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 = 20-1 },
  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         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1691             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
1692                 err = -EINVAL;
1693                 goto out;
1694         }
1695
1696         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1697         if (err)
1698                 goto out;
1699
1700         if (!drv->ops->change_station) {
1701                 err = -EOPNOTSUPP;
1702                 goto out;
1703         }
1704
1705         err = drv->ops->change_station(&drv->wiphy, dev, mac_addr, &params);
1706
1707  out:
1708         if (params.vlan)
1709                 dev_put(params.vlan);
1710         cfg80211_put_dev(drv);
1711         dev_put(dev);
1712  out_rtnl:
1713         rtnl_unlock();
1714
1715         return err;
1716 }
1717
1718 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1719 {
1720         struct cfg80211_registered_device *drv;
1721         int err;
1722         struct net_device *dev;
1723         struct station_parameters params;
1724         u8 *mac_addr = NULL;
1725
1726         memset(&params, 0, sizeof(params));
1727
1728         if (!info->attrs[NL80211_ATTR_MAC])
1729                 return -EINVAL;
1730
1731         if (!info->attrs[NL80211_ATTR_STA_AID])
1732                 return -EINVAL;
1733
1734         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1735                 return -EINVAL;
1736
1737         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1738                 return -EINVAL;
1739
1740         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1741         params.supported_rates =
1742                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1743         params.supported_rates_len =
1744                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1745         params.listen_interval =
1746                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1747
1748         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1749         if (!params.aid || params.aid > IEEE80211_MAX_AID)
1750                 return -EINVAL;
1751
1752         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1753                 params.ht_capa =
1754                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1755
1756         if (parse_station_flags(info, &params))
1757                 return -EINVAL;
1758
1759         rtnl_lock();
1760
1761         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1762         if (err)
1763                 goto out_rtnl;
1764
1765         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1766             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
1767                 err = -EINVAL;
1768                 goto out;
1769         }
1770
1771         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, &params.vlan);
1772         if (err)
1773                 goto out;
1774
1775         if (!drv->ops->add_station) {
1776                 err = -EOPNOTSUPP;
1777                 goto out;
1778         }
1779
1780         if (!netif_running(dev)) {
1781                 err = -ENETDOWN;
1782                 goto out;
1783         }
1784
1785         err = drv->ops->add_station(&drv->wiphy, dev, mac_addr, &params);
1786
1787  out:
1788         if (params.vlan)
1789                 dev_put(params.vlan);
1790         cfg80211_put_dev(drv);
1791         dev_put(dev);
1792  out_rtnl:
1793         rtnl_unlock();
1794
1795         return err;
1796 }
1797
1798 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1799 {
1800         struct cfg80211_registered_device *drv;
1801         int err;
1802         struct net_device *dev;
1803         u8 *mac_addr = NULL;
1804
1805         if (info->attrs[NL80211_ATTR_MAC])
1806                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1807
1808         rtnl_lock();
1809
1810         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1811         if (err)
1812                 goto out_rtnl;
1813
1814         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1815             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
1816                 err = -EINVAL;
1817                 goto out;
1818         }
1819
1820         if (!drv->ops->del_station) {
1821                 err = -EOPNOTSUPP;
1822                 goto out;
1823         }
1824
1825         err = drv->ops->del_station(&drv->wiphy, dev, mac_addr);
1826
1827  out:
1828         cfg80211_put_dev(drv);
1829         dev_put(dev);
1830  out_rtnl:
1831         rtnl_unlock();
1832
1833         return err;
1834 }
1835
1836 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
1837                                 int flags, struct net_device *dev,
1838                                 u8 *dst, u8 *next_hop,
1839                                 struct mpath_info *pinfo)
1840 {
1841         void *hdr;
1842         struct nlattr *pinfoattr;
1843
1844         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1845         if (!hdr)
1846                 return -1;
1847
1848         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1849         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
1850         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
1851
1852         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
1853         if (!pinfoattr)
1854                 goto nla_put_failure;
1855         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
1856                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
1857                             pinfo->frame_qlen);
1858         if (pinfo->filled & MPATH_INFO_DSN)
1859                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
1860                             pinfo->dsn);
1861         if (pinfo->filled & MPATH_INFO_METRIC)
1862                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
1863                             pinfo->metric);
1864         if (pinfo->filled & MPATH_INFO_EXPTIME)
1865                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
1866                             pinfo->exptime);
1867         if (pinfo->filled & MPATH_INFO_FLAGS)
1868                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
1869                             pinfo->flags);
1870         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
1871                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
1872                             pinfo->discovery_timeout);
1873         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
1874                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
1875                             pinfo->discovery_retries);
1876
1877         nla_nest_end(msg, pinfoattr);
1878
1879         return genlmsg_end(msg, hdr);
1880
1881  nla_put_failure:
1882         genlmsg_cancel(msg, hdr);
1883         return -EMSGSIZE;
1884 }
1885
1886 static int nl80211_dump_mpath(struct sk_buff *skb,
1887                               struct netlink_callback *cb)
1888 {
1889         struct mpath_info pinfo;
1890         struct cfg80211_registered_device *dev;
1891         struct net_device *netdev;
1892         u8 dst[ETH_ALEN];
1893         u8 next_hop[ETH_ALEN];
1894         int ifidx = cb->args[0];
1895         int path_idx = cb->args[1];
1896         int err;
1897
1898         if (!ifidx) {
1899                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1900                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1901                                   nl80211_policy);
1902                 if (err)
1903                         return err;
1904
1905                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1906                         return -EINVAL;
1907
1908                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1909                 if (!ifidx)
1910                         return -EINVAL;
1911         }
1912
1913         rtnl_lock();
1914
1915         netdev = __dev_get_by_index(&init_net, ifidx);
1916         if (!netdev) {
1917                 err = -ENODEV;
1918                 goto out_rtnl;
1919         }
1920
1921         dev = cfg80211_get_dev_from_ifindex(ifidx);
1922         if (IS_ERR(dev)) {
1923                 err = PTR_ERR(dev);
1924                 goto out_rtnl;
1925         }
1926
1927         if (!dev->ops->dump_mpath) {
1928                 err = -EOPNOTSUPP;
1929                 goto out_err;
1930         }
1931
1932         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1933                 err = -EOPNOTSUPP;
1934                 goto out;
1935         }
1936
1937         while (1) {
1938                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
1939                                            dst, next_hop, &pinfo);
1940                 if (err == -ENOENT)
1941                         break;
1942                 if (err)
1943                         goto out_err;
1944
1945                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
1946                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1947                                        netdev, dst, next_hop,
1948                                        &pinfo) < 0)
1949                         goto out;
1950
1951                 path_idx++;
1952         }
1953
1954
1955  out:
1956         cb->args[1] = path_idx;
1957         err = skb->len;
1958  out_err:
1959         cfg80211_put_dev(dev);
1960  out_rtnl:
1961         rtnl_unlock();
1962
1963         return err;
1964 }
1965
1966 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
1967 {
1968         struct cfg80211_registered_device *drv;
