net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  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/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 /* the netlink family */
  27 static struct genl_family nl80211_fam = {
  28         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  29         .name = "nl80211",      /* have users key off the name instead */
  30         .hdrsize = 0,           /* no private header */
  31         .version = 1,           /* no particular meaning now */
  32         .maxattr = NL80211_ATTR_MAX,
  33         .netnsok = true,
  34 };
  35
  36 /* internal helper: get rdev and dev */
  37 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  38                                        struct cfg80211_registered_device **rdev,
  39                                        struct net_device **dev)
  40 {
  41         struct nlattr **attrs = info->attrs;
  42         int ifindex;
  43
  44         if (!attrs[NL80211_ATTR_IFINDEX])
  45                 return -EINVAL;
  46
  47         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  48         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  49         if (!*dev)
  50                 return -ENODEV;
  51
  52         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  53         if (IS_ERR(*rdev)) {
  54                 dev_put(*dev);
  55                 return PTR_ERR(*rdev);
  56         }
  57
  58         return 0;
  59 }
  60
  61 /* policy for the attributes */
  62 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  63         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  64         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  65                                       .len = 20-1 },
  66         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  67         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  69         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  71         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  72         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  73         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  74
  75         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  77         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  78
  79         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  80         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  81
  82         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  83         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  84                                     .len = WLAN_MAX_KEY_LEN },
  85         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  86         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  87         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  88         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  89
  90         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  91         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  92         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  93                                        .len = IEEE80211_MAX_DATA_LEN },
  94         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  95                                        .len = IEEE80211_MAX_DATA_LEN },
  96         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  97         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  98         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  99         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 100                                                .len = NL80211_MAX_SUPP_RATES },
 101         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 102         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 103         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 104         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 105                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 106         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 107
 108         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 109         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 110
 111         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 113         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 114         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 115                                            .len = NL80211_MAX_SUPP_RATES },
 116
 117         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 120                                          .len = NL80211_HT_CAPABILITY_LEN },
 121
 122         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 123         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 124                               .len = IEEE80211_MAX_DATA_LEN },
 125         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 126         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 127
 128         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 129                                 .len = IEEE80211_MAX_SSID_LEN },
 130         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 131         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 132         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 134         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 135         [NL80211_ATTR_STA_FLAGS2] = {
 136                 .len = sizeof(struct nl80211_sta_flag_update),
 137         },
 138         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 139         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 140         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 141         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 142         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 143         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 144         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 145                                  .len = WLAN_PMKID_LEN },
 146         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 147         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 148         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 149         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 150                                  .len = IEEE80211_MAX_DATA_LEN },
 151         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 152         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 153         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 154         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 155         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 156 };
 157
 158 /* policy for the attributes */
 159 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 160         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 161         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 162         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 163         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 164         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 165         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 166 };
 167
 168 /* ifidx get helper */
 169 static int nl80211_get_ifidx(struct netlink_callback *cb)
 170 {
 171         int res;
 172
 173         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 174                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 175                           nl80211_policy);
 176         if (res)
 177                 return res;
 178
 179         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 180                 return -EINVAL;
 181
 182         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 183         if (!res)
 184                 return -EINVAL;
 185         return res;
 186 }
 187
 188 /* IE validation */
 189 static bool is_valid_ie_attr(const struct nlattr *attr)
 190 {
 191         const u8 *pos;
 192         int len;
 193
 194         if (!attr)
 195                 return true;
 196
 197         pos = nla_data(attr);
 198         len = nla_len(attr);
 199
 200         while (len) {
 201                 u8 elemlen;
 202
 203                 if (len < 2)
 204                         return false;
 205                 len -= 2;
 206
 207                 elemlen = pos[1];
 208                 if (elemlen > len)
 209                         return false;
 210
 211                 len -= elemlen;
 212                 pos += 2 + elemlen;
 213         }
 214
 215         return true;
 216 }
 217
 218 /* message building helper */
 219 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 220                                    int flags, u8 cmd)
 221 {
 222         /* since there is no private header just add the generic one */
 223         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 224 }
 225
 226 static int nl80211_msg_put_channel(struct sk_buff *msg,
 227                                    struct ieee80211_channel *chan)
 228 {
 229         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 230                     chan->center_freq);
 231
 232         if (chan->flags & IEEE80211_CHAN_DISABLED)
 233                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 234         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 235                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 236         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 237                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 238         if (chan->flags & IEEE80211_CHAN_RADAR)
 239                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 240
 241         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 242                     DBM_TO_MBM(chan->max_power));
 243
 244         return 0;
 245
 246  nla_put_failure:
 247         return -ENOBUFS;
 248 }
 249
 250 /* netlink command implementations */
 251
 252 struct key_parse {
 253         struct key_params p;
 254         int idx;
 255         bool def, defmgmt;
 256 };
 257
 258 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 259 {
 260         struct nlattr *tb[NL80211_KEY_MAX + 1];
 261         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 262                                    nl80211_key_policy);
 263         if (err)
 264                 return err;
 265
 266         k->def = !!tb[NL80211_KEY_DEFAULT];
 267         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 268
 269         if (tb[NL80211_KEY_IDX])
 270                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 271
 272         if (tb[NL80211_KEY_DATA]) {
 273                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 274                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 275         }
 276
 277         if (tb[NL80211_KEY_SEQ]) {
 278                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 279                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 280         }
 281
 282         if (tb[NL80211_KEY_CIPHER])
 283                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 284
 285         return 0;
 286 }
 287
 288 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 289 {
 290         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 291                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 292                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 293         }
 294
 295         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 296                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 297                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 298         }
 299
 300         if (info->attrs[NL80211_ATTR_KEY_IDX])
 301                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 302
 303         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 304                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 305
 306         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 307         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 308
 309         return 0;
 310 }
 311
 312 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 313 {
 314         int err;
 315
 316         memset(k, 0, sizeof(*k));
 317         k->idx = -1;
 318
 319         if (info->attrs[NL80211_ATTR_KEY])
 320                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 321         else
 322                 err = nl80211_parse_key_old(info, k);
 323
 324         if (err)
 325                 return err;
 326
 327         if (k->def && k->defmgmt)
 328                 return -EINVAL;
 329
 330         if (k->idx != -1) {
 331                 if (k->defmgmt) {
 332                         if (k->idx < 4 || k->idx > 5)
 333                                 return -EINVAL;
 334                 } else if (k->def) {
 335                         if (k->idx < 0 || k->idx > 3)
 336                                 return -EINVAL;
 337                 } else {
 338                         if (k->idx < 0 || k->idx > 5)
 339                                 return -EINVAL;
 340                 }
 341         }
 342
 343         return 0;
 344 }
 345
 346 static struct cfg80211_cached_keys *
 347 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 348                        struct nlattr *keys)
 349 {
 350         struct key_parse parse;
 351         struct nlattr *key;
 352         struct cfg80211_cached_keys *result;
 353         int rem, err, def = 0;
 354
 355         result = kzalloc(sizeof(*result), GFP_KERNEL);
 356         if (!result)
 357                 return ERR_PTR(-ENOMEM);
 358
 359         result->def = -1;
 360         result->defmgmt = -1;
 361
 362         nla_for_each_nested(key, keys, rem) {
 363                 memset(&parse, 0, sizeof(parse));
 364                 parse.idx = -1;
 365
 366                 err = nl80211_parse_key_new(key, &parse);
 367                 if (err)
 368                         goto error;
 369                 err = -EINVAL;
 370                 if (!parse.p.key)
 371                         goto error;
 372                 if (parse.idx < 0 || parse.idx > 4)
 373                         goto error;
 374                 if (parse.def) {
 375                         if (def)
 376                                 goto error;
 377                         def = 1;
 378                         result->def = parse.idx;
 379                 } else if (parse.defmgmt)
 380                         goto error;
 381                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 382                                                      parse.idx, NULL);
 383                 if (err)
 384                         goto error;
 385                 result->params[parse.idx].cipher = parse.p.cipher;
 386                 result->params[parse.idx].key_len = parse.p.key_len;
 387                 result->params[parse.idx].key = result->data[parse.idx];
 388                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 389         }
 390
 391         return result;
 392  error:
 393         kfree(result);
 394         return ERR_PTR(err);
 395 }
 396
 397 static int nl80211_key_allowed(struct wireless_dev *wdev)
 398 {
 399         ASSERT_WDEV_LOCK(wdev);
 400
 401         if (!netif_running(wdev->netdev))
 402                 return -ENETDOWN;
 403
 404         switch (wdev->iftype) {
 405         case NL80211_IFTYPE_AP:
 406         case NL80211_IFTYPE_AP_VLAN:
 407                 break;
 408         case NL80211_IFTYPE_ADHOC:
 409                 if (!wdev->current_bss)
 410                         return -ENOLINK;
 411                 break;
 412         case NL80211_IFTYPE_STATION:
 413                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 414                         return -ENOLINK;
 415                 break;
 416         default:
 417                 return -EINVAL;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 424                               struct cfg80211_registered_device *dev)
 425 {
 426         void *hdr;
 427         struct nlattr *nl_bands, *nl_band;
 428         struct nlattr *nl_freqs, *nl_freq;
 429         struct nlattr *nl_rates, *nl_rate;
 430         struct nlattr *nl_modes;
 431         struct nlattr *nl_cmds;
 432         enum ieee80211_band band;
 433         struct ieee80211_channel *chan;
 434         struct ieee80211_rate *rate;
 435         int i;
 436         u16 ifmodes = dev->wiphy.interface_modes;
 437
 438         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 439         if (!hdr)
 440                 return -1;
 441
 442         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 443         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 444
 445         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 446                     cfg80211_rdev_list_generation);
 447
 448         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 449                    dev->wiphy.retry_short);
 450         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 451                    dev->wiphy.retry_long);
 452         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 453                     dev->wiphy.frag_threshold);
 454         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 455                     dev->wiphy.rts_threshold);
 456         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 457                     dev->wiphy.coverage_class);
 458
 459         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 460                    dev->wiphy.max_scan_ssids);
 461         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 462                     dev->wiphy.max_scan_ie_len);
 463
 464         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 465                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 466                 dev->wiphy.cipher_suites);
 467
 468         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 469                    dev->wiphy.max_num_pmkids);
 470
 471         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 472         if (!nl_modes)
 473                 goto nla_put_failure;
 474
 475         i = 0;
 476         while (ifmodes) {
 477                 if (ifmodes & 1)
 478                         NLA_PUT_FLAG(msg, i);
 479                 ifmodes >>= 1;
 480                 i++;
 481         }
 482
 483         nla_nest_end(msg, nl_modes);
 484
 485         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 486         if (!nl_bands)
 487                 goto nla_put_failure;
 488
 489         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 490                 if (!dev->wiphy.bands[band])
 491                         continue;
 492
 493                 nl_band = nla_nest_start(msg, band);
 494                 if (!nl_band)
 495                         goto nla_put_failure;
 496
 497                 /* add HT info */
 498                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 499                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 500                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 501                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 502                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 503                                 dev->wiphy.bands[band]->ht_cap.cap);
 504                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 505                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 506                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 507                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 508                 }
 509
 510                 /* add frequencies */
 511                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 512                 if (!nl_freqs)
 513                         goto nla_put_failure;
 514
 515                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 516                         nl_freq = nla_nest_start(msg, i);
 517                         if (!nl_freq)
 518                                 goto nla_put_failure;
 519
 520                         chan = &dev->wiphy.bands[band]->channels[i];
 521
 522                         if (nl80211_msg_put_channel(msg, chan))
 523                                 goto nla_put_failure;
 524
 525                         nla_nest_end(msg, nl_freq);
 526                 }
 527
 528                 nla_nest_end(msg, nl_freqs);
 529
 530                 /* add bitrates */
 531                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 532                 if (!nl_rates)
 533                         goto nla_put_failure;
 534
 535                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 536                         nl_rate = nla_nest_start(msg, i);
 537                         if (!nl_rate)
 538                                 goto nla_put_failure;
 539
 540                         rate = &dev->wiphy.bands[band]->bitrates[i];
 541                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 542                                     rate->bitrate);
 543                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 544                                 NLA_PUT_FLAG(msg,
 545                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 546
 547                         nla_nest_end(msg, nl_rate);
 548                 }
 549
 550                 nla_nest_end(msg, nl_rates);
 551
 552                 nla_nest_end(msg, nl_band);
 553         }
 554         nla_nest_end(msg, nl_bands);
 555
 556         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 557         if (!nl_cmds)
 558                 goto nla_put_failure;
 559
 560         i = 0;
 561 #define CMD(op, n)                                              \
 562          do {                                                   \
 563                 if (dev->ops->op) {                             \
 564                         i++;                                    \
 565                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 566                 }                                               \
 567         } while (0)
 568
 569         CMD(add_virtual_intf, NEW_INTERFACE);
 570         CMD(change_virtual_intf, SET_INTERFACE);
 571         CMD(add_key, NEW_KEY);
 572         CMD(add_beacon, NEW_BEACON);
 573         CMD(add_station, NEW_STATION);
 574         CMD(add_mpath, NEW_MPATH);
 575         CMD(set_mesh_params, SET_MESH_PARAMS);
 576         CMD(change_bss, SET_BSS);
 577         CMD(auth, AUTHENTICATE);
 578         CMD(assoc, ASSOCIATE);
 579         CMD(deauth, DEAUTHENTICATE);
 580         CMD(disassoc, DISASSOCIATE);
 581         CMD(join_ibss, JOIN_IBSS);
 582         CMD(set_pmksa, SET_PMKSA);
 583         CMD(del_pmksa, DEL_PMKSA);
 584         CMD(flush_pmksa, FLUSH_PMKSA);
 585         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 586         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 587         CMD(action, ACTION);
 588         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 589                 i++;
 590                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 591         }
 592         CMD(set_channel, SET_CHANNEL);
 593
 594 #undef CMD
 595
 596         if (dev->ops->connect || dev->ops->auth) {
 597                 i++;
 598                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 599         }
 600
 601         if (dev->ops->disconnect || dev->ops->deauth) {
 602                 i++;
 603                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 604         }
 605
 606         nla_nest_end(msg, nl_cmds);
 607
 608         return genlmsg_end(msg, hdr);
 609
 610  nla_put_failure:
 611         genlmsg_cancel(msg, hdr);
 612         return -EMSGSIZE;
 613 }
 614
 615 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 616 {
 617         int idx = 0;
 618         int start = cb->args[0];
 619         struct cfg80211_registered_device *dev;
 620
 621         mutex_lock(&cfg80211_mutex);
 622         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 623                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 624                         continue;
 625                 if (++idx <= start)
 626                         continue;
 627                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 628                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 629                                        dev) < 0) {
 630                         idx--;
 631                         break;
 632                 }
 633         }
 634         mutex_unlock(&cfg80211_mutex);
 635
 636         cb->args[0] = idx;
 637
 638         return skb->len;
 639 }
 640
 641 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 642 {
 643         struct sk_buff *msg;
 644         struct cfg80211_registered_device *dev;
 645
 646         dev = cfg80211_get_dev_from_info(info);
 647         if (IS_ERR(dev))
 648                 return PTR_ERR(dev);
 649
 650         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 651         if (!msg)
 652                 goto out_err;
 653
 654         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 655                 goto out_free;
 656
 657         cfg80211_unlock_rdev(dev);
 658
 659         return genlmsg_reply(msg, info);
 660
 661  out_free:
 662         nlmsg_free(msg);
 663  out_err:
 664         cfg80211_unlock_rdev(dev);
 665         return -ENOBUFS;
 666 }
 667
 668 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 669         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 670         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 671         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 672         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 673         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 674 };
 675
 676 static int parse_txq_params(struct nlattr *tb[],
 677                             struct ieee80211_txq_params *txq_params)
 678 {
 679         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 680             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 681             !tb[NL80211_TXQ_ATTR_AIFS])
 682                 return -EINVAL;
 683
 684         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 685         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 686         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 687         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 688         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 689
 690         return 0;
 691 }
 692
 693 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 694 {
 695         /*
 696          * You can only set the channel explicitly for AP, mesh
 697          * and WDS type interfaces; all others have their channel
 698          * managed via their respective "establish a connection"
 699          * command (connect, join, ...)
