY;
1006                 return 0;
1007         }
1008
1009         switch (iftype) {
1010         case NL80211_IFTYPE_AP_VLAN:
1011                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1012                         return 0;
1013                 break;
1014         case NL80211_IFTYPE_STATION:
1015                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1016                         return 0;
1017                 break;
1018         default:
1019                 break;
1020         }
1021
1022         return -EOPNOTSUPP;
1023 }
1024
1025 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1026 {
1027         struct cfg80211_registered_device *rdev;
1028         struct vif_params params;
1029         int err;
1030         enum nl80211_iftype otype, ntype;
1031         struct net_device *dev;
1032         u32 _flags, *flags = NULL;
1033         bool change = false;
1034
1035         memset(&params, 0, sizeof(params));
1036
1037         rtnl_lock();
1038
1039         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1040         if (err)
1041                 goto unlock_rtnl;
1042
1043         otype = ntype = dev->ieee80211_ptr->iftype;
1044
1045         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1046                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1047                 if (otype != ntype)
1048                         change = true;
1049                 if (ntype > NL80211_IFTYPE_MAX) {
1050                         err = -EINVAL;
1051                         goto unlock;
1052                 }
1053         }
1054
1055         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1056                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1057                         err = -EINVAL;
1058                         goto unlock;
1059                 }
1060                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1061                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1062                 change = true;
1063         }
1064
1065         if (info->attrs[NL80211_ATTR_4ADDR]) {
1066                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1067                 change = true;
1068                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1069                 if (err)
1070                         goto unlock;
1071         } else {
1072                 params.use_4addr = -1;
1073         }
1074
1075         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1076                 if (ntype != NL80211_IFTYPE_MONITOR) {
1077                         err = -EINVAL;
1078                         goto unlock;
1079                 }
1080                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1081                                           &_flags);
1082                 if (err)
1083                         goto unlock;
1084
1085                 flags = &_flags;
1086                 change = true;
1087         }
1088
1089         if (change)
1090                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1091         else
1092                 err = 0;
1093
1094         if (!err && params.use_4addr != -1)
1095                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1096
1097  unlock:
1098         dev_put(dev);
1099         cfg80211_unlock_rdev(rdev);
1100  unlock_rtnl:
1101         rtnl_unlock();
1102         return err;
1103 }
1104
1105 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1106 {
1107         struct cfg80211_registered_device *rdev;
1108         struct vif_params params;
1109         int err;
1110         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1111         u32 flags;
1112
1113         memset(&params, 0, sizeof(params));
1114
1115         if (!info->attrs[NL80211_ATTR_IFNAME])
1116                 return -EINVAL;
1117
1118         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1119                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1120                 if (type > NL80211_IFTYPE_MAX)
1121                         return -EINVAL;
1122         }
1123
1124         rtnl_lock();
1125
1126         rdev = cfg80211_get_dev_from_info(info);
1127         if (IS_ERR(rdev)) {
1128                 err = PTR_ERR(rdev);
1129                 goto unlock_rtnl;
1130         }
1131
1132         if (!rdev->ops->add_virtual_intf ||
1133             !(rdev->wiphy.interface_modes & (1 << type))) {
1134                 err = -EOPNOTSUPP;
1135                 goto unlock;
1136         }
1137
1138         if (type == NL80211_IFTYPE_MESH_POINT &&
1139             info->attrs[NL80211_ATTR_MESH_ID]) {
1140                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1141                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1142         }
1143
1144         if (info->attrs[NL80211_ATTR_4ADDR]) {
1145                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1146                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1147                 if (err)
1148                         goto unlock;
1149         }
1150
1151         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1152                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1153                                   &flags);
1154         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1155                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1156                 type, err ? NULL : &flags, &params);
1157
1158  unlock:
1159         cfg80211_unlock_rdev(rdev);
1160  unlock_rtnl:
1161         rtnl_unlock();
1162         return err;
1163 }
1164
1165 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1166 {
1167         struct cfg80211_registered_device *rdev;
1168         int err;
1169         struct net_device *dev;
1170
1171         rtnl_lock();
1172
1173         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1174         if (err)
1175                 goto unlock_rtnl;
1176
1177         if (!rdev->ops->del_virtual_intf) {
1178                 err = -EOPNOTSUPP;
1179                 goto out;
1180         }
1181
1182         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1183
1184  out:
1185         cfg80211_unlock_rdev(rdev);
1186         dev_put(dev);
1187  unlock_rtnl:
1188         rtnl_unlock();
1189         return err;
1190 }
1191
1192 struct get_key_cookie {
1193         struct sk_buff *msg;
1194         int error;
1195         int idx;
1196 };
1197
1198 static void get_key_callback(void *c, struct key_params *params)
1199 {
1200         struct nlattr *key;
1201         struct get_key_cookie *cookie = c;
1202
1203         if (params->key)
1204                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1205                         params->key_len, params->key);
1206
1207         if (params->seq)
1208                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1209                         params->seq_len, params->seq);
1210
1211         if (params->cipher)
1212                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1213                             params->cipher);
1214
1215         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1216         if (!key)
1217                 goto nla_put_failure;
1218
1219         if (params->key)
1220                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1221                         params->key_len, params->key);
1222
1223         if (params->seq)
1224                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1225                         params->seq_len, params->seq);
1226
1227         if (params->cipher)
1228                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1229                             params->cipher);
1230
1231         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1232
1233         nla_nest_end(cookie->msg, key);
1234
1235         return;
1236  nla_put_failure:
1237         cookie->error = 1;
1238 }
1239
1240 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1241 {
1242         struct cfg80211_registered_device *rdev;
1243         int err;
1244         struct net_device *dev;
1245         u8 key_idx = 0;
1246         u8 *mac_addr = NULL;
1247         struct get_key_cookie cookie = {
1248                 .error = 0,
1249         };
1250         void *hdr;
1251         struct sk_buff *msg;
1252
1253         if (info->attrs[NL80211_ATTR_KEY_IDX])
1254                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1255
1256         if (key_idx > 5)
1257                 return -EINVAL;
1258
1259         if (info->attrs[NL80211_ATTR_MAC])
1260                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1261
1262         rtnl_lock();
1263
1264         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1265         if (err)
1266                 goto unlock_rtnl;
1267
1268         if (!rdev->ops->get_key) {
1269                 err = -EOPNOTSUPP;
1270                 goto out;
1271         }
1272
1273         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1274         if (!msg) {
1275                 err = -ENOMEM;
1276                 goto out;
1277         }
1278
1279         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1280                              NL80211_CMD_NEW_KEY);
1281
1282         if (IS_ERR(hdr)) {
1283                 err = PTR_ERR(hdr);
1284                 goto free_msg;
1285         }
1286
1287         cookie.msg = msg;
1288         cookie.idx = key_idx;
1289
1290         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1291         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1292         if (mac_addr)
1293                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1294
1295         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1296                                 &cookie, get_key_callback);
1297
1298         if (err)
1299                 goto free_msg;
1300
1301         if (cookie.error)
1302                 goto nla_put_failure;
1303
1304         genlmsg_end(msg, hdr);
1305         err = genlmsg_reply(msg, info);
1306         goto out;
1307
1308  nla_put_failure:
1309         err = -ENOBUFS;
1310  free_msg:
1311         nlmsg_free(msg);
1312  out:
1313         cfg80211_unlock_rdev(rdev);
1314         dev_put(dev);
1315  unlock_rtnl:
1316         rtnl_unlock();
1317
1318         return err;
1319 }
1320
1321 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1322 {
1323         struct cfg80211_registered_device *rdev;
1324         struct key_parse key;
1325         int err;
1326         struct net_device *dev;
1327         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1328                     u8 key_index);
1329
1330         err = nl80211_parse_key(info, &key);
1331         if (err)
1332                 return err;
1333
1334         if (key.idx < 0)
1335                 return -EINVAL;
1336
1337         /* only support setting default key */
1338         if (!key.def && !key.defmgmt)
1339                 return -EINVAL;
1340
1341         rtnl_lock();
1342
1343         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1344         if (err)
1345                 goto unlock_rtnl;
1346
1347         if (key.def)
1348                 func = rdev->ops->set_default_key;
1349         else
1350                 func = rdev->ops->set_default_mgmt_key;
1351
1352         if (!func) {
1353                 err = -EOPNOTSUPP;
1354                 goto out;
1355         }
1356
1357         wdev_lock(dev->ieee80211_ptr);
1358         err = nl80211_key_allowed(dev->ieee80211_ptr);
1359         if (!err)
1360                 err = func(&rdev->wiphy, dev, key.idx);
1361
1362 #ifdef CONFIG_CFG80211_WEXT
1363         if (!err) {
1364                 if (func == rdev->ops->set_default_key)
1365                         dev->ieee80211_ptr->wext.default_key = key.idx;
1366                 else
1367                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1368         }
1369 #endif
1370         wdev_unlock(dev->ieee80211_ptr);
1371
1372  out:
1373         cfg80211_unlock_rdev(rdev);
1374         dev_put(dev);
1375
1376  unlock_rtnl:
1377         rtnl_unlock();
1378
1379         return err;
1380 }
1381
1382 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1383 {
1384         struct cfg80211_registered_device *rdev;
1385         int err;
1386         struct net_device *dev;
1387         struct key_parse key;
1388         u8 *mac_addr = NULL;
1389
1390         err = nl80211_parse_key(info, &key);
1391         if (err)
1392                 return err;
1393
1394         if (!key.p.key)
1395                 return -EINVAL;
1396
1397         if (info->attrs[NL80211_ATTR_MAC])
1398                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1399
1400         rtnl_lock();
1401
1402         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1403         if (err)
1404                 goto unlock_rtnl;
1405
1406         if (!rdev->ops->add_key) {
1407                 err = -EOPNOTSUPP;
1408                 goto out;
1409         }
1410
1411         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1412                 err = -EINVAL;
1413                 goto out;
1414         }
1415
1416         wdev_lock(dev->ieee80211_ptr);
1417         err = nl80211_key_allowed(dev->ieee80211_ptr);
1418         if (!err)
1419                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1420                                          mac_addr, &key.p);
1421         wdev_unlock(dev->ieee80211_ptr);
1422
1423  out:
1424         cfg80211_unlock_rdev(rdev);
1425         dev_put(dev);
1426  unlock_rtnl:
1427         rtnl_unlock();
1428
1429         return err;
1430 }
1431
1432 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1433 {
1434         struct cfg80211_registered_device *rdev;
1435         int err;
1436         struct net_device *dev;
1437         u8 *mac_addr = NULL;
1438         struct key_parse key;
1439
1440         err = nl80211_parse_key(info, &key);
1441         if (err)
1442                 return err;
1443
1444         if (info->attrs[NL80211_ATTR_MAC])
1445                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1446
1447         rtnl_lock();
1448
1449         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1450         if (err)
1451                 goto unlock_rtnl;
1452
1453         if (!rdev->ops->del_key) {
1454                 err = -EOPNOTSUPP;
1455                 goto out;
1456         }
1457
1458         wdev_lock(dev->ieee80211_ptr);
1459         err = nl80211_key_allowed(dev->ieee80211_ptr);
1460         if (!err)
1461                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1462
1463 #ifdef CONFIG_CFG80211_WEXT
1464         if (!err) {
1465                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1466                         dev->ieee80211_ptr->wext.default_key = -1;
1467                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1468                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1469         }
1470 #endif
1471         wdev_unlock(dev->ieee80211_ptr);
1472
1473  out:
1474         cfg80211_unlock_rdev(rdev);
1475         dev_put(dev);
1476
1477  unlock_rtnl:
1478         rtnl_unlock();
1479
1480         return err;
1481 }
1482
1483 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1484 {
1485         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1486                     struct beacon_parameters *info);
1487         struct cfg80211_registered_device *rdev;
1488         int err;
1489         struct net_device *dev;
1490         struct beacon_parameters params;
1491         int haveinfo = 0;
1492
1493         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1494                 return -EINVAL;
1495
1496         rtnl_lock();
1497
1498         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1499         if (err)
1500                 goto unlock_rtnl;
1501
1502         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1503                 err = -EOPNOTSUPP;
1504                 goto out;
1505         }
1506
1507         switch (info->genlhdr->cmd) {
1508         case NL80211_CMD_NEW_BEACON:
1509                 /* these are required for NEW_BEACON */
1510                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1511                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1512                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1513                         err = -EINVAL;
1514                         goto out;
1515                 }
1516
1517                 call = rdev->ops->add_beacon;
1518                 break;
1519         case NL80211_CMD_SET_BEACON:
1520                 call = rdev->ops->set_beacon;
1521                 break;
1522         default:
1523                 WARN_ON(1);
1524                 err = -EOPNOTSUPP;
1525                 goto out;
1526         }
1527
1528         if (!call) {
1529                 err = -EOPNOTSUPP;
1530                 goto out;
1531         }
1532
1533         memset(&params, 0, sizeof(params));
1534
1535         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1536                 params.interval =
1537                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1538                 haveinfo = 1;
1539         }
1540
1541         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1542                 params.dtim_period =
1543                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1544                 haveinfo = 1;
1545         }
1546
1547         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1548                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1549                 params.head_len =
1550                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1551                 haveinfo = 1;
1552         }
1553
1554         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1555                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1556                 params.tail_len =
1557                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1558                 haveinfo = 1;
1559         }
1560
1561         if (!haveinfo) {
1562                 err = -EINVAL;
1563                 goto out;
1564         }
1565
1566         err = call(&rdev->wiphy, dev, &params);
1567
1568  out:
1569         cfg80211_unlock_rdev(rdev);
1570         dev_put(dev);
1571  unlock_rtnl:
1572         rtnl_unlock();
1573
1574         return err;
1575 }
1576
1577 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1578 {
1579         struct cfg80211_registered_device *rdev;
1580         int err;
1581         struct net_device *dev;
1582
1583         rtnl_lock();
1584
1585         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1586         if (err)
1587                 goto unlock_rtnl;
1588
1589         if (!rdev->ops->del_beacon) {
1590                 err = -EOPNOTSUPP;
1591                 goto out;
1592         }
1593
1594         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1595                 err = -EOPNOTSUPP;
1596                 goto out;
1597         }
1598         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1599
1600  out:
1601         cfg80211_unlock_rdev(rdev);
1602         dev_put(dev);
1603  unlock_rtnl:
1604         rtnl_unlock();
1605
1606         return err;
1607 }
1608
1609 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1610         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1611         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1612         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1613         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1614 };
1615
1616 static int parse_station_flags(struct genl_info *info,
1617                                struct station_parameters *params)
1618 {
1619         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1620         struct nlattr *nla;
1621         int flag;
1622
1623         /*
1624          * Try parsing the new attribute first so userspace
1625          * can specify both for older kernels.