1969         int err;
1970         struct net_device *dev;
1971         struct mpath_info pinfo;
1972         struct sk_buff *msg;
1973         u8 *dst = NULL;
1974         u8 next_hop[ETH_ALEN];
1975
1976         memset(&pinfo, 0, sizeof(pinfo));
1977
1978         if (!info->attrs[NL80211_ATTR_MAC])
1979                 return -EINVAL;
1980
1981         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
1982
1983         rtnl_lock();
1984
1985         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
1986         if (err)
1987                 goto out_rtnl;
1988
1989         if (!drv->ops->get_mpath) {
1990                 err = -EOPNOTSUPP;
1991                 goto out;
1992         }
1993
1994         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
1995                 err = -EOPNOTSUPP;
1996                 goto out;
1997         }
1998
1999         err = drv->ops->get_mpath(&drv->wiphy, dev, dst, next_hop, &pinfo);
2000         if (err)
2001                 goto out;
2002
2003         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2004         if (!msg)
2005                 goto out;
2006
2007         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2008                                  dev, dst, next_hop, &pinfo) < 0)
2009                 goto out_free;
2010
2011         err = genlmsg_unicast(msg, info->snd_pid);
2012         goto out;
2013
2014  out_free:
2015         nlmsg_free(msg);
2016  out:
2017         cfg80211_put_dev(drv);
2018         dev_put(dev);
2019  out_rtnl:
2020         rtnl_unlock();
2021
2022         return err;
2023 }
2024
2025 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2026 {
2027         struct cfg80211_registered_device *drv;
2028         int err;
2029         struct net_device *dev;
2030         u8 *dst = NULL;
2031         u8 *next_hop = NULL;
2032
2033         if (!info->attrs[NL80211_ATTR_MAC])
2034                 return -EINVAL;
2035
2036         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2037                 return -EINVAL;
2038
2039         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2040         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2041
2042         rtnl_lock();
2043
2044         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2045         if (err)
2046                 goto out_rtnl;
2047
2048         if (!drv->ops->change_mpath) {
2049                 err = -EOPNOTSUPP;
2050                 goto out;
2051         }
2052
2053         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2054                 err = -EOPNOTSUPP;
2055                 goto out;
2056         }
2057
2058         if (!netif_running(dev)) {
2059                 err = -ENETDOWN;
2060                 goto out;
2061         }
2062
2063         err = drv->ops->change_mpath(&drv->wiphy, dev, dst, next_hop);
2064
2065  out:
2066         cfg80211_put_dev(drv);
2067         dev_put(dev);
2068  out_rtnl:
2069         rtnl_unlock();
2070
2071         return err;
2072 }
2073 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2074 {
2075         struct cfg80211_registered_device *drv;
2076         int err;
2077         struct net_device *dev;
2078         u8 *dst = NULL;
2079         u8 *next_hop = NULL;
2080
2081         if (!info->attrs[NL80211_ATTR_MAC])
2082                 return -EINVAL;
2083
2084         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2085                 return -EINVAL;
2086
2087         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2088         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2089
2090         rtnl_lock();
2091
2092         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2093         if (err)
2094                 goto out_rtnl;
2095
2096         if (!drv->ops->add_mpath) {
2097                 err = -EOPNOTSUPP;
2098                 goto out;
2099         }
2100
2101         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2102                 err = -EOPNOTSUPP;
2103                 goto out;
2104         }
2105
2106         if (!netif_running(dev)) {
2107                 err = -ENETDOWN;
2108                 goto out;
2109         }
2110
2111         err = drv->ops->add_mpath(&drv->wiphy, dev, dst, next_hop);
2112
2113  out:
2114         cfg80211_put_dev(drv);
2115         dev_put(dev);
2116  out_rtnl:
2117         rtnl_unlock();
2118
2119         return err;
2120 }
2121
2122 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2123 {
2124         struct cfg80211_registered_device *drv;
2125         int err;
2126         struct net_device *dev;
2127         u8 *dst = NULL;
2128
2129         if (info->attrs[NL80211_ATTR_MAC])
2130                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2131
2132         rtnl_lock();
2133
2134         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2135         if (err)
2136                 goto out_rtnl;
2137
2138         if (!drv->ops->del_mpath) {
2139                 err = -EOPNOTSUPP;
2140                 goto out;
2141         }
2142
2143         err = drv->ops->del_mpath(&drv->wiphy, dev, dst);
2144
2145  out:
2146         cfg80211_put_dev(drv);
2147         dev_put(dev);
2148  out_rtnl:
2149         rtnl_unlock();
2150
2151         return err;
2152 }
2153
2154 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2155 {
2156         struct cfg80211_registered_device *drv;
2157         int err;
2158         struct net_device *dev;
2159         struct bss_parameters params;
2160
2161         memset(&params, 0, sizeof(params));
2162         /* default to not changing parameters */
2163         params.use_cts_prot = -1;
2164         params.use_short_preamble = -1;
2165         params.use_short_slot_time = -1;
2166
2167         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2168                 params.use_cts_prot =
2169                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2170         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2171                 params.use_short_preamble =
2172                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2173         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2174                 params.use_short_slot_time =
2175                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2176         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2177                 params.basic_rates =
2178                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2179                 params.basic_rates_len =
2180                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2181         }
2182
2183         rtnl_lock();
2184
2185         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2186         if (err)
2187                 goto out_rtnl;
2188
2189         if (!drv->ops->change_bss) {
2190                 err = -EOPNOTSUPP;
2191                 goto out;
2192         }
2193
2194         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2195                 err = -EOPNOTSUPP;
2196                 goto out;
2197         }
2198
2199         err = drv->ops->change_bss(&drv->wiphy, dev, &params);
2200
2201  out:
2202         cfg80211_put_dev(drv);
2203         dev_put(dev);
2204  out_rtnl:
2205         rtnl_unlock();
2206
2207         return err;
2208 }
2209
2210 static const struct nla_policy
2211         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2212         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2213         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2214         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2215         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2216         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2217         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2218 };
2219
2220 static int parse_reg_rule(struct nlattr *tb[],
2221         struct ieee80211_reg_rule *reg_rule)
2222 {
2223         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2224         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2225
2226         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2227                 return -EINVAL;
2228         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2229                 return -EINVAL;
2230         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2231                 return -EINVAL;
2232         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2233                 return -EINVAL;
2234         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2235                 return -EINVAL;
2236
2237         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2238
2239         freq_range->start_freq_khz =
2240                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2241         freq_range->end_freq_khz =
2242                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2243         freq_range->max_bandwidth_khz =
2244                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2245
2246         power_rule->max_eirp =
2247                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2248
2249         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2250                 power_rule->max_antenna_gain =
2251                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2252
2253         return 0;
2254 }
2255
2256 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2257 {
2258         int r;
2259         char *data = NULL;
2260
2261         /*
2262          * You should only get this when cfg80211 hasn't yet initialized
2263          * completely when built-in to the kernel right between the time
2264          * window between nl80211_init() and regulatory_init(), if that is
2265          * even possible.
