net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2009  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/list.h>
  11 #include <linux/if_ether.h>
  12 #include <linux/ieee80211.h>
  13 #include <linux/nl80211.h>
  14 #include <linux/rtnetlink.h>
  15 #include <linux/netlink.h>
  16 #include <linux/etherdevice.h>
  17 #include <net/net_namespace.h>
  18 #include <net/genetlink.h>
  19 #include <net/cfg80211.h>
  20 #include <net/sock.h>
  21 #include "core.h"
  22 #include "nl80211.h"
  23 #include "reg.h"
  24
  25 /* the netlink family */
  26 static struct genl_family nl80211_fam = {
  27         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  28         .name = "nl80211",      /* have users key off the name instead */
  29         .hdrsize = 0,           /* no private header */
  30         .version = 1,           /* no particular meaning now */
  31         .maxattr = NL80211_ATTR_MAX,
  32         .netnsok = true,
  33 };
  34
  35 /* internal helper: get rdev and dev */
  36 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  37                                        struct cfg80211_registered_device **rdev,
  38                                        struct net_device **dev)
  39 {
  40         struct nlattr **attrs = info->attrs;
  41         int ifindex;
  42
  43         if (!attrs[NL80211_ATTR_IFINDEX])
  44                 return -EINVAL;
  45
  46         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  47         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  48         if (!*dev)
  49                 return -ENODEV;
  50
  51         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  52         if (IS_ERR(*rdev)) {
  53                 dev_put(*dev);
  54                 return PTR_ERR(*rdev);
  55         }
  56
  57         return 0;
  58 }
  59
  60 /* policy for the attributes */
  61 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
  62         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  63         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  64                                       .len = 20-1 },
  65         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  66         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  67         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  69         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  72         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  73
  74         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  75         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  76         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  77
  78         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  79         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  80
  81         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  82         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  83                                     .len = WLAN_MAX_KEY_LEN },
  84         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  85         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  86         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  87         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  88
  89         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  90         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  91         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  92                                        .len = IEEE80211_MAX_DATA_LEN },
  93         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  94                                        .len = IEEE80211_MAX_DATA_LEN },
  95         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  96         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  97         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  98         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  99                                                .len = NL80211_MAX_SUPP_RATES },
 100         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 101         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 102         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 103         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 104                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 105         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 106
 107         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 108         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 109
 110         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 111         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 113         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 114                                            .len = NL80211_MAX_SUPP_RATES },
 115
 116         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 117
 118         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 119                                          .len = NL80211_HT_CAPABILITY_LEN },
 120
 121         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 122         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 123                               .len = IEEE80211_MAX_DATA_LEN },
 124         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 125         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 126
 127         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 128                                 .len = IEEE80211_MAX_SSID_LEN },
 129         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 130         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 131         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 132         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 134         [NL80211_ATTR_STA_FLAGS2] = {
 135                 .len = sizeof(struct nl80211_sta_flag_update),
 136         },
 137         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 138         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 139         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 140         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 141         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 142         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 143         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 144                                  .len = WLAN_PMKID_LEN },
 145         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 146         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 147         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 148 };
 149
 150 /* policy for the attributes */
 151 static struct nla_policy
 152 nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
 153         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 154         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 155         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 156         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 157         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 158         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 159 };
 160
 161 /* ifidx get helper */
 162 static int nl80211_get_ifidx(struct netlink_callback *cb)
 163 {
 164         int res;
 165
 166         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 167                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 168                           nl80211_policy);
 169         if (res)
 170                 return res;
 171
 172         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 173                 return -EINVAL;
 174
 175         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 176         if (!res)
 177                 return -EINVAL;
 178         return res;
 179 }
 180
 181 /* IE validation */
 182 static bool is_valid_ie_attr(const struct nlattr *attr)
 183 {
 184         const u8 *pos;
 185         int len;
 186
 187         if (!attr)
 188                 return true;
 189
 190         pos = nla_data(attr);
 191         len = nla_len(attr);
 192
 193         while (len) {
 194                 u8 elemlen;
 195
 196                 if (len < 2)
 197                         return false;
 198                 len -= 2;
 199
 200                 elemlen = pos[1];
 201                 if (elemlen > len)
 202                         return false;
 203
 204                 len -= elemlen;
 205                 pos += 2 + elemlen;
 206         }
 207
 208         return true;
 209 }
 210
 211 /* message building helper */
 212 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 213                                    int flags, u8 cmd)
 214 {
 215         /* since there is no private header just add the generic one */
 216         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 217 }
 218
 219 static int nl80211_msg_put_channel(struct sk_buff *msg,
 220                                    struct ieee80211_channel *chan)
 221 {
 222         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 223                     chan->center_freq);
 224
 225         if (chan->flags & IEEE80211_CHAN_DISABLED)
 226                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 227         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 228                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 229         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 230                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 231         if (chan->flags & IEEE80211_CHAN_RADAR)
 232                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 233
 234         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 235                     DBM_TO_MBM(chan->max_power));
 236
 237         return 0;
 238
 239  nla_put_failure:
 240         return -ENOBUFS;
 241 }
 242
 243 /* netlink command implementations */
 244
 245 struct key_parse {
 246         struct key_params p;
 247         int idx;
 248         bool def, defmgmt;
 249 };
 250
 251 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 252 {
 253         struct nlattr *tb[NL80211_KEY_MAX + 1];
 254         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 255                                    nl80211_key_policy);
 256         if (err)
 257                 return err;
 258
 259         k->def = !!tb[NL80211_KEY_DEFAULT];
 260         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 261
 262         if (tb[NL80211_KEY_IDX])
 263                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 264
 265         if (tb[NL80211_KEY_DATA]) {
 266                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 267                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 268         }
 269
 270         if (tb[NL80211_KEY_SEQ]) {
 271                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 272                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 273         }
 274
 275         if (tb[NL80211_KEY_CIPHER])
 276                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 277
 278         return 0;
 279 }
 280
 281 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 282 {
 283         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 284                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 285                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 286         }
 287
 288         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 289                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 290                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 291         }
 292
 293         if (info->attrs[NL80211_ATTR_KEY_IDX])
 294                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 295
 296         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 297                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 298
 299         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 300         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 301
 302         return 0;
 303 }
 304
 305 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 306 {
 307         int err;
 308
 309         memset(k, 0, sizeof(*k));
 310         k->idx = -1;
 311
 312         if (info->attrs[NL80211_ATTR_KEY])
 313                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 314         else
 315                 err = nl80211_parse_key_old(info, k);
 316
 317         if (err)
 318                 return err;
 319
 320         if (k->def && k->defmgmt)
 321                 return -EINVAL;
 322
 323         if (k->idx != -1) {
 324                 if (k->defmgmt) {
 325                         if (k->idx < 4 || k->idx > 5)
 326                                 return -EINVAL;
 327                 } else if (k->def) {
 328                         if (k->idx < 0 || k->idx > 3)
 329                                 return -EINVAL;
 330                 } else {
 331                         if (k->idx < 0 || k->idx > 5)
 332                                 return -EINVAL;
 333                 }
 334         }
 335
 336         return 0;
 337 }
 338
 339 static struct cfg80211_cached_keys *
 340 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 341                        struct nlattr *keys)
 342 {
 343         struct key_parse parse;
 344         struct nlattr *key;
 345         struct cfg80211_cached_keys *result;
 346         int rem, err, def = 0;
 347
 348         result = kzalloc(sizeof(*result), GFP_KERNEL);
 349         if (!result)
 350                 return ERR_PTR(-ENOMEM);
 351
 352         result->def = -1;
 353         result->defmgmt = -1;
 354
 355         nla_for_each_nested(key, keys, rem) {
 356                 memset(&parse, 0, sizeof(parse));
 357                 parse.idx = -1;
 358
 359                 err = nl80211_parse_key_new(key, &parse);
 360                 if (err)
 361                         goto error;
 362                 err = -EINVAL;
 363                 if (!parse.p.key)
 364                         goto error;
 365                 if (parse.idx < 0 || parse.idx > 4)
 366                         goto error;
 367                 if (parse.def) {
 368                         if (def)
 369                                 goto error;
 370                         def = 1;
 371                         result->def = parse.idx;
 372                 } else if (parse.defmgmt)
 373                         goto error;
 374                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 375                                                      parse.idx, NULL);
 376                 if (err)
 377                         goto error;
 378                 result->params[parse.idx].cipher = parse.p.cipher;
 379                 result->params[parse.idx].key_len = parse.p.key_len;
 380                 result->params[parse.idx].key = result->data[parse.idx];
 381                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 382         }
 383
 384         return result;
 385  error:
 386         kfree(result);
 387         return ERR_PTR(err);
 388 }
 389
 390 static int nl80211_key_allowed(struct wireless_dev *wdev)
 391 {
 392         ASSERT_WDEV_LOCK(wdev);
 393
 394         if (!netif_running(wdev->netdev))
 395                 return -ENETDOWN;
 396
 397         switch (wdev->iftype) {
 398         case NL80211_IFTYPE_AP:
 399         case NL80211_IFTYPE_AP_VLAN:
 400                 break;
 401         case NL80211_IFTYPE_ADHOC:
 402                 if (!wdev->current_bss)
 403                         return -ENOLINK;
 404                 break;
 405         case NL80211_IFTYPE_STATION:
 406                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 407                         return -ENOLINK;
 408                 break;
 409         default:
 410                 return -EINVAL;
 411         }
 412
 413         return 0;
 414 }
 415
 416 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 417                               struct cfg80211_registered_device *dev)
 418 {
 419         void *hdr;
 420         struct nlattr *nl_bands, *nl_band;
 421         struct nlattr *nl_freqs, *nl_freq;
 422         struct nlattr *nl_rates, *nl_rate;
 423         struct nlattr *nl_modes;
 424         struct nlattr *nl_cmds;
 425         enum ieee80211_band band;
 426         struct ieee80211_channel *chan;
 427         struct ieee80211_rate *rate;
 428         int i;
 429         u16 ifmodes = dev->wiphy.interface_modes;
 430
 431         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 432         if (!hdr)
 433                 return -1;
 434
 435         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 436         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 437
 438         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 439                     cfg80211_rdev_list_generation);
 440
 441         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 442                    dev->wiphy.retry_short);
 443         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 444                    dev->wiphy.retry_long);
 445         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 446                     dev->wiphy.frag_threshold);
 447         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 448                     dev->wiphy.rts_threshold);
 449         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 450                     dev->wiphy.coverage_class);
 451
 452         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 453                    dev->wiphy.max_scan_ssids);
 454         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 455                     dev->wiphy.max_scan_ie_len);
 456
 457         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 458                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 459                 dev->wiphy.cipher_suites);
 460
 461         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 462                    dev->wiphy.max_num_pmkids);
 463
 464         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 465         if (!nl_modes)
 466                 goto nla_put_failure;
 467
 468         i = 0;
 469         while (ifmodes) {
 470                 if (ifmodes & 1)
 471                         NLA_PUT_FLAG(msg, i);
 472                 ifmodes >>= 1;
 473                 i++;
 474         }
 475
 476         nla_nest_end(msg, nl_modes);
 477
 478         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 479         if (!nl_bands)
 480                 goto nla_put_failure;
 481
 482         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 483                 if (!dev->wiphy.bands[band])
 484                         continue;
 485
 486                 nl_band = nla_nest_start(msg, band);
 487                 if (!nl_band)
 488                         goto nla_put_failure;
 489
 490                 /* add HT info */
 491                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 492                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 493                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 494                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 495                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 496                                 dev->wiphy.bands[band]->ht_cap.cap);
 497                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 498                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 499                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 500                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 501                 }
 502
 503                 /* add frequencies */
 504                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 505                 if (!nl_freqs)
 506                         goto nla_put_failure;
 507
 508                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 509                         nl_freq = nla_nest_start(msg, i);
 510                         if (!nl_freq)
 511                                 goto nla_put_failure;
 512
 513                         chan = &dev->wiphy.bands[band]->channels[i];
 514
 515                         if (nl80211_msg_put_channel(msg, chan))
 516                                 goto nla_put_failure;
 517
 518                         nla_nest_end(msg, nl_freq);
 519                 }
 520
 521                 nla_nest_end(msg, nl_freqs);
 522
 523                 /* add bitrates */
 524                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 525                 if (!nl_rates)
 526                         goto nla_put_failure;
 527
 528                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 529                         nl_rate = nla_nest_start(msg, i);
 530                         if (!nl_rate)
 531                                 goto nla_put_failure;
 532
 533                         rate = &dev->wiphy.bands[band]->bitrates[i];
 534                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 535                                     rate->bitrate);
 536                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 537                                 NLA_PUT_FLAG(msg,
 538                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 539
 540                         nla_nest_end(msg, nl_rate);
 541                 }
 542
 543                 nla_nest_end(msg, nl_rates);
 544
 545                 nla_nest_end(msg, nl_band);
 546         }
 547         nla_nest_end(msg, nl_bands);
 548
 549         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 550         if (!nl_cmds)
 551                 goto nla_put_failure;
 552
 553         i = 0;
 554 #define CMD(op, n)                                              \
 555          do {                                                   \
 556                 if (dev->ops->op) {                             \
 557                         i++;                                    \
 558                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 559                 }                                               \
 560         } while (0)
 561
 562         CMD(add_virtual_intf, NEW_INTERFACE);
 563         CMD(change_virtual_intf, SET_INTERFACE);
 564         CMD(add_key, NEW_KEY);
 565         CMD(add_beacon, NEW_BEACON);
 566         CMD(add_station, NEW_STATION);
 567         CMD(add_mpath, NEW_MPATH);
 568         CMD(set_mesh_params, SET_MESH_PARAMS);
 569         CMD(change_bss, SET_BSS);
 570         CMD(auth, AUTHENTICATE);
 571         CMD(assoc, ASSOCIATE);
 572         CMD(deauth, DEAUTHENTICATE);
 573         CMD(disassoc, DISASSOCIATE);
 574         CMD(join_ibss, JOIN_IBSS);
 575         CMD(set_pmksa, SET_PMKSA);
 576         CMD(del_pmksa, DEL_PMKSA);
 577         CMD(flush_pmksa, FLUSH_PMKSA);
 578         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 579         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 580         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 581                 i++;
 582                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 583         }
 584
 585 #undef CMD
 586
 587         if (dev->ops->connect || dev->ops->auth) {
 588                 i++;
 589                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 590         }
 591
 592         if (dev->ops->disconnect || dev->ops->deauth) {
 593                 i++;
 594                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 595         }
 596
 597         nla_nest_end(msg, nl_cmds);
 598
 599         return genlmsg_end(msg, hdr);
 600
 601  nla_put_failure:
 602         genlmsg_cancel(msg, hdr);
 603         return -EMSGSIZE;
 604 }
 605
 606 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 607 {
 608         int idx = 0;
 609         int start = cb->args[0];
 610         struct cfg80211_registered_device *dev;
 611
 612         mutex_lock(&cfg80211_mutex);
 613         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 614                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 615                         continue;
 616                 if (++idx <= start)
 617                         continue;
 618                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 619                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 620                                        dev) < 0) {
 621                         idx--;
 622                         break;
 623                 }
 624         }
 625         mutex_unlock(&cfg80211_mutex);
 626
 627         cb->args[0] = idx;
 628
 629         return skb->len;
 630 }
 631
 632 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 633 {
 634         struct sk_buff *msg;
 635         struct cfg80211_registered_device *dev;
 636
 637         dev = cfg80211_get_dev_from_info(info);
 638         if (IS_ERR(dev))
 639                 return PTR_ERR(dev);
 640
 641         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 642         if (!msg)
 643                 goto out_err;
 644
 645         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 646                 goto out_free;
 647
 648         cfg80211_unlock_rdev(dev);
 649
 650         return genlmsg_reply(msg, info);
 651
 652  out_free:
 653         nlmsg_free(msg);
 654  out_err:
 655         cfg80211_unlock_rdev(dev);
 656         return -ENOBUFS;
 657 }
 658
 659 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 660         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 661         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 662         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 663         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 664         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 665 };
 666
 667 static int parse_txq_params(struct nlattr *tb[],
 668                             struct ieee80211_txq_params *txq_params)
 669 {
 670         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 671             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 672             !tb[NL80211_TXQ_ATTR_AIFS])
 673                 return -EINVAL;
 674
 675         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 676         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 677         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 678         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 679         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 680
 681         return 0;
 682 }
 683
 684 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 685 {
 686         struct cfg80211_registered_device *rdev;
 687         int result = 0, rem_txq_params = 0;
 688         struct nlattr *nl_txq_params;
 689         u32 changed;
 690         u8 retry_short = 0, retry_long = 0;
 691         u32 frag_threshold = 0, rts_threshold = 0;
 692         u8 coverage_class = 0;
 693
 694         rtnl_lock();
 695
 696         mutex_lock(&cfg80211_mutex);
 697
 698         rdev = __cfg80211_rdev_from_info(info);
 699         if (IS_ERR(rdev)) {
 700                 mutex_unlock(&cfg80211_mutex);
 701                 result = PTR_ERR(rdev);
 702                 goto unlock;
 703         }
 704
 705         mutex_lock(&rdev->mtx);
 706
 707         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 708                 result = cfg80211_dev_rename(
 709                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 710
 711         mutex_unlock(&cfg80211_mutex);
 712
 713         if (result)
 714                 goto bad_res;
 715
 716         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 717                 struct ieee80211_txq_params txq_params;
 718                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 719
 720                 if (!rdev->ops->set_txq_params) {
 721                         result = -EOPNOTSUPP;
 722                         goto bad_res;
 723                 }
 724
 725                 nla_for_each_nested(nl_txq_params,
 726                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 727                                     rem_txq_params) {
 728                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 729                                   nla_data(nl_txq_params),
 730                                   nla_len(nl_txq_params),
 731                                   txq_params_policy);
 732                         result = parse_txq_params(tb, &txq_params);
 733                         if (result)
 734                                 goto bad_res;
 735
 736                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 737                                                            &txq_params);
 738                         if (result)
 739                                 goto bad_res;
 740                 }
 741         }
 742
 743         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 744                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 745                 u32 freq;
 746
 747                 result = -EINVAL;
 748
 749                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 750                         channel_type = nla_get_u32(info->attrs[
 751                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 752                         if (channel_type != NL80211_CHAN_NO_HT &&
 753                             channel_type != NL80211_CHAN_HT20 &&
 754                             channel_type != NL80211_CHAN_HT40PLUS &&
 755                             channel_type != NL80211_CHAN_HT40MINUS)
 756                                 goto bad_res;
 757                 }
 758
 759                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 760
 761                 mutex_lock(&rdev->devlist_mtx);
 762                 result = rdev_set_freq(rdev, NULL, freq, channel_type);
 763                 mutex_unlock(&rdev->devlist_mtx);
 764                 if (result)
 765                         goto bad_res;
 766         }
 767
 768         changed = 0;
 769
 770         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 771                 retry_short = nla_get_u8(
 772                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 773                 if (retry_short == 0) {
 774                         result = -EINVAL;
 775                         goto bad_res;
 776                 }
 777                 changed |= WIPHY_PARAM_RETRY_SHORT;
 778         }
 779
 780         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 781                 retry_long = nla_get_u8(
 782                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 783                 if (retry_long == 0) {
 784                         result = -EINVAL;
 785                         goto bad_res;
 786                 }
 787                 changed |= WIPHY_PARAM_RETRY_LONG;
 788         }
 789
 790         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 791                 frag_threshold = nla_get_u32(
 792                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 793                 if (frag_threshold < 256) {
 794                         result = -EINVAL;
 795                         goto bad_res;
 796                 }
 797                 if (frag_threshold != (u32) -1) {
 798                         /*
 799                          * Fragments (apart from the last one) are required to
 800                          * have even length. Make the fragmentation code
 801                          * simpler by stripping LSB should someone try to use
 802                          * odd threshold value.