1626          */
1627         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1628         if (nla) {
1629                 struct nl80211_sta_flag_update *sta_flags;
1630
1631                 sta_flags = nla_data(nla);
1632                 params->sta_flags_mask = sta_flags->mask;
1633                 params->sta_flags_set = sta_flags->set;
1634                 if ((params->sta_flags_mask |
1635                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1636                         return -EINVAL;
1637                 return 0;
1638         }
1639
1640         /* if present, parse the old attribute */
1641
1642         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1643         if (!nla)
1644                 return 0;
1645
1646         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1647                              nla, sta_flags_policy))
1648                 return -EINVAL;
1649
1650         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1651         params->sta_flags_mask &= ~1;
1652
1653         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1654                 if (flags[flag])
1655                         params->sta_flags_set |= (1<<flag);
1656
1657         return 0;
1658 }
1659
1660 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1661                                 int flags, struct net_device *dev,
1662                                 const u8 *mac_addr, struct station_info *sinfo)
1663 {
1664         void *hdr;
1665         struct nlattr *sinfoattr, *txrate;
1666         u16 bitrate;
1667
1668         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1669         if (!hdr)
1670                 return -1;
1671
1672         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1673         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1674
1675         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1676
1677         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1678         if (!sinfoattr)
1679                 goto nla_put_failure;
1680         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1681                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1682                             sinfo->inactive_time);
1683         if (sinfo->filled & STATION_INFO_RX_BYTES)
1684                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1685                             sinfo->rx_bytes);
1686         if (sinfo->filled & STATION_INFO_TX_BYTES)
1687                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1688                             sinfo->tx_bytes);
1689         if (sinfo->filled & STATION_INFO_LLID)
1690                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1691                             sinfo->llid);
1692         if (sinfo->filled & STATION_INFO_PLID)
1693                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1694                             sinfo->plid);
1695         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1696                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1697                             sinfo->plink_state);
1698         if (sinfo->filled & STATION_INFO_SIGNAL)
1699                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1700                            sinfo->signal);
1701         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1702                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1703                 if (!txrate)
1704                         goto nla_put_failure;
1705
1706                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1707                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1708                 if (bitrate > 0)
1709                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1710
1711                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1712                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1713                                     sinfo->txrate.mcs);
1714                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1715                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1716                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1717                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1718
1719                 nla_nest_end(msg, txrate);
1720         }
1721         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1722                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1723                             sinfo->rx_packets);
1724         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1725                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1726                             sinfo->tx_packets);
1727         nla_nest_end(msg, sinfoattr);
1728
1729         return genlmsg_end(msg, hdr);
1730
1731  nla_put_failure:
1732         genlmsg_cancel(msg, hdr);
1733         return -EMSGSIZE;
1734 }
1735
1736 static int nl80211_dump_station(struct sk_buff *skb,
1737                                 struct netlink_callback *cb)
1738 {
1739         struct station_info sinfo;
1740         struct cfg80211_registered_device *dev;
1741         struct net_device *netdev;
1742         u8 mac_addr[ETH_ALEN];
1743         int ifidx = cb->args[0];
1744         int sta_idx = cb->args[1];
1745         int err;
1746
1747         if (!ifidx)
1748                 ifidx = nl80211_get_ifidx(cb);
1749         if (ifidx < 0)
1750                 return ifidx;
1751
1752         rtnl_lock();
1753
1754         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1755         if (!netdev) {
1756                 err = -ENODEV;
1757                 goto out_rtnl;
1758         }
1759
1760         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1761         if (IS_ERR(dev)) {
1762                 err = PTR_ERR(dev);
1763                 goto out_rtnl;
1764         }
1765
1766         if (!dev->ops->dump_station) {
1767                 err = -EOPNOTSUPP;
1768                 goto out_err;
1769         }
1770
1771         while (1) {
1772                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1773                                              mac_addr, &sinfo);
1774                 if (err == -ENOENT)
1775                         break;
1776                 if (err)
1777                         goto out_err;
1778
1779                 if (nl80211_send_station(skb,
1780                                 NETLINK_CB(cb->skb).pid,
1781                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1782                                 netdev, mac_addr,
1783                                 &sinfo) < 0)
1784                         goto out;
1785
1786                 sta_idx++;
1787         }
1788
1789
1790  out:
1791         cb->args[1] = sta_idx;
1792         err = skb->len;
1793  out_err:
1794         cfg80211_unlock_rdev(dev);
1795  out_rtnl:
1796         rtnl_unlock();
1797
1798         return err;
1799 }
1800
1801 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1802 {
1803         struct cfg80211_registered_device *rdev;
1804         int err;
1805         struct net_device *dev;
1806         struct station_info sinfo;
1807         struct sk_buff *msg;
1808         u8 *mac_addr = NULL;
1809
1810         memset(&sinfo, 0, sizeof(sinfo));
1811
1812         if (!info->attrs[NL80211_ATTR_MAC])
1813                 return -EINVAL;
1814
1815         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1816
1817         rtnl_lock();
1818
1819         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1820         if (err)
1821                 goto out_rtnl;
1822
1823         if (!rdev->ops->get_station) {
1824                 err = -EOPNOTSUPP;
1825                 goto out;
1826         }
1827
1828         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1829         if (err)
1830                 goto out;
1831
1832         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1833         if (!msg)
1834                 goto out;
1835
1836         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1837                                  dev, mac_addr, &sinfo) < 0)
1838                 goto out_free;
1839
1840         err = genlmsg_reply(msg, info);
1841         goto out;
1842
1843  out_free:
1844         nlmsg_free(msg);
1845  out:
1846         cfg80211_unlock_rdev(rdev);
1847         dev_put(dev);
1848  out_rtnl:
1849         rtnl_unlock();
1850
1851         return err;
1852 }
1853
1854 /*
1855  * Get vlan interface making sure it is running and on the right wiphy.
1856  */
1857 static int get_vlan(struct genl_info *info,
1858                     struct cfg80211_registered_device *rdev,
1859                     struct net_device **vlan)
1860 {
1861         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1862         *vlan = NULL;
1863
1864         if (vlanattr) {
1865                 *vlan = dev_get_by_index(genl_info_net(info),
1866                                          nla_get_u32(vlanattr));
1867                 if (!*vlan)
1868                         return -ENODEV;
1869                 if (!(*vlan)->ieee80211_ptr)
1870                         return -EINVAL;
1871                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1872                         return -EINVAL;
1873                 if (!netif_running(*vlan))
1874                         return -ENETDOWN;
1875         }
1876         return 0;
1877 }
1878
1879 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1880 {
1881         struct cfg80211_registered_device *rdev;
1882         int err;
1883         struct net_device *dev;
1884         struct station_parameters params;
1885         u8 *mac_addr = NULL;
1886
1887         memset(&params, 0, sizeof(params));
1888
1889         params.listen_interval = -1;
1890
1891         if (info->attrs[NL80211_ATTR_STA_AID])
1892                 return -EINVAL;
1893
1894         if (!info->attrs[NL80211_ATTR_MAC])
1895                 return -EINVAL;
1896
1897         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1898
1899         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1900                 params.supported_rates =
1901                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1902                 params.supported_rates_len =
1903                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1904         }
1905
1906         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1907                 params.listen_interval =
1908                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1909
1910         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1911                 params.ht_capa =
1912                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1913
1914         if (parse_station_flags(info, &params))
1915                 return -EINVAL;
1916
1917         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1918                 params.plink_action =
1919                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1920
1921         rtnl_lock();
1922
1923         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1924         if (err)
1925                 goto out_rtnl;
1926
1927         err = get_vlan(info, rdev, &params.vlan);
1928         if (err)
1929                 goto out;
1930
1931         /* validate settings */
1932         err = 0;
1933
1934         switch (dev->ieee80211_ptr->iftype) {
1935         case NL80211_IFTYPE_AP:
1936         case NL80211_IFTYPE_AP_VLAN:
1937                 /* disallow mesh-specific things */
1938                 if (params.plink_action)
1939                         err = -EINVAL;
1940                 break;
1941         case NL80211_IFTYPE_STATION:
1942                 /* disallow everything but AUTHORIZED flag */
1943                 if (params.plink_action)
1944                         err = -EINVAL;
1945                 if (params.vlan)
1946                         err = -EINVAL;
1947                 if (params.supported_rates)
1948                         err = -EINVAL;
1949                 if (params.ht_capa)
1950                         err = -EINVAL;
1951                 if (params.listen_interval >= 0)
1952                         err = -EINVAL;
1953                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1954                         err = -EINVAL;
1955                 break;
1956         case NL80211_IFTYPE_MESH_POINT:
1957                 /* disallow things mesh doesn't support */
1958                 if (params.vlan)
1959                         err = -EINVAL;
1960                 if (params.ht_capa)
1961                         err = -EINVAL;
1962                 if (params.listen_interval >= 0)
1963                         err = -EINVAL;
1964                 if (params.supported_rates)
1965                         err = -EINVAL;
1966                 if (params.sta_flags_mask)
1967                         err = -EINVAL;
1968                 break;
1969         default:
1970                 err = -EINVAL;
1971         }
1972
1973         if (err)
1974                 goto out;
1975
1976         if (!rdev->ops->change_station) {
1977                 err = -EOPNOTSUPP;
1978                 goto out;
1979         }
1980
1981         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1982
1983  out:
1984         if (params.vlan)
1985                 dev_put(params.vlan);
1986         cfg80211_unlock_rdev(rdev);
1987         dev_put(dev);
1988  out_rtnl:
1989         rtnl_unlock();
1990
1991         return err;
1992 }
1993
1994 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1995 {
1996         struct cfg80211_registered_device *rdev;
1997         int err;
1998         struct net_device *dev;
1999         struct station_parameters params;
2000         u8 *mac_addr = NULL;
2001
2002         memset(&params, 0, sizeof(params));
2003
2004         if (!info->attrs[NL80211_ATTR_MAC])
2005                 return -EINVAL;
2006
2007         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2008                 return -EINVAL;
2009
2010         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2011                 return -EINVAL;
2012
2013         if (!info->attrs[NL80211_ATTR_STA_AID])
2014                 return -EINVAL;
2015
2016         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2017         params.supported_rates =
2018                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2019         params.supported_rates_len =
2020                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2021         params.listen_interval =
2022                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2023
2024         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2025         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2026                 return -EINVAL;
2027
2028         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2029                 params.ht_capa =
2030                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2031
2032         if (parse_station_flags(info, &params))
2033                 return -EINVAL;
2034
2035         rtnl_lock();
2036
2037         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2038         if (err)
2039                 goto out_rtnl;
2040
2041         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2042             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2043                 err = -EINVAL;
2044                 goto out;
2045         }
2046
2047         err = get_vlan(info, rdev, &params.vlan);
2048         if (err)
2049                 goto out;
2050
2051         /* validate settings */
2052         err = 0;
2053
2054         if (!rdev->ops->add_station) {
2055                 err = -EOPNOTSUPP;
2056                 goto out;
2057         }
2058
2059         if (!netif_running(dev)) {
2060                 err = -ENETDOWN;
2061                 goto out;
2062         }
2063
2064         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2065
2066  out:
2067         if (params.vlan)
2068                 dev_put(params.vlan);
2069         cfg80211_unlock_rdev(rdev);
2070         dev_put(dev);
2071  out_rtnl:
2072         rtnl_unlock();
2073
2074         return err;
2075 }
2076
2077 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2078 {
2079         struct cfg80211_registered_device *rdev;
2080         int err;
2081         struct net_device *dev;
2082         u8 *mac_addr = NULL;
2083
2084         if (info->attrs[NL80211_ATTR_MAC])
2085                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2086
2087         rtnl_lock();
2088
2089         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2090         if (err)
2091                 goto out_rtnl;
2092
2093         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2094             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2095                 err = -EINVAL;
2096                 goto out;
2097         }
2098
2099         if (!rdev->ops->del_station) {
2100                 err = -EOPNOTSUPP;
2101                 goto out;
2102         }
2103
2104         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2105
2106  out:
2107         cfg80211_unlock_rdev(rdev);
2108         dev_put(dev);
2109  out_rtnl:
2110         rtnl_unlock();
2111
2112         return err;
2113 }
2114
2115 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2116                                 int flags, struct net_device *dev,
2117                                 u8 *dst, u8 *next_hop,
2118                                 struct mpath_info *pinfo)
2119 {
2120         void *hdr;
2121         struct nlattr *pinfoattr;
2122
2123         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2124         if (!hdr)
2125                 return -1;
2126
2127         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2128         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2129         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2130
2131         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2132
2133         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2134         if (!pinfoattr)
2135                 goto nla_put_failure;
2136         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2137                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2138                             pinfo->frame_qlen);
2139         if (pinfo->filled & MPATH_INFO_SN)
2140                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2141                             pinfo->sn);
2142         if (pinfo->filled & MPATH_INFO_METRIC)
2143                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2144                             pinfo->metric);
2145         if (pinfo->filled & MPATH_INFO_EXPTIME)
2146                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2147                             pinfo->exptime);
2148         if (pinfo->filled & MPATH_INFO_FLAGS)
2149                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2150                             pinfo->flags);
2151         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2152                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2153                             pinfo->discovery_timeout);
2154         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2155                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2156                             pinfo->discovery_retries);
2157
2158         nla_nest_end(msg, pinfoattr);
2159
2160         return genlmsg_end(msg, hdr);
2161
2162  nla_put_failure:
2163         genlmsg_cancel(msg, hdr);
2164         return -EMSGSIZE;
2165 }
2166
2167 static int nl80211_dump_mpath(struct sk_buff *skb,
2168                               struct netlink_callback *cb)
2169 {
2170         struct mpath_info pinfo;
2171         struct cfg80211_registered_device *dev;
2172         struct net_device *netdev;
2173         u8 dst[ETH_ALEN];
2174         u8 next_hop[ETH_ALEN];
2175         int ifidx = cb->args[0];
2176         int path_idx = cb->args[1];
2177         int err;
2178
2179         if (!ifidx)
2180                 ifidx = nl80211_get_ifidx(cb);
2181         if (ifidx < 0)
2182                 return ifidx;
2183
2184         rtnl_lock();
2185
2186         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2187         if (!netdev) {
2188                 err = -ENODEV;
2189                 goto out_rtnl;
2190         }
2191
2192         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2193         if (IS_ERR(dev)) {
2194                 err = PTR_ERR(dev);
2195                 goto out_rtnl;
2196         }
2197
2198         if (!dev->ops->dump_mpath) {
2199                 err = -EOPNOTSUPP;
2200                 goto out_err;
2201         }
2202
2203         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2204                 err = -EOPNOTSUPP;
2205                 goto out_err;
2206         }
2207
2208         while (1) {
2209                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2210                                            dst, next_hop, &pinfo);
2211                 if (err == -ENOENT)
2212                         break;
2213                 if (err)
2214                         goto out_err;
2215
2216                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2217                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2218                                        netdev, dst, next_hop,
2219                                        &pinfo) < 0)
2220                         goto out;
2221
2222                 path_idx++;
2223         }
2224
2225
2226  out:
2227         cb->args[1] = path_idx;
2228         err = skb->len;
2229  out_err:
2230         cfg80211_unlock_rdev(dev);
2231  out_rtnl:
2232         rtnl_unlock();
2233
2234         return err;
2235 }
2236
2237 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2238 {
2239         struct cfg80211_registered_device *rdev;
2240         int err;
2241         struct net_device *dev;
2242         struct mpath_info pinfo;
2243         struct sk_buff *msg;
2244         u8 *dst = NULL;
2245         u8 next_hop[ETH_ALEN];
2246
2247         memset(&pinfo, 0, sizeof(pinfo));
2248
2249         if (!info->attrs[NL80211_ATTR_MAC])
2250                 return -EINVAL;
2251
2252         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2253
2254         rtnl_lock();
2255
2256         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2257         if (err)
2258                 goto out_rtnl;
2259
2260         if (!rdev->ops->get_mpath) {
2261                 err = -EOPNOTSUPP;
2262                 goto out;
2263         }
2264
2265         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2266                 err = -EOPNOTSUPP;
2267                 goto out;
2268         }
2269
2270         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2271         if (err)
2272                 goto out;
2273
2274         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2275         if (!msg)
2276                 goto out;
2277
2278         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2279                                  dev, dst, next_hop, &pinfo) < 0)
2280                 goto out_free;
2281
2282         err = genlmsg_reply(msg, info);
2283         goto out;
2284
2285  out_free:
2286         nlmsg_free(msg);
2287  out:
2288         cfg80211_unlock_rdev(rdev);
2289         dev_put(dev);
2290  out_rtnl:
2291         rtnl_unlock();
2292