2266          */
2267         mutex_lock(&cfg80211_mutex);
2268         if (unlikely(!cfg80211_regdomain)) {
2269                 mutex_unlock(&cfg80211_mutex);
2270                 return -EINPROGRESS;
2271         }
2272         mutex_unlock(&cfg80211_mutex);
2273
2274         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2275                 return -EINVAL;
2276
2277         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2278
2279 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2280         /* We ignore world regdom requests with the old regdom setup */
2281         if (is_world_regdom(data))
2282                 return -EINVAL;
2283 #endif
2284
2285         r = regulatory_hint_user(data);
2286
2287         return r;
2288 }
2289
2290 static int nl80211_get_mesh_params(struct sk_buff *skb,
2291         struct genl_info *info)
2292 {
2293         struct cfg80211_registered_device *drv;
2294         struct mesh_config cur_params;
2295         int err;
2296         struct net_device *dev;
2297         void *hdr;
2298         struct nlattr *pinfoattr;
2299         struct sk_buff *msg;
2300
2301         rtnl_lock();
2302
2303         /* Look up our device */
2304         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2305         if (err)
2306                 goto out_rtnl;
2307
2308         if (!drv->ops->get_mesh_params) {
2309                 err = -EOPNOTSUPP;
2310                 goto out;
2311         }
2312
2313         /* Get the mesh params */
2314         err = drv->ops->get_mesh_params(&drv->wiphy, dev, &cur_params);
2315         if (err)
2316                 goto out;
2317
2318         /* Draw up a netlink message to send back */
2319         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2320         if (!msg) {
2321                 err = -ENOBUFS;
2322                 goto out;
2323         }
2324         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2325                              NL80211_CMD_GET_MESH_PARAMS);
2326         if (!hdr)
2327                 goto nla_put_failure;
2328         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2329         if (!pinfoattr)
2330                 goto nla_put_failure;
2331         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2332         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2333                         cur_params.dot11MeshRetryTimeout);
2334         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2335                         cur_params.dot11MeshConfirmTimeout);
2336         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2337                         cur_params.dot11MeshHoldingTimeout);
2338         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2339                         cur_params.dot11MeshMaxPeerLinks);
2340         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2341                         cur_params.dot11MeshMaxRetries);
2342         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2343                         cur_params.dot11MeshTTL);
2344         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2345                         cur_params.auto_open_plinks);
2346         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2347                         cur_params.dot11MeshHWMPmaxPREQretries);
2348         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2349                         cur_params.path_refresh_time);
2350         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2351                         cur_params.min_discovery_timeout);
2352         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2353                         cur_params.dot11MeshHWMPactivePathTimeout);
2354         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2355                         cur_params.dot11MeshHWMPpreqMinInterval);
2356         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2357                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2358         nla_nest_end(msg, pinfoattr);
2359         genlmsg_end(msg, hdr);
2360         err = genlmsg_unicast(msg, info->snd_pid);
2361         goto out;
2362
2363  nla_put_failure:
2364         genlmsg_cancel(msg, hdr);
2365         err = -EMSGSIZE;
2366  out:
2367         /* Cleanup */
2368         cfg80211_put_dev(drv);
2369         dev_put(dev);
2370  out_rtnl:
2371         rtnl_unlock();
2372
2373         return err;
2374 }
2375
2376 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2377 do {\
2378         if (table[attr_num]) {\
2379                 cfg.param = nla_fn(table[attr_num]); \
2380                 mask |= (1 << (attr_num - 1)); \
2381         } \
2382 } while (0);\
2383
2384 static struct nla_policy
2385 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2386         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2387         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2388         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2389         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2390         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2391         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2392         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2393
2394         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2395         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2396         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2397         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2398         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2399         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2400 };
2401
2402 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2403 {
2404         int err;
2405         u32 mask;
2406         struct cfg80211_registered_device *drv;
2407         struct net_device *dev;
2408         struct mesh_config cfg;
2409         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2410         struct nlattr *parent_attr;
2411
2412         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2413         if (!parent_attr)
2414                 return -EINVAL;
2415         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2416                         parent_attr, nl80211_meshconf_params_policy))
2417                 return -EINVAL;
2418
2419         rtnl_lock();
2420
2421         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2422         if (err)
2423                 goto out_rtnl;
2424
2425         if (!drv->ops->set_mesh_params) {
2426                 err = -EOPNOTSUPP;
2427                 goto out;
2428         }
2429
2430         /* This makes sure that there aren't more than 32 mesh config
2431          * parameters (otherwise our bitfield scheme would not work.) */
2432         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2433
2434         /* Fill in the params struct */
2435         mask = 0;
2436         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2437                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2438         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2439                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2440         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2441                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2442         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2443                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2444         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2445                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2446         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2447                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2448         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2449                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2450         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2451                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2452                         nla_get_u8);
2453         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2454                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2455         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2456                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2457                         nla_get_u16);
2458         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2459                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2460                         nla_get_u32);
2461         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2462                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2463                         nla_get_u16);
2464         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2465                         dot11MeshHWMPnetDiameterTraversalTime,
2466                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2467                         nla_get_u16);
2468
2469         /* Apply changes */
2470         err = drv->ops->set_mesh_params(&drv->wiphy, dev, &cfg, mask);
2471
2472  out:
2473         /* cleanup */
2474         cfg80211_put_dev(drv);
2475         dev_put(dev);
2476  out_rtnl:
2477         rtnl_unlock();
2478
2479         return err;
2480 }
2481
2482 #undef FILL_IN_MESH_PARAM_IF_SET
2483
2484 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2485 {
2486         struct sk_buff *msg;
2487         void *hdr = NULL;
2488         struct nlattr *nl_reg_rules;
2489         unsigned int i;
2490         int err = -EINVAL;
2491
2492         mutex_lock(&cfg80211_mutex);
2493
2494         if (!cfg80211_regdomain)
2495                 goto out;
2496
2497         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2498         if (!msg) {
2499                 err = -ENOBUFS;
2500                 goto out;
2501         }
2502
2503         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2504                              NL80211_CMD_GET_REG);
2505         if (!hdr)
2506                 goto nla_put_failure;
2507
2508         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2509                 cfg80211_regdomain->alpha2);
2510