 700          *
 701          * Monitors are special as they are normally slaved to
 702          * whatever else is going on, so they behave as though
 703          * you tried setting the wiphy channel itself.
 704          */
 705         return !wdev ||
 706                 wdev->iftype == NL80211_IFTYPE_AP ||
 707                 wdev->iftype == NL80211_IFTYPE_WDS ||
 708                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 709                 wdev->iftype == NL80211_IFTYPE_MONITOR;
 710 }
 711
 712 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 713                                  struct wireless_dev *wdev,
 714                                  struct genl_info *info)
 715 {
 716         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 717         u32 freq;
 718         int result;
 719
 720         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 721                 return -EINVAL;
 722
 723         if (!nl80211_can_set_dev_channel(wdev))
 724                 return -EOPNOTSUPP;
 725
 726         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 727                 channel_type = nla_get_u32(info->attrs[
 728                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 729                 if (channel_type != NL80211_CHAN_NO_HT &&
 730                     channel_type != NL80211_CHAN_HT20 &&
 731                     channel_type != NL80211_CHAN_HT40PLUS &&
 732                     channel_type != NL80211_CHAN_HT40MINUS)
 733                         return -EINVAL;
 734         }
 735
 736         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 737
 738         mutex_lock(&rdev->devlist_mtx);
 739         if (wdev) {
 740                 wdev_lock(wdev);
 741                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 742                 wdev_unlock(wdev);
 743         } else {
 744                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 745         }
 746         mutex_unlock(&rdev->devlist_mtx);
 747
 748         return result;
 749 }
 750
 751 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 752 {
 753         struct cfg80211_registered_device *rdev;
 754         struct net_device *netdev;
 755         int result;
 756
 757         rtnl_lock();
 758
 759         result = get_rdev_dev_by_info_ifindex(info, &rdev, &netdev);
 760         if (result)
 761                 goto unlock;
 762
 763         result = __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 764
 765  unlock:
 766         rtnl_unlock();
 767
 768         return result;
 769 }
 770
 771 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 772 {
 773         struct cfg80211_registered_device *rdev;
 774         struct net_device *netdev = NULL;
 775         struct wireless_dev *wdev;
 776         int result, rem_txq_params = 0;
 777         struct nlattr *nl_txq_params;
 778         u32 changed;
 779         u8 retry_short = 0, retry_long = 0;
 780         u32 frag_threshold = 0, rts_threshold = 0;
 781         u8 coverage_class = 0;
 782
 783         rtnl_lock();
 784
 785         /*
 786          * Try to find the wiphy and netdev. Normally this
 787          * function shouldn't need the netdev, but this is
 788          * done for backward compatibility -- previously
 789          * setting the channel was done per wiphy, but now
 790          * it is per netdev. Previous userland like hostapd
 791          * also passed a netdev to set_wiphy, so that it is
 792          * possible to let that go to the right netdev!
 793          */
 794         mutex_lock(&cfg80211_mutex);
 795
 796         if (info->attrs[NL80211_ATTR_IFINDEX]) {
 797                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
 798
 799                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
 800                 if (netdev && netdev->ieee80211_ptr) {
 801                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
 802                         mutex_lock(&rdev->mtx);
 803                 } else
 804                         netdev = NULL;
 805         }
 806
 807         if (!netdev) {
 808                 rdev = __cfg80211_rdev_from_info(info);
 809                 if (IS_ERR(rdev)) {
 810                         mutex_unlock(&cfg80211_mutex);
 811                         result = PTR_ERR(rdev);
 812                         goto unlock;
 813                 }
 814                 wdev = NULL;
 815                 netdev = NULL;
 816                 result = 0;
 817
 818                 mutex_lock(&rdev->mtx);
 819         } else if (netif_running(netdev) &&
 820                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
 821                 wdev = netdev->ieee80211_ptr;
 822         else
 823                 wdev = NULL;
 824
 825         /*
 826          * end workaround code, by now the rdev is available
 827          * and locked, and wdev may or may not be NULL.
 828          */
 829
 830         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 831                 result = cfg80211_dev_rename(
 832                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 833
 834         mutex_unlock(&cfg80211_mutex);
 835
 836         if (result)
 837                 goto bad_res;
 838
 839         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 840                 struct ieee80211_txq_params txq_params;
 841                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 842
 843                 if (!rdev->ops->set_txq_params) {
 844                         result = -EOPNOTSUPP;
 845                         goto bad_res;
 846                 }
 847
 848                 nla_for_each_nested(nl_txq_params,
 849                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 850                                     rem_txq_params) {
 851                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 852                                   nla_data(nl_txq_params),
 853                                   nla_len(nl_txq_params),
 854                                   txq_params_policy);
 855                         result = parse_txq_params(tb, &txq_params);
 856                         if (result)
 857                                 goto bad_res;
 858
 859                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 860                                                            &txq_params);
 861                         if (result)
 862                                 goto bad_res;
 863                 }
 864         }
 865
 866         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 867                 result = __nl80211_set_channel(rdev, wdev, info);
 868                 if (result)
 869                         goto bad_res;
 870         }
 871
 872         changed = 0;
 873
 874         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 875                 retry_short = nla_get_u8(
 876                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 877                 if (retry_short == 0) {
 878                         result = -EINVAL;
 879                         goto bad_res;
 880                 }
 881                 changed |= WIPHY_PARAM_RETRY_SHORT;
 882         }
 883
 884         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 885                 retry_long = nla_get_u8(
 886                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 887                 if (retry_long == 0) {
 888                         result = -EINVAL;
 889                         goto bad_res;
 890                 }
 891                 changed |= WIPHY_PARAM_RETRY_LONG;
 892         }
 893
 894         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 895                 frag_threshold = nla_get_u32(
 896                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 897                 if (frag_threshold < 256) {
 898                         result = -EINVAL;
 899                         goto bad_res;
 900                 }
 901                 if (frag_threshold != (u32) -1) {
 902                         /*
 903                          * Fragments (apart from the last one) are required to
 904                          * have even length. Make the fragmentation code
 905                          * simpler by stripping LSB should someone try to use
 906                          * odd threshold value.
 907                          */
 908                         frag_threshold &= ~0x1;
 909                 }
 910                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 911         }
 912
 913         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 914                 rts_threshold = nla_get_u32(
 915                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 916                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 917         }
 918
 919         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
 920                 coverage_class = nla_get_u8(
 921                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
 922                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
 923         }
 924
 925         if (changed) {
 926                 u8 old_retry_short, old_retry_long;
 927                 u32 old_frag_threshold, old_rts_threshold;
 928                 u8 old_coverage_class;
 929
 930                 if (!rdev->ops->set_wiphy_params) {
 931                         result = -EOPNOTSUPP;
 932                         goto bad_res;
 933                 }
 934
 935                 old_retry_short = rdev->wiphy.retry_short;
 936                 old_retry_long = rdev->wiphy.retry_long;
 937                 old_frag_threshold = rdev->wiphy.frag_threshold;
 938                 old_rts_threshold = rdev->wiphy.rts_threshold;
 939                 old_coverage_class = rdev->wiphy.coverage_class;
 940
 941                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 942                         rdev->wiphy.retry_short = retry_short;
 943                 if (changed & WIPHY_PARAM_RETRY_LONG)
 944                         rdev->wiphy.retry_long = retry_long;
 945                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 946                         rdev->wiphy.frag_threshold = frag_threshold;
 947                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 948                         rdev->wiphy.rts_threshold = rts_threshold;
 949                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
 950                         rdev->wiphy.coverage_class = coverage_class;
 951
 952                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 953                 if (result) {
 954                         rdev->wiphy.retry_short = old_retry_short;
 955                         rdev->wiphy.retry_long = old_retry_long;
 956                         rdev->wiphy.frag_threshold = old_frag_threshold;
 957                         rdev->wiphy.rts_threshold = old_rts_threshold;
 958                         rdev->wiphy.coverage_class = old_coverage_class;
 959                 }
 960         }
 961
 962  bad_res:
 963         mutex_unlock(&rdev->mtx);
 964         if (netdev)
 965                 dev_put(netdev);
 966  unlock:
 967         rtnl_unlock();
 968         return result;
 969 }
 970
 971
 972 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 973                               struct cfg80211_registered_device *rdev,
 974                               struct net_device *dev)
 975 {
 976         void *hdr;
 977
 978         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 979         if (!hdr)
 980                 return -1;
 981
 982         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 983         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 984         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 985         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 986
 987         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 988                     rdev->devlist_generation ^
 989                         (cfg80211_rdev_list_generation << 2));
 990
 991         return genlmsg_end(msg, hdr);
 992
 993  nla_put_failure:
 994         genlmsg_cancel(msg, hdr);
 995         return -EMSGSIZE;
 996 }
 997
 998 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 999 {
1000         int wp_idx = 0;
1001         int if_idx = 0;
1002         int wp_start = cb->args[0];
1003         int if_start = cb->args[1];
1004         struct cfg80211_registered_device *rdev;
1005         struct wireless_dev *wdev;
1006
1007         mutex_lock(&cfg80211_mutex);
1008         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1009                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1010                         continue;
1011                 if (wp_idx < wp_start) {
1012                         wp_idx++;
1013                         continue;
1014                 }
1015                 if_idx = 0;
1016
1017                 mutex_lock(&rdev->devlist_mtx);
1018                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1019                         if (if_idx < if_start) {
1020                                 if_idx++;
1021                                 continue;
1022                         }
1023                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1024                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1025                                                rdev, wdev->netdev) < 0) {
1026                                 mutex_unlock(&rdev->devlist_mtx);
1027                                 goto out;
1028                         }
1029                         if_idx++;
1030                 }
1031                 mutex_unlock(&rdev->devlist_mtx);
1032
1033                 wp_idx++;
1034         }
1035  out:
1036         mutex_unlock(&cfg80211_mutex);
1037
1038         cb->args[0] = wp_idx;
1039         cb->args[1] = if_idx;
1040
1041         return skb->len;
1042 }
1043
1044 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1045 {
1046         struct sk_buff *msg;
1047         struct cfg80211_registered_device *dev;
1048         struct net_device *netdev;
1049         int err;
1050
1051         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
1052         if (err)
1053                 return err;
1054
1055         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1056         if (!msg)
1057                 goto out_err;
1058
1059         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1060                                dev, netdev) < 0)
1061                 goto out_free;
1062
1063         dev_put(netdev);
1064         cfg80211_unlock_rdev(dev);
1065
1066         return genlmsg_reply(msg, info);
1067
1068  out_free:
1069         nlmsg_free(msg);
1070  out_err:
1071         dev_put(netdev);
1072         cfg80211_unlock_rdev(dev);
1073         return -ENOBUFS;
1074 }
1075
1076 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1077         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1078         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1079         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1080         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1081         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1082 };
1083
1084 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1085 {
1086         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1087         int flag;
1088
1089         *mntrflags = 0;
1090
1091         if (!nla)
1092                 return -EINVAL;
1093
1094         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1095                              nla, mntr_flags_policy))
1096                 return -EINVAL;
1097
1098         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1099                 if (flags[flag])
1100                         *mntrflags |= (1<<flag);
1101
1102         return 0;
1103 }
1104
1105 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1106                                struct net_device *netdev, u8 use_4addr,
1107                                enum nl80211_iftype iftype)
1108 {
1109         if (!use_4addr) {
1110                 if (netdev && netdev->br_port)
1111                         return -EBUSY;
1112                 return 0;
1113         }
1114
1115         switch (iftype) {
1116         case NL80211_IFTYPE_AP_VLAN:
1117                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1118                         return 0;
1119                 break;
1120         case NL80211_IFTYPE_STATION:
1121                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1122                         return 0;
1123                 break;
1124         default:
1125                 break;
1126         }
1127
1128         return -EOPNOTSUPP;
1129 }
1130
1131 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1132 {
1133         struct cfg80211_registered_device *rdev;
1134         struct vif_params params;
1135         int err;
1136         enum nl80211_iftype otype, ntype;
1137         struct net_device *dev;
1138         u32 _flags, *flags = NULL;
1139         bool change = false;
1140
1141         memset(&params, 0, sizeof(params));
1142
1143         rtnl_lock();
1144
1145         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1146         if (err)
1147                 goto unlock_rtnl;
1148
1149         otype = ntype = dev->ieee80211_ptr->iftype;
1150
1151         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1152                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1153                 if (otype != ntype)
1154                         change = true;
1155                 if (ntype > NL80211_IFTYPE_MAX) {
1156                         err = -EINVAL;
1157                         goto unlock;
1158                 }
1159         }
1160
1161         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1162                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1163                         err = -EINVAL;
1164                         goto unlock;
1165                 }