2293         return err;
2294 }
2295
2296 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2297 {
2298         struct cfg80211_registered_device *rdev;
2299         int err;
2300         struct net_device *dev;
2301         u8 *dst = NULL;
2302         u8 *next_hop = NULL;
2303
2304         if (!info->attrs[NL80211_ATTR_MAC])
2305                 return -EINVAL;
2306
2307         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2308                 return -EINVAL;
2309
2310         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2311         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2312
2313         rtnl_lock();
2314
2315         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2316         if (err)
2317                 goto out_rtnl;
2318
2319         if (!rdev->ops->change_mpath) {
2320                 err = -EOPNOTSUPP;
2321                 goto out;
2322         }
2323
2324         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2325                 err = -EOPNOTSUPP;
2326                 goto out;
2327         }
2328
2329         if (!netif_running(dev)) {
2330                 err = -ENETDOWN;
2331                 goto out;
2332         }
2333
2334         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2335
2336  out:
2337         cfg80211_unlock_rdev(rdev);
2338         dev_put(dev);
2339  out_rtnl:
2340         rtnl_unlock();
2341
2342         return err;
2343 }
2344 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2345 {
2346         struct cfg80211_registered_device *rdev;
2347         int err;
2348         struct net_device *dev;
2349         u8 *dst = NULL;
2350         u8 *next_hop = NULL;
2351
2352         if (!info->attrs[NL80211_ATTR_MAC])
2353                 return -EINVAL;
2354
2355         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2356                 return -EINVAL;
2357
2358         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2359         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2360
2361         rtnl_lock();
2362
2363         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2364         if (err)
2365                 goto out_rtnl;
2366
2367         if (!rdev->ops->add_mpath) {
2368                 err = -EOPNOTSUPP;
2369                 goto out;
2370         }
2371
2372         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2373                 err = -EOPNOTSUPP;
2374                 goto out;
2375         }
2376
2377         if (!netif_running(dev)) {
2378                 err = -ENETDOWN;
2379                 goto out;
2380         }
2381
2382         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2383
2384  out:
2385         cfg80211_unlock_rdev(rdev);
2386         dev_put(dev);
2387  out_rtnl:
2388         rtnl_unlock();
2389
2390         return err;
2391 }
2392
2393 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2394 {
2395         struct cfg80211_registered_device *rdev;
2396         int err;
2397         struct net_device *dev;
2398         u8 *dst = NULL;
2399
2400         if (info->attrs[NL80211_ATTR_MAC])
2401                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2402
2403         rtnl_lock();
2404
2405         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2406         if (err)
2407                 goto out_rtnl;
2408
2409         if (!rdev->ops->del_mpath) {
2410                 err = -EOPNOTSUPP;
2411                 goto out;
2412         }
2413
2414         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2415
2416  out:
2417         cfg80211_unlock_rdev(rdev);
2418         dev_put(dev);
2419  out_rtnl:
2420         rtnl_unlock();
2421
2422         return err;
2423 }
2424
2425 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2426 {
2427         struct cfg80211_registered_device *rdev;
2428         int err;
2429         struct net_device *dev;
2430         struct bss_parameters params;
2431
2432         memset(&params, 0, sizeof(params));
2433         /* default to not changing parameters */
2434         params.use_cts_prot = -1;
2435         params.use_short_preamble = -1;
2436         params.use_short_slot_time = -1;
2437
2438         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2439                 params.use_cts_prot =
2440                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2441         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2442                 params.use_short_preamble =
2443                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2444         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2445                 params.use_short_slot_time =
2446                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2447         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2448                 params.basic_rates =
2449                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2450                 params.basic_rates_len =
2451                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2452         }
2453
2454         rtnl_lock();
2455
2456         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2457         if (err)
2458                 goto out_rtnl;
2459
2460         if (!rdev->ops->change_bss) {
2461                 err = -EOPNOTSUPP;
2462                 goto out;
2463         }
2464
2465         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2466                 err = -EOPNOTSUPP;
2467                 goto out;
2468         }
2469
2470         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2471
2472  out:
2473         cfg80211_unlock_rdev(rdev);
2474         dev_put(dev);
2475  out_rtnl:
2476         rtnl_unlock();
2477
2478         return err;
2479 }
2480
2481 static const struct nla_policy
2482         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2483         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2484         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2485         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2486         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2487         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2488         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2489 };
2490
2491 static int parse_reg_rule(struct nlattr *tb[],
2492         struct ieee80211_reg_rule *reg_rule)
2493 {
2494         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2495         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2496
2497         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2498                 return -EINVAL;
2499         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2500                 return -EINVAL;
2501         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2502                 return -EINVAL;
2503         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2504                 return -EINVAL;
2505         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2506                 return -EINVAL;
2507
2508         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2509
2510         freq_range->start_freq_khz =
2511                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2512         freq_range->end_freq_khz =
2513                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2514         freq_range->max_bandwidth_khz =
2515                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2516
2517         power_rule->max_eirp =
2518                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2519
2520         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2521                 power_rule->max_antenna_gain =
2522                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2523
2524         return 0;
2525 }
2526
2527 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2528 {
2529         int r;
2530         char *data = NULL;
2531
2532         /*
2533          * You should only get this when cfg80211 hasn't yet initialized
2534          * completely when built-in to the kernel right between the time
2535          * window between nl80211_init() and regulatory_init(), if that is
2536          * even possible.
2537          */
2538         mutex_lock(&cfg80211_mutex);
2539         if (unlikely(!cfg80211_regdomain)) {
2540                 mutex_unlock(&cfg80211_mutex);
2541                 return -EINPROGRESS;
2542         }
2543         mutex_unlock(&cfg80211_mutex);
2544
2545         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2546                 return -EINVAL;
2547
2548         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2549
2550         r = regulatory_hint_user(data);
2551
2552         return r;
2553 }
2554
2555 static int nl80211_get_mesh_params(struct sk_buff *skb,
2556         struct genl_info *info)
2557 {
2558         struct cfg80211_registered_device *rdev;
2559         struct mesh_config cur_params;
2560         int err;
2561         struct net_device *dev;
2562         void *hdr;
2563         struct nlattr *pinfoattr;
2564         struct sk_buff *msg;
2565
2566         rtnl_lock();
2567
2568         /* Look up our device */
2569         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2570         if (err)
2571                 goto out_rtnl;
2572
2573         if (!rdev->ops->get_mesh_params) {
2574                 err = -EOPNOTSUPP;
2575                 goto out;
2576         }
2577
2578         /* Get the mesh params */
2579         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2580         if (err)
2581                 goto out;
2582
2583         /* Draw up a netlink message to send back */
2584         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2585         if (!msg) {
2586                 err = -ENOBUFS;
2587                 goto out;
2588         }
2589         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2590                              NL80211_CMD_GET_MESH_PARAMS);
2591         if (!hdr)
2592                 goto nla_put_failure;
2593         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2594         if (!pinfoattr)
2595                 goto nla_put_failure;
2596         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2597         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2598                         cur_params.dot11MeshRetryTimeout);
2599         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2600                         cur_params.dot11MeshConfirmTimeout);
2601         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2602                         cur_params.dot11MeshHoldingTimeout);
2603         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2604                         cur_params.dot11MeshMaxPeerLinks);
2605         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2606                         cur_params.dot11MeshMaxRetries);
2607         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2608                         cur_params.dot11MeshTTL);
2609         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2610                         cur_params.auto_open_plinks);
2611         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2612                         cur_params.dot11MeshHWMPmaxPREQretries);
2613         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2614                         cur_params.path_refresh_time);
2615         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2616                         cur_params.min_discovery_timeout);
2617         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2618                         cur_params.dot11MeshHWMPactivePathTimeout);
2619         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2620                         cur_params.dot11MeshHWMPpreqMinInterval);
2621         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2622                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2623         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2624                         cur_params.dot11MeshHWMPRootMode);
2625         nla_nest_end(msg, pinfoattr);
2626         genlmsg_end(msg, hdr);
2627         err = genlmsg_reply(msg, info);
2628         goto out;
2629
2630  nla_put_failure:
2631         genlmsg_cancel(msg, hdr);
2632         err = -EMSGSIZE;
2633  out:
2634         /* Cleanup */
2635         cfg80211_unlock_rdev(rdev);
2636         dev_put(dev);
2637  out_rtnl:
2638         rtnl_unlock();
2639
2640         return err;
2641 }
2642
2643 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2644 do {\
2645         if (table[attr_num]) {\
2646                 cfg.param = nla_fn(table[attr_num]); \
2647                 mask |= (1 << (attr_num - 1)); \
2648         } \
2649 } while (0);\
2650
2651 static struct nla_policy
2652 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2653         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2654         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2655         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2656         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2657         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2658         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2659         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2660
2661         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2662         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2663         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2664         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2665         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2666         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2667 };
2668
2669 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2670 {
2671         int err;
2672         u32 mask;
2673         struct cfg80211_registered_device *rdev;
2674         struct net_device *dev;
2675         struct mesh_config cfg;
2676         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2677         struct nlattr *parent_attr;
2678
2679         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2680         if (!parent_attr)
2681                 return -EINVAL;
2682         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2683                         parent_attr, nl80211_meshconf_params_policy))
2684                 return -EINVAL;
2685
2686         rtnl_lock();
2687
2688         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2689         if (err)
2690                 goto out_rtnl;
2691
2692         if (!rdev->ops->set_mesh_params) {
2693                 err = -EOPNOTSUPP;
2694                 goto out;
2695         }
2696
2697         /* This makes sure that there aren't more than 32 mesh config
2698          * parameters (otherwise our bitfield scheme would not work.) */
2699         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2700
2701         /* Fill in the params struct */
2702         mask = 0;
2703         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2704                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2705         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2706                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2707         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2708                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2710                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2711         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2712                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2713         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2714                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2716                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2717         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2718                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2719                         nla_get_u8);
2720         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2721                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2722         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2723                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2724                         nla_get_u16);
2725         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2726                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2727                         nla_get_u32);
2728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2729                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2730                         nla_get_u16);
2731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2732                         dot11MeshHWMPnetDiameterTraversalTime,
2733                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2734                         nla_get_u16);
2735         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2736                         dot11MeshHWMPRootMode, mask,
2737                         NL80211_MESHCONF_HWMP_ROOTMODE,
2738                         nla_get_u8);
2739
2740         /* Apply changes */
2741         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2742
2743  out:
2744         /* cleanup */
2745         cfg80211_unlock_rdev(rdev);
2746         dev_put(dev);
2747  out_rtnl:
2748         rtnl_unlock();
2749
2750         return err;
2751 }
2752
2753 #undef FILL_IN_MESH_PARAM_IF_SET
2754
2755 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2756 {
2757         struct sk_buff *msg;
2758         void *hdr = NULL;
2759         struct nlattr *nl_reg_rules;
2760         unsigned int i;
2761         int err = -EINVAL;
2762
2763         mutex_lock(&cfg80211_mutex);
2764
2765         if (!cfg80211_regdomain)
2766                 goto out;
2767
2768         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2769         if (!msg) {
2770                 err = -ENOBUFS;
2771                 goto out;
2772         }
2773
2774         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2775                              NL80211_CMD_GET_REG);
2776         if (!hdr)
2777                 goto nla_put_failure;
2778
2779         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2780                 cfg80211_regdomain->alpha2);
2781
2782         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2783         if (!nl_reg_rules)
2784                 goto nla_put_failure;
2785
2786         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2787                 struct nlattr *nl_reg_rule;
2788                 const struct ieee80211_reg_rule *reg_rule;
2789                 const struct ieee80211_freq_range *freq_range;
2790                 const struct ieee80211_power_rule *power_rule;
2791
2792                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2793                 freq_range = &reg_rule->freq_range;
2794                 power_rule = &reg_rule->power_rule;
2795
2796                 nl_reg_rule = nla_nest_start(msg, i);
2797                 if (!nl_reg_rule)
2798                         goto nla_put_failure;
2799
2800                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2801                         reg_rule->flags);
2802                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2803                         freq_range->start_freq_khz);
2804                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2805                         freq_range->end_freq_khz);
2806                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2807                         freq_range->max_bandwidth_khz);
2808                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2809                         power_rule->max_antenna_gain);
2810                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2811                         power_rule->max_eirp);
2812
2813                 nla_nest_end(msg, nl_reg_rule);
2814         }
2815
2816         nla_nest_end(msg, nl_reg_rules);
2817
2818         genlmsg_end(msg, hdr);
2819         err = genlmsg_reply(msg, info);
2820         goto out;
2821
2822 nla_put_failure:
2823         genlmsg_cancel(msg, hdr);
2824         err = -EMSGSIZE;
2825 out:
2826         mutex_unlock(&cfg80211_mutex);
2827         return err;
2828 }
2829
2830 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2831 {
2832         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2833         struct nlattr *nl_reg_rule;
2834         char *alpha2 = NULL;
2835         int rem_reg_rules = 0, r = 0;
2836         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2837         struct ieee80211_regdomain *rd = NULL;
2838
2839         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2840                 return -EINVAL;
2841
2842         if (!info->attrs[NL80211_ATTR_REG_RULES])
2843                 return -EINVAL;
2844
2845         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2846
2847         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2848                         rem_reg_rules) {
2849                 num_rules++;
2850                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2851                         return -EINVAL;
2852         }
2853
2854         mutex_lock(&cfg80211_mutex);
2855
2856         if (!reg_is_valid_request(alpha2)) {
2857                 r = -EINVAL;
2858                 goto bad_reg;
2859         }
2860
2861         size_of_regd = sizeof(struct ieee80211_regdomain) +
2862                 (num_rules * sizeof(struct ieee80211_reg_rule));
2863
2864         rd = kzalloc(size_of_regd, GFP_KERNEL);
2865         if (!rd) {
2866                 r = -ENOMEM;
2867                 goto bad_reg;
2868         }
2869
2870         rd->n_reg_rules = num_rules;
2871         rd->alpha2[0] = alpha2[0];
2872         rd->alpha2[1] = alpha2[1];
2873
2874         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2875                         rem_reg_rules) {
2876                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2877                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2878                         reg_rule_policy);
2879                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2880                 if (r)
2881                         goto bad_reg;
2882
2883                 rule_idx++;
2884
2885                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2886                         r = -EINVAL;
2887                         goto bad_reg;
2888                 }
2889         }
2890
2891         BUG_ON(rule_idx != num_rules);
2892
2893         r = set_regdom(rd);
2894
2895         mutex_unlock(&cfg80211_mutex);
2896
2897         return r;
2898
2899  bad_reg:
2900         mutex_unlock(&cfg80211_mutex);
2901         kfree(rd);
2902         return r;
2903 }
2904
2905 static int validate_scan_freqs(struct nlattr *freqs)
2906 {
2907         struct nlattr *attr1, *attr2;
2908         int n_channels = 0, tmp1, tmp2;
2909
2910         nla_for_each_nested(attr1, freqs, tmp1) {
2911                 n_channels++;
2912                 /*
2913                  * Some hardware has a limited channel list for
2914                  * scanning, and it is pretty much nonsensical
2915                  * to scan for a channel twice, so disallow that
2916                  * and don't require drivers to check that the
2917                  * channel list they get isn't longer than what
2918                  * they can scan, as long as they can scan all
2919                  * the channels they registered at once.