2511         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2512         if (!nl_reg_rules)
2513                 goto nla_put_failure;
2514
2515         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2516                 struct nlattr *nl_reg_rule;
2517                 const struct ieee80211_reg_rule *reg_rule;
2518                 const struct ieee80211_freq_range *freq_range;
2519                 const struct ieee80211_power_rule *power_rule;
2520
2521                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2522                 freq_range = &reg_rule->freq_range;
2523                 power_rule = &reg_rule->power_rule;
2524
2525                 nl_reg_rule = nla_nest_start(msg, i);
2526                 if (!nl_reg_rule)
2527                         goto nla_put_failure;
2528
2529                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2530                         reg_rule->flags);
2531                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2532                         freq_range->start_freq_khz);
2533                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2534                         freq_range->end_freq_khz);
2535                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2536                         freq_range->max_bandwidth_khz);
2537                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2538                         power_rule->max_antenna_gain);
2539                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2540                         power_rule->max_eirp);
2541
2542                 nla_nest_end(msg, nl_reg_rule);
2543         }
2544
2545         nla_nest_end(msg, nl_reg_rules);
2546
2547         genlmsg_end(msg, hdr);
2548         err = genlmsg_unicast(msg, info->snd_pid);
2549         goto out;
2550
2551 nla_put_failure:
2552         genlmsg_cancel(msg, hdr);
2553         err = -EMSGSIZE;
2554 out:
2555         mutex_unlock(&cfg80211_mutex);
2556         return err;
2557 }
2558
2559 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2560 {
2561         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2562         struct nlattr *nl_reg_rule;
2563         char *alpha2 = NULL;
2564         int rem_reg_rules = 0, r = 0;
2565         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2566         struct ieee80211_regdomain *rd = NULL;
2567
2568         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2569                 return -EINVAL;
2570
2571         if (!info->attrs[NL80211_ATTR_REG_RULES])
2572                 return -EINVAL;
2573
2574         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2575
2576         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2577                         rem_reg_rules) {
2578                 num_rules++;
2579                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2580                         return -EINVAL;
2581         }
2582
2583         mutex_lock(&cfg80211_mutex);
2584
2585         if (!reg_is_valid_request(alpha2)) {
2586                 r = -EINVAL;
2587                 goto bad_reg;
2588         }
2589
2590         size_of_regd = sizeof(struct ieee80211_regdomain) +
2591                 (num_rules * sizeof(struct ieee80211_reg_rule));
2592
2593         rd = kzalloc(size_of_regd, GFP_KERNEL);
2594         if (!rd) {
2595                 r = -ENOMEM;
2596                 goto bad_reg;
2597         }
2598
2599         rd->n_reg_rules = num_rules;
2600         rd->alpha2[0] = alpha2[0];
2601         rd->alpha2[1] = alpha2[1];
2602
2603         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2604                         rem_reg_rules) {
2605                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2606                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2607                         reg_rule_policy);
2608                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2609                 if (r)
2610                         goto bad_reg;
2611
2612                 rule_idx++;
2613
2614                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2615                         r = -EINVAL;
2616                         goto bad_reg;
2617                 }
2618         }
2619
2620         BUG_ON(rule_idx != num_rules);
2621
2622         r = set_regdom(rd);
2623
2624         mutex_unlock(&cfg80211_mutex);
2625
2626         return r;
2627
2628  bad_reg:
2629         mutex_unlock(&cfg80211_mutex);
2630         kfree(rd);
2631         return r;
2632 }
2633
2634 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2635 {
2636         struct cfg80211_registered_device *drv;
2637         struct net_device *dev;
2638         struct cfg80211_scan_request *request;
2639         struct cfg80211_ssid *ssid;
2640         struct ieee80211_channel *channel;
2641         struct nlattr *attr;
2642         struct wiphy *wiphy;
2643         int err, tmp, n_ssids = 0, n_channels = 0, i;
2644         enum ieee80211_band band;
2645         size_t ie_len;
2646
2647         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2648                 return -EINVAL;
2649
2650         rtnl_lock();
2651
2652         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2653         if (err)
2654                 goto out_rtnl;
2655
2656         wiphy = &drv->wiphy;
2657
2658         if (!drv->ops->scan) {
2659                 err = -EOPNOTSUPP;
2660                 goto out;
2661         }
2662
2663         if (!netif_running(dev)) {
2664                 err = -ENETDOWN;
2665                 goto out;
2666         }
2667
2668         if (drv->scan_req) {
2669                 err = -EBUSY;
2670                 goto out;
2671         }
2672
2673         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2674                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp)
2675                         n_channels++;
2676                 if (!n_channels) {
2677                         err = -EINVAL;
2678                         goto out;
2679                 }
2680         } else {
2681                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2682                         if (wiphy->bands[band])
2683                                 n_channels += wiphy->bands[band]->n_channels;
2684         }
2685
2686         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2687                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2688                         n_ssids++;
2689
2690         if (n_ssids > wiphy->max_scan_ssids) {
2691                 err = -EINVAL;
2692                 goto out;
2693         }
2694
2695         if (info->attrs[NL80211_ATTR_IE])
2696                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2697         else
2698                 ie_len = 0;
2699
2700         if (ie_len > wiphy->max_scan_ie_len) {
2701                 err = -EINVAL;
2702                 goto out;
2703         }
2704
2705         request = kzalloc(sizeof(*request)
2706                         + sizeof(*ssid) * n_ssids
2707                         + sizeof(channel) * n_channels
2708                         + ie_len, GFP_KERNEL);
2709         if (!request) {
2710                 err = -ENOMEM;
2711                 goto out;
2712         }
2713
2714         request->channels = (void *)((char *)request + sizeof(*request));
2715         request->n_channels = n_channels;
2716         if (n_ssids)
2717                 request->ssids = (void *)(request->channels + n_channels);
2718         request->n_ssids = n_ssids;
2719         if (ie_len) {
2720                 if (request->ssids)
2721                         request->ie = (void *)(request->ssids + n_ssids);
2722                 else
2723                         request->ie = (void *)(request->channels + n_channels);
2724         }
2725
2726         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2727                 /* user specified, bail out if channel not found */
2728                 request->n_channels = n_channels;
2729                 i = 0;
2730                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2731                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2732                         if (!request->channels[i]) {
2733                                 err = -EINVAL;
2734                                 goto out_free;
2735                         }
2736                         i++;
2737                 }
2738         } else {
2739                 /* all channels */
2740                 i = 0;
2741                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2742                         int j;
2743                         if (!wiphy->bands[band])
2744                                 continue;
2745                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2746                                 request->channels[i] = &wiphy->bands[band]->channels[j];
2747                                 i++;
2748                         }
2749                 }
2750         }
2751
2752         i = 0;
2753         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2754                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2755                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2756                                 err = -EINVAL;
2757                                 goto out_free;
2758                         }
2759                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2760                         request->ssids[i].ssid_len = nla_len(attr);
2761                         i++;
2762                 }
2763         }
2764
2765         if (info->attrs[NL80211_ATTR_IE]) {
2766                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2767                 memcpy((void *)request->ie,
2768                        nla_data(info->attrs[NL80211_ATTR_IE]),
2769                        request->ie_len);
2770         }
2771
2772         request->ifidx = dev->ifindex;
2773         request->wiphy = &drv->wiphy;
2774
2775         drv->scan_req = request;
2776         err = drv->ops->scan(&drv->wiphy, dev, request);
2777
2778  out_free:
2779         if (err) {
2780                 drv->scan_req = NULL;