 803                          */
 804                         frag_threshold &= ~0x1;
 805                 }
 806                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 807         }
 808
 809         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 810                 rts_threshold = nla_get_u32(
 811                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 812                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 813         }
 814
 815         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 816                 coverage_class = nla_get_u8(
 817                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 818                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
 819         }
 820
 821         if (changed) {
 822                 u8 old_retry_short, old_retry_long;
 823                 u32 old_frag_threshold, old_rts_threshold;
 824                 u8 old_coverage_class;
 825
 826                 if (!rdev->ops->set_wiphy_params) {
 827                         result = -EOPNOTSUPP;
 828                         goto bad_res;
 829                 }
 830
 831                 old_retry_short = rdev->wiphy.retry_short;
 832                 old_retry_long = rdev->wiphy.retry_long;
 833                 old_frag_threshold = rdev->wiphy.frag_threshold;
 834                 old_rts_threshold = rdev->wiphy.rts_threshold;
 835                 old_coverage_class = rdev->wiphy.coverage_class;
 836
 837                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 838                         rdev->wiphy.retry_short = retry_short;
 839                 if (changed & WIPHY_PARAM_RETRY_LONG)
 840                         rdev->wiphy.retry_long = retry_long;
 841                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 842                         rdev->wiphy.frag_threshold = frag_threshold;
 843                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 844                         rdev->wiphy.rts_threshold = rts_threshold;
 845                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
 846                         rdev->wiphy.coverage_class = coverage_class;
 847
 848                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 849                 if (result) {
 850                         rdev->wiphy.retry_short = old_retry_short;
 851                         rdev->wiphy.retry_long = old_retry_long;
 852                         rdev->wiphy.frag_threshold = old_frag_threshold;
 853                         rdev->wiphy.rts_threshold = old_rts_threshold;
 854                         rdev->wiphy.coverage_class = old_coverage_class;
 855                 }
 856         }
 857
 858  bad_res:
 859         mutex_unlock(&rdev->mtx);
 860  unlock:
 861         rtnl_unlock();
 862         return result;
 863 }
 864
 865
 866 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 867                               struct cfg80211_registered_device *rdev,
 868                               struct net_device *dev)
 869 {
 870         void *hdr;
 871
 872         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 873         if (!hdr)
 874                 return -1;
 875
 876         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 877         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 878         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 879         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 880
 881         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 882                     rdev->devlist_generation ^
 883                         (cfg80211_rdev_list_generation << 2));
 884
 885         return genlmsg_end(msg, hdr);
 886
 887  nla_put_failure:
 888         genlmsg_cancel(msg, hdr);
 889         return -EMSGSIZE;
 890 }
 891
 892 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 893 {
 894         int wp_idx = 0;
 895         int if_idx = 0;
 896         int wp_start = cb->args[0];
 897         int if_start = cb->args[1];
 898         struct cfg80211_registered_device *rdev;
 899         struct wireless_dev *wdev;
 900
 901         mutex_lock(&cfg80211_mutex);
 902         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
 903                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
 904                         continue;
 905                 if (wp_idx < wp_start) {
 906                         wp_idx++;
 907                         continue;
 908                 }
 909                 if_idx = 0;
 910
 911                 mutex_lock(&rdev->devlist_mtx);
 912                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
 913                         if (if_idx < if_start) {
 914                                 if_idx++;
 915                                 continue;
 916                         }
 917                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 918                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 919                                                rdev, wdev->netdev) < 0) {
 920                                 mutex_unlock(&rdev->devlist_mtx);
 921                                 goto out;
 922                         }
 923                         if_idx++;
 924                 }
 925                 mutex_unlock(&rdev->devlist_mtx);
 926
 927                 wp_idx++;
 928         }
 929  out:
 930         mutex_unlock(&cfg80211_mutex);
 931
 932         cb->args[0] = wp_idx;
 933         cb->args[1] = if_idx;
 934
 935         return skb->len;
 936 }
 937
 938 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 939 {
 940         struct sk_buff *msg;
 941         struct cfg80211_registered_device *dev;
 942         struct net_device *netdev;
 943         int err;
 944
 945         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
 946         if (err)
 947                 return err;
 948
 949         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 950         if (!msg)
 951                 goto out_err;
 952
 953         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
 954                                dev, netdev) < 0)
 955                 goto out_free;
 956
 957         dev_put(netdev);
 958         cfg80211_unlock_rdev(dev);
 959
 960         return genlmsg_reply(msg, info);
 961
 962  out_free:
 963         nlmsg_free(msg);
 964  out_err:
 965         dev_put(netdev);
 966         cfg80211_unlock_rdev(dev);
 967         return -ENOBUFS;
 968 }
 969
 970 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 971         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 972         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 973         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 974         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 975         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 976 };
 977
 978 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 979 {
 980         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 981         int flag;
 982
 983         *mntrflags = 0;
 984
 985         if (!nla)
 986                 return -EINVAL;
 987
 988         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 989                              nla, mntr_flags_policy))
 990                 return -EINVAL;
 991
 992         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 993                 if (flags[flag])
 994                         *mntrflags |= (1<<flag);
 995
 996         return 0;
 997 }
 998
 999 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1000                                struct net_device *netdev, u8 use_4addr,
1001                                enum nl80211_iftype iftype)
1002 {
1003         if (!use_4addr) {
1004                 if (netdev && netdev->br_port)
1005                         return -EBUSY;
1006                 return 0;
1007         }
1008
1009         switch (iftype) {
1010         case NL80211_IFTYPE_AP_VLAN:
1011                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1012                         return 0;
1013                 break;
1014         case NL80211_IFTYPE_STATION:
1015                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1016                         return 0;
1017                 break;
1018         default:
1019                 break;
1020         }
1021
1022         return -EOPNOTSUPP;
1023 }
1024
1025 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1026 {
1027         struct cfg80211_registered_device *rdev;
1028         struct vif_params params;
1029         int err;
1030         enum nl80211_iftype otype, ntype;
1031         struct net_device *dev;
1032         u32 _flags, *flags = NULL;
1033         bool change = false;
1034
1035         memset(&params, 0, sizeof(params));
1036
1037         rtnl_lock();
1038
1039         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1040         if (err)
1041                 goto unlock_rtnl;
1042
1043         otype = ntype = dev->ieee80211_ptr->iftype;
1044
1045         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1046                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1047                 if (otype != ntype)
1048                         change = true;
1049                 if (ntype > NL80211_IFTYPE_MAX) {
1050                         err = -EINVAL;
1051                         goto unlock;
1052                 }
1053         }
1054
1055         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1056                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1057                         err = -EINVAL;
1058                         goto unlock;
1059                 }
1060                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1061                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1062                 change = true;
1063         }
1064
1065         if (info->attrs[NL80211_ATTR_4ADDR]) {
1066                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1067                 change = true;
1068                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1069                 if (err)
1070                         goto unlock;
1071         } else {
1072                 params.use_4addr = -1;
1073         }
1074
1075         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1076                 if (ntype != NL80211_IFTYPE_MONITOR) {
1077                         err = -EINVAL;
1078                         goto unlock;
1079                 }
1080                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1081                                           &_flags);
1082                 if (err)
1083                         goto unlock;
1084
1085                 flags = &_flags;
1086                 change = true;
1087         }
1088
1089         if (change)
1090                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1091         else
1092                 err = 0;
1093
1094         if (!err && params.use_4addr != -1)
1095                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1096
1097  unlock:
1098         dev_put(dev);
1099         cfg80211_unlock_rdev(rdev);
1100  unlock_rtnl:
1101         rtnl_unlock();
1102         return err;
1103 }
1104
1105 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1106 {
1107         struct cfg80211_registered_device *rdev;
1108         struct vif_params params;
1109         int err;
1110         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1111         u32 flags;
1112
1113         memset(&params, 0, sizeof(params));
1114
1115         if (!info->attrs[NL80211_ATTR_IFNAME])
1116                 return -EINVAL;
1117
1118         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1119                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1120                 if (type > NL80211_IFTYPE_MAX)
1121                         return -EINVAL;
1122         }
1123
1124         rtnl_lock();
1125
1126         rdev = cfg80211_get_dev_from_info(info);
1127         if (IS_ERR(rdev)) {
1128                 err = PTR_ERR(rdev);
1129                 goto unlock_rtnl;
1130         }
1131
1132         if (!rdev->ops->add_virtual_intf ||
1133             !(rdev->wiphy.interface_modes & (1 << type))) {
1134                 err = -EOPNOTSUPP;
1135                 goto unlock;
1136         }
1137
1138         if (type == NL80211_IFTYPE_MESH_POINT &&
1139             info->attrs[NL80211_ATTR_MESH_ID]) {
1140                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1141                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1142         }
1143
1144         if (info->attrs[NL80211_ATTR_4ADDR]) {
1145                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1146                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1147                 if (err)
1148                         goto unlock;
1149         }
1150
1151         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1152                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1153                                   &flags);
1154         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1155                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1156                 type, err ? NULL : &flags, &params);
1157
1158  unlock:
1159         cfg80211_unlock_rdev(rdev);
1160  unlock_rtnl:
1161         rtnl_unlock();
1162         return err;
1163 }
1164
1165 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1166 {
1167         struct cfg80211_registered_device *rdev;
1168         int err;
1169         struct net_device *dev;
1170
1171         rtnl_lock();
1172
1173         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1174         if (err)
1175                 goto unlock_rtnl;
1176
1177         if (!rdev->ops->del_virtual_intf) {
1178                 err = -EOPNOTSUPP;
1179                 goto out;
1180         }
1181
1182         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1183
1184  out:
1185         cfg80211_unlock_rdev(rdev);
1186         dev_put(dev);
1187  unlock_rtnl:
1188         rtnl_unlock();
1189         return err;
1190 }
1191
1192 struct get_key_cookie {
1193         struct sk_buff *msg;
1194         int error;
1195         int idx;
1196 };
1197
1198 static void get_key_callback(void *c, struct key_params *params)
1199 {
1200         struct nlattr *key;
1201         struct get_key_cookie *cookie = c;
1202
1203         if (params->key)
1204                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1205                         params->key_len, params->key);
1206
1207         if (params->seq)
1208                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1209                         params->seq_len, params->seq);
1210
1211         if (params->cipher)
1212                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1213                             params->cipher);
1214
1215         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1216         if (!key)
1217                 goto nla_put_failure;
1218
1219         if (params->key)
1220                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1221                         params->key_len, params->key);
1222
1223         if (params->seq)
1224                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1225                         params->seq_len, params->seq);
1226
1227         if (params->cipher)
1228                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1229                             params->cipher);
1230
1231         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1232
1233         nla_nest_end(cookie->msg, key);
1234
1235         return;
1236  nla_put_failure:
1237         cookie->error = 1;
1238 }
1239
1240 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1241 {
1242         struct cfg80211_registered_device *rdev;
1243         int err;
1244         struct net_device *dev;
1245         u8 key_idx = 0;
1246         u8 *mac_addr = NULL;
1247         struct get_key_cookie cookie = {
1248                 .error = 0,
1249         };
1250         void *hdr;
1251         struct sk_buff *msg;
1252
1253         if (info->attrs[NL80211_ATTR_KEY_IDX])
1254                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1255
1256         if (key_idx > 5)
1257                 return -EINVAL;
1258
1259         if (info->attrs[NL80211_ATTR_MAC])
1260                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1261
1262         rtnl_lock();
1263
1264         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1265         if (err)
1266                 goto unlock_rtnl;
1267
1268         if (!rdev->ops->get_key) {
1269                 err = -EOPNOTSUPP;
1270                 goto out;
1271         }
1272
1273         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1274         if (!msg) {
1275                 err = -ENOMEM;
1276                 goto out;
1277         }
1278
1279         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1280                              NL80211_CMD_NEW_KEY);
1281
1282         if (IS_ERR(hdr)) {
1283                 err = PTR_ERR(hdr);
1284                 goto free_msg;
1285         }
1286
1287         cookie.msg = msg;
1288         cookie.idx = key_idx;
1289
1290         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1291         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1292         if (mac_addr)
1293                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1294
1295         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1296                                 &cookie, get_key_callback);
1297
1298         if (err)
1299                 goto free_msg;
1300
1301         if (cookie.error)
1302                 goto nla_put_failure;
1303
1304         genlmsg_end(msg, hdr);
1305         err = genlmsg_reply(msg, info);
1306         goto out;
1307
1308  nla_put_failure:
1309         err = -ENOBUFS;
1310  free_msg:
1311         nlmsg_free(msg);
1312  out:
1313         cfg80211_unlock_rdev(rdev);
1314         dev_put(dev);
1315  unlock_rtnl:
1316         rtnl_unlock();
1317
1318         return err;
1319 }
1320
1321 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1322 {
1323         struct cfg80211_registered_device *rdev;
1324         struct key_parse key;
1325         int err;
1326         struct net_device *dev;
1327         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1328                     u8 key_index);
1329
1330         err = nl80211_parse_key(info, &key);
1331         if (err)
1332                 return err;
1333
1334         if (key.idx < 0)
1335                 return -EINVAL;
1336
1337         /* only support setting default key */
1338         if (!key.def && !key.defmgmt)
1339                 return -EINVAL;
1340
1341         rtnl_lock();
1342
1343         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1344         if (err)
1345                 goto unlock_rtnl;
1346
1347         if (key.def)
1348                 func = rdev->ops->set_default_key;
1349         else
1350                 func = rdev->ops->set_default_mgmt_key;
1351
1352         if (!func) {
1353                 err = -EOPNOTSUPP;
1354                 goto out;
1355         }
1356
1357         wdev_lock(dev->ieee80211_ptr);
1358         err = nl80211_key_allowed(dev->ieee80211_ptr);
1359         if (!err)
1360                 err = func(&rdev->wiphy, dev, key.idx);
1361
1362 #ifdef CONFIG_CFG80211_WEXT
1363         if (!err) {
1364                 if (func == rdev->ops->set_default_key)
1365                         dev->ieee80211_ptr->wext.default_key = key.idx;
1366                 else
1367                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1368         }
1369 #endif
1370         wdev_unlock(dev->ieee80211_ptr);
1371
1372  out:
1373         cfg80211_unlock_rdev(rdev);
1374         dev_put(dev);
1375
1376  unlock_rtnl:
1377         rtnl_unlock();
1378
1379         return err;
1380 }
1381
1382 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1383 {
1384         struct cfg80211_registered_device *rdev;
1385         int err;
1386         struct net_device *dev;
1387         struct key_parse key;
1388         u8 *mac_addr = NULL;
1389
1390         err = nl80211_parse_key(info, &key);
1391         if (err)
1392                 return err;
1393
1394         if (!key.p.key)
1395                 return -EINVAL;
1396
1397         if (info->attrs[NL80211_ATTR_MAC])
1398                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1399
1400         rtnl_lock();
1401
1402         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1403         if (err)
1404                 goto unlock_rtnl;
1405
1406         if (!rdev->ops->add_key) {
1407                 err = -EOPNOTSUPP;
1408                 goto out;
1409         }
1410
1411         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1412                 err = -EINVAL;
1413                 goto out;
1414         }
1415
1416         wdev_lock(dev->ieee80211_ptr);
1417         err = nl80211_key_allowed(dev->ieee80211_ptr);
1418         if (!err)
1419                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1420                                          mac_addr, &key.p);
1421         wdev_unlock(dev->ieee80211_ptr);
1422
1423  out:
1424         cfg80211_unlock_rdev(rdev);
1425         dev_put(dev);
1426  unlock_rtnl:
1427         rtnl_unlock();
1428
1429         return err;
1430 }
1431
1432 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1433 {
1434         struct cfg80211_registered_device *rdev;
1435         int err;
1436         struct net_device *dev;
1437         u8 *mac_addr = NULL;
1438         struct key_parse key;
1439
1440         err = nl80211_parse_key(info, &key);
1441         if (err)
1442                 return err;
1443
1444         if (info->attrs[NL80211_ATTR_MAC])
1445                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1446
1447         rtnl_lock();
1448
1449         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1450         if (err)
1451                 goto unlock_rtnl;
1452
1453         if (!rdev->ops->del_key) {
1454                 err = -EOPNOTSUPP;
1455                 goto out;
1456         }
1457
1458         wdev_lock(dev->ieee80211_ptr);
1459         err = nl80211_key_allowed(dev->ieee80211_ptr);
1460         if (!err)
1461                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1462
1463 #ifdef CONFIG_CFG80211_WEXT
1464         if (!err) {
1465                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1466                         dev->ieee80211_ptr->wext.default_key = -1;
1467                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1468                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1469         }
1470 #endif
1471         wdev_unlock(dev->ieee80211_ptr);
1472
1473  out:
1474         cfg80211_unlock_rdev(rdev);
1475         dev_put(dev);
1476
1477  unlock_rtnl:
1478         rtnl_unlock();
1479
1480         return err;
1481 }
1482
1483 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1484 {
1485         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1486                     struct beacon_parameters *info);
1487         struct cfg80211_registered_device *rdev;
1488         int err;
1489         struct net_device *dev;
1490         struct beacon_parameters params;
1491         int haveinfo = 0;
1492
1493         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1494                 return -EINVAL;
1495
1496         rtnl_lock();
1497
1498         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1499         if (err)
1500                 goto unlock_rtnl;
1501
1502         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1503                 err = -EOPNOTSUPP;
1504                 goto out;
1505         }
1506
1507         switch (info->genlhdr->cmd) {
1508         case NL80211_CMD_NEW_BEACON:
1509                 /* these are required for NEW_BEACON */
1510                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1511                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1512                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1513                         err = -EINVAL;
1514                         goto out;
1515                 }
1516
1517                 call = rdev->ops->add_beacon;
1518                 break;
1519         case NL80211_CMD_SET_BEACON:
1520                 call = rdev->ops->set_beacon;
1521                 break;
1522         default:
1523                 WARN_ON(1);
1524                 err = -EOPNOTSUPP;
1525                 goto out;
1526         }
1527
1528         if (!call) {
1529                 err = -EOPNOTSUPP;
1530                 goto out;
1531         }
1532
1533         memset(&params, 0, sizeof(params));
1534
1535         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1536                 params.interval =
1537                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1538                 haveinfo = 1;
1539         }
1540
1541         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1542                 params.dtim_period =
1543                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1544                 haveinfo = 1;
1545         }
1546
1547         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1548                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1549                 params.head_len =
1550                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1551                 haveinfo = 1;
1552         }
1553
1554         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1555                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1556                 params.tail_len =
1557                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1558                 haveinfo = 1;
1559         }
1560
1561         if (!haveinfo) {
1562                 err = -EINVAL;
1563                 goto out;
1564         }
1565
1566         err = call(&rdev->wiphy, dev, &params);
1567
1568  out:
1569         cfg80211_unlock_rdev(rdev);
1570         dev_put(dev);
1571  unlock_rtnl:
1572         rtnl_unlock();
1573
1574         return err;
1575 }
1576
1577 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1578 {
1579         struct cfg80211_registered_device *rdev;
1580         int err;
1581         struct net_device *dev;
1582
1583         rtnl_lock();
1584
1585         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1586         if (err)
1587                 goto unlock_rtnl;
1588
1589         if (!rdev->ops->del_beacon) {
1590                 err = -EOPNOTSUPP;
1591                 goto out;
1592         }
1593
1594         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1595                 err = -EOPNOTSUPP;
1596                 goto out;
1597         }
1598         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1599
1600  out:
1601         cfg80211_unlock_rdev(rdev);
1602         dev_put(dev);
1603  unlock_rtnl:
1604         rtnl_unlock();
1605
1606         return err;
1607 }
1608
1609 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1610         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1611         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1612         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1613         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1614 };
1615
1616 static int parse_station_flags(struct genl_info *info,
1617                                struct station_parameters *params)
1618 {
1619         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1620         struct nlattr *nla;
1621         int flag;
1622
1623         /*
1624          * Try parsing the new attribute first so userspace
1625          * can specify both for older kernels.
