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/genetlink.h>
  18 #include <net/cfg80211.h>
  19 #include "core.h"
  20 #include "nl80211.h"
  21 #include "reg.h"
  22
  23 /* the netlink family */
  24 static struct genl_family nl80211_fam = {
  25         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  26         .name = "nl80211",      /* have users key off the name instead */
  27         .hdrsize = 0,           /* no private header */
  28         .version = 1,           /* no particular meaning now */
  29         .maxattr = NL80211_ATTR_MAX,
  30 };
  31
  32 /* internal helper: get drv and dev */
  33 static int get_drv_dev_by_info_ifindex(struct nlattr **attrs,
  34                                        struct cfg80211_registered_device **drv,
  35                                        struct net_device **dev)
  36 {
  37         int ifindex;
  38
  39         if (!attrs[NL80211_ATTR_IFINDEX])
  40                 return -EINVAL;
  41
  42         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  43         *dev = dev_get_by_index(&init_net, ifindex);
  44         if (!*dev)
  45                 return -ENODEV;
  46
  47         *drv = cfg80211_get_dev_from_ifindex(ifindex);
  48         if (IS_ERR(*drv)) {
  49                 dev_put(*dev);
  50                 return PTR_ERR(*drv);
  51         }
  52
  53         return 0;
  54 }
  55
  56 /* policy for the attributes */
  57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
  58         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  59         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  60                                       .len = BUS_ID_SIZE-1 },
  61         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  62         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  63         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  64         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  65         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  66         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  67         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  68
  69         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  70         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  71         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  72
  73         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  74
  75         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  76                                     .len = WLAN_MAX_KEY_LEN },
  77         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  78         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  79         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  80         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  81
  82         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  83         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  84         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  85                                        .len = IEEE80211_MAX_DATA_LEN },
  86         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  87                                        .len = IEEE80211_MAX_DATA_LEN },
  88         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  89         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  90         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  91         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  92                                                .len = NL80211_MAX_SUPP_RATES },
  93         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
  94         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
  95         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
  96         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
  97                                 .len = IEEE80211_MAX_MESH_ID_LEN },
  98         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
  99
 100         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 101         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 102
 103         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 104         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 105         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 106         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 107                                            .len = NL80211_MAX_SUPP_RATES },
 108
 109         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 110
 111         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 112                                          .len = NL80211_HT_CAPABILITY_LEN },
 113
 114         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 115         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 116                               .len = IEEE80211_MAX_DATA_LEN },
 117         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 118         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 119
 120         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 121                                 .len = IEEE80211_MAX_SSID_LEN },
 122         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 123         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 124         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 125         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 126         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 127         [NL80211_ATTR_STA_FLAGS2] = {
 128                 .len = sizeof(struct nl80211_sta_flag_update),
 129         },
 130         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 131 };
 132
 133 /* IE validation */
 134 static bool is_valid_ie_attr(const struct nlattr *attr)
 135 {
 136         const u8 *pos;
 137         int len;
 138
 139         if (!attr)
 140                 return true;
 141
 142         pos = nla_data(attr);
 143         len = nla_len(attr);
 144
 145         while (len) {
 146                 u8 elemlen;
 147
 148                 if (len < 2)
 149                         return false;
 150                 len -= 2;
 151
 152                 elemlen = pos[1];
 153                 if (elemlen > len)
 154                         return false;
 155
 156                 len -= elemlen;
 157                 pos += 2 + elemlen;
 158         }
 159
 160         return true;
 161 }
 162
 163 /* message building helper */
 164 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 165                                    int flags, u8 cmd)
 166 {
 167         /* since there is no private header just add the generic one */
 168         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 169 }
 170
 171 static int nl80211_msg_put_channel(struct sk_buff *msg,
 172                                    struct ieee80211_channel *chan)
 173 {
 174         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 175                     chan->center_freq);
 176
 177         if (chan->flags & IEEE80211_CHAN_DISABLED)
 178                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 179         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 180                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 181         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 182                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 183         if (chan->flags & IEEE80211_CHAN_RADAR)
 184                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 185
 186         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 187                     DBM_TO_MBM(chan->max_power));
 188
 189         return 0;
 190
 191  nla_put_failure:
 192         return -ENOBUFS;
 193 }
 194
 195 /* netlink command implementations */
 196
 197 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 198                               struct cfg80211_registered_device *dev)
 199 {
 200         void *hdr;
 201         struct nlattr *nl_bands, *nl_band;
 202         struct nlattr *nl_freqs, *nl_freq;
 203         struct nlattr *nl_rates, *nl_rate;
 204         struct nlattr *nl_modes;
 205         struct nlattr *nl_cmds;
 206         enum ieee80211_band band;
 207         struct ieee80211_channel *chan;
 208         struct ieee80211_rate *rate;
 209         int i;
 210         u16 ifmodes = dev->wiphy.interface_modes;
 211
 212         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 213         if (!hdr)
 214                 return -1;
 215
 216         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 217         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 218
 219         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 220                    dev->wiphy.retry_short);
 221         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 222                    dev->wiphy.retry_long);
 223         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 224                     dev->wiphy.frag_threshold);
 225         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 226                     dev->wiphy.rts_threshold);
 227
 228         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 229                    dev->wiphy.max_scan_ssids);
 230         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 231                     dev->wiphy.max_scan_ie_len);
 232
 233         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 234                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 235                 dev->wiphy.cipher_suites);
 236
 237         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 238         if (!nl_modes)
 239                 goto nla_put_failure;
 240
 241         i = 0;
 242         while (ifmodes) {
 243                 if (ifmodes & 1)
 244                         NLA_PUT_FLAG(msg, i);
 245                 ifmodes >>= 1;
 246                 i++;
 247         }
 248
 249         nla_nest_end(msg, nl_modes);
 250
 251         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 252         if (!nl_bands)
 253                 goto nla_put_failure;
 254
 255         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 256                 if (!dev->wiphy.bands[band])
 257                         continue;
 258
 259                 nl_band = nla_nest_start(msg, band);
 260                 if (!nl_band)
 261                         goto nla_put_failure;
 262
 263                 /* add HT info */
 264                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 265                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 266                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 267                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 268                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 269                                 dev->wiphy.bands[band]->ht_cap.cap);
 270                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 271                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 272                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 273                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 274                 }
 275
 276                 /* add frequencies */
 277                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 278                 if (!nl_freqs)
 279                         goto nla_put_failure;
 280
 281                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 282                         nl_freq = nla_nest_start(msg, i);
 283                         if (!nl_freq)
 284                                 goto nla_put_failure;
 285
 286                         chan = &dev->wiphy.bands[band]->channels[i];
 287
 288                         if (nl80211_msg_put_channel(msg, chan))
 289                                 goto nla_put_failure;
 290
 291                         nla_nest_end(msg, nl_freq);
 292                 }
 293
 294                 nla_nest_end(msg, nl_freqs);
 295
 296                 /* add bitrates */
 297                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 298                 if (!nl_rates)
 299                         goto nla_put_failure;
 300
 301                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 302                         nl_rate = nla_nest_start(msg, i);
 303                         if (!nl_rate)
 304                                 goto nla_put_failure;
 305
 306                         rate = &dev->wiphy.bands[band]->bitrates[i];
 307                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 308                                     rate->bitrate);
 309                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 310                                 NLA_PUT_FLAG(msg,
 311                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 312
 313                         nla_nest_end(msg, nl_rate);
 314                 }
 315
 316                 nla_nest_end(msg, nl_rates);
 317
 318                 nla_nest_end(msg, nl_band);
 319         }
 320         nla_nest_end(msg, nl_bands);
 321
 322         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 323         if (!nl_cmds)
 324                 goto nla_put_failure;
 325
 326         i = 0;
 327 #define CMD(op, n)                                              \
 328          do {                                                   \
 329                 if (dev->ops->op) {                             \
 330                         i++;                                    \
 331                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 332                 }                                               \
 333         } while (0)
 334
 335         CMD(add_virtual_intf, NEW_INTERFACE);
 336         CMD(change_virtual_intf, SET_INTERFACE);
 337         CMD(add_key, NEW_KEY);
 338         CMD(add_beacon, NEW_BEACON);
 339         CMD(add_station, NEW_STATION);
 340         CMD(add_mpath, NEW_MPATH);
 341         CMD(set_mesh_params, SET_MESH_PARAMS);
 342         CMD(change_bss, SET_BSS);
 343         CMD(auth, AUTHENTICATE);
 344         CMD(assoc, ASSOCIATE);
 345         CMD(deauth, DEAUTHENTICATE);
 346         CMD(disassoc, DISASSOCIATE);
 347         CMD(join_ibss, JOIN_IBSS);
 348
 349 #undef CMD
 350         nla_nest_end(msg, nl_cmds);
 351
 352         return genlmsg_end(msg, hdr);
 353
 354  nla_put_failure:
 355         genlmsg_cancel(msg, hdr);
 356         return -EMSGSIZE;
 357 }
 358
 359 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 360 {
 361         int idx = 0;
 362         int start = cb->args[0];
 363         struct cfg80211_registered_device *dev;
 364
 365         mutex_lock(&cfg80211_mutex);
 366         list_for_each_entry(dev, &cfg80211_drv_list, list) {
 367                 if (++idx <= start)
 368                         continue;
 369                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 370                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 371                                        dev) < 0) {
 372                         idx--;
 373                         break;
 374                 }
 375         }
 376         mutex_unlock(&cfg80211_mutex);
 377
 378         cb->args[0] = idx;
 379
 380         return skb->len;
 381 }
 382
 383 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 384 {
 385         struct sk_buff *msg;
 386         struct cfg80211_registered_device *dev;
 387
 388         dev = cfg80211_get_dev_from_info(info);
 389         if (IS_ERR(dev))
 390                 return PTR_ERR(dev);
 391
 392         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 393         if (!msg)
 394                 goto out_err;
 395
 396         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 397                 goto out_free;
 398
 399         cfg80211_put_dev(dev);
 400
 401         return genlmsg_unicast(msg, info->snd_pid);
 402
 403  out_free:
 404         nlmsg_free(msg);
 405  out_err:
 406         cfg80211_put_dev(dev);
 407         return -ENOBUFS;
 408 }
 409
 410 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 411         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 412         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 413         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 414         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 415         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 416 };
 417
 418 static int parse_txq_params(struct nlattr *tb[],
 419                             struct ieee80211_txq_params *txq_params)
 420 {
 421         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 422             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 423             !tb[NL80211_TXQ_ATTR_AIFS])
 424                 return -EINVAL;
 425
 426         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 427         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 428         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 429         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 430         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 431
 432         return 0;
 433 }
 434
 435 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 436 {
 437         struct cfg80211_registered_device *rdev;
 438         int result = 0, rem_txq_params = 0;
 439         struct nlattr *nl_txq_params;
 440         u32 changed;
 441         u8 retry_short = 0, retry_long = 0;
 442         u32 frag_threshold = 0, rts_threshold = 0;
 443
 444         rtnl_lock();
 445
 446         mutex_lock(&cfg80211_mutex);
 447
 448         rdev = __cfg80211_drv_from_info(info);
 449         if (IS_ERR(rdev)) {
 450                 result = PTR_ERR(rdev);
 451                 goto unlock;
 452         }
 453
 454         mutex_lock(&rdev->mtx);
 455
 456         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 457                 result = cfg80211_dev_rename(
 458                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 459
 460         mutex_unlock(&cfg80211_mutex);
 461
 462         if (result)
 463                 goto bad_res;
 464
 465         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 466                 struct ieee80211_txq_params txq_params;
 467                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 468
 469                 if (!rdev->ops->set_txq_params) {
 470                         result = -EOPNOTSUPP;
 471                         goto bad_res;
 472                 }
 473
 474                 nla_for_each_nested(nl_txq_params,
 475                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 476                                     rem_txq_params) {
 477                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 478                                   nla_data(nl_txq_params),
 479                                   nla_len(nl_txq_params),
 480                                   txq_params_policy);
 481                         result = parse_txq_params(tb, &txq_params);
 482                         if (result)
 483                                 goto bad_res;
 484
 485                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 486                                                            &txq_params);
 487                         if (result)
 488                                 goto bad_res;
 489                 }
 490         }
 491
 492         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 493                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 494                 struct ieee80211_channel *chan;
 495                 struct ieee80211_sta_ht_cap *ht_cap;
 496                 u32 freq;
 497
 498                 if (!rdev->ops->set_channel) {
 499                         result = -EOPNOTSUPP;
 500                         goto bad_res;
 501                 }
 502
 503                 result = -EINVAL;
 504
 505                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 506                         channel_type = nla_get_u32(info->attrs[
 507                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 508                         if (channel_type != NL80211_CHAN_NO_HT &&
 509                             channel_type != NL80211_CHAN_HT20 &&
 510                             channel_type != NL80211_CHAN_HT40PLUS &&
 511                             channel_type != NL80211_CHAN_HT40MINUS)
 512                                 goto bad_res;
 513                 }
 514
 515                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 516                 chan = ieee80211_get_channel(&rdev->wiphy, freq);
 517
 518                 /* Primary channel not allowed */
 519                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 520                         goto bad_res;
 521
 522                 if (channel_type == NL80211_CHAN_HT40MINUS &&
 523                     (chan->flags & IEEE80211_CHAN_NO_HT40MINUS))
 524                         goto bad_res;
 525                 else if (channel_type == NL80211_CHAN_HT40PLUS &&
 526                          (chan->flags & IEEE80211_CHAN_NO_HT40PLUS))
 527                         goto bad_res;
 528
 529                 /*
 530                  * At this point we know if that if HT40 was requested
 531                  * we are allowed to use it and the extension channel
 532                  * exists.