2920                  */
2921                 nla_for_each_nested(attr2, freqs, tmp2)
2922                         if (attr1 != attr2 &&
2923                             nla_get_u32(attr1) == nla_get_u32(attr2))
2924                                 return 0;
2925         }
2926
2927         return n_channels;
2928 }
2929
2930 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2931 {
2932         struct cfg80211_registered_device *rdev;
2933         struct net_device *dev;
2934         struct cfg80211_scan_request *request;
2935         struct cfg80211_ssid *ssid;
2936         struct ieee80211_channel *channel;
2937         struct nlattr *attr;
2938         struct wiphy *wiphy;
2939         int err, tmp, n_ssids = 0, n_channels, i;
2940         enum ieee80211_band band;
2941         size_t ie_len;
2942
2943         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2944                 return -EINVAL;
2945
2946         rtnl_lock();
2947
2948         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2949         if (err)
2950                 goto out_rtnl;
2951
2952         wiphy = &rdev->wiphy;
2953
2954         if (!rdev->ops->scan) {
2955                 err = -EOPNOTSUPP;
2956                 goto out;
2957         }
2958
2959         if (!netif_running(dev)) {
2960                 err = -ENETDOWN;
2961                 goto out;
2962         }
2963
2964         if (rdev->scan_req) {
2965                 err = -EBUSY;
2966                 goto out;
2967         }
2968
2969         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2970                 n_channels = validate_scan_freqs(
2971                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2972                 if (!n_channels) {
2973                         err = -EINVAL;
2974                         goto out;
2975                 }
2976         } else {
2977                 n_channels = 0;
2978
2979                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2980                         if (wiphy->bands[band])
2981                                 n_channels += wiphy->bands[band]->n_channels;
2982         }
2983
2984         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2985                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2986                         n_ssids++;
2987
2988         if (n_ssids > wiphy->max_scan_ssids) {
2989                 err = -EINVAL;
2990                 goto out;
2991         }
2992
2993         if (info->attrs[NL80211_ATTR_IE])
2994                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2995         else
2996                 ie_len = 0;
2997
2998         if (ie_len > wiphy->max_scan_ie_len) {
2999                 err = -EINVAL;
3000                 goto out;
3001         }
3002
3003         request = kzalloc(sizeof(*request)
3004                         + sizeof(*ssid) * n_ssids
3005                         + sizeof(channel) * n_channels
3006                         + ie_len, GFP_KERNEL);
3007         if (!request) {
3008                 err = -ENOMEM;
3009                 goto out;
3010         }
3011
3012         if (n_ssids)
3013                 request->ssids = (void *)&request->channels[n_channels];
3014         request->n_ssids = n_ssids;
3015         if (ie_len) {
3016                 if (request->ssids)
3017                         request->ie = (void *)(request->ssids + n_ssids);
3018                 else
3019                         request->ie = (void *)(request->channels + n_channels);
3020         }
3021
3022         i = 0;
3023         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3024                 /* user specified, bail out if channel not found */
3025                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3026                         struct ieee80211_channel *chan;
3027
3028                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3029
3030                         if (!chan) {
3031                                 err = -EINVAL;
3032                                 goto out_free;
3033                         }
3034
3035                         /* ignore disabled channels */
3036                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3037                                 continue;
3038
3039                         request->channels[i] = chan;
3040                         i++;
3041                 }
3042         } else {
3043                 /* all channels */
3044                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3045                         int j;
3046                         if (!wiphy->bands[band])
3047                                 continue;
3048                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3049                                 struct ieee80211_channel *chan;
3050
3051                                 chan = &wiphy->bands[band]->channels[j];
3052
3053                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3054                                         continue;
3055
3056                                 request->channels[i] = chan;
3057                                 i++;
3058                         }
3059                 }
3060         }
3061
3062         if (!i) {
3063                 err = -EINVAL;
3064                 goto out_free;
3065         }
3066
3067         request->n_channels = i;
3068
3069         i = 0;
3070         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3071                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3072                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3073                                 err = -EINVAL;
3074                                 goto out_free;
3075                         }
3076                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3077                         request->ssids[i].ssid_len = nla_len(attr);
3078                         i++;
3079                 }
3080         }
3081
3082         if (info->attrs[NL80211_ATTR_IE]) {
3083                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3084                 memcpy((void *)request->ie,
3085                        nla_data(info->attrs[NL80211_ATTR_IE]),
3086                        request->ie_len);
3087         }
3088
3089         request->dev = dev;
3090         request->wiphy = &rdev->wiphy;
3091
3092         rdev->scan_req = request;
3093         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3094
3095         if (!err) {
3096                 nl80211_send_scan_start(rdev, dev);
3097                 dev_hold(dev);
3098         }
3099
3100  out_free:
3101         if (err) {
3102                 rdev->scan_req = NULL;
3103                 kfree(request);
3104         }
3105  out:
3106         cfg80211_unlock_rdev(rdev);
3107         dev_put(dev);
3108  out_rtnl:
3109         rtnl_unlock();
3110
3111         return err;
3112 }
3113
3114 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3115                             struct cfg80211_registered_device *rdev,
3116                             struct wireless_dev *wdev,
3117                             struct cfg80211_internal_bss *intbss)
3118 {
3119         struct cfg80211_bss *res = &intbss->pub;
3120         void *hdr;
3121         struct nlattr *bss;
3122         int i;
3123
3124         ASSERT_WDEV_LOCK(wdev);
3125
3126         hdr = nl80211hdr_put(msg, pid, seq, flags,
3127                              NL80211_CMD_NEW_SCAN_RESULTS);
3128         if (!hdr)
3129                 return -1;
3130
3131         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, 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->beacon_ies && res->len_beacon_ies &&
3144             res->beacon_ies != res->information_elements)
3145                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3146                         res->len_beacon_ies, res->beacon_ies);
3147         if (res->tsf)
3148                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3149         if (res->beacon_interval)
3150                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3151         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3152         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3153         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3154                 jiffies_to_msecs(jiffies - intbss->ts));
3155
3156         switch (rdev->wiphy.signal_type) {
3157         case CFG80211_SIGNAL_TYPE_MBM:
3158                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3159                 break;
3160         case CFG80211_SIGNAL_TYPE_UNSPEC:
3161                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3162                 break;
3163         default:
3164                 break;
3165         }
3166
3167         switch (wdev->iftype) {
3168         case NL80211_IFTYPE_STATION:
3169                 if (intbss == wdev->current_bss)
3170                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3171                                     NL80211_BSS_STATUS_ASSOCIATED);
3172                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3173                         if (intbss != wdev->auth_bsses[i])
3174                                 continue;
3175                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3176                                     NL80211_BSS_STATUS_AUTHENTICATED);
3177                         break;
3178                 }
3179                 break;
3180         case NL80211_IFTYPE_ADHOC:
3181                 if (intbss == wdev->current_bss)
3182                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3183                                     NL80211_BSS_STATUS_IBSS_JOINED);
3184                 break;
3185         default:
3186                 break;
3187         }
3188
3189         nla_nest_end(msg, bss);
3190
3191         return genlmsg_end(msg, hdr);
3192
3193  nla_put_failure:
3194         genlmsg_cancel(msg, hdr);
3195         return -EMSGSIZE;
3196 }
3197
3198 static int nl80211_dump_scan(struct sk_buff *skb,
3199                              struct netlink_callback *cb)
3200 {
3201         struct cfg80211_registered_device *rdev;
3202         struct net_device *dev;
3203         struct cfg80211_internal_bss *scan;
3204         struct wireless_dev *wdev;
3205         int ifidx = cb->args[0];
3206         int start = cb->args[1], idx = 0;
3207         int err;
3208
3209         if (!ifidx)
3210                 ifidx = nl80211_get_ifidx(cb);
3211         if (ifidx < 0)
3212                 return ifidx;
3213         cb->args[0] = ifidx;
3214
3215         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3216         if (!dev)
3217                 return -ENODEV;
3218
3219         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3220         if (IS_ERR(rdev)) {
3221                 err = PTR_ERR(rdev);
3222                 goto out_put_netdev;
3223         }
3224
3225         wdev = dev->ieee80211_ptr;
3226
3227         wdev_lock(wdev);
3228         spin_lock_bh(&rdev->bss_lock);
3229         cfg80211_bss_expire(rdev);
3230
3231         list_for_each_entry(scan, &rdev->bss_list, list) {
3232                 if (++idx <= start)
3233                         continue;
3234                 if (nl80211_send_bss(skb,
3235                                 NETLINK_CB(cb->skb).pid,
3236                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3237                                 rdev, wdev, scan) < 0) {
3238                         idx--;
3239                         goto out;
3240                 }
3241         }
3242
3243  out:
3244         spin_unlock_bh(&rdev->bss_lock);
3245         wdev_unlock(wdev);
3246
3247         cb->args[1] = idx;
3248         err = skb->len;
3249         cfg80211_unlock_rdev(rdev);
3250  out_put_netdev:
3251         dev_put(dev);
3252
3253         return err;
3254 }
3255
3256 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3257                                 int flags, struct net_device *dev,
3258                                 struct survey_info *survey)
3259 {
3260         void *hdr;
3261         struct nlattr *infoattr;
3262
3263         /* Survey without a channel doesn't make sense */
3264         if (!survey->channel)
3265                 return -EINVAL;
3266
3267         hdr = nl80211hdr_put(msg, pid, seq, flags,
3268                              NL80211_CMD_NEW_SURVEY_RESULTS);
3269         if (!hdr)
3270                 return -ENOMEM;
3271
3272         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3273
3274         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3275         if (!infoattr)
3276                 goto nla_put_failure;
3277
3278         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3279                     survey->channel->center_freq);
3280         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3281                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3282                             survey->noise);
3283
3284         nla_nest_end(msg, infoattr);
3285
3286         return genlmsg_end(msg, hdr);
3287
3288  nla_put_failure:
3289         genlmsg_cancel(msg, hdr);
3290         return -EMSGSIZE;
3291 }
3292
3293 static int nl80211_dump_survey(struct sk_buff *skb,
3294                         struct netlink_callback *cb)
3295 {
3296         struct survey_info survey;
3297         struct cfg80211_registered_device *dev;
3298         struct net_device *netdev;
3299         int ifidx = cb->args[0];
3300         int survey_idx = cb->args[1];
3301         int res;
3302
3303         if (!ifidx)
3304                 ifidx = nl80211_get_ifidx(cb);
3305         if (ifidx < 0)
3306                 return ifidx;
3307         cb->args[0] = ifidx;
3308
3309         rtnl_lock();
3310
3311         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3312         if (!netdev) {
3313                 res = -ENODEV;
3314                 goto out_rtnl;
3315         }
3316
3317         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3318         if (IS_ERR(dev)) {
3319                 res = PTR_ERR(dev);
3320                 goto out_rtnl;
3321         }
3322
3323         if (!dev->ops->dump_survey) {
3324                 res = -EOPNOTSUPP;
3325                 goto out_err;
3326         }
3327
3328         while (1) {
3329                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3330                                             &survey);
3331                 if (res == -ENOENT)
3332                         break;
3333                 if (res)
3334                         goto out_err;
3335
3336                 if (nl80211_send_survey(skb,
3337                                 NETLINK_CB(cb->skb).pid,
3338                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3339                                 netdev,
3340                                 &survey) < 0)
3341                         goto out;
3342                 survey_idx++;
3343         }
3344
3345  out:
3346         cb->args[1] = survey_idx;
3347         res = skb->len;
3348  out_err:
3349         cfg80211_unlock_rdev(dev);
3350  out_rtnl:
3351         rtnl_unlock();
3352
3353         return res;
3354 }
3355
3356 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3357 {
3358         return auth_type <= NL80211_AUTHTYPE_MAX;
3359 }
3360
3361 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3362 {
3363         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3364                                   NL80211_WPA_VERSION_2));
3365 }
3366
3367 static bool nl80211_valid_akm_suite(u32 akm)
3368 {
3369         return akm == WLAN_AKM_SUITE_8021X ||
3370                 akm == WLAN_AKM_SUITE_PSK;
3371 }
3372
3373 static bool nl80211_valid_cipher_suite(u32 cipher)
3374 {
3375         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3376                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3377                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3378                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3379                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3380 }
3381
3382
3383 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3384 {
3385         struct cfg80211_registered_device *rdev;
3386         struct net_device *dev;
3387         struct ieee80211_channel *chan;
3388         const u8 *bssid, *ssid, *ie = NULL;
3389         int err, ssid_len, ie_len = 0;
3390         enum nl80211_auth_type auth_type;
3391         struct key_parse key;
3392
3393         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3394                 return -EINVAL;
3395
3396         if (!info->attrs[NL80211_ATTR_MAC])
3397                 return -EINVAL;
3398
3399         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3400                 return -EINVAL;
3401
3402         if (!info->attrs[NL80211_ATTR_SSID])
3403                 return -EINVAL;
3404
3405         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3406                 return -EINVAL;
3407
3408         err = nl80211_parse_key(info, &key);
3409         if (err)
3410                 return err;
3411
3412         if (key.idx >= 0) {
3413                 if (!key.p.key || !key.p.key_len)
3414                         return -EINVAL;
3415                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3416                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3417                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3418                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3419                         return -EINVAL;
3420                 if (key.idx > 4)
3421                         return -EINVAL;
3422         } else {
3423                 key.p.key_len = 0;
3424                 key.p.key = NULL;
3425         }
3426
3427         rtnl_lock();
3428