1166                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1167                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1168                 change = true;
1169         }
1170
1171         if (info->attrs[NL80211_ATTR_4ADDR]) {
1172                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1173                 change = true;
1174                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1175                 if (err)
1176                         goto unlock;
1177         } else {
1178                 params.use_4addr = -1;
1179         }
1180
1181         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1182                 if (ntype != NL80211_IFTYPE_MONITOR) {
1183                         err = -EINVAL;
1184                         goto unlock;
1185                 }
1186                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1187                                           &_flags);
1188                 if (err)
1189                         goto unlock;
1190
1191                 flags = &_flags;
1192                 change = true;
1193         }
1194
1195         if (change)
1196                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1197         else
1198                 err = 0;
1199
1200         if (!err && params.use_4addr != -1)
1201                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1202
1203  unlock:
1204         dev_put(dev);
1205         cfg80211_unlock_rdev(rdev);
1206  unlock_rtnl:
1207         rtnl_unlock();
1208         return err;
1209 }
1210
1211 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1212 {
1213         struct cfg80211_registered_device *rdev;
1214         struct vif_params params;
1215         int err;
1216         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1217         u32 flags;
1218
1219         memset(&params, 0, sizeof(params));
1220
1221         if (!info->attrs[NL80211_ATTR_IFNAME])
1222                 return -EINVAL;
1223
1224         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1225                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1226                 if (type > NL80211_IFTYPE_MAX)
1227                         return -EINVAL;
1228         }
1229
1230         rtnl_lock();
1231
1232         rdev = cfg80211_get_dev_from_info(info);
1233         if (IS_ERR(rdev)) {
1234                 err = PTR_ERR(rdev);
1235                 goto unlock_rtnl;
1236         }
1237
1238         if (!rdev->ops->add_virtual_intf ||
1239             !(rdev->wiphy.interface_modes & (1 << type))) {
1240                 err = -EOPNOTSUPP;
1241                 goto unlock;
1242         }
1243
1244         if (type == NL80211_IFTYPE_MESH_POINT &&
1245             info->attrs[NL80211_ATTR_MESH_ID]) {
1246                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1247                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1248         }
1249
1250         if (info->attrs[NL80211_ATTR_4ADDR]) {
1251                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1252                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1253                 if (err)
1254                         goto unlock;
1255         }
1256
1257         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1258                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1259                                   &flags);
1260         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1261                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1262                 type, err ? NULL : &flags, &params);
1263
1264  unlock:
1265         cfg80211_unlock_rdev(rdev);
1266  unlock_rtnl:
1267         rtnl_unlock();
1268         return err;
1269 }
1270
1271 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1272 {
1273         struct cfg80211_registered_device *rdev;
1274         int err;
1275         struct net_device *dev;
1276
1277         rtnl_lock();
1278
1279         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1280         if (err)
1281                 goto unlock_rtnl;
1282
1283         if (!rdev->ops->del_virtual_intf) {
1284                 err = -EOPNOTSUPP;
1285                 goto out;
1286         }
1287
1288         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1289
1290  out:
1291         cfg80211_unlock_rdev(rdev);
1292         dev_put(dev);
1293  unlock_rtnl:
1294         rtnl_unlock();
1295         return err;
1296 }
1297
1298 struct get_key_cookie {
1299         struct sk_buff *msg;
1300         int error;
1301         int idx;
1302 };
1303
1304 static void get_key_callback(void *c, struct key_params *params)
1305 {
1306         struct nlattr *key;
1307         struct get_key_cookie *cookie = c;
1308
1309         if (params->key)
1310                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1311                         params->key_len, params->key);
1312
1313         if (params->seq)
1314                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1315                         params->seq_len, params->seq);
1316
1317         if (params->cipher)
1318                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1319                             params->cipher);
1320
1321         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1322         if (!key)
1323                 goto nla_put_failure;
1324
1325         if (params->key)
1326                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1327                         params->key_len, params->key);
1328
1329         if (params->seq)
1330                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1331                         params->seq_len, params->seq);
1332
1333         if (params->cipher)
1334                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1335                             params->cipher);
1336
1337         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1338
1339         nla_nest_end(cookie->msg, key);
1340
1341         return;
1342  nla_put_failure:
1343         cookie->error = 1;
1344 }
1345
1346 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1347 {
1348         struct cfg80211_registered_device *rdev;
1349         int err;
1350         struct net_device *dev;
1351         u8 key_idx = 0;
1352         u8 *mac_addr = NULL;
1353         struct get_key_cookie cookie = {
1354                 .error = 0,
1355         };
1356         void *hdr;
1357         struct sk_buff *msg;
1358
1359         if (info->attrs[NL80211_ATTR_KEY_IDX])
1360                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1361
1362         if (key_idx > 5)
1363                 return -EINVAL;
1364
1365         if (info->attrs[NL80211_ATTR_MAC])
1366                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1367
1368         rtnl_lock();
1369
1370         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1371         if (err)
1372                 goto unlock_rtnl;
1373
1374         if (!rdev->ops->get_key) {
1375                 err = -EOPNOTSUPP;
1376                 goto out;
1377         }
1378
1379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1380         if (!msg) {
1381                 err = -ENOMEM;
1382                 goto out;
1383         }
1384
1385         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1386                              NL80211_CMD_NEW_KEY);
1387
1388         if (IS_ERR(hdr)) {
1389                 err = PTR_ERR(hdr);
1390                 goto free_msg;
1391         }
1392
1393         cookie.msg = msg;
1394         cookie.idx = key_idx;
1395
1396         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1397         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1398         if (mac_addr)
1399                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1400
1401         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1402                                 &cookie, get_key_callback);
1403
1404         if (err)
1405                 goto free_msg;
1406
1407         if (cookie.error)
1408                 goto nla_put_failure;
1409
1410         genlmsg_end(msg, hdr);
1411         err = genlmsg_reply(msg, info);
1412         goto out;
1413
1414  nla_put_failure:
1415         err = -ENOBUFS;
1416  free_msg:
1417         nlmsg_free(msg);
1418  out:
1419         cfg80211_unlock_rdev(rdev);
1420         dev_put(dev);
1421  unlock_rtnl:
1422         rtnl_unlock();
1423
1424         return err;
1425 }
1426
1427 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1428 {
1429         struct cfg80211_registered_device *rdev;
1430         struct key_parse key;
1431         int err;
1432         struct net_device *dev;
1433         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1434                     u8 key_index);
1435
1436         err = nl80211_parse_key(info, &key);
1437         if (err)
1438                 return err;
1439
1440         if (key.idx < 0)
1441                 return -EINVAL;
1442
1443         /* only support setting default key */
1444         if (!key.def && !key.defmgmt)
1445                 return -EINVAL;
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 (key.def)
1454                 func = rdev->ops->set_default_key;
1455         else
1456                 func = rdev->ops->set_default_mgmt_key;
1457
1458         if (!func) {
1459                 err = -EOPNOTSUPP;
1460                 goto out;
1461         }
1462
1463         wdev_lock(dev->ieee80211_ptr);
1464         err = nl80211_key_allowed(dev->ieee80211_ptr);
1465         if (!err)
1466                 err = func(&rdev->wiphy, dev, key.idx);
1467
1468 #ifdef CONFIG_CFG80211_WEXT
1469         if (!err) {
1470                 if (func == rdev->ops->set_default_key)
1471                         dev->ieee80211_ptr->wext.default_key = key.idx;
1472                 else
1473                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1474         }
1475 #endif
1476         wdev_unlock(dev->ieee80211_ptr);
1477
1478  out:
1479         cfg80211_unlock_rdev(rdev);
1480         dev_put(dev);
1481
1482  unlock_rtnl:
1483         rtnl_unlock();
1484
1485         return err;
1486 }
1487
1488 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1489 {
1490         struct cfg80211_registered_device *rdev;
1491         int err;
1492         struct net_device *dev;
1493         struct key_parse key;
1494         u8 *mac_addr = NULL;
1495
1496         err = nl80211_parse_key(info, &key);
1497         if (err)
1498                 return err;
1499
1500         if (!key.p.key)
1501                 return -EINVAL;
1502
1503         if (info->attrs[NL80211_ATTR_MAC])
1504                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1505
1506         rtnl_lock();
1507
1508         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1509         if (err)
1510                 goto unlock_rtnl;
1511
1512         if (!rdev->ops->add_key) {
1513                 err = -EOPNOTSUPP;
1514                 goto out;
1515         }
1516
1517         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1518                 err = -EINVAL;
1519                 goto out;
1520         }
1521
1522         wdev_lock(dev->ieee80211_ptr);
1523         err = nl80211_key_allowed(dev->ieee80211_ptr);
1524         if (!err)
1525                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1526                                          mac_addr, &key.p);
1527         wdev_unlock(dev->ieee80211_ptr);
1528
1529  out:
1530         cfg80211_unlock_rdev(rdev);
1531         dev_put(dev);
1532  unlock_rtnl:
1533         rtnl_unlock();
1534
1535         return err;
1536 }
1537
1538 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1539 {
1540         struct cfg80211_registered_device *rdev;
1541         int err;
1542         struct net_device *dev;
1543         u8 *mac_addr = NULL;
1544         struct key_parse key;
1545
1546         err = nl80211_parse_key(info, &key);
1547         if (err)
1548                 return err;
1549
1550         if (info->attrs[NL80211_ATTR_MAC])
1551                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1552
1553         rtnl_lock();
1554
1555         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1556         if (err)
1557                 goto unlock_rtnl;
1558
1559         if (!rdev->ops->del_key) {
1560                 err = -EOPNOTSUPP;
1561                 goto out;
1562         }
1563
1564         wdev_lock(dev->ieee80211_ptr);
1565         err = nl80211_key_allowed(dev->ieee80211_ptr);
1566         if (!err)
1567                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1568
1569 #ifdef CONFIG_CFG80211_WEXT
1570         if (!err) {
1571                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1572                         dev->ieee80211_ptr->wext.default_key = -1;
1573                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1574                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1575         }
1576 #endif
1577         wdev_unlock(dev->ieee80211_ptr);
1578
1579  out:
1580         cfg80211_unlock_rdev(rdev);
1581         dev_put(dev);
1582
1583  unlock_rtnl:
1584         rtnl_unlock();
1585
1586         return err;
1587 }
1588
1589 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1590 {
1591         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1592                     struct beacon_parameters *info);
1593         struct cfg80211_registered_device *rdev;
1594         int err;
1595         struct net_device *dev;
1596         struct beacon_parameters params;
1597         int haveinfo = 0;
1598
1599         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1600                 return -EINVAL;
1601
1602         rtnl_lock();
1603
1604         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1605         if (err)
1606                 goto unlock_rtnl;
1607
1608         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1609                 err = -EOPNOTSUPP;
1610                 goto out;
1611         }
1612
1613         switch (info->genlhdr->cmd) {
1614         case NL80211_CMD_NEW_BEACON:
1615                 /* these are required for NEW_BEACON */
1616                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1617                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1618                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1619                         err = -EINVAL;
1620                         goto out;
1621                 }
1622
1623                 call = rdev->ops->add_beacon;
1624                 break;
1625         case NL80211_CMD_SET_BEACON:
1626                 call = rdev->ops->set_beacon;
1627                 break;
1628         default:
1629                 WARN_ON(1);
1630                 err = -EOPNOTSUPP;
1631                 goto out;
1632         }
1633
1634         if (!call) {
1635                 err = -EOPNOTSUPP;
1636                 goto out;
1637         }
1638
1639         memset(&params, 0, sizeof(params));
1640
1641         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1642                 params.interval =
1643                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1644                 haveinfo = 1;
1645         }
1646
1647         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1648                 params.dtim_period =
1649                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1650                 haveinfo = 1;
1651         }
1652
1653         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1654                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1655                 params.head_len =
1656                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1657                 haveinfo = 1;
1658         }
1659
1660         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1661                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1662                 params.tail_len =
1663                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1664                 haveinfo = 1;
1665         }
1666
1667         if (!haveinfo) {
1668                 err = -EINVAL;
1669                 goto out;
1670         }
1671
1672         err = call(&rdev->wiphy, dev, &params);
1673
1674  out:
1675         cfg80211_unlock_rdev(rdev);
1676         dev_put(dev);
1677  unlock_rtnl:
1678         rtnl_unlock();
1679
1680         return err;
1681 }
1682
1683 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1684 {
1685         struct cfg80211_registered_device *rdev;
1686         int err;
1687         struct net_device *dev;
1688
1689         rtnl_lock();
1690
1691         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1692         if (err)
1693                 goto unlock_rtnl;
1694
1695         if (!rdev->ops->del_beacon) {
1696                 err = -EOPNOTSUPP;
1697                 goto out;
1698         }
1699
1700         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1701                 err = -EOPNOTSUPP;
1702                 goto out;
1703         }
1704         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1705
1706  out:
1707         cfg80211_unlock_rdev(rdev);
1708         dev_put(dev);
1709  unlock_rtnl:
1710         rtnl_unlock();
1711
1712         return err;
1713 }
1714
1715 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1716         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1717         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1718         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1719         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1720 };
1721
1722 static int parse_station_flags(struct genl_info *info,
1723                                struct station_parameters *params)
1724 {
1725         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1726         struct nlattr *nla;
1727         int flag;
1728
1729         /*
1730          * Try parsing the new attribute first so userspace
1731          * can specify both for older kernels.
