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

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2009  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/list.h>
  11 #include <linux/if_ether.h>
  12 #include <linux/ieee80211.h>
  13 #include <linux/nl80211.h>
  14 #include <linux/rtnetlink.h>
  15 #include <linux/netlink.h>
  16 #include <linux/etherdevice.h>
  17 #include <net/net_namespace.h>
  18 #include <net/genetlink.h>
  19 #include <net/cfg80211.h>
  20 #include <net/sock.h>
  21 #include "core.h"
  22 #include "nl80211.h"
  23 #include "reg.h"
  24
  25 /* the netlink family */
  26 static struct genl_family nl80211_fam = {
  27         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  28         .name = "nl80211",      /* have users key off the name instead */
  29         .hdrsize = 0,           /* no private header */
  30         .version = 1,           /* no particular meaning now */
  31         .maxattr = NL80211_ATTR_MAX,
  32         .netnsok = true,
  33 };
  34
  35 /* internal helper: get rdev and dev */
  36 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  37                                        struct cfg80211_registered_device **rdev,
  38                                        struct net_device **dev)
  39 {
  40         struct nlattr **attrs = info->attrs;
  41         int ifindex;
  42
  43         if (!attrs[NL80211_ATTR_IFINDEX])
  44                 return -EINVAL;
  45
  46         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  47         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  48         if (!*dev)
  49                 return -ENODEV;
  50
  51         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  52         if (IS_ERR(*rdev)) {
  53                 dev_put(*dev);
  54                 return PTR_ERR(*rdev);
  55         }
  56
  57         return 0;
  58 }
  59
  60 /* policy for the attributes */
  61 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
  62         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  63         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  64                                       .len = 20-1 },
  65         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  66         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  67         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  69         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  72
  73         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  74         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  75         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  76
  77         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  78         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  79
  80         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  81         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  82                                     .len = WLAN_MAX_KEY_LEN },
  83         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  84         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  85         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  86         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  87
  88         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  89         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  90         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  91                                        .len = IEEE80211_MAX_DATA_LEN },
  92         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  93                                        .len = IEEE80211_MAX_DATA_LEN },
  94         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  95         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  96         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  97         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  98                                                .len = NL80211_MAX_SUPP_RATES },
  99         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 100         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 101         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 102         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 103                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 104         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 105
 106         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 107         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 108
 109         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 110         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 111         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 113                                            .len = NL80211_MAX_SUPP_RATES },
 114
 115         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 116
 117         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 118                                          .len = NL80211_HT_CAPABILITY_LEN },
 119
 120         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 121         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 122                               .len = IEEE80211_MAX_DATA_LEN },
 123         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 124         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 125
 126         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 127                                 .len = IEEE80211_MAX_SSID_LEN },
 128         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 129         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 130         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 131         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 132         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 133         [NL80211_ATTR_STA_FLAGS2] = {
 134                 .len = sizeof(struct nl80211_sta_flag_update),
 135         },
 136         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 137         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 138         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 139         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 140         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 141 };
 142
 143 /* policy for the attributes */
 144 static struct nla_policy
 145 nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
 146         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 147         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 148         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 149         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 150         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 151         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 152 };
 153
 154 /* IE validation */
 155 static bool is_valid_ie_attr(const struct nlattr *attr)
 156 {
 157         const u8 *pos;
 158         int len;
 159
 160         if (!attr)
 161                 return true;
 162
 163         pos = nla_data(attr);
 164         len = nla_len(attr);
 165
 166         while (len) {
 167                 u8 elemlen;
 168
 169                 if (len < 2)
 170                         return false;
 171                 len -= 2;
 172
 173                 elemlen = pos[1];
 174                 if (elemlen > len)
 175                         return false;
 176
 177                 len -= elemlen;
 178                 pos += 2 + elemlen;
 179         }
 180
 181         return true;
 182 }
 183
 184 /* message building helper */
 185 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 186                                    int flags, u8 cmd)
 187 {
 188         /* since there is no private header just add the generic one */
 189         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 190 }
 191
 192 static int nl80211_msg_put_channel(struct sk_buff *msg,
 193                                    struct ieee80211_channel *chan)
 194 {
 195         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 196                     chan->center_freq);
 197
 198         if (chan->flags & IEEE80211_CHAN_DISABLED)
 199                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 200         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 201                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 202         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 203                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 204         if (chan->flags & IEEE80211_CHAN_RADAR)
 205                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 206
 207         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 208                     DBM_TO_MBM(chan->max_power));
 209
 210         return 0;
 211
 212  nla_put_failure:
 213         return -ENOBUFS;
 214 }
 215
 216 /* netlink command implementations */
 217
 218 struct key_parse {
 219         struct key_params p;
 220         int idx;
 221         bool def, defmgmt;
 222 };
 223
 224 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 225 {
 226         struct nlattr *tb[NL80211_KEY_MAX + 1];
 227         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 228                                    nl80211_key_policy);
 229         if (err)
 230                 return err;
 231
 232         k->def = !!tb[NL80211_KEY_DEFAULT];
 233         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 234
 235         if (tb[NL80211_KEY_IDX])
 236                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 237
 238         if (tb[NL80211_KEY_DATA]) {
 239                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 240                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 241         }
 242
 243         if (tb[NL80211_KEY_SEQ]) {
 244                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 245                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 246         }
 247
 248         if (tb[NL80211_KEY_CIPHER])
 249                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 250
 251         return 0;
 252 }
 253
 254 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 255 {
 256         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 257                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 258                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 259         }
 260
 261         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 262                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 263                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 264         }
 265
 266         if (info->attrs[NL80211_ATTR_KEY_IDX])
 267                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 268
 269         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 270                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 271
 272         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 273         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 274
 275         return 0;
 276 }
 277
 278 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 279 {
 280         int err;
 281
 282         memset(k, 0, sizeof(*k));
 283         k->idx = -1;
 284
 285         if (info->attrs[NL80211_ATTR_KEY])
 286                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 287         else
 288                 err = nl80211_parse_key_old(info, k);
 289
 290         if (err)
 291                 return err;
 292
 293         if (k->def && k->defmgmt)
 294                 return -EINVAL;
 295
 296         if (k->idx != -1) {
 297                 if (k->defmgmt) {
 298                         if (k->idx < 4 || k->idx > 5)
 299                                 return -EINVAL;
 300                 } else if (k->def) {
 301                         if (k->idx < 0 || k->idx > 3)
 302                                 return -EINVAL;
 303                 } else {
 304                         if (k->idx < 0 || k->idx > 5)
 305                                 return -EINVAL;
 306                 }
 307         }
 308
 309         return 0;
 310 }
 311
 312 static struct cfg80211_cached_keys *
 313 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 314                        struct nlattr *keys)
 315 {
 316         struct key_parse parse;
 317         struct nlattr *key;
 318         struct cfg80211_cached_keys *result;
 319         int rem, err, def = 0;
 320
 321         result = kzalloc(sizeof(*result), GFP_KERNEL);
 322         if (!result)
 323                 return ERR_PTR(-ENOMEM);
 324
 325         result->def = -1;
 326         result->defmgmt = -1;
 327
 328         nla_for_each_nested(key, keys, rem) {
 329                 memset(&parse, 0, sizeof(parse));
 330                 parse.idx = -1;
 331
 332                 err = nl80211_parse_key_new(key, &parse);
 333                 if (err)
 334                         goto error;
 335                 err = -EINVAL;
 336                 if (!parse.p.key)
 337                         goto error;
 338                 if (parse.idx < 0 || parse.idx > 4)
 339                         goto error;
 340                 if (parse.def) {
 341                         if (def)
 342                                 goto error;
 343                         def = 1;
 344                         result->def = parse.idx;
 345                 } else if (parse.defmgmt)
 346                         goto error;
 347                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 348                                                      parse.idx, NULL);
 349                 if (err)
 350                         goto error;
 351                 result->params[parse.idx].cipher = parse.p.cipher;
 352                 result->params[parse.idx].key_len = parse.p.key_len;
 353                 result->params[parse.idx].key = result->data[parse.idx];
 354                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 355         }
 356
 357         return result;
 358  error:
 359         kfree(result);
 360         return ERR_PTR(err);
 361 }
 362
 363 static int nl80211_key_allowed(struct wireless_dev *wdev)
 364 {
 365         ASSERT_WDEV_LOCK(wdev);
 366
 367         if (!netif_running(wdev->netdev))
 368                 return -ENETDOWN;
 369
 370         switch (wdev->iftype) {
 371         case NL80211_IFTYPE_AP:
 372         case NL80211_IFTYPE_AP_VLAN:
 373                 break;
 374         case NL80211_IFTYPE_ADHOC:
 375                 if (!wdev->current_bss)
 376                         return -ENOLINK;
 377                 break;
 378         case NL80211_IFTYPE_STATION:
 379                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 380                         return -ENOLINK;
 381                 break;
 382         default:
 383                 return -EINVAL;
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 390                               struct cfg80211_registered_device *dev)
 391 {
 392         void *hdr;
 393         struct nlattr *nl_bands, *nl_band;
 394         struct nlattr *nl_freqs, *nl_freq;
 395         struct nlattr *nl_rates, *nl_rate;
 396         struct nlattr *nl_modes;
 397         struct nlattr *nl_cmds;
 398         enum ieee80211_band band;
 399         struct ieee80211_channel *chan;
 400         struct ieee80211_rate *rate;
 401         int i;
 402         u16 ifmodes = dev->wiphy.interface_modes;
 403
 404         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 405         if (!hdr)
 406                 return -1;
 407
 408         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 409         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 410
 411         NLA_PUT_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, 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 (!rdev->ops->change_virtual_intf ||
 981             !(rdev->wiphy.interface_modes & (1 << ntype))) {
 982                 err = -EOPNOTSUPP;
 983                 goto unlock;
 984         }
 985
 986         if (info->attrs[NL80211_ATTR_MESH_ID]) {
 987                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
 988                         err = -EINVAL;
 989                         goto unlock;
 990                 }
 991                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
 992                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
 993                 change = true;
 994         }
 995
 996         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
 997                 if (ntype != NL80211_IFTYPE_MONITOR) {
 998                         err = -EINVAL;
 999                         goto unlock;
1000                 }
1001                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1002                                           &_flags);
1003                 if (err)
1004                         goto unlock;
1005
1006                 flags = &_flags;
1007                 change = true;
1008         }
1009
1010         if (change)
1011                 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev,
1012                                                     ntype, flags, &params);
1013         else
1014                 err = 0;
1015
1016         WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
1017
1018         if (!err && (ntype != otype)) {
1019                 if (otype == NL80211_IFTYPE_ADHOC)
1020                         cfg80211_clear_ibss(dev, false);
1021         }
1022
1023  unlock:
1024         dev_put(dev);
1025         cfg80211_unlock_rdev(rdev);
1026  unlock_rtnl:
1027         rtnl_unlock();
1028         return err;
1029 }
1030
1031 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1032 {
1033         struct cfg80211_registered_device *rdev;
1034         struct vif_params params;
1035         int err;
1036         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1037         u32 flags;
1038
1039         memset(&params, 0, sizeof(params));
1040
1041         if (!info->attrs[NL80211_ATTR_IFNAME])
1042                 return -EINVAL;
1043
1044         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1045                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1046                 if (type > NL80211_IFTYPE_MAX)
1047                         return -EINVAL;
1048         }
1049
1050         rtnl_lock();
1051
1052         rdev = cfg80211_get_dev_from_info(info);
1053         if (IS_ERR(rdev)) {
1054                 err = PTR_ERR(rdev);
1055                 goto unlock_rtnl;
1056         }
1057
1058         if (!rdev->ops->add_virtual_intf ||
1059             !(rdev->wiphy.interface_modes & (1 << type))) {
1060                 err = -EOPNOTSUPP;
1061                 goto unlock;
1062         }
1063
1064         if (type == NL80211_IFTYPE_MESH_POINT &&
1065             info->attrs[NL80211_ATTR_MESH_ID]) {
1066                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1067                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1068         }
1069
1070         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1071                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1072                                   &flags);
1073         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1074                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1075                 type, err ? NULL : &flags, &params);
1076
1077  unlock:
1078         cfg80211_unlock_rdev(rdev);
1079  unlock_rtnl:
1080         rtnl_unlock();
1081         return err;
1082 }
1083
1084 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1085 {
1086         struct cfg80211_registered_device *rdev;
1087         int err;
1088         struct net_device *dev;
1089
1090         rtnl_lock();
1091
1092         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1093         if (err)
1094                 goto unlock_rtnl;
1095
1096         if (!rdev->ops->del_virtual_intf) {
1097                 err = -EOPNOTSUPP;
1098                 goto out;
1099         }
1100
1101         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1102
1103  out:
1104         cfg80211_unlock_rdev(rdev);
1105         dev_put(dev);
1106  unlock_rtnl:
1107         rtnl_unlock();
1108         return err;
1109 }
1110
1111 struct get_key_cookie {
1112         struct sk_buff *msg;
1113         int error;
1114         int idx;
1115 };
1116
1117 static void get_key_callback(void *c, struct key_params *params)
1118 {
1119         struct nlattr *key;
1120         struct get_key_cookie *cookie = c;
1121
1122         if (params->key)
1123                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1124                         params->key_len, params->key);
1125
1126         if (params->seq)
1127                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1128                         params->seq_len, params->seq);
1129
1130         if (params->cipher)
1131                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1132                             params->cipher);
1133
1134         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1135         if (!key)
1136                 goto nla_put_failure;
1137
1138         if (params->key)
1139                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1140                         params->key_len, params->key);
1141
1142         if (params->seq)
1143                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1144                         params->seq_len, params->seq);
1145
1146         if (params->cipher)
1147                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1148                             params->cipher);
1149
1150         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1151
1152         nla_nest_end(cookie->msg, key);
1153
1154         return;
1155  nla_put_failure:
1156         cookie->error = 1;
1157 }
1158
1159 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1160 {
1161         struct cfg80211_registered_device *rdev;
