net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2009  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/list.h>
  11 #include <linux/if_ether.h>
  12 #include <linux/ieee80211.h>
  13 #include <linux/nl80211.h>
  14 #include <linux/rtnetlink.h>
  15 #include <linux/netlink.h>
  16 #include <linux/etherdevice.h>
  17 #include <net/net_namespace.h>
  18 #include <net/genetlink.h>
  19 #include <net/cfg80211.h>
  20 #include <net/sock.h>
  21 #include "core.h"
  22 #include "nl80211.h"
  23 #include "reg.h"
  24
  25 /* the netlink family */
  26 static struct genl_family nl80211_fam = {
  27         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  28         .name = "nl80211",      /* have users key off the name instead */
  29         .hdrsize = 0,           /* no private header */
  30         .version = 1,           /* no particular meaning now */
  31         .maxattr = NL80211_ATTR_MAX,
  32         .netnsok = true,
  33 };
  34
  35 /* internal helper: get rdev and dev */
  36 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  37                                        struct cfg80211_registered_device **rdev,
  38                                        struct net_device **dev)
  39 {
  40         struct nlattr **attrs = info->attrs;
  41         int ifindex;
  42
  43         if (!attrs[NL80211_ATTR_IFINDEX])
  44                 return -EINVAL;
  45
  46         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  47         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  48         if (!*dev)
  49                 return -ENODEV;
  50
  51         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  52         if (IS_ERR(*rdev)) {
  53                 dev_put(*dev);
  54                 return PTR_ERR(*rdev);
  55         }
  56
  57         return 0;
  58 }
  59
  60 /* policy for the attributes */
  61 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
  62         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  63         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  64                                       .len = 20-1 },
  65         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  66         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  67         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  69         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  72
  73         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  74         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  75         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  76
  77         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  78         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  79
  80         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  81         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  82                                     .len = WLAN_MAX_KEY_LEN },
  83         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  84         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  85         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  86         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  87
  88         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  89         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  90         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  91                                        .len = IEEE80211_MAX_DATA_LEN },
  92         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  93                                        .len = IEEE80211_MAX_DATA_LEN },
  94         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  95         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  96         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  97         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  98                                                .len = NL80211_MAX_SUPP_RATES },
  99         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 100         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 101         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 102         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 103                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 104         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 105
 106         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 107         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 108
 109         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 110         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 111         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 113                                            .len = NL80211_MAX_SUPP_RATES },
 114
 115         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 116
 117         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 118                                          .len = NL80211_HT_CAPABILITY_LEN },
 119
 120         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 121         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 122                               .len = IEEE80211_MAX_DATA_LEN },
 123         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 124         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 125
 126         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 127                                 .len = IEEE80211_MAX_SSID_LEN },
 128         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 129         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 130         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 131         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 132         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 133         [NL80211_ATTR_STA_FLAGS2] = {
 134                 .len = sizeof(struct nl80211_sta_flag_update),
 135         },
 136         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 137         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 138         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 139         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 140         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 141 };
 142
 143 /* policy for the attributes */
 144 static struct nla_policy
 145 nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
 146         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 147         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 148         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 149         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 150         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 151         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 152 };
 153
 154 /* IE validation */
 155 static bool is_valid_ie_attr(const struct nlattr *attr)
 156 {
 157         const u8 *pos;
 158         int len;
 159
 160         if (!attr)
 161                 return true;
 162
 163         pos = nla_data(attr);
 164         len = nla_len(attr);
 165
 166         while (len) {
 167                 u8 elemlen;
 168
 169                 if (len < 2)
 170                         return false;
 171                 len -= 2;
 172
 173                 elemlen = pos[1];
 174                 if (elemlen > len)
 175                         return false;
 176
 177                 len -= elemlen;
 178                 pos += 2 + elemlen;
 179         }
 180
 181         return true;
 182 }
 183
 184 /* message building helper */
 185 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 186                                    int flags, u8 cmd)
 187 {
 188         /* since there is no private header just add the generic one */
 189         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 190 }
 191
 192 static int nl80211_msg_put_channel(struct sk_buff *msg,
 193                                    struct ieee80211_channel *chan)
 194 {
 195         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 196                     chan->center_freq);
 197
 198         if (chan->flags & IEEE80211_CHAN_DISABLED)
 199                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 200         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 201                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 202         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 203                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 204         if (chan->flags & IEEE80211_CHAN_RADAR)
 205                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 206
 207         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 208                     DBM_TO_MBM(chan->max_power));
 209
 210         return 0;
 211
 212  nla_put_failure:
 213         return -ENOBUFS;
 214 }
 215
 216 /* netlink command implementations */
 217
 218 struct key_parse {
 219         struct key_params p;
 220         int idx;
 221         bool def, defmgmt;
 222 };
 223
 224 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 225 {
 226         struct nlattr *tb[NL80211_KEY_MAX + 1];
 227         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 228                                    nl80211_key_policy);
 229         if (err)
 230                 return err;
 231
 232         k->def = !!tb[NL80211_KEY_DEFAULT];
 233         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 234
 235         if (tb[NL80211_KEY_IDX])
 236                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 237
 238         if (tb[NL80211_KEY_DATA]) {
 239                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 240                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 241         }
 242
 243         if (tb[NL80211_KEY_SEQ]) {
 244                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 245                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 246         }
 247
 248         if (tb[NL80211_KEY_CIPHER])
 249                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 250
 251         return 0;
 252 }
 253
 254 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 255 {
 256         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 257                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 258                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 259         }
 260
 261         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 262                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 263                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 264         }
 265
 266         if (info->attrs[NL80211_ATTR_KEY_IDX])
 267                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 268
 269         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 270                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 271
 272         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 273         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 274
 275         return 0;
 276 }
 277
 278 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 279 {
 280         int err;
 281
 282         memset(k, 0, sizeof(*k));
 283         k->idx = -1;
 284
 285         if (info->attrs[NL80211_ATTR_KEY])
 286                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 287         else
 288                 err = nl80211_parse_key_old(info, k);
 289
 290         if (err)
 291                 return err;
 292
 293         if (k->def && k->defmgmt)
 294                 return -EINVAL;
 295
 296         if (k->idx != -1) {
 297                 if (k->defmgmt) {
 298                         if (k->idx < 4 || k->idx > 5)
 299                                 return -EINVAL;
 300                 } else if (k->def) {
 301                         if (k->idx < 0 || k->idx > 3)
 302                                 return -EINVAL;
 303                 } else {
 304                         if (k->idx < 0 || k->idx > 5)
 305                                 return -EINVAL;
 306                 }
 307         }
 308
 309         return 0;
 310 }
 311
 312 static struct cfg80211_cached_keys *
 313 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 314                        struct nlattr *keys)
 315 {
 316         struct key_parse parse;
 317         struct nlattr *key;
 318         struct cfg80211_cached_keys *result;
 319         int rem, err, def = 0;
 320
 321         result = kzalloc(sizeof(*result), GFP_KERNEL);
 322         if (!result)
 323                 return ERR_PTR(-ENOMEM);
 324
 325         result->def = -1;
 326         result->defmgmt = -1;
 327
 328         nla_for_each_nested(key, keys, rem) {
 329                 memset(&parse, 0, sizeof(parse));
 330                 parse.idx = -1;
 331
 332                 err = nl80211_parse_key_new(key, &parse);
 333                 if (err)
 334                         goto error;
 335                 err = -EINVAL;
 336                 if (!parse.p.key)
 337                         goto error;
 338                 if (parse.idx < 0 || parse.idx > 4)
 339                         goto error;
 340                 if (parse.def) {
 341                         if (def)
 342                                 goto error;
 343                         def = 1;
 344                         result->def = parse.idx;
 345                 } else if (parse.defmgmt)
 346                         goto error;
 347                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 348                                                      parse.idx, NULL);
 349                 if (err)
 350                         goto error;
 351                 result->params[parse.idx].cipher = parse.p.cipher;
 352                 result->params[parse.idx].key_len = parse.p.key_len;
 353                 result->params[parse.idx].key = result->data[parse.idx];
 354                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 355         }
 356
 357         return result;
 358  error:
 359         kfree(result);
 360         return ERR_PTR(err);
 361 }
 362
 363 static int nl80211_key_allowed(struct wireless_dev *wdev)
 364 {
 365         ASSERT_WDEV_LOCK(wdev);
 366
 367         if (!netif_running(wdev->netdev))
 368                 return -ENETDOWN;
 369
 370         switch (wdev->iftype) {
 371         case NL80211_IFTYPE_AP:
 372         case NL80211_IFTYPE_AP_VLAN:
 373                 break;
 374         case NL80211_IFTYPE_ADHOC:
 375                 if (!wdev->current_bss)
 376                         return -ENOLINK;
 377                 break;
 378         case NL80211_IFTYPE_STATION:
 379                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 380                         return -ENOLINK;
 381                 break;
 382         default:
 383                 return -EINVAL;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 390                               struct cfg80211_registered_device *dev)
 391 {
 392         void *hdr;
 393         struct nlattr *nl_bands, *nl_band;
 394         struct nlattr *nl_freqs, *nl_freq;
 395         struct nlattr *nl_rates, *nl_rate;
 396         struct nlattr *nl_modes;
 397         struct nlattr *nl_cmds;
 398         enum ieee80211_band band;
 399         struct ieee80211_channel *chan;
 400         struct ieee80211_rate *rate;
 401         int i;
 402         u16 ifmodes = dev->wiphy.interface_modes;
 403
 404         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 405         if (!hdr)
 406                 return -1;
 407
 408         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 409         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 410
 411         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 412                     cfg80211_rdev_list_generation);
 413
 414         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 415                    dev->wiphy.retry_short);
 416         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 417                    dev->wiphy.retry_long);
 418         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 419                     dev->wiphy.frag_threshold);
 420         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 421                     dev->wiphy.rts_threshold);
 422
 423         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 424                    dev->wiphy.max_scan_ssids);
 425         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 426                     dev->wiphy.max_scan_ie_len);
 427
 428         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 429                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 430                 dev->wiphy.cipher_suites);
 431
 432         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 433         if (!nl_modes)
 434                 goto nla_put_failure;
 435
 436         i = 0;
 437         while (ifmodes) {
 438                 if (ifmodes & 1)
 439                         NLA_PUT_FLAG(msg, i);
 440                 ifmodes >>= 1;
 441                 i++;
 442         }
 443
 444         nla_nest_end(msg, nl_modes);
 445
 446         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 447         if (!nl_bands)
 448                 goto nla_put_failure;
 449
 450         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 451                 if (!dev->wiphy.bands[band])
 452                         continue;
 453
 454                 nl_band = nla_nest_start(msg, band);
 455                 if (!nl_band)
 456                         goto nla_put_failure;
 457
 458                 /* add HT info */
 459                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 460                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 461                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 462                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 463                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 464                                 dev->wiphy.bands[band]->ht_cap.cap);
 465                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 466                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 467                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 468                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 469                 }
 470
 471                 /* add frequencies */
 472                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 473                 if (!nl_freqs)
 474                         goto nla_put_failure;
 475
 476                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 477                         nl_freq = nla_nest_start(msg, i);
 478                         if (!nl_freq)
 479                                 goto nla_put_failure;
 480
 481                         chan = &dev->wiphy.bands[band]->channels[i];
 482
 483                         if (nl80211_msg_put_channel(msg, chan))
 484                                 goto nla_put_failure;
 485
 486                         nla_nest_end(msg, nl_freq);
 487                 }
 488
 489                 nla_nest_end(msg, nl_freqs);
 490
 491                 /* add bitrates */
 492                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 493                 if (!nl_rates)
 494                         goto nla_put_failure;
 495
 496                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 497                         nl_rate = nla_nest_start(msg, i);
 498                         if (!nl_rate)
 499                                 goto nla_put_failure;
 500
 501                         rate = &dev->wiphy.bands[band]->bitrates[i];
 502                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 503                                     rate->bitrate);
 504                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 505                                 NLA_PUT_FLAG(msg,
 506                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 507
 508                         nla_nest_end(msg, nl_rate);
 509                 }
 510
 511                 nla_nest_end(msg, nl_rates);
 512
 513                 nla_nest_end(msg, nl_band);
 514         }
 515         nla_nest_end(msg, nl_bands);
 516
 517         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 518         if (!nl_cmds)
 519                 goto nla_put_failure;
 520
 521         i = 0;
 522 #define CMD(op, n)                                              \
 523          do {                                                   \
 524                 if (dev->ops->op) {                             \
 525                         i++;                                    \
 526                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 527                 }                                               \
 528         } while (0)
 529
 530         CMD(add_virtual_intf, NEW_INTERFACE);
 531         CMD(change_virtual_intf, SET_INTERFACE);
 532         CMD(add_key, NEW_KEY);
 533         CMD(add_beacon, NEW_BEACON);
 534         CMD(add_station, NEW_STATION);
 535         CMD(add_mpath, NEW_MPATH);
 536         CMD(set_mesh_params, SET_MESH_PARAMS);
 537         CMD(change_bss, SET_BSS);
 538         CMD(auth, AUTHENTICATE);
 539         CMD(assoc, ASSOCIATE);
 540         CMD(deauth, DEAUTHENTICATE);
 541         CMD(disassoc, DISASSOCIATE);
 542         CMD(join_ibss, JOIN_IBSS);
 543         if (dev->wiphy.netnsok) {
 544                 i++;
 545                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 546         }
 547
 548 #undef CMD
 549
 550         if (dev->ops->connect || dev->ops->auth) {
 551                 i++;
 552                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 553         }
 554
 555         if (dev->ops->disconnect || dev->ops->deauth) {
 556                 i++;
 557                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 558         }
 559
 560         nla_nest_end(msg, nl_cmds);
 561
 562         return genlmsg_end(msg, hdr);
 563
 564  nla_put_failure:
 565         genlmsg_cancel(msg, hdr);
 566         return -EMSGSIZE;
 567 }
 568
 569 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 570 {
 571         int idx = 0;
 572         int start = cb->args[0];
 573         struct cfg80211_registered_device *dev;
 574
 575         mutex_lock(&cfg80211_mutex);
 576         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 577                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 578                         continue;
 579                 if (++idx <= start)
 580                         continue;
 581                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 582                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 583                                        dev) < 0) {
 584                         idx--;
 585                         break;
 586                 }
 587         }
 588         mutex_unlock(&cfg80211_mutex);
 589
 590         cb->args[0] = idx;
 591
 592         return skb->len;
 593 }
 594
 595 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 596 {
 597         struct sk_buff *msg;
 598         struct cfg80211_registered_device *dev;
 599
 600         dev = cfg80211_get_dev_from_info(info);
 601         if (IS_ERR(dev))
 602                 return PTR_ERR(dev);
 603
 604         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 605         if (!msg)
 606                 goto out_err;
 607
 608         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 609                 goto out_free;
 610
 611         cfg80211_unlock_rdev(dev);
 612
 613         return genlmsg_reply(msg, info);
 614
 615  out_free:
 616         nlmsg_free(msg);
 617  out_err:
 618         cfg80211_unlock_rdev(dev);
 619         return -ENOBUFS;
 620 }
 621
 622 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 623         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 624         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 625         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 626         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 627         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 628 };
 629
 630 static int parse_txq_params(struct nlattr *tb[],
 631                             struct ieee80211_txq_params *txq_params)
 632 {
 633         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 634             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 635             !tb[NL80211_TXQ_ATTR_AIFS])
 636                 return -EINVAL;
 637
 638         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 639         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 640         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 641         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 642         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 643
 644         return 0;
 645 }
 646
 647 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 648 {
 649         struct cfg80211_registered_device *rdev;
 650         int result = 0, rem_txq_params = 0;
 651         struct nlattr *nl_txq_params;
 652         u32 changed;
 653         u8 retry_short = 0, retry_long = 0;
 654         u32 frag_threshold = 0, rts_threshold = 0;
 655
 656         rtnl_lock();
 657
 658         mutex_lock(&cfg80211_mutex);
 659
 660         rdev = __cfg80211_rdev_from_info(info);
 661         if (IS_ERR(rdev)) {
 662                 mutex_unlock(&cfg80211_mutex);
 663                 result = PTR_ERR(rdev);
 664                 goto unlock;
 665         }
 666
 667         mutex_lock(&rdev->mtx);
 668
 669         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 670                 result = cfg80211_dev_rename(
 671                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 672
 673         mutex_unlock(&cfg80211_mutex);
 674
 675         if (result)
 676                 goto bad_res;
 677
 678         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 679                 struct ieee80211_txq_params txq_params;
 680                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 681
 682                 if (!rdev->ops->set_txq_params) {
 683                         result = -EOPNOTSUPP;
 684                         goto bad_res;
 685                 }
 686
 687                 nla_for_each_nested(nl_txq_params,
 688                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 689                                     rem_txq_params) {
 690                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 691                                   nla_data(nl_txq_params),
 692                                   nla_len(nl_txq_params),
 693                                   txq_params_policy);
 694                         result = parse_txq_params(tb, &txq_params);
 695                         if (result)
 696                                 goto bad_res;
 697
 698                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 699                                                            &txq_params);
 700                         if (result)
 701                                 goto bad_res;
 702                 }
 703         }
 704
 705         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 706                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 707                 u32 freq;
 708
 709                 result = -EINVAL;
 710
 711                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 712                         channel_type = nla_get_u32(info->attrs[
 713                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 714                         if (channel_type != NL80211_CHAN_NO_HT &&
 715                             channel_type != NL80211_CHAN_HT20 &&
 716                             channel_type != NL80211_CHAN_HT40PLUS &&
 717                             channel_type != NL80211_CHAN_HT40MINUS)
 718                                 goto bad_res;
 719                 }
 720
 721                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 722
 723                 mutex_lock(&rdev->devlist_mtx);
 724                 result = rdev_set_freq(rdev, NULL, freq, channel_type);
 725                 mutex_unlock(&rdev->devlist_mtx);
 726                 if (result)
 727                         goto bad_res;
 728         }
 729
 730         changed = 0;
 731
 732         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 733                 retry_short = nla_get_u8(
 734                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 735                 if (retry_short == 0) {
 736                         result = -EINVAL;
 737                         goto bad_res;
 738                 }
 739                 changed |= WIPHY_PARAM_RETRY_SHORT;
 740         }
 741
 742         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 743                 retry_long = nla_get_u8(
 744                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 745                 if (retry_long == 0) {
 746                         result = -EINVAL;
 747                         goto bad_res;
 748                 }
 749                 changed |= WIPHY_PARAM_RETRY_LONG;
 750         }
 751
 752         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 753                 frag_threshold = nla_get_u32(
 754                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 755                 if (frag_threshold < 256) {
 756                         result = -EINVAL;
 757                         goto bad_res;
 758                 }
 759                 if (frag_threshold != (u32) -1) {
 760                         /*
 761                          * Fragments (apart from the last one) are required to
 762                          * have even length. Make the fragmentation code
 763                          * simpler by stripping LSB should someone try to use
 764                          * odd threshold value.