1732          */
1733         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1734         if (nla) {
1735                 struct nl80211_sta_flag_update *sta_flags;
1736
1737                 sta_flags = nla_data(nla);
1738                 params->sta_flags_mask = sta_flags->mask;
1739                 params->sta_flags_set = sta_flags->set;
1740                 if ((params->sta_flags_mask |
1741                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1742                         return -EINVAL;
1743                 return 0;
1744         }
1745
1746         /* if present, parse the old attribute */
1747
1748         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1749         if (!nla)
1750                 return 0;
1751
1752         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1753                              nla, sta_flags_policy))
1754                 return -EINVAL;
1755
1756         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1757         params->sta_flags_mask &= ~1;
1758
1759         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1760                 if (flags[flag])
1761                         params->sta_flags_set |= (1<<flag);
1762
1763         return 0;
1764 }
1765
1766 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1767                                 int flags, struct net_device *dev,
1768                                 const u8 *mac_addr, struct station_info *sinfo)
1769 {
1770         void *hdr;
1771         struct nlattr *sinfoattr, *txrate;
1772         u16 bitrate;
1773
1774         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1775         if (!hdr)
1776                 return -1;
1777
1778         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1779         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1780
1781         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1782
1783         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1784         if (!sinfoattr)
1785                 goto nla_put_failure;
1786         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1787                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1788                             sinfo->inactive_time);
1789         if (sinfo->filled & STATION_INFO_RX_BYTES)
1790                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1791                             sinfo->rx_bytes);
1792         if (sinfo->filled & STATION_INFO_TX_BYTES)
1793                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1794                             sinfo->tx_bytes);
1795         if (sinfo->filled & STATION_INFO_LLID)
1796                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1797                             sinfo->llid);
1798         if (sinfo->filled & STATION_INFO_PLID)
1799                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1800                             sinfo->plid);
1801         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1802                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1803                             sinfo->plink_state);
1804         if (sinfo->filled & STATION_INFO_SIGNAL)
1805                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1806                            sinfo->signal);
1807         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1808                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1809                 if (!txrate)
1810                         goto nla_put_failure;
1811
1812                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1813                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1814                 if (bitrate > 0)
1815                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1816
1817                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1818                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1819                                     sinfo->txrate.mcs);
1820                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1821                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1822                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1823                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1824
1825                 nla_nest_end(msg, txrate);
1826         }
1827         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1828                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1829                             sinfo->rx_packets);
1830         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1831                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1832                             sinfo->tx_packets);
1833         nla_nest_end(msg, sinfoattr);
1834
1835         return genlmsg_end(msg, hdr);
1836
1837  nla_put_failure:
1838         genlmsg_cancel(msg, hdr);
1839         return -EMSGSIZE;
1840 }
1841
1842 static int nl80211_dump_station(struct sk_buff *skb,
1843                                 struct netlink_callback *cb)
1844 {
1845         struct station_info sinfo;
1846         struct cfg80211_registered_device *dev;
1847         struct net_device *netdev;
1848         u8 mac_addr[ETH_ALEN];
1849         int ifidx = cb->args[0];
1850         int sta_idx = cb->args[1];
1851         int err;
1852
1853         if (!ifidx)
1854                 ifidx = nl80211_get_ifidx(cb);
1855         if (ifidx < 0)
1856                 return ifidx;
1857
1858         rtnl_lock();
1859
1860         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1861         if (!netdev) {
1862                 err = -ENODEV;
1863                 goto out_rtnl;
1864         }
1865
1866         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1867         if (IS_ERR(dev)) {
1868                 err = PTR_ERR(dev);
1869                 goto out_rtnl;
1870         }
1871
1872         if (!dev->ops->dump_station) {
1873                 err = -EOPNOTSUPP;
1874                 goto out_err;
1875         }
1876
1877         while (1) {
1878                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1879                                              mac_addr, &sinfo);
1880                 if (err == -ENOENT)
1881                         break;
1882                 if (err)
1883                         goto out_err;
1884
1885                 if (nl80211_send_station(skb,
1886                                 NETLINK_CB(cb->skb).pid,
1887                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1888                                 netdev, mac_addr,
1889                                 &sinfo) < 0)
1890                         goto out;
1891
1892                 sta_idx++;
1893         }
1894
1895
1896  out:
1897         cb->args[1] = sta_idx;
1898         err = skb->len;
1899  out_err:
1900         cfg80211_unlock_rdev(dev);
1901  out_rtnl:
1902         rtnl_unlock();
1903
1904         return err;
1905 }
1906
1907 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1908 {
1909         struct cfg80211_registered_device *rdev;
1910         int err;
1911         struct net_device *dev;
1912         struct station_info sinfo;
1913         struct sk_buff *msg;
1914         u8 *mac_addr = NULL;
1915
1916         memset(&sinfo, 0, sizeof(sinfo));
1917
1918         if (!info->attrs[NL80211_ATTR_MAC])
1919                 return -EINVAL;
1920
1921         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1922
1923         rtnl_lock();
1924
1925         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1926         if (err)
1927                 goto out_rtnl;
1928
1929         if (!rdev->ops->get_station) {
1930                 err = -EOPNOTSUPP;
1931                 goto out;
1932         }
1933
1934         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1935         if (err)
1936                 goto out;
1937
1938         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1939         if (!msg)
1940                 goto out;
1941
1942         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1943                                  dev, mac_addr, &sinfo) < 0)
1944                 goto out_free;
1945
1946         err = genlmsg_reply(msg, info);
1947         goto out;
1948
1949  out_free:
1950         nlmsg_free(msg);
1951  out:
1952         cfg80211_unlock_rdev(rdev);
1953         dev_put(dev);
1954  out_rtnl:
1955         rtnl_unlock();
1956
1957         return err;
1958 }
1959
1960 /*
1961  * Get vlan interface making sure it is running and on the right wiphy.
1962  */
1963 static int get_vlan(struct genl_info *info,
1964                     struct cfg80211_registered_device *rdev,
1965                     struct net_device **vlan)
1966 {
1967         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
1968         *vlan = NULL;
1969
1970         if (vlanattr) {
1971                 *vlan = dev_get_by_index(genl_info_net(info),
1972                                          nla_get_u32(vlanattr));
1973                 if (!*vlan)
1974                         return -ENODEV;
1975                 if (!(*vlan)->ieee80211_ptr)
1976                         return -EINVAL;
1977                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1978                         return -EINVAL;
1979                 if (!netif_running(*vlan))
1980                         return -ENETDOWN;
1981         }
1982         return 0;
1983 }
1984
1985 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1986 {
1987         struct cfg80211_registered_device *rdev;
1988         int err;
1989         struct net_device *dev;
1990         struct station_parameters params;
1991         u8 *mac_addr = NULL;
1992
1993         memset(&params, 0, sizeof(params));
1994
1995         params.listen_interval = -1;
1996
1997         if (info->attrs[NL80211_ATTR_STA_AID])
1998                 return -EINVAL;
1999
2000         if (!info->attrs[NL80211_ATTR_MAC])
2001                 return -EINVAL;
2002
2003         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2004
2005         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2006                 params.supported_rates =
2007                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2008                 params.supported_rates_len =
2009                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2010         }
2011
2012         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2013                 params.listen_interval =
2014                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2015
2016         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2017                 params.ht_capa =
2018                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2019
2020         if (parse_station_flags(info, &params))
2021                 return -EINVAL;
2022
2023         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2024                 params.plink_action =
2025                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2026
2027         rtnl_lock();
2028
2029         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2030         if (err)
2031                 goto out_rtnl;
2032
2033         err = get_vlan(info, rdev, &params.vlan);
2034         if (err)
2035                 goto out;
2036
2037         /* validate settings */
2038         err = 0;
2039
2040         switch (dev->ieee80211_ptr->iftype) {
2041         case NL80211_IFTYPE_AP:
2042         case NL80211_IFTYPE_AP_VLAN:
2043                 /* disallow mesh-specific things */
2044                 if (params.plink_action)
2045                         err = -EINVAL;
2046                 break;
2047         case NL80211_IFTYPE_STATION:
2048                 /* disallow everything but AUTHORIZED flag */
2049                 if (params.plink_action)
2050                         err = -EINVAL;
2051                 if (params.vlan)
2052                         err = -EINVAL;
2053                 if (params.supported_rates)
2054                         err = -EINVAL;
2055                 if (params.ht_capa)
2056                         err = -EINVAL;
2057                 if (params.listen_interval >= 0)
2058                         err = -EINVAL;
2059                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2060                         err = -EINVAL;
2061                 break;
2062         case NL80211_IFTYPE_MESH_POINT:
2063                 /* disallow things mesh doesn't support */
2064                 if (params.vlan)
2065                         err = -EINVAL;
2066                 if (params.ht_capa)
2067                         err = -EINVAL;
2068                 if (params.listen_interval >= 0)
2069                         err = -EINVAL;
2070                 if (params.supported_rates)
2071                         err = -EINVAL;
2072                 if (params.sta_flags_mask)
2073                         err = -EINVAL;
2074                 break;
2075         default:
2076                 err = -EINVAL;
2077         }
2078
2079         if (err)
2080                 goto out;
2081
2082         if (!rdev->ops->change_station) {
2083                 err = -EOPNOTSUPP;
2084                 goto out;
2085         }
2086
2087         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2088
2089  out:
2090         if (params.vlan)
2091                 dev_put(params.vlan);
2092         cfg80211_unlock_rdev(rdev);
2093         dev_put(dev);
2094  out_rtnl:
2095         rtnl_unlock();
2096
2097         return err;
2098 }
2099
2100 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2101 {
2102         struct cfg80211_registered_device *rdev;
2103         int err;
2104         struct net_device *dev;
2105         struct station_parameters params;
2106         u8 *mac_addr = NULL;
2107
2108         memset(&params, 0, sizeof(params));
2109
2110         if (!info->attrs[NL80211_ATTR_MAC])
2111                 return -EINVAL;
2112
2113         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2114                 return -EINVAL;
2115
2116         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2117                 return -EINVAL;
2118
2119         if (!info->attrs[NL80211_ATTR_STA_AID])
2120                 return -EINVAL;
2121
2122         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2123         params.supported_rates =
2124                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2125         params.supported_rates_len =
2126                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2127         params.listen_interval =
2128                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2129
2130         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2131         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2132                 return -EINVAL;
2133
2134         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2135                 params.ht_capa =
2136                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2137
2138         if (parse_station_flags(info, &params))
2139                 return -EINVAL;
2140
2141         rtnl_lock();
2142
2143         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2144         if (err)
2145                 goto out_rtnl;
2146
2147         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2148             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) {
2149                 err = -EINVAL;
2150                 goto out;
2151         }
2152
2153         err = get_vlan(info, rdev, &params.vlan);
2154         if (err)
2155                 goto out;
2156
2157         /* validate settings */
2158         err = 0;
2159
2160         if (!rdev->ops->add_station) {
2161                 err = -EOPNOTSUPP;
2162                 goto out;
2163         }
2164
2165         if (!netif_running(dev)) {
2166                 err = -ENETDOWN;
2167                 goto out;
2168         }
2169
2170         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2171
2172  out:
2173         if (params.vlan)
2174                 dev_put(params.vlan);
2175         cfg80211_unlock_rdev(rdev);
2176         dev_put(dev);
2177  out_rtnl:
2178         rtnl_unlock();
2179
2180         return err;
2181 }
2182
2183 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2184 {
2185         struct cfg80211_registered_device *rdev;
2186         int err;
2187         struct net_device *dev;
2188         u8 *mac_addr = NULL;
2189
2190         if (info->attrs[NL80211_ATTR_MAC])
2191                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2192
2193         rtnl_lock();
2194
2195         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2196         if (err)
2197                 goto out_rtnl;
2198
2199         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2200             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2201             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2202                 err = -EINVAL;
2203                 goto out;
2204         }
2205
2206         if (!rdev->ops->del_station) {
2207                 err = -EOPNOTSUPP;
2208                 goto out;
2209         }
2210
2211         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2212
2213  out:
2214         cfg80211_unlock_rdev(rdev);
2215         dev_put(dev);
2216  out_rtnl:
2217         rtnl_unlock();
2218
2219         return err;
2220 }
2221
2222 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2223                                 int flags, struct net_device *dev,
2224                                 u8 *dst, u8 *next_hop,
2225                                 struct mpath_info *pinfo)
2226 {
2227         void *hdr;
2228         struct nlattr *pinfoattr;
2229
2230         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2231         if (!hdr)
2232                 return -1;
2233
2234         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2235         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2236         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2237
2238         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2239
2240         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2241         if (!pinfoattr)
2242                 goto nla_put_failure;
2243         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2244                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2245                             pinfo->frame_qlen);
2246         if (pinfo->filled & MPATH_INFO_SN)
2247                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2248                             pinfo->sn);
2249         if (pinfo->filled & MPATH_INFO_METRIC)
2250                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2251                             pinfo->metric);
2252         if (pinfo->filled & MPATH_INFO_EXPTIME)
2253                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2254                             pinfo->exptime);
2255         if (pinfo->filled & MPATH_INFO_FLAGS)
2256                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2257                             pinfo->flags);
2258         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2259                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2260                             pinfo->discovery_timeout);
2261         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2262                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2263                             pinfo->discovery_retries);
2264
2265         nla_nest_end(msg, pinfoattr);
2266
2267         return genlmsg_end(msg, hdr);
2268
2269  nla_put_failure:
2270         genlmsg_cancel(msg, hdr);
2271         return -EMSGSIZE;
2272 }
2273
2274 static int nl80211_dump_mpath(struct sk_buff *skb,
2275                               struct netlink_callback *cb)
2276 {
2277         struct mpath_info pinfo;
2278         struct cfg80211_registered_device *dev;
2279         struct net_device *netdev;
2280         u8 dst[ETH_ALEN];
2281         u8 next_hop[ETH_ALEN];
2282         int ifidx = cb->args[0];
2283         int path_idx = cb->args[1];
2284         int err;
2285
2286         if (!ifidx)
2287                 ifidx = nl80211_get_ifidx(cb);
2288         if (ifidx < 0)
2289                 return ifidx;
2290
2291         rtnl_lock();
2292
2293         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2294         if (!netdev) {
2295                 err = -ENODEV;
2296                 goto out_rtnl;
2297         }
2298
2299         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2300         if (IS_ERR(dev)) {
2301                 err = PTR_ERR(dev);
2302                 goto out_rtnl;
2303         }
2304
2305         if (!dev->ops->dump_mpath) {
2306                 err = -EOPNOTSUPP;
2307                 goto out_err;
2308         }
2309
2310         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2311                 err = -EOPNOTSUPP;
2312                 goto out_err;
2313         }
2314
2315         while (1) {
2316                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2317                                            dst, next_hop, &pinfo);
2318                 if (err == -ENOENT)
2319                         break;
2320                 if (err)
2321                         goto out_err;
2322
2323                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2324                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2325                                        netdev, dst, next_hop,
2326                                        &pinfo) < 0)
2327                         goto out;
2328
2329                 path_idx++;
2330         }
2331
2332
2333  out:
2334         cb->args[1] = path_idx;
2335         err = skb->len;
2336  out_err:
2337         cfg80211_unlock_rdev(dev);
2338  out_rtnl:
2339         rtnl_unlock();
2340
2341         return err;
2342 }
2343
2344 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2345 {
2346         struct cfg80211_registered_device *rdev;
2347         int err;
2348         struct net_device *dev;
2349         struct mpath_info pinfo;
2350         struct sk_buff *msg;
2351         u8 *dst = NULL;
2352         u8 next_hop[ETH_ALEN];
2353
2354         memset(&pinfo, 0, sizeof(pinfo));
2355
2356         if (!info->attrs[NL80211_ATTR_MAC])
2357                 return -EINVAL;
2358
2359         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2360
2361         rtnl_lock();
2362
2363         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2364         if (err)
2365                 goto out_rtnl;
2366
2367         if (!rdev->ops->get_mpath) {
2368                 err = -EOPNOTSUPP;
2369                 goto out;
2370         }
2371
2372         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2373                 err = -EOPNOTSUPP;
2374                 goto out;
2375         }
2376
2377         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2378         if (err)
2379                 goto out;
2380
2381         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2382         if (!msg)
2383                 goto out;
2384
2385         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2386                                  dev, dst, next_hop, &pinfo) < 0)
2387                 goto out_free;
2388
2389         err = genlmsg_reply(msg, info);
2390         goto out;
2391
2392  out_free:
2393         nlmsg_free(msg);
2394  out:
2395         cfg80211_unlock_rdev(rdev);
2396         dev_put(dev);
2397  out_rtnl:
2398         rtnl_unlock();
2399
2400         return err;
2401 }
2402
2403 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2404 {