1162         int err;
1163         struct net_device *dev;
1164         u8 key_idx = 0;
1165         u8 *mac_addr = NULL;
1166         struct get_key_cookie cookie = {
1167                 .error = 0,
1168         };
1169         void *hdr;
1170         struct sk_buff *msg;
1171
1172         if (info->attrs[NL80211_ATTR_KEY_IDX])
1173                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1174
1175         if (key_idx > 5)
1176                 return -EINVAL;
1177
1178         if (info->attrs[NL80211_ATTR_MAC])
1179                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1180
1181         rtnl_lock();
1182
1183         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1184         if (err)
1185                 goto unlock_rtnl;
1186
1187         if (!rdev->ops->get_key) {
1188                 err = -EOPNOTSUPP;
1189                 goto out;
1190         }
1191
1192         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1193         if (!msg) {
1194                 err = -ENOMEM;
1195                 goto out;
1196         }
1197
1198         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1199                              NL80211_CMD_NEW_KEY);
1200
1201         if (IS_ERR(hdr)) {
1202                 err = PTR_ERR(hdr);
1203                 goto free_msg;
1204         }
1205
1206         cookie.msg = msg;
1207         cookie.idx = key_idx;
1208
1209         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1210         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1211         if (mac_addr)
1212                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1213
1214         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1215                                 &cookie, get_key_callback);
1216
1217         if (err)
1218                 goto free_msg;
1219
1220         if (cookie.error)
1221                 goto nla_put_failure;
1222
1223         genlmsg_end(msg, hdr);
1224         err = genlmsg_reply(msg, info);
1225         goto out;
1226
1227  nla_put_failure:
1228         err = -ENOBUFS;
1229  free_msg:
1230         nlmsg_free(msg);
1231  out:
1232         cfg80211_unlock_rdev(rdev);
1233         dev_put(dev);
1234  unlock_rtnl:
1235         rtnl_unlock();
1236
1237         return err;
1238 }
1239
1240 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1241 {
1242         struct cfg80211_registered_device *rdev;
1243         struct key_parse key;
1244         int err;
1245         struct net_device *dev;
1246         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1247                     u8 key_index);
1248
1249         err = nl80211_parse_key(info, &key);
1250         if (err)
1251                 return err;
1252
1253         if (key.idx < 0)
1254                 return -EINVAL;
1255
1256         /* only support setting default key */
1257         if (!key.def && !key.defmgmt)
1258                 return -EINVAL;
1259
1260         rtnl_lock();
1261
1262         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1263         if (err)
1264                 goto unlock_rtnl;
1265
1266         if (key.def)
1267                 func = rdev->ops->set_default_key;
1268         else
1269                 func = rdev->ops->set_default_mgmt_key;
1270
1271         if (!func) {
1272                 err = -EOPNOTSUPP;
1273                 goto out;
1274         }
1275
1276         wdev_lock(dev->ieee80211_ptr);
1277         err = nl80211_key_allowed(dev->ieee80211_ptr);
1278         if (!err)
1279                 err = func(&rdev->wiphy, dev, key.idx);
1280
1281 #ifdef CONFIG_WIRELESS_EXT
1282         if (!err) {
1283                 if (func == rdev->ops->set_default_key)
1284                         dev->ieee80211_ptr->wext.default_key = key.idx;
1285                 else
1286                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1287         }
1288 #endif
1289         wdev_unlock(dev->ieee80211_ptr);
1290
1291  out:
1292         cfg80211_unlock_rdev(rdev);
1293         dev_put(dev);
1294
1295  unlock_rtnl:
1296         rtnl_unlock();
1297
1298         return err;
1299 }
1300
1301 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1302 {
1303         struct cfg80211_registered_device *rdev;
1304         int err;
1305         struct net_device *dev;
1306         struct key_parse key;
1307         u8 *mac_addr = NULL;
1308
1309         err = nl80211_parse_key(info, &key);
1310         if (err)
1311                 return err;
1312
1313         if (!key.p.key)
1314                 return -EINVAL;
1315
1316         if (info->attrs[NL80211_ATTR_MAC])
1317                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1318
1319         rtnl_lock();
1320
1321         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1322         if (err)
1323                 goto unlock_rtnl;
1324
1325         if (!rdev->ops->add_key) {
1326                 err = -EOPNOTSUPP;
1327                 goto out;
1328         }
1329
1330         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1331                 err = -EINVAL;
1332                 goto out;
1333         }
1334
1335         wdev_lock(dev->ieee80211_ptr);
1336         err = nl80211_key_allowed(dev->ieee80211_ptr);
1337         if (!err)
1338                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1339                                          mac_addr, &key.p);
1340         wdev_unlock(dev->ieee80211_ptr);
1341
1342  out:
1343         cfg80211_unlock_rdev(rdev);
1344         dev_put(dev);
1345  unlock_rtnl:
1346         rtnl_unlock();
1347
1348         return err;
1349 }
1350
1351 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1352 {
1353         struct cfg80211_registered_device *rdev;
1354         int err;
1355         struct net_device *dev;
1356         u8 *mac_addr = NULL;
1357         struct key_parse key;
1358
1359         err = nl80211_parse_key(info, &key);
1360         if (err)
1361                 return err;
1362
1363         if (info->attrs[NL80211_ATTR_MAC])
1364                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1365
1366         rtnl_lock();
1367
1368         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1369         if (err)
1370                 goto unlock_rtnl;
1371
1372         if (!rdev->ops->del_key) {
1373                 err = -EOPNOTSUPP;
1374                 goto out;
1375         }
1376
1377         wdev_lock(dev->ieee80211_ptr);
1378         err = nl80211_key_allowed(dev->ieee80211_ptr);
1379         if (!err)
1380                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1381
1382 #ifdef CONFIG_WIRELESS_EXT
1383         if (!err) {
1384                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1385                         dev->ieee80211_ptr->wext.default_key = -1;
1386                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1387                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1388         }
1389 #endif
1390         wdev_unlock(dev->ieee80211_ptr);
1391
1392  out:
1393         cfg80211_unlock_rdev(rdev);
1394         dev_put(dev);
1395
1396  unlock_rtnl:
1397         rtnl_unlock();
1398
1399         return err;
1400 }
1401
1402 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1403 {
1404         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1405                     struct beacon_parameters *info);
1406         struct cfg80211_registered_device *rdev;
1407         int err;
1408         struct net_device *dev;
1409         struct beacon_parameters params;
1410         int haveinfo = 0;
1411
1412         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1413                 return -EINVAL;
1414
1415         rtnl_lock();
1416
1417         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1418         if (err)
1419                 goto unlock_rtnl;
1420
1421         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1422                 err = -EOPNOTSUPP;
1423                 goto out;
1424         }
1425
1426         switch (info->genlhdr->cmd) {
1427         case NL80211_CMD_NEW_BEACON:
1428                 /* these are required for NEW_BEACON */
1429                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1430                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1431                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1432                         err = -EINVAL;
1433                         goto out;
1434                 }
1435
1436                 call = rdev->ops->add_beacon;
1437                 break;
1438         case NL80211_CMD_SET_BEACON:
1439                 call = rdev->ops->set_beacon;
1440                 break;
1441         default:
1442                 WARN_ON(1);
1443                 err = -EOPNOTSUPP;
1444                 goto out;
1445         }
1446
1447         if (!call) {
1448                 err = -EOPNOTSUPP;
1449                 goto out;
1450         }
1451
1452         memset(&params, 0, sizeof(params));
1453
1454         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1455                 params.interval =
1456                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1457                 haveinfo = 1;
1458         }
1459
1460         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1461                 params.dtim_period =
1462                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1463                 haveinfo = 1;
1464         }
1465
1466         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1467                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1468                 params.head_len =
1469                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1470                 haveinfo = 1;
1471         }
1472
1473         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1474                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1475                 params.tail_len =
1476                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1477                 haveinfo = 1;
1478         }
1479
1480         if (!haveinfo) {
1481                 err = -EINVAL;
1482                 goto out;
1483         }
1484
1485         err = call(&rdev->wiphy, dev, &params);
1486
1487  out:
1488         cfg80211_unlock_rdev(rdev);
1489         dev_put(dev);
1490  unlock_rtnl:
1491         rtnl_unlock();
1492
1493         return err;
1494 }
1495
1496 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1497 {
1498         struct cfg80211_registered_device *rdev;
1499         int err;
1500         struct net_device *dev;
1501
1502         rtnl_lock();
1503
1504         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1505         if (err)
1506                 goto unlock_rtnl;
1507
1508         if (!rdev->ops->del_beacon) {
1509                 err = -EOPNOTSUPP;
1510                 goto out;
1511         }
1512
1513         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1514                 err = -EOPNOTSUPP;
1515                 goto out;
1516         }
1517         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1518
1519  out:
1520         cfg80211_unlock_rdev(rdev);
1521         dev_put(dev);
1522  unlock_rtnl:
1523         rtnl_unlock();
1524
1525         return err;
1526 }
1527
1528 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1529         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1530         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1531         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1532         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1533 };
1534
1535 static int parse_station_flags(struct genl_info *info,
1536                                struct station_parameters *params)
1537 {
1538         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1539         struct nlattr *nla;
1540         int flag;
1541
1542         /*
1543          * Try parsing the new attribute first so userspace
1544          * can specify both for older kernels.
1545          */
1546         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1547         if (nla) {
1548                 struct nl80211_sta_flag_update *sta_flags;
1549
1550                 sta_flags = nla_data(nla);
1551                 params->sta_flags_mask = sta_flags->mask;
1552                 params->sta_flags_set = sta_flags->set;
1553                 if ((params->sta_flags_mask |
1554                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1555                         return -EINVAL;
1556                 return 0;
1557         }
1558
1559         /* if present, parse the old attribute */
1560
1561         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1562         if (!nla)
1563                 return 0;
1564
1565         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1566                              nla, sta_flags_policy))
1567                 return -EINVAL;
1568
1569         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1570         params->sta_flags_mask &= ~1;
1571
1572         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1573                 if (flags[flag])
1574                         params->sta_flags_set |= (1<<flag);
1575
1576         return 0;
1577 }
1578
1579 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1580 {
1581         int modulation, streams, bitrate;
1582
1583         if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1584                 return rate->legacy;
1585
1586         /* the formula below does only work for MCS values smaller than 32 */
1587         if (rate->mcs >= 32)
1588                 return 0;
1589
1590         modulation = rate->mcs & 7;
1591         streams = (rate->mcs >> 3) + 1;
1592
1593         bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1594                         13500000 : 6500000;
1595
1596         if (modulation < 4)
1597                 bitrate *= (modulation + 1);
1598         else if (modulation == 4)
1599                 bitrate *= (modulation + 2);
1600         else
1601                 bitrate *= (modulation + 3);
1602
1603         bitrate *= streams;
1604
1605         if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1606                 bitrate = (bitrate / 9) * 10;
1607
1608         /* do NOT round down here */
1609         return (bitrate + 50000) / 100000;
1610 }
1611
1612 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1613                                 int flags, struct net_device *dev,
1614                                 u8 *mac_addr, struct station_info *sinfo)
1615 {
1616         void *hdr;
1617         struct nlattr *sinfoattr, *txrate;
1618         u16 bitrate;
1619
1620         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1621         if (!hdr)
1622                 return -1;
1623
1624         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1625         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1626
1627         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1628
1629         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1630         if (!sinfoattr)
1631                 goto nla_put_failure;
1632         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1633                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1634                             sinfo->inactive_time);
1635         if (sinfo->filled & STATION_INFO_RX_BYTES)
1636                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1637                             sinfo->rx_bytes);
1638         if (sinfo->filled & STATION_INFO_TX_BYTES)
1639                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1640                             sinfo->tx_bytes);
1641         if (sinfo->filled & STATION_INFO_LLID)
1642                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1643                             sinfo->llid);
1644         if (sinfo->filled & STATION_INFO_PLID)
1645                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1646                             sinfo->plid);
1647         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1648                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1649                             sinfo->plink_state);
1650         if (sinfo->filled & STATION_INFO_SIGNAL)
1651                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1652                            sinfo->signal);
1653         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1654                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1655                 if (!txrate)
1656                         goto nla_put_failure;
1657
1658                 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1659                 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1660                 if (bitrate > 0)
1661                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1662
1663                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1664                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1665                                     sinfo->txrate.mcs);
1666                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1667                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1668                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1669                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1670
1671                 nla_nest_end(msg, txrate);
1672         }
1673         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1674                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1675                             sinfo->rx_packets);
1676         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1677                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1678                             sinfo->tx_packets);
1679         nla_nest_end(msg, sinfoattr);
1680
1681         return genlmsg_end(msg, hdr);
1682
1683  nla_put_failure:
1684         genlmsg_cancel(msg, hdr);
1685         return -EMSGSIZE;
1686 }
1687
1688 static int nl80211_dump_station(struct sk_buff *skb,
1689                                 struct netlink_callback *cb)
1690 {
1691         struct station_info sinfo;
1692         struct cfg80211_registered_device *dev;
1693         struct net_device *netdev;
1694         u8 mac_addr[ETH_ALEN];
1695         int ifidx = cb->args[0];
1696         int sta_idx = cb->args[1];
1697         int err;
1698
1699         if (!ifidx) {
1700                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1701                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1702                                   nl80211_policy);
1703                 if (err)
1704                         return err;
1705
1706                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1707                         return -EINVAL;
1708
1709                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1710                 if (!ifidx)
1711                         return -EINVAL;
1712         }
1713
1714         rtnl_lock();
1715
1716         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1717         if (!netdev) {
1718                 err = -ENODEV;
1719                 goto out_rtnl;
1720         }
1721
1722         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1723         if (IS_ERR(dev)) {
1724                 err = PTR_ERR(dev);
1725                 goto out_rtnl;
1726         }
1727
1728         if (!dev->ops->dump_station) {
1729                 err = -EOPNOTSUPP;
1730                 goto out_err;
1731         }
1732
1733         while (1) {
1734                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1735                                              mac_addr, &sinfo);
1736                 if (err == -ENOENT)
1737                         break;
1738                 if (err)
1739                         goto out_err;
1740
1741                 if (nl80211_send_station(skb,
1742                                 NETLINK_CB(cb->skb).pid,
1743                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1744                                 netdev, mac_addr,
1745                                 &sinfo) < 0)
1746                         goto out;
1747
1748                 sta_idx++;
1749         }
1750
1751
1752  out:
1753         cb->args[1] = sta_idx;
1754         err = skb->len;
1755  out_err:
1756         cfg80211_unlock_rdev(dev);
1757  out_rtnl:
1758         rtnl_unlock();
1759
1760         return err;
1761 }
1762
1763 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1764 {
1765         struct cfg80211_registered_device *rdev;
1766         int err;
1767         struct net_device *dev;
1768         struct station_info sinfo;
1769         struct sk_buff *msg;
1770         u8 *mac_addr = NULL;
1771
1772         memset(&sinfo, 0, sizeof(sinfo));
1773
1774         if (!info->attrs[NL80211_ATTR_MAC])
1775                 return -EINVAL;
1776
1777         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1778
1779         rtnl_lock();
1780
1781         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1782         if (err)
1783                 goto out_rtnl;
1784
1785         if (!rdev->ops->get_station) {
1786                 err = -EOPNOTSUPP;
1787                 goto out;
1788         }
1789
1790         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1791         if (err)
1792                 goto out;
1793
1794         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1795         if (!msg)
1796                 goto out;
1797
1798         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1799                                  dev, mac_addr, &sinfo) < 0)
1800                 goto out_free;
1801
1802         err = genlmsg_reply(msg, info);
1803         goto out;
1804
1805  out_free:
1806         nlmsg_free(msg);
1807  out:
1808         cfg80211_unlock_rdev(rdev);
1809         dev_put(dev);
1810  out_rtnl:
1811         rtnl_unlock();
1812
1813         return err;
1814 }
1815
1816 /*
1817  * Get vlan interface making sure it is on the right wiphy.