 765                          */
 766                         frag_threshold &= ~0x1;
 767                 }
 768                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 769         }
 770
 771         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 772                 rts_threshold = nla_get_u32(
 773                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 774                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 775         }
 776
 777         if (changed) {
 778                 u8 old_retry_short, old_retry_long;
 779                 u32 old_frag_threshold, old_rts_threshold;
 780
 781                 if (!rdev->ops->set_wiphy_params) {
 782                         result = -EOPNOTSUPP;
 783                         goto bad_res;
 784                 }
 785
 786                 old_retry_short = rdev->wiphy.retry_short;
 787                 old_retry_long = rdev->wiphy.retry_long;
 788                 old_frag_threshold = rdev->wiphy.frag_threshold;
 789                 old_rts_threshold = rdev->wiphy.rts_threshold;
 790
 791                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 792                         rdev->wiphy.retry_short = retry_short;
 793                 if (changed & WIPHY_PARAM_RETRY_LONG)
 794                         rdev->wiphy.retry_long = retry_long;
 795                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 796                         rdev->wiphy.frag_threshold = frag_threshold;
 797                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 798                         rdev->wiphy.rts_threshold = rts_threshold;
 799
 800                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 801                 if (result) {
 802                         rdev->wiphy.retry_short = old_retry_short;
 803                         rdev->wiphy.retry_long = old_retry_long;
 804                         rdev->wiphy.frag_threshold = old_frag_threshold;
 805                         rdev->wiphy.rts_threshold = old_rts_threshold;
 806                 }
 807         }
 808
 809  bad_res:
 810         mutex_unlock(&rdev->mtx);
 811  unlock:
 812         rtnl_unlock();
 813         return result;
 814 }
 815
 816
 817 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 818                               struct cfg80211_registered_device *rdev,
 819                               struct net_device *dev)
 820 {
 821         void *hdr;
 822
 823         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 824         if (!hdr)
 825                 return -1;
 826
 827         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 828         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 829         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 830         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 831
 832         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 833                     rdev->devlist_generation ^
 834                         (cfg80211_rdev_list_generation << 2));
 835
 836         return genlmsg_end(msg, hdr);
 837
 838  nla_put_failure:
 839         genlmsg_cancel(msg, hdr);
 840         return -EMSGSIZE;
 841 }
 842
 843 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 844 {
 845         int wp_idx = 0;
 846         int if_idx = 0;
 847         int wp_start = cb->args[0];
 848         int if_start = cb->args[1];
 849         struct cfg80211_registered_device *rdev;
 850         struct wireless_dev *wdev;
 851
 852         mutex_lock(&cfg80211_mutex);
 853         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 854                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
 855                         continue;
 856                 if (wp_idx < wp_start) {
 857                         wp_idx++;
 858                         continue;
 859                 }
 860                 if_idx = 0;
 861
 862                 mutex_lock(&rdev->devlist_mtx);
 863                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
 864                         if (if_idx < if_start) {
 865                                 if_idx++;
 866                                 continue;
 867                         }
 868                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 869                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 870                                                rdev, wdev->netdev) < 0) {
 871                                 mutex_unlock(&rdev->devlist_mtx);
 872                                 goto out;
 873                         }
 874                         if_idx++;
 875                 }
 876                 mutex_unlock(&rdev->devlist_mtx);
 877
 878                 wp_idx++;
 879         }
 880  out:
 881         mutex_unlock(&cfg80211_mutex);
 882
 883         cb->args[0] = wp_idx;
 884         cb->args[1] = if_idx;
 885
 886         return skb->len;
 887 }
 888
 889 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 890 {
 891         struct sk_buff *msg;
 892         struct cfg80211_registered_device *dev;
 893         struct net_device *netdev;
 894         int err;
 895
 896         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
 897         if (err)
 898                 return err;
 899
 900         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 901         if (!msg)
 902                 goto out_err;
 903
 904         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
 905                                dev, netdev) < 0)
 906                 goto out_free;
 907
 908         dev_put(netdev);
 909         cfg80211_unlock_rdev(dev);
 910
 911         return genlmsg_reply(msg, info);
 912
 913  out_free:
 914         nlmsg_free(msg);
 915  out_err:
 916         dev_put(netdev);
 917         cfg80211_unlock_rdev(dev);
 918         return -ENOBUFS;
 919 }
 920
 921 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 922         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 923         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 924         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 925         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 926         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 927 };
 928
 929 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 930 {
 931         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 932         int flag;
 933
 934         *mntrflags = 0;
 935
 936         if (!nla)
 937                 return -EINVAL;
 938
 939         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 940                              nla, mntr_flags_policy))
 941                 return -EINVAL;
 942
 943         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 944                 if (flags[flag])
 945                         *mntrflags |= (1<<flag);
 946
 947         return 0;
 948 }
 949
 950 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 951 {
 952         struct cfg80211_registered_device *rdev;
 953         struct vif_params params;
 954         int err;
 955         enum nl80211_iftype otype, ntype;
 956         struct net_device *dev;
 957         u32 _flags, *flags = NULL;
 958         bool change = false;
 959
 960         memset(&params, 0, sizeof(params));
 961
 962         rtnl_lock();
 963
 964         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
 965         if (err)
 966                 goto unlock_rtnl;
 967
 968         otype = ntype = dev->ieee80211_ptr->iftype;
 969
 970         if (info->attrs[NL80211_ATTR_IFTYPE]) {
 971                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
 972                 if (otype != ntype)
 973                         change = true;
 974                 if (ntype > NL80211_IFTYPE_MAX) {
 975                         err = -EINVAL;
 976                         goto unlock;
 977                 }
 978         }
 979
 980         if (info->attrs[NL80211_ATTR_MESH_ID]) {
 981                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
 982                         err = -EINVAL;
 983                         goto unlock;
 984                 }
 985                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
 986                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
 987                 change = true;
 988         }
 989
 990         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
 991                 if (ntype != NL80211_IFTYPE_MONITOR) {
 992                         err = -EINVAL;
 993                         goto unlock;
 994                 }
 995                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
 996                                           &_flags);
 997                 if (err)
 998                         goto unlock;
 999
1000                 flags = &_flags;
1001                 change = true;
1002         }
1003
1004         if (change)
1005                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1006         else
1007                 err = 0;
1008
1009  unlock:
1010         dev_put(dev);
1011         cfg80211_unlock_rdev(rdev);
1012  unlock_rtnl:
1013         rtnl_unlock();
1014         return err;
1015 }
1016
1017 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1018 {
1019         struct cfg80211_registered_device *rdev;
1020         struct vif_params params;
1021         int err;
1022         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1023         u32 flags;
1024
1025         memset(&params, 0, sizeof(params));
1026
1027         if (!info->attrs[NL80211_ATTR_IFNAME])
1028                 return -EINVAL;
1029
1030         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1031                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1032                 if (type > NL80211_IFTYPE_MAX)
1033                         return -EINVAL;
1034         }
1035
1036         rtnl_lock();
1037
1038         rdev = cfg80211_get_dev_from_info(info);
1039         if (IS_ERR(rdev)) {
1040                 err = PTR_ERR(rdev);
1041                 goto unlock_rtnl;
1042         }
1043
1044         if (!rdev->ops->add_virtual_intf ||
1045             !(rdev->wiphy.interface_modes & (1 << type))) {
1046                 err = -EOPNOTSUPP;
1047                 goto unlock;
1048         }
1049
1050         if (type == NL80211_IFTYPE_MESH_POINT &&
1051             info->attrs[NL80211_ATTR_MESH_ID]) {
1052                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1053                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1054         }
1055
1056         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1057                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1058                                   &flags);
1059         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1060                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1061                 type, err ? NULL : &flags, &params);
1062
1063  unlock:
1064         cfg80211_unlock_rdev(rdev);
1065  unlock_rtnl:
1066         rtnl_unlock();
1067         return err;
1068 }
1069
1070 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1071 {
1072         struct cfg80211_registered_device *rdev;
1073         int err;
1074         struct net_device *dev;
1075
1076         rtnl_lock();
1077
1078         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1079         if (err)
1080                 goto unlock_rtnl;
1081
1082         if (!rdev->ops->del_virtual_intf) {
1083                 err = -EOPNOTSUPP;
1084                 goto out;
1085         }
1086
1087         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1088
1089  out:
1090         cfg80211_unlock_rdev(rdev);
1091         dev_put(dev);
1092  unlock_rtnl:
1093         rtnl_unlock();
1094         return err;
1095 }
1096
1097 struct get_key_cookie {
1098         struct sk_buff *msg;
1099         int error;
1100         int idx;
1101 };
1102
1103 static void get_key_callback(void *c, struct key_params *params)
1104 {
1105         struct nlattr *key;
1106         struct get_key_cookie *cookie = c;
1107
1108         if (params->key)
1109                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1110                         params->key_len, params->key);
1111
1112         if (params->seq)
1113                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1114                         params->seq_len, params->seq);
1115
1116         if (params->cipher)
1117                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1118                             params->cipher);
1119
1120         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1121         if (!key)
1122                 goto nla_put_failure;
1123
1124         if (params->key)
1125                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1126                         params->key_len, params->key);
1127
1128         if (params->seq)
1129                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1130                         params->seq_len, params->seq);
1131
1132         if (params->cipher)
1133                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1134                             params->cipher);
1135
1136         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1137
1138         nla_nest_end(cookie->msg, key);
1139
1140         return;
1141  nla_put_failure:
1142         cookie->error = 1;
1143 }
1144
1145 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1146 {
1147         struct cfg80211_registered_device *rdev;
1148         int err;
1149         struct net_device *dev;
1150         u8 key_idx = 0;
1151         u8 *mac_addr = NULL;
1152         struct get_key_cookie cookie = {
1153                 .error = 0,
1154         };
1155         void *hdr;
1156         struct sk_buff *msg;
1157
1158         if (info->attrs[NL80211_ATTR_KEY_IDX])
1159                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1160
1161         if (key_idx > 5)
1162                 return -EINVAL;
1163
1164         if (info->attrs[NL80211_ATTR_MAC])
1165                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1166
1167         rtnl_lock();
1168
1169         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1170         if (err)
1171                 goto unlock_rtnl;
1172
1173         if (!rdev->ops->get_key) {
1174                 err = -EOPNOTSUPP;
1175                 goto out;
1176         }
1177
1178         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1179         if (!msg) {
1180                 err = -ENOMEM;
1181                 goto out;
1182         }
1183
1184         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1185                              NL80211_CMD_NEW_KEY);
1186
1187         if (IS_ERR(hdr)) {
1188                 err = PTR_ERR(hdr);
1189                 goto free_msg;
1190         }
1191
1192         cookie.msg = msg;
1193         cookie.idx = key_idx;
1194
1195         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1196         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1197         if (mac_addr)
1198                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1199
1200         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1201                                 &cookie, get_key_callback);
1202
1203         if (err)
1204                 goto free_msg;
1205
1206         if (cookie.error)
1207                 goto nla_put_failure;
1208
1209         genlmsg_end(msg, hdr);
1210         err = genlmsg_reply(msg, info);
1211         goto out;
1212
1213  nla_put_failure:
1214         err = -ENOBUFS;
1215  free_msg:
1216         nlmsg_free(msg);
1217  out:
1218         cfg80211_unlock_rdev(rdev);
1219         dev_put(dev);
1220  unlock_rtnl:
1221         rtnl_unlock();
1222
1223         return err;
1224 }
1225
1226 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1227 {
1228         struct cfg80211_registered_device *rdev;
1229         struct key_parse key;
1230         int err;
1231         struct net_device *dev;
1232         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1233                     u8 key_index);
1234
1235         err = nl80211_parse_key(info, &key);
1236         if (err)
1237                 return err;
1238
1239         if (key.idx < 0)
1240                 return -EINVAL;
1241
1242         /* only support setting default key */
1243         if (!key.def && !key.defmgmt)
1244                 return -EINVAL;
1245
1246         rtnl_lock();
1247
1248         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1249         if (err)
1250                 goto unlock_rtnl;
1251
1252         if (key.def)
1253                 func = rdev->ops->set_default_key;
1254         else
1255                 func = rdev->ops->set_default_mgmt_key;
1256
1257         if (!func) {
1258                 err = -EOPNOTSUPP;
1259                 goto out;
1260         }
1261
1262         wdev_lock(dev->ieee80211_ptr);
1263         err = nl80211_key_allowed(dev->ieee80211_ptr);
1264         if (!err)
1265                 err = func(&rdev->wiphy, dev, key.idx);
1266
1267 #ifdef CONFIG_WIRELESS_EXT
1268         if (!err) {
1269                 if (func == rdev->ops->set_default_key)