3429         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3430         if (err)
3431                 goto unlock_rtnl;
3432
3433         if (!rdev->ops->auth) {
3434                 err = -EOPNOTSUPP;
3435                 goto out;
3436         }
3437
3438         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3439                 err = -EOPNOTSUPP;
3440                 goto out;
3441         }
3442
3443         if (!netif_running(dev)) {
3444                 err = -ENETDOWN;
3445                 goto out;
3446         }
3447
3448         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3449         chan = ieee80211_get_channel(&rdev->wiphy,
3450                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3451         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3452                 err = -EINVAL;
3453                 goto out;
3454         }
3455
3456         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3457         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3458
3459         if (info->attrs[NL80211_ATTR_IE]) {
3460                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3461                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3462         }
3463
3464         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3465         if (!nl80211_valid_auth_type(auth_type)) {
3466                 err = -EINVAL;
3467                 goto out;
3468         }
3469
3470         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3471                                  ssid, ssid_len, ie, ie_len,
3472                                  key.p.key, key.p.key_len, key.idx);
3473
3474 out:
3475         cfg80211_unlock_rdev(rdev);
3476         dev_put(dev);
3477 unlock_rtnl:
3478         rtnl_unlock();
3479         return err;
3480 }
3481
3482 static int nl80211_crypto_settings(struct genl_info *info,
3483                                    struct cfg80211_crypto_settings *settings,
3484                                    int cipher_limit)
3485 {
3486         memset(settings, 0, sizeof(*settings));
3487
3488         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3489
3490         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3491                 void *data;
3492                 int len, i;
3493
3494                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3495                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3496                 settings->n_ciphers_pairwise = len / sizeof(u32);
3497
3498                 if (len % sizeof(u32))
3499                         return -EINVAL;
3500
3501                 if (settings->n_ciphers_pairwise > cipher_limit)
3502                         return -EINVAL;
3503
3504                 memcpy(settings->ciphers_pairwise, data, len);
3505
3506                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3507                         if (!nl80211_valid_cipher_suite(
3508                                         settings->ciphers_pairwise[i]))
3509                                 return -EINVAL;
3510         }
3511
3512         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3513                 settings->cipher_group =
3514                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3515                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3516                         return -EINVAL;
3517         }
3518
3519         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3520                 settings->wpa_versions =
3521                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3522                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3523                         return -EINVAL;
3524         }
3525
3526         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3527                 void *data;
3528                 int len, i;
3529
3530                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3531                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3532                 settings->n_akm_suites = len / sizeof(u32);
3533
3534                 if (len % sizeof(u32))
3535                         return -EINVAL;
3536
3537                 memcpy(settings->akm_suites, data, len);
3538
3539                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3540                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3541                                 return -EINVAL;
3542         }
3543
3544         return 0;
3545 }
3546
3547 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3548 {
3549         struct cfg80211_registered_device *rdev;
3550         struct net_device *dev;
3551         struct wireless_dev *wdev;
3552         struct cfg80211_crypto_settings crypto;
3553         struct ieee80211_channel *chan, *fixedchan;
3554         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3555         int err, ssid_len, ie_len = 0;
3556         bool use_mfp = false;
3557
3558         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3559                 return -EINVAL;
3560
3561         if (!info->attrs[NL80211_ATTR_MAC] ||
3562             !info->attrs[NL80211_ATTR_SSID] ||
3563             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3564                 return -EINVAL;
3565
3566         rtnl_lock();
3567
3568         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3569         if (err)
3570                 goto unlock_rtnl;
3571
3572         if (!rdev->ops->assoc) {
3573                 err = -EOPNOTSUPP;
3574                 goto out;
3575         }
3576
3577         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3578                 err = -EOPNOTSUPP;
3579                 goto out;
3580         }
3581
3582         if (!netif_running(dev)) {
3583                 err = -ENETDOWN;
3584                 goto out;
3585         }
3586
3587         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3588
3589         chan = ieee80211_get_channel(&rdev->wiphy,
3590                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3591         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3592                 err = -EINVAL;
3593                 goto out;
3594         }
3595
3596         mutex_lock(&rdev->devlist_mtx);
3597         wdev = dev->ieee80211_ptr;
3598         fixedchan = rdev_fixed_channel(rdev, wdev);
3599         if (fixedchan && chan != fixedchan) {
3600                 err = -EBUSY;
3601                 mutex_unlock(&rdev->devlist_mtx);
3602                 goto out;
3603         }
3604         mutex_unlock(&rdev->devlist_mtx);
3605
3606         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3607         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3608
3609         if (info->attrs[NL80211_ATTR_IE]) {
3610                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3611                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3612         }
3613
3614         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3615                 enum nl80211_mfp mfp =
3616                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3617                 if (mfp == NL80211_MFP_REQUIRED)
3618                         use_mfp = true;
3619                 else if (mfp != NL80211_MFP_NO) {
3620                         err = -EINVAL;
3621                         goto out;
3622                 }
3623         }
3624
3625         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3626                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3627
3628         err = nl80211_crypto_settings(info, &crypto, 1);
3629         if (!err)
3630                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3631                                           ssid, ssid_len, ie, ie_len, use_mfp,
3632                                           &crypto);
3633
3634 out:
3635         cfg80211_unlock_rdev(rdev);
3636         dev_put(dev);
3637 unlock_rtnl:
3638         rtnl_unlock();
3639         return err;
3640 }
3641
3642 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3643 {
3644         struct cfg80211_registered_device *rdev;
3645         struct net_device *dev;
3646         const u8 *ie = NULL, *bssid;
3647         int err, ie_len = 0;
3648         u16 reason_code;
3649
3650         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3651                 return -EINVAL;
3652
3653         if (!info->attrs[NL80211_ATTR_MAC])
3654                 return -EINVAL;
3655
3656         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3657                 return -EINVAL;
3658
3659         rtnl_lock();
3660
3661         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3662         if (err)
3663                 goto unlock_rtnl;
3664
3665         if (!rdev->ops->deauth) {
3666                 err = -EOPNOTSUPP;
3667                 goto out;
3668         }
3669
3670         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3671                 err = -EOPNOTSUPP;
3672                 goto out;
3673         }
3674
3675         if (!netif_running(dev)) {
3676                 err = -ENETDOWN;
3677                 goto out;
3678         }
3679
3680         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3681
3682         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3683         if (reason_code == 0) {
3684                 /* Reason Code 0 is reserved */
3685                 err = -EINVAL;
3686                 goto out;
3687         }
3688
3689         if (info->attrs[NL80211_ATTR_IE]) {
3690                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3691                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3692         }
3693
3694         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3695
3696 out:
3697         cfg80211_unlock_rdev(rdev);
3698         dev_put(dev);
3699 unlock_rtnl:
3700         rtnl_unlock();
3701         return err;
3702 }
3703
3704 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3705 {
3706         struct cfg80211_registered_device *rdev;
3707         struct net_device *dev;
3708         const u8 *ie = NULL, *bssid;
3709         int err, ie_len = 0;
3710         u16 reason_code;
3711
3712         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3713                 return -EINVAL;
3714
3715         if (!info->attrs[NL80211_ATTR_MAC])
3716                 return -EINVAL;
3717
3718         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3719                 return -EINVAL;
3720
3721         rtnl_lock();
3722
3723         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3724         if (err)
3725                 goto unlock_rtnl;
3726
3727         if (!rdev->ops->disassoc) {
3728                 err = -EOPNOTSUPP;
3729                 goto out;
3730         }
3731
3732         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3733                 err = -EOPNOTSUPP;
3734                 goto out;
3735         }
3736
3737         if (!netif_running(dev)) {
3738                 err = -ENETDOWN;
3739                 goto out;
3740         }
3741
3742         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3743
3744         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3745         if (reason_code == 0) {
3746                 /* Reason Code 0 is reserved */
3747                 err = -EINVAL;
3748                 goto out;
3749         }
3750
3751         if (info->attrs[NL80211_ATTR_IE]) {
3752                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3753                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3754         }
3755
3756         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3757
3758 out:
3759         cfg80211_unlock_rdev(rdev);
3760         dev_put(dev);
3761 unlock_rtnl:
3762         rtnl_unlock();
3763         return err;
3764 }
3765
3766 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3767 {
3768         struct cfg80211_registered_device *rdev;
3769         struct net_device *dev;
3770         struct cfg80211_ibss_params ibss;
3771         struct wiphy *wiphy;
3772         struct cfg80211_cached_keys *connkeys = NULL;
3773         int err;
3774
3775         memset(&ibss, 0, sizeof(ibss));
3776
3777         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3778                 return -EINVAL;
3779
3780         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3781             !info->attrs[NL80211_ATTR_SSID] ||
3782             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3783                 return -EINVAL;
3784
3785         ibss.beacon_interval = 100;
3786
3787         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3788                 ibss.beacon_interval =
3789                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3790                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3791                         return -EINVAL;
3792         }
3793
3794         rtnl_lock();
3795
3796         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3797         if (err)
3798                 goto unlock_rtnl;
3799
3800         if (!rdev->ops->join_ibss) {
3801                 err = -EOPNOTSUPP;
3802                 goto out;
3803         }
3804
3805         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3806                 err = -EOPNOTSUPP;
3807                 goto out;
3808         }
3809
3810         if (!netif_running(dev)) {
3811                 err = -ENETDOWN;
3812                 goto out;
3813         }
3814
3815         wiphy = &rdev->wiphy;
3816
3817         if (info->attrs[NL80211_ATTR_MAC])
3818                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3819         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3820         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3821
3822         if (info->attrs[NL80211_ATTR_IE]) {
3823                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3824                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3825         }
3826
3827         ibss.channel = ieee80211_get_channel(wiphy,
3828                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3829         if (!ibss.channel ||
3830             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3831             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3832                 err = -EINVAL;
3833                 goto out;
3834         }
3835
3836         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3837         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3838
3839         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3840                 connkeys = nl80211_parse_connkeys(rdev,
3841                                         info->attrs[NL80211_ATTR_KEYS]);
3842                 if (IS_ERR(connkeys)) {
3843                         err = PTR_ERR(connkeys);
3844                         connkeys = NULL;
3845                         goto out;
3846                 }
3847         }
3848
3849         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3850
3851 out:
3852         cfg80211_unlock_rdev(rdev);
3853         dev_put(dev);
3854 unlock_rtnl:
3855         if (err)
3856                 kfree(connkeys);
3857         rtnl_unlock();
3858         return err;
3859 }
3860
3861 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3862 {
3863         struct cfg80211_registered_device *rdev;
3864         struct net_device *dev;
3865         int err;
3866
3867         rtnl_lock();
3868
3869         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3870         if (err)
3871                 goto unlock_rtnl;
3872
3873         if (!rdev->ops->leave_ibss) {
3874                 err = -EOPNOTSUPP;
3875                 goto out;
3876         }
3877
3878         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3879                 err = -EOPNOTSUPP;
3880                 goto out;
3881         }
3882
3883         if (!netif_running(dev)) {
3884                 err = -ENETDOWN;
3885                 goto out;
3886         }
3887
3888         err = cfg80211_leave_ibss(rdev, dev, false);
3889
3890 out:
3891         cfg80211_unlock_rdev(rdev);
3892         dev_put(dev);
3893 unlock_rtnl:
3894         rtnl_unlock();
3895         return err;
3896 }
3897
3898 #ifdef CONFIG_NL80211_TESTMODE
3899 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3900         .name = "testmode",
3901 };
3902
3903 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3904 {
3905         struct cfg80211_registered_device *rdev;
3906         int err;
3907
3908         if (!info->attrs[NL80211_ATTR_TESTDATA])
3909                 return -EINVAL;
3910
3911         rtnl_lock();
3912
3913         rdev = cfg80211_get_dev_from_info(info);
3914         if (IS_ERR(rdev)) {
3915                 err = PTR_ERR(rdev);
3916                 goto unlock_rtnl;
3917         }
3918
3919         err = -EOPNOTSUPP;
3920         if (rdev->ops->testmode_cmd) {
3921                 rdev->testmode_info = info;
3922                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3923                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3924                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3925                 rdev->testmode_info = NULL;
3926         }
3927
3928         cfg80211_unlock_rdev(rdev);
3929
3930  unlock_rtnl:
3931         rtnl_unlock();
3932         return err;
3933 }
3934
3935 static struct sk_buff *
3936 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3937                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3938 {
3939         struct sk_buff *skb;
3940         void *hdr;
3941         struct nlattr *data;
3942
3943         skb = nlmsg_new(approxlen + 100, gfp);
3944         if (!skb)
3945                 return NULL;
3946
3947         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3948         if (!hdr) {