1818  */
1819 static int get_vlan(struct genl_info *info,
1820                     struct cfg80211_registered_device *rdev,
1821                     struct net_device **vlan)
1822 {
1823         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1824         *vlan = NULL;
1825
1826         if (vlanattr) {
1827                 *vlan = dev_get_by_index(genl_info_net(info),
1828                                          nla_get_u32(vlanattr));
1829                 if (!*vlan)
1830                         return -ENODEV;
1831                 if (!(*vlan)->ieee80211_ptr)
1832                         return -EINVAL;
1833                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1834                         return -EINVAL;
1835         }
1836         return 0;
1837 }
1838
1839 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1840 {
1841         struct cfg80211_registered_device *rdev;
1842         int err;
1843         struct net_device *dev;
1844         struct station_parameters params;
1845         u8 *mac_addr = NULL;
1846
1847         memset(&params, 0, sizeof(params));
1848
1849         params.listen_interval = -1;
1850
1851         if (info->attrs[NL80211_ATTR_STA_AID])
1852                 return -EINVAL;
1853
1854         if (!info->attrs[NL80211_ATTR_MAC])
1855                 return -EINVAL;
1856
1857         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1858
1859         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1860                 params.supported_rates =
1861                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1862                 params.supported_rates_len =
1863                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1864         }
1865
1866         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1867                 params.listen_interval =
1868                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1869
1870         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1871                 params.ht_capa =
1872                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1873
1874         if (parse_station_flags(info, &params))
1875                 return -EINVAL;
1876
1877         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1878                 params.plink_action =
1879                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1880
1881         rtnl_lock();
1882
1883         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1884         if (err)
1885                 goto out_rtnl;
1886
1887         err = get_vlan(info, rdev, &params.vlan);
1888         if (err)
1889                 goto out;
1890
1891         /* validate settings */
1892         err = 0;
1893
1894         switch (dev->ieee80211_ptr->iftype) {
1895         case NL80211_IFTYPE_AP:
1896         case NL80211_IFTYPE_AP_VLAN:
1897                 /* disallow mesh-specific things */
1898                 if (params.plink_action)
1899                         err = -EINVAL;
1900                 break;
1901         case NL80211_IFTYPE_STATION:
1902                 /* disallow everything but AUTHORIZED flag */
1903                 if (params.plink_action)
1904                         err = -EINVAL;
1905                 if (params.vlan)
1906                         err = -EINVAL;
1907                 if (params.supported_rates)
1908                         err = -EINVAL;
1909                 if (params.ht_capa)
1910                         err = -EINVAL;
1911                 if (params.listen_interval >= 0)
1912                         err = -EINVAL;
1913                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1914                         err = -EINVAL;
1915                 break;
1916         case NL80211_IFTYPE_MESH_POINT:
1917                 /* disallow things mesh doesn't support */
1918                 if (params.vlan)
1919                         err = -EINVAL;
1920                 if (params.ht_capa)
1921                         err = -EINVAL;
1922                 if (params.listen_interval >= 0)
1923                         err = -EINVAL;
1924                 if (params.supported_rates)
1925                         err = -EINVAL;
1926                 if (params.sta_flags_mask)
1927                         err = -EINVAL;
1928                 break;
1929         default:
1930                 err = -EINVAL;
1931         }
1932
1933         if (err)
1934                 goto out;
1935
1936         if (!rdev->ops->change_station) {
1937                 err = -EOPNOTSUPP;
1938                 goto out;
1939         }
1940
1941         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1942
1943  out:
1944         if (params.vlan)
1945                 dev_put(params.vlan);
1946         cfg80211_unlock_rdev(rdev);
1947         dev_put(dev);
1948  out_rtnl:
1949         rtnl_unlock();
1950
1951         return err;
1952 }
1953
1954 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1955 {
1956         struct cfg80211_registered_device *rdev;
1957         int err;
1958         struct net_device *dev;
1959         struct station_parameters params;
1960         u8 *mac_addr = NULL;
1961
1962         memset(&params, 0, sizeof(params));
1963
1964         if (!info->attrs[NL80211_ATTR_MAC])
1965                 return -EINVAL;
1966
1967         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1968                 return -EINVAL;
1969
1970         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1971                 return -EINVAL;
1972
1973         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1974         params.supported_rates =
1975                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1976         params.supported_rates_len =
1977                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1978         params.listen_interval =
1979                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1980
1981         if (info->attrs[NL80211_ATTR_STA_AID]) {
1982                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1983                 if (!params.aid || params.aid > IEEE80211_MAX_AID)
1984                         return -EINVAL;
1985         }
1986
1987         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1988                 params.ht_capa =
1989                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1990
1991         if (parse_station_flags(info, &params))
1992                 return -EINVAL;
1993
1994         rtnl_lock();
1995
1996         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1997         if (err)
1998                 goto out_rtnl;
1999
2000         err = get_vlan(info, rdev, &params.vlan);
2001         if (err)
2002                 goto out;
2003
2004         /* validate settings */
2005         err = 0;
2006
2007         switch (dev->ieee80211_ptr->iftype) {
2008         case NL80211_IFTYPE_AP:
2009         case NL80211_IFTYPE_AP_VLAN:
2010                 /* all ok but must have AID */
2011                 if (!params.aid)
2012                         err = -EINVAL;
2013                 break;
2014         case NL80211_IFTYPE_MESH_POINT:
2015                 /* disallow things mesh doesn't support */
2016                 if (params.vlan)
2017                         err = -EINVAL;
2018                 if (params.aid)
2019                         err = -EINVAL;
2020                 if (params.ht_capa)
2021                         err = -EINVAL;
2022                 if (params.listen_interval >= 0)
2023                         err = -EINVAL;
2024                 if (params.supported_rates)
2025                         err = -EINVAL;
2026                 if (params.sta_flags_mask)
2027                         err = -EINVAL;
2028                 break;
2029         default:
2030                 err = -EINVAL;
2031         }
2032
2033         if (err)
2034                 goto out;
2035
2036         if (!rdev->ops->add_station) {
2037                 err = -EOPNOTSUPP;
2038                 goto out;
2039         }
2040
2041         if (!netif_running(dev)) {
2042                 err = -ENETDOWN;
2043                 goto out;
2044         }
2045
2046         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2047
2048  out:
2049         if (params.vlan)
2050                 dev_put(params.vlan);
2051         cfg80211_unlock_rdev(rdev);
2052         dev_put(dev);
2053  out_rtnl:
2054         rtnl_unlock();
2055
2056         return err;
2057 }
2058
2059 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2060 {
2061         struct cfg80211_registered_device *rdev;
2062         int err;
2063         struct net_device *dev;
2064         u8 *mac_addr = NULL;
2065
2066         if (info->attrs[NL80211_ATTR_MAC])
2067                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2068
2069         rtnl_lock();
2070
2071         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2072         if (err)
2073                 goto out_rtnl;
2074
2075         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2076             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2077             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2078                 err = -EINVAL;
2079                 goto out;
2080         }
2081
2082         if (!rdev->ops->del_station) {
2083                 err = -EOPNOTSUPP;
2084                 goto out;
2085         }
2086
2087         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2088
2089  out:
2090         cfg80211_unlock_rdev(rdev);
2091         dev_put(dev);
2092  out_rtnl:
2093         rtnl_unlock();
2094
2095         return err;
2096 }
2097
2098 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2099                                 int flags, struct net_device *dev,
2100                                 u8 *dst, u8 *next_hop,
2101                                 struct mpath_info *pinfo)
2102 {
2103         void *hdr;
2104         struct nlattr *pinfoattr;
2105
2106         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2107         if (!hdr)
2108                 return -1;
2109
2110         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2111         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2112         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2113
2114         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2115
2116         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2117         if (!pinfoattr)
2118                 goto nla_put_failure;
2119         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2120                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2121                             pinfo->frame_qlen);
2122         if (pinfo->filled & MPATH_INFO_DSN)
2123                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
2124                             pinfo->dsn);
2125         if (pinfo->filled & MPATH_INFO_METRIC)
2126                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2127                             pinfo->metric);
2128         if (pinfo->filled & MPATH_INFO_EXPTIME)
2129                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2130                             pinfo->exptime);
2131         if (pinfo->filled & MPATH_INFO_FLAGS)
2132                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2133                             pinfo->flags);
2134         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2135                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2136                             pinfo->discovery_timeout);
2137         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2138                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2139                             pinfo->discovery_retries);
2140
2141         nla_nest_end(msg, pinfoattr);
2142
2143         return genlmsg_end(msg, hdr);
2144
2145  nla_put_failure:
2146         genlmsg_cancel(msg, hdr);
2147         return -EMSGSIZE;
2148 }
2149
2150 static int nl80211_dump_mpath(struct sk_buff *skb,
2151                               struct netlink_callback *cb)
2152 {
2153         struct mpath_info pinfo;
2154         struct cfg80211_registered_device *dev;
2155         struct net_device *netdev;
2156         u8 dst[ETH_ALEN];
2157         u8 next_hop[ETH_ALEN];
2158         int ifidx = cb->args[0];
2159         int path_idx = cb->args[1];
2160         int err;
2161
2162         if (!ifidx) {
2163                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2164                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2165                                   nl80211_policy);
2166                 if (err)
2167                         return err;
2168
2169                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2170                         return -EINVAL;
2171
2172                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2173                 if (!ifidx)
2174                         return -EINVAL;
2175         }
2176
2177         rtnl_lock();
2178
2179         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2180         if (!netdev) {
2181                 err = -ENODEV;
2182                 goto out_rtnl;
2183         }
2184
2185         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2186         if (IS_ERR(dev)) {
2187                 err = PTR_ERR(dev);
2188                 goto out_rtnl;
2189         }
2190
2191         if (!dev->ops->dump_mpath) {
2192                 err = -EOPNOTSUPP;
2193                 goto out_err;
2194         }
2195
2196         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2197                 err = -EOPNOTSUPP;
2198                 goto out;
2199         }
2200
2201         while (1) {
2202                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2203                                            dst, next_hop, &pinfo);
2204                 if (err == -ENOENT)
2205                         break;
2206                 if (err)
2207                         goto out_err;
2208
2209                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2210                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2211                                        netdev, dst, next_hop,
2212                                        &pinfo) < 0)
2213                         goto out;
2214
2215                 path_idx++;
2216         }
2217
2218
2219  out:
2220         cb->args[1] = path_idx;
2221         err = skb->len;
2222  out_err:
2223         cfg80211_unlock_rdev(dev);
2224  out_rtnl:
2225         rtnl_unlock();
2226
2227         return err;
2228 }
2229
2230 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2231 {
2232         struct cfg80211_registered_device *rdev;
2233         int err;
2234         struct net_device *dev;
2235         struct mpath_info pinfo;
2236         struct sk_buff *msg;
2237         u8 *dst = NULL;
2238         u8 next_hop[ETH_ALEN];
2239
2240         memset(&pinfo, 0, sizeof(pinfo));
2241
2242         if (!info->attrs[NL80211_ATTR_MAC])
2243                 return -EINVAL;
2244
2245         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2246
2247         rtnl_lock();
2248
2249         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2250         if (err)
2251                 goto out_rtnl;
2252
2253         if (!rdev->ops->get_mpath) {
2254                 err = -EOPNOTSUPP;
2255                 goto out;
2256         }
2257
2258         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2259                 err = -EOPNOTSUPP;
2260                 goto out;
2261         }
2262
2263         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2264         if (err)
2265                 goto out;
2266
2267         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2268         if (!msg)
2269                 goto out;
2270
2271         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2272                                  dev, dst, next_hop, &pinfo) < 0)
2273                 goto out_free;
2274
2275         err = genlmsg_reply(msg, info);
2276         goto out;
2277
2278  out_free:
2279         nlmsg_free(msg);
2280  out:
2281         cfg80211_unlock_rdev(rdev);
2282         dev_put(dev);
2283  out_rtnl:
2284         rtnl_unlock();
2285
2286         return err;
2287 }
2288
2289 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2290 {
2291         struct cfg80211_registered_device *rdev;
2292         int err;
2293         struct net_device *dev;
2294         u8 *dst = NULL;
2295         u8 *next_hop = NULL;
2296
2297         if (!info->attrs[NL80211_ATTR_MAC])
2298                 return -EINVAL;
2299
2300         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2301                 return -EINVAL;
2302
2303         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2304         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2305
2306         rtnl_lock();
2307
2308         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2309         if (err)
2310                 goto out_rtnl;
2311
2312         if (!rdev->ops->change_mpath) {
2313                 err = -EOPNOTSUPP;
2314                 goto out;
2315         }
2316
2317         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2318                 err = -EOPNOTSUPP;
2319                 goto out;
2320         }
2321
2322         if (!netif_running(dev)) {
2323                 err = -ENETDOWN;
2324                 goto out;
2325         }
2326
2327         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2328
2329  out:
2330         cfg80211_unlock_rdev(rdev);
2331         dev_put(dev);
2332  out_rtnl:
2333         rtnl_unlock();
2334
2335         return err;
2336 }
2337 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2338 {
2339         struct cfg80211_registered_device *rdev;
2340         int err;
2341         struct net_device *dev;
2342         u8 *dst = NULL;
2343         u8 *next_hop = NULL;
2344
2345         if (!info->attrs[NL80211_ATTR_MAC])
2346                 return -EINVAL;
2347
2348         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2349                 return -EINVAL;
2350
2351         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2352         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2353
2354         rtnl_lock();
2355
2356         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2357         if (err)
2358                 goto out_rtnl;
2359
2360         if (!rdev->ops->add_mpath) {
2361                 err = -EOPNOTSUPP;
2362                 goto out;
2363         }
2364
2365         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2366                 err = -EOPNOTSUPP;
2367                 goto out;
2368         }
2369
2370         if (!netif_running(dev)) {
2371                 err = -ENETDOWN;
2372                 goto out;
2373         }
2374
2375         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2376
2377  out:
2378         cfg80211_unlock_rdev(rdev);
2379         dev_put(dev);
2380  out_rtnl:
2381         rtnl_unlock();
2382
2383         return err;
2384 }
2385
2386 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2387 {
2388         struct cfg80211_registered_device *rdev;
2389         int err;
2390         struct net_device *dev;
2391         u8 *dst = NULL;
2392
2393         if (info->attrs[NL80211_ATTR_MAC])
2394                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2395
2396         rtnl_lock();
2397
2398         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2399         if (err)
2400                 goto out_rtnl;
2401
2402         if (!rdev->ops->del_mpath) {
2403                 err = -EOPNOTSUPP;
2404                 goto out;
2405         }
2406
2407         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2408
2409  out:
2410         cfg80211_unlock_rdev(rdev);
2411         dev_put(dev);
2412  out_rtnl:
2413         rtnl_unlock();