1270                         dev->ieee80211_ptr->wext.default_key = key.idx;
1271                 else
1272                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1273         }
1274 #endif
1275         wdev_unlock(dev->ieee80211_ptr);
1276
1277  out:
1278         cfg80211_unlock_rdev(rdev);
1279         dev_put(dev);
1280
1281  unlock_rtnl:
1282         rtnl_unlock();
1283
1284         return err;
1285 }
1286
1287 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1288 {
1289         struct cfg80211_registered_device *rdev;
1290         int err;
1291         struct net_device *dev;
1292         struct key_parse key;
1293         u8 *mac_addr = NULL;
1294
1295         err = nl80211_parse_key(info, &key);
1296         if (err)
1297                 return err;
1298
1299         if (!key.p.key)
1300                 return -EINVAL;
1301
1302         if (info->attrs[NL80211_ATTR_MAC])
1303                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1304
1305         rtnl_lock();
1306
1307         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1308         if (err)
1309                 goto unlock_rtnl;
1310
1311         if (!rdev->ops->add_key) {
1312                 err = -EOPNOTSUPP;
1313                 goto out;
1314         }
1315
1316         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1317                 err = -EINVAL;
1318                 goto out;
1319         }
1320
1321         wdev_lock(dev->ieee80211_ptr);
1322         err = nl80211_key_allowed(dev->ieee80211_ptr);
1323         if (!err)
1324                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1325                                          mac_addr, &key.p);
1326         wdev_unlock(dev->ieee80211_ptr);
1327
1328  out:
1329         cfg80211_unlock_rdev(rdev);
1330         dev_put(dev);
1331  unlock_rtnl:
1332         rtnl_unlock();
1333
1334         return err;
1335 }
1336
1337 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1338 {
1339         struct cfg80211_registered_device *rdev;
1340         int err;
1341         struct net_device *dev;
1342         u8 *mac_addr = NULL;
1343         struct key_parse key;
1344
1345         err = nl80211_parse_key(info, &key);
1346         if (err)
1347                 return err;
1348
1349         if (info->attrs[NL80211_ATTR_MAC])
1350                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1351
1352         rtnl_lock();
1353
1354         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1355         if (err)
1356                 goto unlock_rtnl;
1357
1358         if (!rdev->ops->del_key) {
1359                 err = -EOPNOTSUPP;
1360                 goto out;
1361         }
1362
1363         wdev_lock(dev->ieee80211_ptr);
1364         err = nl80211_key_allowed(dev->ieee80211_ptr);
1365         if (!err)
1366                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1367
1368 #ifdef CONFIG_WIRELESS_EXT
1369         if (!err) {
1370                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1371                         dev->ieee80211_ptr->wext.default_key = -1;
1372                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1373                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1374         }
1375 #endif
1376         wdev_unlock(dev->ieee80211_ptr);
1377
1378  out:
1379         cfg80211_unlock_rdev(rdev);
1380         dev_put(dev);
1381
1382  unlock_rtnl:
1383         rtnl_unlock();
1384
1385         return err;
1386 }
1387
1388 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1389 {
1390         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1391                     struct beacon_parameters *info);
1392         struct cfg80211_registered_device *rdev;
1393         int err;
1394         struct net_device *dev;
1395         struct beacon_parameters params;
1396         int haveinfo = 0;
1397
1398         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1399                 return -EINVAL;
1400
1401         rtnl_lock();
1402
1403         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1404         if (err)
1405                 goto unlock_rtnl;
1406
1407         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1408                 err = -EOPNOTSUPP;
1409                 goto out;
1410         }
1411
1412         switch (info->genlhdr->cmd) {
1413         case NL80211_CMD_NEW_BEACON:
1414                 /* these are required for NEW_BEACON */
1415                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1416                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1417                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1418                         err = -EINVAL;
1419                         goto out;
1420                 }
1421
1422                 call = rdev->ops->add_beacon;
1423                 break;
1424         case NL80211_CMD_SET_BEACON:
1425                 call = rdev->ops->set_beacon;
1426                 break;
1427         default:
1428                 WARN_ON(1);
1429                 err = -EOPNOTSUPP;
1430                 goto out;
1431         }
1432
1433         if (!call) {
1434                 err = -EOPNOTSUPP;
1435                 goto out;
1436         }
1437
1438         memset(&params, 0, sizeof(params));
1439
1440         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1441                 params.interval =
1442                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1443                 haveinfo = 1;
1444         }
1445
1446         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1447                 params.dtim_period =
1448                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1449                 haveinfo = 1;
1450         }
1451
1452         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1453                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1454                 params.head_len =
1455                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1456                 haveinfo = 1;
1457         }
1458
1459         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1460                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1461                 params.tail_len =
1462                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1463                 haveinfo = 1;
1464         }
1465
1466         if (!haveinfo) {
1467                 err = -EINVAL;
1468                 goto out;
1469         }
1470
1471         err = call(&rdev->wiphy, dev, &params);
1472
1473  out:
1474         cfg80211_unlock_rdev(rdev);
1475         dev_put(dev);
1476  unlock_rtnl:
1477         rtnl_unlock();
1478
1479         return err;
1480 }
1481
1482 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1483 {
1484         struct cfg80211_registered_device *rdev;
1485         int err;
1486         struct net_device *dev;
1487
1488         rtnl_lock();
1489
1490         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1491         if (err)
1492                 goto unlock_rtnl;
1493
1494         if (!rdev->ops->del_beacon) {
1495                 err = -EOPNOTSUPP;
1496                 goto out;
1497         }
1498
1499         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1500                 err = -EOPNOTSUPP;
1501                 goto out;
1502         }
1503         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1504
1505  out:
1506         cfg80211_unlock_rdev(rdev);
1507         dev_put(dev);
1508  unlock_rtnl:
1509         rtnl_unlock();
1510
1511         return err;
1512 }
1513
1514 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1515         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1516         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1517         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1518         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1519 };
1520
1521 static int parse_station_flags(struct genl_info *info,
1522                                struct station_parameters *params)
1523 {
1524         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1525         struct nlattr *nla;
1526         int flag;
1527
1528         /*
1529          * Try parsing the new attribute first so userspace
1530          * can specify both for older kernels.
1531          */
1532         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1533         if (nla) {
1534                 struct nl80211_sta_flag_update *sta_flags;
1535
1536                 sta_flags = nla_data(nla);
1537                 params->sta_flags_mask = sta_flags->mask;
1538                 params->sta_flags_set = sta_flags->set;
1539                 if ((params->sta_flags_mask |
1540                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1541                         return -EINVAL;
1542                 return 0;
1543         }
1544
1545         /* if present, parse the old attribute */
1546
1547         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1548         if (!nla)
1549                 return 0;
1550
1551         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1552                              nla, sta_flags_policy))
1553                 return -EINVAL;
1554
1555         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1556         params->sta_flags_mask &= ~1;
1557
1558         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1559                 if (flags[flag])
1560                         params->sta_flags_set |= (1<<flag);
1561
1562         return 0;
1563 }
1564
1565 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1566                                 int flags, struct net_device *dev,
1567                                 u8 *mac_addr, struct station_info *sinfo)
1568 {
1569         void *hdr;
1570         struct nlattr *sinfoattr, *txrate;
1571         u16 bitrate;
1572
1573         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1574         if (!hdr)
1575                 return -1;
1576
1577         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1578         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1579
1580         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1581
1582         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1583         if (!sinfoattr)
1584                 goto nla_put_failure;
1585         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1586                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1587                             sinfo->inactive_time);
1588         if (sinfo->filled & STATION_INFO_RX_BYTES)
1589                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1590                             sinfo->rx_bytes);
1591         if (sinfo->filled & STATION_INFO_TX_BYTES)
1592                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1593                             sinfo->tx_bytes);
1594         if (sinfo->filled & STATION_INFO_LLID)
1595                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1596                             sinfo->llid);
1597         if (sinfo->filled & STATION_INFO_PLID)
1598                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1599                             sinfo->plid);
1600         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1601                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1602                             sinfo->plink_state);
1603         if (sinfo->filled & STATION_INFO_SIGNAL)
1604                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1605                            sinfo->signal);
1606         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1607                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1608                 if (!txrate)
1609                         goto nla_put_failure;
1610
1611                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1612                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1613                 if (bitrate > 0)
1614                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1615
1616                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1617                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1618                                     sinfo->txrate.mcs);
1619                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1620                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1621                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1622                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1623
1624                 nla_nest_end(msg, txrate);
1625         }
1626         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1627                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1628                             sinfo->rx_packets);
1629         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1630                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1631                             sinfo->tx_packets);
1632         nla_nest_end(msg, sinfoattr);
1633
1634         return genlmsg_end(msg, hdr);
1635
1636  nla_put_failure:
1637         genlmsg_cancel(msg, hdr);
1638         return -EMSGSIZE;
1639 }
1640
1641 static int nl80211_dump_station(struct sk_buff *skb,
1642                                 struct netlink_callback *cb)
1643 {
1644         struct station_info sinfo;
1645         struct cfg80211_registered_device *dev;
1646         struct net_device *netdev;
1647         u8 mac_addr[ETH_ALEN];
1648         int ifidx = cb->args[0];
1649         int sta_idx = cb->args[1];
1650         int err;
1651
1652         if (!ifidx) {
1653                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1654                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1655                                   nl80211_policy);
1656                 if (err)
1657                         return err;
1658
1659                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1660                         return -EINVAL;
1661
1662                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1663                 if (!ifidx)
1664                         return -EINVAL;
1665         }
1666
1667         rtnl_lock();
1668
1669         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1670         if (!netdev) {
1671                 err = -ENODEV;
1672                 goto out_rtnl;
1673         }
1674
1675         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1676         if (IS_ERR(dev)) {
1677                 err = PTR_ERR(dev);
1678                 goto out_rtnl;
1679         }
1680
1681         if (!dev->ops->dump_station) {
1682                 err = -EOPNOTSUPP;
1683                 goto out_err;
1684         }
1685
1686         while (1) {
1687                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1688                                              mac_addr, &sinfo);
1689                 if (err == -ENOENT)
1690                         break;
1691                 if (err)
1692                         goto out_err;
1693
1694                 if (nl80211_send_station(skb,
1695                                 NETLINK_CB(cb->skb).pid,
1696                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1697                                 netdev, mac_addr,
1698                                 &sinfo) < 0)
1699                         goto out;
1700
1701                 sta_idx++;
1702         }
1703
1704
1705  out:
1706         cb->args[1] = sta_idx;
1707         err = skb->len;
1708  out_err:
1709         cfg80211_unlock_rdev(dev);
1710  out_rtnl:
1711         rtnl_unlock();
1712
1713         return err;
1714 }
1715
1716 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1717 {
1718         struct cfg80211_registered_device *rdev;
1719         int err;
1720         struct net_device *dev;
1721         struct station_info sinfo;
1722         struct sk_buff *msg;
1723         u8 *mac_addr = NULL;
1724
1725         memset(&sinfo, 0, sizeof(sinfo));
1726
1727         if (!info->attrs[NL80211_ATTR_MAC])
1728                 return -EINVAL;
1729
1730         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1731
1732         rtnl_lock();
1733
1734         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1735         if (err)
1736                 goto out_rtnl;
1737
1738         if (!rdev->ops->get_station) {
1739                 err = -EOPNOTSUPP;
1740                 goto out;
1741         }
1742
1743         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1744         if (err)
1745                 goto out;
1746
1747         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1748         if (!msg)
1749                 goto out;
1750
1751         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1752                                  dev, mac_addr, &sinfo) < 0)
1753                 goto out_free;
1754
1755         err = genlmsg_reply(msg, info);
1756         goto out;
1757
1758  out_free:
1759         nlmsg_free(msg);
1760  out:
1761         cfg80211_unlock_rdev(rdev);
1762         dev_put(dev);
1763  out_rtnl:
1764         rtnl_unlock();
1765
1766         return err;
1767 }
1768
1769 /*
1770  * Get vlan interface making sure it is on the right wiphy.