 533                  */
 534
 535                 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
 536
 537                 /* no HT capabilities or intolerant */
 538                 if (channel_type != NL80211_CHAN_NO_HT) {
 539                         if (!ht_cap->ht_supported)
 540                                 goto bad_res;
 541                         if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
 542                             (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
 543                                 goto bad_res;
 544                 }
 545
 546                 result = rdev->ops->set_channel(&rdev->wiphy, chan,
 547                                                 channel_type);
 548                 if (result)
 549                         goto bad_res;
 550         }
 551
 552         changed = 0;
 553
 554         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 555                 retry_short = nla_get_u8(
 556                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 557                 if (retry_short == 0) {
 558                         result = -EINVAL;
 559                         goto bad_res;
 560                 }
 561                 changed |= WIPHY_PARAM_RETRY_SHORT;
 562         }
 563
 564         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 565                 retry_long = nla_get_u8(
 566                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 567                 if (retry_long == 0) {
 568                         result = -EINVAL;
 569                         goto bad_res;
 570                 }
 571                 changed |= WIPHY_PARAM_RETRY_LONG;
 572         }
 573
 574         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 575                 frag_threshold = nla_get_u32(
 576                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 577                 if (frag_threshold < 256) {
 578                         result = -EINVAL;
 579                         goto bad_res;
 580                 }
 581                 if (frag_threshold != (u32) -1) {
 582                         /*
 583                          * Fragments (apart from the last one) are required to
 584                          * have even length. Make the fragmentation code
 585                          * simpler by stripping LSB should someone try to use
 586                          * odd threshold value.
 587                          */
 588                         frag_threshold &= ~0x1;
 589                 }
 590                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 591         }
 592
 593         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 594                 rts_threshold = nla_get_u32(
 595                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 596                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 597         }
 598
 599         if (changed) {
 600                 u8 old_retry_short, old_retry_long;
 601                 u32 old_frag_threshold, old_rts_threshold;
 602
 603                 if (!rdev->ops->set_wiphy_params) {
 604                         result = -EOPNOTSUPP;
 605                         goto bad_res;
 606                 }
 607
 608                 old_retry_short = rdev->wiphy.retry_short;
 609                 old_retry_long = rdev->wiphy.retry_long;
 610                 old_frag_threshold = rdev->wiphy.frag_threshold;
 611                 old_rts_threshold = rdev->wiphy.rts_threshold;
 612
 613                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 614                         rdev->wiphy.retry_short = retry_short;
 615                 if (changed & WIPHY_PARAM_RETRY_LONG)
 616                         rdev->wiphy.retry_long = retry_long;
 617                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 618                         rdev->wiphy.frag_threshold = frag_threshold;
 619                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 620                         rdev->wiphy.rts_threshold = rts_threshold;
 621
 622                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 623                 if (result) {
 624                         rdev->wiphy.retry_short = old_retry_short;
 625                         rdev->wiphy.retry_long = old_retry_long;
 626                         rdev->wiphy.frag_threshold = old_frag_threshold;
 627                         rdev->wiphy.rts_threshold = old_rts_threshold;
 628                 }
 629         }
 630
 631  bad_res:
 632         mutex_unlock(&rdev->mtx);
 633  unlock:
 634         rtnl_unlock();
 635         return result;
 636 }
 637
 638
 639 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 640                               struct cfg80211_registered_device *rdev,
 641                               struct net_device *dev)
 642 {
 643         void *hdr;
 644
 645         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 646         if (!hdr)
 647                 return -1;
 648
 649         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 650         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 651         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 652         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 653         return genlmsg_end(msg, hdr);
 654
 655  nla_put_failure:
 656         genlmsg_cancel(msg, hdr);
 657         return -EMSGSIZE;
 658 }
 659
 660 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 661 {
 662         int wp_idx = 0;
 663         int if_idx = 0;
 664         int wp_start = cb->args[0];
 665         int if_start = cb->args[1];
 666         struct cfg80211_registered_device *dev;
 667         struct wireless_dev *wdev;
 668
 669         mutex_lock(&cfg80211_mutex);
 670         list_for_each_entry(dev, &cfg80211_drv_list, list) {
 671                 if (wp_idx < wp_start) {
 672                         wp_idx++;
 673                         continue;
 674                 }
 675                 if_idx = 0;
 676
 677                 mutex_lock(&dev->devlist_mtx);
 678                 list_for_each_entry(wdev, &dev->netdev_list, list) {
 679                         if (if_idx < if_start) {
 680                                 if_idx++;
 681                                 continue;
 682                         }
 683                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 684                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 685                                                dev, wdev->netdev) < 0) {
 686                                 mutex_unlock(&dev->devlist_mtx);
 687                                 goto out;
 688                         }
 689                         if_idx++;
 690                 }
 691                 mutex_unlock(&dev->devlist_mtx);
 692
 693                 wp_idx++;
 694         }
 695  out:
 696         mutex_unlock(&cfg80211_mutex);
 697
 698         cb->args[0] = wp_idx;
 699         cb->args[1] = if_idx;
 700
 701         return skb->len;
 702 }
 703
 704 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 705 {
 706         struct sk_buff *msg;
 707         struct cfg80211_registered_device *dev;
 708         struct net_device *netdev;
 709         int err;
 710
 711         err = get_drv_dev_by_info_ifindex(info->attrs, &dev, &netdev);
 712         if (err)
 713                 return err;
 714
 715         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 716         if (!msg)
 717                 goto out_err;
 718
 719         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
 720                                dev, netdev) < 0)
 721                 goto out_free;
 722
 723         dev_put(netdev);
 724         cfg80211_put_dev(dev);
 725
 726         return genlmsg_unicast(msg, info->snd_pid);
 727
 728  out_free:
 729         nlmsg_free(msg);
 730  out_err:
 731         dev_put(netdev);
 732         cfg80211_put_dev(dev);
 733         return -ENOBUFS;
 734 }
 735
 736 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 737         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 738         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 739         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 740         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 741         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 742 };
 743
 744 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 745 {
 746         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 747         int flag;
 748
 749         *mntrflags = 0;
 750
 751         if (!nla)
 752                 return -EINVAL;
 753
 754         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 755                              nla, mntr_flags_policy))
 756                 return -EINVAL;
 757
 758         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 759                 if (flags[flag])
 760                         *mntrflags |= (1<<flag);
 761
 762         return 0;
 763 }
 764
 765 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 766 {
 767         struct cfg80211_registered_device *drv;
 768         struct vif_params params;
 769         int err, ifindex;
 770         enum nl80211_iftype otype, ntype;
 771         struct net_device *dev;
 772         u32 _flags, *flags = NULL;
 773         bool change = false;
 774
 775         memset(&params, 0, sizeof(params));
 776
 777         rtnl_lock();
 778
 779         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 780         if (err)
 781                 goto unlock_rtnl;
 782
 783         ifindex = dev->ifindex;
 784         otype = ntype = dev->ieee80211_ptr->iftype;
 785         dev_put(dev);
 786
 787         if (info->attrs[NL80211_ATTR_IFTYPE]) {
 788                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
 789                 if (otype != ntype)
 790                         change = true;
 791                 if (ntype > NL80211_IFTYPE_MAX) {
 792                         err = -EINVAL;
 793                         goto unlock;
 794                 }
 795         }
 796
 797         if (!drv->ops->change_virtual_intf ||
 798             !(drv->wiphy.interface_modes & (1 << ntype))) {
 799                 err = -EOPNOTSUPP;
 800                 goto unlock;
 801         }
 802
 803         if (info->attrs[NL80211_ATTR_MESH_ID]) {
 804                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
 805                         err = -EINVAL;
 806                         goto unlock;
 807                 }
 808                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
 809                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
 810                 change = true;
 811         }
 812
 813         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
 814                 if (ntype != NL80211_IFTYPE_MONITOR) {
 815                         err = -EINVAL;
 816                         goto unlock;
 817                 }
 818                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
 819                                           &_flags);
 820                 if (err)
 821                         goto unlock;
 822
 823                 flags = &_flags;
 824                 change = true;
 825         }
 826
 827         if (change)
 828                 err = drv->ops->change_virtual_intf(&drv->wiphy, ifindex,
 829                                                     ntype, flags, &params);
 830         else
 831                 err = 0;
 832
 833         dev = __dev_get_by_index(&init_net, ifindex);
 834         WARN_ON(!dev || (!err && dev->ieee80211_ptr->iftype != ntype));
 835
 836         if (dev && !err && (ntype != otype)) {
 837                 if (otype == NL80211_IFTYPE_ADHOC)
 838                         cfg80211_clear_ibss(dev, false);
 839         }
 840
 841  unlock:
 842         cfg80211_put_dev(drv);
 843  unlock_rtnl:
 844         rtnl_unlock();
 845         return err;
 846 }
 847
 848 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
 849 {
 850         struct cfg80211_registered_device *drv;
 851         struct vif_params params;
 852         int err;
 853         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
 854         u32 flags;
 855
 856         memset(&params, 0, sizeof(params));
 857
 858         if (!info->attrs[NL80211_ATTR_IFNAME])
 859                 return -EINVAL;
 860
 861         if (info->attrs[NL80211_ATTR_IFTYPE]) {
 862                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
 863                 if (type > NL80211_IFTYPE_MAX)
 864                         return -EINVAL;
 865         }
 866
 867         rtnl_lock();
 868
 869         drv = cfg80211_get_dev_from_info(info);
 870         if (IS_ERR(drv)) {
 871                 err = PTR_ERR(drv);
 872                 goto unlock_rtnl;
 873         }
 874
 875         if (!drv->ops->add_virtual_intf ||
 876             !(drv->wiphy.interface_modes & (1 << type))) {
 877                 err = -EOPNOTSUPP;
 878                 goto unlock;
 879         }
 880
 881         if (type == NL80211_IFTYPE_MESH_POINT &&
 882             info->attrs[NL80211_ATTR_MESH_ID]) {
 883                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
 884                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
 885         }
 886
 887         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
 888                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
 889                                   &flags);
 890         err = drv->ops->add_virtual_intf(&drv->wiphy,
 891                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
 892                 type, err ? NULL : &flags, &params);
 893
 894  unlock:
 895         cfg80211_put_dev(drv);
 896  unlock_rtnl:
 897         rtnl_unlock();
 898         return err;
 899 }
 900
 901 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
 902 {
 903         struct cfg80211_registered_device *drv;
 904         int ifindex, err;
 905         struct net_device *dev;
 906
 907         rtnl_lock();
 908
 909         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 910         if (err)