3949                 kfree_skb(skb);
3950                 return NULL;
3951         }
3952
3953         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3954         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3955
3956         ((void **)skb->cb)[0] = rdev;
3957         ((void **)skb->cb)[1] = hdr;
3958         ((void **)skb->cb)[2] = data;
3959
3960         return skb;
3961
3962  nla_put_failure:
3963         kfree_skb(skb);
3964         return NULL;
3965 }
3966
3967 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3968                                                   int approxlen)
3969 {
3970         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3971
3972         if (WARN_ON(!rdev->testmode_info))
3973                 return NULL;
3974
3975         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3976                                 rdev->testmode_info->snd_pid,
3977                                 rdev->testmode_info->snd_seq,
3978                                 GFP_KERNEL);
3979 }
3980 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3981
3982 int cfg80211_testmode_reply(struct sk_buff *skb)
3983 {
3984         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3985         void *hdr = ((void **)skb->cb)[1];
3986         struct nlattr *data = ((void **)skb->cb)[2];
3987
3988         if (WARN_ON(!rdev->testmode_info)) {
3989                 kfree_skb(skb);
3990                 return -EINVAL;
3991         }
3992
3993         nla_nest_end(skb, data);
3994         genlmsg_end(skb, hdr);
3995         return genlmsg_reply(skb, rdev->testmode_info);
3996 }
3997 EXPORT_SYMBOL(cfg80211_testmode_reply);
3998
3999 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4000                                                   int approxlen, gfp_t gfp)
4001 {
4002         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4003
4004         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4005 }
4006 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4007
4008 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4009 {
4010         void *hdr = ((void **)skb->cb)[1];
4011         struct nlattr *data = ((void **)skb->cb)[2];
4012
4013         nla_nest_end(skb, data);
4014         genlmsg_end(skb, hdr);
4015         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4016 }
4017 EXPORT_SYMBOL(cfg80211_testmode_event);
4018 #endif
4019
4020 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4021 {
4022         struct cfg80211_registered_device *rdev;
4023         struct net_device *dev;
4024         struct cfg80211_connect_params connect;
4025         struct wiphy *wiphy;
4026         struct cfg80211_cached_keys *connkeys = NULL;
4027         int err;
4028
4029         memset(&connect, 0, sizeof(connect));
4030
4031         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4032                 return -EINVAL;
4033
4034         if (!info->attrs[NL80211_ATTR_SSID] ||
4035             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4036                 return -EINVAL;
4037
4038         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4039                 connect.auth_type =
4040                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4041                 if (!nl80211_valid_auth_type(connect.auth_type))
4042                         return -EINVAL;
4043         } else
4044                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4045
4046         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4047
4048         err = nl80211_crypto_settings(info, &connect.crypto,
4049                                       NL80211_MAX_NR_CIPHER_SUITES);
4050         if (err)
4051                 return err;
4052         rtnl_lock();
4053
4054         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4055         if (err)
4056                 goto unlock_rtnl;
4057
4058         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4059                 err = -EOPNOTSUPP;
4060                 goto out;
4061         }
4062
4063         if (!netif_running(dev)) {
4064                 err = -ENETDOWN;
4065                 goto out;
4066         }
4067
4068         wiphy = &rdev->wiphy;
4069
4070         if (info->attrs[NL80211_ATTR_MAC])
4071                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4072         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4073         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4074
4075         if (info->attrs[NL80211_ATTR_IE]) {
4076                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4077                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4078         }
4079
4080         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4081                 connect.channel =
4082                         ieee80211_get_channel(wiphy,
4083                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4084                 if (!connect.channel ||
4085                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4086                         err = -EINVAL;
4087                         goto out;
4088                 }
4089         }
4090
4091         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4092                 connkeys = nl80211_parse_connkeys(rdev,
4093                                         info->attrs[NL80211_ATTR_KEYS]);
4094                 if (IS_ERR(connkeys)) {
4095                         err = PTR_ERR(connkeys);
4096                         connkeys = NULL;
4097                         goto out;
4098                 }
4099         }
4100
4101         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4102
4103 out:
4104         cfg80211_unlock_rdev(rdev);
4105         dev_put(dev);
4106 unlock_rtnl:
4107         if (err)
4108                 kfree(connkeys);
4109         rtnl_unlock();
4110         return err;
4111 }
4112
4113 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4114 {
4115         struct cfg80211_registered_device *rdev;
4116         struct net_device *dev;
4117         int err;
4118         u16 reason;
4119
4120         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4121                 reason = WLAN_REASON_DEAUTH_LEAVING;
4122         else
4123                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4124
4125         if (reason == 0)
4126                 return -EINVAL;
4127
4128         rtnl_lock();
4129
4130         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4131         if (err)
4132                 goto unlock_rtnl;
4133
4134         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4135                 err = -EOPNOTSUPP;
4136                 goto out;
4137         }
4138
4139         if (!netif_running(dev)) {
4140                 err = -ENETDOWN;
4141                 goto out;
4142         }
4143
4144         err = cfg80211_disconnect(rdev, dev, reason, true);
4145
4146 out:
4147         cfg80211_unlock_rdev(rdev);
4148         dev_put(dev);
4149 unlock_rtnl:
4150         rtnl_unlock();
4151         return err;
4152 }
4153
4154 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4155 {
4156         struct cfg80211_registered_device *rdev;
4157         struct net *net;
4158         int err;
4159         u32 pid;
4160
4161         if (!info->attrs[NL80211_ATTR_PID])
4162                 return -EINVAL;
4163
4164         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4165
4166         rtnl_lock();
4167
4168         rdev = cfg80211_get_dev_from_info(info);
4169         if (IS_ERR(rdev)) {
4170                 err = PTR_ERR(rdev);
4171                 goto out_rtnl;
4172         }
4173
4174         net = get_net_ns_by_pid(pid);
4175         if (IS_ERR(net)) {
4176                 err = PTR_ERR(net);
4177                 goto out;
4178         }
4179
4180         err = 0;
4181
4182         /* check if anything to do */
4183         if (net_eq(wiphy_net(&rdev->wiphy), net))
4184                 goto out_put_net;
4185
4186         err = cfg80211_switch_netns(rdev, net);
4187  out_put_net:
4188         put_net(net);
4189  out:
4190         cfg80211_unlock_rdev(rdev);
4191  out_rtnl:
4192         rtnl_unlock();
4193         return err;
4194 }
4195
4196 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4197 {
4198         struct cfg80211_registered_device *rdev;
4199         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4200                         struct cfg80211_pmksa *pmksa) = NULL;
4201         int err;
4202         struct net_device *dev;
4203         struct cfg80211_pmksa pmksa;
4204
4205         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4206
4207         if (!info->attrs[NL80211_ATTR_MAC])
4208                 return -EINVAL;
4209
4210         if (!info->attrs[NL80211_ATTR_PMKID])
4211                 return -EINVAL;
4212
4213         rtnl_lock();
4214
4215         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4216         if (err)
4217                 goto out_rtnl;
4218
4219         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4220         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4221
4222         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4223                 err = -EOPNOTSUPP;
4224                 goto out;
4225         }
4226
4227         switch (info->genlhdr->cmd) {
4228         case NL80211_CMD_SET_PMKSA:
4229                 rdev_ops = rdev->ops->set_pmksa;
4230                 break;
4231         case NL80211_CMD_DEL_PMKSA:
4232                 rdev_ops = rdev->ops->del_pmksa;
4233                 break;
4234         default:
4235                 WARN_ON(1);
4236                 break;
4237         }
4238
4239         if (!rdev_ops) {
4240                 err = -EOPNOTSUPP;
4241                 goto out;
4242         }
4243
4244         err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4245
4246  out:
4247         cfg80211_unlock_rdev(rdev);
4248         dev_put(dev);
4249  out_rtnl:
4250         rtnl_unlock();
4251
4252         return err;
4253 }
4254
4255 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4256 {
4257         struct cfg80211_registered_device *rdev;
4258         int err;
4259         struct net_device *dev;
4260
4261         rtnl_lock();
4262
4263         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4264         if (err)
4265                 goto out_rtnl;
4266
4267         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4268                 err = -EOPNOTSUPP;
4269                 goto out;
4270         }
4271
4272         if (!rdev->ops->flush_pmksa) {
4273                 err = -EOPNOTSUPP;
4274                 goto out;
4275         }
4276
4277         err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4278
4279  out:
4280         cfg80211_unlock_rdev(rdev);
4281         dev_put(dev);
4282  out_rtnl:
4283         rtnl_unlock();
4284
4285         return err;
4286
4287 }
4288
4289 static int nl80211_remain_on_channel(struct sk_buff *skb,
4290                                      struct genl_info *info)
4291 {
4292         struct cfg80211_registered_device *rdev;
4293         struct net_device *dev;
4294         struct ieee80211_channel *chan;
4295         struct sk_buff *msg;
4296         void *hdr;
4297         u64 cookie;
4298         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4299         u32 freq, duration;
4300         int err;
4301
4302         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4303             !info->attrs[NL80211_ATTR_DURATION])
4304                 return -EINVAL;
4305
4306         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4307
4308         /*
4309          * We should be on that channel for at least one jiffie,
4310          * and more than 5 seconds seems excessive.
4311          */
4312         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4313                 return -EINVAL;
4314
4315         rtnl_lock();
4316
4317         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4318         if (err)
4319                 goto unlock_rtnl;
4320
4321         if (!rdev->ops->remain_on_channel) {
4322                 err = -EOPNOTSUPP;
4323                 goto out;
4324         }
4325
4326         if (!netif_running(dev)) {
4327                 err = -ENETDOWN;
4328                 goto out;
4329         }
4330
4331         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4332                 channel_type = nla_get_u32(
4333                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4334                 if (channel_type != NL80211_CHAN_NO_HT &&
4335                     channel_type != NL80211_CHAN_HT20 &&
4336                     channel_type != NL80211_CHAN_HT40PLUS &&
4337                     channel_type != NL80211_CHAN_HT40MINUS)
4338                         err = -EINVAL;
4339                         goto out;
4340         }
4341
4342         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4343         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4344         if (chan == NULL) {
4345                 err = -EINVAL;
4346                 goto out;
4347         }
4348
4349         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4350         if (!msg) {
4351                 err = -ENOMEM;
4352                 goto out;
4353         }
4354
4355         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4356                              NL80211_CMD_REMAIN_ON_CHANNEL);
4357
4358         if (IS_ERR(hdr)) {
4359                 err = PTR_ERR(hdr);
4360                 goto free_msg;
4361         }
4362
4363         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4364                                            channel_type, duration, &cookie);
4365
4366         if (err)
4367                 goto free_msg;
4368
4369         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4370
4371         genlmsg_end(msg, hdr);
4372         err = genlmsg_reply(msg, info);
4373         goto out;
4374
4375  nla_put_failure:
4376         err = -ENOBUFS;
4377  free_msg:
4378         nlmsg_free(msg);
4379  out:
4380         cfg80211_unlock_rdev(rdev);
4381         dev_put(dev);
4382  unlock_rtnl:
4383         rtnl_unlock();
4384         return err;
4385 }
4386
4387 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4388                                             struct genl_info *info)
4389 {
4390         struct cfg80211_registered_device *rdev;
4391         struct net_device *dev;
4392         u64 cookie;
4393         int err;
4394
4395         if (!info->attrs[NL80211_ATTR_COOKIE])
4396                 return -EINVAL;
4397
4398         rtnl_lock();
4399
4400         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4401         if (err)
4402                 goto unlock_rtnl;
4403
4404         if (!rdev->ops->cancel_remain_on_channel) {
4405                 err = -EOPNOTSUPP;
4406                 goto out;
4407         }
4408
4409         if (!netif_running(dev)) {
4410                 err = -ENETDOWN;
4411                 goto out;
4412         }
4413
4414         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4415
4416         err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4417
4418  out:
4419         cfg80211_unlock_rdev(rdev);
4420         dev_put(dev);
4421  unlock_rtnl:
4422         rtnl_unlock();
4423         return err;
4424 }
4425
4426 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4427                            u8 *rates, u8 rates_len)
4428 {
4429         u8 i;
4430         u32 mask = 0;
4431
4432         for (i = 0; i < rates_len; i++) {
4433                 int rate = (rates[i] & 0x7f) * 5;
4434                 int ridx;
4435                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4436                         struct ieee80211_rate *srate =
4437                                 &sband->bitrates[ridx];
4438                         if (rate == srate->bitrate) {
4439                                 mask |= 1 << ridx;
4440                                 break;
4441                         }
4442                 }
4443                 if (ridx == sband->n_bitrates)
4444                         return 0; /* rate not found */
4445         }
4446
4447         return mask;
4448 }
4449
4450 static struct nla_policy
4451 nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] __read_mostly = {
4452         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4453                                     .len = NL80211_MAX_SUPP_RATES },
4454 };
4455
4456 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4457                                        struct genl_info *info)
4458 {
4459         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4460         struct cfg80211_registered_device *rdev;
4461         struct cfg80211_bitrate_mask mask;
4462         int err, rem, i;
4463         struct net_device *dev;
4464         struct nlattr *tx_rates;
4465         struct ieee80211_supported_band *sband;
4466
4467         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4468                 return -EINVAL;
4469
4470         rtnl_lock();
4471
4472         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4473         if (err)
4474                 goto unlock_rtnl;
4475
4476         if (!rdev->ops->set_bitrate_mask) {
4477                 err = -EOPNOTSUPP;
4478                 goto unlock;
4479         }
4480
4481         memset(&mask, 0, sizeof(mask));
4482         /* Default to all rates enabled */
4483         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4484                 sband = rdev->wiphy.bands[i];
4485                 mask.control[i].legacy =
4486                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4487         }
4488
4489         /*
4490          * The nested attribute uses enum nl80211_band as the index. This maps
4491          * directly to the enum ieee80211_band values used in cfg80211.