2414
2415         return err;
2416 }
2417
2418 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2419 {
2420         struct cfg80211_registered_device *rdev;
2421         int err;
2422         struct net_device *dev;
2423         struct bss_parameters params;
2424
2425         memset(&params, 0, sizeof(params));
2426         /* default to not changing parameters */
2427         params.use_cts_prot = -1;
2428         params.use_short_preamble = -1;
2429         params.use_short_slot_time = -1;
2430
2431         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2432                 params.use_cts_prot =
2433                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2434         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2435                 params.use_short_preamble =
2436                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2437         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2438                 params.use_short_slot_time =
2439                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2440         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2441                 params.basic_rates =
2442                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2443                 params.basic_rates_len =
2444                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2445         }
2446
2447         rtnl_lock();
2448
2449         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2450         if (err)
2451                 goto out_rtnl;
2452
2453         if (!rdev->ops->change_bss) {
2454                 err = -EOPNOTSUPP;
2455                 goto out;
2456         }
2457
2458         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2459                 err = -EOPNOTSUPP;
2460                 goto out;
2461         }
2462
2463         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2464
2465  out:
2466         cfg80211_unlock_rdev(rdev);
2467         dev_put(dev);
2468  out_rtnl:
2469         rtnl_unlock();
2470
2471         return err;
2472 }
2473
2474 static const struct nla_policy
2475         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2476         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2477         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2478         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2479         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2480         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2481         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2482 };
2483
2484 static int parse_reg_rule(struct nlattr *tb[],
2485         struct ieee80211_reg_rule *reg_rule)
2486 {
2487         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2488         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2489
2490         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2491                 return -EINVAL;
2492         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2493                 return -EINVAL;
2494         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2495                 return -EINVAL;
2496         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2497                 return -EINVAL;
2498         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2499                 return -EINVAL;
2500
2501         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2502
2503         freq_range->start_freq_khz =
2504                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2505         freq_range->end_freq_khz =
2506                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2507         freq_range->max_bandwidth_khz =
2508                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2509
2510         power_rule->max_eirp =
2511                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2512
2513         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2514                 power_rule->max_antenna_gain =
2515                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2516
2517         return 0;
2518 }
2519
2520 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2521 {
2522         int r;
2523         char *data = NULL;
2524
2525         /*
2526          * You should only get this when cfg80211 hasn't yet initialized
2527          * completely when built-in to the kernel right between the time
2528          * window between nl80211_init() and regulatory_init(), if that is
2529          * even possible.
2530          */
2531         mutex_lock(&cfg80211_mutex);
2532         if (unlikely(!cfg80211_regdomain)) {
2533                 mutex_unlock(&cfg80211_mutex);
2534                 return -EINPROGRESS;
2535         }
2536         mutex_unlock(&cfg80211_mutex);
2537
2538         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2539                 return -EINVAL;
2540
2541         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2542
2543 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2544         /* We ignore world regdom requests with the old regdom setup */
2545         if (is_world_regdom(data))
2546                 return -EINVAL;
2547 #endif
2548
2549         r = regulatory_hint_user(data);
2550
2551         return r;
2552 }
2553
2554 static int nl80211_get_mesh_params(struct sk_buff *skb,
2555         struct genl_info *info)
2556 {
2557         struct cfg80211_registered_device *rdev;
2558         struct mesh_config cur_params;
2559         int err;
2560         struct net_device *dev;
2561         void *hdr;
2562         struct nlattr *pinfoattr;
2563         struct sk_buff *msg;
2564
2565         rtnl_lock();
2566
2567         /* Look up our device */
2568         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2569         if (err)
2570                 goto out_rtnl;
2571
2572         if (!rdev->ops->get_mesh_params) {
2573                 err = -EOPNOTSUPP;
2574                 goto out;
2575         }
2576
2577         /* Get the mesh params */
2578         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2579         if (err)
2580                 goto out;
2581
2582         /* Draw up a netlink message to send back */
2583         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2584         if (!msg) {
2585                 err = -ENOBUFS;
2586                 goto out;
2587         }
2588         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2589                              NL80211_CMD_GET_MESH_PARAMS);
2590         if (!hdr)
2591                 goto nla_put_failure;
2592         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2593         if (!pinfoattr)
2594                 goto nla_put_failure;
2595         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2596         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2597                         cur_params.dot11MeshRetryTimeout);
2598         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2599                         cur_params.dot11MeshConfirmTimeout);
2600         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2601                         cur_params.dot11MeshHoldingTimeout);
2602         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2603                         cur_params.dot11MeshMaxPeerLinks);
2604         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2605                         cur_params.dot11MeshMaxRetries);
2606         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2607                         cur_params.dot11MeshTTL);
2608         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2609                         cur_params.auto_open_plinks);
2610         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2611                         cur_params.dot11MeshHWMPmaxPREQretries);
2612         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2613                         cur_params.path_refresh_time);
2614         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2615                         cur_params.min_discovery_timeout);
2616         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2617                         cur_params.dot11MeshHWMPactivePathTimeout);
2618         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2619                         cur_params.dot11MeshHWMPpreqMinInterval);
2620         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2621                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2622         nla_nest_end(msg, pinfoattr);
2623         genlmsg_end(msg, hdr);
2624         err = genlmsg_reply(msg, info);
2625         goto out;
2626
2627  nla_put_failure:
2628         genlmsg_cancel(msg, hdr);
2629         err = -EMSGSIZE;
2630  out:
2631         /* Cleanup */
2632         cfg80211_unlock_rdev(rdev);
2633         dev_put(dev);
2634  out_rtnl:
2635         rtnl_unlock();
2636
2637         return err;
2638 }
2639
2640 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2641 do {\
2642         if (table[attr_num]) {\
2643                 cfg.param = nla_fn(table[attr_num]); \
2644                 mask |= (1 << (attr_num - 1)); \
2645         } \
2646 } while (0);\
2647
2648 static struct nla_policy
2649 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2650         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2651         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2652         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2653         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2654         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2655         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2656         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2657
2658         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2659         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2660         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2661         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2662         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2663         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2664 };
2665
2666 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2667 {
2668         int err;
2669         u32 mask;
2670         struct cfg80211_registered_device *rdev;
2671         struct net_device *dev;
2672         struct mesh_config cfg;
2673         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2674         struct nlattr *parent_attr;
2675
2676         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2677         if (!parent_attr)
2678                 return -EINVAL;
2679         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2680                         parent_attr, nl80211_meshconf_params_policy))
2681                 return -EINVAL;
2682
2683         rtnl_lock();
2684
2685         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2686         if (err)
2687                 goto out_rtnl;
2688
2689         if (!rdev->ops->set_mesh_params) {
2690                 err = -EOPNOTSUPP;
2691                 goto out;
2692         }
2693
2694         /* This makes sure that there aren't more than 32 mesh config
2695          * parameters (otherwise our bitfield scheme would not work.) */
2696         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2697
2698         /* Fill in the params struct */
2699         mask = 0;
2700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2701                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2702         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2703                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2704         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2705                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2706         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2707                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2708         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2709                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2710         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2711                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2712         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2713                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2714         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2715                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2716                         nla_get_u8);
2717         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2718                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2719         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2720                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2721                         nla_get_u16);
2722         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2723                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2724                         nla_get_u32);
2725         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2726                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2727                         nla_get_u16);
2728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2729                         dot11MeshHWMPnetDiameterTraversalTime,
2730                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2731                         nla_get_u16);
2732
2733         /* Apply changes */
2734         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2735
2736  out:
2737         /* cleanup */
2738         cfg80211_unlock_rdev(rdev);
2739         dev_put(dev);
2740  out_rtnl:
2741         rtnl_unlock();
2742
2743         return err;
2744 }
2745
2746 #undef FILL_IN_MESH_PARAM_IF_SET
2747
2748 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2749 {
2750         struct sk_buff *msg;
2751         void *hdr = NULL;
2752         struct nlattr *nl_reg_rules;
2753         unsigned int i;
2754         int err = -EINVAL;
2755
2756         mutex_lock(&cfg80211_mutex);
2757
2758         if (!cfg80211_regdomain)
2759                 goto out;
2760
2761         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2762         if (!msg) {
2763                 err = -ENOBUFS;
2764                 goto out;
2765         }
2766
2767         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2768                              NL80211_CMD_GET_REG);
2769         if (!hdr)
2770                 goto nla_put_failure;
2771
2772         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2773                 cfg80211_regdomain->alpha2);
2774
2775         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2776         if (!nl_reg_rules)
2777                 goto nla_put_failure;
2778
2779         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2780                 struct nlattr *nl_reg_rule;
2781                 const struct ieee80211_reg_rule *reg_rule;
2782                 const struct ieee80211_freq_range *freq_range;
2783                 const struct ieee80211_power_rule *power_rule;
2784
2785                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2786                 freq_range = &reg_rule->freq_range;
2787                 power_rule = &reg_rule->power_rule;
2788
2789                 nl_reg_rule = nla_nest_start(msg, i);
2790                 if (!nl_reg_rule)
2791                         goto nla_put_failure;
2792
2793                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2794                         reg_rule->flags);
2795                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2796                         freq_range->start_freq_khz);
2797                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2798                         freq_range->end_freq_khz);
2799                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2800                         freq_range->max_bandwidth_khz);
2801                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2802                         power_rule->max_antenna_gain);
2803                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2804                         power_rule->max_eirp);
2805
2806                 nla_nest_end(msg, nl_reg_rule);
2807         }
2808
2809         nla_nest_end(msg, nl_reg_rules);
2810
2811         genlmsg_end(msg, hdr);
2812         err = genlmsg_reply(msg, info);
2813         goto out;
2814
2815 nla_put_failure:
2816         genlmsg_cancel(msg, hdr);
2817         err = -EMSGSIZE;
2818 out:
2819         mutex_unlock(&cfg80211_mutex);
2820         return err;
2821 }
2822
2823 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2824 {
2825         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2826         struct nlattr *nl_reg_rule;
2827         char *alpha2 = NULL;
2828         int rem_reg_rules = 0, r = 0;
2829         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2830         struct ieee80211_regdomain *rd = NULL;
2831
2832         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2833                 return -EINVAL;
2834
2835         if (!info->attrs[NL80211_ATTR_REG_RULES])
2836                 return -EINVAL;
2837
2838         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2839
2840         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2841                         rem_reg_rules) {
2842                 num_rules++;
2843                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2844                         return -EINVAL;
2845         }
2846
2847         mutex_lock(&cfg80211_mutex);
2848
2849         if (!reg_is_valid_request(alpha2)) {
2850                 r = -EINVAL;
2851                 goto bad_reg;
2852         }
2853
2854         size_of_regd = sizeof(struct ieee80211_regdomain) +
2855                 (num_rules * sizeof(struct ieee80211_reg_rule));
2856
2857         rd = kzalloc(size_of_regd, GFP_KERNEL);
2858         if (!rd) {
2859                 r = -ENOMEM;
2860                 goto bad_reg;
2861         }
2862
2863         rd->n_reg_rules = num_rules;
2864         rd->alpha2[0] = alpha2[0];
2865         rd->alpha2[1] = alpha2[1];
2866
2867         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2868                         rem_reg_rules) {
2869                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2870                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2871                         reg_rule_policy);
2872                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2873                 if (r)
2874                         goto bad_reg;
2875
2876                 rule_idx++;
2877
2878                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2879                         r = -EINVAL;
2880                         goto bad_reg;
2881                 }
2882         }
2883
2884         BUG_ON(rule_idx != num_rules);
2885
2886         r = set_regdom(rd);
2887
2888         mutex_unlock(&cfg80211_mutex);
2889
2890         return r;
2891
2892  bad_reg:
2893         mutex_unlock(&cfg80211_mutex);
2894         kfree(rd);
2895         return r;
2896 }
2897
2898 static int validate_scan_freqs(struct nlattr *freqs)
2899 {
2900         struct nlattr *attr1, *attr2;
2901         int n_channels = 0, tmp1, tmp2;
2902
2903         nla_for_each_nested(attr1, freqs, tmp1) {
2904                 n_channels++;
2905                 /*
2906                  * Some hardware has a limited channel list for
2907                  * scanning, and it is pretty much nonsensical
2908                  * to scan for a channel twice, so disallow that
2909                  * and don't require drivers to check that the
2910                  * channel list they get isn't longer than what
2911                  * they can scan, as long as they can scan all
2912                  * the channels they registered at once.