1626          */
1627         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1628         if (nla) {
1629                 struct nl80211_sta_flag_update *sta_flags;
1630
1631                 sta_flags = nla_data(nla);
1632                 params->sta_flags_mask = sta_flags->mask;
1633                 params->sta_flags_set = sta_flags->set;
1634                 if ((params->sta_flags_mask |
1635                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1636                         return -EINVAL;
1637                 return 0;
1638         }
1639
1640         /* if present, parse the old attribute */
1641
1642         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1643         if (!nla)
1644                 return 0;
1645
1646         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1647                              nla, sta_flags_policy))
1648                 return -EINVAL;
1649
1650         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1651         params->sta_flags_mask &= ~1;
1652
1653         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1654                 if (flags[flag])
1655                         params->sta_flags_set |= (1<<flag);
1656
1657         return 0;
1658 }
1659
1660 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1661                                 int flags, struct net_device *dev,
1662                                 const u8 *mac_addr, struct station_info *sinfo)
1663 {
1664         void *hdr;
1665         struct nlattr *sinfoattr, *txrate;
1666         u16 bitrate;
1667
1668         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1669         if (!hdr)
1670                 return -1;
1671
1672         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1673         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1674
1675         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1676
1677         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1678         if (!sinfoattr)
1679                 goto nla_put_failure;
1680         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1681                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1682                             sinfo->inactive_time);
1683         if (sinfo->filled & STATION_INFO_RX_BYTES)
1684                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1685                             sinfo->rx_bytes);
1686         if (sinfo->filled & STATION_INFO_TX_BYTES)
1687                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1688                             sinfo->tx_bytes);
1689         if (sinfo->filled & STATION_INFO_LLID)
1690                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1691                             sinfo->llid);
1692         if (sinfo->filled & STATION_INFO_PLID)
1693                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1694                             sinfo->plid);
1695         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1696                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1697                             sinfo->plink_state);
1698         if (sinfo->filled & STATION_INFO_SIGNAL)
1699                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1700                            sinfo->signal);
1701         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1702                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1703                 if (!txrate)
1704                         goto nla_put_failure;
1705
1706                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1707                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1708                 if (bitrate > 0)
1709                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1710
1711                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1712                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1713                                     sinfo->txrate.mcs);
1714                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1715                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1716                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1717                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1718
1719                 nla_nest_end(msg, txrate);
1720         }
1721         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1722                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1723                             sinfo->rx_packets);
1724         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1725                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1726                             sinfo->tx_packets);
1727         nla_nest_end(msg, sinfoattr);
1728
1729         return genlmsg_end(msg, hdr);
1730
1731  nla_put_failure:
1732         genlmsg_cancel(msg, hdr);
1733         return -EMSGSIZE;
1734 }
1735
1736 static int nl80211_dump_station(struct sk_buff *skb,
1737                                 struct netlink_callback *cb)
1738 {
1739         struct station_info sinfo;
1740         struct cfg80211_registered_device *dev;
1741         struct net_device *netdev;
1742         u8 mac_addr[ETH_ALEN];
1743         int ifidx = cb->args[0];
1744         int sta_idx = cb->args[1];
1745         int err;
1746
1747         if (!ifidx)
1748                 ifidx = nl80211_get_ifidx(cb);
1749         if (ifidx < 0)
1750                 return ifidx;
1751
1752         rtnl_lock();
1753
1754         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1755         if (!netdev) {
1756                 err = -ENODEV;
1757                 goto out_rtnl;
1758         }
1759
1760         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1761         if (IS_ERR(dev)) {
1762                 err = PTR_ERR(dev);
1763                 goto out_rtnl;
1764         }
1765
1766         if (!dev->ops->dump_station) {
1767                 err = -EOPNOTSUPP;
1768                 goto out_err;
1769         }
1770
1771         while (1) {
1772                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1773                                              mac_addr, &sinfo);
1774                 if (err == -ENOENT)
1775                         break;
1776                 if (err)
1777                         goto out_err;
1778
1779                 if (nl80211_send_station(skb,
1780                                 NETLINK_CB(cb->skb).pid,
1781                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1782                                 netdev, mac_addr,
1783                                 &sinfo) < 0)
1784                         goto out;
1785
1786                 sta_idx++;
1787         }
1788
1789
1790  out:
1791         cb->args[1] = sta_idx;
1792         err = skb->len;
1793  out_err:
1794         cfg80211_unlock_rdev(dev);
1795  out_rtnl:
1796         rtnl_unlock();
1797
1798         return err;
1799 }
1800
1801 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1802 {
1803         struct cfg80211_registered_device *rdev;
1804         int err;
1805         struct net_device *dev;
1806         struct station_info sinfo;
1807         struct sk_buff *msg;
1808         u8 *mac_addr = NULL;
1809
1810         memset(&sinfo, 0, sizeof(sinfo));
1811
1812         if (!info->attrs[NL80211_ATTR_MAC])
1813                 return -EINVAL;
1814
1815         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1816
1817         rtnl_lock();
1818
1819         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1820         if (err)
1821                 goto out_rtnl;
1822
1823         if (!rdev->ops->get_station) {
1824                 err = -EOPNOTSUPP;
1825                 goto out;
1826         }
1827
1828         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1829         if (err)
1830                 goto out;
1831
1832         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1833         if (!msg)
1834                 goto out;
1835
1836         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1837                                  dev, mac_addr, &sinfo) < 0)
1838                 goto out_free;
1839
1840         err = genlmsg_reply(msg, info);
1841         goto out;
1842
1843  out_free:
1844         nlmsg_free(msg);
1845  out:
1846         cfg80211_unlock_rdev(rdev);
1847         dev_put(dev);
1848  out_rtnl:
1849         rtnl_unlock();
1850
1851         return err;
1852 }
1853
1854 /*
1855  * Get vlan interface making sure it is running and on the right wiphy.
1856  */
1857 static int get_vlan(struct genl_info *info,
1858                     struct cfg80211_registered_device *rdev,
1859                     struct net_device **vlan)
1860 {
1861         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1862         *vlan = NULL;
1863
1864         if (vlanattr) {
1865                 *vlan = dev_get_by_index(genl_info_net(info),
1866                                          nla_get_u32(vlanattr));
1867                 if (!*vlan)
1868                         return -ENODEV;
1869                 if (!(*vlan)->ieee80211_ptr)
1870                         return -EINVAL;
1871                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1872                         return -EINVAL;
1873                 if (!netif_running(*vlan))
1874                         return -ENETDOWN;
1875         }
1876         return 0;
1877 }
1878
1879 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1880 {
1881         struct cfg80211_registered_device *rdev;
1882         int err;
1883         struct net_device *dev;
1884         struct station_parameters params;
1885         u8 *mac_addr = NULL;
1886
1887         memset(&params, 0, sizeof(params));
1888
1889         params.listen_interval = -1;
1890
1891         if (info->attrs[NL80211_ATTR_STA_AID])
1892                 return -EINVAL;
1893
1894         if (!info->attrs[NL80211_ATTR_MAC])
1895                 return -EINVAL;
1896
1897         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1898
1899         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1900                 params.supported_rates =
1901                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1902                 params.supported_rates_len =
1903                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1904         }
1905
1906         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1907                 params.listen_interval =
1908                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1909
1910         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1911                 params.ht_capa =
1912                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1913
1914         if (parse_station_flags(info, &params))
1915                 return -EINVAL;
1916
1917         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1918                 params.plink_action =
1919                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1920
1921         rtnl_lock();
1922
1923         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1924         if (err)
1925                 goto out_rtnl;
1926
1927         err = get_vlan(info, rdev, &params.vlan);
1928         if (err)
1929                 goto out;
1930
1931         /* validate settings */
1932         err = 0;
1933
1934         switch (dev->ieee80211_ptr->iftype) {
1935         case NL80211_IFTYPE_AP:
1936         case NL80211_IFTYPE_AP_VLAN:
1937                 /* disallow mesh-specific things */
1938                 if (params.plink_action)
1939                         err = -EINVAL;
1940                 break;
1941         case NL80211_IFTYPE_STATION:
1942                 /* disallow everything but AUTHORIZED flag */
1943                 if (params.plink_action)
1944                         err = -EINVAL;
1945                 if (params.vlan)
1946                         err = -EINVAL;
1947                 if (params.supported_rates)
1948                         err = -EINVAL;
1949                 if (params.ht_capa)
1950                         err = -EINVAL;
1951                 if (params.listen_interval >= 0)
1952                         err = -EINVAL;
1953                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1954                         err = -EINVAL;
1955                 break;
1956         case NL80211_IFTYPE_MESH_POINT:
1957                 /* disallow things mesh doesn't support */
1958                 if (params.vlan)
1959                         err = -EINVAL;
1960                 if (params.ht_capa)
1961                         err = -EINVAL;
1962                 if (params.listen_interval >= 0)
1963                         err = -EINVAL;
1964                 if (params.supported_rates)
1965                         err = -EINVAL;
1966                 if (params.sta_flags_mask)
1967                         err = -EINVAL;
1968                 break;
1969         default:
1970                 err = -EINVAL;
1971         }
1972
1973         if (err)
1974                 goto out;
1975
1976         if (!rdev->ops->change_station) {
1977                 err = -EOPNOTSUPP;
1978                 goto out;
1979         }
1980
1981         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1982
1983  out:
1984         if (params.vlan)
1985                 dev_put(params.vlan);
1986         cfg80211_unlock_rdev(rdev);
1987         dev_put(dev);
1988  out_rtnl:
1989         rtnl_unlock();
1990
1991         return err;
1992 }
1993
1994 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1995 {
1996         struct cfg80211_registered_device *rdev;
1997         int err;
1998         struct net_device *dev;
1999         struct station_parameters params;
2000         u8 *mac_addr = NULL;
2001
2002         memset(&params, 0, sizeof(params));
2003
2004         if (!info->attrs[NL80211_ATTR_MAC])
2005                 return -EINVAL;
2006
2007         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2008                 return -EINVAL;
2009
2010         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2011                 return -EINVAL;
2012
2013         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2014         params.supported_rates =
2015                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2016         params.supported_rates_len =
2017                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2018         params.listen_interval =
2019                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2020
2021         if (info->attrs[NL80211_ATTR_STA_AID]) {
2022                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2023                 if (!params.aid || params.aid > IEEE80211_MAX_AID)
2024                         return -EINVAL;
2025         }
2026
2027         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2028                 params.ht_capa =
2029                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2030
2031         if (parse_station_flags(info, &params))
2032                 return -EINVAL;
2033
2034         rtnl_lock();
2035
2036         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2037         if (err)
2038                 goto out_rtnl;
2039
2040         err = get_vlan(info, rdev, &params.vlan);
2041         if (err)
2042                 goto out;
2043
2044         /* validate settings */
2045         err = 0;
2046
2047         switch (dev->ieee80211_ptr->iftype) {
2048         case NL80211_IFTYPE_AP:
2049         case NL80211_IFTYPE_AP_VLAN:
2050                 /* all ok but must have AID */
2051                 if (!params.aid)
2052                         err = -EINVAL;
2053                 break;
2054         case NL80211_IFTYPE_MESH_POINT:
2055                 /* disallow things mesh doesn't support */
2056                 if (params.vlan)
2057                         err = -EINVAL;
2058                 if (params.aid)
2059                         err = -EINVAL;
2060                 if (params.ht_capa)
2061                         err = -EINVAL;
2062                 if (params.listen_interval >= 0)
2063                         err = -EINVAL;
2064                 if (params.supported_rates)
2065                         err = -EINVAL;
2066                 if (params.sta_flags_mask)
2067                         err = -EINVAL;
2068                 break;
2069         default:
2070                 err = -EINVAL;
2071         }
2072
2073         if (err)
2074                 goto out;
2075
2076         if (!rdev->ops->add_station) {
2077                 err = -EOPNOTSUPP;
2078                 goto out;
2079         }
2080
2081         if (!netif_running(dev)) {
2082                 err = -ENETDOWN;
2083                 goto out;
2084         }
2085
2086         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2087
2088  out:
2089         if (params.vlan)
2090                 dev_put(params.vlan);
2091         cfg80211_unlock_rdev(rdev);
2092         dev_put(dev);
2093  out_rtnl:
2094         rtnl_unlock();
2095
2096         return err;
2097 }
2098
2099 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2100 {
2101         struct cfg80211_registered_device *rdev;
2102         int err;
2103         struct net_device *dev;
2104         u8 *mac_addr = NULL;
2105
2106         if (info->attrs[NL80211_ATTR_MAC])
2107                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2108
2109         rtnl_lock();
2110
2111         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2112         if (err)
2113                 goto out_rtnl;
2114
2115         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2116             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2117             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2118                 err = -EINVAL;
2119                 goto out;
2120         }
2121
2122         if (!rdev->ops->del_station) {
2123                 err = -EOPNOTSUPP;
2124                 goto out;
2125         }
2126
2127         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2128
2129  out:
2130         cfg80211_unlock_rdev(rdev);
2131         dev_put(dev);
2132  out_rtnl:
2133         rtnl_unlock();
2134
2135         return err;
2136 }
2137
2138 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2139                                 int flags, struct net_device *dev,
2140                                 u8 *dst, u8 *next_hop,
2141                                 struct mpath_info *pinfo)
2142 {
2143         void *hdr;
2144         struct nlattr *pinfoattr;
2145
2146         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2147         if (!hdr)
2148                 return -1;
2149
2150         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2151         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2152         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2153
2154         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2155
2156         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2157         if (!pinfoattr)
2158                 goto nla_put_failure;
2159         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2160                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2161                             pinfo->frame_qlen);
2162         if (pinfo->filled & MPATH_INFO_SN)
2163                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2164                             pinfo->sn);
2165         if (pinfo->filled & MPATH_INFO_METRIC)
2166                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2167                             pinfo->metric);
2168         if (pinfo->filled & MPATH_INFO_EXPTIME)
2169                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2170                             pinfo->exptime);
2171         if (pinfo->filled & MPATH_INFO_FLAGS)
2172                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2173                             pinfo->flags);
2174         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2175                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2176                             pinfo->discovery_timeout);
2177         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2178                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2179                             pinfo->discovery_retries);
2180
2181         nla_nest_end(msg, pinfoattr);
2182
2183         return genlmsg_end(msg, hdr);
2184
2185  nla_put_failure:
2186         genlmsg_cancel(msg, hdr);
2187         return -EMSGSIZE;
2188 }
2189
2190 static int nl80211_dump_mpath(struct sk_buff *skb,
2191                               struct netlink_callback *cb)
2192 {
2193         struct mpath_info pinfo;
2194         struct cfg80211_registered_device *dev;
2195         struct net_device *netdev;
2196         u8 dst[ETH_ALEN];
2197         u8 next_hop[ETH_ALEN];
2198         int ifidx = cb->args[0];
2199         int path_idx = cb->args[1];
2200         int err;
2201
2202         if (!ifidx)
2203                 ifidx = nl80211_get_ifidx(cb);
2204         if (ifidx < 0)
2205                 return ifidx;
2206
2207         rtnl_lock();
2208
2209         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2210         if (!netdev) {
2211                 err = -ENODEV;
2212                 goto out_rtnl;
2213         }
2214
2215         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2216         if (IS_ERR(dev)) {
2217                 err = PTR_ERR(dev);
2218                 goto out_rtnl;
2219         }
2220
2221         if (!dev->ops->dump_mpath) {
2222                 err = -EOPNOTSUPP;
2223                 goto out_err;
2224         }
2225
2226         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2227                 err = -EOPNOTSUPP;
2228                 goto out_err;
2229         }
2230
2231         while (1) {
2232                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2233                                            dst, next_hop, &pinfo);
2234                 if (err == -ENOENT)
2235                         break;
2236                 if (err)
2237                         goto out_err;
2238
2239                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2240                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2241                                        netdev, dst, next_hop,
2242                                        &pinfo) < 0)
2243                         goto out;
2244
2245                 path_idx++;
2246         }
2247
2248
2249  out:
2250         cb->args[1] = path_idx;
2251         err = skb->len;
2252  out_err:
2253         cfg80211_unlock_rdev(dev);
2254  out_rtnl:
2255         rtnl_unlock();
2256
2257         return err;
2258 }
2259
2260 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2261 {
2262         struct cfg80211_registered_device *rdev;
2263         int err;
2264         struct net_device *dev;
2265         struct mpath_info pinfo;
2266         struct sk_buff *msg;
2267         u8 *dst = NULL;
2268         u8 next_hop[ETH_ALEN];
2269
2270         memset(&pinfo, 0, sizeof(pinfo));
2271
2272         if (!info->attrs[NL80211_ATTR_MAC])
2273                 return -EINVAL;
2274
2275         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2276
2277         rtnl_lock();
2278
2279         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2280         if (err)
2281                 goto out_rtnl;
2282
2283         if (!rdev->ops->get_mpath) {
2284                 err = -EOPNOTSUPP;
2285                 goto out;
2286         }
2287
2288         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2289                 err = -EOPNOTSUPP;
2290                 goto out;
2291         }
2292
2293         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2294         if (err)
2295                 goto out;
2296
2297         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2298         if (!msg)
2299                 goto out;
2300