1771  */
1772 static int get_vlan(struct genl_info *info,
1773                     struct cfg80211_registered_device *rdev,
1774                     struct net_device **vlan)
1775 {
1776         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1777         *vlan = NULL;
1778
1779         if (vlanattr) {
1780                 *vlan = dev_get_by_index(genl_info_net(info),
1781                                          nla_get_u32(vlanattr));
1782                 if (!*vlan)
1783                         return -ENODEV;
1784                 if (!(*vlan)->ieee80211_ptr)
1785                         return -EINVAL;
1786                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1787                         return -EINVAL;
1788         }
1789         return 0;
1790 }
1791
1792 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1793 {
1794         struct cfg80211_registered_device *rdev;
1795         int err;
1796         struct net_device *dev;
1797         struct station_parameters params;
1798         u8 *mac_addr = NULL;
1799
1800         memset(&params, 0, sizeof(params));
1801
1802         params.listen_interval = -1;
1803
1804         if (info->attrs[NL80211_ATTR_STA_AID])
1805                 return -EINVAL;
1806
1807         if (!info->attrs[NL80211_ATTR_MAC])
1808                 return -EINVAL;
1809
1810         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1811
1812         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1813                 params.supported_rates =
1814                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1815                 params.supported_rates_len =
1816                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1817         }
1818
1819         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1820                 params.listen_interval =
1821                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1822
1823         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1824                 params.ht_capa =
1825                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1826
1827         if (parse_station_flags(info, &params))
1828                 return -EINVAL;
1829
1830         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1831                 params.plink_action =
1832                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1833
1834         rtnl_lock();
1835
1836         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1837         if (err)
1838                 goto out_rtnl;
1839
1840         err = get_vlan(info, rdev, &params.vlan);
1841         if (err)
1842                 goto out;
1843
1844         /* validate settings */
1845         err = 0;
1846
1847         switch (dev->ieee80211_ptr->iftype) {
1848         case NL80211_IFTYPE_AP:
1849         case NL80211_IFTYPE_AP_VLAN:
1850                 /* disallow mesh-specific things */
1851                 if (params.plink_action)
1852                         err = -EINVAL;
1853                 break;
1854         case NL80211_IFTYPE_STATION:
1855                 /* disallow everything but AUTHORIZED flag */
1856                 if (params.plink_action)
1857                         err = -EINVAL;
1858                 if (params.vlan)
1859                         err = -EINVAL;
1860                 if (params.supported_rates)
1861                         err = -EINVAL;
1862                 if (params.ht_capa)
1863                         err = -EINVAL;
1864                 if (params.listen_interval >= 0)
1865                         err = -EINVAL;
1866                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1867                         err = -EINVAL;
1868                 break;
1869         case NL80211_IFTYPE_MESH_POINT:
1870                 /* disallow things mesh doesn't support */
1871                 if (params.vlan)
1872                         err = -EINVAL;
1873                 if (params.ht_capa)
1874                         err = -EINVAL;
1875                 if (params.listen_interval >= 0)
1876                         err = -EINVAL;
1877                 if (params.supported_rates)
1878                         err = -EINVAL;
1879                 if (params.sta_flags_mask)
1880                         err = -EINVAL;
1881                 break;
1882         default:
1883                 err = -EINVAL;
1884         }
1885
1886         if (err)
1887                 goto out;
1888
1889         if (!rdev->ops->change_station) {
1890                 err = -EOPNOTSUPP;
1891                 goto out;
1892         }
1893
1894         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1895
1896  out:
1897         if (params.vlan)
1898                 dev_put(params.vlan);
1899         cfg80211_unlock_rdev(rdev);
1900         dev_put(dev);
1901  out_rtnl:
1902         rtnl_unlock();
1903
1904         return err;
1905 }
1906
1907 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1908 {
1909         struct cfg80211_registered_device *rdev;
1910         int err;
1911         struct net_device *dev;
1912         struct station_parameters params;
1913         u8 *mac_addr = NULL;
1914
1915         memset(&params, 0, sizeof(params));
1916
1917         if (!info->attrs[NL80211_ATTR_MAC])
1918                 return -EINVAL;
1919
1920         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1921                 return -EINVAL;
1922
1923         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1924                 return -EINVAL;
1925
1926         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1927         params.supported_rates =
1928                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1929         params.supported_rates_len =
1930                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1931         params.listen_interval =
1932                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1933
1934         if (info->attrs[NL80211_ATTR_STA_AID]) {
1935                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1936                 if (!params.aid || params.aid > IEEE80211_MAX_AID)
1937                         return -EINVAL;
1938         }
1939
1940         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1941                 params.ht_capa =
1942                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1943
1944         if (parse_station_flags(info, &params))
1945                 return -EINVAL;
1946
1947         rtnl_lock();
1948
1949         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1950         if (err)
1951                 goto out_rtnl;
1952
1953         err = get_vlan(info, rdev, &params.vlan);
1954         if (err)
1955                 goto out;
1956
1957         /* validate settings */
1958         err = 0;
1959
1960         switch (dev->ieee80211_ptr->iftype) {
1961         case NL80211_IFTYPE_AP:
1962         case NL80211_IFTYPE_AP_VLAN:
1963                 /* all ok but must have AID */
1964                 if (!params.aid)
1965                         err = -EINVAL;
1966                 break;
1967         case NL80211_IFTYPE_MESH_POINT:
1968                 /* disallow things mesh doesn't support */
1969                 if (params.vlan)
1970                         err = -EINVAL;
1971                 if (params.aid)
1972                         err = -EINVAL;
1973                 if (params.ht_capa)
1974                         err = -EINVAL;
1975                 if (params.listen_interval >= 0)
1976                         err = -EINVAL;
1977                 if (params.supported_rates)
1978                         err = -EINVAL;
1979                 if (params.sta_flags_mask)
1980                         err = -EINVAL;
1981                 break;
1982         default:
1983                 err = -EINVAL;
1984         }
1985
1986         if (err)
1987                 goto out;
1988
1989         if (!rdev->ops->add_station) {
1990                 err = -EOPNOTSUPP;
1991                 goto out;
1992         }
1993
1994         if (!netif_running(dev)) {
1995                 err = -ENETDOWN;
1996                 goto out;
1997         }
1998
1999         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2000
2001  out:
2002         if (params.vlan)
2003                 dev_put(params.vlan);
2004         cfg80211_unlock_rdev(rdev);
2005         dev_put(dev);
2006  out_rtnl:
2007         rtnl_unlock();
2008
2009         return err;
2010 }
2011
2012 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2013 {
2014         struct cfg80211_registered_device *rdev;
2015         int err;
2016         struct net_device *dev;
2017         u8 *mac_addr = NULL;
2018
2019         if (info->attrs[NL80211_ATTR_MAC])
2020                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2021
2022         rtnl_lock();
2023
2024         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2025         if (err)
2026                 goto out_rtnl;
2027
2028         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2029             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2030             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2031                 err = -EINVAL;
2032                 goto out;
2033         }
2034
2035         if (!rdev->ops->del_station) {
2036                 err = -EOPNOTSUPP;
2037                 goto out;
2038         }
2039
2040         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2041
2042  out:
2043         cfg80211_unlock_rdev(rdev);
2044         dev_put(dev);
2045  out_rtnl:
2046         rtnl_unlock();
2047
2048         return err;
2049 }
2050
2051 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2052                                 int flags, struct net_device *dev,
2053                                 u8 *dst, u8 *next_hop,
2054                                 struct mpath_info *pinfo)
2055 {
2056         void *hdr;
2057         struct nlattr *pinfoattr;
2058
2059         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2060         if (!hdr)
2061                 return -1;
2062
2063         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2064         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2065         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2066
2067         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2068
2069         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2070         if (!pinfoattr)
2071                 goto nla_put_failure;
2072         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2073                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2074                             pinfo->frame_qlen);
2075         if (pinfo->filled & MPATH_INFO_DSN)
2076                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
2077                             pinfo->dsn);
2078         if (pinfo->filled & MPATH_INFO_METRIC)
2079                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2080                             pinfo->metric);
2081         if (pinfo->filled & MPATH_INFO_EXPTIME)
2082                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2083                             pinfo->exptime);
2084         if (pinfo->filled & MPATH_INFO_FLAGS)
2085                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2086                             pinfo->flags);
2087         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2088                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2089                             pinfo->discovery_timeout);
2090         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2091                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2092                             pinfo->discovery_retries);
2093
2094         nla_nest_end(msg, pinfoattr);
2095
2096         return genlmsg_end(msg, hdr);
2097
2098  nla_put_failure:
2099         genlmsg_cancel(msg, hdr);
2100         return -EMSGSIZE;
2101 }
2102
2103 static int nl80211_dump_mpath(struct sk_buff *skb,
2104                               struct netlink_callback *cb)
2105 {
2106         struct mpath_info pinfo;
2107         struct cfg80211_registered_device *dev;
2108         struct net_device *netdev;
2109         u8 dst[ETH_ALEN];
2110         u8 next_hop[ETH_ALEN];
2111         int ifidx = cb->args[0];
2112         int path_idx = cb->args[1];
2113         int err;
2114
2115         if (!ifidx) {
2116                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2117                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2118                                   nl80211_policy);
2119                 if (err)
2120                         return err;
2121
2122                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2123                         return -EINVAL;
2124
2125                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2126                 if (!ifidx)
2127                         return -EINVAL;
2128         }
2129
2130         rtnl_lock();
2131
2132         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2133         if (!netdev) {
2134                 err = -ENODEV;
2135                 goto out_rtnl;
2136         }
2137
2138         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2139         if (IS_ERR(dev)) {
2140                 err = PTR_ERR(dev);
2141                 goto out_rtnl;
2142         }
2143
2144         if (!dev->ops->dump_mpath) {
2145                 err = -EOPNOTSUPP;
2146                 goto out_err;
2147         }
2148
2149         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2150                 err = -EOPNOTSUPP;
2151                 goto out_err;
2152         }
2153
2154         while (1) {
2155                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2156                                            dst, next_hop, &pinfo);
2157                 if (err == -ENOENT)
2158                         break;
2159                 if (err)
2160                         goto out_err;
2161
2162                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2163                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2164                                        netdev, dst, next_hop,
2165                                        &pinfo) < 0)
2166                         goto out;
2167
2168                 path_idx++;
2169         }
2170
2171
2172  out:
2173         cb->args[1] = path_idx;
2174         err = skb->len;
2175  out_err:
2176         cfg80211_unlock_rdev(dev);
2177  out_rtnl:
2178         rtnl_unlock();
2179
2180         return err;
2181 }
2182
2183 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2184 {
2185         struct cfg80211_registered_device *rdev;
2186         int err;
2187         struct net_device *dev;
2188         struct mpath_info pinfo;
2189         struct sk_buff *msg;
2190         u8 *dst = NULL;
2191         u8 next_hop[ETH_ALEN];
2192
2193         memset(&pinfo, 0, sizeof(pinfo));
2194
2195         if (!info->attrs[NL80211_ATTR_MAC])
2196                 return -EINVAL;
2197
2198         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2199
2200         rtnl_lock();
2201
2202         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2203         if (err)
2204                 goto out_rtnl;
2205
2206         if (!rdev->ops->get_mpath) {
2207                 err = -EOPNOTSUPP;
2208                 goto out;
2209         }
2210
2211         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2212                 err = -EOPNOTSUPP;
2213                 goto out;
2214         }
2215
2216         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2217         if (err)
2218                 goto out;
2219
2220         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2221         if (!msg)
2222                 goto out;
2223
2224         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2225                                  dev, dst, next_hop, &pinfo) < 0)
2226                 goto out_free;
2227
2228         err = genlmsg_reply(msg, info);
2229         goto out;
2230
2231  out_free:
2232         nlmsg_free(msg);
2233  out:
2234         cfg80211_unlock_rdev(rdev);
2235         dev_put(dev);
2236  out_rtnl:
2237         rtnl_unlock();
2238
2239         return err;
2240 }
2241
2242 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2243 {
2244         struct cfg80211_registered_device *rdev;
2245         int err;
2246         struct net_device *dev;
2247         u8 *dst = NULL;
2248         u8 *next_hop = NULL;
2249
2250         if (!info->attrs[NL80211_ATTR_MAC])
2251                 return -EINVAL;
2252
2253         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2254                 return -EINVAL;
2255
2256         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2257         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2258
2259         rtnl_lock();
2260
2261         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2262         if (err)
2263                 goto out_rtnl;
2264
2265         if (!rdev->ops->change_mpath) {
2266                 err = -EOPNOTSUPP;
2267                 goto out;
2268         }
2269
2270         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2271                 err = -EOPNOTSUPP;
2272                 goto out;
2273         }
2274
2275         if (!netif_running(dev)) {
2276                 err = -ENETDOWN;
2277                 goto out;
2278         }
2279
2280         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2281
2282  out:
2283         cfg80211_unlock_rdev(rdev);
2284         dev_put(dev);
2285  out_rtnl:
2286         rtnl_unlock();
2287
2288         return err;
2289 }
2290 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2291 {
2292         struct cfg80211_registered_device *rdev;
2293         int err;
2294         struct net_device *dev;
2295         u8 *dst = NULL;
2296         u8 *next_hop = NULL;
2297
2298         if (!info->attrs[NL80211_ATTR_MAC])
2299                 return -EINVAL;
2300
2301         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2302                 return -EINVAL;
2303
2304         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2305         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2306
2307         rtnl_lock();
2308
2309         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2310         if (err)
2311                 goto out_rtnl;
2312
2313         if (!rdev->ops->add_mpath) {
2314                 err = -EOPNOTSUPP;
2315                 goto out;
2316         }
2317
2318         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2319                 err = -EOPNOTSUPP;
2320                 goto out;
2321         }
2322
2323         if (!netif_running(dev)) {
2324                 err = -ENETDOWN;
2325                 goto out;
2326         }
2327
2328         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2329
2330  out:
2331         cfg80211_unlock_rdev(rdev);
2332         dev_put(dev);
2333  out_rtnl:
2334         rtnl_unlock();
2335
2336         return err;
2337 }
2338
2339 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2340 {
2341         struct cfg80211_registered_device *rdev;
2342         int err;
2343         struct net_device *dev;
2344         u8 *dst = NULL;
2345
2346         if (info->attrs[NL80211_ATTR_MAC])
2347                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2348
2349         rtnl_lock();
2350
2351         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2352         if (err)
2353                 goto out_rtnl;
2354
2355         if (!rdev->ops->del_mpath) {
2356                 err = -EOPNOTSUPP;
2357                 goto out;
2358         }
2359
2360         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2361
2362  out:
2363         cfg80211_unlock_rdev(rdev);
2364         dev_put(dev);
2365  out_rtnl:
2366         rtnl_unlock();
2367
2368         return err;
2369 }
2370
2371 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2372 {
2373         struct cfg80211_registered_device *rdev;
2374         int err;
2375         struct net_device *dev;
2376         struct bss_parameters params;
2377
2378         memset(&params, 0, sizeof(params));
2379         /* default to not changing parameters */
2380         params.use_cts_prot = -1;
2381         params.use_short_preamble = -1;
2382         params.use_short_slot_time = -1;
2383
2384         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2385                 params.use_cts_prot =
2386                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2387         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2388                 params.use_short_preamble =
2389                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2390         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2391                 params.use_short_slot_time =
2392                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2393         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2394                 params.basic_rates =
2395                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2396                 params.basic_rates_len =
2397                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2398         }
2399
2400         rtnl_lock();
2401
2402         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2403         if (err)
2404                 goto out_rtnl;
2405
2406         if (!rdev->ops->change_bss) {
2407                 err = -EOPNOTSUPP;
2408                 goto out;
2409         }
2410
2411         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2412                 err = -EOPNOTSUPP;
2413                 goto out;
2414         }
2415
2416         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2417
2418  out:
2419         cfg80211_unlock_rdev(rdev);
2420         dev_put(dev);
2421  out_rtnl:
2422         rtnl_unlock();
2423
2424         return err;
2425 }
2426
2427 static const struct nla_policy
2428         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2429         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2430         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2431         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2432         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2433         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2434         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2435 };
2436
2437 static int parse_reg_rule(struct nlattr *tb[],
2438         struct ieee80211_reg_rule *reg_rule)
2439 {
2440         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2441         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2442
2443         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2444                 return -EINVAL;
2445         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2446                 return -EINVAL;
2447         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2448                 return -EINVAL;
2449         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2450                 return -EINVAL;
2451         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2452                 return -EINVAL;
2453
2454         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2455
2456         freq_range->start_freq_khz =
2457                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2458         freq_range->end_freq_khz =
2459                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2460         freq_range->max_bandwidth_khz =
2461                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2462
2463         power_rule->max_eirp =
2464                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2465
2466         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2467                 power_rule->max_antenna_gain =
2468                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2469
2470         return 0;
2471 }
2472
2473 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2474 {
2475         int r;
2476         char *data = NULL;
2477
2478         /*
2479          * You should only get this when cfg80211 hasn't yet initialized
2480          * completely when built-in to the kernel right between the time
2481          * window between nl80211_init() and regulatory_init(), if that is
2482          * even possible.