2913                  */
2914                 nla_for_each_nested(attr2, freqs, tmp2)
2915                         if (attr1 != attr2 &&
2916                             nla_get_u32(attr1) == nla_get_u32(attr2))
2917                                 return 0;
2918         }
2919
2920         return n_channels;
2921 }
2922
2923 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2924 {
2925         struct cfg80211_registered_device *rdev;
2926         struct net_device *dev;
2927         struct cfg80211_scan_request *request;
2928         struct cfg80211_ssid *ssid;
2929         struct ieee80211_channel *channel;
2930         struct nlattr *attr;
2931         struct wiphy *wiphy;
2932         int err, tmp, n_ssids = 0, n_channels, i;
2933         enum ieee80211_band band;
2934         size_t ie_len;
2935
2936         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2937                 return -EINVAL;
2938
2939         rtnl_lock();
2940
2941         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2942         if (err)
2943                 goto out_rtnl;
2944
2945         wiphy = &rdev->wiphy;
2946
2947         if (!rdev->ops->scan) {
2948                 err = -EOPNOTSUPP;
2949                 goto out;
2950         }
2951
2952         if (!netif_running(dev)) {
2953                 err = -ENETDOWN;
2954                 goto out;
2955         }
2956
2957         if (rdev->scan_req) {
2958                 err = -EBUSY;
2959                 goto out;
2960         }
2961
2962         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2963                 n_channels = validate_scan_freqs(
2964                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2965                 if (!n_channels) {
2966                         err = -EINVAL;
2967                         goto out;
2968                 }
2969         } else {
2970                 n_channels = 0;
2971
2972                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2973                         if (wiphy->bands[band])
2974                                 n_channels += wiphy->bands[band]->n_channels;
2975         }
2976
2977         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2978                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2979                         n_ssids++;
2980
2981         if (n_ssids > wiphy->max_scan_ssids) {
2982                 err = -EINVAL;
2983                 goto out;
2984         }
2985
2986         if (info->attrs[NL80211_ATTR_IE])
2987                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2988         else
2989                 ie_len = 0;
2990
2991         if (ie_len > wiphy->max_scan_ie_len) {
2992                 err = -EINVAL;
2993                 goto out;
2994         }
2995
2996         request = kzalloc(sizeof(*request)
2997                         + sizeof(*ssid) * n_ssids
2998                         + sizeof(channel) * n_channels
2999                         + ie_len, GFP_KERNEL);
3000         if (!request) {
3001                 err = -ENOMEM;
3002                 goto out;
3003         }
3004
3005         request->channels = (void *)((char *)request + sizeof(*request));
3006         request->n_channels = n_channels;
3007         if (n_ssids)
3008                 request->ssids = (void *)(request->channels + n_channels);
3009         request->n_ssids = n_ssids;
3010         if (ie_len) {
3011                 if (request->ssids)
3012                         request->ie = (void *)(request->ssids + n_ssids);
3013                 else
3014                         request->ie = (void *)(request->channels + n_channels);
3015         }
3016
3017         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3018                 /* user specified, bail out if channel not found */
3019                 request->n_channels = n_channels;
3020                 i = 0;
3021                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3022                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3023                         if (!request->channels[i]) {
3024                                 err = -EINVAL;
3025                                 goto out_free;
3026                         }
3027                         i++;
3028                 }
3029         } else {
3030                 /* all channels */
3031                 i = 0;
3032                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3033                         int j;
3034                         if (!wiphy->bands[band])
3035                                 continue;
3036                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3037                                 request->channels[i] = &wiphy->bands[band]->channels[j];
3038                                 i++;
3039                         }
3040                 }
3041         }
3042
3043         i = 0;
3044         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3045                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3046                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3047                                 err = -EINVAL;
3048                                 goto out_free;
3049                         }
3050                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3051                         request->ssids[i].ssid_len = nla_len(attr);
3052                         i++;
3053                 }
3054         }
3055
3056         if (info->attrs[NL80211_ATTR_IE]) {
3057                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3058                 memcpy((void *)request->ie,
3059                        nla_data(info->attrs[NL80211_ATTR_IE]),
3060                        request->ie_len);
3061         }
3062
3063         request->dev = dev;
3064         request->wiphy = &rdev->wiphy;
3065
3066         rdev->scan_req = request;
3067         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3068
3069         if (!err) {
3070                 nl80211_send_scan_start(rdev, dev);
3071                 dev_hold(dev);
3072         }
3073
3074  out_free:
3075         if (err) {
3076                 rdev->scan_req = NULL;
3077                 kfree(request);
3078         }
3079  out:
3080         cfg80211_unlock_rdev(rdev);
3081         dev_put(dev);
3082  out_rtnl:
3083         rtnl_unlock();
3084
3085         return err;
3086 }
3087
3088 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3089                             struct cfg80211_registered_device *rdev,
3090                             struct wireless_dev *wdev,
3091                             struct cfg80211_internal_bss *intbss)
3092 {
3093         struct cfg80211_bss *res = &intbss->pub;
3094         void *hdr;
3095         struct nlattr *bss;
3096         int i;
3097
3098         ASSERT_WDEV_LOCK(wdev);
3099
3100         hdr = nl80211hdr_put(msg, pid, seq, flags,
3101                              NL80211_CMD_NEW_SCAN_RESULTS);
3102         if (!hdr)
3103                 return -1;
3104
3105         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3106         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3107
3108         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3109         if (!bss)
3110                 goto nla_put_failure;
3111         if (!is_zero_ether_addr(res->bssid))
3112                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3113         if (res->information_elements && res->len_information_elements)
3114                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3115                         res->len_information_elements,
3116                         res->information_elements);
3117         if (res->tsf)
3118                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3119         if (res->beacon_interval)
3120                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3121         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3122         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3123
3124         switch (rdev->wiphy.signal_type) {
3125         case CFG80211_SIGNAL_TYPE_MBM:
3126                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3127                 break;
3128         case CFG80211_SIGNAL_TYPE_UNSPEC:
3129                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3130                 break;
3131         default:
3132                 break;
3133         }
3134
3135         switch (wdev->iftype) {
3136         case NL80211_IFTYPE_STATION:
3137                 if (intbss == wdev->current_bss)
3138                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3139                                     NL80211_BSS_STATUS_ASSOCIATED);
3140                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3141                         if (intbss != wdev->auth_bsses[i])
3142                                 continue;
3143                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3144                                     NL80211_BSS_STATUS_AUTHENTICATED);
3145                         break;
3146                 }
3147                 break;
3148         case NL80211_IFTYPE_ADHOC:
3149                 if (intbss == wdev->current_bss)
3150                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3151                                     NL80211_BSS_STATUS_IBSS_JOINED);
3152                 break;
3153         default:
3154                 break;
3155         }
3156
3157         nla_nest_end(msg, bss);
3158
3159         return genlmsg_end(msg, hdr);
3160
3161  nla_put_failure:
3162         genlmsg_cancel(msg, hdr);
3163         return -EMSGSIZE;
3164 }
3165
3166 static int nl80211_dump_scan(struct sk_buff *skb,
3167                              struct netlink_callback *cb)
3168 {
3169         struct cfg80211_registered_device *rdev;
3170         struct net_device *dev;
3171         struct cfg80211_internal_bss *scan;
3172         struct wireless_dev *wdev;
3173         int ifidx = cb->args[0];
3174         int start = cb->args[1], idx = 0;
3175         int err;
3176
3177         if (!ifidx) {
3178                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
3179                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
3180                                   nl80211_policy);
3181                 if (err)
3182                         return err;
3183
3184                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
3185                         return -EINVAL;
3186
3187                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
3188                 if (!ifidx)
3189                         return -EINVAL;
3190                 cb->args[0] = ifidx;
3191         }
3192
3193         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3194         if (!dev)
3195                 return -ENODEV;
3196
3197         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3198         if (IS_ERR(rdev)) {
3199                 err = PTR_ERR(rdev);
3200                 goto out_put_netdev;
3201         }
3202
3203         wdev = dev->ieee80211_ptr;
3204
3205         wdev_lock(wdev);
3206         spin_lock_bh(&rdev->bss_lock);
3207         cfg80211_bss_expire(rdev);
3208
3209         list_for_each_entry(scan, &rdev->bss_list, list) {
3210                 if (++idx <= start)
3211                         continue;
3212                 if (nl80211_send_bss(skb,
3213                                 NETLINK_CB(cb->skb).pid,
3214                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3215                                 rdev, wdev, scan) < 0) {
3216                         idx--;
3217                         goto out;
3218                 }
3219         }
3220
3221  out:
3222         spin_unlock_bh(&rdev->bss_lock);
3223         wdev_unlock(wdev);
3224
3225         cb->args[1] = idx;
3226         err = skb->len;
3227         cfg80211_unlock_rdev(rdev);
3228  out_put_netdev:
3229         dev_put(dev);
3230
3231         return err;
3232 }
3233
3234 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3235 {
3236         return auth_type <= NL80211_AUTHTYPE_MAX;
3237 }
3238
3239 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3240 {
3241         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3242                                   NL80211_WPA_VERSION_2));
3243 }
3244
3245 static bool nl80211_valid_akm_suite(u32 akm)
3246 {
3247         return akm == WLAN_AKM_SUITE_8021X ||
3248                 akm == WLAN_AKM_SUITE_PSK;
3249 }
3250
3251 static bool nl80211_valid_cipher_suite(u32 cipher)
3252 {
3253         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3254                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3255                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3256                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3257                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3258 }
3259
3260
3261 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3262 {
3263         struct cfg80211_registered_device *rdev;
3264         struct net_device *dev;
3265         struct ieee80211_channel *chan;
3266         const u8 *bssid, *ssid, *ie = NULL;
3267         int err, ssid_len, ie_len = 0;
3268         enum nl80211_auth_type auth_type;
3269         struct key_parse key;
3270
3271         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3272                 return -EINVAL;
3273
3274         if (!info->attrs[NL80211_ATTR_MAC])
3275                 return -EINVAL;
3276
3277         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3278                 return -EINVAL;
3279
3280         if (!info->attrs[NL80211_ATTR_SSID])
3281                 return -EINVAL;
3282
3283         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3284                 return -EINVAL;
3285
3286         err = nl80211_parse_key(info, &key);
3287         if (err)
3288                 return err;
3289
3290         if (key.idx >= 0) {
3291                 if (!key.p.key || !key.p.key_len)
3292                         return -EINVAL;
3293                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3294                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3295                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3296                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3297                         return -EINVAL;
3298                 if (key.idx > 4)
3299                         return -EINVAL;
3300         } else {
3301                 key.p.key_len = 0;
3302                 key.p.key = NULL;
3303         }
3304
3305         rtnl_lock();
3306
3307         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3308         if (err)
3309                 goto unlock_rtnl;
3310
3311         if (!rdev->ops->auth) {
3312                 err = -EOPNOTSUPP;
3313                 goto out;
3314         }
3315
3316         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3317                 err = -EOPNOTSUPP;
3318                 goto out;
3319         }
3320
3321         if (!netif_running(dev)) {
3322                 err = -ENETDOWN;
3323                 goto out;
3324         }
3325
3326         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3327         chan = ieee80211_get_channel(&rdev->wiphy,
3328                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3329         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3330                 err = -EINVAL;
3331                 goto out;
3332         }
3333
3334         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3335         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3336
3337         if (info->attrs[NL80211_ATTR_IE]) {
3338                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3339                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3340         }
3341
3342         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3343         if (!nl80211_valid_auth_type(auth_type)) {
3344                 err = -EINVAL;
3345                 goto out;
3346         }
3347
3348         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3349                                  ssid, ssid_len, ie, ie_len,
3350                                  key.p.key, key.p.key_len, key.idx);
3351
3352 out:
3353         cfg80211_unlock_rdev(rdev);
3354         dev_put(dev);
3355 unlock_rtnl:
3356         rtnl_unlock();
3357         return err;
3358 }
3359
3360 static int nl80211_crypto_settings(struct genl_info *info,
3361                                    struct cfg80211_crypto_settings *settings,
3362                                    int cipher_limit)
3363 {
3364         memset(settings, 0, sizeof(*settings));
3365
3366         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3367
3368         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3369                 void *data;
3370                 int len, i;
3371
3372                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3373                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3374                 settings->n_ciphers_pairwise = len / sizeof(u32);
3375
3376                 if (len % sizeof(u32))
3377                         return -EINVAL;
3378
3379                 if (settings->n_ciphers_pairwise > cipher_limit)
3380                         return -EINVAL;
3381
3382                 memcpy(settings->ciphers_pairwise, data, len);
3383
3384                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3385                         if (!nl80211_valid_cipher_suite(
3386                                         settings->ciphers_pairwise[i]))
3387                                 return -EINVAL;
3388         }
3389
3390         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3391                 settings->cipher_group =
3392                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3393                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3394                         return -EINVAL;
3395         }
3396
3397         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3398                 settings->wpa_versions =
3399                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3400                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3401                         return -EINVAL;