2301         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2302                                  dev, dst, next_hop, &pinfo) < 0)
2303                 goto out_free;
2304
2305         err = genlmsg_reply(msg, info);
2306         goto out;
2307
2308  out_free:
2309         nlmsg_free(msg);
2310  out:
2311         cfg80211_unlock_rdev(rdev);
2312         dev_put(dev);
2313  out_rtnl:
2314         rtnl_unlock();
2315
2316         return err;
2317 }
2318
2319 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2320 {
2321         struct cfg80211_registered_device *rdev;
2322         int err;
2323         struct net_device *dev;
2324         u8 *dst = NULL;
2325         u8 *next_hop = NULL;
2326
2327         if (!info->attrs[NL80211_ATTR_MAC])
2328                 return -EINVAL;
2329
2330         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2331                 return -EINVAL;
2332
2333         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2334         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2335
2336         rtnl_lock();
2337
2338         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2339         if (err)
2340                 goto out_rtnl;
2341
2342         if (!rdev->ops->change_mpath) {
2343                 err = -EOPNOTSUPP;
2344                 goto out;
2345         }
2346
2347         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2348                 err = -EOPNOTSUPP;
2349                 goto out;
2350         }
2351
2352         if (!netif_running(dev)) {
2353                 err = -ENETDOWN;
2354                 goto out;
2355         }
2356
2357         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2358
2359  out:
2360         cfg80211_unlock_rdev(rdev);
2361         dev_put(dev);
2362  out_rtnl:
2363         rtnl_unlock();
2364
2365         return err;
2366 }
2367 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2368 {
2369         struct cfg80211_registered_device *rdev;
2370         int err;
2371         struct net_device *dev;
2372         u8 *dst = NULL;
2373         u8 *next_hop = NULL;
2374
2375         if (!info->attrs[NL80211_ATTR_MAC])
2376                 return -EINVAL;
2377
2378         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2379                 return -EINVAL;
2380
2381         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2382         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2383
2384         rtnl_lock();
2385
2386         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2387         if (err)
2388                 goto out_rtnl;
2389
2390         if (!rdev->ops->add_mpath) {
2391                 err = -EOPNOTSUPP;
2392                 goto out;
2393         }
2394
2395         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2396                 err = -EOPNOTSUPP;
2397                 goto out;
2398         }
2399
2400         if (!netif_running(dev)) {
2401                 err = -ENETDOWN;
2402                 goto out;
2403         }
2404
2405         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2406
2407  out:
2408         cfg80211_unlock_rdev(rdev);
2409         dev_put(dev);
2410  out_rtnl:
2411         rtnl_unlock();
2412
2413         return err;
2414 }
2415
2416 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2417 {
2418         struct cfg80211_registered_device *rdev;
2419         int err;
2420         struct net_device *dev;
2421         u8 *dst = NULL;
2422
2423         if (info->attrs[NL80211_ATTR_MAC])
2424                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2425
2426         rtnl_lock();
2427
2428         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2429         if (err)
2430                 goto out_rtnl;
2431
2432         if (!rdev->ops->del_mpath) {
2433                 err = -EOPNOTSUPP;
2434                 goto out;
2435         }
2436
2437         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2438
2439  out:
2440         cfg80211_unlock_rdev(rdev);
2441         dev_put(dev);
2442  out_rtnl:
2443         rtnl_unlock();
2444
2445         return err;
2446 }
2447
2448 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2449 {
2450         struct cfg80211_registered_device *rdev;
2451         int err;
2452         struct net_device *dev;
2453         struct bss_parameters params;
2454
2455         memset(&params, 0, sizeof(params));
2456         /* default to not changing parameters */
2457         params.use_cts_prot = -1;
2458         params.use_short_preamble = -1;
2459         params.use_short_slot_time = -1;
2460
2461         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2462                 params.use_cts_prot =
2463                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2464         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2465                 params.use_short_preamble =
2466                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2467         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2468                 params.use_short_slot_time =
2469                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2470         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2471                 params.basic_rates =
2472                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2473                 params.basic_rates_len =
2474                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2475         }
2476
2477         rtnl_lock();
2478
2479         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2480         if (err)
2481                 goto out_rtnl;
2482
2483         if (!rdev->ops->change_bss) {
2484                 err = -EOPNOTSUPP;
2485                 goto out;
2486         }
2487
2488         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2489                 err = -EOPNOTSUPP;
2490                 goto out;
2491         }
2492
2493         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2494
2495  out:
2496         cfg80211_unlock_rdev(rdev);
2497         dev_put(dev);
2498  out_rtnl:
2499         rtnl_unlock();
2500
2501         return err;
2502 }
2503
2504 static const struct nla_policy
2505         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2506         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2507         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2508         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2509         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2510         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2511         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2512 };
2513
2514 static int parse_reg_rule(struct nlattr *tb[],
2515         struct ieee80211_reg_rule *reg_rule)
2516 {
2517         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2518         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2519
2520         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2521                 return -EINVAL;
2522         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2523                 return -EINVAL;
2524         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2525                 return -EINVAL;
2526         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2527                 return -EINVAL;
2528         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2529                 return -EINVAL;
2530
2531         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2532
2533         freq_range->start_freq_khz =
2534                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2535         freq_range->end_freq_khz =
2536                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2537         freq_range->max_bandwidth_khz =
2538                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2539
2540         power_rule->max_eirp =
2541                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2542
2543         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2544                 power_rule->max_antenna_gain =
2545                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2546
2547         return 0;
2548 }
2549
2550 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2551 {
2552         int r;
2553         char *data = NULL;
2554
2555         /*
2556          * You should only get this when cfg80211 hasn't yet initialized
2557          * completely when built-in to the kernel right between the time
2558          * window between nl80211_init() and regulatory_init(), if that is
2559          * even possible.
2560          */
2561         mutex_lock(&cfg80211_mutex);
2562         if (unlikely(!cfg80211_regdomain)) {
2563                 mutex_unlock(&cfg80211_mutex);
2564                 return -EINPROGRESS;
2565         }
2566         mutex_unlock(&cfg80211_mutex);
2567
2568         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2569                 return -EINVAL;
2570
2571         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2572
2573         r = regulatory_hint_user(data);
2574
2575         return r;
2576 }
2577
2578 static int nl80211_get_mesh_params(struct sk_buff *skb,
2579         struct genl_info *info)
2580 {
2581         struct cfg80211_registered_device *rdev;
2582         struct mesh_config cur_params;
2583         int err;
2584         struct net_device *dev;
2585         void *hdr;
2586         struct nlattr *pinfoattr;
2587         struct sk_buff *msg;
2588
2589         rtnl_lock();
2590
2591         /* Look up our device */
2592         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2593         if (err)
2594                 goto out_rtnl;
2595
2596         if (!rdev->ops->get_mesh_params) {
2597                 err = -EOPNOTSUPP;
2598                 goto out;
2599         }
2600
2601         /* Get the mesh params */
2602         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2603         if (err)
2604                 goto out;
2605
2606         /* Draw up a netlink message to send back */
2607         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2608         if (!msg) {
2609                 err = -ENOBUFS;
2610                 goto out;
2611         }
2612         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2613                              NL80211_CMD_GET_MESH_PARAMS);
2614         if (!hdr)
2615                 goto nla_put_failure;
2616         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2617         if (!pinfoattr)
2618                 goto nla_put_failure;
2619         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2620         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2621                         cur_params.dot11MeshRetryTimeout);
2622         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2623                         cur_params.dot11MeshConfirmTimeout);
2624         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2625                         cur_params.dot11MeshHoldingTimeout);
2626         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2627                         cur_params.dot11MeshMaxPeerLinks);
2628         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2629                         cur_params.dot11MeshMaxRetries);
2630         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2631                         cur_params.dot11MeshTTL);
2632         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2633                         cur_params.auto_open_plinks);
2634         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2635                         cur_params.dot11MeshHWMPmaxPREQretries);
2636         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2637                         cur_params.path_refresh_time);
2638         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2639                         cur_params.min_discovery_timeout);
2640         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2641                         cur_params.dot11MeshHWMPactivePathTimeout);
2642         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2643                         cur_params.dot11MeshHWMPpreqMinInterval);
2644         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2645                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2646         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2647                         cur_params.dot11MeshHWMPRootMode);
2648         nla_nest_end(msg, pinfoattr);
2649         genlmsg_end(msg, hdr);
2650         err = genlmsg_reply(msg, info);
2651         goto out;
2652
2653  nla_put_failure:
2654         genlmsg_cancel(msg, hdr);
2655         err = -EMSGSIZE;
2656  out:
2657         /* Cleanup */
2658         cfg80211_unlock_rdev(rdev);
2659         dev_put(dev);
2660  out_rtnl:
2661         rtnl_unlock();
2662
2663         return err;
2664 }
2665
2666 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2667 do {\
2668         if (table[attr_num]) {\
2669                 cfg.param = nla_fn(table[attr_num]); \
2670                 mask |= (1 << (attr_num - 1)); \
2671         } \
2672 } while (0);\
2673
2674 static struct nla_policy
2675 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2676         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2677         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2678         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2679         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2680         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2681         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2682         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2683
2684         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2685         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2686         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2687         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2688         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2689         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2690 };
2691
2692 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2693 {
2694         int err;
2695         u32 mask;
2696         struct cfg80211_registered_device *rdev;
2697         struct net_device *dev;
2698         struct mesh_config cfg;
2699         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2700         struct nlattr *parent_attr;
2701
2702         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2703         if (!parent_attr)
2704                 return -EINVAL;
2705         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2706                         parent_attr, nl80211_meshconf_params_policy))
2707                 return -EINVAL;
2708
2709         rtnl_lock();
2710
2711         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2712         if (err)
2713                 goto out_rtnl;
2714
2715         if (!rdev->ops->set_mesh_params) {
2716                 err = -EOPNOTSUPP;
2717                 goto out;
2718         }
2719
2720         /* This makes sure that there aren't more than 32 mesh config
2721          * parameters (otherwise our bitfield scheme would not work.) */
2722         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2723
2724         /* Fill in the params struct */
2725         mask = 0;
2726         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2727                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2728         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2729                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2730         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2731                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2732         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2733                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2734         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2735                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2736         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2737                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2738         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2739                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2740         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2741                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2742                         nla_get_u8);
2743         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2744                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2745         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2746                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2747                         nla_get_u16);
2748         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2749                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2750                         nla_get_u32);
2751         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2752                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2753                         nla_get_u16);
2754         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2755                         dot11MeshHWMPnetDiameterTraversalTime,
2756                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2757                         nla_get_u16);
2758         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2759                         dot11MeshHWMPRootMode, mask,
2760                         NL80211_MESHCONF_HWMP_ROOTMODE,
2761                         nla_get_u8);
2762
2763         /* Apply changes */
2764         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2765
2766  out:
2767         /* cleanup */
2768         cfg80211_unlock_rdev(rdev);
2769         dev_put(dev);
2770  out_rtnl:
2771         rtnl_unlock();
2772
2773         return err;
2774 }
2775
2776 #undef FILL_IN_MESH_PARAM_IF_SET
2777
2778 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2779 {
2780         struct sk_buff *msg;
2781         void *hdr = NULL;
2782         struct nlattr *nl_reg_rules;
2783         unsigned int i;
2784         int err = -EINVAL;
2785
2786         mutex_lock(&cfg80211_mutex);
2787
2788         if (!cfg80211_regdomain)
2789                 goto out;
2790
2791         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2792         if (!msg) {
2793                 err = -ENOBUFS;
2794                 goto out;
2795         }
2796
2797         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2798                              NL80211_CMD_GET_REG);
2799         if (!hdr)
2800                 goto nla_put_failure;
2801
2802         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2803                 cfg80211_regdomain->alpha2);
2804
2805         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2806         if (!nl_reg_rules)
2807                 goto nla_put_failure;
2808
2809         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2810                 struct nlattr *nl_reg_rule;
2811                 const struct ieee80211_reg_rule *reg_rule;
2812                 const struct ieee80211_freq_range *freq_range;
2813                 const struct ieee80211_power_rule *power_rule;
2814
2815                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2816                 freq_range = &reg_rule->freq_range;
2817                 power_rule = &reg_rule->power_rule;
2818
2819                 nl_reg_rule = nla_nest_start(msg, i);
2820                 if (!nl_reg_rule)
2821                         goto nla_put_failure;
2822
2823                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2824                         reg_rule->flags);
2825                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2826                         freq_range->start_freq_khz);
2827                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2828                         freq_range->end_freq_khz);
2829                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2830                         freq_range->max_bandwidth_khz);
2831                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2832                         power_rule->max_antenna_gain);
2833                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2834                         power_rule->max_eirp);
2835
2836                 nla_nest_end(msg, nl_reg_rule);
2837         }
2838
2839         nla_nest_end(msg, nl_reg_rules);
2840
2841         genlmsg_end(msg, hdr);
2842         err = genlmsg_reply(msg, info);
2843         goto out;
2844
2845 nla_put_failure:
2846         genlmsg_cancel(msg, hdr);
2847         err = -EMSGSIZE;
2848 out:
2849         mutex_unlock(&cfg80211_mutex);
2850         return err;
2851 }
2852
2853 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2854 {
2855         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2856         struct nlattr *nl_reg_rule;
2857         char *alpha2 = NULL;
2858         int rem_reg_rules = 0, r = 0;
2859         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2860         struct ieee80211_regdomain *rd = NULL;
2861
2862         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2863                 return -EINVAL;
2864
2865         if (!info->attrs[NL80211_ATTR_REG_RULES])
2866                 return -EINVAL;
2867
2868         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2869
2870         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2871                         rem_reg_rules) {
2872                 num_rules++;
2873                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2874                         return -EINVAL;
2875         }
2876
2877         mutex_lock(&cfg80211_mutex);
2878
2879         if (!reg_is_valid_request(alpha2)) {
2880                 r = -EINVAL;
2881                 goto bad_reg;
2882         }
2883
2884         size_of_regd = sizeof(struct ieee80211_regdomain) +
2885                 (num_rules * sizeof(struct ieee80211_reg_rule));
2886
2887         rd = kzalloc(size_of_regd, GFP_KERNEL);
2888         if (!rd) {
2889                 r = -ENOMEM;
2890                 goto bad_reg;
2891         }
2892
2893         rd->n_reg_rules = num_rules;
2894         rd->alpha2[0] = alpha2[0];
2895         rd->alpha2[1] = alpha2[1];
2896
2897         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2898                         rem_reg_rules) {
2899                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2900                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2901                         reg_rule_policy);
2902                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2903                 if (r)
2904                         goto bad_reg;
2905
2906                 rule_idx++;
2907
2908                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2909                         r = -EINVAL;
2910                         goto bad_reg;
2911                 }
2912         }
2913
2914         BUG_ON(rule_idx != num_rules);
2915
2916         r = set_regdom(rd);
2917
2918         mutex_unlock(&cfg80211_mutex);
2919
2920         return r;
2921
2922  bad_reg:
2923         mutex_unlock(&cfg80211_mutex);
2924         kfree(rd);
2925         return r;
2926 }
2927
2928 static int validate_scan_freqs(struct nlattr *freqs)
2929 {
2930         struct nlattr *attr1, *attr2;
2931         int n_channels = 0, tmp1, tmp2;
2932
2933         nla_for_each_nested(attr1, freqs, tmp1) {
2934                 n_channels++;
2935                 /*
2936                  * Some hardware has a limited channel list for
2937                  * scanning, and it is pretty much nonsensical
2938                  * to scan for a channel twice, so disallow that
2939                  * and don't require drivers to check that the
2940                  * channel list they get isn't longer than what
2941                  * they can scan, as long as they can scan all
2942                  * the channels they registered at once.