2483          */
2484         mutex_lock(&cfg80211_mutex);
2485         if (unlikely(!cfg80211_regdomain)) {
2486                 mutex_unlock(&cfg80211_mutex);
2487                 return -EINPROGRESS;
2488         }
2489         mutex_unlock(&cfg80211_mutex);
2490
2491         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2492                 return -EINVAL;
2493
2494         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2495
2496 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2497         /* We ignore world regdom requests with the old regdom setup */
2498         if (is_world_regdom(data))
2499                 return -EINVAL;
2500 #endif
2501
2502         r = regulatory_hint_user(data);
2503
2504         return r;
2505 }
2506
2507 static int nl80211_get_mesh_params(struct sk_buff *skb,
2508         struct genl_info *info)
2509 {
2510         struct cfg80211_registered_device *rdev;
2511         struct mesh_config cur_params;
2512         int err;
2513         struct net_device *dev;
2514         void *hdr;
2515         struct nlattr *pinfoattr;
2516         struct sk_buff *msg;
2517
2518         rtnl_lock();
2519
2520         /* Look up our device */
2521         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2522         if (err)
2523                 goto out_rtnl;
2524
2525         if (!rdev->ops->get_mesh_params) {
2526                 err = -EOPNOTSUPP;
2527                 goto out;
2528         }
2529
2530         /* Get the mesh params */
2531         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2532         if (err)
2533                 goto out;
2534
2535         /* Draw up a netlink message to send back */
2536         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2537         if (!msg) {
2538                 err = -ENOBUFS;
2539                 goto out;
2540         }
2541         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2542                              NL80211_CMD_GET_MESH_PARAMS);
2543         if (!hdr)
2544                 goto nla_put_failure;
2545         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2546         if (!pinfoattr)
2547                 goto nla_put_failure;
2548         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2549         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2550                         cur_params.dot11MeshRetryTimeout);
2551         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2552                         cur_params.dot11MeshConfirmTimeout);
2553         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2554                         cur_params.dot11MeshHoldingTimeout);
2555         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2556                         cur_params.dot11MeshMaxPeerLinks);
2557         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2558                         cur_params.dot11MeshMaxRetries);
2559         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2560                         cur_params.dot11MeshTTL);
2561         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2562                         cur_params.auto_open_plinks);
2563         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2564                         cur_params.dot11MeshHWMPmaxPREQretries);
2565         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2566                         cur_params.path_refresh_time);
2567         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2568                         cur_params.min_discovery_timeout);
2569         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2570                         cur_params.dot11MeshHWMPactivePathTimeout);
2571         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2572                         cur_params.dot11MeshHWMPpreqMinInterval);
2573         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2574                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2575         nla_nest_end(msg, pinfoattr);
2576         genlmsg_end(msg, hdr);
2577         err = genlmsg_reply(msg, info);
2578         goto out;
2579
2580  nla_put_failure:
2581         genlmsg_cancel(msg, hdr);
2582         err = -EMSGSIZE;
2583  out:
2584         /* Cleanup */
2585         cfg80211_unlock_rdev(rdev);
2586         dev_put(dev);
2587  out_rtnl:
2588         rtnl_unlock();
2589
2590         return err;
2591 }
2592
2593 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2594 do {\
2595         if (table[attr_num]) {\
2596                 cfg.param = nla_fn(table[attr_num]); \
2597                 mask |= (1 << (attr_num - 1)); \
2598         } \
2599 } while (0);\
2600
2601 static struct nla_policy
2602 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2603         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2604         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2605         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2606         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2607         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2608         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2609         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2610
2611         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2612         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2613         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2614         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2615         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2616         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2617 };
2618
2619 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2620 {
2621         int err;
2622         u32 mask;
2623         struct cfg80211_registered_device *rdev;
2624         struct net_device *dev;
2625         struct mesh_config cfg;
2626         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2627         struct nlattr *parent_attr;
2628
2629         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2630         if (!parent_attr)
2631                 return -EINVAL;
2632         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2633                         parent_attr, nl80211_meshconf_params_policy))
2634                 return -EINVAL;
2635
2636         rtnl_lock();
2637
2638         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2639         if (err)
2640                 goto out_rtnl;
2641
2642         if (!rdev->ops->set_mesh_params) {
2643                 err = -EOPNOTSUPP;
2644                 goto out;
2645         }
2646
2647         /* This makes sure that there aren't more than 32 mesh config
2648          * parameters (otherwise our bitfield scheme would not work.) */
2649         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2650
2651         /* Fill in the params struct */
2652         mask = 0;
2653         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2654                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2655         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2656                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2657         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2658                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2659         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2660                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2661         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2662                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2663         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2664                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2665         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2666                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2667         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2668                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2669                         nla_get_u8);
2670         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2671                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2672         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2673                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2674                         nla_get_u16);
2675         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2676                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2677                         nla_get_u32);
2678         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2679                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2680                         nla_get_u16);
2681         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2682                         dot11MeshHWMPnetDiameterTraversalTime,
2683                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2684                         nla_get_u16);
2685
2686         /* Apply changes */
2687         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2688
2689  out:
2690         /* cleanup */
2691         cfg80211_unlock_rdev(rdev);
2692         dev_put(dev);
2693  out_rtnl:
2694         rtnl_unlock();
2695
2696         return err;
2697 }
2698
2699 #undef FILL_IN_MESH_PARAM_IF_SET
2700
2701 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2702 {
2703         struct sk_buff *msg;
2704         void *hdr = NULL;
2705         struct nlattr *nl_reg_rules;
2706         unsigned int i;
2707         int err = -EINVAL;
2708
2709         mutex_lock(&cfg80211_mutex);
2710
2711         if (!cfg80211_regdomain)
2712                 goto out;
2713
2714         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2715         if (!msg) {
2716                 err = -ENOBUFS;
2717                 goto out;
2718         }
2719
2720         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2721                              NL80211_CMD_GET_REG);
2722         if (!hdr)
2723                 goto nla_put_failure;
2724
2725         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2726                 cfg80211_regdomain->alpha2);
2727
2728         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2729         if (!nl_reg_rules)
2730                 goto nla_put_failure;
2731
2732         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2733                 struct nlattr *nl_reg_rule;
2734                 const struct ieee80211_reg_rule *reg_rule;
2735                 const struct ieee80211_freq_range *freq_range;
2736                 const struct ieee80211_power_rule *power_rule;
2737
2738                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2739                 freq_range = &reg_rule->freq_range;
2740                 power_rule = &reg_rule->power_rule;
2741
2742                 nl_reg_rule = nla_nest_start(msg, i);
2743                 if (!nl_reg_rule)
2744                         goto nla_put_failure;
2745
2746                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2747                         reg_rule->flags);
2748                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2749                         freq_range->start_freq_khz);
2750                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2751                         freq_range->end_freq_khz);
2752                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2753                         freq_range->max_bandwidth_khz);
2754                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2755                         power_rule->max_antenna_gain);
2756                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2757                         power_rule->max_eirp);
2758
2759                 nla_nest_end(msg, nl_reg_rule);
2760         }
2761
2762         nla_nest_end(msg, nl_reg_rules);
2763
2764         genlmsg_end(msg, hdr);
2765         err = genlmsg_reply(msg, info);
2766         goto out;
2767
2768 nla_put_failure:
2769         genlmsg_cancel(msg, hdr);
2770         err = -EMSGSIZE;
2771 out:
2772         mutex_unlock(&cfg80211_mutex);
2773         return err;
2774 }
2775
2776 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2777 {
2778         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2779         struct nlattr *nl_reg_rule;
2780         char *alpha2 = NULL;
2781         int rem_reg_rules = 0, r = 0;
2782         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2783         struct ieee80211_regdomain *rd = NULL;
2784
2785         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2786                 return -EINVAL;
2787
2788         if (!info->attrs[NL80211_ATTR_REG_RULES])
2789                 return -EINVAL;
2790
2791         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2792
2793         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2794                         rem_reg_rules) {
2795                 num_rules++;
2796                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2797                         return -EINVAL;
2798         }
2799
2800         mutex_lock(&cfg80211_mutex);
2801
2802         if (!reg_is_valid_request(alpha2)) {
2803                 r = -EINVAL;
2804                 goto bad_reg;
2805         }
2806
2807         size_of_regd = sizeof(struct ieee80211_regdomain) +
2808                 (num_rules * sizeof(struct ieee80211_reg_rule));
2809
2810         rd = kzalloc(size_of_regd, GFP_KERNEL);
2811         if (!rd) {
2812                 r = -ENOMEM;
2813                 goto bad_reg;
2814         }
2815
2816         rd->n_reg_rules = num_rules;
2817         rd->alpha2[0] = alpha2[0];
2818         rd->alpha2[1] = alpha2[1];
2819
2820         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2821                         rem_reg_rules) {
2822                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2823                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2824                         reg_rule_policy);
2825                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2826                 if (r)
2827                         goto bad_reg;
2828
2829                 rule_idx++;
2830
2831                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2832                         r = -EINVAL;
2833                         goto bad_reg;
2834                 }
2835         }
2836
2837         BUG_ON(rule_idx != num_rules);
2838
2839         r = set_regdom(rd);
2840
2841         mutex_unlock(&cfg80211_mutex);
2842
2843         return r;
2844
2845  bad_reg:
2846         mutex_unlock(&cfg80211_mutex);
2847         kfree(rd);
2848         return r;
2849 }
2850
2851 static int validate_scan_freqs(struct nlattr *freqs)
2852 {
2853         struct nlattr *attr1, *attr2;
2854         int n_channels = 0, tmp1, tmp2;
2855
2856         nla_for_each_nested(attr1, freqs, tmp1) {
2857                 n_channels++;
2858                 /*
2859                  * Some hardware has a limited channel list for
2860                  * scanning, and it is pretty much nonsensical
2861                  * to scan for a channel twice, so disallow that
2862                  * and don't require drivers to check that the
2863                  * channel list they get isn't longer than what
2864                  * they can scan, as long as they can scan all
2865                  * the channels they registered at once.
2866                  */
2867                 nla_for_each_nested(attr2, freqs, tmp2)
2868                         if (attr1 != attr2 &&
2869                             nla_get_u32(attr1) == nla_get_u32(attr2))
2870                                 return 0;
2871         }
2872
2873         return n_channels;
2874 }
2875
2876 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2877 {
2878         struct cfg80211_registered_device *rdev;
2879         struct net_device *dev;
2880         struct cfg80211_scan_request *request;
2881         struct cfg80211_ssid *ssid;
2882         struct ieee80211_channel *channel;
2883         struct nlattr *attr;
2884         struct wiphy *wiphy;
2885         int err, tmp, n_ssids = 0, n_channels, i;
2886         enum ieee80211_band band;
2887         size_t ie_len;
2888
2889         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2890                 return -EINVAL;
2891
2892         rtnl_lock();
2893
2894         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2895         if (err)
2896                 goto out_rtnl;
2897
2898         wiphy = &rdev->wiphy;
2899
2900         if (!rdev->ops->scan) {
2901                 err = -EOPNOTSUPP;
2902                 goto out;
2903         }
2904
2905         if (!netif_running(dev)) {
2906                 err = -ENETDOWN;
2907                 goto out;
2908         }
2909
2910         if (rdev->scan_req) {
2911                 err = -EBUSY;
2912                 goto out;
2913         }
2914
2915         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2916                 n_channels = validate_scan_freqs(
2917                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2918                 if (!n_channels) {
2919                         err = -EINVAL;
2920                         goto out;
2921                 }
2922         } else {
2923                 n_channels = 0;
2924
2925                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2926                         if (wiphy->bands[band])
2927                                 n_channels += wiphy->bands[band]->n_channels;
2928         }
2929
2930         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2931                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2932                         n_ssids++;
2933
2934         if (n_ssids > wiphy->max_scan_ssids) {
2935                 err = -EINVAL;
2936                 goto out;
2937         }
2938
2939         if (info->attrs[NL80211_ATTR_IE])
2940                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2941         else
2942                 ie_len = 0;
2943
2944         if (ie_len > wiphy->max_scan_ie_len) {
2945                 err = -EINVAL;
2946                 goto out;
2947         }
2948
2949         request = kzalloc(sizeof(*request)
2950                         + sizeof(*ssid) * n_ssids
2951                         + sizeof(channel) * n_channels
2952                         + ie_len, GFP_KERNEL);
2953         if (!request) {
2954                 err = -ENOMEM;
2955                 goto out;
2956         }
2957
2958         request->n_channels = n_channels;
2959         if (n_ssids)
2960                 request->ssids = (void *)&request->channels[n_channels];
2961         request->n_ssids = n_ssids;
2962         if (ie_len) {
2963                 if (request->ssids)
2964                         request->ie = (void *)(request->ssids + n_ssids);
2965                 else
2966                         request->ie = (void *)(request->channels + n_channels);
2967         }
2968
2969         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2970                 /* user specified, bail out if channel not found */
2971                 request->n_channels = n_channels;
2972                 i = 0;
2973                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2974                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2975                         if (!request->channels[i]) {
2976                                 err = -EINVAL;
2977                                 goto out_free;
2978                         }
2979                         i++;
2980                 }
2981         } else {
2982                 /* all channels */
2983                 i = 0;
2984                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2985                         int j;
2986                         if (!wiphy->bands[band])
2987                                 continue;
2988                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2989                                 request->channels[i] = &wiphy->bands[band]->channels[j];
2990                                 i++;
2991                         }
2992                 }
2993         }
2994
2995         i = 0;
2996         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2997                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2998                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2999                                 err = -EINVAL;
3000                                 goto out_free;
3001                         }
3002                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3003                         request->ssids[i].ssid_len = nla_len(attr);
3004                         i++;
3005                 }
3006         }
3007
3008         if (info->attrs[NL80211_ATTR_IE]) {
3009                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3010                 memcpy((void *)request->ie,
3011                        nla_data(info->attrs[NL80211_ATTR_IE]),
3012                        request->ie_len);
3013         }
3014
3015         request->dev = dev;
3016         request->wiphy = &rdev->wiphy;
3017
3018         rdev->scan_req = request;
3019         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3020
3021         if (!err) {
3022                 nl80211_send_scan_start(rdev, dev);
3023                 dev_hold(dev);
3024         }
3025
3026  out_free:
3027         if (err) {
3028                 rdev->scan_req = NULL;
3029                 kfree(request);
3030         }
3031  out:
3032         cfg80211_unlock_rdev(rdev);
3033         dev_put(dev);
3034  out_rtnl:
3035         rtnl_unlock();
3036
3037         return err;
3038 }
3039
3040 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3041                             struct cfg80211_registered_device *rdev,
3042                             struct wireless_dev *wdev,
3043                             struct cfg80211_internal_bss *intbss)
3044 {
3045         struct cfg80211_bss *res = &intbss->pub;
3046         void *hdr;
3047         struct nlattr *bss;
3048         int i;
3049
3050         ASSERT_WDEV_LOCK(wdev);
3051
3052         hdr = nl80211hdr_put(msg, pid, seq, flags,
3053                              NL80211_CMD_NEW_SCAN_RESULTS);
3054         if (!hdr)
3055                 return -1;
3056
3057         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3058         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3059
3060         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3061         if (!bss)
3062                 goto nla_put_failure;
3063         if (!is_zero_ether_addr(res->bssid))
3064                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3065         if (res->information_elements && res->len_information_elements)
3066                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3067                         res->len_information_elements,
3068                         res->information_elements);
3069         if (res->tsf)
3070                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3071         if (res->beacon_interval)
3072                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3073         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3074         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3075
3076         switch (rdev->wiphy.signal_type) {
3077         case CFG80211_SIGNAL_TYPE_MBM:
3078                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3079                 break;
3080         case CFG80211_SIGNAL_TYPE_UNSPEC:
3081                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3082                 break;
3083         default:
3084                 break;
3085         }
3086
3087         switch (wdev->iftype) {
3088         case NL80211_IFTYPE_STATION:
3089                 if (intbss == wdev->current_bss)
3090                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3091                                     NL80211_BSS_STATUS_ASSOCIATED);
3092                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3093                         if (intbss != wdev->auth_bsses[i])
3094                                 continue;
3095                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3096                                     NL80211_BSS_STATUS_AUTHENTICATED);
3097                         break;
3098                 }
3099                 break;
3100         case NL80211_IFTYPE_ADHOC:
3101                 if (intbss == wdev->current_bss)
3102                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3103                                     NL80211_BSS_STATUS_IBSS_JOINED);
3104                 break;
3105         default:
3106                 break;
3107         }
3108
3109         nla_nest_end(msg, bss);
3110
3111         return genlmsg_end(msg, hdr);
3112
3113  nla_put_failure:
3114         genlmsg_cancel(msg, hdr);
3115         return -EMSGSIZE;
3116 }
3117
3118 static int nl80211_dump_scan(struct sk_buff *skb,
3119                              struct netlink_callback *cb)
3120 {
3121         struct cfg80211_registered_device *rdev;
3122         struct net_device *dev;
3123         struct cfg80211_internal_bss *scan;
3124         struct wireless_dev *wdev;
3125         int ifidx = cb->args[0];
3126         int start = cb->args[1], idx = 0;
3127         int err;
3128
3129         if (!ifidx) {
3130                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
3131                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
3132                                   nl80211_policy);
3133                 if (err)
3134                         return err;
3135
3136                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
3137                         return -EINVAL;
3138
3139                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
3140                 if (!ifidx)
3141                         return -EINVAL;
3142                 cb->args[0] = ifidx;
3143         }
3144
3145         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3146         if (!dev)
3147                 return -ENODEV;
3148
3149         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3150         if (IS_ERR(rdev)) {
3151                 err = PTR_ERR(rdev);
3152                 goto out_put_netdev;
3153         }
3154
3155         wdev = dev->ieee80211_ptr;
3156
3157         wdev_lock(wdev);
3158         spin_lock_bh(&rdev->bss_lock);
3159         cfg80211_bss_expire(rdev);
3160
3161         list_for_each_entry(scan, &rdev->bss_list, list) {
3162                 if (++idx <= start)
3163                         continue;
3164                 if (nl80211_send_bss(skb,
3165                                 NETLINK_CB(cb->skb).pid,
3166                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3167                                 rdev, wdev, scan) < 0) {
3168                         idx--;
3169                         goto out;
3170                 }
3171         }
3172
3173  out:
3174         spin_unlock_bh(&rdev->bss_lock);
3175         wdev_unlock(wdev);
3176
3177         cb->args[1] = idx;
3178         err = skb->len;
3179         cfg80211_unlock_rdev(rdev);
3180  out_put_netdev:
3181         dev_put(dev);
3182
3183         return err;
3184 }
3185
3186 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3187 {
3188         return auth_type <= NL80211_AUTHTYPE_MAX;
3189 }
3190
3191 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3192 {
3193         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3194                                   NL80211_WPA_VERSION_2));
3195 }
3196
3197 static bool nl80211_valid_akm_suite(u32 akm)
3198 {
3199         return akm == WLAN_AKM_SUITE_8021X ||
3200                 akm == WLAN_AKM_SUITE_PSK;
3201 }
3202
3203 static bool nl80211_valid_cipher_suite(u32 cipher)
3204 {
3205         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3206                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3207                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3208                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3209                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3210 }
3211
3212
3213 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3214 {
3215         struct cfg80211_registered_device *rdev;
3216         struct net_device *dev;
3217         struct ieee80211_channel *chan;
3218         const u8 *bssid, *ssid, *ie = NULL;
3219         int err, ssid_len, ie_len = 0;
3220         enum nl80211_auth_type auth_type;
3221         struct key_parse key;
3222
3223         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3224                 return -EINVAL;
3225
3226         if (!info->attrs[NL80211_ATTR_MAC])
3227                 return -EINVAL;
3228
3229         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3230                 return -EINVAL;
3231
3232         if (!info->attrs[NL80211_ATTR_SSID])
3233                 return -EINVAL;
3234
3235         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3236                 return -EINVAL;
3237
3238         err = nl80211_parse_key(info, &key);
3239         if (err)
3240                 return err;
3241
3242         if (key.idx >= 0) {
3243                 if (!key.p.key || !key.p.key_len)
3244                         return -EINVAL;
3245                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3246                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3247                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3248                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3249                         return -EINVAL;
3250                 if (key.idx > 4)
3251                         return -EINVAL;
3252         } else {
3253                 key.p.key_len = 0;
3254                 key.p.key = NULL;
3255         }
3256
3257         rtnl_lock();
3258
3259         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3260         if (err)
3261                 goto unlock_rtnl;
3262
3263         if (!rdev->ops->auth) {
3264                 err = -EOPNOTSUPP;
3265                 goto out;
3266         }
3267
3268         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3269                 err = -EOPNOTSUPP;
3270                 goto out;
3271         }
3272
3273         if (!netif_running(dev)) {
3274                 err = -ENETDOWN;
3275                 goto out;
3276         }
3277
3278         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3279         chan = ieee80211_get_channel(&rdev->wiphy,
3280                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3281         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3282                 err = -EINVAL;
3283                 goto out;
3284         }
3285
3286         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3287         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3288
3289         if (info->attrs[NL80211_ATTR_IE]) {
3290                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3291                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3292         }
3293
3294         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3295         if (!nl80211_valid_auth_type(auth_type)) {
3296                 err = -EINVAL;
3297                 goto out;
3298         }
3299
3300         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3301                                  ssid, ssid_len, ie, ie_len,
3302                                  key.p.key, key.p.key_len, key.idx);
3303
3304 out:
3305         cfg80211_unlock_rdev(rdev);
3306         dev_put(dev);
3307 unlock_rtnl:
3308         rtnl_unlock();
3309         return err;
3310 }
3311
3312 static int nl80211_crypto_settings(struct genl_info *info,
3313                                    struct cfg80211_crypto_settings *settings,
3314                                    int cipher_limit)
3315 {
3316         memset(settings, 0, sizeof(*settings));
3317
3318         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3319
3320         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3321                 void *data;
3322                 int len, i;
3323
3324                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3325                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3326                 settings->n_ciphers_pairwise = len / sizeof(u32);
3327
3328                 if (len % sizeof(u32))
3329                         return -EINVAL;
3330
3331                 if (settings->n_ciphers_pairwise > cipher_limit)
3332                         return -EINVAL;
3333
3334                 memcpy(settings->ciphers_pairwise, data, len);
3335
3336                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3337                         if (!nl80211_valid_cipher_suite(
3338                                         settings->ciphers_pairwise[i]))
3339                                 return -EINVAL;
3340         }
3341
3342         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3343                 settings->cipher_group =
3344                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3345                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3346                         return -EINVAL;
3347         }
3348
3349         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3350                 settings->wpa_versions =
3351                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3352                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3353                         return -EINVAL;
3354         }
3355
3356         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3357                 void *data;
3358                 int len, i;
3359
3360                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3361                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3362                 settings->n_akm_suites = len / sizeof(u32);
3363
3364                 if (len % sizeof(u32))
3365                         return -EINVAL;
3366
3367                 memcpy(settings->akm_suites, data, len);
3368
3369                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3370                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3371                                 return -EINVAL;
3372         }
3373
3374         return 0;
3375 }
3376
3377 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3378 {
3379         struct cfg80211_registered_device *rdev;
3380         struct net_device *dev;
3381         struct cfg80211_crypto_settings crypto;
3382         struct ieee80211_channel *chan, *fixedchan;
3383         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3384         int err, ssid_len, ie_len = 0;
3385         bool use_mfp = false;
3386
3387         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3388                 return -EINVAL;
3389
3390         if (!info->attrs[NL80211_ATTR_MAC] ||
3391             !info->attrs[NL80211_ATTR_SSID] ||
3392             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3393                 return -EINVAL;
3394
3395         rtnl_lock();
3396
3397         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3398         if (err)
3399                 goto unlock_rtnl;
3400
3401         if (!rdev->ops->assoc) {
3402                 err = -EOPNOTSUPP;
3403                 goto out;
3404         }
3405
3406         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3407                 err = -EOPNOTSUPP;
3408                 goto out;
3409         }
3410
3411         if (!netif_running(dev)) {
3412                 err = -ENETDOWN;
3413                 goto out;
3414         }
3415
3416         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3417
3418         chan = ieee80211_get_channel(&rdev->wiphy,
3419                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3420         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3421                 err = -EINVAL;
3422                 goto out;
3423         }
3424
3425         mutex_lock(&rdev->devlist_mtx);
3426         fixedchan = rdev_fixed_channel(rdev, NULL);
3427         if (fixedchan && chan != fixedchan) {
3428                 err = -EBUSY;
3429                 mutex_unlock(&rdev->devlist_mtx);
3430                 goto out;
3431         }
3432         mutex_unlock(&rdev->devlist_mtx);
3433
3434         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3435         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3436
3437         if (info->attrs[NL80211_ATTR_IE]) {
3438                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3439                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3440         }
3441
3442         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3443                 enum nl80211_mfp mfp =
3444                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3445                 if (mfp == NL80211_MFP_REQUIRED)
3446                         use_mfp = true;
3447                 else if (mfp != NL80211_MFP_NO) {
3448                         err = -EINVAL;
3449                         goto out;
3450                 }
3451         }
3452
3453         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3454                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3455
3456         err = nl80211_crypto_settings(info, &crypto, 1);
3457         if (!err)
3458                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3459                                           ssid, ssid_len, ie, ie_len, use_mfp,
3460                                           &crypto);
3461
3462 out:
3463         cfg80211_unlock_rdev(rdev);
3464         dev_put(dev);
3465 unlock_rtnl:
3466         rtnl_unlock();
3467         return err;
3468 }
3469
3470 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3471 {
3472         struct cfg80211_registered_device *rdev;
3473         struct net_device *dev;
3474         const u8 *ie = NULL, *bssid;
3475         int err, ie_len = 0;
3476         u16 reason_code;
3477
3478         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3479                 return -EINVAL;
3480
3481         if (!info->attrs[NL80211_ATTR_MAC])
3482                 return -EINVAL;
3483
3484         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3485                 return -EINVAL;
3486
3487         rtnl_lock();
3488
3489         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3490         if (err)
3491                 goto unlock_rtnl;
3492
3493         if (!rdev->ops->deauth) {
3494                 err = -EOPNOTSUPP;
3495                 goto out;
3496         }
3497
3498         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3499                 err = -EOPNOTSUPP;
3500                 goto out;
3501         }
3502
3503         if (!netif_running(dev)) {
3504                 err = -ENETDOWN;
3505                 goto out;
3506         }
3507
3508         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3509
3510         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3511         if (reason_code == 0) {
3512                 /* Reason Code 0 is reserved */
3513                 err = -EINVAL;
3514                 goto out;
3515         }
3516
3517         if (info->attrs[NL80211_ATTR_IE]) {
3518                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3519                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3520         }
3521
3522         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3523
3524 out:
3525         cfg80211_unlock_rdev(rdev);
3526         dev_put(dev);
3527 unlock_rtnl:
3528         rtnl_unlock();
3529         return err;
3530 }
3531
3532 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3533 {
3534         struct cfg80211_registered_device *rdev;
3535         struct net_device *dev;
3536         const u8 *ie = NULL, *bssid;
3537         int err, ie_len = 0;
3538         u16 reason_code;
3539
3540         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3541                 return -EINVAL;
3542
3543         if (!info->attrs[NL80211_ATTR_MAC])
3544                 return -EINVAL;
3545
3546         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3547                 return -EINVAL;
3548
3549         rtnl_lock();
3550
3551         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3552         if (err)
3553                 goto unlock_rtnl;
3554
3555         if (!rdev->ops->disassoc) {
3556                 err = -EOPNOTSUPP;
3557                 goto out;
3558         }
3559
3560         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3561                 err = -EOPNOTSUPP;
3562                 goto out;
3563         }
3564
3565         if (!netif_running(dev)) {
3566                 err = -ENETDOWN;
3567                 goto out;
3568         }
3569
3570         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3571
3572         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3573         if (reason_code == 0) {
3574                 /* Reason Code 0 is reserved */
3575                 err = -EINVAL;
3576                 goto out;
3577         }
3578
3579         if (info->attrs[NL80211_ATTR_IE]) {
3580                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3581                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3582         }
3583
3584         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3585
3586 out:
3587         cfg80211_unlock_rdev(rdev);
3588         dev_put(dev);
3589 unlock_rtnl:
3590         rtnl_unlock();
3591         return err;
3592 }
3593
3594 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3595 {
3596         struct cfg80211_registered_device *rdev;
3597         struct net_device *dev;
3598         struct cfg80211_ibss_params ibss;
3599         struct wiphy *wiphy;
3600         struct cfg80211_cached_keys *connkeys = NULL;
3601         int err;
3602
3603         memset(&ibss, 0, sizeof(ibss));
3604
3605         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3606                 return -EINVAL;
3607
3608         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3609             !info->attrs[NL80211_ATTR_SSID] ||
3610             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3611                 return -EINVAL;
3612
3613         ibss.beacon_interval = 100;
3614
3615         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3616                 ibss.beacon_interval =
3617                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3618                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3619                         return -EINVAL;
3620         }
3621
3622         rtnl_lock();
3623
3624         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3625         if (err)
3626                 goto unlock_rtnl;
3627
3628         if (!rdev->ops->join_ibss) {
3629                 err = -EOPNOTSUPP;
3630                 goto out;
3631         }
3632
3633         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3634                 err = -EOPNOTSUPP;
3635                 goto out;
3636         }
3637
3638         if (!netif_running(dev)) {
3639                 err = -ENETDOWN;
3640                 goto out;
3641         }
3642
3643         wiphy = &rdev->wiphy;
3644
3645         if (info->attrs[NL80211_ATTR_MAC])
3646                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3647         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3648         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3649
3650         if (info->attrs[NL80211_ATTR_IE]) {
3651                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3652                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3653         }
3654
3655         ibss.channel = ieee80211_get_channel(wiphy,
3656                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3657         if (!ibss.channel ||
3658             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3659             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3660                 err = -EINVAL;
3661                 goto out;
3662         }
3663
3664         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3665         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3666
3667         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3668                 connkeys = nl80211_parse_connkeys(rdev,
3669                                         info->attrs[NL80211_ATTR_KEYS]);
3670                 if (IS_ERR(connkeys)) {
3671                         err = PTR_ERR(connkeys);
3672                         connkeys = NULL;
3673                         goto out;
3674                 }
3675         }
3676
3677         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3678
3679 out:
3680         cfg80211_unlock_rdev(rdev);
3681         dev_put(dev);
3682 unlock_rtnl:
3683         if (err)
3684                 kfree(connkeys);
3685         rtnl_unlock();
3686         return err;
3687 }
3688
3689 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3690 {
3691         struct cfg80211_registered_device *rdev;
3692         struct net_device *dev;
3693         int err;
3694
3695         rtnl_lock();
3696
3697         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3698         if (err)
3699                 goto unlock_rtnl;
3700
3701         if (!rdev->ops->leave_ibss) {
3702                 err = -EOPNOTSUPP;
3703                 goto out;
3704         }
3705
3706         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3707                 err = -EOPNOTSUPP;
3708                 goto out;
3709         }
3710
3711         if (!netif_running(dev)) {
3712                 err = -ENETDOWN;
3713                 goto out;
3714         }
3715
3716         err = cfg80211_leave_ibss(rdev, dev, false);
3717
3718 out:
3719         cfg80211_unlock_rdev(rdev);
3720         dev_put(dev);
3721 unlock_rtnl:
3722         rtnl_unlock();
3723         return err;
3724 }
3725
3726 #ifdef CONFIG_NL80211_TESTMODE
3727 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3728         .name = "testmode",
3729 };
3730
3731 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3732 {
3733         struct cfg80211_registered_device *rdev;
3734         int err;
3735
3736         if (!info->attrs[NL80211_ATTR_TESTDATA])
3737                 return -EINVAL;
3738
3739         rtnl_lock();
3740
3741         rdev = cfg80211_get_dev_from_info(info);
3742         if (IS_ERR(rdev)) {
3743                 err = PTR_ERR(rdev);
3744                 goto unlock_rtnl;
3745         }
3746
3747         err = -EOPNOTSUPP;
3748         if (rdev->ops->testmode_cmd) {
3749                 rdev->testmode_info = info;