3402         }
3403
3404         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3405                 void *data;
3406                 int len, i;
3407
3408                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3409                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3410                 settings->n_akm_suites = len / sizeof(u32);
3411
3412                 if (len % sizeof(u32))
3413                         return -EINVAL;
3414
3415                 memcpy(settings->akm_suites, data, len);
3416
3417                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3418                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3419                                 return -EINVAL;
3420         }
3421
3422         return 0;
3423 }
3424
3425 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3426 {
3427         struct cfg80211_registered_device *rdev;
3428         struct net_device *dev;
3429         struct cfg80211_crypto_settings crypto;
3430         struct ieee80211_channel *chan, *fixedchan;
3431         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3432         int err, ssid_len, ie_len = 0;
3433         bool use_mfp = false;
3434
3435         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3436                 return -EINVAL;
3437
3438         if (!info->attrs[NL80211_ATTR_MAC] ||
3439             !info->attrs[NL80211_ATTR_SSID] ||
3440             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3441                 return -EINVAL;
3442
3443         rtnl_lock();
3444
3445         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3446         if (err)
3447                 goto unlock_rtnl;
3448
3449         if (!rdev->ops->assoc) {
3450                 err = -EOPNOTSUPP;
3451                 goto out;
3452         }
3453
3454         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3455                 err = -EOPNOTSUPP;
3456                 goto out;
3457         }
3458
3459         if (!netif_running(dev)) {
3460                 err = -ENETDOWN;
3461                 goto out;
3462         }
3463
3464         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3465
3466         chan = ieee80211_get_channel(&rdev->wiphy,
3467                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3468         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3469                 err = -EINVAL;
3470                 goto out;
3471         }
3472
3473         mutex_lock(&rdev->devlist_mtx);
3474         fixedchan = rdev_fixed_channel(rdev, NULL);
3475         if (fixedchan && chan != fixedchan) {
3476                 err = -EBUSY;
3477                 mutex_unlock(&rdev->devlist_mtx);
3478                 goto out;
3479         }
3480         mutex_unlock(&rdev->devlist_mtx);
3481
3482         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3483         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3484
3485         if (info->attrs[NL80211_ATTR_IE]) {
3486                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3487                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3488         }
3489
3490         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3491                 enum nl80211_mfp mfp =
3492                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3493                 if (mfp == NL80211_MFP_REQUIRED)
3494                         use_mfp = true;
3495                 else if (mfp != NL80211_MFP_NO) {
3496                         err = -EINVAL;
3497                         goto out;
3498                 }
3499         }
3500
3501         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3502                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3503
3504         err = nl80211_crypto_settings(info, &crypto, 1);
3505         if (!err)
3506                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3507                                           ssid, ssid_len, ie, ie_len, use_mfp,
3508                                           &crypto);
3509
3510 out:
3511         cfg80211_unlock_rdev(rdev);
3512         dev_put(dev);
3513 unlock_rtnl:
3514         rtnl_unlock();
3515         return err;
3516 }
3517
3518 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3519 {
3520         struct cfg80211_registered_device *rdev;
3521         struct net_device *dev;
3522         const u8 *ie = NULL, *bssid;
3523         int err, ie_len = 0;
3524         u16 reason_code;
3525
3526         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3527                 return -EINVAL;
3528
3529         if (!info->attrs[NL80211_ATTR_MAC])
3530                 return -EINVAL;
3531
3532         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3533                 return -EINVAL;
3534
3535         rtnl_lock();
3536
3537         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3538         if (err)
3539                 goto unlock_rtnl;
3540
3541         if (!rdev->ops->deauth) {
3542                 err = -EOPNOTSUPP;
3543                 goto out;
3544         }
3545
3546         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3547                 err = -EOPNOTSUPP;
3548                 goto out;
3549         }
3550
3551         if (!netif_running(dev)) {
3552                 err = -ENETDOWN;
3553                 goto out;
3554         }
3555
3556         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3557
3558         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3559         if (reason_code == 0) {
3560                 /* Reason Code 0 is reserved */
3561                 err = -EINVAL;
3562                 goto out;
3563         }
3564
3565         if (info->attrs[NL80211_ATTR_IE]) {
3566                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3567                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3568         }
3569
3570         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3571
3572 out:
3573         cfg80211_unlock_rdev(rdev);
3574         dev_put(dev);
3575 unlock_rtnl:
3576         rtnl_unlock();
3577         return err;
3578 }
3579
3580 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3581 {
3582         struct cfg80211_registered_device *rdev;
3583         struct net_device *dev;
3584         const u8 *ie = NULL, *bssid;
3585         int err, ie_len = 0;
3586         u16 reason_code;
3587
3588         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3589                 return -EINVAL;
3590
3591         if (!info->attrs[NL80211_ATTR_MAC])
3592                 return -EINVAL;
3593
3594         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3595                 return -EINVAL;
3596
3597         rtnl_lock();
3598
3599         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3600         if (err)
3601                 goto unlock_rtnl;
3602
3603         if (!rdev->ops->disassoc) {
3604                 err = -EOPNOTSUPP;
3605                 goto out;
3606         }
3607
3608         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3609                 err = -EOPNOTSUPP;
3610                 goto out;
3611         }
3612
3613         if (!netif_running(dev)) {
3614                 err = -ENETDOWN;
3615                 goto out;
3616         }
3617
3618         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3619
3620         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3621         if (reason_code == 0) {
3622                 /* Reason Code 0 is reserved */
3623                 err = -EINVAL;
3624                 goto out;
3625         }
3626
3627         if (info->attrs[NL80211_ATTR_IE]) {
3628                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3629                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3630         }
3631
3632         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3633
3634 out:
3635         cfg80211_unlock_rdev(rdev);
3636         dev_put(dev);
3637 unlock_rtnl:
3638         rtnl_unlock();
3639         return err;
3640 }
3641
3642 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3643 {
3644         struct cfg80211_registered_device *rdev;
3645         struct net_device *dev;
3646         struct cfg80211_ibss_params ibss;
3647         struct wiphy *wiphy;
3648         struct cfg80211_cached_keys *connkeys = NULL;
3649         int err;
3650
3651         memset(&ibss, 0, sizeof(ibss));
3652
3653         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3654                 return -EINVAL;
3655
3656         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3657             !info->attrs[NL80211_ATTR_SSID] ||
3658             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3659                 return -EINVAL;
3660
3661         ibss.beacon_interval = 100;
3662
3663         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3664                 ibss.beacon_interval =
3665                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3666                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3667                         return -EINVAL;
3668         }
3669
3670         rtnl_lock();
3671
3672         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3673         if (err)
3674                 goto unlock_rtnl;
3675
3676         if (!rdev->ops->join_ibss) {
3677                 err = -EOPNOTSUPP;
3678                 goto out;
3679         }
3680
3681         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3682                 err = -EOPNOTSUPP;
3683                 goto out;
3684         }
3685
3686         if (!netif_running(dev)) {
3687                 err = -ENETDOWN;
3688                 goto out;
3689         }
3690
3691         wiphy = &rdev->wiphy;
3692
3693         if (info->attrs[NL80211_ATTR_MAC])
3694                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3695         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3696         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3697
3698         if (info->attrs[NL80211_ATTR_IE]) {
3699                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3700                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3701         }
3702
3703         ibss.channel = ieee80211_get_channel(wiphy,
3704                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3705         if (!ibss.channel ||
3706             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3707             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3708                 err = -EINVAL;
3709                 goto out;
3710         }
3711
3712         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3713         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3714
3715         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3716                 connkeys = nl80211_parse_connkeys(rdev,
3717                                         info->attrs[NL80211_ATTR_KEYS]);
3718                 if (IS_ERR(connkeys)) {
3719                         err = PTR_ERR(connkeys);
3720                         connkeys = NULL;
3721                         goto out;
3722                 }
3723         }
3724
3725         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3726
3727 out:
3728         cfg80211_unlock_rdev(rdev);
3729         dev_put(dev);
3730 unlock_rtnl:
3731         if (err)
3732                 kfree(connkeys);
3733         rtnl_unlock();
3734         return err;
3735 }
3736
3737 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3738 {
3739         struct cfg80211_registered_device *rdev;
3740         struct net_device *dev;
3741         int err;
3742
3743         rtnl_lock();
3744
3745         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3746         if (err)
3747                 goto unlock_rtnl;
3748
3749         if (!rdev->ops->leave_ibss) {
3750                 err = -EOPNOTSUPP;
3751                 goto out;
3752         }
3753
3754         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3755                 err = -EOPNOTSUPP;
3756                 goto out;
3757         }
3758
3759         if (!netif_running(dev)) {
3760                 err = -ENETDOWN;
3761                 goto out;
3762         }
3763
3764         err = cfg80211_leave_ibss(rdev, dev, false);
3765
3766 out:
3767         cfg80211_unlock_rdev(rdev);
3768         dev_put(dev);
3769 unlock_rtnl:
3770         rtnl_unlock();
3771         return err;
3772 }
3773
3774 #ifdef CONFIG_NL80211_TESTMODE
3775 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3776         .name = "testmode",
3777 };
3778
3779 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3780 {
3781         struct cfg80211_registered_device *rdev;
3782         int err;
3783
3784         if (!info->attrs[NL80211_ATTR_TESTDATA])
3785                 return -EINVAL;
3786
3787         rtnl_lock();
3788
3789         rdev = cfg80211_get_dev_from_info(info);
3790         if (IS_ERR(rdev)) {
3791                 err = PTR_ERR(rdev);
3792                 goto unlock_rtnl;
3793         }
3794
3795         err = -EOPNOTSUPP;
3796         if (rdev->ops->testmode_cmd) {
3797                 rdev->testmode_info = info;
3798                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3799                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3800                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3801                 rdev->testmode_info = NULL;
3802         }
3803
3804         cfg80211_unlock_rdev(rdev);
3805
3806  unlock_rtnl:
3807         rtnl_unlock();
3808         return err;
3809 }
3810
3811 static struct sk_buff *
3812 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3813                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3814 {
3815         struct sk_buff *skb;
3816         void *hdr;
3817         struct nlattr *data;
3818
3819         skb = nlmsg_new(approxlen + 100, gfp);
3820         if (!skb)
3821                 return NULL;
3822
3823         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3824         if (!hdr) {
3825                 kfree_skb(skb);
3826                 return NULL;
3827         }
3828
3829         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3830         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3831
3832         ((void **)skb->cb)[0] = rdev;
3833         ((void **)skb->cb)[1] = hdr;
3834         ((void **)skb->cb)[2] = data;
3835
3836         return skb;
3837
3838  nla_put_failure:
3839         kfree_skb(skb);
3840         return NULL;
3841 }
3842
3843 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3844                                                   int approxlen)
3845 {
3846         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3847
3848         if (WARN_ON(!rdev->testmode_info))
3849                 return NULL;
3850
3851         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3852                                 rdev->testmode_info->snd_pid,
3853                                 rdev->testmode_info->snd_seq,
3854                                 GFP_KERNEL);
3855 }
3856 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3857
3858 int cfg80211_testmode_reply(struct sk_buff *skb)
3859 {
3860         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3861         void *hdr = ((void **)skb->cb)[1];
3862         struct nlattr *data = ((void **)skb->cb)[2];
3863
3864         if (WARN_ON(!rdev->testmode_info)) {
3865                 kfree_skb(skb);
3866                 return -EINVAL;
3867         }
3868
3869         nla_nest_end(skb, data);
3870         genlmsg_end(skb, hdr);
3871         return genlmsg_reply(skb, rdev->testmode_info);
3872 }
3873 EXPORT_SYMBOL(cfg80211_testmode_reply);
3874
3875 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3876                                                   int approxlen, gfp_t gfp)
3877 {
3878         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3879
3880         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3881 }
3882 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3883
3884 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3885 {
3886         void *hdr = ((void **)skb->cb)[1];
3887         struct nlattr *data = ((void **)skb->cb)[2];
3888
3889         nla_nest_end(skb, data);
3890         genlmsg_end(skb, hdr);
3891         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3892 }
3893 EXPORT_SYMBOL(cfg80211_testmode_event);
3894 #endif
3895
3896 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3897 {
3898         struct cfg80211_registered_device *rdev;
3899         struct net_device *dev;
3900         struct cfg80211_connect_params connect;
3901         struct wiphy *wiphy;
3902         struct cfg80211_cached_keys *connkeys = NULL;
3903         int err;
3904
3905         memset(&connect, 0, sizeof(connect));
3906
3907         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3908                 return -EINVAL;
3909
3910         if (!info->attrs[NL80211_ATTR_SSID] ||
3911             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3912                 return -EINVAL;
3913
3914         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3915                 connect.auth_type =
3916                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3917                 if (!nl80211_valid_auth_type(connect.auth_type))
3918                         return -EINVAL;
3919         } else
3920                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3921
3922         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3923
3924         err = nl80211_crypto_settings(info, &connect.crypto,
3925                                       NL80211_MAX_NR_CIPHER_SUITES);
3926         if (err)
3927                 return err;
3928         rtnl_lock();
3929
3930         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3931         if (err)
3932                 goto unlock_rtnl;
3933
3934         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3935                 err = -EOPNOTSUPP;
3936                 goto out;
3937         }
3938
3939         if (!netif_running(dev)) {
3940                 err = -ENETDOWN;
3941                 goto out;
3942         }
3943
3944         wiphy = &rdev->wiphy;
3945
3946         if (info->attrs[NL80211_ATTR_MAC])