2943                  */
2944                 nla_for_each_nested(attr2, freqs, tmp2)
2945                         if (attr1 != attr2 &&
2946                             nla_get_u32(attr1) == nla_get_u32(attr2))
2947                                 return 0;
2948         }
2949
2950         return n_channels;
2951 }
2952
2953 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2954 {
2955         struct cfg80211_registered_device *rdev;
2956         struct net_device *dev;
2957         struct cfg80211_scan_request *request;
2958         struct cfg80211_ssid *ssid;
2959         struct ieee80211_channel *channel;
2960         struct nlattr *attr;
2961         struct wiphy *wiphy;
2962         int err, tmp, n_ssids = 0, n_channels, i;
2963         enum ieee80211_band band;
2964         size_t ie_len;
2965
2966         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2967                 return -EINVAL;
2968
2969         rtnl_lock();
2970
2971         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2972         if (err)
2973                 goto out_rtnl;
2974
2975         wiphy = &rdev->wiphy;
2976
2977         if (!rdev->ops->scan) {
2978                 err = -EOPNOTSUPP;
2979                 goto out;
2980         }
2981
2982         if (!netif_running(dev)) {
2983                 err = -ENETDOWN;
2984                 goto out;
2985         }
2986
2987         if (rdev->scan_req) {
2988                 err = -EBUSY;
2989                 goto out;
2990         }
2991
2992         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2993                 n_channels = validate_scan_freqs(
2994                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2995                 if (!n_channels) {
2996                         err = -EINVAL;
2997                         goto out;
2998                 }
2999         } else {
3000                 n_channels = 0;
3001
3002                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3003                         if (wiphy->bands[band])
3004                                 n_channels += wiphy->bands[band]->n_channels;
3005         }
3006
3007         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3008                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3009                         n_ssids++;
3010
3011         if (n_ssids > wiphy->max_scan_ssids) {
3012                 err = -EINVAL;
3013                 goto out;
3014         }
3015
3016         if (info->attrs[NL80211_ATTR_IE])
3017                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3018         else
3019                 ie_len = 0;
3020
3021         if (ie_len > wiphy->max_scan_ie_len) {
3022                 err = -EINVAL;
3023                 goto out;
3024         }
3025
3026         request = kzalloc(sizeof(*request)
3027                         + sizeof(*ssid) * n_ssids
3028                         + sizeof(channel) * n_channels
3029                         + ie_len, GFP_KERNEL);
3030         if (!request) {
3031                 err = -ENOMEM;
3032                 goto out;
3033         }
3034
3035         if (n_ssids)
3036                 request->ssids = (void *)&request->channels[n_channels];
3037         request->n_ssids = n_ssids;
3038         if (ie_len) {
3039                 if (request->ssids)
3040                         request->ie = (void *)(request->ssids + n_ssids);
3041                 else
3042                         request->ie = (void *)(request->channels + n_channels);
3043         }
3044
3045         i = 0;
3046         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3047                 /* user specified, bail out if channel not found */
3048                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3049                         struct ieee80211_channel *chan;
3050
3051                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3052
3053                         if (!chan) {
3054                                 err = -EINVAL;
3055                                 goto out_free;
3056                         }
3057
3058                         /* ignore disabled channels */
3059                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3060                                 continue;
3061
3062                         request->channels[i] = chan;
3063                         i++;
3064                 }
3065         } else {
3066                 /* all channels */
3067                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3068                         int j;
3069                         if (!wiphy->bands[band])
3070                                 continue;
3071                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3072                                 struct ieee80211_channel *chan;
3073
3074                                 chan = &wiphy->bands[band]->channels[j];
3075
3076                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3077                                         continue;
3078
3079                                 request->channels[i] = chan;
3080                                 i++;
3081                         }
3082                 }
3083         }
3084
3085         if (!i) {
3086                 err = -EINVAL;
3087                 goto out_free;
3088         }
3089
3090         request->n_channels = i;
3091
3092         i = 0;
3093         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3094                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3095                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3096                                 err = -EINVAL;
3097                                 goto out_free;
3098                         }
3099                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3100                         request->ssids[i].ssid_len = nla_len(attr);
3101                         i++;
3102                 }
3103         }
3104
3105         if (info->attrs[NL80211_ATTR_IE]) {
3106                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3107                 memcpy((void *)request->ie,
3108                        nla_data(info->attrs[NL80211_ATTR_IE]),
3109                        request->ie_len);
3110         }
3111
3112         request->dev = dev;
3113         request->wiphy = &rdev->wiphy;
3114
3115         rdev->scan_req = request;
3116         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3117
3118         if (!err) {
3119                 nl80211_send_scan_start(rdev, dev);
3120                 dev_hold(dev);
3121         }
3122
3123  out_free:
3124         if (err) {
3125                 rdev->scan_req = NULL;
3126                 kfree(request);
3127         }
3128  out:
3129         cfg80211_unlock_rdev(rdev);
3130         dev_put(dev);
3131  out_rtnl:
3132         rtnl_unlock();
3133
3134         return err;
3135 }
3136
3137 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3138                             struct cfg80211_registered_device *rdev,
3139                             struct wireless_dev *wdev,
3140                             struct cfg80211_internal_bss *intbss)
3141 {
3142         struct cfg80211_bss *res = &intbss->pub;
3143         void *hdr;
3144         struct nlattr *bss;
3145         int i;
3146
3147         ASSERT_WDEV_LOCK(wdev);
3148
3149         hdr = nl80211hdr_put(msg, pid, seq, flags,
3150                              NL80211_CMD_NEW_SCAN_RESULTS);
3151         if (!hdr)
3152                 return -1;
3153
3154         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3155         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3156
3157         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3158         if (!bss)
3159                 goto nla_put_failure;
3160         if (!is_zero_ether_addr(res->bssid))
3161                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3162         if (res->information_elements && res->len_information_elements)
3163                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3164                         res->len_information_elements,
3165                         res->information_elements);
3166         if (res->beacon_ies && res->len_beacon_ies &&
3167             res->beacon_ies != res->information_elements)
3168                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3169                         res->len_beacon_ies, res->beacon_ies);
3170         if (res->tsf)
3171                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3172         if (res->beacon_interval)
3173                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3174         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3175         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3176         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3177                 jiffies_to_msecs(jiffies - intbss->ts));
3178
3179         switch (rdev->wiphy.signal_type) {
3180         case CFG80211_SIGNAL_TYPE_MBM:
3181                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3182                 break;
3183         case CFG80211_SIGNAL_TYPE_UNSPEC:
3184                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3185                 break;
3186         default:
3187                 break;
3188         }
3189
3190         switch (wdev->iftype) {
3191         case NL80211_IFTYPE_STATION:
3192                 if (intbss == wdev->current_bss)
3193                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3194                                     NL80211_BSS_STATUS_ASSOCIATED);
3195                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3196                         if (intbss != wdev->auth_bsses[i])
3197                                 continue;
3198                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3199                                     NL80211_BSS_STATUS_AUTHENTICATED);
3200                         break;
3201                 }
3202                 break;
3203         case NL80211_IFTYPE_ADHOC:
3204                 if (intbss == wdev->current_bss)
3205                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3206                                     NL80211_BSS_STATUS_IBSS_JOINED);
3207                 break;
3208         default:
3209                 break;
3210         }
3211
3212         nla_nest_end(msg, bss);
3213
3214         return genlmsg_end(msg, hdr);
3215
3216  nla_put_failure:
3217         genlmsg_cancel(msg, hdr);
3218         return -EMSGSIZE;
3219 }
3220
3221 static int nl80211_dump_scan(struct sk_buff *skb,
3222                              struct netlink_callback *cb)
3223 {
3224         struct cfg80211_registered_device *rdev;
3225         struct net_device *dev;
3226         struct cfg80211_internal_bss *scan;
3227         struct wireless_dev *wdev;
3228         int ifidx = cb->args[0];
3229         int start = cb->args[1], idx = 0;
3230         int err;
3231
3232         if (!ifidx)
3233                 ifidx = nl80211_get_ifidx(cb);
3234         if (ifidx < 0)
3235                 return ifidx;
3236         cb->args[0] = ifidx;
3237
3238         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3239         if (!dev)
3240                 return -ENODEV;
3241
3242         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3243         if (IS_ERR(rdev)) {
3244                 err = PTR_ERR(rdev);
3245                 goto out_put_netdev;
3246         }
3247
3248         wdev = dev->ieee80211_ptr;
3249
3250         wdev_lock(wdev);
3251         spin_lock_bh(&rdev->bss_lock);
3252         cfg80211_bss_expire(rdev);
3253
3254         list_for_each_entry(scan, &rdev->bss_list, list) {
3255                 if (++idx <= start)
3256                         continue;
3257                 if (nl80211_send_bss(skb,
3258                                 NETLINK_CB(cb->skb).pid,
3259                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3260                                 rdev, wdev, scan) < 0) {
3261                         idx--;
3262                         goto out;
3263                 }
3264         }
3265
3266  out:
3267         spin_unlock_bh(&rdev->bss_lock);
3268         wdev_unlock(wdev);
3269
3270         cb->args[1] = idx;
3271         err = skb->len;
3272         cfg80211_unlock_rdev(rdev);
3273  out_put_netdev:
3274         dev_put(dev);
3275
3276         return err;
3277 }
3278
3279 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3280                                 int flags, struct net_device *dev,
3281                                 struct survey_info *survey)
3282 {
3283         void *hdr;
3284         struct nlattr *infoattr;
3285
3286         /* Survey without a channel doesn't make sense */
3287         if (!survey->channel)
3288                 return -EINVAL;
3289
3290         hdr = nl80211hdr_put(msg, pid, seq, flags,
3291                              NL80211_CMD_NEW_SURVEY_RESULTS);
3292         if (!hdr)
3293                 return -ENOMEM;
3294
3295         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3296
3297         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3298         if (!infoattr)
3299                 goto nla_put_failure;
3300
3301         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3302                     survey->channel->center_freq);
3303         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3304                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3305                             survey->noise);
3306
3307         nla_nest_end(msg, infoattr);
3308
3309         return genlmsg_end(msg, hdr);
3310
3311  nla_put_failure:
3312         genlmsg_cancel(msg, hdr);
3313         return -EMSGSIZE;
3314 }
3315
3316 static int nl80211_dump_survey(struct sk_buff *skb,
3317                         struct netlink_callback *cb)
3318 {
3319         struct survey_info survey;
3320         struct cfg80211_registered_device *dev;
3321         struct net_device *netdev;
3322         int ifidx = cb->args[0];
3323         int survey_idx = cb->args[1];
3324         int res;
3325
3326         if (!ifidx)
3327                 ifidx = nl80211_get_ifidx(cb);
3328         if (ifidx < 0)
3329                 return ifidx;
3330         cb->args[0] = ifidx;
3331
3332         rtnl_lock();
3333
3334         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3335         if (!netdev) {
3336                 res = -ENODEV;
3337                 goto out_rtnl;
3338         }
3339
3340         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3341         if (IS_ERR(dev)) {
3342                 res = PTR_ERR(dev);
3343                 goto out_rtnl;
3344         }
3345
3346         if (!dev->ops->dump_survey) {
3347                 res = -EOPNOTSUPP;
3348                 goto out_err;
3349         }
3350
3351         while (1) {
3352                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3353                                             &survey);
3354                 if (res == -ENOENT)
3355                         break;
3356                 if (res)
3357                         goto out_err;
3358
3359                 if (nl80211_send_survey(skb,
3360                                 NETLINK_CB(cb->skb).pid,
3361                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3362                                 netdev,
3363                                 &survey) < 0)
3364                         goto out;
3365                 survey_idx++;
3366         }
3367
3368  out:
3369         cb->args[1] = survey_idx;
3370         res = skb->len;
3371  out_err:
3372         cfg80211_unlock_rdev(dev);
3373  out_rtnl:
3374         rtnl_unlock();
3375
3376         return res;
3377 }
3378
3379 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3380 {
3381         return auth_type <= NL80211_AUTHTYPE_MAX;
3382 }
3383
3384 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3385 {
3386         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3387                                   NL80211_WPA_VERSION_2));
3388 }
3389
3390 static bool nl80211_valid_akm_suite(u32 akm)
3391 {
3392         return akm == WLAN_AKM_SUITE_8021X ||
3393                 akm == WLAN_AKM_SUITE_PSK;
3394 }
3395
3396 static bool nl80211_valid_cipher_suite(u32 cipher)
3397 {
3398         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3399                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3400                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3401                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3402                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3403 }
3404
3405
3406 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3407 {
3408         struct cfg80211_registered_device *rdev;
3409         struct net_device *dev;
3410         struct ieee80211_channel *chan;
3411         const u8 *bssid, *ssid, *ie = NULL;
3412         int err, ssid_len, ie_len = 0;
3413         enum nl80211_auth_type auth_type;
3414         struct key_parse key;
3415
3416         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3417                 return -EINVAL;
3418
3419         if (!info->attrs[NL80211_ATTR_MAC])
3420                 return -EINVAL;
3421
3422         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3423                 return -EINVAL;
3424
3425         if (!info->attrs[NL80211_ATTR_SSID])
3426                 return -EINVAL;
3427
3428         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3429                 return -EINVAL;
3430
3431         err = nl80211_parse_key(info, &key);
3432         if (err)
3433                 return err;
3434
3435         if (key.idx >= 0) {
3436                 if (!key.p.key || !key.p.key_len)
3437                         return -EINVAL;
3438                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3439                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3440                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3441                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3442                         return -EINVAL;
3443                 if (key.idx > 4)
3444                         return -EINVAL;
3445         } else {
3446                 key.p.key_len = 0;
3447                 key.p.key = NULL;
3448         }
3449
3450         rtnl_lock();
3451
3452         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3453         if (err)
3454                 goto unlock_rtnl;
3455
3456         if (!rdev->ops->auth) {
3457                 err = -EOPNOTSUPP;
3458                 goto out;
3459         }
3460
3461         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3462                 err = -EOPNOTSUPP;
3463                 goto out;
3464         }
3465
3466         if (!netif_running(dev)) {
3467                 err = -ENETDOWN;
3468                 goto out;
3469         }
3470
3471         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3472         chan = ieee80211_get_channel(&rdev->wiphy,
3473                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3474         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3475                 err = -EINVAL;
3476                 goto out;
3477         }
3478
3479         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3480         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3481
3482         if (info->attrs[NL80211_ATTR_IE]) {
3483                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3484                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3485         }
3486
3487         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3488         if (!nl80211_valid_auth_type(auth_type)) {
3489                 err = -EINVAL;
3490                 goto out;
3491         }
3492
3493         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3494                                  ssid, ssid_len, ie, ie_len,
3495                                  key.p.key, key.p.key_len, key.idx);
3496
3497 out:
3498         cfg80211_unlock_rdev(rdev);
3499         dev_put(dev);
3500 unlock_rtnl:
3501         rtnl_unlock();
3502         return err;
3503 }
3504
3505 static int nl80211_crypto_settings(struct genl_info *info,
3506                                    struct cfg80211_crypto_settings *settings,
3507                                    int cipher_limit)
3508 {
3509         memset(settings, 0, sizeof(*settings));
3510
3511         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3512
3513         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3514                 void *data;
3515                 int len, i;
3516
3517                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3518                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3519                 settings->n_ciphers_pairwise = len / sizeof(u32);
3520
3521                 if (len % sizeof(u32))
3522                         return -EINVAL;
3523
3524                 if (settings->n_ciphers_pairwise > cipher_limit)
3525                         return -EINVAL;
3526
3527                 memcpy(settings->ciphers_pairwise, data, len);
3528
3529                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3530                         if (!nl80211_valid_cipher_suite(
3531                                         settings->ciphers_pairwise[i]))
3532                                 return -EINVAL;
3533         }
3534
3535         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3536                 settings->cipher_group =
3537                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3538                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3539                         return -EINVAL;
3540         }
3541
3542         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3543                 settings->wpa_versions =
3544                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3545                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3546                         return -EINVAL;
3547         }
3548
3549         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3550                 void *data;
3551                 int len, i;
3552
3553                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3554                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3555                 settings->n_akm_suites = len / sizeof(u32);
3556
3557                 if (len % sizeof(u32))
3558                         return -EINVAL;
3559
3560                 memcpy(settings->akm_suites, data, len);
3561
3562                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3563                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3564                                 return -EINVAL;
3565         }
3566
3567         return 0;
3568 }
3569
3570 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3571 {
3572         struct cfg80211_registered_device *rdev;
3573         struct net_device *dev;
3574         struct wireless_dev *wdev;
3575         struct cfg80211_crypto_settings crypto;
3576         struct ieee80211_channel *chan, *fixedchan;
3577         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3578         int err, ssid_len, ie_len = 0;
3579         bool use_mfp = false;
3580
3581         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3582                 return -EINVAL;
3583
3584         if (!info->attrs[NL80211_ATTR_MAC] ||
3585             !info->attrs[NL80211_ATTR_SSID] ||
3586             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3587                 return -EINVAL;
3588
3589         rtnl_lock();
3590
3591         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3592         if (err)
3593                 goto unlock_rtnl;
3594
3595         if (!rdev->ops->assoc) {
3596                 err = -EOPNOTSUPP;
3597                 goto out;
3598         }
3599