2405         struct cfg80211_registered_device *rdev;
2406         int err;
2407         struct net_device *dev;
2408         u8 *dst = NULL;
2409         u8 *next_hop = NULL;
2410
2411         if (!info->attrs[NL80211_ATTR_MAC])
2412                 return -EINVAL;
2413
2414         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2415                 return -EINVAL;
2416
2417         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2418         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2419
2420         rtnl_lock();
2421
2422         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2423         if (err)
2424                 goto out_rtnl;
2425
2426         if (!rdev->ops->change_mpath) {
2427                 err = -EOPNOTSUPP;
2428                 goto out;
2429         }
2430
2431         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2432                 err = -EOPNOTSUPP;
2433                 goto out;
2434         }
2435
2436         if (!netif_running(dev)) {
2437                 err = -ENETDOWN;
2438                 goto out;
2439         }
2440
2441         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2442
2443  out:
2444         cfg80211_unlock_rdev(rdev);
2445         dev_put(dev);
2446  out_rtnl:
2447         rtnl_unlock();
2448
2449         return err;
2450 }
2451 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2452 {
2453         struct cfg80211_registered_device *rdev;
2454         int err;
2455         struct net_device *dev;
2456         u8 *dst = NULL;
2457         u8 *next_hop = NULL;
2458
2459         if (!info->attrs[NL80211_ATTR_MAC])
2460                 return -EINVAL;
2461
2462         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2463                 return -EINVAL;
2464
2465         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2466         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2467
2468         rtnl_lock();
2469
2470         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2471         if (err)
2472                 goto out_rtnl;
2473
2474         if (!rdev->ops->add_mpath) {
2475                 err = -EOPNOTSUPP;
2476                 goto out;
2477         }
2478
2479         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2480                 err = -EOPNOTSUPP;
2481                 goto out;
2482         }
2483
2484         if (!netif_running(dev)) {
2485                 err = -ENETDOWN;
2486                 goto out;
2487         }
2488
2489         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2490
2491  out:
2492         cfg80211_unlock_rdev(rdev);
2493         dev_put(dev);
2494  out_rtnl:
2495         rtnl_unlock();
2496
2497         return err;
2498 }
2499
2500 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2501 {
2502         struct cfg80211_registered_device *rdev;
2503         int err;
2504         struct net_device *dev;
2505         u8 *dst = NULL;
2506
2507         if (info->attrs[NL80211_ATTR_MAC])
2508                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2509
2510         rtnl_lock();
2511
2512         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2513         if (err)
2514                 goto out_rtnl;
2515
2516         if (!rdev->ops->del_mpath) {
2517                 err = -EOPNOTSUPP;
2518                 goto out;
2519         }
2520
2521         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2522
2523  out:
2524         cfg80211_unlock_rdev(rdev);
2525         dev_put(dev);
2526  out_rtnl:
2527         rtnl_unlock();
2528
2529         return err;
2530 }
2531
2532 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2533 {
2534         struct cfg80211_registered_device *rdev;
2535         int err;
2536         struct net_device *dev;
2537         struct bss_parameters params;
2538
2539         memset(&params, 0, sizeof(params));
2540         /* default to not changing parameters */
2541         params.use_cts_prot = -1;
2542         params.use_short_preamble = -1;
2543         params.use_short_slot_time = -1;
2544         params.ap_isolate = -1;
2545
2546         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2547                 params.use_cts_prot =
2548                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2549         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2550                 params.use_short_preamble =
2551                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2552         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2553                 params.use_short_slot_time =
2554                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2555         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2556                 params.basic_rates =
2557                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2558                 params.basic_rates_len =
2559                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2560         }
2561         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2562                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2563
2564         rtnl_lock();
2565
2566         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2567         if (err)
2568                 goto out_rtnl;
2569
2570         if (!rdev->ops->change_bss) {
2571                 err = -EOPNOTSUPP;
2572                 goto out;
2573         }
2574
2575         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2576                 err = -EOPNOTSUPP;
2577                 goto out;
2578         }
2579
2580         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2581
2582  out:
2583         cfg80211_unlock_rdev(rdev);
2584         dev_put(dev);
2585  out_rtnl:
2586         rtnl_unlock();
2587
2588         return err;
2589 }
2590
2591 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2592         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2593         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2594         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2595         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2596         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2597         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2598 };
2599
2600 static int parse_reg_rule(struct nlattr *tb[],
2601         struct ieee80211_reg_rule *reg_rule)
2602 {
2603         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2604         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2605
2606         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2607                 return -EINVAL;
2608         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2609                 return -EINVAL;
2610         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2611                 return -EINVAL;
2612         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2613                 return -EINVAL;
2614         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2615                 return -EINVAL;
2616
2617         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2618
2619         freq_range->start_freq_khz =
2620                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2621         freq_range->end_freq_khz =
2622                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2623         freq_range->max_bandwidth_khz =
2624                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2625
2626         power_rule->max_eirp =
2627                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2628
2629         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2630                 power_rule->max_antenna_gain =
2631                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2632
2633         return 0;
2634 }
2635
2636 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2637 {
2638         int r;
2639         char *data = NULL;
2640
2641         /*
2642          * You should only get this when cfg80211 hasn't yet initialized
2643          * completely when built-in to the kernel right between the time
2644          * window between nl80211_init() and regulatory_init(), if that is
2645          * even possible.
2646          */
2647         mutex_lock(&cfg80211_mutex);
2648         if (unlikely(!cfg80211_regdomain)) {
2649                 mutex_unlock(&cfg80211_mutex);
2650                 return -EINPROGRESS;
2651         }
2652         mutex_unlock(&cfg80211_mutex);
2653
2654         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2655                 return -EINVAL;
2656
2657         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2658
2659         r = regulatory_hint_user(data);
2660
2661         return r;
2662 }
2663
2664 static int nl80211_get_mesh_params(struct sk_buff *skb,
2665         struct genl_info *info)
2666 {
2667         struct cfg80211_registered_device *rdev;
2668         struct mesh_config cur_params;
2669         int err;
2670         struct net_device *dev;
2671         void *hdr;
2672         struct nlattr *pinfoattr;
2673         struct sk_buff *msg;
2674
2675         rtnl_lock();
2676
2677         /* Look up our device */
2678         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2679         if (err)
2680                 goto out_rtnl;
2681
2682         if (!rdev->ops->get_mesh_params) {
2683                 err = -EOPNOTSUPP;
2684                 goto out;
2685         }
2686
2687         /* Get the mesh params */
2688         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2689         if (err)
2690                 goto out;
2691
2692         /* Draw up a netlink message to send back */
2693         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2694         if (!msg) {
2695                 err = -ENOBUFS;
2696                 goto out;
2697         }
2698         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2699                              NL80211_CMD_GET_MESH_PARAMS);
2700         if (!hdr)
2701                 goto nla_put_failure;
2702         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2703         if (!pinfoattr)
2704                 goto nla_put_failure;
2705         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2706         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2707                         cur_params.dot11MeshRetryTimeout);
2708         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2709                         cur_params.dot11MeshConfirmTimeout);
2710         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2711                         cur_params.dot11MeshHoldingTimeout);
2712         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2713                         cur_params.dot11MeshMaxPeerLinks);
2714         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2715                         cur_params.dot11MeshMaxRetries);
2716         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2717                         cur_params.dot11MeshTTL);
2718         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2719                         cur_params.auto_open_plinks);
2720         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2721                         cur_params.dot11MeshHWMPmaxPREQretries);
2722         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2723                         cur_params.path_refresh_time);
2724         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2725                         cur_params.min_discovery_timeout);
2726         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2727                         cur_params.dot11MeshHWMPactivePathTimeout);
2728         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2729                         cur_params.dot11MeshHWMPpreqMinInterval);
2730         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2731                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2732         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2733                         cur_params.dot11MeshHWMPRootMode);
2734         nla_nest_end(msg, pinfoattr);
2735         genlmsg_end(msg, hdr);
2736         err = genlmsg_reply(msg, info);
2737         goto out;
2738
2739  nla_put_failure:
2740         genlmsg_cancel(msg, hdr);
2741         err = -EMSGSIZE;
2742  out:
2743         /* Cleanup */
2744         cfg80211_unlock_rdev(rdev);
2745         dev_put(dev);
2746  out_rtnl:
2747         rtnl_unlock();
2748
2749         return err;
2750 }
2751
2752 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2753 do {\
2754         if (table[attr_num]) {\
2755                 cfg.param = nla_fn(table[attr_num]); \
2756                 mask |= (1 << (attr_num - 1)); \
2757         } \
2758 } while (0);\
2759
2760 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2761         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2762         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2763         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2764         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2765         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2766         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2767         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2768
2769         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2770         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2771         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2772         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2773         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2774         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2775 };
2776
2777 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2778 {
2779         int err;
2780         u32 mask;
2781         struct cfg80211_registered_device *rdev;
2782         struct net_device *dev;
2783         struct mesh_config cfg;
2784         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2785         struct nlattr *parent_attr;
2786
2787         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2788         if (!parent_attr)
2789                 return -EINVAL;
2790         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2791                         parent_attr, nl80211_meshconf_params_policy))
2792                 return -EINVAL;
2793
2794         rtnl_lock();
2795
2796         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2797         if (err)
2798                 goto out_rtnl;
2799
2800         if (!rdev->ops->set_mesh_params) {
2801                 err = -EOPNOTSUPP;
2802                 goto out;
2803         }
2804
2805         /* This makes sure that there aren't more than 32 mesh config
2806          * parameters (otherwise our bitfield scheme would not work.) */
2807         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2808
2809         /* Fill in the params struct */
2810         mask = 0;
2811         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2812                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2813         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2814                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2815         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2816                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2817         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2818                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2819         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2820                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2821         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2822                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2823         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2824                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2825         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2826                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2827                         nla_get_u8);
2828         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2829                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2830         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2831                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2832                         nla_get_u16);
2833         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2834                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2835                         nla_get_u32);
2836         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2837                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2838                         nla_get_u16);
2839         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2840                         dot11MeshHWMPnetDiameterTraversalTime,
2841                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2842                         nla_get_u16);
2843         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2844                         dot11MeshHWMPRootMode, mask,
2845                         NL80211_MESHCONF_HWMP_ROOTMODE,
2846                         nla_get_u8);
2847
2848         /* Apply changes */
2849         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2850
2851  out:
2852         /* cleanup */
2853         cfg80211_unlock_rdev(rdev);
2854         dev_put(dev);
2855  out_rtnl:
2856         rtnl_unlock();
2857
2858         return err;
2859 }
2860
2861 #undef FILL_IN_MESH_PARAM_IF_SET
2862
2863 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2864 {
2865         struct sk_buff *msg;
2866         void *hdr = NULL;
2867         struct nlattr *nl_reg_rules;
2868         unsigned int i;
2869         int err = -EINVAL;
2870
2871         mutex_lock(&cfg80211_mutex);
2872
2873         if (!cfg80211_regdomain)
2874                 goto out;
2875
2876         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2877         if (!msg) {
2878                 err = -ENOBUFS;
2879                 goto out;
2880         }
2881
2882         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2883                              NL80211_CMD_GET_REG);
2884         if (!hdr)
2885                 goto nla_put_failure;
2886
2887         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2888                 cfg80211_regdomain->alpha2);
2889
2890         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2891         if (!nl_reg_rules)
2892                 goto nla_put_failure;
2893
2894         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2895                 struct nlattr *nl_reg_rule;
2896                 const struct ieee80211_reg_rule *reg_rule;
2897                 const struct ieee80211_freq_range *freq_range;
2898                 const struct ieee80211_power_rule *power_rule;
2899
2900                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2901                 freq_range = &reg_rule->freq_range;
2902                 power_rule = &reg_rule->power_rule;
2903
2904                 nl_reg_rule = nla_nest_start(msg, i);
2905                 if (!nl_reg_rule)
2906                         goto nla_put_failure;
2907
2908                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2909                         reg_rule->flags);
2910                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2911                         freq_range->start_freq_khz);
2912                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2913                         freq_range->end_freq_khz);
2914                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2915                         freq_range->max_bandwidth_khz);
2916                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2917                         power_rule->max_antenna_gain);
2918                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2919                         power_rule->max_eirp);
2920
2921                 nla_nest_end(msg, nl_reg_rule);
2922         }
2923
2924         nla_nest_end(msg, nl_reg_rules);
2925
2926         genlmsg_end(msg, hdr);
2927         err = genlmsg_reply(msg, info);
2928         goto out;
2929
2930 nla_put_failure:
2931         genlmsg_cancel(msg, hdr);
2932         err = -EMSGSIZE;
2933 out:
2934         mutex_unlock(&cfg80211_mutex);
2935         return err;
2936 }
2937
2938 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2939 {
2940         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2941         struct nlattr *nl_reg_rule;
2942         char *alpha2 = NULL;
2943         int rem_reg_rules = 0, r = 0;
2944         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2945         struct ieee80211_regdomain *rd = NULL;
2946
2947         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2948                 return -EINVAL;
2949
2950         if (!info->attrs[NL80211_ATTR_REG_RULES])
2951                 return -EINVAL;
2952
2953         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2954
2955         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2956                         rem_reg_rules) {
2957                 num_rules++;
2958                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2959                         return -EINVAL;
2960         }
2961
2962         mutex_lock(&cfg80211_mutex);
2963
2964         if (!reg_is_valid_request(alpha2)) {
2965                 r = -EINVAL;
2966                 goto bad_reg;
2967         }
2968
2969         size_of_regd = sizeof(struct ieee80211_regdomain) +
2970                 (num_rules * sizeof(struct ieee80211_reg_rule));
2971
2972         rd = kzalloc(size_of_regd, GFP_KERNEL);
2973         if (!rd) {
2974                 r = -ENOMEM;
2975                 goto bad_reg;
2976         }
2977
2978         rd->n_reg_rules = num_rules;
2979         rd->alpha2[0] = alpha2[0];
2980         rd->alpha2[1] = alpha2[1];
2981
2982         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2983                         rem_reg_rules) {
2984                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2985                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2986                         reg_rule_policy);
2987                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2988                 if (r)
2989                         goto bad_reg;
2990
2991                 rule_idx++;
2992
2993                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2994                         r = -EINVAL;
2995                         goto bad_reg;
2996                 }
2997         }
2998
2999         BUG_ON(rule_idx != num_rules);
3000
3001         r = set_regdom(rd);
3002
3003         mutex_unlock(&cfg80211_mutex);
3004
3005         return r;
3006
3007  bad_reg:
3008         mutex_unlock(&cfg80211_mutex);
3009         kfree(rd);
3010         return r;
3011 }
3012
3013 static int validate_scan_freqs(struct nlattr *freqs)
3014 {
3015         struct nlattr *attr1, *attr2;
3016         int n_channels = 0, tmp1, tmp2;
3017
3018         nla_for_each_nested(attr1, freqs, tmp1) {
3019                 n_channels++;
3020                 /*
3021                  * Some hardware has a limited channel list for
3022                  * scanning, and it is pretty much nonsensical
3023                  * to scan for a channel twice, so disallow that
3024                  * and don't require drivers to check that the
3025                  * channel list they get isn't longer than what
3026                  * they can scan, as long as they can scan all
3027                  * the channels they registered at once.