 911                 goto unlock_rtnl;
 912         ifindex = dev->ifindex;
 913         dev_put(dev);
 914
 915         if (!drv->ops->del_virtual_intf) {
 916                 err = -EOPNOTSUPP;
 917                 goto out;
 918         }
 919
 920         err = drv->ops->del_virtual_intf(&drv->wiphy, ifindex);
 921
 922  out:
 923         cfg80211_put_dev(drv);
 924  unlock_rtnl:
 925         rtnl_unlock();
 926         return err;
 927 }
 928
 929 struct get_key_cookie {
 930         struct sk_buff *msg;
 931         int error;
 932 };
 933
 934 static void get_key_callback(void *c, struct key_params *params)
 935 {
 936         struct get_key_cookie *cookie = c;
 937
 938         if (params->key)
 939                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
 940                         params->key_len, params->key);
 941
 942         if (params->seq)
 943                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
 944                         params->seq_len, params->seq);
 945
 946         if (params->cipher)
 947                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
 948                             params->cipher);
 949
 950         return;
 951  nla_put_failure:
 952         cookie->error = 1;
 953 }
 954
 955 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
 956 {
 957         struct cfg80211_registered_device *drv;
 958         int err;
 959         struct net_device *dev;
 960         u8 key_idx = 0;
 961         u8 *mac_addr = NULL;
 962         struct get_key_cookie cookie = {
 963                 .error = 0,
 964         };
 965         void *hdr;
 966         struct sk_buff *msg;
 967
 968         if (info->attrs[NL80211_ATTR_KEY_IDX])
 969                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 970
 971         if (key_idx > 5)
 972                 return -EINVAL;
 973
 974         if (info->attrs[NL80211_ATTR_MAC])
 975                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
 976
 977         rtnl_lock();
 978
 979         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
 980         if (err)
 981                 goto unlock_rtnl;
 982
 983         if (!drv->ops->get_key) {
 984                 err = -EOPNOTSUPP;
 985                 goto out;
 986         }
 987
 988         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 989         if (!msg) {
 990                 err = -ENOMEM;
 991                 goto out;
 992         }
 993
 994         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
 995                              NL80211_CMD_NEW_KEY);
 996
 997         if (IS_ERR(hdr)) {
 998                 err = PTR_ERR(hdr);
 999                 goto out;
1000         }
1001
1002         cookie.msg = msg;
1003
1004         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1005         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1006         if (mac_addr)
1007                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1008
1009         err = drv->ops->get_key(&drv->wiphy, dev, key_idx, mac_addr,
1010                                 &cookie, get_key_callback);
1011
1012         if (err)
1013                 goto out;
1014
1015         if (cookie.error)
1016                 goto nla_put_failure;
1017
1018         genlmsg_end(msg, hdr);
1019         err = genlmsg_unicast(msg, info->snd_pid);
1020         goto out;
1021
1022  nla_put_failure:
1023         err = -ENOBUFS;
1024         nlmsg_free(msg);
1025  out:
1026         cfg80211_put_dev(drv);
1027         dev_put(dev);
1028  unlock_rtnl:
1029         rtnl_unlock();
1030
1031         return err;
1032 }
1033
1034 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1035 {
1036         struct cfg80211_registered_device *drv;
1037         int err;
1038         struct net_device *dev;
1039         u8 key_idx;
1040         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1041                     u8 key_index);
1042
1043         if (!info->attrs[NL80211_ATTR_KEY_IDX])
1044                 return -EINVAL;
1045
1046         key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1047
1048         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]) {
1049                 if (key_idx < 4 || key_idx > 5)
1050                         return -EINVAL;
1051         } else if (key_idx > 3)
1052                 return -EINVAL;
1053
1054         /* currently only support setting default key */
1055         if (!info->attrs[NL80211_ATTR_KEY_DEFAULT] &&
1056             !info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT])
1057                 return -EINVAL;
1058
1059         rtnl_lock();
1060
1061         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1062         if (err)
1063                 goto unlock_rtnl;
1064
1065         if (info->attrs[NL80211_ATTR_KEY_DEFAULT])
1066                 func = drv->ops->set_default_key;
1067         else
1068                 func = drv->ops->set_default_mgmt_key;
1069
1070         if (!func) {
1071                 err = -EOPNOTSUPP;
1072                 goto out;
1073         }
1074
1075         err = func(&drv->wiphy, dev, key_idx);
1076 #ifdef CONFIG_WIRELESS_EXT
1077         if (!err) {
1078                 if (func == drv->ops->set_default_key)
1079                         dev->ieee80211_ptr->wext.default_key = key_idx;
1080                 else
1081                         dev->ieee80211_ptr->wext.default_mgmt_key = key_idx;
1082         }
1083 #endif
1084
1085  out:
1086         cfg80211_put_dev(drv);
1087         dev_put(dev);
1088
1089  unlock_rtnl:
1090         rtnl_unlock();
1091
1092         return err;
1093 }
1094
1095 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1096 {
1097         struct cfg80211_registered_device *drv;
1098         int err, i;
1099         struct net_device *dev;
1100         struct key_params params;
1101         u8 key_idx = 0;
1102         u8 *mac_addr = NULL;
1103
1104         memset(&params, 0, sizeof(params));
1105
1106         if (!info->attrs[NL80211_ATTR_KEY_CIPHER])
1107                 return -EINVAL;
1108
1109         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
1110                 params.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
1111                 params.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
1112         }
1113
1114         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
1115                 params.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
1116                 params.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
1117         }
1118
1119         if (info->attrs[NL80211_ATTR_KEY_IDX])
1120                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1121
1122         params.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
1123
1124         if (info->attrs[NL80211_ATTR_MAC])
1125                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1126
1127         if (cfg80211_validate_key_settings(&params, key_idx, mac_addr))
1128                 return -EINVAL;
1129
1130         rtnl_lock();
1131
1132         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1133         if (err)
1134                 goto unlock_rtnl;
1135
1136         for (i = 0; i < drv->wiphy.n_cipher_suites; i++)
1137                 if (params.cipher == drv->wiphy.cipher_suites[i])
1138                         break;
1139         if (i == drv->wiphy.n_cipher_suites) {
1140                 err = -EINVAL;
1141                 goto out;
1142         }
1143
1144         if (!drv->ops->add_key) {
1145                 err = -EOPNOTSUPP;
1146                 goto out;
1147         }
1148
1149         err = drv->ops->add_key(&drv->wiphy, dev, key_idx, mac_addr, &params);
1150
1151  out:
1152         cfg80211_put_dev(drv);
1153         dev_put(dev);
1154  unlock_rtnl:
1155         rtnl_unlock();
1156
1157         return err;
1158 }
1159
1160 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1161 {
1162         struct cfg80211_registered_device *drv;
1163         int err;
1164         struct net_device *dev;
1165         u8 key_idx = 0;
1166         u8 *mac_addr = NULL;
1167
1168         if (info->attrs[NL80211_ATTR_KEY_IDX])
1169                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1170
1171         if (key_idx > 5)
1172                 return -EINVAL;
1173
1174         if (info->attrs[NL80211_ATTR_MAC])
1175                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1176
1177         rtnl_lock();
1178
1179         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1180         if (err)
1181                 goto unlock_rtnl;
1182
1183         if (!drv->ops->del_key) {
1184                 err = -EOPNOTSUPP;
1185                 goto out;
1186         }
1187
1188         err = drv->ops->del_key(&drv->wiphy, dev, key_idx, mac_addr);
1189
1190 #ifdef CONFIG_WIRELESS_EXT
1191         if (!err) {
1192                 if (key_idx == dev->ieee80211_ptr->wext.default_key)
1193                         dev->ieee80211_ptr->wext.default_key = -1;
1194                 else if (key_idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1195                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1196         }
1197 #endif
1198
1199  out:
1200         cfg80211_put_dev(drv);
1201         dev_put(dev);
1202
1203  unlock_rtnl:
1204         rtnl_unlock();
1205
1206         return err;
1207 }
1208
1209 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1210 {
1211         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1212                     struct beacon_parameters *info);
1213         struct cfg80211_registered_device *drv;
1214         int err;
1215         struct net_device *dev;
1216         struct beacon_parameters params;
1217         int haveinfo = 0;
1218
1219         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1220                 return -EINVAL;
1221
1222         rtnl_lock();
1223
1224         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1225         if (err)
1226                 goto unlock_rtnl;
1227
1228         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1229                 err = -EOPNOTSUPP;
1230                 goto out;
1231         }
1232
1233         switch (info->genlhdr->cmd) {
1234         case NL80211_CMD_NEW_BEACON:
1235                 /* these are required for NEW_BEACON */
1236                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1237                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1238                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1239                         err = -EINVAL;
1240                         goto out;
1241                 }
1242
1243                 call = drv->ops->add_beacon;
1244                 break;
1245         case NL80211_CMD_SET_BEACON:
1246                 call = drv->ops->set_beacon;
1247                 break;
1248         default:
1249                 WARN_ON(1);
1250                 err = -EOPNOTSUPP;
1251                 goto out;
1252         }
1253
1254         if (!call) {
1255                 err = -EOPNOTSUPP;
1256                 goto out;
1257         }
1258
1259         memset(&params, 0, sizeof(params));
1260
1261         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1262                 params.interval =
1263                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1264                 haveinfo = 1;
1265         }
1266
1267         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1268                 params.dtim_period =
1269                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1270                 haveinfo = 1;
1271         }
1272
1273         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1274                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1275                 params.head_len =
1276                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1277                 haveinfo = 1;
1278         }
1279
1280         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1281                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1282                 params.tail_len =
1283                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1284                 haveinfo = 1;
1285         }
1286
1287         if (!haveinfo) {
1288                 err = -EINVAL;
1289                 goto out;
1290         }
1291
1292         err = call(&drv->wiphy, dev, &params);
1293
1294  out:
1295         cfg80211_put_dev(drv);
1296         dev_put(dev);
1297  unlock_rtnl:
1298         rtnl_unlock();
1299
1300         return err;
1301 }
1302
1303 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1304 {
1305         struct cfg80211_registered_device *drv;
1306         int err;
1307         struct net_device *dev;
1308
1309         rtnl_lock();
1310
1311         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1312         if (err)
1313                 goto unlock_rtnl;
1314
1315         if (!drv->ops->del_beacon) {
1316                 err = -EOPNOTSUPP;
1317                 goto out;
1318         }
1319
1320         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1321                 err = -EOPNOTSUPP;
1322                 goto out;
1323         }
1324         err = drv->ops->del_beacon(&drv->wiphy, dev);
1325
1326  out:
1327         cfg80211_put_dev(drv);
1328         dev_put(dev);
1329  unlock_rtnl:
1330         rtnl_unlock();
1331
1332         return err;
1333 }
1334
1335 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1336         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1337         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1338         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1339         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1340 };
1341
1342 static int parse_station_flags(struct genl_info *info,
1343                                struct station_parameters *params)
1344 {
1345         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1346         struct nlattr *nla;
1347         int flag;
1348
1349         /*
1350          * Try parsing the new attribute first so userspace
1351          * can specify both for older kernels.