3600         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3601                 err = -EOPNOTSUPP;
3602                 goto out;
3603         }
3604
3605         if (!netif_running(dev)) {
3606                 err = -ENETDOWN;
3607                 goto out;
3608         }
3609
3610         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3611
3612         chan = ieee80211_get_channel(&rdev->wiphy,
3613                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3614         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3615                 err = -EINVAL;
3616                 goto out;
3617         }
3618
3619         mutex_lock(&rdev->devlist_mtx);
3620         wdev = dev->ieee80211_ptr;
3621         fixedchan = rdev_fixed_channel(rdev, wdev);
3622         if (fixedchan && chan != fixedchan) {
3623                 err = -EBUSY;
3624                 mutex_unlock(&rdev->devlist_mtx);
3625                 goto out;
3626         }
3627         mutex_unlock(&rdev->devlist_mtx);
3628
3629         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3630         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3631
3632         if (info->attrs[NL80211_ATTR_IE]) {
3633                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3634                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3635         }
3636
3637         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3638                 enum nl80211_mfp mfp =
3639                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3640                 if (mfp == NL80211_MFP_REQUIRED)
3641                         use_mfp = true;
3642                 else if (mfp != NL80211_MFP_NO) {
3643                         err = -EINVAL;
3644                         goto out;
3645                 }
3646         }
3647
3648         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3649                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3650
3651         err = nl80211_crypto_settings(info, &crypto, 1);
3652         if (!err)
3653                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3654                                           ssid, ssid_len, ie, ie_len, use_mfp,
3655                                           &crypto);
3656
3657 out:
3658         cfg80211_unlock_rdev(rdev);
3659         dev_put(dev);
3660 unlock_rtnl:
3661         rtnl_unlock();
3662         return err;
3663 }
3664
3665 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3666 {
3667         struct cfg80211_registered_device *rdev;
3668         struct net_device *dev;
3669         const u8 *ie = NULL, *bssid;
3670         int err, ie_len = 0;
3671         u16 reason_code;
3672
3673         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3674                 return -EINVAL;
3675
3676         if (!info->attrs[NL80211_ATTR_MAC])
3677                 return -EINVAL;
3678
3679         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3680                 return -EINVAL;
3681
3682         rtnl_lock();
3683
3684         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3685         if (err)
3686                 goto unlock_rtnl;
3687
3688         if (!rdev->ops->deauth) {
3689                 err = -EOPNOTSUPP;
3690                 goto out;
3691         }
3692
3693         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3694                 err = -EOPNOTSUPP;
3695                 goto out;
3696         }
3697
3698         if (!netif_running(dev)) {
3699                 err = -ENETDOWN;
3700                 goto out;
3701         }
3702
3703         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3704
3705         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3706         if (reason_code == 0) {
3707                 /* Reason Code 0 is reserved */
3708                 err = -EINVAL;
3709                 goto out;
3710         }
3711
3712         if (info->attrs[NL80211_ATTR_IE]) {
3713                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3714                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3715         }
3716
3717         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3718
3719 out:
3720         cfg80211_unlock_rdev(rdev);
3721         dev_put(dev);
3722 unlock_rtnl:
3723         rtnl_unlock();
3724         return err;
3725 }
3726
3727 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3728 {
3729         struct cfg80211_registered_device *rdev;
3730         struct net_device *dev;
3731         const u8 *ie = NULL, *bssid;
3732         int err, ie_len = 0;
3733         u16 reason_code;
3734
3735         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3736                 return -EINVAL;
3737
3738         if (!info->attrs[NL80211_ATTR_MAC])
3739                 return -EINVAL;
3740
3741         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3742                 return -EINVAL;
3743
3744         rtnl_lock();
3745
3746         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3747         if (err)
3748                 goto unlock_rtnl;
3749
3750         if (!rdev->ops->disassoc) {
3751                 err = -EOPNOTSUPP;
3752                 goto out;
3753         }
3754
3755         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3756                 err = -EOPNOTSUPP;
3757                 goto out;
3758         }
3759
3760         if (!netif_running(dev)) {
3761                 err = -ENETDOWN;
3762                 goto out;
3763         }
3764
3765         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3766
3767         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3768         if (reason_code == 0) {
3769                 /* Reason Code 0 is reserved */
3770                 err = -EINVAL;
3771                 goto out;
3772         }
3773
3774         if (info->attrs[NL80211_ATTR_IE]) {
3775                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3776                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3777         }
3778
3779         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3780
3781 out:
3782         cfg80211_unlock_rdev(rdev);
3783         dev_put(dev);
3784 unlock_rtnl:
3785         rtnl_unlock();
3786         return err;
3787 }
3788
3789 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3790 {
3791         struct cfg80211_registered_device *rdev;
3792         struct net_device *dev;
3793         struct cfg80211_ibss_params ibss;
3794         struct wiphy *wiphy;
3795         struct cfg80211_cached_keys *connkeys = NULL;
3796         int err;
3797
3798         memset(&ibss, 0, sizeof(ibss));
3799
3800         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3801                 return -EINVAL;
3802
3803         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3804             !info->attrs[NL80211_ATTR_SSID] ||
3805             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3806                 return -EINVAL;
3807
3808         ibss.beacon_interval = 100;
3809
3810         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3811                 ibss.beacon_interval =
3812                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3813                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3814                         return -EINVAL;
3815         }
3816
3817         rtnl_lock();
3818
3819         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3820         if (err)
3821                 goto unlock_rtnl;
3822
3823         if (!rdev->ops->join_ibss) {
3824                 err = -EOPNOTSUPP;
3825                 goto out;
3826         }
3827
3828         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3829                 err = -EOPNOTSUPP;
3830                 goto out;
3831         }
3832
3833         if (!netif_running(dev)) {
3834                 err = -ENETDOWN;
3835                 goto out;
3836         }
3837
3838         wiphy = &rdev->wiphy;
3839
3840         if (info->attrs[NL80211_ATTR_MAC])
3841                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3842         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3843         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3844
3845         if (info->attrs[NL80211_ATTR_IE]) {
3846                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3847                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3848         }
3849
3850         ibss.channel = ieee80211_get_channel(wiphy,
3851                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3852         if (!ibss.channel ||
3853             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3854             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3855                 err = -EINVAL;
3856                 goto out;
3857         }
3858
3859         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3860         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3861
3862         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3863                 connkeys = nl80211_parse_connkeys(rdev,
3864                                         info->attrs[NL80211_ATTR_KEYS]);
3865                 if (IS_ERR(connkeys)) {
3866                         err = PTR_ERR(connkeys);
3867                         connkeys = NULL;
3868                         goto out;
3869                 }
3870         }
3871
3872         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3873
3874 out:
3875         cfg80211_unlock_rdev(rdev);
3876         dev_put(dev);
3877 unlock_rtnl:
3878         if (err)
3879                 kfree(connkeys);
3880         rtnl_unlock();
3881         return err;
3882 }
3883
3884 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3885 {
3886         struct cfg80211_registered_device *rdev;
3887         struct net_device *dev;
3888         int err;
3889
3890         rtnl_lock();
3891
3892         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3893         if (err)
3894                 goto unlock_rtnl;
3895
3896         if (!rdev->ops->leave_ibss) {
3897                 err = -EOPNOTSUPP;
3898                 goto out;
3899         }
3900
3901         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3902                 err = -EOPNOTSUPP;
3903                 goto out;
3904         }
3905
3906         if (!netif_running(dev)) {
3907                 err = -ENETDOWN;
3908                 goto out;
3909         }
3910
3911         err = cfg80211_leave_ibss(rdev, dev, false);
3912
3913 out:
3914         cfg80211_unlock_rdev(rdev);
3915         dev_put(dev);
3916 unlock_rtnl:
3917         rtnl_unlock();
3918         return err;
3919 }
3920
3921 #ifdef CONFIG_NL80211_TESTMODE
3922 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3923         .name = "testmode",
3924 };
3925
3926 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3927 {
3928         struct cfg80211_registered_device *rdev;
3929         int err;
3930
3931         if (!info->attrs[NL80211_ATTR_TESTDATA])
3932                 return -EINVAL;
3933
3934         rtnl_lock();
3935
3936         rdev = cfg80211_get_dev_from_info(info);
3937         if (IS_ERR(rdev)) {
3938                 err = PTR_ERR(rdev);
3939                 goto unlock_rtnl;
3940         }
3941
3942         err = -EOPNOTSUPP;
3943         if (rdev->ops->testmode_cmd) {
3944                 rdev->testmode_info = info;
3945                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3946                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3947                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3948                 rdev->testmode_info = NULL;
3949         }
3950
3951         cfg80211_unlock_rdev(rdev);
3952
3953  unlock_rtnl:
3954         rtnl_unlock();
3955         return err;
3956 }
3957
3958 static struct sk_buff *
3959 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3960                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3961 {
3962         struct sk_buff *skb;
3963         void *hdr;
3964         struct nlattr *data;
3965
3966         skb = nlmsg_new(approxlen + 100, gfp);
3967         if (!skb)
3968                 return NULL;
3969
3970         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3971         if (!hdr) {
3972                 kfree_skb(skb);
3973                 return NULL;
3974         }
3975
3976         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3977         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3978
3979         ((void **)skb->cb)[0] = rdev;
3980         ((void **)skb->cb)[1] = hdr;
3981         ((void **)skb->cb)[2] = data;
3982
3983         return skb;
3984
3985  nla_put_failure:
3986         kfree_skb(skb);
3987         return NULL;
3988 }
3989
3990 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3991                                                   int approxlen)
3992 {
3993         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3994
3995         if (WARN_ON(!rdev->testmode_info))
3996                 return NULL;
3997
3998         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3999                                 rdev->testmode_info->snd_pid,
4000                                 rdev->testmode_info->snd_seq,
4001                                 GFP_KERNEL);
4002 }
4003 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4004
4005 int cfg80211_testmode_reply(struct sk_buff *skb)
4006 {
4007         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4008         void *hdr = ((void **)skb->cb)[1];
4009         struct nlattr *data = ((void **)skb->cb)[2];
4010
4011         if (WARN_ON(!rdev->testmode_info)) {
4012                 kfree_skb(skb);
4013                 return -EINVAL;
4014         }
4015
4016         nla_nest_end(skb, data);
4017         genlmsg_end(skb, hdr);
4018         return genlmsg_reply(skb, rdev->testmode_info);
4019 }
4020 EXPORT_SYMBOL(cfg80211_testmode_reply);
4021
4022 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4023                                                   int approxlen, gfp_t gfp)
4024 {
4025         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4026
4027         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4028 }
4029 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4030
4031 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4032 {
4033         void *hdr = ((void **)skb->cb)[1];
4034         struct nlattr *data = ((void **)skb->cb)[2];
4035
4036         nla_nest_end(skb, data);
4037         genlmsg_end(skb, hdr);
4038         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4039 }
4040 EXPORT_SYMBOL(cfg80211_testmode_event);
4041 #endif
4042
4043 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4044 {
4045         struct cfg80211_registered_device *rdev;
4046         struct net_device *dev;
4047         struct cfg80211_connect_params connect;
4048         struct wiphy *wiphy;
4049         struct cfg80211_cached_keys *connkeys = NULL;
4050         int err;
4051
4052         memset(&connect, 0, sizeof(connect));
4053
4054         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4055                 return -EINVAL;
4056
4057         if (!info->attrs[NL80211_ATTR_SSID] ||
4058             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4059                 return -EINVAL;
4060
4061         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4062                 connect.auth_type =
4063                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4064                 if (!nl80211_valid_auth_type(connect.auth_type))
4065                         return -EINVAL;
4066         } else
4067                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4068
4069         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4070
4071         err = nl80211_crypto_settings(info, &connect.crypto,
4072                                       NL80211_MAX_NR_CIPHER_SUITES);
4073         if (err)
4074                 return err;
4075         rtnl_lock();
4076
4077         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4078         if (err)
4079                 goto unlock_rtnl;
4080
4081         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4082                 err = -EOPNOTSUPP;
4083                 goto out;
4084         }
4085
4086         if (!netif_running(dev)) {
4087                 err = -ENETDOWN;
4088                 goto out;
4089         }
4090
4091         wiphy = &rdev->wiphy;
4092
4093         if (info->attrs[NL80211_ATTR_MAC])
4094                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4095         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4096         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4097
4098         if (info->attrs[NL80211_ATTR_IE]) {
4099                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4100                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4101         }
4102
4103         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4104                 connect.channel =
4105                         ieee80211_get_channel(wiphy,
4106                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4107                 if (!connect.channel ||
4108                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4109                         err = -EINVAL;
4110                         goto out;
4111                 }
4112         }
4113
4114         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4115                 connkeys = nl80211_parse_connkeys(rdev,
4116                                         info->attrs[NL80211_ATTR_KEYS]);
4117                 if (IS_ERR(connkeys)) {
4118                         err = PTR_ERR(connkeys);
4119                         connkeys = NULL;
4120                         goto out;
4121                 }
4122         }
4123
4124         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4125
4126 out:
4127         cfg80211_unlock_rdev(rdev);
4128         dev_put(dev);
4129 unlock_rtnl:
4130         if (err)
4131                 kfree(connkeys);
4132         rtnl_unlock();
4133         return err;
4134 }
4135
4136 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4137 {
4138         struct cfg80211_registered_device *rdev;
4139         struct net_device *dev;
4140         int err;
4141         u16 reason;
4142
4143         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4144                 reason = WLAN_REASON_DEAUTH_LEAVING;
4145         else
4146                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4147
4148         if (reason == 0)
4149                 return -EINVAL;
4150
4151         rtnl_lock();
4152
4153         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4154         if (err)
4155                 goto unlock_rtnl;
4156
4157         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4158                 err = -EOPNOTSUPP;
4159                 goto out;
4160         }
4161
4162         if (!netif_running(dev)) {
4163                 err = -ENETDOWN;
4164                 goto out;
4165         }
4166
4167         err = cfg80211_disconnect(rdev, dev, reason, true);
4168
4169 out:
4170         cfg80211_unlock_rdev(rdev);
4171         dev_put(dev);
4172 unlock_rtnl:
4173         rtnl_unlock();
4174         return err;
4175 }
4176
4177 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4178 {
4179         struct cfg80211_registered_device *rdev;
4180         struct net *net;
4181         int err;
4182         u32 pid;
4183
4184         if (!info->attrs[NL80211_ATTR_PID])
4185                 return -EINVAL;
4186
4187         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4188
4189         rtnl_lock();
4190
4191         rdev = cfg80211_get_dev_from_info(info);
4192         if (IS_ERR(rdev)) {
4193                 err = PTR_ERR(rdev);
4194                 goto out_rtnl;
4195         }
4196
4197         net = get_net_ns_by_pid(pid);
4198         if (IS_ERR(net)) {
4199                 err = PTR_ERR(net);
4200                 goto out;
4201         }
4202
4203         err = 0;
4204
4205         /* check if anything to do */
4206         if (net_eq(wiphy_net(&rdev->wiphy), net))
4207                 goto out_put_net;
4208
4209         err = cfg80211_switch_netns(rdev, net);
4210  out_put_net:
4211         put_net(net);
4212  out:
4213         cfg80211_unlock_rdev(rdev);
4214  out_rtnl:
4215         rtnl_unlock();
4216         return err;
4217 }
4218
4219 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4220 {
4221         struct cfg80211_registered_device *rdev;
4222         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4223                         struct cfg80211_pmksa *pmksa) = NULL;
4224         int err;
4225         struct net_device *dev;
4226         struct cfg80211_pmksa pmksa;
4227
4228         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4229
4230         if (!info->attrs[NL80211_ATTR_MAC])
4231                 return -EINVAL;
4232
4233         if (!info->attrs[NL80211_ATTR_PMKID])
4234                 return -EINVAL;
4235
4236         rtnl_lock();
4237
4238         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4239         if (err)
4240                 goto out_rtnl;
4241
4242         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4243         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4244
4245         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4246                 err = -EOPNOTSUPP;
4247                 goto out;
4248         }
4249
4250         switch (info->genlhdr->cmd) {
4251         case NL80211_CMD_SET_PMKSA:
4252                 rdev_ops = rdev->ops->set_pmksa;
4253                 break;
4254         case NL80211_CMD_DEL_PMKSA:
4255                 rdev_ops = rdev->ops->del_pmksa;
4256                 break;
4257         default:
4258                 WARN_ON(1);
4259                 break;
4260         }
4261
4262         if (!rdev_ops) {
4263                 err = -EOPNOTSUPP;
4264                 goto out;
4265         }
4266
4267         err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4268
4269  out:
4270         cfg80211_unlock_rdev(rdev);
4271         dev_put(dev);
4272  out_rtnl:
4273         rtnl_unlock();
4274
4275         return err;
4276 }
4277
4278 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4279 {
4280         struct cfg80211_registered_device *rdev;
4281         int err;
4282         struct net_device *dev;
4283
4284         rtnl_lock();
4285
4286         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4287         if (err)
4288                 goto out_rtnl;
4289
4290         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4291                 err = -EOPNOTSUPP;
4292                 goto out;
4293         }
4294
4295         if (!rdev->ops->flush_pmksa) {
4296                 err = -EOPNOTSUPP;
4297                 goto out;
4298         }
4299
4300         err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4301
4302  out:
4303         cfg80211_unlock_rdev(rdev);
4304         dev_put(dev);
4305  out_rtnl:
4306         rtnl_unlock();
4307
4308         return err;
4309
4310 }
4311
4312 static int nl80211_remain_on_channel(struct sk_buff *skb,
4313                                      struct genl_info *info)
4314 {
4315         struct cfg80211_registered_device *rdev;
4316         struct net_device *dev;
4317         struct ieee80211_channel *chan;
4318         struct sk_buff *msg;
4319         void *hdr;
4320         u64 cookie;
4321         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4322         u32 freq, duration;
4323         int err;
4324
4325         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4326             !info->attrs[NL80211_ATTR_DURATION])
4327                 return -EINVAL;
4328
4329         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4330
4331         /*
4332          * We should be on that channel for at least one jiffie,
4333          * and more than 5 seconds seems excessive.