3947                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3948         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3949         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3950
3951         if (info->attrs[NL80211_ATTR_IE]) {
3952                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3953                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3954         }
3955
3956         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3957                 connect.channel =
3958                         ieee80211_get_channel(wiphy,
3959                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3960                 if (!connect.channel ||
3961                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
3962                         err = -EINVAL;
3963                         goto out;
3964                 }
3965         }
3966
3967         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3968                 connkeys = nl80211_parse_connkeys(rdev,
3969                                         info->attrs[NL80211_ATTR_KEYS]);
3970                 if (IS_ERR(connkeys)) {
3971                         err = PTR_ERR(connkeys);
3972                         connkeys = NULL;
3973                         goto out;
3974                 }
3975         }
3976
3977         err = cfg80211_connect(rdev, dev, &connect, connkeys);
3978
3979 out:
3980         cfg80211_unlock_rdev(rdev);
3981         dev_put(dev);
3982 unlock_rtnl:
3983         if (err)
3984                 kfree(connkeys);
3985         rtnl_unlock();
3986         return err;
3987 }
3988
3989 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
3990 {
3991         struct cfg80211_registered_device *rdev;
3992         struct net_device *dev;
3993         int err;
3994         u16 reason;
3995
3996         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3997                 reason = WLAN_REASON_DEAUTH_LEAVING;
3998         else
3999                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4000
4001         if (reason == 0)
4002                 return -EINVAL;
4003
4004         rtnl_lock();
4005
4006         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4007         if (err)
4008                 goto unlock_rtnl;
4009
4010         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4011                 err = -EOPNOTSUPP;
4012                 goto out;
4013         }
4014
4015         if (!netif_running(dev)) {
4016                 err = -ENETDOWN;
4017                 goto out;
4018         }
4019
4020         err = cfg80211_disconnect(rdev, dev, reason, true);
4021
4022 out:
4023         cfg80211_unlock_rdev(rdev);
4024         dev_put(dev);
4025 unlock_rtnl:
4026         rtnl_unlock();
4027         return err;
4028 }
4029
4030 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4031 {
4032         struct cfg80211_registered_device *rdev;
4033         struct net *net;
4034         int err;
4035         u32 pid;
4036
4037         if (!info->attrs[NL80211_ATTR_PID])
4038                 return -EINVAL;
4039
4040         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4041
4042         rtnl_lock();
4043
4044         rdev = cfg80211_get_dev_from_info(info);
4045         if (IS_ERR(rdev)) {
4046                 err = PTR_ERR(rdev);
4047                 goto out;
4048         }
4049
4050         net = get_net_ns_by_pid(pid);
4051         if (IS_ERR(net)) {
4052                 err = PTR_ERR(net);
4053                 goto out;
4054         }
4055
4056         err = 0;
4057
4058         /* check if anything to do */
4059         if (net_eq(wiphy_net(&rdev->wiphy), net))
4060                 goto out_put_net;
4061
4062         err = cfg80211_switch_netns(rdev, net);
4063  out_put_net:
4064         put_net(net);
4065  out:
4066         cfg80211_unlock_rdev(rdev);
4067         rtnl_unlock();
4068         return err;
4069 }
4070
4071 static struct genl_ops nl80211_ops[] = {
4072         {
4073                 .cmd = NL80211_CMD_GET_WIPHY,
4074                 .doit = nl80211_get_wiphy,
4075                 .dumpit = nl80211_dump_wiphy,
4076                 .policy = nl80211_policy,
4077                 /* can be retrieved by unprivileged users */
4078         },
4079         {
4080                 .cmd = NL80211_CMD_SET_WIPHY,
4081                 .doit = nl80211_set_wiphy,
4082                 .policy = nl80211_policy,
4083                 .flags = GENL_ADMIN_PERM,
4084         },
4085         {
4086                 .cmd = NL80211_CMD_GET_INTERFACE,
4087                 .doit = nl80211_get_interface,
4088                 .dumpit = nl80211_dump_interface,
4089                 .policy = nl80211_policy,
4090                 /* can be retrieved by unprivileged users */
4091         },
4092         {
4093                 .cmd = NL80211_CMD_SET_INTERFACE,
4094                 .doit = nl80211_set_interface,
4095                 .policy = nl80211_policy,
4096                 .flags = GENL_ADMIN_PERM,
4097         },
4098         {
4099                 .cmd = NL80211_CMD_NEW_INTERFACE,
4100                 .doit = nl80211_new_interface,
4101                 .policy = nl80211_policy,
4102                 .flags = GENL_ADMIN_PERM,
4103         },
4104         {
4105                 .cmd = NL80211_CMD_DEL_INTERFACE,
4106                 .doit = nl80211_del_interface,
4107                 .policy = nl80211_policy,
4108                 .flags = GENL_ADMIN_PERM,
4109         },
4110         {
4111                 .cmd = NL80211_CMD_GET_KEY,
4112                 .doit = nl80211_get_key,
4113                 .policy = nl80211_policy,
4114                 .flags = GENL_ADMIN_PERM,
4115         },
4116         {
4117                 .cmd = NL80211_CMD_SET_KEY,
4118                 .doit = nl80211_set_key,
4119                 .policy = nl80211_policy,
4120                 .flags = GENL_ADMIN_PERM,
4121         },
4122         {
4123                 .cmd = NL80211_CMD_NEW_KEY,
4124                 .doit = nl80211_new_key,
4125                 .policy = nl80211_policy,
4126                 .flags = GENL_ADMIN_PERM,
4127         },
4128         {
4129                 .cmd = NL80211_CMD_DEL_KEY,
4130                 .doit = nl80211_del_key,
4131                 .policy = nl80211_policy,
4132                 .flags = GENL_ADMIN_PERM,
4133         },
4134         {
4135                 .cmd = NL80211_CMD_SET_BEACON,
4136                 .policy = nl80211_policy,
4137                 .flags = GENL_ADMIN_PERM,
4138                 .doit = nl80211_addset_beacon,
4139         },
4140         {
4141                 .cmd = NL80211_CMD_NEW_BEACON,
4142                 .policy = nl80211_policy,
4143                 .flags = GENL_ADMIN_PERM,
4144                 .doit = nl80211_addset_beacon,
4145         },
4146         {
4147                 .cmd = NL80211_CMD_DEL_BEACON,
4148                 .policy = nl80211_policy,
4149                 .flags = GENL_ADMIN_PERM,
4150                 .doit = nl80211_del_beacon,
4151         },
4152         {
4153                 .cmd = NL80211_CMD_GET_STATION,
4154                 .doit = nl80211_get_station,
4155                 .dumpit = nl80211_dump_station,
4156                 .policy = nl80211_policy,
4157         },
4158         {
4159                 .cmd = NL80211_CMD_SET_STATION,
4160                 .doit = nl80211_set_station,
4161                 .policy = nl80211_policy,
4162                 .flags = GENL_ADMIN_PERM,
4163         },
4164         {
4165                 .cmd = NL80211_CMD_NEW_STATION,
4166                 .doit = nl80211_new_station,
4167                 .policy = nl80211_policy,
4168                 .flags = GENL_ADMIN_PERM,
4169         },
4170         {
4171                 .cmd = NL80211_CMD_DEL_STATION,
4172                 .doit = nl80211_del_station,
4173                 .policy = nl80211_policy,
4174                 .flags = GENL_ADMIN_PERM,
4175         },
4176         {
4177                 .cmd = NL80211_CMD_GET_MPATH,
4178                 .doit = nl80211_get_mpath,
4179                 .dumpit = nl80211_dump_mpath,
4180                 .policy = nl80211_policy,
4181                 .flags = GENL_ADMIN_PERM,
4182         },
4183         {
4184                 .cmd = NL80211_CMD_SET_MPATH,
4185                 .doit = nl80211_set_mpath,
4186                 .policy = nl80211_policy,
4187                 .flags = GENL_ADMIN_PERM,
4188         },
4189         {
4190                 .cmd = NL80211_CMD_NEW_MPATH,
4191                 .doit = nl80211_new_mpath,
4192                 .policy = nl80211_policy,
4193                 .flags = GENL_ADMIN_PERM,
4194         },
4195         {
4196                 .cmd = NL80211_CMD_DEL_MPATH,
4197                 .doit = nl80211_del_mpath,
4198                 .policy = nl80211_policy,
4199                 .flags = GENL_ADMIN_PERM,
4200         },
4201         {
4202                 .cmd = NL80211_CMD_SET_BSS,
4203                 .doit = nl80211_set_bss,
4204                 .policy = nl80211_policy,
4205                 .flags = GENL_ADMIN_PERM,
4206         },
4207         {
4208                 .cmd = NL80211_CMD_GET_REG,
4209                 .doit = nl80211_get_reg,
4210                 .policy = nl80211_policy,
4211                 /* can be retrieved by unprivileged users */
4212         },
4213         {
4214                 .cmd = NL80211_CMD_SET_REG,
4215                 .doit = nl80211_set_reg,
4216                 .policy = nl80211_policy,
4217                 .flags = GENL_ADMIN_PERM,
4218         },
4219         {
4220                 .cmd = NL80211_CMD_REQ_SET_REG,
4221                 .doit = nl80211_req_set_reg,
4222                 .policy = nl80211_policy,
4223                 .flags = GENL_ADMIN_PERM,
4224         },
4225         {
4226                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4227                 .doit = nl80211_get_mesh_params,
4228                 .policy = nl80211_policy,
4229                 /* can be retrieved by unprivileged users */
4230         },
4231         {
4232                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4233                 .doit = nl80211_set_mesh_params,
4234                 .policy = nl80211_policy,
4235                 .flags = GENL_ADMIN_PERM,
4236         },
4237         {
4238                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4239                 .doit = nl80211_trigger_scan,
4240                 .policy = nl80211_policy,
4241                 .flags = GENL_ADMIN_PERM,
4242         },
4243         {
4244                 .cmd = NL80211_CMD_GET_SCAN,
4245                 .policy = nl80211_policy,
4246                 .dumpit = nl80211_dump_scan,
4247         },
4248         {
4249                 .cmd = NL80211_CMD_AUTHENTICATE,
4250                 .doit = nl80211_authenticate,
4251                 .policy = nl80211_policy,
4252                 .flags = GENL_ADMIN_PERM,
4253         },
4254         {
4255                 .cmd = NL80211_CMD_ASSOCIATE,
4256                 .doit = nl80211_associate,
4257                 .policy = nl80211_policy,
4258                 .flags = GENL_ADMIN_PERM,
4259         },
4260         {
4261                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4262                 .doit = nl80211_deauthenticate,
4263                 .policy = nl80211_policy,
4264                 .flags = GENL_ADMIN_PERM,
4265         },
4266         {
4267                 .cmd = NL80211_CMD_DISASSOCIATE,
4268                 .doit = nl80211_disassociate,
4269                 .policy = nl80211_policy,
4270                 .flags = GENL_ADMIN_PERM,
4271         },
4272         {
4273                 .cmd = NL80211_CMD_JOIN_IBSS,
4274                 .doit = nl80211_join_ibss,
4275                 .policy = nl80211_policy,
4276                 .flags = GENL_ADMIN_PERM,
4277         },
4278         {
4279                 .cmd = NL80211_CMD_LEAVE_IBSS,
4280                 .doit = nl80211_leave_ibss,
4281                 .policy = nl80211_policy,
4282                 .flags = GENL_ADMIN_PERM,
4283         },
4284 #ifdef CONFIG_NL80211_TESTMODE
4285         {
4286                 .cmd = NL80211_CMD_TESTMODE,
4287                 .doit = nl80211_testmode_do,
4288                 .policy = nl80211_policy,
4289                 .flags = GENL_ADMIN_PERM,
4290         },
4291 #endif
4292         {
4293                 .cmd = NL80211_CMD_CONNECT,
4294                 .doit = nl80211_connect,
4295                 .policy = nl80211_policy,
4296                 .flags = GENL_ADMIN_PERM,
4297         },
4298         {
4299                 .cmd = NL80211_CMD_DISCONNECT,
4300                 .doit = nl80211_disconnect,
4301                 .policy = nl80211_policy,
4302                 .flags = GENL_ADMIN_PERM,
4303         },
4304         {
4305                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4306                 .doit = nl80211_wiphy_netns,
4307                 .policy = nl80211_policy,
4308                 .flags = GENL_ADMIN_PERM,
4309         },
4310 };
4311 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4312         .name = "mlme",
4313 };
4314
4315 /* multicast groups */
4316 static struct genl_multicast_group nl80211_config_mcgrp = {
4317         .name = "config",
4318 };
4319 static struct genl_multicast_group nl80211_scan_mcgrp = {
4320         .name = "scan",
4321 };
4322 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4323         .name = "regulatory",
4324 };
4325
4326 /* notification functions */
4327
4328 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4329 {
4330         struct sk_buff *msg;
4331
4332         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4333         if (!msg)
4334                 return;
4335
4336         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4337                 nlmsg_free(msg);
4338                 return;
4339         }
4340
4341         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4342                                 nl80211_config_mcgrp.id, GFP_KERNEL);
4343 }
4344
4345 static int nl80211_add_scan_req(struct sk_buff *msg,
4346                                 struct cfg80211_registered_device *rdev)
4347 {
4348         struct cfg80211_scan_request *req = rdev->scan_req;
4349         struct nlattr *nest;
4350         int i;
4351
4352         ASSERT_RDEV_LOCK(rdev);
4353
4354         if (WARN_ON(!req))
4355                 return 0;
4356
4357         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4358         if (!nest)
4359                 goto nla_put_failure;
4360         for (i = 0; i < req->n_ssids; i++)
4361                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4362         nla_nest_end(msg, nest);
4363
4364         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4365         if (!nest)
4366                 goto nla_put_failure;
4367         for (i = 0; i < req->n_channels; i++)
4368                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4369         nla_nest_end(msg, nest);
4370
4371         if (req->ie)
4372                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4373
4374         return 0;
4375  nla_put_failure:
4376         return -ENOBUFS;
4377 }
4378
4379 static int nl80211_send_scan_msg(struct sk_buff *msg,
4380                                  struct cfg80211_registered_device *rdev,
4381                                  struct net_device *netdev,
4382                                  u32 pid, u32 seq, int flags,
4383                                  u32 cmd)
4384 {
4385         void *hdr;
4386
4387         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4388         if (!hdr)
4389                 return -1;
4390
4391         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4392         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4393
4394         /* ignore errors and send incomplete event anyway */
4395         nl80211_add_scan_req(msg, rdev);
4396
4397         return genlmsg_end(msg, hdr);
4398
4399  nla_put_failure:
4400         genlmsg_cancel(msg, hdr);
4401         return -EMSGSIZE;
4402 }
4403
4404 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4405                              struct net_device *netdev)
4406 {
4407         struct sk_buff *msg;
4408
4409         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4410         if (!msg)
4411                 return;
4412
4413         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4414                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
4415                 nlmsg_free(msg);
4416                 return;
4417         }
4418
4419         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4420                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4421 }
4422
4423 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4424                             struct net_device *netdev)
4425 {
4426         struct sk_buff *msg;
4427
4428         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4429         if (!msg)
4430                 return;
4431
4432         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4433                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4434                 nlmsg_free(msg);
4435                 return;
4436         }
4437
4438         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4439                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4440 }
4441
4442 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4443                                struct net_device *netdev)
4444 {
4445         struct sk_buff *msg;
4446
4447         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4448         if (!msg)
4449                 return;
4450
4451         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4452                                   NL80211_CMD_SCAN_ABORTED) < 0) {
4453                 nlmsg_free(msg);
4454                 return;
4455         }
4456
4457         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4458                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4459 }
4460
4461 /*
4462  * This can happen on global regulatory changes or device specific settings
4463  * based on custom world regulatory domains.