3028                  */
3029                 nla_for_each_nested(attr2, freqs, tmp2)
3030                         if (attr1 != attr2 &&
3031                             nla_get_u32(attr1) == nla_get_u32(attr2))
3032                                 return 0;
3033         }
3034
3035         return n_channels;
3036 }
3037
3038 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3039 {
3040         struct cfg80211_registered_device *rdev;
3041         struct net_device *dev;
3042         struct cfg80211_scan_request *request;
3043         struct cfg80211_ssid *ssid;
3044         struct ieee80211_channel *channel;
3045         struct nlattr *attr;
3046         struct wiphy *wiphy;
3047         int err, tmp, n_ssids = 0, n_channels, i;
3048         enum ieee80211_band band;
3049         size_t ie_len;
3050
3051         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3052                 return -EINVAL;
3053
3054         rtnl_lock();
3055
3056         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3057         if (err)
3058                 goto out_rtnl;
3059
3060         wiphy = &rdev->wiphy;
3061
3062         if (!rdev->ops->scan) {
3063                 err = -EOPNOTSUPP;
3064                 goto out;
3065         }
3066
3067         if (!netif_running(dev)) {
3068                 err = -ENETDOWN;
3069                 goto out;
3070         }
3071
3072         if (rdev->scan_req) {
3073                 err = -EBUSY;
3074                 goto out;
3075         }
3076
3077         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3078                 n_channels = validate_scan_freqs(
3079                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3080                 if (!n_channels) {
3081                         err = -EINVAL;
3082                         goto out;
3083                 }
3084         } else {
3085                 n_channels = 0;
3086
3087                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3088                         if (wiphy->bands[band])
3089                                 n_channels += wiphy->bands[band]->n_channels;
3090         }
3091
3092         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3093                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3094                         n_ssids++;
3095
3096         if (n_ssids > wiphy->max_scan_ssids) {
3097                 err = -EINVAL;
3098                 goto out;
3099         }
3100
3101         if (info->attrs[NL80211_ATTR_IE])
3102                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3103         else
3104                 ie_len = 0;
3105
3106         if (ie_len > wiphy->max_scan_ie_len) {
3107                 err = -EINVAL;
3108                 goto out;
3109         }
3110
3111         request = kzalloc(sizeof(*request)
3112                         + sizeof(*ssid) * n_ssids
3113                         + sizeof(channel) * n_channels
3114                         + ie_len, GFP_KERNEL);
3115         if (!request) {
3116                 err = -ENOMEM;
3117                 goto out;
3118         }
3119
3120         if (n_ssids)
3121                 request->ssids = (void *)&request->channels[n_channels];
3122         request->n_ssids = n_ssids;
3123         if (ie_len) {
3124                 if (request->ssids)
3125                         request->ie = (void *)(request->ssids + n_ssids);
3126                 else
3127                         request->ie = (void *)(request->channels + n_channels);
3128         }
3129
3130         i = 0;
3131         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3132                 /* user specified, bail out if channel not found */
3133                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3134                         struct ieee80211_channel *chan;
3135
3136                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3137
3138                         if (!chan) {
3139                                 err = -EINVAL;
3140                                 goto out_free;
3141                         }
3142
3143                         /* ignore disabled channels */
3144                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3145                                 continue;
3146
3147                         request->channels[i] = chan;
3148                         i++;
3149                 }
3150         } else {
3151                 /* all channels */
3152                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3153                         int j;
3154                         if (!wiphy->bands[band])
3155                                 continue;
3156                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3157                                 struct ieee80211_channel *chan;
3158
3159                                 chan = &wiphy->bands[band]->channels[j];
3160
3161                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3162                                         continue;
3163
3164                                 request->channels[i] = chan;
3165                                 i++;
3166                         }
3167                 }
3168         }
3169
3170         if (!i) {
3171                 err = -EINVAL;
3172                 goto out_free;
3173         }
3174
3175         request->n_channels = i;
3176
3177         i = 0;
3178         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3179                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3180                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3181                                 err = -EINVAL;
3182                                 goto out_free;
3183                         }
3184                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3185                         request->ssids[i].ssid_len = nla_len(attr);
3186                         i++;
3187                 }
3188         }
3189
3190         if (info->attrs[NL80211_ATTR_IE]) {
3191                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3192                 memcpy((void *)request->ie,
3193                        nla_data(info->attrs[NL80211_ATTR_IE]),
3194                        request->ie_len);
3195         }
3196
3197         request->dev = dev;
3198         request->wiphy = &rdev->wiphy;
3199
3200         rdev->scan_req = request;
3201         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3202
3203         if (!err) {
3204                 nl80211_send_scan_start(rdev, dev);
3205                 dev_hold(dev);
3206         }
3207
3208  out_free:
3209         if (err) {
3210                 rdev->scan_req = NULL;
3211                 kfree(request);
3212         }
3213  out:
3214         cfg80211_unlock_rdev(rdev);
3215         dev_put(dev);
3216  out_rtnl:
3217         rtnl_unlock();
3218
3219         return err;
3220 }
3221
3222 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3223                             struct cfg80211_registered_device *rdev,
3224                             struct wireless_dev *wdev,
3225                             struct cfg80211_internal_bss *intbss)
3226 {
3227         struct cfg80211_bss *res = &intbss->pub;
3228         void *hdr;
3229         struct nlattr *bss;
3230         int i;
3231
3232         ASSERT_WDEV_LOCK(wdev);
3233
3234         hdr = nl80211hdr_put(msg, pid, seq, flags,
3235                              NL80211_CMD_NEW_SCAN_RESULTS);
3236         if (!hdr)
3237                 return -1;
3238
3239         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3240         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3241
3242         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3243         if (!bss)
3244                 goto nla_put_failure;
3245         if (!is_zero_ether_addr(res->bssid))
3246                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3247         if (res->information_elements && res->len_information_elements)
3248                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3249                         res->len_information_elements,
3250                         res->information_elements);
3251         if (res->beacon_ies && res->len_beacon_ies &&
3252             res->beacon_ies != res->information_elements)
3253                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3254                         res->len_beacon_ies, res->beacon_ies);
3255         if (res->tsf)
3256                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3257         if (res->beacon_interval)
3258                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3259         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3260         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3261         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3262                 jiffies_to_msecs(jiffies - intbss->ts));
3263
3264         switch (rdev->wiphy.signal_type) {
3265         case CFG80211_SIGNAL_TYPE_MBM:
3266                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3267                 break;
3268         case CFG80211_SIGNAL_TYPE_UNSPEC:
3269                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3270                 break;
3271         default:
3272                 break;
3273         }
3274
3275         switch (wdev->iftype) {
3276         case NL80211_IFTYPE_STATION:
3277                 if (intbss == wdev->current_bss)
3278                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3279                                     NL80211_BSS_STATUS_ASSOCIATED);
3280                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3281                         if (intbss != wdev->auth_bsses[i])
3282                                 continue;
3283                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3284                                     NL80211_BSS_STATUS_AUTHENTICATED);
3285                         break;
3286                 }
3287                 break;
3288         case NL80211_IFTYPE_ADHOC:
3289                 if (intbss == wdev->current_bss)
3290                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3291                                     NL80211_BSS_STATUS_IBSS_JOINED);
3292                 break;
3293         default:
3294                 break;
3295         }
3296
3297         nla_nest_end(msg, bss);
3298
3299         return genlmsg_end(msg, hdr);
3300
3301  nla_put_failure:
3302         genlmsg_cancel(msg, hdr);
3303         return -EMSGSIZE;
3304 }
3305
3306 static int nl80211_dump_scan(struct sk_buff *skb,
3307                              struct netlink_callback *cb)
3308 {
3309         struct cfg80211_registered_device *rdev;
3310         struct net_device *dev;
3311         struct cfg80211_internal_bss *scan;
3312         struct wireless_dev *wdev;
3313         int ifidx = cb->args[0];
3314         int start = cb->args[1], idx = 0;
3315         int err;
3316
3317         if (!ifidx)
3318                 ifidx = nl80211_get_ifidx(cb);
3319         if (ifidx < 0)
3320                 return ifidx;
3321         cb->args[0] = ifidx;
3322
3323         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3324         if (!dev)
3325                 return -ENODEV;
3326
3327         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3328         if (IS_ERR(rdev)) {
3329                 err = PTR_ERR(rdev);
3330                 goto out_put_netdev;
3331         }
3332
3333         wdev = dev->ieee80211_ptr;
3334
3335         wdev_lock(wdev);
3336         spin_lock_bh(&rdev->bss_lock);
3337         cfg80211_bss_expire(rdev);
3338
3339         list_for_each_entry(scan, &rdev->bss_list, list) {
3340                 if (++idx <= start)
3341                         continue;
3342                 if (nl80211_send_bss(skb,
3343                                 NETLINK_CB(cb->skb).pid,
3344                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3345                                 rdev, wdev, scan) < 0) {
3346                         idx--;
3347                         goto out;
3348                 }
3349         }
3350
3351  out:
3352         spin_unlock_bh(&rdev->bss_lock);
3353         wdev_unlock(wdev);
3354
3355         cb->args[1] = idx;
3356         err = skb->len;
3357         cfg80211_unlock_rdev(rdev);
3358  out_put_netdev:
3359         dev_put(dev);
3360
3361         return err;
3362 }
3363
3364 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3365                                 int flags, struct net_device *dev,
3366                                 struct survey_info *survey)
3367 {
3368         void *hdr;
3369         struct nlattr *infoattr;
3370
3371         /* Survey without a channel doesn't make sense */
3372         if (!survey->channel)
3373                 return -EINVAL;
3374
3375         hdr = nl80211hdr_put(msg, pid, seq, flags,
3376                              NL80211_CMD_NEW_SURVEY_RESULTS);
3377         if (!hdr)
3378                 return -ENOMEM;
3379
3380         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3381
3382         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3383         if (!infoattr)
3384                 goto nla_put_failure;
3385
3386         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3387                     survey->channel->center_freq);
3388         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3389                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3390                             survey->noise);
3391
3392         nla_nest_end(msg, infoattr);
3393
3394         return genlmsg_end(msg, hdr);
3395
3396  nla_put_failure:
3397         genlmsg_cancel(msg, hdr);
3398         return -EMSGSIZE;
3399 }
3400
3401 static int nl80211_dump_survey(struct sk_buff *skb,
3402                         struct netlink_callback *cb)
3403 {
3404         struct survey_info survey;
3405         struct cfg80211_registered_device *dev;
3406         struct net_device *netdev;
3407         int ifidx = cb->args[0];
3408         int survey_idx = cb->args[1];
3409         int res;
3410
3411         if (!ifidx)
3412                 ifidx = nl80211_get_ifidx(cb);
3413         if (ifidx < 0)
3414                 return ifidx;
3415         cb->args[0] = ifidx;
3416
3417         rtnl_lock();
3418
3419         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3420         if (!netdev) {
3421                 res = -ENODEV;
3422                 goto out_rtnl;
3423         }
3424
3425         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3426         if (IS_ERR(dev)) {
3427                 res = PTR_ERR(dev);
3428                 goto out_rtnl;
3429         }
3430
3431         if (!dev->ops->dump_survey) {
3432                 res = -EOPNOTSUPP;
3433                 goto out_err;
3434         }
3435
3436         while (1) {
3437                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3438                                             &survey);
3439                 if (res == -ENOENT)
3440                         break;
3441                 if (res)
3442                         goto out_err;
3443
3444                 if (nl80211_send_survey(skb,
3445                                 NETLINK_CB(cb->skb).pid,
3446                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3447                                 netdev,
3448                                 &survey) < 0)
3449                         goto out;
3450                 survey_idx++;
3451         }
3452
3453  out:
3454         cb->args[1] = survey_idx;
3455         res = skb->len;
3456  out_err:
3457         cfg80211_unlock_rdev(dev);
3458  out_rtnl:
3459         rtnl_unlock();
3460
3461         return res;
3462 }
3463
3464 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3465 {
3466         return auth_type <= NL80211_AUTHTYPE_MAX;
3467 }
3468
3469 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3470 {
3471         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3472                                   NL80211_WPA_VERSION_2));
3473 }
3474
3475 static bool nl80211_valid_akm_suite(u32 akm)
3476 {
3477         return akm == WLAN_AKM_SUITE_8021X ||
3478                 akm == WLAN_AKM_SUITE_PSK;
3479 }
3480
3481 static bool nl80211_valid_cipher_suite(u32 cipher)
3482 {
3483         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3484                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3485                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3486                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3487                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3488 }
3489
3490
3491 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3492 {
3493         struct cfg80211_registered_device *rdev;
3494         struct net_device *dev;
3495         struct ieee80211_channel *chan;
3496         const u8 *bssid, *ssid, *ie = NULL;
3497         int err, ssid_len, ie_len = 0;
3498         enum nl80211_auth_type auth_type;
3499         struct key_parse key;
3500         bool local_state_change;
3501
3502         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3503                 return -EINVAL;
3504
3505         if (!info->attrs[NL80211_ATTR_MAC])
3506                 return -EINVAL;
3507
3508         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3509                 return -EINVAL;
3510
3511         if (!info->attrs[NL80211_ATTR_SSID])
3512                 return -EINVAL;
3513
3514         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3515                 return -EINVAL;
3516
3517         err = nl80211_parse_key(info, &key);
3518         if (err)
3519                 return err;
3520
3521         if (key.idx >= 0) {
3522                 if (!key.p.key || !key.p.key_len)
3523                         return -EINVAL;
3524                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3525                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3526                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3527                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3528                         return -EINVAL;
3529                 if (key.idx > 4)
3530                         return -EINVAL;
3531         } else {
3532                 key.p.key_len = 0;
3533                 key.p.key = NULL;
3534         }
3535
3536         rtnl_lock();
3537
3538         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3539         if (err)
3540                 goto unlock_rtnl;
3541
3542         if (!rdev->ops->auth) {
3543                 err = -EOPNOTSUPP;
3544                 goto out;
3545         }
3546
3547         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3548                 err = -EOPNOTSUPP;