4334          */
4335         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4336                 return -EINVAL;
4337
4338         rtnl_lock();
4339
4340         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4341         if (err)
4342                 goto unlock_rtnl;
4343
4344         if (!rdev->ops->remain_on_channel) {
4345                 err = -EOPNOTSUPP;
4346                 goto out;
4347         }
4348
4349         if (!netif_running(dev)) {
4350                 err = -ENETDOWN;
4351                 goto out;
4352         }
4353
4354         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4355                 channel_type = nla_get_u32(
4356                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4357                 if (channel_type != NL80211_CHAN_NO_HT &&
4358                     channel_type != NL80211_CHAN_HT20 &&
4359                     channel_type != NL80211_CHAN_HT40PLUS &&
4360                     channel_type != NL80211_CHAN_HT40MINUS)
4361                         err = -EINVAL;
4362                         goto out;
4363         }
4364
4365         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4366         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4367         if (chan == NULL) {
4368                 err = -EINVAL;
4369                 goto out;
4370         }
4371
4372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4373         if (!msg) {
4374                 err = -ENOMEM;
4375                 goto out;
4376         }
4377
4378         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4379                              NL80211_CMD_REMAIN_ON_CHANNEL);
4380
4381         if (IS_ERR(hdr)) {
4382                 err = PTR_ERR(hdr);
4383                 goto free_msg;
4384         }
4385
4386         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4387                                            channel_type, duration, &cookie);
4388
4389         if (err)
4390                 goto free_msg;
4391
4392         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4393
4394         genlmsg_end(msg, hdr);
4395         err = genlmsg_reply(msg, info);
4396         goto out;
4397
4398  nla_put_failure:
4399         err = -ENOBUFS;
4400  free_msg:
4401         nlmsg_free(msg);
4402  out:
4403         cfg80211_unlock_rdev(rdev);
4404         dev_put(dev);
4405  unlock_rtnl:
4406         rtnl_unlock();
4407         return err;
4408 }
4409
4410 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4411                                             struct genl_info *info)
4412 {
4413         struct cfg80211_registered_device *rdev;
4414         struct net_device *dev;
4415         u64 cookie;
4416         int err;
4417
4418         if (!info->attrs[NL80211_ATTR_COOKIE])
4419                 return -EINVAL;
4420
4421         rtnl_lock();
4422
4423         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4424         if (err)
4425                 goto unlock_rtnl;
4426
4427         if (!rdev->ops->cancel_remain_on_channel) {
4428                 err = -EOPNOTSUPP;
4429                 goto out;
4430         }
4431
4432         if (!netif_running(dev)) {
4433                 err = -ENETDOWN;
4434                 goto out;
4435         }
4436
4437         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4438
4439         err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4440
4441  out:
4442         cfg80211_unlock_rdev(rdev);
4443         dev_put(dev);
4444  unlock_rtnl:
4445         rtnl_unlock();
4446         return err;
4447 }
4448
4449 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4450                            u8 *rates, u8 rates_len)
4451 {
4452         u8 i;
4453         u32 mask = 0;
4454
4455         for (i = 0; i < rates_len; i++) {
4456                 int rate = (rates[i] & 0x7f) * 5;
4457                 int ridx;
4458                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4459                         struct ieee80211_rate *srate =
4460                                 &sband->bitrates[ridx];
4461                         if (rate == srate->bitrate) {
4462                                 mask |= 1 << ridx;
4463                                 break;
4464                         }
4465                 }
4466                 if (ridx == sband->n_bitrates)
4467                         return 0; /* rate not found */
4468         }
4469
4470         return mask;
4471 }
4472
4473 static struct nla_policy
4474 nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] __read_mostly = {
4475         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4476                                     .len = NL80211_MAX_SUPP_RATES },
4477 };
4478
4479 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4480                                        struct genl_info *info)
4481 {
4482         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4483         struct cfg80211_registered_device *rdev;
4484         struct cfg80211_bitrate_mask mask;
4485         int err, rem, i;
4486         struct net_device *dev;
4487         struct nlattr *tx_rates;
4488         struct ieee80211_supported_band *sband;
4489
4490         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4491                 return -EINVAL;
4492
4493         rtnl_lock();
4494
4495         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4496         if (err)
4497                 goto unlock_rtnl;
4498
4499         if (!rdev->ops->set_bitrate_mask) {
4500                 err = -EOPNOTSUPP;
4501                 goto unlock;
4502         }
4503
4504         memset(&mask, 0, sizeof(mask));
4505         /* Default to all rates enabled */
4506         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4507                 sband = rdev->wiphy.bands[i];
4508                 mask.control[i].legacy =
4509                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4510         }
4511
4512         /*
4513          * The nested attribute uses enum nl80211_band as the index. This maps
4514          * directly to the enum ieee80211_band values used in cfg80211.
4515          */
4516         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4517         {
4518                 enum ieee80211_band band = nla_type(tx_rates);
4519                 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4520                         err = -EINVAL;
4521                         goto unlock;
4522                 }
4523                 sband = rdev->wiphy.bands[band];
4524                 if (sband == NULL) {
4525                         err = -EINVAL;
4526                         goto unlock;
4527                 }
4528                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4529                           nla_len(tx_rates), nl80211_txattr_policy);
4530                 if (tb[NL80211_TXRATE_LEGACY]) {
4531                         mask.control[band].legacy = rateset_to_mask(
4532                                 sband,
4533                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4534                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4535                         if (mask.control[band].legacy == 0) {
4536                                 err = -EINVAL;
4537                                 goto unlock;
4538                         }
4539                 }
4540         }
4541
4542         err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4543
4544  unlock:
4545         dev_put(dev);
4546         cfg80211_unlock_rdev(rdev);
4547  unlock_rtnl:
4548         rtnl_unlock();
4549         return err;
4550 }
4551
4552 static struct genl_ops nl80211_ops[] = {
4553         {
4554                 .cmd = NL80211_CMD_GET_WIPHY,
4555                 .doit = nl80211_get_wiphy,
4556                 .dumpit = nl80211_dump_wiphy,
4557                 .policy = nl80211_policy,
4558                 /* can be retrieved by unprivileged users */
4559         },
4560         {
4561                 .cmd = NL80211_CMD_SET_WIPHY,
4562                 .doit = nl80211_set_wiphy,
4563                 .policy = nl80211_policy,
4564                 .flags = GENL_ADMIN_PERM,
4565         },
4566         {
4567                 .cmd = NL80211_CMD_GET_INTERFACE,
4568                 .doit = nl80211_get_interface,
4569                 .dumpit = nl80211_dump_interface,
4570                 .policy = nl80211_policy,
4571                 /* can be retrieved by unprivileged users */
4572         },
4573         {
4574                 .cmd = NL80211_CMD_SET_INTERFACE,
4575                 .doit = nl80211_set_interface,
4576                 .policy = nl80211_policy,
4577                 .flags = GENL_ADMIN_PERM,
4578         },
4579         {
4580                 .cmd = NL80211_CMD_NEW_INTERFACE,
4581                 .doit = nl80211_new_interface,
4582                 .policy = nl80211_policy,
4583                 .flags = GENL_ADMIN_PERM,
4584         },
4585         {
4586                 .cmd = NL80211_CMD_DEL_INTERFACE,
4587                 .doit = nl80211_del_interface,
4588                 .policy = nl80211_policy,
4589                 .flags = GENL_ADMIN_PERM,
4590         },
4591         {
4592                 .cmd = NL80211_CMD_GET_KEY,
4593                 .doit = nl80211_get_key,
4594                 .policy = nl80211_policy,
4595                 .flags = GENL_ADMIN_PERM,
4596         },
4597         {
4598                 .cmd = NL80211_CMD_SET_KEY,
4599                 .doit = nl80211_set_key,
4600                 .policy = nl80211_policy,
4601                 .flags = GENL_ADMIN_PERM,
4602         },
4603         {
4604                 .cmd = NL80211_CMD_NEW_KEY,
4605                 .doit = nl80211_new_key,
4606                 .policy = nl80211_policy,
4607                 .flags = GENL_ADMIN_PERM,
4608         },
4609         {
4610                 .cmd = NL80211_CMD_DEL_KEY,
4611                 .doit = nl80211_del_key,
4612                 .policy = nl80211_policy,
4613                 .flags = GENL_ADMIN_PERM,
4614         },
4615         {
4616                 .cmd = NL80211_CMD_SET_BEACON,
4617                 .policy = nl80211_policy,
4618                 .flags = GENL_ADMIN_PERM,
4619                 .doit = nl80211_addset_beacon,
4620         },
4621         {
4622                 .cmd = NL80211_CMD_NEW_BEACON,
4623                 .policy = nl80211_policy,
4624                 .flags = GENL_ADMIN_PERM,
4625                 .doit = nl80211_addset_beacon,
4626         },
4627         {
4628                 .cmd = NL80211_CMD_DEL_BEACON,
4629                 .policy = nl80211_policy,
4630                 .flags = GENL_ADMIN_PERM,
4631                 .doit = nl80211_del_beacon,
4632         },
4633         {
4634                 .cmd = NL80211_CMD_GET_STATION,
4635                 .doit = nl80211_get_station,
4636                 .dumpit = nl80211_dump_station,
4637                 .policy = nl80211_policy,
4638         },
4639         {
4640                 .cmd = NL80211_CMD_SET_STATION,
4641                 .doit = nl80211_set_station,
4642                 .policy = nl80211_policy,
4643                 .flags = GENL_ADMIN_PERM,
4644         },
4645         {
4646                 .cmd = NL80211_CMD_NEW_STATION,
4647                 .doit = nl80211_new_station,
4648                 .policy = nl80211_policy,
4649                 .flags = GENL_ADMIN_PERM,
4650         },
4651         {
4652                 .cmd = NL80211_CMD_DEL_STATION,
4653                 .doit = nl80211_del_station,
4654                 .policy = nl80211_policy,
4655                 .flags = GENL_ADMIN_PERM,
4656         },
4657         {
4658                 .cmd = NL80211_CMD_GET_MPATH,
4659                 .doit = nl80211_get_mpath,
4660                 .dumpit = nl80211_dump_mpath,
4661                 .policy = nl80211_policy,
4662                 .flags = GENL_ADMIN_PERM,
4663         },
4664         {
4665                 .cmd = NL80211_CMD_SET_MPATH,
4666                 .doit = nl80211_set_mpath,
4667                 .policy = nl80211_policy,
4668                 .flags = GENL_ADMIN_PERM,
4669         },
4670         {
4671                 .cmd = NL80211_CMD_NEW_MPATH,
4672                 .doit = nl80211_new_mpath,
4673                 .policy = nl80211_policy,
4674                 .flags = GENL_ADMIN_PERM,
4675         },
4676         {
4677                 .cmd = NL80211_CMD_DEL_MPATH,
4678                 .doit = nl80211_del_mpath,
4679                 .policy = nl80211_policy,
4680                 .flags = GENL_ADMIN_PERM,
4681         },
4682         {
4683                 .cmd = NL80211_CMD_SET_BSS,
4684                 .doit = nl80211_set_bss,
4685                 .policy = nl80211_policy,
4686                 .flags = GENL_ADMIN_PERM,
4687         },
4688         {
4689                 .cmd = NL80211_CMD_GET_REG,
4690                 .doit = nl80211_get_reg,
4691                 .policy = nl80211_policy,
4692                 /* can be retrieved by unprivileged users */
4693         },
4694         {
4695                 .cmd = NL80211_CMD_SET_REG,
4696                 .doit = nl80211_set_reg,
4697                 .policy = nl80211_policy,
4698                 .flags = GENL_ADMIN_PERM,
4699         },
4700         {
4701                 .cmd = NL80211_CMD_REQ_SET_REG,
4702                 .doit = nl80211_req_set_reg,
4703                 .policy = nl80211_policy,
4704                 .flags = GENL_ADMIN_PERM,
4705         },
4706         {
4707                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4708                 .doit = nl80211_get_mesh_params,
4709                 .policy = nl80211_policy,
4710                 /* can be retrieved by unprivileged users */
4711         },
4712         {
4713                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4714                 .doit = nl80211_set_mesh_params,
4715                 .policy = nl80211_policy,
4716                 .flags = GENL_ADMIN_PERM,
4717         },
4718         {
4719                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4720                 .doit = nl80211_trigger_scan,
4721                 .policy = nl80211_policy,
4722                 .flags = GENL_ADMIN_PERM,
4723         },
4724         {
4725                 .cmd = NL80211_CMD_GET_SCAN,
4726                 .policy = nl80211_policy,
4727                 .dumpit = nl80211_dump_scan,
4728         },
4729         {
4730                 .cmd = NL80211_CMD_AUTHENTICATE,
4731                 .doit = nl80211_authenticate,
4732                 .policy = nl80211_policy,
4733                 .flags = GENL_ADMIN_PERM,
4734         },
4735         {
4736                 .cmd = NL80211_CMD_ASSOCIATE,
4737                 .doit = nl80211_associate,
4738                 .policy = nl80211_policy,
4739                 .flags = GENL_ADMIN_PERM,
4740         },
4741         {
4742                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4743                 .doit = nl80211_deauthenticate,
4744                 .policy = nl80211_policy,
4745                 .flags = GENL_ADMIN_PERM,
4746         },
4747         {
4748                 .cmd = NL80211_CMD_DISASSOCIATE,
4749                 .doit = nl80211_disassociate,
4750                 .policy = nl80211_policy,
4751                 .flags = GENL_ADMIN_PERM,
4752         },
4753         {
4754                 .cmd = NL80211_CMD_JOIN_IBSS,
4755                 .doit = nl80211_join_ibss,
4756                 .policy = nl80211_policy,
4757                 .flags = GENL_ADMIN_PERM,
4758         },
4759         {
4760                 .cmd = NL80211_CMD_LEAVE_IBSS,
4761                 .doit = nl80211_leave_ibss,
4762                 .policy = nl80211_policy,
4763                 .flags = GENL_ADMIN_PERM,
4764         },
4765 #ifdef CONFIG_NL80211_TESTMODE
4766         {
4767                 .cmd = NL80211_CMD_TESTMODE,
4768                 .doit = nl80211_testmode_do,
4769                 .policy = nl80211_policy,
4770                 .flags = GENL_ADMIN_PERM,
4771         },
4772 #endif
4773         {
4774                 .cmd = NL80211_CMD_CONNECT,
4775                 .doit = nl80211_connect,
4776                 .policy = nl80211_policy,
4777                 .flags = GENL_ADMIN_PERM,
4778         },
4779         {
4780                 .cmd = NL80211_CMD_DISCONNECT,
4781                 .doit = nl80211_disconnect,
4782                 .policy = nl80211_policy,
4783                 .flags = GENL_ADMIN_PERM,
4784         },
4785         {
4786                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
4787                 .doit = nl80211_wiphy_netns,
4788                 .policy = nl80211_policy,
4789                 .flags = GENL_ADMIN_PERM,
4790         },
4791         {
4792                 .cmd = NL80211_CMD_GET_SURVEY,
4793                 .policy = nl80211_policy,
4794                 .dumpit = nl80211_dump_survey,
4795         },
4796         {
4797                 .cmd = NL80211_CMD_SET_PMKSA,
4798                 .doit = nl80211_setdel_pmksa,
4799                 .policy = nl80211_policy,
4800                 .flags = GENL_ADMIN_PERM,
4801         },
4802         {
4803                 .cmd = NL80211_CMD_DEL_PMKSA,
4804                 .doit = nl80211_setdel_pmksa,
4805                 .policy = nl80211_policy,
4806                 .flags = GENL_ADMIN_PERM,
4807         },
4808         {
4809                 .cmd = NL80211_CMD_FLUSH_PMKSA,
4810                 .doit = nl80211_flush_pmksa,
4811                 .policy = nl80211_policy,
4812                 .flags = GENL_ADMIN_PERM,
4813         },
4814         {
4815                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
4816                 .doit = nl80211_remain_on_channel,
4817                 .policy = nl80211_policy,
4818                 .flags = GENL_ADMIN_PERM,
4819         },
4820         {
4821                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
4822                 .doit = nl80211_cancel_remain_on_channel,
4823                 .policy = nl80211_policy,
4824                 .flags = GENL_ADMIN_PERM,
4825         },
4826         {
4827                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
4828                 .doit = nl80211_set_tx_bitrate_mask,
4829                 .policy = nl80211_policy,
4830                 .flags = GENL_ADMIN_PERM,
4831         },
4832 };
4833
4834 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4835         .name = "mlme",
4836 };
4837
4838 /* multicast groups */
4839 static struct genl_multicast_group nl80211_config_mcgrp = {
4840         .name = "config",
4841 };
4842 static struct genl_multicast_group nl80211_scan_mcgrp = {
4843         .name = "scan",
4844 };
4845 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4846         .name = "regulatory",
4847 };
4848
4849 /* notification functions */
4850
4851 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4852 {
4853         struct sk_buff *msg;
4854
4855         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4856         if (!msg)
4857                 return;
4858
4859         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4860                 nlmsg_free(msg);
4861                 return;
4862         }
4863
4864         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4865                                 nl80211_config_mcgrp.id, GFP_KERNEL);
4866 }
4867
4868 static int nl80211_add_scan_req(struct sk_buff *msg,
4869                                 struct cfg80211_registered_device *rdev)
4870 {
4871         struct cfg80211_scan_request *req = rdev->scan_req;
4872         struct nlattr *nest;
4873         int i;
4874
4875         ASSERT_RDEV_LOCK(rdev);
4876
4877         if (WARN_ON(!req))
4878                 return 0;
4879
4880         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4881         if (!nest)
4882                 goto nla_put_failure;
4883         for (i = 0; i < req->n_ssids; i++)
4884                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4885         nla_nest_end(msg, nest);
4886
4887         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4888         if (!nest)
4889                 goto nla_put_failure;
4890         for (i = 0; i < req->n_channels; i++)
4891                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4892         nla_nest_end(msg, nest);
4893
4894         if (req->ie)
4895                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4896
4897         return 0;
4898  nla_put_failure:
4899         return -ENOBUFS;
4900 }
4901
4902 static int nl80211_send_scan_msg(struct sk_buff *msg,
4903                                  struct cfg80211_registered_device *rdev,
4904                                  struct net_device *netdev,
4905                                  u32 pid, u32 seq, int flags,
4906                                  u32 cmd)
4907 {
4908         void *hdr;
4909
4910         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4911         if (!hdr)
4912                 return -1;
4913
4914         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4915         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4916
4917         /* ignore errors and send incomplete event anyway */
4918         nl80211_add_scan_req(msg, rdev);
4919
4920         return genlmsg_end(msg, hdr);
4921
4922  nla_put_failure:
4923         genlmsg_cancel(msg, hdr);
4924         return -EMSGSIZE;
4925 }
4926
4927 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4928                              struct net_device *netdev)
4929 {
4930         struct sk_buff *msg;
4931
4932         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4933         if (!msg)
4934                 return;
4935
4936         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4937                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
4938                 nlmsg_free(msg);
4939                 return;
4940         }
4941
4942         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4943                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4944 }
4945
4946 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4947                             struct net_device *netdev)
4948 {
4949         struct sk_buff *msg;
4950
4951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4952         if (!msg)
4953                 return;
4954
4955         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4956                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4957                 nlmsg_free(msg);
4958                 return;
4959         }
4960
4961         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4962                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4963 }
4964
4965 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4966                                struct net_device *netdev)
4967 {
4968         struct sk_buff *msg;
4969
4970         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4971         if (!msg)
4972                 return;
4973
4974         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4975                                   NL80211_CMD_SCAN_ABORTED) < 0) {
4976                 nlmsg_free(msg);
4977                 return;
4978         }
4979
4980         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
4981                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
4982 }
4983
4984 /*
4985  * This can happen on global regulatory changes or device specific settings
4986  * based on custom world regulatory domains.