2781                 kfree(request);
2782         }
2783  out:
2784         cfg80211_put_dev(drv);
2785         dev_put(dev);
2786  out_rtnl:
2787         rtnl_unlock();
2788
2789         return err;
2790 }
2791
2792 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
2793                             struct cfg80211_registered_device *rdev,
2794                             struct net_device *dev,
2795                             struct cfg80211_bss *res)
2796 {
2797         void *hdr;
2798         struct nlattr *bss;
2799
2800         hdr = nl80211hdr_put(msg, pid, seq, flags,
2801                              NL80211_CMD_NEW_SCAN_RESULTS);
2802         if (!hdr)
2803                 return -1;
2804
2805         NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
2806                     rdev->bss_generation);
2807         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2808
2809         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
2810         if (!bss)
2811                 goto nla_put_failure;
2812         if (!is_zero_ether_addr(res->bssid))
2813                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
2814         if (res->information_elements && res->len_information_elements)
2815                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
2816                         res->len_information_elements,
2817                         res->information_elements);
2818         if (res->tsf)
2819                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
2820         if (res->beacon_interval)
2821                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
2822         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
2823         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
2824
2825         switch (rdev->wiphy.signal_type) {
2826         case CFG80211_SIGNAL_TYPE_MBM:
2827                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
2828                 break;
2829         case CFG80211_SIGNAL_TYPE_UNSPEC:
2830                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
2831                 break;
2832         default:
2833                 break;
2834         }
2835
2836         nla_nest_end(msg, bss);
2837
2838         return genlmsg_end(msg, hdr);
2839
2840  nla_put_failure:
2841         genlmsg_cancel(msg, hdr);
2842         return -EMSGSIZE;
2843 }
2844
2845 static int nl80211_dump_scan(struct sk_buff *skb,
2846                              struct netlink_callback *cb)
2847 {
2848         struct cfg80211_registered_device *dev;
2849         struct net_device *netdev;
2850         struct cfg80211_internal_bss *scan;
2851         int ifidx = cb->args[0];
2852         int start = cb->args[1], idx = 0;
2853         int err;
2854
2855         if (!ifidx) {
2856                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2857                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2858                                   nl80211_policy);
2859                 if (err)
2860                         return err;
2861
2862                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2863                         return -EINVAL;
2864
2865                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2866                 if (!ifidx)
2867                         return -EINVAL;
2868                 cb->args[0] = ifidx;
2869         }
2870
2871         netdev = dev_get_by_index(&init_net, ifidx);
2872         if (!netdev)
2873                 return -ENODEV;
2874
2875         dev = cfg80211_get_dev_from_ifindex(ifidx);
2876         if (IS_ERR(dev)) {
2877                 err = PTR_ERR(dev);
2878                 goto out_put_netdev;
2879         }
2880
2881         spin_lock_bh(&dev->bss_lock);
2882         cfg80211_bss_expire(dev);
2883
2884         list_for_each_entry(scan, &dev->bss_list, list) {
2885                 if (++idx <= start)
2886                         continue;
2887                 if (nl80211_send_bss(skb,
2888                                 NETLINK_CB(cb->skb).pid,
2889                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2890                                 dev, netdev, &scan->pub) < 0) {
2891                         idx--;
2892                         goto out;
2893                 }
2894         }
2895
2896  out:
2897         spin_unlock_bh(&dev->bss_lock);
2898
2899         cb->args[1] = idx;
2900         err = skb->len;
2901         cfg80211_put_dev(dev);
2902  out_put_netdev:
2903         dev_put(netdev);
2904
2905         return err;
2906 }
2907
2908 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
2909 {
2910         return auth_type == NL80211_AUTHTYPE_OPEN_SYSTEM ||
2911                 auth_type == NL80211_AUTHTYPE_SHARED_KEY ||
2912                 auth_type == NL80211_AUTHTYPE_FT ||
2913                 auth_type == NL80211_AUTHTYPE_NETWORK_EAP;
2914 }
2915
2916 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
2917 {
2918         struct cfg80211_registered_device *drv;
2919         struct net_device *dev;
2920         struct cfg80211_auth_request req;
2921         struct wiphy *wiphy;
2922         int err;
2923
2924         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2925                 return -EINVAL;
2926
2927         if (!info->attrs[NL80211_ATTR_MAC])
2928                 return -EINVAL;
2929
2930         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
2931                 return -EINVAL;
2932
2933         rtnl_lock();
2934
2935         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
2936         if (err)
2937                 goto unlock_rtnl;
2938
2939         if (!drv->ops->auth) {
2940                 err = -EOPNOTSUPP;
2941                 goto out;
2942         }
2943
2944         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
2945                 err = -EOPNOTSUPP;
2946                 goto out;
2947         }
2948
2949         if (!netif_running(dev)) {
2950                 err = -ENETDOWN;
2951                 goto out;
2952         }
2953
2954         wiphy = &drv->wiphy;
2955         memset(&req, 0, sizeof(req));
2956
2957         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2958
2959         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2960                 req.chan = ieee80211_get_channel(
2961                         wiphy,
2962                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
2963                 if (!req.chan) {
2964                         err = -EINVAL;
2965                         goto out;
2966                 }
2967         }
2968
2969         if (info->attrs[NL80211_ATTR_SSID]) {
2970                 req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2971                 req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
2972         }
2973
2974         if (info->attrs[NL80211_ATTR_IE]) {
2975                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
2976                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2977         }
2978
2979         req.auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
2980         if (!nl80211_valid_auth_type(req.auth_type)) {
2981                 err = -EINVAL;
2982                 goto out;
2983         }
2984
2985         err = drv->ops->auth(&drv->wiphy, dev, &req);
2986
2987 out:
2988         cfg80211_put_dev(drv);
2989         dev_put(dev);
2990 unlock_rtnl:
2991         rtnl_unlock();
2992         return err;
2993 }
2994
2995 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
2996 {
2997         struct cfg80211_registered_device *drv;
2998         struct net_device *dev;
2999         struct cfg80211_assoc_request req;
3000         struct wiphy *wiphy;
3001         int err;
3002
3003         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3004                 return -EINVAL;
3005
3006         if (!info->attrs[NL80211_ATTR_MAC] ||
3007             !info->attrs[NL80211_ATTR_SSID])
3008                 return -EINVAL;
3009
3010         rtnl_lock();
3011
3012         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3013         if (err)
3014                 goto unlock_rtnl;
3015
3016         if (!drv->ops->assoc) {
3017                 err = -EOPNOTSUPP;
3018                 goto out;
3019         }
3020
3021         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3022                 err = -EOPNOTSUPP;
3023                 goto out;
3024         }
3025
3026         if (!netif_running(dev)) {
3027                 err = -ENETDOWN;
3028                 goto out;
3029         }
3030
3031         wiphy = &drv->wiphy;
3032         memset(&req, 0, sizeof(req));
3033
3034         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3035
3036         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3037                 req.chan = ieee80211_get_channel(
3038                         wiphy,
3039                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3040                 if (!req.chan) {
3041                         err = -EINVAL;
3042                         goto out;
3043                 }
3044         }
3045
3046         req.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3047         req.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3048
3049         if (info->attrs[NL80211_ATTR_IE]) {
3050                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3051                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3052         }
3053
3054         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3055                 enum nl80211_mfp use_mfp =
3056                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3057                 if (use_mfp == NL80211_MFP_REQUIRED)
3058                         req.use_mfp = true;
3059                 else if (use_mfp != NL80211_MFP_NO) {
3060                         err = -EINVAL;
3061                         goto out;
3062                 }
3063         }
3064
3065         req.control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3066
3067         err = drv->ops->assoc(&drv->wiphy, dev, &req);
3068
3069 out:
3070         cfg80211_put_dev(drv);
3071         dev_put(dev);
3072 unlock_rtnl:
3073         rtnl_unlock();
3074         return err;
3075 }
3076
3077 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3078 {
3079         struct cfg80211_registered_device *drv;
3080         struct net_device *dev;
3081         struct cfg80211_deauth_request req;
3082         struct wiphy *wiphy;
3083         int err;
3084
3085         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3086                 return -EINVAL;
3087
3088         if (!info->attrs[NL80211_ATTR_MAC])
3089                 return -EINVAL;
3090
3091         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3092                 return -EINVAL;
3093
3094         rtnl_lock();
3095
3096         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3097         if (err)
3098                 goto unlock_rtnl;
3099
3100         if (!drv->ops->deauth) {
3101                 err = -EOPNOTSUPP;
3102                 goto out;
3103         }
3104
3105         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3106                 err = -EOPNOTSUPP;
3107                 goto out;
3108         }
3109
3110         if (!netif_running(dev)) {
3111                 err = -ENETDOWN;
3112                 goto out;
3113         }
3114
3115         wiphy = &drv->wiphy;
3116         memset(&req, 0, sizeof(req));
3117
3118         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3119
3120         req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3121         if (req.reason_code == 0) {
3122                 /* Reason Code 0 is reserved */
3123                 err = -EINVAL;
3124                 goto out;
3125         }
3126
3127         if (info->attrs[NL80211_ATTR_IE]) {
3128                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3129                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3130         }
3131
3132         err = drv->ops->deauth(&drv->wiphy, dev, &req);
3133
3134 out:
3135         cfg80211_put_dev(drv);
3136         dev_put(dev);
3137 unlock_rtnl:
3138         rtnl_unlock();
3139         return err;
3140 }
3141
3142 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3143 {
3144         struct cfg80211_registered_device *drv;
3145         struct net_device *dev;
3146         struct cfg80211_disassoc_request req;
3147         struct wiphy *wiphy;
3148         int err;
3149
3150         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3151                 return -EINVAL;
3152
3153         if (!info->attrs[NL80211_ATTR_MAC])
3154                 return -EINVAL;
3155
3156         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3157                 return -EINVAL;
3158
3159         rtnl_lock();
3160
3161         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3162         if (err)
3163                 goto unlock_rtnl;
3164
3165         if (!drv->ops->disassoc) {
3166                 err = -EOPNOTSUPP;
3167                 goto out;
3168         }
3169
3170         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3171                 err = -EOPNOTSUPP;
3172                 goto out;
3173         }
3174
3175         if (!netif_running(dev)) {
3176                 err = -ENETDOWN;
3177                 goto out;
3178         }
3179
3180         wiphy = &drv->wiphy;
3181         memset(&req, 0, sizeof(req));
3182
3183         req.peer_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3184
3185         req.reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3186         if (req.reason_code == 0) {
3187                 /* Reason Code 0 is reserved */
3188                 err = -EINVAL;
3189                 goto out;
3190         }
3191
3192         if (info->attrs[NL80211_ATTR_IE]) {
3193                 req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3194                 req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3195         }
3196
3197         err = drv->ops->disassoc(&drv->wiphy, dev, &req);
3198
3199 out:
3200         cfg80211_put_dev(drv);
3201         dev_put(dev);
3202 unlock_rtnl:
3203         rtnl_unlock();
3204         return err;
3205 }
3206
3207 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3208 {
3209         struct cfg80211_registered_device *drv;
3210         struct net_device *dev;
3211         struct cfg80211_ibss_params ibss;
3212         struct wiphy *wiphy;
3213         int err;
3214
3215         memset(&ibss, 0, sizeof(ibss));
3216
3217         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3218                 return -EINVAL;
3219
3220         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3221             !info->attrs[NL80211_ATTR_SSID] ||
3222             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3223                 return -EINVAL;
3224
3225         ibss.beacon_interval = 100;
3226
3227         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3228                 ibss.beacon_interval =
3229                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3230                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3231                         return -EINVAL;
3232         }
3233
3234         rtnl_lock();
3235
3236         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3237         if (err)
3238                 goto unlock_rtnl;
3239
3240         if (!drv->ops->join_ibss) {
3241                 err = -EOPNOTSUPP;
3242                 goto out;
3243         }
3244
3245         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3246                 err = -EOPNOTSUPP;
3247                 goto out;
3248         }
3249
3250         if (!netif_running(dev)) {
3251                 err = -ENETDOWN;
3252                 goto out;
3253         }
3254
3255         wiphy = &drv->wiphy;
3256
3257         if (info->attrs[NL80211_ATTR_MAC])
3258                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3259         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3260         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3261
3262         if (info->attrs[NL80211_ATTR_IE]) {
3263                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3264                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3265         }
3266
3267         ibss.channel = ieee80211_get_channel(wiphy,
3268                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3269         if (!ibss.channel ||
3270             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3271             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3272                 err = -EINVAL;
3273                 goto out;
3274         }
3275
3276         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3277
3278         err = cfg80211_join_ibss(drv, dev, &ibss);
3279
3280 out:
3281         cfg80211_put_dev(drv);
3282         dev_put(dev);
3283 unlock_rtnl:
3284         rtnl_unlock();
3285         return err;
3286 }
3287
3288 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3289 {
3290         struct cfg80211_registered_device *drv;
3291         struct net_device *dev;
3292         int err;
3293
3294         rtnl_lock();
3295
3296         err = get_drv_dev_by_info_ifindex(info->attrs, &drv, &dev);
3297         if (err)
3298                 goto unlock_rtnl;
3299
3300         if (!drv->ops->leave_ibss) {
3301                 err = -EOPNOTSUPP;
3302                 goto out;
3303         }
3304
3305         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3306                 err = -EOPNOTSUPP;
3307                 goto out;
3308         }
3309
3310         if (!netif_running(dev)) {
3311                 err = -ENETDOWN;
3312                 goto out;
3313         }
3314
3315         err = cfg80211_leave_ibss(drv, dev, false);
3316
3317 out:
3318         cfg80211_put_dev(drv);
3319         dev_put(dev);
3320 unlock_rtnl:
3321         rtnl_unlock();
3322         return err;
3323 }
3324
3325 static struct genl_ops nl80211_ops[] = {
3326         {
3327                 .cmd = NL80211_CMD_GET_WIPHY,
3328                 .doit = nl80211_get_wiphy,
3329                 .dumpit = nl80211_dump_wiphy,
3330                 .policy = nl80211_policy,
3331                 /* can be retrieved by unprivileged users */
3332         },
3333         {
3334                 .cmd = NL80211_CMD_SET_WIPHY,
3335                 .doit = nl80211_set_wiphy,
3336                 .policy = nl80211_policy,
3337                 .flags = GENL_ADMIN_PERM,
3338         },
3339         {
3340                 .cmd = NL80211_CMD_GET_INTERFACE,
3341                 .doit = nl80211_get_interface,
3342                 .dumpit = nl80211_dump_interface,
3343                 .policy = nl80211_policy,
3344                 /* can be retrieved by unprivileged users */
3345         },
3346         {
3347                 .cmd = NL80211_CMD_SET_INTERFACE,
3348                 .doit = nl80211_set_interface,
3349                 .policy = nl80211_policy,
3350                 .flags = GENL_ADMIN_PERM,
3351         },
3352         {
3353                 .cmd = NL80211_CMD_NEW_INTERFACE,
3354                 .doit = nl80211_new_interface,
3355                 .policy = nl80211_policy,
3356                 .flags = GENL_ADMIN_PERM,
3357         },
3358         {
3359                 .cmd = NL80211_CMD_DEL_INTERFACE,
3360                 .doit = nl80211_del_interface,
3361                 .policy = nl80211_policy,
3362                 .flags = GENL_ADMIN_PERM,
3363         },
3364         {
3365                 .cmd = NL80211_CMD_GET_KEY,
3366                 .doit = nl80211_get_key,
3367                 .policy = nl80211_policy,
3368                 .flags = GENL_ADMIN_PERM,
3369         },
3370         {
3371                 .cmd = NL80211_CMD_SET_KEY,
3372                 .doit = nl80211_set_key,
3373                 .policy = nl80211_policy,
3374                 .flags = GENL_ADMIN_PERM,
3375         },
3376         {
3377                 .cmd = NL80211_CMD_NEW_KEY,
3378                 .doit = nl80211_new_key,
3379                 .policy = nl80211_policy,
3380                 .flags = GENL_ADMIN_PERM,
3381         },
3382         {
3383                 .cmd = NL80211_CMD_DEL_KEY,
3384                 .doit = nl80211_del_key,