1352          */
1353         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1354         if (nla) {
1355                 struct nl80211_sta_flag_update *sta_flags;
1356
1357                 sta_flags = nla_data(nla);
1358                 params->sta_flags_mask = sta_flags->mask;
1359                 params->sta_flags_set = sta_flags->set;
1360                 if ((params->sta_flags_mask |
1361                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1362                         return -EINVAL;
1363                 return 0;
1364         }
1365
1366         /* if present, parse the old attribute */
1367
1368         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1369         if (!nla)
1370                 return 0;
1371
1372         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1373                              nla, sta_flags_policy))
1374                 return -EINVAL;
1375
1376         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1377         params->sta_flags_mask &= ~1;
1378
1379         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1380                 if (flags[flag])
1381                         params->sta_flags_set |= (1<<flag);
1382
1383         return 0;
1384 }
1385
1386 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1387 {
1388         int modulation, streams, bitrate;
1389
1390         if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1391                 return rate->legacy;
1392
1393         /* the formula below does only work for MCS values smaller than 32 */
1394         if (rate->mcs >= 32)
1395                 return 0;
1396
1397         modulation = rate->mcs & 7;
1398         streams = (rate->mcs >> 3) + 1;
1399
1400         bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1401                         13500000 : 6500000;
1402
1403         if (modulation < 4)
1404                 bitrate *= (modulation + 1);
1405         else if (modulation == 4)
1406                 bitrate *= (modulation + 2);
1407         else
1408                 bitrate *= (modulation + 3);
1409
1410         bitrate *= streams;
1411
1412         if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1413                 bitrate = (bitrate / 9) * 10;
1414
1415         /* do NOT round down here */
1416         return (bitrate + 50000) / 100000;
1417 }
1418
1419 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1420                                 int flags, struct net_device *dev,
1421                                 u8 *mac_addr, struct station_info *sinfo)
1422 {
1423         void *hdr;
1424         struct nlattr *sinfoattr, *txrate;
1425         u16 bitrate;
1426
1427         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1428         if (!hdr)
1429                 return -1;
1430
1431         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1432         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1433
1434         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1435         if (!sinfoattr)
1436                 goto nla_put_failure;
1437         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1438                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1439                             sinfo->inactive_time);
1440         if (sinfo->filled & STATION_INFO_RX_BYTES)
1441                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1442                             sinfo->rx_bytes);
1443         if (sinfo->filled & STATION_INFO_TX_BYTES)
1444                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1445                             sinfo->tx_bytes);
1446         if (sinfo->filled & STATION_INFO_LLID)
1447                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1448                             sinfo->llid);
1449         if (sinfo->filled & STATION_INFO_PLID)
1450                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1451                             sinfo->plid);
1452         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1453                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1454                             sinfo->plink_state);
1455         if (sinfo->filled & STATION_INFO_SIGNAL)
1456                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1457                            sinfo->signal);
1458         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1459                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1460                 if (!txrate)
1461                         goto nla_put_failure;
1462
1463                 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1464                 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1465                 if (bitrate > 0)
1466                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1467
1468                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1469                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1470                                     sinfo->txrate.mcs);
1471                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1472                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1473                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1474                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1475
1476                 nla_nest_end(msg, txrate);
1477         }
1478         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1479                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1480                             sinfo->rx_packets);
1481         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1482                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1483                             sinfo->tx_packets);
1484         nla_nest_end(msg, sinfoattr);
1485
1486         return genlmsg_end(msg, hdr);
1487
1488  nla_put_failure:
1489         genlmsg_cancel(msg, hdr);
1490         return -EMSGSIZE;
1491 }
1492
1493 static int nl80211_dump_station(struct sk_buff *skb,
1494                                 struct netlink_callback *cb)
1495 {
1496         struct station_info sinfo;
1497         struct cfg80211_registered_device *dev;
1498         struct net_device *netdev;
1499         u8 mac_addr[ETH_ALEN];
1500         int ifidx = cb->args[0];
1501         int sta_idx = cb->args[1];
1502         int err;
1503
1504         if (!ifidx) {
1505                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1506                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1507                                   nl80211_policy);
1508                 if (err)
1509                         return err;
1510
1511                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1512                         return -EINVAL;
1513
1514                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1515                 if (!ifidx)
1516                         return -EINVAL;
1517         }
1518
1519         rtnl_lock();
1520
1521         netdev = __dev_get_by_index(&init_net, ifidx);
1522         if (!netdev) {
1523                 err = -ENODEV;
1524                 goto out_rtnl;
1525         }
1526
1527         dev = cfg80211_get_dev_from_ifindex(ifidx);
1528         if (IS_ERR(dev)) {
1529                 err = PTR_ERR(dev);
1530                 goto out_rtnl;
1531         }
1532
1533         if (!dev->ops->dump_station) {
1534                 err = -EOPNOTSUPP;
1535                 goto out_err;
1536         }
1537
1538         while (1) {
1539                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1540                                              mac_addr, &sinfo);
1541                 if (err == -ENOENT)
1542                         break;
1543                 if (err)
1544                         goto out_err;
1545
1546                 if (nl80211_send_station(skb,
1547                                 NETLINK_CB(cb->skb).pid,
1548                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1549                                 netdev, mac_addr,
1550                                 &sinfo) < 0)
1551                         goto out;
1552
1553                 sta_idx++;
1554         }
1555
1556
1557  out:
1558         cb->args[1] = sta_idx;
1559         err = skb->len;
1560  out_err:
1561         cfg80211_put_dev(dev);
1562  out_rtnl:
1563         rtnl_unlock();
1564
1565         return err;
1566 }
1567
1568 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1569 {
1570         struct cfg80211_registered_device *drv;
1571         int err;
1572         struct net_device *dev;
1573         struct station_info sinfo;
1574         struct sk_buff *msg;
1575         u8 *mac_addr = NULL;
1576
1577         memset(&sinfo, 0, sizeof(sinfo));
1578
1579         if (!info->attrs[NL80211_ATTR_MAC])
1580                 return -EINVAL;
1581
1582         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1583
1584         rtnl_lock();
1585
1586         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1587         if (err)
1588                 goto out_rtnl;
1589
1590         if (!drv->ops->get_station) {
1591                 err = -EOPNOTSUPP;
1592                 goto out;
1593         }
1594
1595         err = drv->ops->get_station(&drv->wiphy, dev, mac_addr, &sinfo);
1596         if (err)
1597                 goto out;
1598
1599         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1600         if (!msg)
1601                 goto out;
1602
1603         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1604                                  dev, mac_addr, &sinfo) < 0)
1605                 goto out_free;
1606
1607         err = genlmsg_unicast(msg, info->snd_pid);
1608         goto out;
1609
1610  out_free:
1611         nlmsg_free(msg);
1612  out:
1613         cfg80211_put_dev(drv);
1614         dev_put(dev);
1615  out_rtnl:
1616         rtnl_unlock();
1617
1618         return err;
1619 }
1620
1621 /*
1622  * Get vlan interface making sure it is on the right wiphy.
1623  */
1624 static int get_vlan(struct nlattr *vlanattr,
1625                     struct cfg80211_registered_device *rdev,
1626                     struct net_device **vlan)
1627 {
1628         *vlan = NULL;
1629
1630         if (vlanattr) {
1631                 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1632                 if (!*vlan)
1633                         return -ENODEV;
1634                 if (!(*vlan)->ieee80211_ptr)
1635                         return -EINVAL;
1636                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1637                         return -EINVAL;
1638         }
1639         return 0;
1640 }
1641
1642 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1643 {
1644         struct cfg80211_registered_device *drv;
1645         int err;
1646         struct net_device *dev;
1647         struct station_parameters params;
1648         u8 *mac_addr = NULL;
1649
1650         memset(&params, 0, sizeof(params));
1651
1652         params.listen_interval = -1;
1653
1654         if (info->attrs[NL80211_ATTR_STA_AID])
1655                 return -EINVAL;
1656
1657         if (!info->attrs[NL80211_ATTR_MAC])
1658                 return -EINVAL;
1659
1660         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1661
1662         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1663                 params.supported_rates =
1664                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1665                 params.supported_rates_len =
1666                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1667         }
1668
1669         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1670                 params.listen_interval =
1671                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1672
1673         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1674                 params.ht_capa =
1675                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1676
1677         if (parse_station_flags(info, &params))
1678                 return -EINVAL;
1679
1680         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1681                 params.plink_action =
1682                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1683
1684         rtnl_lock();
1685
1686         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1687         if (err)
1688                 goto out_rtnl;
1689
1690         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1691         if (err)
1692                 goto out;
1693
1694         if (!drv->ops->change_station) {
1695                 err = -EOPNOTSUPP;
1696                 goto out;
1697         }
1698
1699         err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1700
1701  out:
1702         if (params.vlan)
1703                 dev_put(params.vlan);
1704         cfg80211_put_dev(drv);
1705         dev_put(dev);
1706  out_rtnl:
1707         rtnl_unlock();
1708
1709         return err;
1710 }
1711
1712 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1713 {
1714         struct cfg80211_registered_device *drv;
1715         int err;
1716         struct net_device *dev;
1717         struct station_parameters params;
1718         u8 *mac_addr = NULL;
1719
1720         memset(&params, 0, sizeof(params));
1721
1722         if (!info->attrs[NL80211_ATTR_MAC])
1723                 return -EINVAL;
1724
1725         if (!info->attrs[NL80211_ATTR_STA_AID])
1726                 return -EINVAL;
1727
1728         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1729                 return -EINVAL;
1730
1731         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1732                 return -EINVAL;
1733
1734         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1735         params.supported_rates =
1736                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1737         params.supported_rates_len =
1738                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1739         params.listen_interval =
1740                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1741         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1742         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1743                 params.ht_capa =
1744                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1745
1746         if (parse_station_flags(info, &params))
1747                 return -EINVAL;
1748
1749         rtnl_lock();
1750
1751         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1752         if (err)
1753                 goto out_rtnl;
1754
1755         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1756             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
1757                 err = -EINVAL;
1758                 goto out;
1759         }
1760
1761         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1762         if (err)
1763                 goto out;
1764
1765         if (!drv->ops->add_station) {
1766                 err = -EOPNOTSUPP;
1767                 goto out;
1768         }
1769
1770         if (!netif_running(dev)) {
1771                 err = -ENETDOWN;
1772                 goto out;
1773         }
1774
1775         err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1776
1777  out:
1778         if (params.vlan)
1779                 dev_put(params.vlan);
1780         cfg80211_put_dev(drv);
1781         dev_put(dev);
1782  out_rtnl:
1783         rtnl_unlock();
1784
1785         return err;
1786 }
1787
1788 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1789 {
1790         struct cfg80211_registered_device *drv;
1791         int err;
1792         struct net_device *dev;
1793         u8 *mac_addr = NULL;
1794
1795         if (info->attrs[NL80211_ATTR_MAC])
1796                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1797
1798         rtnl_lock();
1799
1800         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1801         if (err)
1802                 goto out_rtnl;
1803
1804         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1805             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
1806                 err = -EINVAL;
1807                 goto out;
1808         }
1809
1810         if (!drv->ops->del_station) {
1811                 err = -EOPNOTSUPP;
1812                 goto out;
1813         }
1814
1815         err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1816
1817  out:
1818         cfg80211_put_dev(drv);
1819         dev_put(dev);
1820  out_rtnl:
1821         rtnl_unlock();
1822
1823         return err;
1824 }
1825
1826 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1827                                 int flags, struct net_device *dev,
1828                                 u8 *dst, u8 *next_hop,
1829                                 struct mpath_info *pinfo)
1830 {
1831         void *hdr;
1832         struct nlattr *pinfoattr;
1833
1834         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1835         if (!hdr)
1836                 return -1;
1837
1838         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1839         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1840         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1841
1842         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1843         if (!pinfoattr)
1844                 goto nla_put_failure;
1845         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1846                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1847                             pinfo->frame_qlen);
1848         if (pinfo->filled & MPATH_INFO_DSN)
1849                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1850                             pinfo->dsn);
1851         if (pinfo->filled & MPATH_INFO_METRIC)
1852                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1853                             pinfo->metric);
1854         if (pinfo->filled & MPATH_INFO_EXPTIME)
1855                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1856                             pinfo->exptime);
1857         if (pinfo->filled & MPATH_INFO_FLAGS)
1858                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1859                             pinfo->flags);
1860         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1861                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1862                             pinfo->discovery_timeout);