3750                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3751                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3752                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3753                 rdev->testmode_info = NULL;
3754         }
3755
3756         cfg80211_unlock_rdev(rdev);
3757
3758  unlock_rtnl:
3759         rtnl_unlock();
3760         return err;
3761 }
3762
3763 static struct sk_buff *
3764 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3765                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3766 {
3767         struct sk_buff *skb;
3768         void *hdr;
3769         struct nlattr *data;
3770
3771         skb = nlmsg_new(approxlen + 100, gfp);
3772         if (!skb)
3773                 return NULL;
3774
3775         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3776         if (!hdr) {
3777                 kfree_skb(skb);
3778                 return NULL;
3779         }
3780
3781         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3782         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3783
3784         ((void **)skb->cb)[0] = rdev;
3785         ((void **)skb->cb)[1] = hdr;
3786         ((void **)skb->cb)[2] = data;
3787
3788         return skb;
3789
3790  nla_put_failure:
3791         kfree_skb(skb);
3792         return NULL;
3793 }
3794
3795 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3796                                                   int approxlen)
3797 {
3798         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3799
3800         if (WARN_ON(!rdev->testmode_info))
3801                 return NULL;
3802
3803         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3804                                 rdev->testmode_info->snd_pid,
3805                                 rdev->testmode_info->snd_seq,
3806                                 GFP_KERNEL);
3807 }
3808 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3809
3810 int cfg80211_testmode_reply(struct sk_buff *skb)
3811 {
3812         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3813         void *hdr = ((void **)skb->cb)[1];
3814         struct nlattr *data = ((void **)skb->cb)[2];
3815
3816         if (WARN_ON(!rdev->testmode_info)) {
3817                 kfree_skb(skb);
3818                 return -EINVAL;
3819         }
3820
3821         nla_nest_end(skb, data);
3822         genlmsg_end(skb, hdr);
3823         return genlmsg_reply(skb, rdev->testmode_info);
3824 }
3825 EXPORT_SYMBOL(cfg80211_testmode_reply);
3826
3827 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3828                                                   int approxlen, gfp_t gfp)
3829 {
3830         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3831
3832         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3833 }
3834 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3835
3836 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3837 {
3838         void *hdr = ((void **)skb->cb)[1];
3839         struct nlattr *data = ((void **)skb->cb)[2];
3840
3841         nla_nest_end(skb, data);
3842         genlmsg_end(skb, hdr);
3843         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3844 }
3845 EXPORT_SYMBOL(cfg80211_testmode_event);
3846 #endif
3847
3848 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3849 {
3850         struct cfg80211_registered_device *rdev;
3851         struct net_device *dev;
3852         struct cfg80211_connect_params connect;
3853         struct wiphy *wiphy;
3854         struct cfg80211_cached_keys *connkeys = NULL;
3855         int err;
3856
3857         memset(&connect, 0, sizeof(connect));
3858
3859         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3860                 return -EINVAL;
3861
3862         if (!info->attrs[NL80211_ATTR_SSID] ||
3863             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3864                 return -EINVAL;
3865
3866         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3867                 connect.auth_type =
3868                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3869                 if (!nl80211_valid_auth_type(connect.auth_type))
3870                         return -EINVAL;
3871         } else
3872                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3873
3874         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3875
3876         err = nl80211_crypto_settings(info, &connect.crypto,
3877                                       NL80211_MAX_NR_CIPHER_SUITES);
3878         if (err)
3879                 return err;
3880         rtnl_lock();
3881
3882         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3883         if (err)
3884                 goto unlock_rtnl;
3885
3886         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3887                 err = -EOPNOTSUPP;
3888                 goto out;
3889         }
3890
3891         if (!netif_running(dev)) {
3892                 err = -ENETDOWN;
3893                 goto out;
3894         }
3895
3896         wiphy = &rdev->wiphy;
3897
3898         if (info->attrs[NL80211_ATTR_MAC])
3899                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3900         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3901         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3902
3903         if (info->attrs[NL80211_ATTR_IE]) {
3904                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3905                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3906         }
3907
3908         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3909                 connect.channel =
3910                         ieee80211_get_channel(wiphy,
3911                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3912                 if (!connect.channel ||
3913                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
3914                         err = -EINVAL;
3915                         goto out;
3916                 }
3917         }
3918
3919         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3920                 connkeys = nl80211_parse_connkeys(rdev,
3921                                         info->attrs[NL80211_ATTR_KEYS]);
3922                 if (IS_ERR(connkeys)) {
3923                         err = PTR_ERR(connkeys);
3924                         connkeys = NULL;
3925                         goto out;
3926                 }
3927         }
3928
3929         err = cfg80211_connect(rdev, dev, &connect, connkeys);
3930
3931 out:
3932         cfg80211_unlock_rdev(rdev);
3933         dev_put(dev);
3934 unlock_rtnl:
3935         if (err)
3936                 kfree(connkeys);
3937         rtnl_unlock();
3938         return err;
3939 }
3940
3941 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
3942 {
3943         struct cfg80211_registered_device *rdev;
3944         struct net_device *dev;
3945         int err;
3946         u16 reason;
3947
3948         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3949                 reason = WLAN_REASON_DEAUTH_LEAVING;
3950         else
3951                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3952
3953         if (reason == 0)
3954                 return -EINVAL;
3955
3956         rtnl_lock();
3957
3958         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3959         if (err)
3960                 goto unlock_rtnl;
3961
3962         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3963                 err = -EOPNOTSUPP;
3964                 goto out;
3965         }
3966
3967         if (!netif_running(dev)) {
3968                 err = -ENETDOWN;
3969                 goto out;
3970         }
3971
3972         err = cfg80211_disconnect(rdev, dev, reason, true);
3973
3974 out:
3975         cfg80211_unlock_rdev(rdev);
3976         dev_put(dev);
3977 unlock_rtnl:
3978         rtnl_unlock();
3979         return err;
3980 }
3981
3982 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
3983 {
3984         struct cfg80211_registered_device *rdev;
3985         struct net *net;
3986         int err;
3987         u32 pid;
3988
3989         if (!info->attrs[NL80211_ATTR_PID])
3990                 return -EINVAL;
3991
3992         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
3993
3994         rtnl_lock();
3995
3996         rdev = cfg80211_get_dev_from_info(info);
3997         if (IS_ERR(rdev)) {
3998                 err = PTR_ERR(rdev);
3999                 goto out_rtnl;
4000         }
4001
4002         net = get_net_ns_by_pid(pid);
4003         if (IS_ERR(net)) {
4004                 err = PTR_ERR(net);
4005                 goto out;
4006         }
4007
4008         err = 0;
4009
4010         /* check if anything to do */
4011         if (net_eq(wiphy_net(&rdev->wiphy), net))
4012                 goto out_put_net;
4013
4014         err = cfg80211_switch_netns(rdev, net);
4015  out_put_net:
4016         put_net(net);
4017  out:
4018         cfg80211_unlock_rdev(rdev);
4019  out_rtnl:
4020         rtnl_unlock();
4021         return err;
4022 }
4023
4024 static struct genl_ops nl80211_ops[] = {
4025         {
4026                 .cmd = NL80211_CMD_GET_WIPHY,
4027                 .doit = nl80211_get_wiphy,
4028                 .dumpit = nl80211_dump_wiphy,
4029                 .policy = nl80211_policy,
4030                 /* can be retrieved by unprivileged users */
4031         },
4032         {
4033                 .cmd = NL80211_CMD_SET_WIPHY,
4034                 .doit = nl80211_set_wiphy,
4035                 .policy = nl80211_policy,
4036                 .flags = GENL_ADMIN_PERM,
4037         },
4038         {
4039                 .cmd = NL80211_CMD_GET_INTERFACE,
4040                 .doit = nl80211_get_interface,
4041                 .dumpit = nl80211_dump_interface,
4042                 .policy = nl80211_policy,
4043                 /* can be retrieved by unprivileged users */
4044         },
4045         {
4046                 .cmd = NL80211_CMD_SET_INTERFACE,
4047                 .doit = nl80211_set_interface,
4048                 .policy = nl80211_policy,
4049                 .flags = GENL_ADMIN_PERM,
4050         },
4051         {
4052                 .cmd = NL80211_CMD_NEW_INTERFACE,
4053                 .doit = nl80211_new_interface,
4054                 .policy = nl80211_policy,
4055                 .flags = GENL_ADMIN_PERM,
4056         },
4057         {
4058                 .cmd = NL80211_CMD_DEL_INTERFACE,
4059                 .doit = nl80211_del_interface,
4060                 .policy = nl80211_policy,
4061                 .flags = GENL_ADMIN_PERM,
4062         },
4063         {
4064                 .cmd = NL80211_CMD_GET_KEY,
4065                 .doit = nl80211_get_key,
4066                 .policy = nl80211_policy,
4067                 .flags = GENL_ADMIN_PERM,
4068         },
4069         {
4070                 .cmd = NL80211_CMD_SET_KEY,
4071                 .doit = nl80211_set_key,
4072                 .policy = nl80211_policy,
4073                 .flags = GENL_ADMIN_PERM,
4074         },
4075         {
4076                 .cmd = NL80211_CMD_NEW_KEY,
4077                 .doit = nl80211_new_key,
4078                 .policy = nl80211_policy,
4079                 .flags = GENL_ADMIN_PERM,
4080         },
4081         {
4082                 .cmd = NL80211_CMD_DEL_KEY,
4083                 .doit = nl80211_del_key,
4084                 .policy = nl80211_policy,
4085                 .flags = GENL_ADMIN_PERM,
4086         },
4087         {
4088                 .cmd = NL80211_CMD_SET_BEACON,
4089                 .policy = nl80211_policy,
4090                 .flags = GENL_ADMIN_PERM,
4091                 .doit = nl80211_addset_beacon,
4092         },
4093         {
4094                 .cmd = NL80211_CMD_NEW_BEACON,
4095                 .policy = nl80211_policy,
4096                 .flags = GENL_ADMIN_PERM,
4097                 .doit = nl80211_addset_beacon,
4098         },
4099         {
4100                 .cmd = NL80211_CMD_DEL_BEACON,
4101                 .policy = nl80211_policy,
4102                 .flags = GENL_ADMIN_PERM,
4103                 .doit = nl80211_del_beacon,
4104         },
4105         {
4106                 .cmd = NL80211_CMD_GET_STATION,
4107                 .doit = nl80211_get_station,
4108                 .dumpit = nl80211_dump_station,
4109                 .policy = nl80211_policy,
4110         },
4111         {
4112                 .cmd = NL80211_CMD_SET_STATION,
4113                 .doit = nl80211_set_station,
4114                 .policy = nl80211_policy,
4115                 .flags = GENL_ADMIN_PERM,
4116         },
4117         {
4118                 .cmd = NL80211_CMD_NEW_STATION,
4119                 .doit = nl80211_new_station,
4120                 .policy = nl80211_policy,
4121                 .flags = GENL_ADMIN_PERM,
4122         },
4123         {
4124                 .cmd = NL80211_CMD_DEL_STATION,
4125                 .doit = nl80211_del_station,
4126                 .policy = nl80211_policy,
4127                 .flags = GENL_ADMIN_PERM,
4128         },
4129         {
4130                 .cmd = NL80211_CMD_GET_MPATH,
4131                 .doit = nl80211_get_mpath,
4132                 .dumpit = nl80211_dump_mpath,
4133                 .policy = nl80211_policy,
4134                 .flags = GENL_ADMIN_PERM,
4135         },
4136         {
4137                 .cmd = NL80211_CMD_SET_MPATH,
4138                 .doit = nl80211_set_mpath,
4139                 .policy = nl80211_policy,
4140                 .flags = GENL_ADMIN_PERM,
4141         },
4142         {
4143                 .cmd = NL80211_CMD_NEW_MPATH,
4144                 .doit = nl80211_new_mpath,
4145                 .policy = nl80211_policy,
4146                 .flags = GENL_ADMIN_PERM,
4147         },
4148         {
4149                 .cmd = NL80211_CMD_DEL_MPATH,
4150                 .doit = nl80211_del_mpath,
4151                 .policy = nl80211_policy,
4152                 .flags = GENL_ADMIN_PERM,
4153         },
4154         {
4155                 .cmd = NL80211_CMD_SET_BSS,
4156                 .doit = nl80211_set_bss,
4157                 .policy = nl80211_policy,
4158                 .flags = GENL_ADMIN_PERM,
4159         },
4160         {
4161                 .cmd = NL80211_CMD_GET_REG,
4162                 .doit = nl80211_get_reg,
4163                 .policy = nl80211_policy,
4164                 /* can be retrieved by unprivileged users */
4165         },
4166         {
4167                 .cmd = NL80211_CMD_SET_REG,
4168                 .doit = nl80211_set_reg,
4169                 .policy = nl80211_policy,
4170                 .flags = GENL_ADMIN_PERM,
4171         },
4172         {
4173                 .cmd = NL80211_CMD_REQ_SET_REG,
4174                 .doit = nl80211_req_set_reg,
4175                 .policy = nl80211_policy,
4176                 .flags = GENL_ADMIN_PERM,
4177         },
4178         {
4179                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4180                 .doit = nl80211_get_mesh_params,
4181                 .policy = nl80211_policy,
4182                 /* can be retrieved by unprivileged users */
4183         },
4184         {
4185                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4186                 .doit = nl80211_set_mesh_params,
4187                 .policy = nl80211_policy,
4188                 .flags = GENL_ADMIN_PERM,
4189         },
4190         {
4191                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4192                 .doit = nl80211_trigger_scan,
4193                 .policy = nl80211_policy,
4194                 .flags = GENL_ADMIN_PERM,
4195         },
4196         {
4197                 .cmd = NL80211_CMD_GET_SCAN,
4198                 .policy = nl80211_policy,
4199                 .dumpit = nl80211_dump_scan,
4200         },
4201         {
4202                 .cmd = NL80211_CMD_AUTHENTICATE,
4203                 .doit = nl80211_authenticate,
4204                 .policy = nl80211_policy,
4205                 .flags = GENL_ADMIN_PERM,
4206         },
4207         {
4208                 .cmd = NL80211_CMD_ASSOCIATE,
4209                 .doit = nl80211_associate,
4210                 .policy = nl80211_policy,
4211                 .flags = GENL_ADMIN_PERM,
4212         },
4213         {
4214                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4215                 .doit = nl80211_deauthenticate,
4216                 .policy = nl80211_policy,
4217                 .flags = GENL_ADMIN_PERM,
4218         },
4219         {
4220                 .cmd = NL80211_CMD_DISASSOCIATE,
4221                 .doit = nl80211_disassociate,
4222                 .policy = nl80211_policy,
4223                 .flags = GENL_ADMIN_PERM,
4224         },
4225         {
4226                 .cmd = NL80211_CMD_JOIN_IBSS,
4227                 .doit = nl80211_join_ibss,
4228                 .policy = nl80211_policy,
4229                 .flags = GENL_ADMIN_PERM,
4230         },
4231         {
4232                 .cmd = NL80211_CMD_LEAVE_IBSS,
4233                 .doit = nl80211_leave_ibss,
4234                 .policy = nl80211_policy,
4235                 .flags = GENL_ADMIN_PERM,
4236         },
4237 #ifdef CONFIG_NL80211_TESTMODE
4238         {
4239                 .cmd = NL80211_CMD_TESTMODE,
4240                 .doit = nl80211_testmode_do,
4241                 .policy = nl80211_policy,
4242                 .flags = GENL_ADMIN_PERM,
4243         },
4244 #endif
4245         {
4246                 .cmd = NL80211_CMD_CONNECT,
4247                 .doit = nl80211_connect,
4248                 .policy = nl80211_policy,
4249                 .flags = GENL_ADMIN_PERM,
4250         },
4251         {
4252                 .cmd = NL80211_CMD_DISCONNECT,
4253                 .doit = nl80211_disconnect,
4254                 .policy = nl80211_policy,
4255                 .flags = GENL_ADMIN_PERM,
4256         },
4257         {
4258                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4259                 .doit = nl80211_wiphy_netns,
4260                 .policy = nl80211_policy,
4261                 .flags = GENL_ADMIN_PERM,
4262         },
4263 };
4264 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4265         .name = "mlme",
4266 };
4267
4268 /* multicast groups */
4269 static struct genl_multicast_group nl80211_config_mcgrp = {
4270         .name = "config",
4271 };
4272 static struct genl_multicast_group nl80211_scan_mcgrp = {
4273         .name = "scan",
4274 };
4275 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4276         .name = "regulatory",
4277 };
4278
4279 /* notification functions */
4280
4281 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4282 {
4283         struct sk_buff *msg;
4284
4285         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4286         if (!msg)
4287                 return;
4288
4289         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4290                 nlmsg_free(msg);
4291                 return;
4292         }
4293
4294         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4295                                 nl80211_config_mcgrp.id, GFP_KERNEL);
4296 }
4297
4298 static int nl80211_add_scan_req(struct sk_buff *msg,
4299                                 struct cfg80211_registered_device *rdev)
4300 {
4301         struct cfg80211_scan_request *req = rdev->scan_req;
4302         struct nlattr *nest;
4303         int i;
4304
4305         ASSERT_RDEV_LOCK(rdev);
4306
4307         if (WARN_ON(!req))
4308                 return 0;
4309
4310         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4311         if (!nest)
4312                 goto nla_put_failure;
4313         for (i = 0; i < req->n_ssids; i++)
4314                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4315         nla_nest_end(msg, nest);
4316
4317         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4318         if (!nest)
4319                 goto nla_put_failure;
4320         for (i = 0; i < req->n_channels; i++)
4321                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4322         nla_nest_end(msg, nest);
4323
4324         if (req->ie)
4325                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4326
4327         return 0;
4328  nla_put_failure:
4329         return -ENOBUFS;
4330 }
4331
4332 static int nl80211_send_scan_msg(struct sk_buff *msg,
4333                                  struct cfg80211_registered_device *rdev,
4334                                  struct net_device *netdev,
4335                                  u32 pid, u32 seq, int flags,
4336                                  u32 cmd)
4337 {
4338         void *hdr;
4339
4340         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4341         if (!hdr)
4342                 return -1;
4343
4344         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4345         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4346
4347         /* ignore errors and send incomplete event anyway */
4348         nl80211_add_scan_req(msg, rdev);
4349
4350         return genlmsg_end(msg, hdr);
4351
4352  nla_put_failure:
4353         genlmsg_cancel(msg, hdr);
4354         return -EMSGSIZE;
4355 }
4356
4357 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4358                              struct net_device *netdev)
4359 {
4360         struct sk_buff *msg;
4361
4362         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4363         if (!msg)
4364                 return;
4365
4366         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4367                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
4368                 nlmsg_free(msg);
4369                 return;
4370         }
4371
4372         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4373                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4374 }
4375
4376 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4377                             struct net_device *netdev)
4378 {
4379         struct sk_buff *msg;
4380
4381         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4382         if (!msg)
4383                 return;
4384
4385         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4386                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4387                 nlmsg_free(msg);
4388                 return;
4389         }
4390
4391         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4392                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4393 }
4394
4395 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4396                                struct net_device *netdev)
4397 {
4398         struct sk_buff *msg;
4399
4400         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4401         if (!msg)
4402                 return;
4403
4404         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4405                                   NL80211_CMD_SCAN_ABORTED) < 0) {
4406                 nlmsg_free(msg);
4407                 return;
4408         }
4409
4410         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4411                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4412 }
4413
4414 /*
4415  * This can happen on global regulatory changes or device specific settings
4416  * based on custom world regulatory domains.