4987  */
4988 void nl80211_send_reg_change_event(struct regulatory_request *request)
4989 {
4990         struct sk_buff *msg;
4991         void *hdr;
4992
4993         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4994         if (!msg)
4995                 return;
4996
4997         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
4998         if (!hdr) {
4999                 nlmsg_free(msg);
5000                 return;
5001         }
5002
5003         /* Userspace can always count this one always being set */
5004         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5005
5006         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5007                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5008                            NL80211_REGDOM_TYPE_WORLD);
5009         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5010                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5011                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5012         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5013                  request->intersect)
5014                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5015                            NL80211_REGDOM_TYPE_INTERSECTION);
5016         else {
5017                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5018                            NL80211_REGDOM_TYPE_COUNTRY);
5019                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5020         }
5021
5022         if (wiphy_idx_valid(request->wiphy_idx))
5023                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5024
5025         if (genlmsg_end(msg, hdr) < 0) {
5026                 nlmsg_free(msg);
5027                 return;
5028         }
5029
5030         rcu_read_lock();
5031         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5032                                 GFP_ATOMIC);
5033         rcu_read_unlock();
5034
5035         return;
5036
5037 nla_put_failure:
5038         genlmsg_cancel(msg, hdr);
5039         nlmsg_free(msg);
5040 }
5041
5042 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5043                                     struct net_device *netdev,
5044                                     const u8 *buf, size_t len,
5045                                     enum nl80211_commands cmd, gfp_t gfp)
5046 {
5047         struct sk_buff *msg;
5048         void *hdr;
5049
5050         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5051         if (!msg)
5052                 return;
5053
5054         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5055         if (!hdr) {
5056                 nlmsg_free(msg);
5057                 return;
5058         }
5059
5060         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5061         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5062         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5063
5064         if (genlmsg_end(msg, hdr) < 0) {
5065                 nlmsg_free(msg);
5066                 return;
5067         }
5068
5069         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5070                                 nl80211_mlme_mcgrp.id, gfp);
5071         return;
5072
5073  nla_put_failure:
5074         genlmsg_cancel(msg, hdr);
5075         nlmsg_free(msg);
5076 }
5077
5078 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5079                           struct net_device *netdev, const u8 *buf,
5080                           size_t len, gfp_t gfp)
5081 {
5082         nl80211_send_mlme_event(rdev, netdev, buf, len,
5083                                 NL80211_CMD_AUTHENTICATE, gfp);
5084 }
5085
5086 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5087                            struct net_device *netdev, const u8 *buf,
5088                            size_t len, gfp_t gfp)
5089 {
5090         nl80211_send_mlme_event(rdev, netdev, buf, len,
5091                                 NL80211_CMD_ASSOCIATE, gfp);
5092 }
5093
5094 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5095                          struct net_device *netdev, const u8 *buf,
5096                          size_t len, gfp_t gfp)
5097 {
5098         nl80211_send_mlme_event(rdev, netdev, buf, len,
5099                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5100 }
5101
5102 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5103                            struct net_device *netdev, const u8 *buf,
5104                            size_t len, gfp_t gfp)
5105 {
5106         nl80211_send_mlme_event(rdev, netdev, buf, len,
5107                                 NL80211_CMD_DISASSOCIATE, gfp);
5108 }
5109
5110 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5111                                       struct net_device *netdev, int cmd,
5112                                       const u8 *addr, gfp_t gfp)
5113 {
5114         struct sk_buff *msg;
5115         void *hdr;
5116
5117         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5118         if (!msg)
5119                 return;
5120
5121         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5122         if (!hdr) {
5123                 nlmsg_free(msg);
5124                 return;
5125         }
5126
5127         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5128         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5129         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5130         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5131
5132         if (genlmsg_end(msg, hdr) < 0) {
5133                 nlmsg_free(msg);
5134                 return;
5135         }
5136
5137         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5138                                 nl80211_mlme_mcgrp.id, gfp);
5139         return;
5140
5141  nla_put_failure:
5142         genlmsg_cancel(msg, hdr);
5143         nlmsg_free(msg);
5144 }
5145
5146 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5147                                struct net_device *netdev, const u8 *addr,
5148                                gfp_t gfp)
5149 {
5150         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5151                                   addr, gfp);
5152 }
5153
5154 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5155                                 struct net_device *netdev, const u8 *addr,
5156                                 gfp_t gfp)
5157 {
5158         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5159                                   addr, gfp);
5160 }
5161
5162 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5163                                  struct net_device *netdev, const u8 *bssid,
5164                                  const u8 *req_ie, size_t req_ie_len,
5165                                  const u8 *resp_ie, size_t resp_ie_len,
5166                                  u16 status, gfp_t gfp)
5167 {
5168         struct sk_buff *msg;
5169         void *hdr;
5170
5171         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5172         if (!msg)
5173                 return;
5174
5175         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5176         if (!hdr) {
5177                 nlmsg_free(msg);
5178                 return;
5179         }
5180
5181         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5182         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5183         if (bssid)
5184                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5185         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5186         if (req_ie)
5187                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5188         if (resp_ie)
5189                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5190
5191         if (genlmsg_end(msg, hdr) < 0) {
5192                 nlmsg_free(msg);
5193                 return;
5194         }
5195
5196         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5197                                 nl80211_mlme_mcgrp.id, gfp);
5198         return;
5199
5200  nla_put_failure:
5201         genlmsg_cancel(msg, hdr);
5202         nlmsg_free(msg);
5203
5204 }
5205
5206 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5207                          struct net_device *netdev, const u8 *bssid,
5208                          const u8 *req_ie, size_t req_ie_len,
5209                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5210 {
5211         struct sk_buff *msg;
5212         void *hdr;
5213
5214         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5215         if (!msg)
5216                 return;
5217
5218         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5219         if (!hdr) {
5220                 nlmsg_free(msg);
5221                 return;
5222         }
5223
5224         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5225         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5226         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5227         if (req_ie)
5228                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5229         if (resp_ie)
5230                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5231
5232         if (genlmsg_end(msg, hdr) < 0) {
5233                 nlmsg_free(msg);
5234                 return;
5235         }
5236
5237         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5238                                 nl80211_mlme_mcgrp.id, gfp);
5239         return;
5240
5241  nla_put_failure:
5242         genlmsg_cancel(msg, hdr);
5243         nlmsg_free(msg);
5244
5245 }
5246
5247 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5248                                struct net_device *netdev, u16 reason,
5249                                const u8 *ie, size_t ie_len, bool from_ap)
5250 {
5251         struct sk_buff *msg;
5252         void *hdr;
5253
5254         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5255         if (!msg)
5256                 return;
5257
5258         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5259         if (!hdr) {
5260                 nlmsg_free(msg);
5261                 return;
5262         }
5263
5264         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5265         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5266         if (from_ap && reason)
5267                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5268         if (from_ap)
5269                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5270         if (ie)
5271                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5272
5273         if (genlmsg_end(msg, hdr) < 0) {
5274                 nlmsg_free(msg);
5275                 return;
5276         }
5277
5278         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5279                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5280         return;
5281
5282  nla_put_failure:
5283         genlmsg_cancel(msg, hdr);
5284         nlmsg_free(msg);
5285
5286 }
5287
5288 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5289                              struct net_device *netdev, const u8 *bssid,
5290                              gfp_t gfp)
5291 {
5292         struct sk_buff *msg;
5293         void *hdr;
5294
5295         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5296         if (!msg)
5297                 return;
5298
5299         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5300         if (!hdr) {
5301                 nlmsg_free(msg);
5302                 return;
5303         }
5304
5305         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5306         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5307         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5308
5309         if (genlmsg_end(msg, hdr) < 0) {
5310                 nlmsg_free(msg);
5311                 return;
5312         }
5313
5314         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5315                                 nl80211_mlme_mcgrp.id, gfp);
5316         return;
5317
5318  nla_put_failure:
5319         genlmsg_cancel(msg, hdr);
5320         nlmsg_free(msg);
5321 }
5322
5323 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5324                                  struct net_device *netdev, const u8 *addr,
5325                                  enum nl80211_key_type key_type, int key_id,
5326                                  const u8 *tsc, gfp_t gfp)
5327 {
5328         struct sk_buff *msg;
5329         void *hdr;
5330
5331         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5332         if (!msg)
5333                 return;
5334
5335         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5336         if (!hdr) {
5337                 nlmsg_free(msg);
5338                 return;
5339         }
5340
5341         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5342         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5343         if (addr)
5344                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5345         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5346         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5347         if (tsc)
5348                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5349
5350         if (genlmsg_end(msg, hdr) < 0) {
5351                 nlmsg_free(msg);
5352                 return;
5353         }
5354
5355         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5356                                 nl80211_mlme_mcgrp.id, gfp);
5357         return;
5358
5359  nla_put_failure:
5360         genlmsg_cancel(msg, hdr);
5361         nlmsg_free(msg);
5362 }
5363
5364 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5365                                     struct ieee80211_channel *channel_before,
5366                                     struct ieee80211_channel *channel_after)
5367 {
5368         struct sk_buff *msg;
5369         void *hdr;
5370         struct nlattr *nl_freq;
5371
5372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5373         if (!msg)
5374                 return;
5375
5376         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5377         if (!hdr) {
5378                 nlmsg_free(msg);
5379                 return;
5380         }
5381
5382         /*
5383          * Since we are applying the beacon hint to a wiphy we know its
5384          * wiphy_idx is valid
5385          */
5386         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5387
5388         /* Before */
5389         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5390         if (!nl_freq)
5391                 goto nla_put_failure;
5392         if (nl80211_msg_put_channel(msg, channel_before))
5393                 goto nla_put_failure;
5394         nla_nest_end(msg, nl_freq);
5395
5396         /* After */
5397         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5398         if (!nl_freq)
5399                 goto nla_put_failure;
5400         if (nl80211_msg_put_channel(msg, channel_after))
5401                 goto nla_put_failure;
5402         nla_nest_end(msg, nl_freq);
5403
5404         if (genlmsg_end(msg, hdr) < 0) {
5405                 nlmsg_free(msg);
5406                 return;
5407         }
5408
5409         rcu_read_lock();
5410         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5411                                 GFP_ATOMIC);
5412         rcu_read_unlock();
5413
5414         return;
5415
5416 nla_put_failure:
5417         genlmsg_cancel(msg, hdr);
5418         nlmsg_free(msg);
5419 }
5420
5421 static void nl80211_send_remain_on_chan_event(
5422         int cmd, struct cfg80211_registered_device *rdev,
5423         struct net_device *netdev, u64 cookie,
5424         struct ieee80211_channel *chan,
5425         enum nl80211_channel_type channel_type,
5426         unsigned int duration, gfp_t gfp)
5427 {
5428         struct sk_buff *msg;
5429         void *hdr;
5430
5431         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5432         if (!msg)
5433                 return;
5434
5435         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5436         if (!hdr) {
5437                 nlmsg_free(msg);
5438                 return;
5439         }
5440
5441         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5442         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5443         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5444         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5445         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5446
5447         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5448                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5449
5450         if (genlmsg_end(msg, hdr) < 0) {
5451                 nlmsg_free(msg);
5452                 return;
5453         }
5454
5455         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5456                                 nl80211_mlme_mcgrp.id, gfp);
5457         return;
5458
5459  nla_put_failure:
5460         genlmsg_cancel(msg, hdr);
5461         nlmsg_free(msg);
5462 }
5463
5464 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5465                                     struct net_device *netdev, u64 cookie,
5466                                     struct ieee80211_channel *chan,
5467                                     enum nl80211_channel_type channel_type,
5468                                     unsigned int duration, gfp_t gfp)
5469 {
5470         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5471                                           rdev, netdev, cookie, chan,
5472                                           channel_type, duration, gfp);
5473 }
5474
5475 void nl80211_send_remain_on_channel_cancel(
5476         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5477         u64 cookie, struct ieee80211_channel *chan,
5478         enum nl80211_channel_type channel_type, gfp_t gfp)
5479 {
5480         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5481                                           rdev, netdev, cookie, chan,
5482                                           channel_type, 0, gfp);
5483 }
5484
5485 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5486                             struct net_device *dev, const u8 *mac_addr,
5487                             struct station_info *sinfo, gfp_t gfp)
5488 {
5489         struct sk_buff *msg;
5490
5491         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5492         if (!msg)
5493                 return;
5494
5495         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5496                 nlmsg_free(msg);
5497                 return;
5498         }
5499
5500         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5501                                 nl80211_mlme_mcgrp.id, gfp);
5502 }
5503
5504 /* initialisation/exit functions */
5505
5506 int nl80211_init(void)
5507 {
5508         int err;
5509
5510         err = genl_register_family_with_ops(&nl80211_fam,
5511                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
5512         if (err)
5513                 return err;
5514
5515         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
5516         if (err)
5517                 goto err_out;
5518
5519         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
5520         if (err)
5521                 goto err_out;
5522
5523         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
5524         if (err)
5525                 goto err_out;
5526
5527         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
5528         if (err)
5529                 goto err_out;
5530
5531 #ifdef CONFIG_NL80211_TESTMODE
5532         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
5533         if (err)
5534                 goto err_out;
5535 #endif
5536
5537         return 0;
5538  err_out:
5539         genl_unregister_family(&nl80211_fam);
5540         return err;
5541 }
5542
5543 void nl80211_exit(void)
5544 {
5545         genl_unregister_family(&nl80211_fam);
5546 }