1863         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1864                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1865                             pinfo->discovery_retries);
1866
1867         nla_nest_end(msg, pinfoattr);
1868
1869         return genlmsg_end(msg, hdr);
1870
1871  nla_put_failure:
1872         genlmsg_cancel(msg, hdr);
1873         return -EMSGSIZE;
1874 }
1875
1876 static int nl80211_dump_mpath(struct sk_buff *skb,
1877                               struct netlink_callback *cb)
1878 {
1879         struct mpath_info pinfo;
1880         struct cfg80211_registered_device *dev;
1881         struct net_device *netdev;
1882         u8 dst[ETH_ALEN];
1883         u8 next_hop[ETH_ALEN];
1884         int ifidx = cb->args[0];
1885         int path_idx = cb->args[1];
1886         int err;
1887
1888         if (!ifidx) {
1889                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1890                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1891                                   nl80211_policy);
1892                 if (err)
1893                         return err;
1894
1895                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1896                         return -EINVAL;
1897
1898                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1899                 if (!ifidx)
1900                         return -EINVAL;
1901         }
1902
1903         rtnl_lock();
1904
1905         netdev = __dev_get_by_index(&init_net, ifidx);
1906         if (!netdev) {
1907                 err = -ENODEV;
1908                 goto out_rtnl;
1909         }
1910
1911         dev = cfg80211_get_dev_from_ifindex(ifidx);
1912         if (IS_ERR(dev)) {
1913                 err = PTR_ERR(dev);
1914                 goto out_rtnl;
1915         }
1916
1917         if (!dev->ops->dump_mpath) {
1918                 err = -EOPNOTSUPP;
1919                 goto out_err;
1920         }
1921
1922         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1923                 err = -EOPNOTSUPP;
1924                 goto out;
1925         }
1926
1927         while (1) {
1928                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1929                                            dst, next_hop, &pinfo);
1930                 if (err == -ENOENT)
1931                         break;
1932                 if (err)
1933                         goto out_err;
1934
1935                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1936                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1937                                        netdev, dst, next_hop,
1938                                        &pinfo) < 0)
1939                         goto out;
1940
1941                 path_idx++;
1942         }
1943
1944
1945  out:
1946         cb->args[1] = path_idx;
1947         err = skb->len;
1948  out_err:
1949         cfg80211_put_dev(dev);
1950  out_rtnl:
1951         rtnl_unlock();
1952
1953         return err;
1954 }
1955
1956 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1957 {
1958         struct cfg80211_registered_device *drv;
1959         int err;
1960         struct net_device *dev;
1961         struct mpath_info pinfo;
1962         struct sk_buff *msg;
1963         u8 *dst = NULL;
1964         u8 next_hop[ETH_ALEN];
1965
1966         memset(&pinfo, 0, sizeof(pinfo));
1967
1968         if (!info->attrs[NL80211_ATTR_MAC])
1969                 return -EINVAL;
1970
1971         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1972
1973         rtnl_lock();
1974
1975         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1976         if (err)
1977                 goto out_rtnl;
1978
1979         if (!drv->ops->get_mpath) {
1980                 err = -EOPNOTSUPP;
1981                 goto out;
1982         }
1983
1984         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1985                 err = -EOPNOTSUPP;
1986                 goto out;
1987         }
1988
1989         err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
1990         if (err)
1991                 goto out;
1992
1993         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1994         if (!msg)
1995                 goto out;
1996
1997         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
1998                                  dev, dst, next_hop, &pinfo) < 0)
1999                 goto out_free;
2000
2001         err = genlmsg_unicast(msg, info->snd_pid);
2002         goto out;
2003
2004  out_free:
2005         nlmsg_free(msg);
2006  out:
2007         cfg80211_put_dev(drv);
2008         dev_put(dev);
2009  out_rtnl:
2010         rtnl_unlock();
2011
2012         return err;
2013 }
2014
2015 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2016 {
2017         struct cfg80211_registered_device *drv;
2018         int err;
2019         struct net_device *dev;
2020         u8 *dst = NULL;
2021         u8 *next_hop = NULL;
2022
2023         if (!info->attrs[NL80211_ATTR_MAC])
2024                 return -EINVAL;
2025
2026         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2027                 return -EINVAL;
2028
2029         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2030         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2031
2032         rtnl_lock();
2033
2034         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2035         if (err)
2036                 goto out_rtnl;
2037
2038         if (!drv->ops->change_mpath) {
2039                 err = -EOPNOTSUPP;
2040                 goto out;
2041         }
2042
2043         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2044                 err = -EOPNOTSUPP;
2045                 goto out;
2046         }
2047
2048         if (!netif_running(dev)) {
2049                 err = -ENETDOWN;
2050                 goto out;
2051         }
2052
2053         err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
2054
2055  out:
2056         cfg80211_put_dev(drv);
2057         dev_put(dev);
2058  out_rtnl:
2059         rtnl_unlock();
2060
2061         return err;
2062 }
2063 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2064 {
2065         struct cfg80211_registered_device *drv;
2066         int err;
2067         struct net_device *dev;
2068         u8 *dst = NULL;
2069         u8 *next_hop = NULL;
2070
2071         if (!info->attrs[NL80211_ATTR_MAC])
2072                 return -EINVAL;
2073
2074         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2075                 return -EINVAL;
2076
2077         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2078         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2079
2080         rtnl_lock();
2081
2082         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2083         if (err)
2084                 goto out_rtnl;
2085
2086         if (!drv->ops->add_mpath) {
2087                 err = -EOPNOTSUPP;
2088                 goto out;
2089         }
2090
2091         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2092                 err = -EOPNOTSUPP;
2093                 goto out;
2094         }
2095
2096         if (!netif_running(dev)) {
2097                 err = -ENETDOWN;
2098                 goto out;
2099         }
2100
2101         err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
2102
2103  out:
2104         cfg80211_put_dev(drv);
2105         dev_put(dev);
2106  out_rtnl:
2107         rtnl_unlock();
2108
2109         return err;
2110 }
2111
2112 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2113 {
2114         struct cfg80211_registered_device *drv;
2115         int err;
2116         struct net_device *dev;
2117         u8 *dst = NULL;
2118
2119         if (info->attrs[NL80211_ATTR_MAC])
2120                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2121
2122         rtnl_lock();
2123
2124         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2125         if (err)
2126                 goto out_rtnl;
2127
2128         if (!drv->ops->del_mpath) {
2129                 err = -EOPNOTSUPP;
2130                 goto out;
2131         }
2132
2133         err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
2134
2135  out:
2136         cfg80211_put_dev(drv);
2137         dev_put(dev);
2138  out_rtnl:
2139         rtnl_unlock();
2140
2141         return err;
2142 }
2143
2144 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2145 {
2146         struct cfg80211_registered_device *drv;
2147         int err;
2148         struct net_device *dev;
2149         struct bss_parameters params;
2150
2151         memset(&params, 0, sizeof(params));
2152         /* default to not changing parameters */
2153         params.use_cts_prot = -1;
2154         params.use_short_preamble = -1;
2155         params.use_short_slot_time = -1;
2156
2157         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2158                 params.use_cts_prot =
2159                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2160         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2161                 params.use_short_preamble =
2162                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2163         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2164                 params.use_short_slot_time =
2165                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2166         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2167                 params.basic_rates =
2168                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2169                 params.basic_rates_len =
2170                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2171         }
2172
2173         rtnl_lock();
2174
2175         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2176         if (err)
2177                 goto out_rtnl;
2178
2179         if (!drv->ops->change_bss) {
2180                 err = -EOPNOTSUPP;
2181                 goto out;
2182         }
2183
2184         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2185                 err = -EOPNOTSUPP;
2186                 goto out;
2187         }
2188
2189         err = drv->ops->change_bss(&drv->wiphy, dev, &params);
2190
2191  out:
2192         cfg80211_put_dev(drv);
2193         dev_put(dev);
2194  out_rtnl:
2195         rtnl_unlock();
2196
2197         return err;
2198 }
2199
2200 static const struct nla_policy
2201         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2202         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2203         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2204         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2205         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2206         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2207         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2208 };
2209
2210 static int parse_reg_rule(struct nlattr *tb[],
2211         struct ieee80211_reg_rule *reg_rule)
2212 {
2213         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2214         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2215
2216         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2217                 return -EINVAL;
2218         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2219                 return -EINVAL;
2220         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2221                 return -EINVAL;
2222         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2223                 return -EINVAL;
2224         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2225                 return -EINVAL;
2226
2227         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2228
2229         freq_range->start_freq_khz =
2230                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2231         freq_range->end_freq_khz =
2232                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2233         freq_range->max_bandwidth_khz =
2234                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2235
2236         power_rule->max_eirp =
2237                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2238
2239         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2240                 power_rule->max_antenna_gain =
2241                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2242
2243         return 0;
2244 }
2245
2246 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2247 {
2248         int r;
2249         char *data = NULL;
2250
2251         /*
2252          * You should only get this when cfg80211 hasn't yet initialized
2253          * completely when built-in to the kernel right between the time
2254          * window between nl80211_init() and regulatory_init(), if that is
2255          * even possible.
2256          */
2257         mutex_lock(&cfg80211_mutex);
2258         if (unlikely(!cfg80211_regdomain)) {
2259                 mutex_unlock(&cfg80211_mutex);
2260                 return -EINPROGRESS;
2261         }
2262         mutex_unlock(&cfg80211_mutex);
2263
2264         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2265                 return -EINVAL;
2266
2267         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2268
2269 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2270         /* We ignore world regdom requests with the old regdom setup */
2271         if (is_world_regdom(data))
2272                 return -EINVAL;
2273 #endif
2274
2275         r = regulatory_hint_user(data);
2276
2277         return r;
2278 }
2279
2280 static int nl80211_get_mesh_params(struct sk_buff *skb,
2281         struct genl_info *info)
2282 {
2283         struct cfg80211_registered_device *drv;
2284         struct mesh_config cur_params;
2285         int err;
2286         struct net_device *dev;
2287         void *hdr;
2288         struct nlattr *pinfoattr;
2289         struct sk_buff *msg;
2290
2291         rtnl_lock();
2292
2293         /* Look up our device */
2294         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2295         if (err)
2296                 goto out_rtnl;
2297
2298         if (!drv->ops->get_mesh_params) {
2299                 err = -EOPNOTSUPP;
2300                 goto out;
2301         }
2302
2303         /* Get the mesh params */
2304         err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
2305         if (err)
2306                 goto out;
2307
2308         /* Draw up a netlink message to send back */
2309         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2310         if (!msg) {
2311                 err = -ENOBUFS;
2312                 goto out;
2313         }
2314         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2315                              NL80211_CMD_GET_MESH_PARAMS);
2316         if (!hdr)
2317                 goto nla_put_failure;
2318         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2319         if (!pinfoattr)
2320                 goto nla_put_failure;
2321         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2322         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2323                         cur_params.dot11MeshRetryTimeout);
2324         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2325                         cur_params.dot11MeshConfirmTimeout);
2326         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2327                         cur_params.dot11MeshHoldingTimeout);
2328         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2329                         cur_params.dot11MeshMaxPeerLinks);
2330         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2331                         cur_params.dot11MeshMaxRetries);
2332         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2333                         cur_params.dot11MeshTTL);
2334         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2335                         cur_params.auto_open_plinks);
2336         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2337                         cur_params.dot11MeshHWMPmaxPREQretries);
2338         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2339                         cur_params.path_refresh_time);
2340         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2341                         cur_params.min_discovery_timeout);
2342         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2343                         cur_params.dot11MeshHWMPactivePathTimeout);
2344         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2345                         cur_params.dot11MeshHWMPpreqMinInterval);
2346         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2347                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2348         nla_nest_end(msg, pinfoattr);
2349         genlmsg_end(msg, hdr);
2350         err = genlmsg_unicast(msg, info->snd_pid);
2351         goto out;
2352
2353  nla_put_failure:
2354         genlmsg_cancel(msg, hdr);
2355         err = -EMSGSIZE;
2356  out:
2357         /* Cleanup */
2358         cfg80211_put_dev(drv);
2359         dev_put(dev);
2360  out_rtnl:
2361         rtnl_unlock();
2362
2363         return err;
2364 }
2365
2366 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2367 do {\
2368         if (table[attr_num]) {\
2369                 cfg.param = nla_fn(table[attr_num]); \
2370                 mask |= (1 << (attr_num - 1)); \
2371         } \
2372 } while (0);\
2373
2374 static struct nla_policy
2375 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2376         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2377         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2378         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2379         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2380         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2381         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2382         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2383
2384         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2385         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2386         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2387         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2388         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2389         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2390 };