3549                 goto out;
3550         }
3551
3552         if (!netif_running(dev)) {
3553                 err = -ENETDOWN;
3554                 goto out;
3555         }
3556
3557         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3558         chan = ieee80211_get_channel(&rdev->wiphy,
3559                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3560         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3561                 err = -EINVAL;
3562                 goto out;
3563         }
3564
3565         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3566         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3567
3568         if (info->attrs[NL80211_ATTR_IE]) {
3569                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3570                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3571         }
3572
3573         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3574         if (!nl80211_valid_auth_type(auth_type)) {
3575                 err = -EINVAL;
3576                 goto out;
3577         }
3578
3579         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3580
3581         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3582                                  ssid, ssid_len, ie, ie_len,
3583                                  key.p.key, key.p.key_len, key.idx,
3584                                  local_state_change);
3585
3586 out:
3587         cfg80211_unlock_rdev(rdev);
3588         dev_put(dev);
3589 unlock_rtnl:
3590         rtnl_unlock();
3591         return err;
3592 }
3593
3594 static int nl80211_crypto_settings(struct genl_info *info,
3595                                    struct cfg80211_crypto_settings *settings,
3596                                    int cipher_limit)
3597 {
3598         memset(settings, 0, sizeof(*settings));
3599
3600         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3601
3602         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3603                 void *data;
3604                 int len, i;
3605
3606                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3607                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3608                 settings->n_ciphers_pairwise = len / sizeof(u32);
3609
3610                 if (len % sizeof(u32))
3611                         return -EINVAL;
3612
3613                 if (settings->n_ciphers_pairwise > cipher_limit)
3614                         return -EINVAL;
3615
3616                 memcpy(settings->ciphers_pairwise, data, len);
3617
3618                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3619                         if (!nl80211_valid_cipher_suite(
3620                                         settings->ciphers_pairwise[i]))
3621                                 return -EINVAL;
3622         }
3623
3624         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3625                 settings->cipher_group =
3626                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3627                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3628                         return -EINVAL;
3629         }
3630
3631         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3632                 settings->wpa_versions =
3633                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3634                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3635                         return -EINVAL;
3636         }
3637
3638         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3639                 void *data;
3640                 int len, i;
3641
3642                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3643                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3644                 settings->n_akm_suites = len / sizeof(u32);
3645
3646                 if (len % sizeof(u32))
3647                         return -EINVAL;
3648
3649                 memcpy(settings->akm_suites, data, len);
3650
3651                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3652                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3653                                 return -EINVAL;
3654         }
3655
3656         return 0;
3657 }
3658
3659 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3660 {
3661         struct cfg80211_registered_device *rdev;
3662         struct net_device *dev;
3663         struct cfg80211_crypto_settings crypto;
3664         struct ieee80211_channel *chan;
3665         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3666         int err, ssid_len, ie_len = 0;
3667         bool use_mfp = false;
3668
3669         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3670                 return -EINVAL;
3671
3672         if (!info->attrs[NL80211_ATTR_MAC] ||
3673             !info->attrs[NL80211_ATTR_SSID] ||
3674             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3675                 return -EINVAL;
3676
3677         rtnl_lock();
3678
3679         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3680         if (err)
3681                 goto unlock_rtnl;
3682
3683         if (!rdev->ops->assoc) {
3684                 err = -EOPNOTSUPP;
3685                 goto out;
3686         }
3687
3688         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3689                 err = -EOPNOTSUPP;
3690                 goto out;
3691         }
3692
3693         if (!netif_running(dev)) {
3694                 err = -ENETDOWN;
3695                 goto out;
3696         }
3697
3698         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3699
3700         chan = ieee80211_get_channel(&rdev->wiphy,
3701                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3702         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3703                 err = -EINVAL;
3704                 goto out;
3705         }
3706
3707         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3708         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3709
3710         if (info->attrs[NL80211_ATTR_IE]) {
3711                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3712                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3713         }
3714
3715         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3716                 enum nl80211_mfp mfp =
3717                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3718                 if (mfp == NL80211_MFP_REQUIRED)
3719                         use_mfp = true;
3720                 else if (mfp != NL80211_MFP_NO) {
3721                         err = -EINVAL;
3722                         goto out;
3723                 }
3724         }
3725
3726         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3727                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3728
3729         err = nl80211_crypto_settings(info, &crypto, 1);
3730         if (!err)
3731                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3732                                           ssid, ssid_len, ie, ie_len, use_mfp,
3733                                           &crypto);
3734
3735 out:
3736         cfg80211_unlock_rdev(rdev);
3737         dev_put(dev);
3738 unlock_rtnl:
3739         rtnl_unlock();
3740         return err;
3741 }
3742
3743 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3744 {
3745         struct cfg80211_registered_device *rdev;
3746         struct net_device *dev;
3747         const u8 *ie = NULL, *bssid;
3748         int err, ie_len = 0;
3749         u16 reason_code;
3750         bool local_state_change;
3751
3752         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3753                 return -EINVAL;
3754
3755         if (!info->attrs[NL80211_ATTR_MAC])
3756                 return -EINVAL;
3757
3758         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3759                 return -EINVAL;
3760
3761         rtnl_lock();
3762
3763         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3764         if (err)
3765                 goto unlock_rtnl;
3766
3767         if (!rdev->ops->deauth) {
3768                 err = -EOPNOTSUPP;
3769                 goto out;
3770         }
3771
3772         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3773                 err = -EOPNOTSUPP;
3774                 goto out;
3775         }
3776
3777         if (!netif_running(dev)) {
3778                 err = -ENETDOWN;
3779                 goto out;
3780         }
3781
3782         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3783
3784         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3785         if (reason_code == 0) {
3786                 /* Reason Code 0 is reserved */
3787                 err = -EINVAL;
3788                 goto out;
3789         }
3790
3791         if (info->attrs[NL80211_ATTR_IE]) {
3792                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3793                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3794         }
3795
3796         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3797
3798         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3799                                    local_state_change);
3800
3801 out:
3802         cfg80211_unlock_rdev(rdev);
3803         dev_put(dev);
3804 unlock_rtnl:
3805         rtnl_unlock();
3806         return err;
3807 }
3808
3809 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3810 {
3811         struct cfg80211_registered_device *rdev;
3812         struct net_device *dev;
3813         const u8 *ie = NULL, *bssid;
3814         int err, ie_len = 0;
3815         u16 reason_code;
3816         bool local_state_change;
3817
3818         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3819                 return -EINVAL;
3820
3821         if (!info->attrs[NL80211_ATTR_MAC])
3822                 return -EINVAL;
3823
3824         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3825                 return -EINVAL;
3826
3827         rtnl_lock();
3828
3829         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3830         if (err)
3831                 goto unlock_rtnl;
3832
3833         if (!rdev->ops->disassoc) {
3834                 err = -EOPNOTSUPP;
3835                 goto out;
3836         }
3837
3838         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3839                 err = -EOPNOTSUPP;
3840                 goto out;
3841         }
3842
3843         if (!netif_running(dev)) {
3844                 err = -ENETDOWN;
3845                 goto out;
3846         }
3847
3848         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3849
3850         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3851         if (reason_code == 0) {
3852                 /* Reason Code 0 is reserved */
3853                 err = -EINVAL;
3854                 goto out;
3855         }
3856
3857         if (info->attrs[NL80211_ATTR_IE]) {
3858                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3859                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3860         }
3861
3862         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3863
3864         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
3865                                      local_state_change);
3866
3867 out:
3868         cfg80211_unlock_rdev(rdev);
3869         dev_put(dev);
3870 unlock_rtnl:
3871         rtnl_unlock();
3872         return err;
3873 }
3874
3875 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3876 {
3877         struct cfg80211_registered_device *rdev;
3878         struct net_device *dev;
3879         struct cfg80211_ibss_params ibss;
3880         struct wiphy *wiphy;
3881         struct cfg80211_cached_keys *connkeys = NULL;
3882         int err;
3883
3884         memset(&ibss, 0, sizeof(ibss));
3885
3886         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3887                 return -EINVAL;
3888
3889         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3890             !info->attrs[NL80211_ATTR_SSID] ||
3891             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3892                 return -EINVAL;
3893
3894         ibss.beacon_interval = 100;
3895
3896         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3897                 ibss.beacon_interval =
3898                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3899                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3900                         return -EINVAL;
3901         }
3902
3903         rtnl_lock();
3904
3905         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3906         if (err)
3907                 goto unlock_rtnl;
3908
3909         if (!rdev->ops->join_ibss) {
3910                 err = -EOPNOTSUPP;
3911                 goto out;
3912         }
3913
3914         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3915                 err = -EOPNOTSUPP;
3916                 goto out;
3917         }
3918
3919         if (!netif_running(dev)) {
3920                 err = -ENETDOWN;
3921                 goto out;
3922         }
3923
3924         wiphy = &rdev->wiphy;
3925
3926         if (info->attrs[NL80211_ATTR_MAC])
3927                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3928         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3929         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3930
3931         if (info->attrs[NL80211_ATTR_IE]) {
3932                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3933                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3934         }
3935
3936         ibss.channel = ieee80211_get_channel(wiphy,
3937                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3938         if (!ibss.channel ||
3939             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3940             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3941                 err = -EINVAL;
3942                 goto out;
3943         }
3944
3945         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3946         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
3947
3948         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
3949                 connkeys = nl80211_parse_connkeys(rdev,
3950                                         info->attrs[NL80211_ATTR_KEYS]);
3951                 if (IS_ERR(connkeys)) {
3952                         err = PTR_ERR(connkeys);
3953                         connkeys = NULL;
3954                         goto out;
3955                 }
3956         }
3957
3958         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
3959
3960 out:
3961         cfg80211_unlock_rdev(rdev);
3962         dev_put(dev);
3963 unlock_rtnl:
3964         if (err)
3965                 kfree(connkeys);
3966         rtnl_unlock();
3967         return err;
3968 }
3969
3970 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3971 {
3972         struct cfg80211_registered_device *rdev;
3973         struct net_device *dev;
3974         int err;
3975
3976         rtnl_lock();
3977
3978         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3979         if (err)
3980                 goto unlock_rtnl;
3981
3982         if (!rdev->ops->leave_ibss) {
3983                 err = -EOPNOTSUPP;
3984                 goto out;
3985         }
3986
3987         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3988                 err = -EOPNOTSUPP;
3989                 goto out;
3990         }
3991
3992         if (!netif_running(dev)) {
3993                 err = -ENETDOWN;
3994                 goto out;
3995         }
3996
3997         err = cfg80211_leave_ibss(rdev, dev, false);
3998
3999 out:
4000         cfg80211_unlock_rdev(rdev);
4001         dev_put(dev);
4002 unlock_rtnl:
4003         rtnl_unlock();
4004         return err;
4005 }
4006
4007 #ifdef CONFIG_NL80211_TESTMODE
4008 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4009         .name = "testmode",
4010 };
4011
4012 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4013 {
4014         struct cfg80211_registered_device *rdev;
4015         int err;
4016
4017         if (!info->attrs[NL80211_ATTR_TESTDATA])
4018                 return -EINVAL;
4019
4020         rtnl_lock();
4021
4022         rdev = cfg80211_get_dev_from_info(info);
4023         if (IS_ERR(rdev)) {
4024                 err = PTR_ERR(rdev);
4025                 goto unlock_rtnl;
4026         }
4027
4028         err = -EOPNOTSUPP;
4029         if (rdev->ops->testmode_cmd) {
4030                 rdev->testmode_info = info;
4031                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4032                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4033                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4034                 rdev->testmode_info = NULL;
4035         }
4036
4037         cfg80211_unlock_rdev(rdev);
4038
4039  unlock_rtnl:
4040         rtnl_unlock();
4041         return err;
4042 }
4043
4044 static struct sk_buff *
4045 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4046                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4047 {
4048         struct sk_buff *skb;
4049         void *hdr;
4050         struct nlattr *data;
4051
4052         skb = nlmsg_new(approxlen + 100, gfp);
4053         if (!skb)
4054                 return NULL;
4055
4056         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4057         if (!hdr) {
4058                 kfree_skb(skb);
4059                 return NULL;
4060         }
4061
4062         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4063         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4064
4065         ((void **)skb->cb)[0] = rdev;
4066         ((void **)skb->cb)[1] = hdr;
4067         ((void **)skb->cb)[2] = data;
4068
4069         return skb;
4070
4071  nla_put_failure:
4072         kfree_skb(skb);
4073         return NULL;
4074 }
4075
4076 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4077                                                   int approxlen)
4078 {
4079         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4080
4081         if (WARN_ON(!rdev->testmode_info))
4082                 return NULL;
4083
4084         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4085                                 rdev->testmode_info->snd_pid,
4086                                 rdev->testmode_info->snd_seq,
4087                                 GFP_KERNEL);
4088 }
4089 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4090
4091 int cfg80211_testmode_reply(struct sk_buff *skb)
4092 {