4464  */
4465 void nl80211_send_reg_change_event(struct regulatory_request *request)
4466 {
4467         struct sk_buff *msg;
4468         void *hdr;
4469
4470         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4471         if (!msg)
4472                 return;
4473
4474         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
4475         if (!hdr) {
4476                 nlmsg_free(msg);
4477                 return;
4478         }
4479
4480         /* Userspace can always count this one always being set */
4481         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
4482
4483         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
4484                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4485                            NL80211_REGDOM_TYPE_WORLD);
4486         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
4487                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4488                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
4489         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
4490                  request->intersect)
4491                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4492                            NL80211_REGDOM_TYPE_INTERSECTION);
4493         else {
4494                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4495                            NL80211_REGDOM_TYPE_COUNTRY);
4496                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
4497         }
4498
4499         if (wiphy_idx_valid(request->wiphy_idx))
4500                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
4501
4502         if (genlmsg_end(msg, hdr) < 0) {
4503                 nlmsg_free(msg);
4504                 return;
4505         }
4506
4507         rcu_read_lock();
4508         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
4509                                 GFP_ATOMIC);
4510         rcu_read_unlock();
4511
4512         return;
4513
4514 nla_put_failure:
4515         genlmsg_cancel(msg, hdr);
4516         nlmsg_free(msg);
4517 }
4518
4519 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
4520                                     struct net_device *netdev,
4521                                     const u8 *buf, size_t len,
4522                                     enum nl80211_commands cmd, gfp_t gfp)
4523 {
4524         struct sk_buff *msg;
4525         void *hdr;
4526
4527         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4528         if (!msg)
4529                 return;
4530
4531         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4532         if (!hdr) {
4533                 nlmsg_free(msg);
4534                 return;
4535         }
4536
4537         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4538         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4539         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
4540
4541         if (genlmsg_end(msg, hdr) < 0) {
4542                 nlmsg_free(msg);
4543                 return;
4544         }
4545
4546         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4547                                 nl80211_mlme_mcgrp.id, gfp);
4548         return;
4549
4550  nla_put_failure:
4551         genlmsg_cancel(msg, hdr);
4552         nlmsg_free(msg);
4553 }
4554
4555 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
4556                           struct net_device *netdev, const u8 *buf,
4557                           size_t len, gfp_t gfp)
4558 {
4559         nl80211_send_mlme_event(rdev, netdev, buf, len,
4560                                 NL80211_CMD_AUTHENTICATE, gfp);
4561 }
4562
4563 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
4564                            struct net_device *netdev, const u8 *buf,
4565                            size_t len, gfp_t gfp)
4566 {
4567         nl80211_send_mlme_event(rdev, netdev, buf, len,
4568                                 NL80211_CMD_ASSOCIATE, gfp);
4569 }
4570
4571 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
4572                          struct net_device *netdev, const u8 *buf,
4573                          size_t len, gfp_t gfp)
4574 {
4575         nl80211_send_mlme_event(rdev, netdev, buf, len,
4576                                 NL80211_CMD_DEAUTHENTICATE, gfp);
4577 }
4578
4579 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
4580                            struct net_device *netdev, const u8 *buf,
4581                            size_t len, gfp_t gfp)
4582 {
4583         nl80211_send_mlme_event(rdev, netdev, buf, len,
4584                                 NL80211_CMD_DISASSOCIATE, gfp);
4585 }
4586
4587 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
4588                                       struct net_device *netdev, int cmd,
4589                                       const u8 *addr, gfp_t gfp)
4590 {
4591         struct sk_buff *msg;
4592         void *hdr;
4593
4594         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4595         if (!msg)
4596                 return;
4597
4598         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4599         if (!hdr) {
4600                 nlmsg_free(msg);
4601                 return;
4602         }
4603
4604         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4605         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4606         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
4607         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4608
4609         if (genlmsg_end(msg, hdr) < 0) {
4610                 nlmsg_free(msg);
4611                 return;
4612         }
4613
4614         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4615                                 nl80211_mlme_mcgrp.id, gfp);
4616         return;
4617
4618  nla_put_failure:
4619         genlmsg_cancel(msg, hdr);
4620         nlmsg_free(msg);
4621 }
4622
4623 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
4624                                struct net_device *netdev, const u8 *addr,
4625                                gfp_t gfp)
4626 {
4627         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
4628                                   addr, gfp);
4629 }
4630
4631 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
4632                                 struct net_device *netdev, const u8 *addr,
4633                                 gfp_t gfp)
4634 {
4635         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
4636                                   addr, gfp);
4637 }
4638
4639 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
4640                                  struct net_device *netdev, const u8 *bssid,
4641                                  const u8 *req_ie, size_t req_ie_len,
4642                                  const u8 *resp_ie, size_t resp_ie_len,
4643                                  u16 status, gfp_t gfp)
4644 {
4645         struct sk_buff *msg;
4646         void *hdr;
4647
4648         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4649         if (!msg)
4650                 return;
4651
4652         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
4653         if (!hdr) {
4654                 nlmsg_free(msg);
4655                 return;
4656         }
4657
4658         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4659         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4660         if (bssid)
4661                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4662         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
4663         if (req_ie)
4664                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4665         if (resp_ie)
4666                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4667
4668         if (genlmsg_end(msg, hdr) < 0) {
4669                 nlmsg_free(msg);
4670                 return;
4671         }
4672
4673         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4674                                 nl80211_mlme_mcgrp.id, gfp);
4675         return;
4676
4677  nla_put_failure:
4678         genlmsg_cancel(msg, hdr);
4679         nlmsg_free(msg);
4680
4681 }
4682
4683 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
4684                          struct net_device *netdev, const u8 *bssid,
4685                          const u8 *req_ie, size_t req_ie_len,
4686                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
4687 {
4688         struct sk_buff *msg;
4689         void *hdr;
4690
4691         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4692         if (!msg)
4693                 return;
4694
4695         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
4696         if (!hdr) {
4697                 nlmsg_free(msg);
4698                 return;
4699         }
4700
4701         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4702         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4703         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4704         if (req_ie)
4705                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4706         if (resp_ie)
4707                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4708
4709         if (genlmsg_end(msg, hdr) < 0) {
4710                 nlmsg_free(msg);
4711                 return;
4712         }
4713
4714         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4715                                 nl80211_mlme_mcgrp.id, gfp);
4716         return;
4717
4718  nla_put_failure:
4719         genlmsg_cancel(msg, hdr);
4720         nlmsg_free(msg);
4721
4722 }
4723
4724 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
4725                                struct net_device *netdev, u16 reason,
4726                                const u8 *ie, size_t ie_len, bool from_ap)
4727 {
4728         struct sk_buff *msg;
4729         void *hdr;
4730
4731         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4732         if (!msg)
4733                 return;
4734
4735         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
4736         if (!hdr) {
4737                 nlmsg_free(msg);
4738                 return;
4739         }
4740
4741         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4742         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4743         if (from_ap && reason)
4744                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
4745         if (from_ap)
4746                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
4747         if (ie)
4748                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
4749
4750         if (genlmsg_end(msg, hdr) < 0) {
4751                 nlmsg_free(msg);
4752                 return;
4753         }
4754
4755         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4756                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
4757         return;
4758
4759  nla_put_failure:
4760         genlmsg_cancel(msg, hdr);
4761         nlmsg_free(msg);
4762
4763 }
4764
4765 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
4766                              struct net_device *netdev, const u8 *bssid,
4767                              gfp_t gfp)
4768 {
4769         struct sk_buff *msg;
4770         void *hdr;
4771
4772         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4773         if (!msg)
4774                 return;
4775
4776         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
4777         if (!hdr) {
4778                 nlmsg_free(msg);
4779                 return;
4780         }
4781
4782         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4783         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4784         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4785
4786         if (genlmsg_end(msg, hdr) < 0) {
4787                 nlmsg_free(msg);
4788                 return;
4789         }
4790
4791         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4792                                 nl80211_mlme_mcgrp.id, gfp);
4793         return;
4794
4795  nla_put_failure:
4796         genlmsg_cancel(msg, hdr);
4797         nlmsg_free(msg);
4798 }
4799
4800 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
4801                                  struct net_device *netdev, const u8 *addr,
4802                                  enum nl80211_key_type key_type, int key_id,
4803                                  const u8 *tsc, gfp_t gfp)
4804 {
4805         struct sk_buff *msg;
4806         void *hdr;
4807
4808         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4809         if (!msg)
4810                 return;
4811
4812         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
4813         if (!hdr) {
4814                 nlmsg_free(msg);
4815                 return;
4816         }
4817
4818         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4819         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4820         if (addr)
4821                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4822         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
4823         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
4824         if (tsc)
4825                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
4826
4827         if (genlmsg_end(msg, hdr) < 0) {
4828                 nlmsg_free(msg);
4829                 return;
4830         }
4831
4832         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4833                                 nl80211_mlme_mcgrp.id, gfp);
4834         return;
4835
4836  nla_put_failure:
4837         genlmsg_cancel(msg, hdr);
4838         nlmsg_free(msg);
4839 }
4840
4841 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
4842                                     struct ieee80211_channel *channel_before,
4843                                     struct ieee80211_channel *channel_after)
4844 {
4845         struct sk_buff *msg;
4846         void *hdr;
4847         struct nlattr *nl_freq;
4848
4849         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4850         if (!msg)
4851                 return;
4852
4853         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
4854         if (!hdr) {
4855                 nlmsg_free(msg);
4856                 return;
4857         }
4858
4859         /*
4860          * Since we are applying the beacon hint to a wiphy we know its
4861          * wiphy_idx is valid
4862          */
4863         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
4864
4865         /* Before */
4866         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
4867         if (!nl_freq)
4868                 goto nla_put_failure;
4869         if (nl80211_msg_put_channel(msg, channel_before))
4870                 goto nla_put_failure;
4871         nla_nest_end(msg, nl_freq);
4872
4873         /* After */
4874         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
4875         if (!nl_freq)
4876                 goto nla_put_failure;
4877         if (nl80211_msg_put_channel(msg, channel_after))
4878                 goto nla_put_failure;
4879         nla_nest_end(msg, nl_freq);
4880
4881         if (genlmsg_end(msg, hdr) < 0) {
4882                 nlmsg_free(msg);
4883                 return;
4884         }
4885
4886         rcu_read_lock();
4887         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
4888                                 GFP_ATOMIC);
4889         rcu_read_unlock();
4890
4891         return;
4892
4893 nla_put_failure:
4894         genlmsg_cancel(msg, hdr);
4895         nlmsg_free(msg);
4896 }
4897
4898 /* initialisation/exit functions */
4899
4900 int nl80211_init(void)
4901 {
4902         int err;
4903
4904         err = genl_register_family_with_ops(&nl80211_fam,
4905                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
4906         if (err)
4907                 return err;
4908
4909         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
4910         if (err)
4911                 goto err_out;
4912
4913         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
4914         if (err)
4915                 goto err_out;
4916
4917         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
4918         if (err)
4919                 goto err_out;
4920
4921         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
4922         if (err)
4923                 goto err_out;
4924
4925 #ifdef CONFIG_NL80211_TESTMODE
4926         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
4927         if (err)
4928                 goto err_out;
4929 #endif
4930
4931         return 0;
4932  err_out:
4933         genl_unregister_family(&nl80211_fam);
4934         return err;
4935 }
4936
4937 void nl80211_exit(void)
4938 {
4939         genl_unregister_family(&nl80211_fam);
4940 }