2391
2392 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2393 {
2394         int err;
2395         u32 mask;
2396         struct cfg80211_registered_device *drv;
2397         struct net_device *dev;
2398         struct mesh_config cfg;
2399         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2400         struct nlattr *parent_attr;
2401
2402         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2403         if (!parent_attr)
2404                 return -EINVAL;
2405         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2406                         parent_attr, nl80211_meshconf_params_policy))
2407                 return -EINVAL;
2408
2409         rtnl_lock();
2410
2411         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2412         if (err)
2413                 goto out_rtnl;
2414
2415         if (!drv->ops->set_mesh_params) {
2416                 err = -EOPNOTSUPP;
2417                 goto out;
2418         }
2419
2420         /* This makes sure that there aren't more than 32 mesh config
2421          * parameters (otherwise our bitfield scheme would not work.) */
2422         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2423
2424         /* Fill in the params struct */
2425         mask = 0;
2426         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2427                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2428         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2429                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2430         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2431                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2432         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2433                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2434         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2435                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2436         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2437                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2438         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2439                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2440         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2441                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2442                         nla_get_u8);
2443         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2444                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2445         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2446                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2447                         nla_get_u16);
2448         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2449                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2450                         nla_get_u32);
2451         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2452                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2453                         nla_get_u16);
2454         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2455                         dot11MeshHWMPnetDiameterTraversalTime,
2456                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2457                         nla_get_u16);
2458
2459         /* Apply changes */
2460         err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2461
2462  out:
2463         /* cleanup */
2464         cfg80211_put_dev(drv);
2465         dev_put(dev);
2466  out_rtnl:
2467         rtnl_unlock();
2468
2469         return err;
2470 }
2471
2472 #undef FILL_IN_MESH_PARAM_IF_SET
2473
2474 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2475 {
2476         struct sk_buff *msg;
2477         void *hdr = NULL;
2478         struct nlattr *nl_reg_rules;
2479         unsigned int i;
2480         int err = -EINVAL;
2481
2482         mutex_lock(&cfg80211_mutex);
2483
2484         if (!cfg80211_regdomain)
2485                 goto out;
2486
2487         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2488         if (!msg) {
2489                 err = -ENOBUFS;
2490                 goto out;
2491         }
2492
2493         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2494                              NL80211_CMD_GET_REG);
2495         if (!hdr)
2496                 goto nla_put_failure;
2497
2498         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2499                 cfg80211_regdomain->alpha2);
2500
2501         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2502         if (!nl_reg_rules)
2503                 goto nla_put_failure;
2504
2505         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2506                 struct nlattr *nl_reg_rule;
2507                 const struct ieee80211_reg_rule *reg_rule;
2508                 const struct ieee80211_freq_range *freq_range;
2509                 const struct ieee80211_power_rule *power_rule;
2510
2511                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2512                 freq_range = &reg_rule->freq_range;
2513                 power_rule = &reg_rule->power_rule;
2514
2515                 nl_reg_rule = nla_nest_start(msg, i);
2516                 if (!nl_reg_rule)
2517                         goto nla_put_failure;
2518
2519                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2520                         reg_rule->flags);
2521                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2522                         freq_range->start_freq_khz);
2523                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2524                         freq_range->end_freq_khz);
2525                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2526                         freq_range->max_bandwidth_khz);
2527                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2528                         power_rule->max_antenna_gain);
2529                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2530                         power_rule->max_eirp);
2531
2532                 nla_nest_end(msg, nl_reg_rule);
2533         }
2534
2535         nla_nest_end(msg, nl_reg_rules);
2536
2537         genlmsg_end(msg, hdr);
2538         err = genlmsg_unicast(msg, info->snd_pid);
2539         goto out;
2540
2541 nla_put_failure:
2542         genlmsg_cancel(msg, hdr);
2543         err = -EMSGSIZE;
2544 out:
2545         mutex_unlock(&cfg80211_mutex);
2546         return err;
2547 }
2548
2549 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2550 {
2551         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2552         struct nlattr *nl_reg_rule;
2553         char *alpha2 = NULL;
2554         int rem_reg_rules = 0, r = 0;
2555         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2556         struct ieee80211_regdomain *rd = NULL;
2557
2558         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2559                 return -EINVAL;
2560
2561         if (!info->attrs[NL80211_ATTR_REG_RULES])
2562                 return -EINVAL;
2563
2564         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2565
2566         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2567                         rem_reg_rules) {
2568                 num_rules++;
2569                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2570                         return -EINVAL;
2571         }
2572
2573         if (!reg_is_valid_request(alpha2))
2574                 return -EINVAL;
2575
2576         size_of_regd = sizeof(struct ieee80211_regdomain) +
2577                 (num_rules * sizeof(struct ieee80211_reg_rule));
2578
2579         rd = kzalloc(size_of_regd, GFP_KERNEL);
2580         if (!rd)
2581                 return -ENOMEM;
2582
2583         rd->n_reg_rules = num_rules;
2584         rd->alpha2[0] = alpha2[0];
2585         rd->alpha2[1] = alpha2[1];
2586
2587         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2588                         rem_reg_rules) {
2589                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2590                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2591                         reg_rule_policy);
2592                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2593                 if (r)
2594                         goto bad_reg;
2595
2596                 rule_idx++;
2597
2598                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES)
2599                         goto bad_reg;
2600         }
2601
2602         BUG_ON(rule_idx != num_rules);
2603
2604         mutex_lock(&cfg80211_mutex);
2605         r = set_regdom(rd);
2606         mutex_unlock(&cfg80211_mutex);
2607         return r;
2608
2609  bad_reg:
2610         kfree(rd);
2611         return -EINVAL;
2612 }
2613
2614 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2615 {
2616         struct cfg80211_registered_device *drv;
2617         struct net_device *dev;
2618         struct cfg80211_scan_request *request;
2619         struct cfg80211_ssid *ssid;
2620         struct ieee80211_channel *channel;
2621         struct nlattr *attr;
2622         struct wiphy *wiphy;
2623         int err, tmp, n_ssids = 0, n_channels = 0, i;
2624         enum ieee80211_band band;
2625         size_t ie_len;
2626
2627         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2628                 return -EINVAL;
2629
2630         rtnl_lock();
2631
2632         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2633         if (err)
2634                 goto out_rtnl;
2635
2636         wiphy = &drv->wiphy;
2637
2638         if (!drv->ops->scan) {
2639                 err = -EOPNOTSUPP;
2640                 goto out;
2641         }
2642
2643         if (!netif_running(dev)) {
2644                 err = -ENETDOWN;
2645                 goto out;
2646         }
2647
2648         if (drv->scan_req) {
2649                 err = -EBUSY;
2650                 goto out;
2651         }
2652
2653         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2654                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp)
2655                         n_channels++;
2656                 if (!n_channels) {
2657                         err = -EINVAL;
2658                         goto out;
2659                 }
2660         } else {
2661                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2662                         if (wiphy->bands[band])
2663                                 n_channels += wiphy->bands[band]->n_channels;
2664         }
2665
2666         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2667                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2668                         n_ssids++;
2669
2670         if (n_ssids > wiphy->max_scan_ssids) {
2671                 err = -EINVAL;
2672                 goto out;
2673         }
2674
2675         if (info->attrs[NL80211_ATTR_IE])
2676                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2677         else
2678                 ie_len = 0;
2679
2680         if (ie_len > wiphy->max_scan_ie_len) {
2681                 err = -EINVAL;
2682                 goto out;
2683         }
2684
2685         request = kzalloc(sizeof(*request)
2686                         + sizeof(*ssid) * n_ssids
2687                         + sizeof(channel) * n_channels
2688                         + ie_len, GFP_KERNEL);
2689         if (!request) {
2690                 err = -ENOMEM;
2691                 goto out;
2692         }
2693
2694         request->channels = (void *)((char *)request + sizeof(*request));
2695         request->n_channels = n_channels;
2696         if (n_ssids)
2697                 request->ssids = (void *)(request->channels + n_channels);
2698         request->n_ssids = n_ssids;
2699         if (ie_len) {
2700                 if (request->ssids)
2701                         request->ie = (void *)(request->ssids + n_ssids);
2702                 else
2703                         request->ie = (void *)(request->channels + n_channels);
2704         }
2705
2706         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2707                 /* user specified, bail out if channel not found */
2708                 request->n_channels = n_channels;
2709                 i = 0;
2710                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2711                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2712                         if (!request->channels[i]) {
2713                                 err = -EINVAL;
2714                                 goto out_free;
2715                         }
2716                         i++;
2717                 }
2718         } else {
2719                 /* all channels */
2720                 i = 0;
2721                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2722                         int j;
2723                         if (!wiphy->bands[band])
2724                                 continue;
2725                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2726                                 request->channels[i] = &wiphy->bands[band]->channels[j];
2727                                 i++;
2728                         }
2729                 }
2730         }
2731
2732         i = 0;
2733         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2734                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2735                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2736                                 err = -EINVAL;
2737                                 goto out_free;
2738                         }
2739                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2740                         request->ssids[i].ssid_len = nla_len(attr);
2741                         i++;
2742                 }
2743         }
2744
2745         if (info->attrs[NL80211_ATTR_IE]) {
2746                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2747                 memcpy((void *)request->ie,
2748                        nla_data(info->attrs[NL80211_ATTR_IE]),
2749                        request->ie_len);
2750         }
2751
2752         request->ifidx = dev->ifindex;
2753         request->wiphy = &drv->wiphy;
2754
2755         drv->scan_req = request;
2756         err = drv->ops->scan(&drv->wiphy, dev, request);
2757
2758  out_free:
2759         if (err) {
2760                 drv->scan_req = NULL;
2761                 kfree(request);
2762         }
2763  out:
2764         cfg80211_put_dev(drv);
2765         dev_put(dev);
2766  out_rtnl:
2767         rtnl_unlock();
2768
2769         return err;
2770 }
2771
2772 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
2773                             struct cfg80211_registered_device *rdev,
2774                             struct net_device *dev,
2775                             struct cfg80211_bss *res)
2776 {
2777         void *hdr;
2778         struct nlattr *bss;
2779
2780         hdr = nl80211hdr_put(msg, pid, seq, flags,
2781                              NL80211_CMD_NEW_SCAN_RESULTS);
2782         if (!hdr)
2783                 return -1;
2784
2785         NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
2786                     rdev->bss_generation);
2787         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2788
2789         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
2790         if (!bss)
2791                 goto nla_put_failure;
2792         if (!is_zero_ether_addr(res->bssid))
2793                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
2794         if (res->information_elements && res->len_information_elements)
2795                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
2796                         res->len_information_elements,
2797                         res->information_elements);
2798         if (res->tsf)
2799                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
2800         if (res->beacon_interval)
2801                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
2802         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
2803         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
2804
2805         switch (rdev->wiphy.signal_type) {
2806         case CFG80211_SIGNAL_TYPE_MBM:
2807                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
2808                 break;
2809         case CFG80211_SIGNAL_TYPE_UNSPEC:
2810                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
2811                 break;
2812         default:
2813                 break;
2814         }
2815
2816         nla_nest_end(msg, bss);
2817
2818         return genlmsg_end(msg, hdr);
2819
2820  nla_put_failure:
2821         genlmsg_cancel(msg, hdr);
2822         return -EMSGSIZE;
2823 }
2824
2825 static int nl80211_dump_scan(struct sk_buff *skb,
2826                              struct netlink_callback *cb)
2827 {
2828         struct cfg80211_registered_device *dev;
2829         struct net_device *netdev;
2830         struct cfg80211_internal_bss *scan;
2831         int ifidx = cb->args[0];
2832         int start = cb->args[1], idx = 0;
2833         int err;
2834
2835         if (!ifidx) {
2836                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2837                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2838                                   nl80211_policy);
2839                 if (err)
2840                         return err;
2841
2842                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2843                         return -EINVAL;
2844
2845                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2846                 if (!ifidx)
2847                         return -EINVAL;
2848                 cb->args[0] = ifidx;
2849         }
2850
2851         netdev = dev_get_by_index(&init_net, ifidx);
2852         if (!netdev)
2853                 return -ENODEV;
2854
2855         dev = cfg80211_get_dev_from_ifindex(ifidx);
2856         if (IS_ERR(dev)) {
2857                 err = PTR_ERR(dev);
2858                 goto out_put_netdev;
2859         }
2860
2861         spin_lock_bh(&dev->bss_lock);
2862         cfg80211_bss_expire(dev);
2863
2864         list_for_each_entry(scan, &dev->bss_list, list) {
2865                 if (++idx <= start)
2866                         continue;