4492          */
4493         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4494         {
4495                 enum ieee80211_band band = nla_type(tx_rates);
4496                 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4497                         err = -EINVAL;
4498                         goto unlock;
4499                 }
4500                 sband = rdev->wiphy.bands[band];
4501                 if (sband == NULL) {
4502                         err = -EINVAL;
4503                         goto unlock;
4504                 }
4505                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4506                           nla_len(tx_rates), nl80211_txattr_policy);
4507                 if (tb[NL80211_TXRATE_LEGACY]) {
4508                         mask.control[band].legacy = rateset_to_mask(
4509                                 sband,
4510                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4511                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4512                         if (mask.control[band].legacy == 0) {
4513                                 err = -EINVAL;
4514                                 goto unlock;
4515                         }
4516                 }
4517         }
4518
4519         err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4520
4521  unlock:
4522         dev_put(dev);
4523         cfg80211_unlock_rdev(rdev);
4524  unlock_rtnl:
4525         rtnl_unlock();
4526         return err;
4527 }
4528
4529 static struct genl_ops nl80211_ops[] = {
4530         {
4531                 .cmd = NL80211_CMD_GET_WIPHY,
4532                 .doit = nl80211_get_wiphy,
4533                 .dumpit = nl80211_dump_wiphy,
4534                 .policy = nl80211_policy,
4535                 /* can be retrieved by unprivileged users */
4536         },
4537         {
4538                 .cmd = NL80211_CMD_SET_WIPHY,
4539                 .doit = nl80211_set_wiphy,
4540                 .policy = nl80211_policy,
4541                 .flags = GENL_ADMIN_PERM,
4542         },
4543         {
4544                 .cmd = NL80211_CMD_GET_INTERFACE,
4545                 .doit = nl80211_get_interface,
4546                 .dumpit = nl80211_dump_interface,
4547                 .policy = nl80211_policy,
4548                 /* can be retrieved by unprivileged users */
4549         },
4550         {
4551                 .cmd = NL80211_CMD_SET_INTERFACE,
4552                 .doit = nl80211_set_interface,
4553                 .policy = nl80211_policy,
4554                 .flags = GENL_ADMIN_PERM,
4555         },
4556         {
4557                 .cmd = NL80211_CMD_NEW_INTERFACE,
4558                 .doit = nl80211_new_interface,
4559                 .policy = nl80211_policy,
4560                 .flags = GENL_ADMIN_PERM,
4561         },
4562         {
4563                 .cmd = NL80211_CMD_DEL_INTERFACE,
4564                 .doit = nl80211_del_interface,
4565                 .policy = nl80211_policy,
4566                 .flags = GENL_ADMIN_PERM,
4567         },
4568         {
4569                 .cmd = NL80211_CMD_GET_KEY,
4570                 .doit = nl80211_get_key,
4571                 .policy = nl80211_policy,
4572                 .flags = GENL_ADMIN_PERM,
4573         },
4574         {
4575                 .cmd = NL80211_CMD_SET_KEY,
4576                 .doit = nl80211_set_key,
4577                 .policy = nl80211_policy,
4578                 .flags = GENL_ADMIN_PERM,
4579         },
4580         {
4581                 .cmd = NL80211_CMD_NEW_KEY,
4582                 .doit = nl80211_new_key,
4583                 .policy = nl80211_policy,
4584                 .flags = GENL_ADMIN_PERM,
4585         },
4586         {
4587                 .cmd = NL80211_CMD_DEL_KEY,
4588                 .doit = nl80211_del_key,
4589                 .policy = nl80211_policy,
4590                 .flags = GENL_ADMIN_PERM,
4591         },
4592         {
4593                 .cmd = NL80211_CMD_SET_BEACON,
4594                 .policy = nl80211_policy,
4595                 .flags = GENL_ADMIN_PERM,
4596                 .doit = nl80211_addset_beacon,
4597         },
4598         {
4599                 .cmd = NL80211_CMD_NEW_BEACON,
4600                 .policy = nl80211_policy,
4601                 .flags = GENL_ADMIN_PERM,
4602                 .doit = nl80211_addset_beacon,
4603         },
4604         {
4605                 .cmd = NL80211_CMD_DEL_BEACON,
4606                 .policy = nl80211_policy,
4607                 .flags = GENL_ADMIN_PERM,
4608                 .doit = nl80211_del_beacon,
4609         },
4610         {
4611                 .cmd = NL80211_CMD_GET_STATION,
4612                 .doit = nl80211_get_station,
4613                 .dumpit = nl80211_dump_station,
4614                 .policy = nl80211_policy,
4615         },
4616         {
4617                 .cmd = NL80211_CMD_SET_STATION,
4618                 .doit = nl80211_set_station,
4619                 .policy = nl80211_policy,
4620                 .flags = GENL_ADMIN_PERM,
4621         },
4622         {
4623                 .cmd = NL80211_CMD_NEW_STATION,
4624                 .doit = nl80211_new_station,
4625                 .policy = nl80211_policy,
4626                 .flags = GENL_ADMIN_PERM,
4627         },
4628         {
4629                 .cmd = NL80211_CMD_DEL_STATION,
4630                 .doit = nl80211_del_station,
4631                 .policy = nl80211_policy,
4632                 .flags = GENL_ADMIN_PERM,
4633         },
4634         {
4635                 .cmd = NL80211_CMD_GET_MPATH,
4636                 .doit = nl80211_get_mpath,
4637                 .dumpit = nl80211_dump_mpath,
4638                 .policy = nl80211_policy,
4639                 .flags = GENL_ADMIN_PERM,
4640         },
4641         {
4642                 .cmd = NL80211_CMD_SET_MPATH,
4643                 .doit = nl80211_set_mpath,
4644                 .policy = nl80211_policy,
4645                 .flags = GENL_ADMIN_PERM,
4646         },
4647         {
4648                 .cmd = NL80211_CMD_NEW_MPATH,
4649                 .doit = nl80211_new_mpath,
4650                 .policy = nl80211_policy,
4651                 .flags = GENL_ADMIN_PERM,
4652         },
4653         {
4654                 .cmd = NL80211_CMD_DEL_MPATH,
4655                 .doit = nl80211_del_mpath,
4656                 .policy = nl80211_policy,
4657                 .flags = GENL_ADMIN_PERM,
4658         },
4659         {
4660                 .cmd = NL80211_CMD_SET_BSS,
4661                 .doit = nl80211_set_bss,
4662                 .policy = nl80211_policy,
4663                 .flags = GENL_ADMIN_PERM,
4664         },
4665         {
4666                 .cmd = NL80211_CMD_GET_REG,
4667                 .doit = nl80211_get_reg,
4668                 .policy = nl80211_policy,
4669                 /* can be retrieved by unprivileged users */
4670         },
4671         {
4672                 .cmd = NL80211_CMD_SET_REG,
4673                 .doit = nl80211_set_reg,
4674                 .policy = nl80211_policy,
4675                 .flags = GENL_ADMIN_PERM,
4676         },
4677         {
4678                 .cmd = NL80211_CMD_REQ_SET_REG,
4679                 .doit = nl80211_req_set_reg,
4680                 .policy = nl80211_policy,
4681                 .flags = GENL_ADMIN_PERM,
4682         },
4683         {
4684                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4685                 .doit = nl80211_get_mesh_params,
4686                 .policy = nl80211_policy,
4687                 /* can be retrieved by unprivileged users */
4688         },
4689         {
4690                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4691                 .doit = nl80211_set_mesh_params,
4692                 .policy = nl80211_policy,
4693                 .flags = GENL_ADMIN_PERM,
4694         },
4695         {
4696                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4697                 .doit = nl80211_trigger_scan,
4698                 .policy = nl80211_policy,
4699                 .flags = GENL_ADMIN_PERM,
4700         },
4701         {
4702                 .cmd = NL80211_CMD_GET_SCAN,
4703                 .policy = nl80211_policy,
4704                 .dumpit = nl80211_dump_scan,
4705         },
4706         {
4707                 .cmd = NL80211_CMD_AUTHENTICATE,
4708                 .doit = nl80211_authenticate,
4709                 .policy = nl80211_policy,
4710                 .flags = GENL_ADMIN_PERM,
4711         },
4712         {
4713                 .cmd = NL80211_CMD_ASSOCIATE,
4714                 .doit = nl80211_associate,
4715                 .policy = nl80211_policy,
4716                 .flags = GENL_ADMIN_PERM,
4717         },
4718         {
4719                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4720                 .doit = nl80211_deauthenticate,
4721                 .policy = nl80211_policy,
4722                 .flags = GENL_ADMIN_PERM,
4723         },
4724         {
4725                 .cmd = NL80211_CMD_DISASSOCIATE,
4726                 .doit = nl80211_disassociate,
4727                 .policy = nl80211_policy,
4728                 .flags = GENL_ADMIN_PERM,
4729         },
4730         {
4731                 .cmd = NL80211_CMD_JOIN_IBSS,
4732                 .doit = nl80211_join_ibss,
4733                 .policy = nl80211_policy,
4734                 .flags = GENL_ADMIN_PERM,
4735         },
4736         {
4737                 .cmd = NL80211_CMD_LEAVE_IBSS,
4738                 .doit = nl80211_leave_ibss,
4739                 .policy = nl80211_policy,
4740                 .flags = GENL_ADMIN_PERM,
4741         },
4742 #ifdef CONFIG_NL80211_TESTMODE
4743         {
4744                 .cmd = NL80211_CMD_TESTMODE,
4745                 .doit = nl80211_testmode_do,
4746                 .policy = nl80211_policy,
4747                 .flags = GENL_ADMIN_PERM,
4748         },
4749 #endif
4750         {
4751                 .cmd = NL80211_CMD_CONNECT,
4752                 .doit = nl80211_connect,
4753                 .policy = nl80211_policy,
4754                 .flags = GENL_ADMIN_PERM,
4755         },
4756         {
4757                 .cmd = NL80211_CMD_DISCONNECT,
4758                 .doit = nl80211_disconnect,
4759                 .policy = nl80211_policy,
4760                 .flags = GENL_ADMIN_PERM,
4761         },
4762         {
4763                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4764                 .doit = nl80211_wiphy_netns,
4765                 .policy = nl80211_policy,
4766                 .flags = GENL_ADMIN_PERM,
4767         },
4768         {
4769                 .cmd = NL80211_CMD_GET_SURVEY,
4770                 .policy = nl80211_policy,
4771                 .dumpit = nl80211_dump_survey,
4772         },
4773         {
4774                 .cmd = NL80211_CMD_SET_PMKSA,
4775                 .doit = nl80211_setdel_pmksa,
4776                 .policy = nl80211_policy,
4777                 .flags = GENL_ADMIN_PERM,
4778         },
4779         {
4780                 .cmd = NL80211_CMD_DEL_PMKSA,
4781                 .doit = nl80211_setdel_pmksa,
4782                 .policy = nl80211_policy,
4783                 .flags = GENL_ADMIN_PERM,
4784         },
4785         {
4786                 .cmd = NL80211_CMD_FLUSH_PMKSA,
4787                 .doit = nl80211_flush_pmksa,
4788                 .policy = nl80211_policy,
4789                 .flags = GENL_ADMIN_PERM,
4790         },
4791         {
4792                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
4793                 .doit = nl80211_remain_on_channel,
4794                 .policy = nl80211_policy,
4795                 .flags = GENL_ADMIN_PERM,
4796         },
4797         {
4798                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
4799                 .doit = nl80211_cancel_remain_on_channel,
4800                 .policy = nl80211_policy,
4801                 .flags = GENL_ADMIN_PERM,
4802         },
4803         {
4804                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
4805                 .doit = nl80211_set_tx_bitrate_mask,
4806                 .policy = nl80211_policy,
4807                 .flags = GENL_ADMIN_PERM,
4808         },
4809 };
4810
4811 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4812         .name = "mlme",
4813 };
4814
4815 /* multicast groups */
4816 static struct genl_multicast_group nl80211_config_mcgrp = {
4817         .name = "config",
4818 };
4819 static struct genl_multicast_group nl80211_scan_mcgrp = {
4820         .name = "scan",
4821 };
4822 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4823         .name = "regulatory",
4824 };
4825
4826 /* notification functions */
4827
4828 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4829 {
4830         struct sk_buff *msg;
4831
4832         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4833         if (!msg)
4834                 return;
4835
4836         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4837                 nlmsg_free(msg);
4838                 return;
4839         }
4840
4841         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4842                                 nl80211_config_mcgrp.id, GFP_KERNEL);
4843 }
4844
4845 static int nl80211_add_scan_req(struct sk_buff *msg,
4846                                 struct cfg80211_registered_device *rdev)
4847 {
4848         struct cfg80211_scan_request *req = rdev->scan_req;
4849         struct nlattr *nest;
4850         int i;
4851
4852         ASSERT_RDEV_LOCK(rdev);
4853
4854         if (WARN_ON(!req))
4855                 return 0;
4856
4857         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4858         if (!nest)
4859                 goto nla_put_failure;
4860         for (i = 0; i < req->n_ssids; i++)
4861                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4862         nla_nest_end(msg, nest);
4863
4864         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4865         if (!nest)
4866                 goto nla_put_failure;
4867         for (i = 0; i < req->n_channels; i++)
4868                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4869         nla_nest_end(msg, nest);
4870
4871         if (req->ie)
4872                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4873
4874         return 0;
4875  nla_put_failure:
4876         return -ENOBUFS;
4877 }
4878
4879 static int nl80211_send_scan_msg(struct sk_buff *msg,
4880                                  struct cfg80211_registered_device *rdev,
4881                                  struct net_device *netdev,
4882                                  u32 pid, u32 seq, int flags,
4883                                  u32 cmd)
4884 {
4885         void *hdr;
4886
4887         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4888         if (!hdr)
4889                 return -1;
4890
4891         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4892         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4893
4894         /* ignore errors and send incomplete event anyway */
4895         nl80211_add_scan_req(msg, rdev);
4896
4897         return genlmsg_end(msg, hdr);
4898
4899  nla_put_failure:
4900         genlmsg_cancel(msg, hdr);
4901         return -EMSGSIZE;
4902 }
4903
4904 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4905                              struct net_device *netdev)
4906 {
4907         struct sk_buff *msg;
4908
4909         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4910         if (!msg)
4911                 return;
4912
4913         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4914                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
4915                 nlmsg_free(msg);
4916                 return;
4917         }
4918
4919         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4920                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4921 }
4922
4923 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4924                             struct net_device *netdev)
4925 {
4926         struct sk_buff *msg;
4927
4928         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4929         if (!msg)
4930                 return;
4931
4932         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4933                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4934                 nlmsg_free(msg);
4935                 return;
4936         }
4937
4938         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4939                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4940 }
4941
4942 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4943                                struct net_device *netdev)
4944 {
4945         struct sk_buff *msg;
4946
4947         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4948         if (!msg)
4949                 return;
4950
4951         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4952                                   NL80211_CMD_SCAN_ABORTED) < 0) {
4953                 nlmsg_free(msg);
4954                 return;
4955         }
4956
4957         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4958                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4959 }
4960
4961 /*
4962  * This can happen on global regulatory changes or device specific settings
4963  * based on custom world regulatory domains.