3385                 .policy = nl80211_policy,
3386                 .flags = GENL_ADMIN_PERM,
3387         },
3388         {
3389                 .cmd = NL80211_CMD_SET_BEACON,
3390                 .policy = nl80211_policy,
3391                 .flags = GENL_ADMIN_PERM,
3392                 .doit = nl80211_addset_beacon,
3393         },
3394         {
3395                 .cmd = NL80211_CMD_NEW_BEACON,
3396                 .policy = nl80211_policy,
3397                 .flags = GENL_ADMIN_PERM,
3398                 .doit = nl80211_addset_beacon,
3399         },
3400         {
3401                 .cmd = NL80211_CMD_DEL_BEACON,
3402                 .policy = nl80211_policy,
3403                 .flags = GENL_ADMIN_PERM,
3404                 .doit = nl80211_del_beacon,
3405         },
3406         {
3407                 .cmd = NL80211_CMD_GET_STATION,
3408                 .doit = nl80211_get_station,
3409                 .dumpit = nl80211_dump_station,
3410                 .policy = nl80211_policy,
3411         },
3412         {
3413                 .cmd = NL80211_CMD_SET_STATION,
3414                 .doit = nl80211_set_station,
3415                 .policy = nl80211_policy,
3416                 .flags = GENL_ADMIN_PERM,
3417         },
3418         {
3419                 .cmd = NL80211_CMD_NEW_STATION,
3420                 .doit = nl80211_new_station,
3421                 .policy = nl80211_policy,
3422                 .flags = GENL_ADMIN_PERM,
3423         },
3424         {
3425                 .cmd = NL80211_CMD_DEL_STATION,
3426                 .doit = nl80211_del_station,
3427                 .policy = nl80211_policy,
3428                 .flags = GENL_ADMIN_PERM,
3429         },
3430         {
3431                 .cmd = NL80211_CMD_GET_MPATH,
3432                 .doit = nl80211_get_mpath,
3433                 .dumpit = nl80211_dump_mpath,
3434                 .policy = nl80211_policy,
3435                 .flags = GENL_ADMIN_PERM,
3436         },
3437         {
3438                 .cmd = NL80211_CMD_SET_MPATH,
3439                 .doit = nl80211_set_mpath,
3440                 .policy = nl80211_policy,
3441                 .flags = GENL_ADMIN_PERM,
3442         },
3443         {
3444                 .cmd = NL80211_CMD_NEW_MPATH,
3445                 .doit = nl80211_new_mpath,
3446                 .policy = nl80211_policy,
3447                 .flags = GENL_ADMIN_PERM,
3448         },
3449         {
3450                 .cmd = NL80211_CMD_DEL_MPATH,
3451                 .doit = nl80211_del_mpath,
3452                 .policy = nl80211_policy,
3453                 .flags = GENL_ADMIN_PERM,
3454         },
3455         {
3456                 .cmd = NL80211_CMD_SET_BSS,
3457                 .doit = nl80211_set_bss,
3458                 .policy = nl80211_policy,
3459                 .flags = GENL_ADMIN_PERM,
3460         },
3461         {
3462                 .cmd = NL80211_CMD_GET_REG,
3463                 .doit = nl80211_get_reg,
3464                 .policy = nl80211_policy,
3465                 /* can be retrieved by unprivileged users */
3466         },
3467         {
3468                 .cmd = NL80211_CMD_SET_REG,
3469                 .doit = nl80211_set_reg,
3470                 .policy = nl80211_policy,
3471                 .flags = GENL_ADMIN_PERM,
3472         },
3473         {
3474                 .cmd = NL80211_CMD_REQ_SET_REG,
3475                 .doit = nl80211_req_set_reg,
3476                 .policy = nl80211_policy,
3477                 .flags = GENL_ADMIN_PERM,
3478         },
3479         {
3480                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
3481                 .doit = nl80211_get_mesh_params,
3482                 .policy = nl80211_policy,
3483                 /* can be retrieved by unprivileged users */
3484         },
3485         {
3486                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
3487                 .doit = nl80211_set_mesh_params,
3488                 .policy = nl80211_policy,
3489                 .flags = GENL_ADMIN_PERM,
3490         },
3491         {
3492                 .cmd = NL80211_CMD_TRIGGER_SCAN,
3493                 .doit = nl80211_trigger_scan,
3494                 .policy = nl80211_policy,
3495                 .flags = GENL_ADMIN_PERM,
3496         },
3497         {
3498                 .cmd = NL80211_CMD_GET_SCAN,
3499                 .policy = nl80211_policy,
3500                 .dumpit = nl80211_dump_scan,
3501         },
3502         {
3503                 .cmd = NL80211_CMD_AUTHENTICATE,
3504                 .doit = nl80211_authenticate,
3505                 .policy = nl80211_policy,
3506                 .flags = GENL_ADMIN_PERM,
3507         },
3508         {
3509                 .cmd = NL80211_CMD_ASSOCIATE,
3510                 .doit = nl80211_associate,
3511                 .policy = nl80211_policy,
3512                 .flags = GENL_ADMIN_PERM,
3513         },
3514         {
3515                 .cmd = NL80211_CMD_DEAUTHENTICATE,
3516                 .doit = nl80211_deauthenticate,
3517                 .policy = nl80211_policy,
3518                 .flags = GENL_ADMIN_PERM,
3519         },
3520         {
3521                 .cmd = NL80211_CMD_DISASSOCIATE,
3522                 .doit = nl80211_disassociate,
3523                 .policy = nl80211_policy,
3524                 .flags = GENL_ADMIN_PERM,
3525         },
3526         {
3527                 .cmd = NL80211_CMD_JOIN_IBSS,
3528                 .doit = nl80211_join_ibss,
3529                 .policy = nl80211_policy,
3530                 .flags = GENL_ADMIN_PERM,
3531         },
3532         {
3533                 .cmd = NL80211_CMD_LEAVE_IBSS,
3534                 .doit = nl80211_leave_ibss,
3535                 .policy = nl80211_policy,
3536                 .flags = GENL_ADMIN_PERM,
3537         },
3538 };
3539 static struct genl_multicast_group nl80211_mlme_mcgrp = {
3540         .name = "mlme",
3541 };
3542
3543 /* multicast groups */
3544 static struct genl_multicast_group nl80211_config_mcgrp = {
3545         .name = "config",
3546 };
3547 static struct genl_multicast_group nl80211_scan_mcgrp = {
3548         .name = "scan",
3549 };
3550 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
3551         .name = "regulatory",
3552 };
3553
3554 /* notification functions */
3555
3556 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
3557 {
3558         struct sk_buff *msg;
3559
3560         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3561         if (!msg)
3562                 return;
3563
3564         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
3565                 nlmsg_free(msg);
3566                 return;
3567         }
3568
3569         genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
3570 }
3571
3572 static int nl80211_add_scan_req(struct sk_buff *msg,
3573                                 struct cfg80211_registered_device *rdev)
3574 {
3575         struct cfg80211_scan_request *req = rdev->scan_req;
3576         struct nlattr *nest;
3577         int i;
3578
3579         if (WARN_ON(!req))
3580                 return 0;
3581
3582         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
3583         if (!nest)
3584                 goto nla_put_failure;
3585         for (i = 0; i < req->n_ssids; i++)
3586                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
3587         nla_nest_end(msg, nest);
3588
3589         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
3590         if (!nest)
3591                 goto nla_put_failure;
3592         for (i = 0; i < req->n_channels; i++)
3593                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
3594         nla_nest_end(msg, nest);
3595
3596         if (req->ie)
3597                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
3598
3599         return 0;
3600  nla_put_failure:
3601         return -ENOBUFS;
3602 }
3603
3604 static int nl80211_send_scan_donemsg(struct sk_buff *msg,
3605                                      struct cfg80211_registered_device *rdev,
3606                                      struct net_device *netdev,
3607                                      u32 pid, u32 seq, int flags,
3608                                      u32 cmd)
3609 {
3610         void *hdr;
3611
3612         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
3613         if (!hdr)
3614                 return -1;
3615
3616         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3617         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3618
3619         /* ignore errors and send incomplete event anyway */
3620         nl80211_add_scan_req(msg, rdev);
3621
3622         return genlmsg_end(msg, hdr);
3623
3624  nla_put_failure:
3625         genlmsg_cancel(msg, hdr);
3626         return -EMSGSIZE;
3627 }
3628
3629 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
3630                             struct net_device *netdev)
3631 {
3632         struct sk_buff *msg;
3633
3634         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3635         if (!msg)
3636                 return;
3637
3638         if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3639                                       NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
3640                 nlmsg_free(msg);
3641                 return;
3642         }
3643
3644         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3645 }
3646
3647 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
3648                                struct net_device *netdev)
3649 {
3650         struct sk_buff *msg;
3651
3652         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3653         if (!msg)
3654                 return;
3655
3656         if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
3657                                       NL80211_CMD_SCAN_ABORTED) < 0) {
3658                 nlmsg_free(msg);
3659                 return;
3660         }
3661
3662         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
3663 }
3664
3665 /*
3666  * This can happen on global regulatory changes or device specific settings
3667  * based on custom world regulatory domains.