2867                 if (nl80211_send_bss(skb,
2868                                 NETLINK_CB(cb->skb).pid,
2869                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2870                                 dev, netdev, &scan->pub) < 0) {
2871                         idx--;
2872                         goto out;
2873                 }
2874         }
2875
2876  out:
2877         spin_unlock_bh(&dev->bss_lock);
2878
2879         cb->args[1] = idx;
2880         err = skb->len;
2881         cfg80211_put_dev(dev);
2882  out_put_netdev:
2883         dev_put(netdev);
2884
2885         return err;
2886 }
2887
2888 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
2889 {
2890         return auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM ||
2891                 auth_type == NL80211_AUTHTYPE_SHARED_KEY ||
2892                 auth_type == NL80211_AUTHTYPE_FT ||
2893                 auth_type == NL80211_AUTHTYPE_NETWORK_EAP;
2894 }
2895
2896 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
2897 {
2898         struct cfg80211_registered_device *drv;
2899         struct net_device *dev;
2900         struct cfg80211_auth_request req;
2901         struct wiphy *wiphy;
2902         int err;
2903
2904         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2905                 return -EINVAL;
2906
2907         if (!info->attrs[NL80211_ATTR_MAC])
2908                 return -EINVAL;
2909
2910         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
2911                 return -EINVAL;
2912
2913         rtnl_lock();
2914
2915         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2916         if (err)
2917                 goto unlock_rtnl;
2918
2919         if (!drv->ops->auth) {
2920                 err = -EOPNOTSUPP;
2921                 goto out;
2922         }
2923
2924         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
2925                 err = -EOPNOTSUPP;
2926                 goto out;
2927         }
2928
2929         if (!netif_running(dev)) {
2930                 err = -ENETDOWN;
2931                 goto out;
2932         }
2933
2934         wiphy = &drv->wiphy;
2935         memset(&req, 0, sizeof(req));
2936
2937         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2938
2939         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2940                 req.chan = ieee80211_get_channel(
2941                         wiphy,
2942                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
2943                 if (!req.chan) {
2944                         err = -EINVAL;
2945                         goto out;
2946                 }
2947         }
2948
2949         if (info->attrs[NL80211_ATTR_SSID]) {
2950                 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2951                 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
2952         }
2953
2954         if (info->attrs[NL80211_ATTR_IE]) {
2955                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
2956                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2957         }
2958
2959         req.auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
2960         if (!nl80211_valid_auth_type(req.auth_type)) {
2961                 err = -EINVAL;
2962                 goto out;
2963         }
2964
2965         err = drv->ops->auth(&drv->wiphy, dev, &req);
2966
2967 out:
2968         cfg80211_put_dev(drv);
2969         dev_put(dev);
2970 unlock_rtnl:
2971         rtnl_unlock();
2972         return err;
2973 }
2974
2975 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
2976 {
2977         struct cfg80211_registered_device *drv;
2978         struct net_device *dev;
2979         struct cfg80211_assoc_request req;
2980         struct wiphy *wiphy;
2981         int err;
2982
2983         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2984                 return -EINVAL;
2985
2986         if (!info->attrs[NL80211_ATTR_MAC] ||
2987             !info->attrs[NL80211_ATTR_SSID])
2988                 return -EINVAL;
2989
2990         rtnl_lock();
2991
2992         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2993         if (err)
2994                 goto unlock_rtnl;
2995
2996         if (!drv->ops->assoc) {
2997                 err = -EOPNOTSUPP;
2998                 goto out;
2999         }
3000
3001         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3002                 err = -EOPNOTSUPP;
3003                 goto out;
3004         }
3005
3006         if (!netif_running(dev)) {
3007                 err = -ENETDOWN;
3008                 goto out;
3009         }
3010
3011         wiphy = &drv->wiphy;
3012         memset(&req, 0, sizeof(req));
3013
3014         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3015
3016         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3017                 req.chan = ieee80211_get_channel(
3018                         wiphy,
3019                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3020                 if (!req.chan) {
3021                         err = -EINVAL;
3022                         goto out;
3023                 }
3024         }
3025
3026         req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3027         req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3028
3029         if (info->attrs[NL80211_ATTR_IE]) {
3030                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3031                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3032         }
3033
3034         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3035                 enum nl80211_mfp use_mfp =
3036                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3037                 if (use_mfp == NL80211_MFP_REQUIRED)
3038                         req.use_mfp = true;
3039                 else if (use_mfp != NL80211_MFP_NO) {
3040                         err = -EINVAL;
3041                         goto out;
3042                 }
3043         }
3044
3045         req.control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3046
3047         err = drv->ops->assoc(&drv->wiphy, dev, &req);
3048
3049 out:
3050         cfg80211_put_dev(drv);
3051         dev_put(dev);
3052 unlock_rtnl:
3053         rtnl_unlock();
3054         return err;
3055 }
3056
3057 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3058 {
3059         struct cfg80211_registered_device *drv;
3060         struct net_device *dev;
3061         struct cfg80211_deauth_request req;
3062         struct wiphy *wiphy;
3063         int err;
3064
3065         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3066                 return -EINVAL;
3067
3068         if (!info->attrs[NL80211_ATTR_MAC])
3069                 return -EINVAL;
3070
3071         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3072                 return -EINVAL;
3073
3074         rtnl_lock();
3075
3076         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3077         if (err)
3078                 goto unlock_rtnl;
3079
3080         if (!drv->ops->deauth) {
3081                 err = -EOPNOTSUPP;
3082                 goto out;
3083         }
3084
3085         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3086                 err = -EOPNOTSUPP;
3087                 goto out;
3088         }
3089
3090         if (!netif_running(dev)) {
3091                 err = -ENETDOWN;
3092                 goto out;
3093         }
3094
3095         wiphy = &drv->wiphy;
3096         memset(&req, 0, sizeof(req));
3097
3098         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3099
3100         req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3101         if (req.reason_code == 0) {
3102                 /* Reason Code 0 is reserved */
3103                 err = -EINVAL;
3104                 goto out;
3105         }
3106
3107         if (info->attrs[NL80211_ATTR_IE]) {
3108                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3109                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3110         }
3111
3112         err = drv->ops->deauth(&drv->wiphy, dev, &req);
3113
3114 out:
3115         cfg80211_put_dev(drv);
3116         dev_put(dev);
3117 unlock_rtnl:
3118         rtnl_unlock();
3119         return err;
3120 }
3121
3122 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3123 {
3124         struct cfg80211_registered_device *drv;
3125         struct net_device *dev;
3126         struct cfg80211_disassoc_request req;
3127         struct wiphy *wiphy;
3128         int err;
3129
3130         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3131                 return -EINVAL;
3132
3133         if (!info->attrs[NL80211_ATTR_MAC])
3134                 return -EINVAL;
3135
3136         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3137                 return -EINVAL;
3138
3139         rtnl_lock();
3140
3141         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3142         if (err)
3143                 goto unlock_rtnl;
3144
3145         if (!drv->ops->disassoc) {
3146                 err = -EOPNOTSUPP;
3147                 goto out;
3148         }
3149
3150         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3151                 err = -EOPNOTSUPP;
3152                 goto out;
3153         }
3154
3155         if (!netif_running(dev)) {
3156                 err = -ENETDOWN;
3157                 goto out;
3158         }
3159
3160         wiphy = &drv->wiphy;
3161         memset(&req, 0, sizeof(req));
3162
3163         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3164
3165         req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3166         if (req.reason_code == 0) {
3167                 /* Reason Code 0 is reserved */
3168                 err = -EINVAL;
3169                 goto out;
3170         }
3171
3172         if (info->attrs[NL80211_ATTR_IE]) {
3173                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3174                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3175         }
3176
3177         err = drv->ops->disassoc(&drv->wiphy, dev, &req);
3178
3179 out:
3180         cfg80211_put_dev(drv);
3181         dev_put(dev);
3182 unlock_rtnl:
3183         rtnl_unlock();
3184         return err;
3185 }
3186
3187 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3188 {
3189         struct cfg80211_registered_device *drv;
3190         struct net_device *dev;
3191         struct cfg80211_ibss_params ibss;
3192         struct wiphy *wiphy;
3193         int err;
3194
3195         memset(&ibss, 0, sizeof(ibss));
3196
3197         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3198                 return -EINVAL;
3199
3200         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3201             !info->attrs[NL80211_ATTR_SSID] ||
3202             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3203                 return -EINVAL;
3204
3205         ibss.beacon_interval = 100;
3206
3207         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3208                 ibss.beacon_interval =
3209                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3210                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3211                         return -EINVAL;
3212         }
3213
3214         rtnl_lock();
3215
3216         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3217         if (err)
3218                 goto unlock_rtnl;
3219
3220         if (!drv->ops->join_ibss) {
3221                 err = -EOPNOTSUPP;
3222                 goto out;
3223         }
3224
3225         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3226                 err = -EOPNOTSUPP;
3227                 goto out;
3228         }
3229
3230         if (!netif_running(dev)) {
3231                 err = -ENETDOWN;
3232                 goto out;
3233         }
3234
3235         wiphy = &drv->wiphy;
3236
3237         if (info->attrs[NL80211_ATTR_MAC])
3238                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3239         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3240         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3241
3242         if (info->attrs[NL80211_ATTR_IE]) {
3243                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3244                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3245         }
3246
3247         ibss.channel = ieee80211_get_channel(wiphy,
3248                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3249         if (!ibss.channel ||
3250             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3251             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3252                 err = -EINVAL;
3253                 goto out;
3254         }
3255
3256         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3257
3258         err = cfg80211_join_ibss(drv, dev, &ibss);
3259
3260 out:
3261         cfg80211_put_dev(drv);
3262         dev_put(dev);
3263 unlock_rtnl:
3264         rtnl_unlock();
3265         return err;
3266 }
3267
3268 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3269 {
3270         struct cfg80211_registered_device *drv;
3271         struct net_device *dev;
3272         int err;
3273
3274         rtnl_lock();
3275
3276         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3277         if (err)
3278                 goto unlock_rtnl;
3279
3280         if (!drv->ops->leave_ibss) {
3281                 err = -EOPNOTSUPP;
3282                 goto out;
3283         }
3284
3285         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3286                 err = -EOPNOTSUPP;
3287                 goto out;
3288         }
3289
3290         if (!netif_running(dev)) {
3291                 err = -ENETDOWN;
3292                 goto out;
3293         }
3294
3295         err = cfg80211_leave_ibss(drv, dev, false);
3296
3297 out:
3298         cfg80211_put_dev(drv);
3299         dev_put(dev);
3300 unlock_rtnl:
3301         rtnl_unlock();
3302         return err;
3303 }
3304
3305 static struct genl_ops nl80211_ops[] = {
3306         {
3307                 .cmd = NL80211_CMD_GET_WIPHY,
3308                 .doit = nl80211_get_wiphy,
3309                 .dumpit = nl80211_dump_wiphy,
3310                 .policy = nl80211_policy,
3311                 /* can be retrieved by unprivileged users */
3312         },
3313         {
3314                 .cmd = NL80211_CMD_SET_WIPHY,
3315                 .doit = nl80211_set_wiphy,
3316                 .policy = nl80211_policy,
3317                 .flags = GENL_ADMIN_PERM,
3318         },
3319         {
3320                 .cmd = NL80211_CMD_GET_INTERFACE,
3321                 .doit = nl80211_get_interface,
3322                 .dumpit = nl80211_dump_interface,
3323                 .policy = nl80211_policy,
3324                 /* can be retrieved by unprivileged users */
3325         },
3326         {
3327                 .cmd = NL80211_CMD_SET_INTERFACE,
3328                 .doit = nl80211_set_interface,
3329                 .policy = nl80211_policy,
3330                 .flags = GENL_ADMIN_PERM,
3331         },
3332         {
3333                 .cmd = NL80211_CMD_NEW_INTERFACE,
3334                 .doit = nl80211_new_interface,
3335                 .policy = nl80211_policy,
3336                 .flags = GENL_ADMIN_PERM,
3337         },
3338         {
3339                 .cmd = NL80211_CMD_DEL_INTERFACE,
3340                 .doit = nl80211_del_interface,
3341                 .policy = nl80211_policy,
3342                 .flags = GENL_ADMIN_PERM,
3343         },
3344         {
3345                 .cmd = NL80211_CMD_GET_KEY,
3346                 .doit = nl80211_get_key,
3347                 .policy = nl80211_policy,
3348                 .flags = GENL_ADMIN_PERM,
3349         },
3350         {
3351                 .cmd = NL80211_CMD_SET_KEY,
3352                 .doit = nl80211_set_key,
3353                 .policy = nl80211_policy,
3354                 .flags = GENL_ADMIN_PERM,
3355         },
3356         {
3357                 .cmd = NL80211_CMD_NEW_KEY,
3358                 .doit = nl80211_new_key,
3359                 .policy = nl80211_policy,
3360                 .flags = GENL_ADMIN_PERM,
3361         },
3362         {
3363                 .cmd = NL80211_CMD_DEL_KEY,
3364                 .doit = nl80211_del_key,
3365                 .policy = nl80211_policy,
3366                 .flags = GENL_ADMIN_PERM,
3367         },
3368         {
3369                 .cmd = NL80211_CMD_SET_BEACON,
3370                 .policy = nl80211_policy,
3371                 .flags = GENL_ADMIN_PERM,
3372                 .doit = nl80211_addset_beacon,
3373         },
3374         {
3375                 .cmd = NL80211_CMD_NEW_BEACON,
3376                 .policy = nl80211_policy,
3377                 .flags = GENL_ADMIN_PERM,
3378                 .doit = nl80211_addset_beacon,
3379         },
3380         {
3381                 .cmd = NL80211_CMD_DEL_BEACON,
3382                 .policy = nl80211_policy,
3383                 .flags = GENL_ADMIN_PERM,
3384                 .doit = nl80211_del_beacon,
3385         },
3386         {
3387                 .cmd = NL80211_CMD_GET_STATION,
3388                 .doit = nl80211_get_station,
3389                 .dumpit = nl80211_dump_station,
3390                 .policy = nl80211_policy,
3391         },
3392         {
3393                 .cmd = NL80211_CMD_SET_STATION,
3394                 .doit = nl80211_set_station,
3395                 .policy = nl80211_policy,
3396                 .flags = GENL_ADMIN_PERM,
3397         },
3398         {
3399                 .cmd = NL80211_CMD_NEW_STATION,
3400                 .doit = nl80211_new_station,
3401                 .policy = nl80211_policy,
3402                 .flags = GENL_ADMIN_PERM,
3403         },
3404         {
3405                 .cmd = NL80211_CMD_DEL_STATION,
3406                 .doit = nl80211_del_station,
3407                 .policy = nl80211_policy,
3408                 .flags = GENL_ADMIN_PERM,
3409         },
3410         {
3411                 .cmd = NL80211_CMD_GET_MPATH,
3412                 .doit = nl80211_get_mpath,
3413                 .dumpit = nl80211_dump_mpath,
3414                 .policy = nl80211_policy,
3415                 .flags = GENL_ADMIN_PERM,
3416         },
3417         {
3418                 .cmd = NL80211_CMD_SET_MPATH,
3419                 .doit = nl80211_set_mpath,