4417  */
4418 void nl80211_send_reg_change_event(struct regulatory_request *request)
4419 {
4420         struct sk_buff *msg;
4421         void *hdr;
4422
4423         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4424         if (!msg)
4425                 return;
4426
4427         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
4428         if (!hdr) {
4429                 nlmsg_free(msg);
4430                 return;
4431         }
4432
4433         /* Userspace can always count this one always being set */
4434         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
4435
4436         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
4437                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4438                            NL80211_REGDOM_TYPE_WORLD);
4439         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
4440                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4441                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
4442         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
4443                  request->intersect)
4444                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4445                            NL80211_REGDOM_TYPE_INTERSECTION);
4446         else {
4447                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4448                            NL80211_REGDOM_TYPE_COUNTRY);
4449                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
4450         }
4451
4452         if (wiphy_idx_valid(request->wiphy_idx))
4453                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
4454
4455         if (genlmsg_end(msg, hdr) < 0) {
4456                 nlmsg_free(msg);
4457                 return;
4458         }
4459
4460         rcu_read_lock();
4461         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
4462                                 GFP_ATOMIC);
4463         rcu_read_unlock();
4464
4465         return;
4466
4467 nla_put_failure:
4468         genlmsg_cancel(msg, hdr);
4469         nlmsg_free(msg);
4470 }
4471
4472 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
4473                                     struct net_device *netdev,
4474                                     const u8 *buf, size_t len,
4475                                     enum nl80211_commands cmd, gfp_t gfp)
4476 {
4477         struct sk_buff *msg;
4478         void *hdr;
4479
4480         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4481         if (!msg)
4482                 return;
4483
4484         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4485         if (!hdr) {
4486                 nlmsg_free(msg);
4487                 return;
4488         }
4489
4490         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4491         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4492         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
4493
4494         if (genlmsg_end(msg, hdr) < 0) {
4495                 nlmsg_free(msg);
4496                 return;
4497         }
4498
4499         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4500                                 nl80211_mlme_mcgrp.id, gfp);
4501         return;
4502
4503  nla_put_failure:
4504         genlmsg_cancel(msg, hdr);
4505         nlmsg_free(msg);
4506 }
4507
4508 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
4509                           struct net_device *netdev, const u8 *buf,
4510                           size_t len, gfp_t gfp)
4511 {
4512         nl80211_send_mlme_event(rdev, netdev, buf, len,
4513                                 NL80211_CMD_AUTHENTICATE, gfp);
4514 }
4515
4516 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
4517                            struct net_device *netdev, const u8 *buf,
4518                            size_t len, gfp_t gfp)
4519 {
4520         nl80211_send_mlme_event(rdev, netdev, buf, len,
4521                                 NL80211_CMD_ASSOCIATE, gfp);
4522 }
4523
4524 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
4525                          struct net_device *netdev, const u8 *buf,
4526                          size_t len, gfp_t gfp)
4527 {
4528         nl80211_send_mlme_event(rdev, netdev, buf, len,
4529                                 NL80211_CMD_DEAUTHENTICATE, gfp);
4530 }
4531
4532 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
4533                            struct net_device *netdev, const u8 *buf,
4534                            size_t len, gfp_t gfp)
4535 {
4536         nl80211_send_mlme_event(rdev, netdev, buf, len,
4537                                 NL80211_CMD_DISASSOCIATE, gfp);
4538 }
4539
4540 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
4541                                       struct net_device *netdev, int cmd,
4542                                       const u8 *addr, gfp_t gfp)
4543 {
4544         struct sk_buff *msg;
4545         void *hdr;
4546
4547         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4548         if (!msg)
4549                 return;
4550
4551         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4552         if (!hdr) {
4553                 nlmsg_free(msg);
4554                 return;
4555         }
4556
4557         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4558         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4559         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
4560         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4561
4562         if (genlmsg_end(msg, hdr) < 0) {
4563                 nlmsg_free(msg);
4564                 return;
4565         }
4566
4567         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4568                                 nl80211_mlme_mcgrp.id, gfp);
4569         return;
4570
4571  nla_put_failure:
4572         genlmsg_cancel(msg, hdr);
4573         nlmsg_free(msg);
4574 }
4575
4576 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
4577                                struct net_device *netdev, const u8 *addr,
4578                                gfp_t gfp)
4579 {
4580         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
4581                                   addr, gfp);
4582 }
4583
4584 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
4585                                 struct net_device *netdev, const u8 *addr,
4586                                 gfp_t gfp)
4587 {
4588         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
4589                                   addr, gfp);
4590 }
4591
4592 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
4593                                  struct net_device *netdev, const u8 *bssid,
4594                                  const u8 *req_ie, size_t req_ie_len,
4595                                  const u8 *resp_ie, size_t resp_ie_len,
4596                                  u16 status, gfp_t gfp)
4597 {
4598         struct sk_buff *msg;
4599         void *hdr;
4600
4601         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4602         if (!msg)
4603                 return;
4604
4605         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
4606         if (!hdr) {
4607                 nlmsg_free(msg);
4608                 return;
4609         }
4610
4611         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4612         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4613         if (bssid)
4614                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4615         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
4616         if (req_ie)
4617                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4618         if (resp_ie)
4619                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4620
4621         if (genlmsg_end(msg, hdr) < 0) {
4622                 nlmsg_free(msg);
4623                 return;
4624         }
4625
4626         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4627                                 nl80211_mlme_mcgrp.id, gfp);
4628         return;
4629
4630  nla_put_failure:
4631         genlmsg_cancel(msg, hdr);
4632         nlmsg_free(msg);
4633
4634 }
4635
4636 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
4637                          struct net_device *netdev, const u8 *bssid,
4638                          const u8 *req_ie, size_t req_ie_len,
4639                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
4640 {
4641         struct sk_buff *msg;
4642         void *hdr;
4643
4644         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4645         if (!msg)
4646                 return;
4647
4648         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
4649         if (!hdr) {
4650                 nlmsg_free(msg);
4651                 return;
4652         }
4653
4654         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4655         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4656         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4657         if (req_ie)
4658                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4659         if (resp_ie)
4660                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4661
4662         if (genlmsg_end(msg, hdr) < 0) {
4663                 nlmsg_free(msg);
4664                 return;
4665         }
4666
4667         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4668                                 nl80211_mlme_mcgrp.id, gfp);
4669         return;
4670
4671  nla_put_failure:
4672         genlmsg_cancel(msg, hdr);
4673         nlmsg_free(msg);
4674
4675 }
4676
4677 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
4678                                struct net_device *netdev, u16 reason,
4679                                const u8 *ie, size_t ie_len, bool from_ap)
4680 {
4681         struct sk_buff *msg;
4682         void *hdr;
4683
4684         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4685         if (!msg)
4686                 return;
4687
4688         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
4689         if (!hdr) {
4690                 nlmsg_free(msg);
4691                 return;
4692         }
4693
4694         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4695         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4696         if (from_ap && reason)
4697                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
4698         if (from_ap)
4699                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
4700         if (ie)
4701                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
4702
4703         if (genlmsg_end(msg, hdr) < 0) {
4704                 nlmsg_free(msg);
4705                 return;
4706         }
4707
4708         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4709                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
4710         return;
4711
4712  nla_put_failure:
4713         genlmsg_cancel(msg, hdr);
4714         nlmsg_free(msg);
4715
4716 }
4717
4718 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
4719                              struct net_device *netdev, const u8 *bssid,
4720                              gfp_t gfp)
4721 {
4722         struct sk_buff *msg;
4723         void *hdr;
4724
4725         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4726         if (!msg)
4727                 return;
4728
4729         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
4730         if (!hdr) {
4731                 nlmsg_free(msg);
4732                 return;
4733         }
4734
4735         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4736         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4737         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4738
4739         if (genlmsg_end(msg, hdr) < 0) {
4740                 nlmsg_free(msg);
4741                 return;
4742         }
4743
4744         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4745                                 nl80211_mlme_mcgrp.id, gfp);
4746         return;
4747
4748  nla_put_failure:
4749         genlmsg_cancel(msg, hdr);
4750         nlmsg_free(msg);
4751 }
4752
4753 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
4754                                  struct net_device *netdev, const u8 *addr,
4755                                  enum nl80211_key_type key_type, int key_id,
4756                                  const u8 *tsc, gfp_t gfp)
4757 {
4758         struct sk_buff *msg;
4759         void *hdr;
4760
4761         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4762         if (!msg)
4763                 return;
4764
4765         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
4766         if (!hdr) {
4767                 nlmsg_free(msg);
4768                 return;
4769         }
4770
4771         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4772         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4773         if (addr)
4774                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4775         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
4776         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
4777         if (tsc)
4778                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
4779
4780         if (genlmsg_end(msg, hdr) < 0) {
4781                 nlmsg_free(msg);
4782                 return;
4783         }
4784
4785         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4786                                 nl80211_mlme_mcgrp.id, gfp);
4787         return;
4788
4789  nla_put_failure:
4790         genlmsg_cancel(msg, hdr);
4791         nlmsg_free(msg);
4792 }
4793
4794 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
4795                                     struct ieee80211_channel *channel_before,
4796                                     struct ieee80211_channel *channel_after)
4797 {
4798         struct sk_buff *msg;
4799         void *hdr;
4800         struct nlattr *nl_freq;
4801
4802         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4803         if (!msg)
4804                 return;
4805
4806         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
4807         if (!hdr) {
4808                 nlmsg_free(msg);
4809                 return;
4810         }
4811
4812         /*
4813          * Since we are applying the beacon hint to a wiphy we know its
4814          * wiphy_idx is valid
4815          */
4816         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
4817
4818         /* Before */
4819         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
4820         if (!nl_freq)
4821                 goto nla_put_failure;
4822         if (nl80211_msg_put_channel(msg, channel_before))
4823                 goto nla_put_failure;
4824         nla_nest_end(msg, nl_freq);
4825
4826         /* After */
4827         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
4828         if (!nl_freq)
4829                 goto nla_put_failure;
4830         if (nl80211_msg_put_channel(msg, channel_after))
4831                 goto nla_put_failure;
4832         nla_nest_end(msg, nl_freq);
4833
4834         if (genlmsg_end(msg, hdr) < 0) {
4835                 nlmsg_free(msg);
4836                 return;
4837         }
4838
4839         rcu_read_lock();
4840         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
4841                                 GFP_ATOMIC);
4842         rcu_read_unlock();
4843
4844         return;
4845
4846 nla_put_failure:
4847         genlmsg_cancel(msg, hdr);
4848         nlmsg_free(msg);
4849 }
4850
4851 /* initialisation/exit functions */
4852
4853 int nl80211_init(void)
4854 {
4855         int err;
4856
4857         err = genl_register_family_with_ops(&nl80211_fam,
4858                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
4859         if (err)
4860                 return err;
4861
4862         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
4863         if (err)
4864                 goto err_out;
4865
4866         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
4867         if (err)
4868                 goto err_out;
4869
4870         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
4871         if (err)
4872                 goto err_out;
4873
4874         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
4875         if (err)
4876                 goto err_out;
4877
4878 #ifdef CONFIG_NL80211_TESTMODE
4879         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
4880         if (err)
4881                 goto err_out;
4882 #endif
4883
4884         return 0;
4885  err_out:
4886         genl_unregister_family(&nl80211_fam);
4887         return err;
4888 }
4889
4890 void nl80211_exit(void)
4891 {
4892         genl_unregister_family(&nl80211_fam);
4893 }