3668  */
3669 void nl80211_send_reg_change_event(struct regulatory_request *request)
3670 {
3671         struct sk_buff *msg;
3672         void *hdr;
3673
3674         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3675         if (!msg)
3676                 return;
3677
3678         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
3679         if (!hdr) {
3680                 nlmsg_free(msg);
3681                 return;
3682         }
3683
3684         /* Userspace can always count this one always being set */
3685         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
3686
3687         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
3688                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3689                            NL80211_REGDOM_TYPE_WORLD);
3690         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
3691                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3692                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
3693         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
3694                  request->intersect)
3695                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3696                            NL80211_REGDOM_TYPE_INTERSECTION);
3697         else {
3698                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
3699                            NL80211_REGDOM_TYPE_COUNTRY);
3700                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
3701         }
3702
3703         if (wiphy_idx_valid(request->wiphy_idx))
3704                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
3705
3706         if (genlmsg_end(msg, hdr) < 0) {
3707                 nlmsg_free(msg);
3708                 return;
3709         }
3710
3711         genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
3712
3713         return;
3714
3715 nla_put_failure:
3716         genlmsg_cancel(msg, hdr);
3717         nlmsg_free(msg);
3718 }
3719
3720 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
3721                                     struct net_device *netdev,
3722                                     const u8 *buf, size_t len,
3723                                     enum nl80211_commands cmd)
3724 {
3725         struct sk_buff *msg;
3726         void *hdr;
3727
3728         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3729         if (!msg)
3730                 return;
3731
3732         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3733         if (!hdr) {
3734                 nlmsg_free(msg);
3735                 return;
3736         }
3737
3738         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3739         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3740         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
3741
3742         if (genlmsg_end(msg, hdr) < 0) {
3743                 nlmsg_free(msg);
3744                 return;
3745         }
3746
3747         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3748         return;
3749
3750  nla_put_failure:
3751         genlmsg_cancel(msg, hdr);
3752         nlmsg_free(msg);
3753 }
3754
3755 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
3756                           struct net_device *netdev, const u8 *buf, size_t len)
3757 {
3758         nl80211_send_mlme_event(rdev, netdev, buf, len,
3759                                 NL80211_CMD_AUTHENTICATE);
3760 }
3761
3762 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
3763                            struct net_device *netdev, const u8 *buf,
3764                            size_t len)
3765 {
3766         nl80211_send_mlme_event(rdev, netdev, buf, len, NL80211_CMD_ASSOCIATE);
3767 }
3768
3769 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
3770                          struct net_device *netdev, const u8 *buf, size_t len)
3771 {
3772         nl80211_send_mlme_event(rdev, netdev, buf, len,
3773                                 NL80211_CMD_DEAUTHENTICATE);
3774 }
3775
3776 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
3777                            struct net_device *netdev, const u8 *buf,
3778                            size_t len)
3779 {
3780         nl80211_send_mlme_event(rdev, netdev, buf, len,
3781                                 NL80211_CMD_DISASSOCIATE);
3782 }
3783
3784 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
3785                                       struct net_device *netdev, int cmd,
3786                                       const u8 *addr)
3787 {
3788         struct sk_buff *msg;
3789         void *hdr;
3790
3791         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3792         if (!msg)
3793                 return;
3794
3795         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
3796         if (!hdr) {
3797                 nlmsg_free(msg);
3798                 return;
3799         }
3800
3801         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3802         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3803         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
3804         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3805
3806         if (genlmsg_end(msg, hdr) < 0) {
3807                 nlmsg_free(msg);
3808                 return;
3809         }
3810
3811         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3812         return;
3813
3814  nla_put_failure:
3815         genlmsg_cancel(msg, hdr);
3816         nlmsg_free(msg);
3817 }
3818
3819 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
3820                                struct net_device *netdev, const u8 *addr)
3821 {
3822         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
3823                                   addr);
3824 }
3825
3826 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
3827                                 struct net_device *netdev, const u8 *addr)
3828 {
3829         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE, addr);
3830 }
3831
3832 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
3833                              struct net_device *netdev, const u8 *bssid,
3834                              gfp_t gfp)
3835 {
3836         struct sk_buff *msg;
3837         void *hdr;
3838
3839         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
3840         if (!msg)
3841                 return;
3842
3843         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
3844         if (!hdr) {
3845                 nlmsg_free(msg);
3846                 return;
3847         }
3848
3849         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3850         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3851         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
3852
3853         if (genlmsg_end(msg, hdr) < 0) {
3854                 nlmsg_free(msg);
3855                 return;
3856         }
3857
3858         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
3859         return;
3860
3861  nla_put_failure:
3862         genlmsg_cancel(msg, hdr);
3863         nlmsg_free(msg);
3864 }
3865
3866 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
3867                                  struct net_device *netdev, const u8 *addr,
3868                                  enum nl80211_key_type key_type, int key_id,
3869                                  const u8 *tsc)
3870 {
3871         struct sk_buff *msg;
3872         void *hdr;
3873
3874         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3875         if (!msg)
3876                 return;
3877
3878         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
3879         if (!hdr) {
3880                 nlmsg_free(msg);
3881                 return;
3882         }
3883
3884         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3885         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
3886         if (addr)
3887                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3888         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
3889         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
3890         if (tsc)
3891                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
3892
3893         if (genlmsg_end(msg, hdr) < 0) {
3894                 nlmsg_free(msg);
3895                 return;
3896         }
3897
3898         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_ATOMIC);
3899         return;
3900
3901  nla_put_failure:
3902         genlmsg_cancel(msg, hdr);
3903         nlmsg_free(msg);
3904 }
3905
3906 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
3907                                     struct ieee80211_channel *channel_before,
3908                                     struct ieee80211_channel *channel_after)
3909 {
3910         struct sk_buff *msg;
3911         void *hdr;
3912         struct nlattr *nl_freq;
3913
3914         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
3915         if (!msg)
3916                 return;
3917
3918         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
3919         if (!hdr) {
3920                 nlmsg_free(msg);
3921                 return;
3922         }
3923
3924         /*
3925          * Since we are applying the beacon hint to a wiphy we know its
3926          * wiphy_idx is valid
3927          */
3928         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
3929
3930         /* Before */
3931         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
3932         if (!nl_freq)
3933                 goto nla_put_failure;
3934         if (nl80211_msg_put_channel(msg, channel_before))
3935                 goto nla_put_failure;
3936         nla_nest_end(msg, nl_freq);
3937
3938         /* After */
3939         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
3940         if (!nl_freq)
3941                 goto nla_put_failure;
3942         if (nl80211_msg_put_channel(msg, channel_after))
3943                 goto nla_put_failure;
3944         nla_nest_end(msg, nl_freq);
3945
3946         if (genlmsg_end(msg, hdr) < 0) {
3947                 nlmsg_free(msg);
3948                 return;
3949         }
3950
3951         genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
3952
3953         return;
3954
3955 nla_put_failure:
3956         genlmsg_cancel(msg, hdr);
3957         nlmsg_free(msg);
3958 }
3959
3960 /* initialisation/exit functions */
3961
3962 int nl80211_init(void)
3963 {
3964         int err;
3965
3966         err = genl_register_family_with_ops(&nl80211_fam,
3967                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
3968         if (err)
3969                 return err;
3970
3971         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
3972         if (err)
3973                 goto err_out;
3974
3975         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
3976         if (err)
3977                 goto err_out;
3978
3979         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
3980         if (err)
3981                 goto err_out;
3982
3983         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
3984         if (err)
3985                 goto err_out;
3986
3987         return 0;
3988  err_out:
3989         genl_unregister_family(&nl80211_fam);
3990         return err;
3991 }
3992
3993 void nl80211_exit(void)
3994 {
3995         genl_unregister_family(&nl80211_fam);
3996 }