3420                 .policy = nl80211_policy,
3421                 .flags = GENL_ADMIN_PERM,
3422         },
3423         {
3424                 .cmd = NL80211_CMD_NEW_MPATH,
3425                 .doit = nl80211_new_mpath,
3426                 .policy = nl80211_policy,
3427                 .flags = GENL_ADMIN_PERM,
3428         },
3429         {
3430                 .cmd = NL80211_CMD_DEL_MPATH,
3431                 .doit = nl80211_del_mpath,
3432                 .policy = nl80211_policy,
3433                 .flags = GENL_ADMIN_PERM,
3434         },
3435         {
3436                 .cmd = NL80211_CMD_SET_BSS,
3437                 .doit = nl80211_set_bss,
3438                 .policy = nl80211_policy,
3439                 .flags = GENL_ADMIN_PERM,
3440         },
3441         {
3442                 .cmd = NL80211_CMD_GET_REG,
3443                 .doit = nl80211_get_reg,
3444                 .policy = nl80211_policy,
3445                 /* can be retrieved by unprivileged users */
3446         },
3447         {
3448                 .cmd = NL80211_CMD_SET_REG,
3449                 .doit = nl80211_set_reg,
3450                 .policy = nl80211_policy,
3451                 .flags = GENL_ADMIN_PERM,
3452         },
3453         {
3454                 .cmd = NL80211_CMD_REQ_SET_REG,
3455                 .doit = nl80211_req_set_reg,
3456                 .policy = nl80211_policy,
3457                 .flags = GENL_ADMIN_PERM,
3458         },
3459         {
3460                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
3461                 .doit = nl80211_get_mesh_params,
3462                 .policy = nl80211_policy,
3463                 /* can be retrieved by unprivileged users */
3464         },
3465         {
3466                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
3467                 .doit = nl80211_set_mesh_params,
3468                 .policy = nl80211_policy,
3469                 .flags = GENL_ADMIN_PERM,
3470         },
3471         {
3472                 .cmd = NL80211_CMD_TRIGGER_SCAN,
3473                 .doit = nl80211_trigger_scan,
3474                 .policy = nl80211_policy,
3475                 .flags = GENL_ADMIN_PERM,
3476         },
3477         {
3478                 .cmd = NL80211_CMD_GET_SCAN,
3479                 .policy = nl80211_policy,
3480                 .dumpit = nl80211_dump_scan,
3481         },
3482         {
3483                 .cmd = NL80211_CMD_AUTHENTICATE,
3484                 .doit = nl80211_authenticate,
3485                 .policy = nl80211_policy,
3486                 .flags = GENL_ADMIN_PERM,
3487         },
3488         {
3489                 .cmd = NL80211_CMD_ASSOCIATE,
3490                 .doit = nl80211_associate,
3491                 .policy = nl80211_policy,
3492                 .flags = GENL_ADMIN_PERM,
3493         },
3494         {
3495                 .cmd = NL80211_CMD_DEAUTHENTICATE,
3496                 .doit = nl80211_deauthenticate,
3497                 .policy = nl80211_policy,
3498                 .flags = GENL_ADMIN_PERM,
3499         },
3500         {
3501                 .cmd = NL80211_CMD_DISASSOCIATE,
3502                 .doit = nl80211_disassociate,
3503                 .policy = nl80211_policy,
3504                 .flags = GENL_ADMIN_PERM,
3505         },
3506         {
3507                 .cmd = NL80211_CMD_JOIN_IBSS,
3508                 .doit = nl80211_join_ibss,
3509                 .policy = nl80211_policy,
3510                 .flags = GENL_ADMIN_PERM,
3511         },
3512         {
3513                 .cmd = NL80211_CMD_LEAVE_IBSS,
3514                 .doit = nl80211_leave_ibss,
3515                 .policy = nl80211_policy,
3516                 .flags = GENL_ADMIN_PERM,
3517         },
3518 };
3519 static struct genl_multicast_group nl80211_mlme_mcgrp = {
3520         .name = "mlme",
3521 };
3522
3523 /* multicast groups */
3524 static struct genl_multicast_group nl80211_config_mcgrp = {
3525         .name = "config",
3526 };
3527 static struct genl_multicast_group nl80211_scan_mcgrp = {
3528         .name = "scan",
3529 };
3530 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
3531         .name = "regulatory",
3532 };
3533
3534 /* notification functions */
3535
3536 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
3537 {
3538         struct sk_buff *msg;
3539
3540         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3541         if (!msg)
3542                 return;
3543
3544         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
3545                 nlmsg_free(msg);
3546                 return;
3547         }
3548
3549         genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
3550 }
3551
3552 static int nl80211_send_scan_donemsg(struct sk_buff *msg,
3553                                     struct cfg80211_registered_device *rdev,
3554                                     struct net_device *netdev,
3555                                     u32 pid, u32 seq, int flags,
3556                                     u32 cmd)
3557 {
3558         void *hdr;
3559
3560         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
3561         if (!hdr)
3562                 return -1;
3563
3564         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3565         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3566
3567         /* XXX: we should probably bounce back the request? */
3568
3569         return genlmsg_end(msg, hdr);
3570
3571  nla_put_failure:
3572         genlmsg_cancel(msg, hdr);
3573         return -EMSGSIZE;
3574 }
3575
3576 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
3577                             struct net_device *netdev)
3578 {
3579         struct sk_buff *msg;
3580
3581         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3582         if (!msg)
3583                 return;
3584
3585         if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3586                                       NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
3587                 nlmsg_free(msg);
3588                 return;
3589         }
3590
3591         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3592 }
3593
3594 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
3595                                struct net_device *netdev)
3596 {
3597         struct sk_buff *msg;
3598
3599         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3600         if (!msg)
3601                 return;
3602
3603         if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3604                                       NL80211_CMD_SCAN_ABORTED) < 0) {
3605                 nlmsg_free(msg);
3606                 return;
3607         }
3608
3609         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3610 }
3611
3612 /*
3613  * This can happen on global regulatory changes or device specific settings
3614  * based on custom world regulatory domains.
3615  */
3616 void nl80211_send_reg_change_event(struct regulatory_request *request)
3617 {
3618         struct sk_buff *msg;
3619         void *hdr;
3620
3621         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3622         if (!msg)
3623                 return;
3624
3625         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
3626         if (!hdr) {
3627                 nlmsg_free(msg);
3628                 return;
3629         }
3630
3631         /* Userspace can always count this one always being set */
3632         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
3633
3634         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
3635                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3636                            NL80211_REGDOM_TYPE_WORLD);
3637         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
3638                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3639                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
3640         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
3641                  request->intersect)
3642                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3643                            NL80211_REGDOM_TYPE_INTERSECTION);
3644         else {
3645                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3646                            NL80211_REGDOM_TYPE_COUNTRY);
3647                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
3648         }
3649
3650         if (wiphy_idx_valid(request->wiphy_idx))
3651                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
3652
3653         if (genlmsg_end(msg, hdr) < 0) {
3654                 nlmsg_free(msg);
3655                 return;
3656         }
3657
3658         genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
3659
3660         return;
3661
3662 nla_put_failure:
3663         genlmsg_cancel(msg, hdr);
3664         nlmsg_free(msg);
3665 }
3666
3667 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
3668                                     struct net_device *netdev,
3669                                     const u8 *buf, size_t len,
3670                                     enum nl80211_commands cmd)
3671 {
3672         struct sk_buff *msg;
3673         void *hdr;
3674
3675         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3676         if (!msg)
3677                 return;
3678
3679         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3680         if (!hdr) {
3681                 nlmsg_free(msg);
3682                 return;
3683         }
3684
3685         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3686         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3687         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
3688
3689         if (genlmsg_end(msg, hdr) < 0) {
3690                 nlmsg_free(msg);
3691                 return;
3692         }
3693
3694         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3695         return;
3696
3697  nla_put_failure:
3698         genlmsg_cancel(msg, hdr);
3699         nlmsg_free(msg);
3700 }
3701
3702 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
3703                           struct net_device *netdev, const u8 *buf, size_t len)
3704 {
3705         nl80211_send_mlme_event(rdev, netdev, buf, len,
3706                                 NL80211_CMD_AUTHENTICATE);
3707 }
3708
3709 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
3710                            struct net_device *netdev, const u8 *buf,
3711                            size_t len)
3712 {
3713         nl80211_send_mlme_event(rdev, netdev, buf, len, NL80211_CMD_ASSOCIATE);
3714 }
3715
3716 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
3717                          struct net_device *netdev, const u8 *buf, size_t len)
3718 {
3719         nl80211_send_mlme_event(rdev, netdev, buf, len,
3720                                 NL80211_CMD_DEAUTHENTICATE);
3721 }
3722
3723 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
3724                            struct net_device *netdev, const u8 *buf,
3725                            size_t len)
3726 {
3727         nl80211_send_mlme_event(rdev, netdev, buf, len,
3728                                 NL80211_CMD_DISASSOCIATE);
3729 }
3730
3731 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
3732                                       struct net_device *netdev, int cmd,
3733                                       const u8 *addr)
3734 {
3735         struct sk_buff *msg;
3736         void *hdr;
3737
3738         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3739         if (!msg)
3740                 return;
3741
3742         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3743         if (!hdr) {
3744                 nlmsg_free(msg);
3745                 return;
3746         }
3747
3748         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3749         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3750         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
3751         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3752
3753         if (genlmsg_end(msg, hdr) < 0) {
3754                 nlmsg_free(msg);
3755                 return;
3756         }
3757
3758         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3759         return;
3760
3761  nla_put_failure:
3762         genlmsg_cancel(msg, hdr);
3763         nlmsg_free(msg);
3764 }
3765
3766 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
3767                                struct net_device *netdev, const u8 *addr)
3768 {
3769         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
3770                                   addr);
3771 }
3772
3773 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
3774                                 struct net_device *netdev, const u8 *addr)
3775 {
3776         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE, addr);
3777 }
3778
3779 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
3780                              struct net_device *netdev, const u8 *bssid,
3781                              gfp_t gfp)
3782 {
3783         struct sk_buff *msg;
3784         void *hdr;
3785
3786         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
3787         if (!msg)
3788                 return;
3789
3790         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
3791         if (!hdr) {
3792                 nlmsg_free(msg);
3793                 return;
3794         }
3795
3796         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3797         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3798         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
3799
3800         if (genlmsg_end(msg, hdr) < 0) {
3801                 nlmsg_free(msg);
3802                 return;
3803         }
3804
3805         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
3806         return;
3807
3808  nla_put_failure:
3809         genlmsg_cancel(msg, hdr);
3810         nlmsg_free(msg);
3811 }
3812
3813 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
3814                                  struct net_device *netdev, const u8 *addr,
3815                                  enum nl80211_key_type key_type, int key_id,
3816                                  const u8 *tsc)
3817 {
3818         struct sk_buff *msg;
3819         void *hdr;
3820
3821         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3822         if (!msg)
3823                 return;
3824
3825         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
3826         if (!hdr) {
3827                 nlmsg_free(msg);
3828                 return;
3829         }
3830
3831         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3832         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3833         if (addr)
3834                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3835         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
3836         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
3837         if (tsc)
3838                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
3839
3840         if (genlmsg_end(msg, hdr) < 0) {
3841                 nlmsg_free(msg);
3842                 return;
3843         }
3844
3845         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_KERNEL);
3846         return;
3847
3848  nla_put_failure:
3849         genlmsg_cancel(msg, hdr);
3850         nlmsg_free(msg);
3851 }
3852
3853 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
3854                                     struct ieee80211_channel *channel_before,
3855                                     struct ieee80211_channel *channel_after)
3856 {
3857         struct sk_buff *msg;
3858         void *hdr;
3859         struct nlattr *nl_freq;
3860
3861         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3862         if (!msg)
3863                 return;
3864
3865         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
3866         if (!hdr) {
3867                 nlmsg_free(msg);
3868                 return;
3869         }
3870
3871         /*
3872          * Since we are applying the beacon hint to a wiphy we know its
3873          * wiphy_idx is valid
3874          */
3875         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
3876
3877         /* Before */
3878         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
3879         if (!nl_freq)
3880                 goto nla_put_failure;
3881         if (nl80211_msg_put_channel(msg, channel_before))
3882                 goto nla_put_failure;
3883         nla_nest_end(msg, nl_freq);
3884
3885         /* After */
3886         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
3887         if (!nl_freq)
3888                 goto nla_put_failure;
3889         if (nl80211_msg_put_channel(msg, channel_after))
3890                 goto nla_put_failure;
3891         nla_nest_end(msg, nl_freq);
3892
3893         if (genlmsg_end(msg, hdr) < 0) {
3894                 nlmsg_free(msg);
3895                 return;
3896         }
3897
3898         genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
3899
3900         return;
3901
3902 nla_put_failure:
3903         genlmsg_cancel(msg, hdr);
3904         nlmsg_free(msg);
3905 }
3906
3907 /* initialisation/exit functions */
3908
3909 int nl80211_init(void)
3910 {
3911         int err, i;
3912
3913         err = genl_register_family(&nl80211_fam);
3914         if (err)
3915                 return err;
3916
3917         for (i = 0; i < ARRAY_SIZE(nl80211_ops); i++) {
3918                 err = genl_register_ops(&nl80211_fam, &nl80211_ops[i]);
3919                 if (err)
3920                         goto err_out;
3921         }
3922
3923         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
3924         if (err)
3925                 goto err_out;
3926
3927         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
3928         if (err)
3929                 goto err_out;
3930
3931         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
3932         if (err)
3933                 goto err_out;
3934
3935         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
3936         if (err)
3937                 goto err_out;
3938
3939         return 0;
3940  err_out:
3941         genl_unregister_family(&nl80211_fam);
3942         return err;
3943 }
3944
3945 void nl80211_exit(void)
3946 {
3947         genl_unregister_family(&nl80211_fam);
3948 }