4964  */
4965 void nl80211_send_reg_change_event(struct regulatory_request *request)
4966 {
4967         struct sk_buff *msg;
4968         void *hdr;
4969
4970         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4971         if (!msg)
4972                 return;
4973
4974         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
4975         if (!hdr) {
4976                 nlmsg_free(msg);
4977                 return;
4978         }
4979
4980         /* Userspace can always count this one always being set */
4981         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
4982
4983         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
4984                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4985                            NL80211_REGDOM_TYPE_WORLD);
4986         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
4987                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4988                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
4989         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
4990                  request->intersect)
4991                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4992                            NL80211_REGDOM_TYPE_INTERSECTION);
4993         else {
4994                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4995                            NL80211_REGDOM_TYPE_COUNTRY);
4996                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
4997         }
4998
4999         if (wiphy_idx_valid(request->wiphy_idx))
5000                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5001
5002         if (genlmsg_end(msg, hdr) < 0) {
5003                 nlmsg_free(msg);
5004                 return;
5005         }
5006
5007         rcu_read_lock();
5008         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5009                                 GFP_ATOMIC);
5010         rcu_read_unlock();
5011
5012         return;
5013
5014 nla_put_failure:
5015         genlmsg_cancel(msg, hdr);
5016         nlmsg_free(msg);
5017 }
5018
5019 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5020                                     struct net_device *netdev,
5021                                     const u8 *buf, size_t len,
5022                                     enum nl80211_commands cmd, gfp_t gfp)
5023 {
5024         struct sk_buff *msg;
5025         void *hdr;
5026
5027         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5028         if (!msg)
5029                 return;
5030
5031         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5032         if (!hdr) {
5033                 nlmsg_free(msg);
5034                 return;
5035         }
5036
5037         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5038         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5039         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5040
5041         if (genlmsg_end(msg, hdr) < 0) {
5042                 nlmsg_free(msg);
5043                 return;
5044         }
5045
5046         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5047                                 nl80211_mlme_mcgrp.id, gfp);
5048         return;
5049
5050  nla_put_failure:
5051         genlmsg_cancel(msg, hdr);
5052         nlmsg_free(msg);
5053 }
5054
5055 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5056                           struct net_device *netdev, const u8 *buf,
5057                           size_t len, gfp_t gfp)
5058 {
5059         nl80211_send_mlme_event(rdev, netdev, buf, len,
5060                                 NL80211_CMD_AUTHENTICATE, gfp);
5061 }
5062
5063 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5064                            struct net_device *netdev, const u8 *buf,
5065                            size_t len, gfp_t gfp)
5066 {
5067         nl80211_send_mlme_event(rdev, netdev, buf, len,
5068                                 NL80211_CMD_ASSOCIATE, gfp);
5069 }
5070
5071 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5072                          struct net_device *netdev, const u8 *buf,
5073                          size_t len, gfp_t gfp)
5074 {
5075         nl80211_send_mlme_event(rdev, netdev, buf, len,
5076                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5077 }
5078
5079 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5080                            struct net_device *netdev, const u8 *buf,
5081                            size_t len, gfp_t gfp)
5082 {
5083         nl80211_send_mlme_event(rdev, netdev, buf, len,
5084                                 NL80211_CMD_DISASSOCIATE, gfp);
5085 }
5086
5087 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5088                                       struct net_device *netdev, int cmd,
5089                                       const u8 *addr, gfp_t gfp)
5090 {
5091         struct sk_buff *msg;
5092         void *hdr;
5093
5094         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5095         if (!msg)
5096                 return;
5097
5098         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5099         if (!hdr) {
5100                 nlmsg_free(msg);
5101                 return;
5102         }
5103
5104         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5105         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5106         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5107         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5108
5109         if (genlmsg_end(msg, hdr) < 0) {
5110                 nlmsg_free(msg);
5111                 return;
5112         }
5113
5114         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5115                                 nl80211_mlme_mcgrp.id, gfp);
5116         return;
5117
5118  nla_put_failure:
5119         genlmsg_cancel(msg, hdr);
5120         nlmsg_free(msg);
5121 }
5122
5123 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5124                                struct net_device *netdev, const u8 *addr,
5125                                gfp_t gfp)
5126 {
5127         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5128                                   addr, gfp);
5129 }
5130
5131 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5132                                 struct net_device *netdev, const u8 *addr,
5133                                 gfp_t gfp)
5134 {
5135         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5136                                   addr, gfp);
5137 }
5138
5139 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5140                                  struct net_device *netdev, const u8 *bssid,
5141                                  const u8 *req_ie, size_t req_ie_len,
5142                                  const u8 *resp_ie, size_t resp_ie_len,
5143                                  u16 status, gfp_t gfp)
5144 {
5145         struct sk_buff *msg;
5146         void *hdr;
5147
5148         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5149         if (!msg)
5150                 return;
5151
5152         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5153         if (!hdr) {
5154                 nlmsg_free(msg);
5155                 return;
5156         }
5157
5158         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5159         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5160         if (bssid)
5161                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5162         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5163         if (req_ie)
5164                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5165         if (resp_ie)
5166                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5167
5168         if (genlmsg_end(msg, hdr) < 0) {
5169                 nlmsg_free(msg);
5170                 return;
5171         }
5172
5173         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5174                                 nl80211_mlme_mcgrp.id, gfp);
5175         return;
5176
5177  nla_put_failure:
5178         genlmsg_cancel(msg, hdr);
5179         nlmsg_free(msg);
5180
5181 }
5182
5183 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5184                          struct net_device *netdev, const u8 *bssid,
5185                          const u8 *req_ie, size_t req_ie_len,
5186                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5187 {
5188         struct sk_buff *msg;
5189         void *hdr;
5190
5191         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5192         if (!msg)
5193                 return;
5194
5195         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5196         if (!hdr) {
5197                 nlmsg_free(msg);
5198                 return;
5199         }
5200
5201         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5202         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5203         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5204         if (req_ie)
5205                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5206         if (resp_ie)
5207                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5208
5209         if (genlmsg_end(msg, hdr) < 0) {
5210                 nlmsg_free(msg);
5211                 return;
5212         }
5213
5214         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5215                                 nl80211_mlme_mcgrp.id, gfp);
5216         return;
5217
5218  nla_put_failure:
5219         genlmsg_cancel(msg, hdr);
5220         nlmsg_free(msg);
5221
5222 }
5223
5224 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5225                                struct net_device *netdev, u16 reason,
5226                                const u8 *ie, size_t ie_len, bool from_ap)
5227 {
5228         struct sk_buff *msg;
5229         void *hdr;
5230
5231         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5232         if (!msg)
5233                 return;
5234
5235         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5236         if (!hdr) {
5237                 nlmsg_free(msg);
5238                 return;
5239         }
5240
5241         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5242         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5243         if (from_ap && reason)
5244                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5245         if (from_ap)
5246                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5247         if (ie)
5248                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5249
5250         if (genlmsg_end(msg, hdr) < 0) {
5251                 nlmsg_free(msg);
5252                 return;
5253         }
5254
5255         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5256                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5257         return;
5258
5259  nla_put_failure:
5260         genlmsg_cancel(msg, hdr);
5261         nlmsg_free(msg);
5262
5263 }
5264
5265 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5266                              struct net_device *netdev, const u8 *bssid,
5267                              gfp_t gfp)
5268 {
5269         struct sk_buff *msg;
5270         void *hdr;
5271
5272         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5273         if (!msg)
5274                 return;
5275
5276         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5277         if (!hdr) {
5278                 nlmsg_free(msg);
5279                 return;
5280         }
5281
5282         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5283         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5284         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5285
5286         if (genlmsg_end(msg, hdr) < 0) {
5287                 nlmsg_free(msg);
5288                 return;
5289         }
5290
5291         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5292                                 nl80211_mlme_mcgrp.id, gfp);
5293         return;
5294
5295  nla_put_failure:
5296         genlmsg_cancel(msg, hdr);
5297         nlmsg_free(msg);
5298 }
5299
5300 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5301                                  struct net_device *netdev, const u8 *addr,
5302                                  enum nl80211_key_type key_type, int key_id,
5303                                  const u8 *tsc, gfp_t gfp)
5304 {
5305         struct sk_buff *msg;
5306         void *hdr;
5307
5308         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5309         if (!msg)
5310                 return;
5311
5312         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5313         if (!hdr) {
5314                 nlmsg_free(msg);
5315                 return;
5316         }
5317
5318         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5319         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5320         if (addr)
5321                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5322         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5323         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5324         if (tsc)
5325                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5326
5327         if (genlmsg_end(msg, hdr) < 0) {
5328                 nlmsg_free(msg);
5329                 return;
5330         }
5331
5332         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5333                                 nl80211_mlme_mcgrp.id, gfp);
5334         return;
5335
5336  nla_put_failure:
5337         genlmsg_cancel(msg, hdr);
5338         nlmsg_free(msg);
5339 }
5340
5341 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5342                                     struct ieee80211_channel *channel_before,
5343                                     struct ieee80211_channel *channel_after)
5344 {
5345         struct sk_buff *msg;
5346         void *hdr;
5347         struct nlattr *nl_freq;
5348
5349         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5350         if (!msg)
5351                 return;
5352
5353         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5354         if (!hdr) {
5355                 nlmsg_free(msg);
5356                 return;
5357         }
5358
5359         /*
5360          * Since we are applying the beacon hint to a wiphy we know its
5361          * wiphy_idx is valid
5362          */
5363         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5364
5365         /* Before */
5366         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5367         if (!nl_freq)
5368                 goto nla_put_failure;
5369         if (nl80211_msg_put_channel(msg, channel_before))
5370                 goto nla_put_failure;
5371         nla_nest_end(msg, nl_freq);
5372
5373         /* After */
5374         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5375         if (!nl_freq)
5376                 goto nla_put_failure;
5377         if (nl80211_msg_put_channel(msg, channel_after))
5378                 goto nla_put_failure;
5379         nla_nest_end(msg, nl_freq);
5380
5381         if (genlmsg_end(msg, hdr) < 0) {
5382                 nlmsg_free(msg);
5383                 return;
5384         }
5385
5386         rcu_read_lock();
5387         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5388                                 GFP_ATOMIC);
5389         rcu_read_unlock();
5390
5391         return;
5392
5393 nla_put_failure:
5394         genlmsg_cancel(msg, hdr);
5395         nlmsg_free(msg);
5396 }
5397
5398 static void nl80211_send_remain_on_chan_event(
5399         int cmd, struct cfg80211_registered_device *rdev,
5400         struct net_device *netdev, u64 cookie,
5401         struct ieee80211_channel *chan,
5402         enum nl80211_channel_type channel_type,
5403         unsigned int duration, gfp_t gfp)
5404 {
5405         struct sk_buff *msg;
5406         void *hdr;
5407
5408         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5409         if (!msg)
5410                 return;
5411
5412         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5413         if (!hdr) {
5414                 nlmsg_free(msg);
5415                 return;
5416         }
5417
5418         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5419         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5420         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5421         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5422         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5423
5424         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5425                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5426
5427         if (genlmsg_end(msg, hdr) < 0) {
5428                 nlmsg_free(msg);
5429                 return;
5430         }
5431
5432         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5433                                 nl80211_mlme_mcgrp.id, gfp);
5434         return;
5435
5436  nla_put_failure:
5437         genlmsg_cancel(msg, hdr);
5438         nlmsg_free(msg);
5439 }
5440
5441 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5442                                     struct net_device *netdev, u64 cookie,
5443                                     struct ieee80211_channel *chan,
5444                                     enum nl80211_channel_type channel_type,
5445                                     unsigned int duration, gfp_t gfp)
5446 {
5447         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5448                                           rdev, netdev, cookie, chan,
5449                                           channel_type, duration, gfp);
5450 }
5451
5452 void nl80211_send_remain_on_channel_cancel(
5453         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5454         u64 cookie, struct ieee80211_channel *chan,
5455         enum nl80211_channel_type channel_type, gfp_t gfp)
5456 {
5457         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5458                                           rdev, netdev, cookie, chan,
5459                                           channel_type, 0, gfp);
5460 }
5461
5462 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5463                             struct net_device *dev, const u8 *mac_addr,
5464                             struct station_info *sinfo, gfp_t gfp)
5465 {
5466         struct sk_buff *msg;
5467
5468         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5469         if (!msg)
5470                 return;
5471
5472         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5473                 nlmsg_free(msg);
5474                 return;
5475         }
5476
5477         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5478                                 nl80211_mlme_mcgrp.id, gfp);
5479 }
5480
5481 /* initialisation/exit functions */
5482
5483 int nl80211_init(void)
5484 {
5485         int err;
5486
5487         err = genl_register_family_with_ops(&nl80211_fam,
5488                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5489         if (err)
5490                 return err;
5491
5492         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5493         if (err)
5494                 goto err_out;
5495
5496         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5497         if (err)
5498                 goto err_out;
5499
5500         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5501         if (err)
5502                 goto err_out;
5503
5504         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5505         if (err)
5506                 goto err_out;
5507
5508 #ifdef CONFIG_NL80211_TESTMODE
5509         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5510         if (err)
5511                 goto err_out;
5512 #endif
5513
5514         return 0;
5515  err_out:
5516         genl_unregister_family(&nl80211_fam);
5517         return err;
5518 }
5519
5520 void nl80211_exit(void)
5521 {
5522         genl_unregister_family(&nl80211_fam);
5523 }