4093         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4094         void *hdr = ((void **)skb->cb)[1];
4095         struct nlattr *data = ((void **)skb->cb)[2];
4096
4097         if (WARN_ON(!rdev->testmode_info)) {
4098                 kfree_skb(skb);
4099                 return -EINVAL;
4100         }
4101
4102         nla_nest_end(skb, data);
4103         genlmsg_end(skb, hdr);
4104         return genlmsg_reply(skb, rdev->testmode_info);
4105 }
4106 EXPORT_SYMBOL(cfg80211_testmode_reply);
4107
4108 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4109                                                   int approxlen, gfp_t gfp)
4110 {
4111         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4112
4113         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4114 }
4115 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4116
4117 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4118 {
4119         void *hdr = ((void **)skb->cb)[1];
4120         struct nlattr *data = ((void **)skb->cb)[2];
4121
4122         nla_nest_end(skb, data);
4123         genlmsg_end(skb, hdr);
4124         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4125 }
4126 EXPORT_SYMBOL(cfg80211_testmode_event);
4127 #endif
4128
4129 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4130 {
4131         struct cfg80211_registered_device *rdev;
4132         struct net_device *dev;
4133         struct cfg80211_connect_params connect;
4134         struct wiphy *wiphy;
4135         struct cfg80211_cached_keys *connkeys = NULL;
4136         int err;
4137
4138         memset(&connect, 0, sizeof(connect));
4139
4140         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4141                 return -EINVAL;
4142
4143         if (!info->attrs[NL80211_ATTR_SSID] ||
4144             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4145                 return -EINVAL;
4146
4147         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4148                 connect.auth_type =
4149                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4150                 if (!nl80211_valid_auth_type(connect.auth_type))
4151                         return -EINVAL;
4152         } else
4153                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4154
4155         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4156
4157         err = nl80211_crypto_settings(info, &connect.crypto,
4158                                       NL80211_MAX_NR_CIPHER_SUITES);
4159         if (err)
4160                 return err;
4161         rtnl_lock();
4162
4163         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4164         if (err)
4165                 goto unlock_rtnl;
4166
4167         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4168                 err = -EOPNOTSUPP;
4169                 goto out;
4170         }
4171
4172         if (!netif_running(dev)) {
4173                 err = -ENETDOWN;
4174                 goto out;
4175         }
4176
4177         wiphy = &rdev->wiphy;
4178
4179         if (info->attrs[NL80211_ATTR_MAC])
4180                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4181         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4182         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4183
4184         if (info->attrs[NL80211_ATTR_IE]) {
4185                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4186                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4187         }
4188
4189         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4190                 connect.channel =
4191                         ieee80211_get_channel(wiphy,
4192                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4193                 if (!connect.channel ||
4194                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4195                         err = -EINVAL;
4196                         goto out;
4197                 }
4198         }
4199
4200         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4201                 connkeys = nl80211_parse_connkeys(rdev,
4202                                         info->attrs[NL80211_ATTR_KEYS]);
4203                 if (IS_ERR(connkeys)) {
4204                         err = PTR_ERR(connkeys);
4205                         connkeys = NULL;
4206                         goto out;
4207                 }
4208         }
4209
4210         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4211
4212 out:
4213         cfg80211_unlock_rdev(rdev);
4214         dev_put(dev);
4215 unlock_rtnl:
4216         if (err)
4217                 kfree(connkeys);
4218         rtnl_unlock();
4219         return err;
4220 }
4221
4222 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4223 {
4224         struct cfg80211_registered_device *rdev;
4225         struct net_device *dev;
4226         int err;
4227         u16 reason;
4228
4229         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4230                 reason = WLAN_REASON_DEAUTH_LEAVING;
4231         else
4232                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4233
4234         if (reason == 0)
4235                 return -EINVAL;
4236
4237         rtnl_lock();
4238
4239         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4240         if (err)
4241                 goto unlock_rtnl;
4242
4243         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4244                 err = -EOPNOTSUPP;
4245                 goto out;
4246         }
4247
4248         if (!netif_running(dev)) {
4249                 err = -ENETDOWN;
4250                 goto out;
4251         }
4252
4253         err = cfg80211_disconnect(rdev, dev, reason, true);
4254
4255 out:
4256         cfg80211_unlock_rdev(rdev);
4257         dev_put(dev);
4258 unlock_rtnl:
4259         rtnl_unlock();
4260         return err;
4261 }
4262
4263 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4264 {
4265         struct cfg80211_registered_device *rdev;
4266         struct net *net;
4267         int err;
4268         u32 pid;
4269
4270         if (!info->attrs[NL80211_ATTR_PID])
4271                 return -EINVAL;
4272
4273         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4274
4275         rtnl_lock();
4276
4277         rdev = cfg80211_get_dev_from_info(info);
4278         if (IS_ERR(rdev)) {
4279                 err = PTR_ERR(rdev);
4280                 goto out_rtnl;
4281         }
4282
4283         net = get_net_ns_by_pid(pid);
4284         if (IS_ERR(net)) {
4285                 err = PTR_ERR(net);
4286                 goto out;
4287         }
4288
4289         err = 0;
4290
4291         /* check if anything to do */
4292         if (net_eq(wiphy_net(&rdev->wiphy), net))
4293                 goto out_put_net;
4294
4295         err = cfg80211_switch_netns(rdev, net);
4296  out_put_net:
4297         put_net(net);
4298  out:
4299         cfg80211_unlock_rdev(rdev);
4300  out_rtnl:
4301         rtnl_unlock();
4302         return err;
4303 }
4304
4305 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4306 {
4307         struct cfg80211_registered_device *rdev;
4308         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4309                         struct cfg80211_pmksa *pmksa) = NULL;
4310         int err;
4311         struct net_device *dev;
4312         struct cfg80211_pmksa pmksa;
4313
4314         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4315
4316         if (!info->attrs[NL80211_ATTR_MAC])
4317                 return -EINVAL;
4318
4319         if (!info->attrs[NL80211_ATTR_PMKID])
4320                 return -EINVAL;
4321
4322         rtnl_lock();
4323
4324         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4325         if (err)
4326                 goto out_rtnl;
4327
4328         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4329         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4330
4331         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4332                 err = -EOPNOTSUPP;
4333                 goto out;
4334         }
4335
4336         switch (info->genlhdr->cmd) {
4337         case NL80211_CMD_SET_PMKSA:
4338                 rdev_ops = rdev->ops->set_pmksa;
4339                 break;
4340         case NL80211_CMD_DEL_PMKSA:
4341                 rdev_ops = rdev->ops->del_pmksa;
4342                 break;
4343         default:
4344                 WARN_ON(1);
4345                 break;
4346         }
4347
4348         if (!rdev_ops) {
4349                 err = -EOPNOTSUPP;
4350                 goto out;
4351         }
4352
4353         err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4354
4355  out:
4356         cfg80211_unlock_rdev(rdev);
4357         dev_put(dev);
4358  out_rtnl:
4359         rtnl_unlock();
4360
4361         return err;
4362 }
4363
4364 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4365 {
4366         struct cfg80211_registered_device *rdev;
4367         int err;
4368         struct net_device *dev;
4369
4370         rtnl_lock();
4371
4372         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4373         if (err)
4374                 goto out_rtnl;
4375
4376         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4377                 err = -EOPNOTSUPP;
4378                 goto out;
4379         }
4380
4381         if (!rdev->ops->flush_pmksa) {
4382                 err = -EOPNOTSUPP;
4383                 goto out;
4384         }
4385
4386         err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4387
4388  out:
4389         cfg80211_unlock_rdev(rdev);
4390         dev_put(dev);
4391  out_rtnl:
4392         rtnl_unlock();
4393
4394         return err;
4395
4396 }
4397
4398 static int nl80211_remain_on_channel(struct sk_buff *skb,
4399                                      struct genl_info *info)
4400 {
4401         struct cfg80211_registered_device *rdev;
4402         struct net_device *dev;
4403         struct ieee80211_channel *chan;
4404         struct sk_buff *msg;
4405         void *hdr;
4406         u64 cookie;
4407         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4408         u32 freq, duration;
4409         int err;
4410
4411         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4412             !info->attrs[NL80211_ATTR_DURATION])
4413                 return -EINVAL;
4414
4415         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4416
4417         /*
4418          * We should be on that channel for at least one jiffie,
4419          * and more than 5 seconds seems excessive.
4420          */
4421         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4422                 return -EINVAL;
4423
4424         rtnl_lock();
4425
4426         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4427         if (err)
4428                 goto unlock_rtnl;
4429
4430         if (!rdev->ops->remain_on_channel) {
4431                 err = -EOPNOTSUPP;
4432                 goto out;
4433         }
4434
4435         if (!netif_running(dev)) {
4436                 err = -ENETDOWN;
4437                 goto out;
4438         }
4439
4440         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4441                 channel_type = nla_get_u32(
4442                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4443                 if (channel_type != NL80211_CHAN_NO_HT &&
4444                     channel_type != NL80211_CHAN_HT20 &&
4445                     channel_type != NL80211_CHAN_HT40PLUS &&
4446                     channel_type != NL80211_CHAN_HT40MINUS) {
4447                         err = -EINVAL;
4448                         goto out;
4449                 }
4450         }
4451
4452         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4453         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4454         if (chan == NULL) {
4455                 err = -EINVAL;
4456                 goto out;
4457         }
4458
4459         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4460         if (!msg) {
4461                 err = -ENOMEM;
4462                 goto out;
4463         }
4464
4465         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4466                              NL80211_CMD_REMAIN_ON_CHANNEL);
4467
4468         if (IS_ERR(hdr)) {
4469                 err = PTR_ERR(hdr);
4470                 goto free_msg;
4471         }
4472
4473         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4474                                            channel_type, duration, &cookie);
4475
4476         if (err)
4477                 goto free_msg;
4478
4479         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4480
4481         genlmsg_end(msg, hdr);
4482         err = genlmsg_reply(msg, info);
4483         goto out;
4484
4485  nla_put_failure:
4486         err = -ENOBUFS;
4487  free_msg:
4488         nlmsg_free(msg);
4489  out:
4490         cfg80211_unlock_rdev(rdev);
4491         dev_put(dev);
4492  unlock_rtnl:
4493         rtnl_unlock();
4494         return err;
4495 }
4496
4497 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4498                                             struct genl_info *info)
4499 {
4500         struct cfg80211_registered_device *rdev;
4501         struct net_device *dev;
4502         u64 cookie;
4503         int err;
4504
4505         if (!info->attrs[NL80211_ATTR_COOKIE])
4506                 return -EINVAL;
4507
4508         rtnl_lock();
4509
4510         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4511         if (err)
4512                 goto unlock_rtnl;
4513
4514         if (!rdev->ops->cancel_remain_on_channel) {
4515                 err = -EOPNOTSUPP;
4516                 goto out;
4517         }
4518
4519         if (!netif_running(dev)) {
4520                 err = -ENETDOWN;
4521                 goto out;
4522         }
4523
4524         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4525
4526         err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4527
4528  out:
4529         cfg80211_unlock_rdev(rdev);
4530         dev_put(dev);
4531  unlock_rtnl:
4532         rtnl_unlock();
4533         return err;
4534 }
4535
4536 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4537                            u8 *rates, u8 rates_len)
4538 {
4539         u8 i;
4540         u32 mask = 0;
4541
4542         for (i = 0; i < rates_len; i++) {
4543                 int rate = (rates[i] & 0x7f) * 5;
4544                 int ridx;
4545                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4546                         struct ieee80211_rate *srate =
4547                                 &sband->bitrates[ridx];
4548                         if (rate == srate->bitrate) {
4549                                 mask |= 1 << ridx;
4550                                 break;
4551                         }
4552                 }
4553                 if (ridx == sband->n_bitrates)
4554                         return 0; /* rate not found */
4555         }
4556
4557         return mask;
4558 }
4559
4560 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4561         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4562                                     .len = NL80211_MAX_SUPP_RATES },
4563 };
4564
4565 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4566                                        struct genl_info *info)
4567 {
4568         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4569         struct cfg80211_registered_device *rdev;
4570         struct cfg80211_bitrate_mask mask;
4571         int err, rem, i;
4572         struct net_device *dev;
4573         struct nlattr *tx_rates;
4574         struct ieee80211_supported_band *sband;
4575
4576         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4577                 return -EINVAL;
4578
4579         rtnl_lock();
4580
4581         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4582         if (err)
4583                 goto unlock_rtnl;
4584
4585         if (!rdev->ops->set_bitrate_mask) {
4586                 err = -EOPNOTSUPP;
4587                 goto unlock;
4588         }
4589
4590         memset(&mask, 0, sizeof(mask));
4591         /* Default to all rates enabled */
4592         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4593                 sband = rdev->wiphy.bands[i];
4594                 mask.control[i].legacy =
4595                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4596         }
4597
4598         /*
4599          * The nested attribute uses enum nl80211_band as the index. This maps
4600          * directly to the enum ieee80211_band values used in cfg80211.
4601          */
4602         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4603         {
4604                 enum ieee80211_band band = nla_type(tx_rates);
4605                 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4606                         err = -EINVAL;
4607                         goto unlock;
4608                 }
4609                 sband = rdev->wiphy.bands[band];
4610                 if (sband == NULL) {
4611                         err = -EINVAL;
4612                         goto unlock;
4613                 }
4614                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4615                           nla_len(tx_rates), nl80211_txattr_policy);
4616                 if (tb[NL80211_TXRATE_LEGACY]) {
4617                         mask.control[band].legacy = rateset_to_mask(
4618                                 sband,
4619                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4620                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4621                         if (mask.control[band].legacy == 0) {
4622                                 err = -EINVAL;
4623                                 goto unlock;
4624                         }
4625                 }
4626         }
4627
4628         err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4629
4630  unlock:
4631         dev_put(dev);
4632         cfg80211_unlock_rdev(rdev);
4633  unlock_rtnl:
4634         rtnl_unlock();
4635         return err;
4636 }
4637
4638 static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
4639 {
4640         struct cfg80211_registered_device *rdev;
4641         struct net_device *dev;
4642         int err;
4643
4644         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4645                 return -EINVAL;
4646
4647         if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
4648                 return -EINVAL;
4649
4650         rtnl_lock();
4651
4652         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4653         if (err)
4654                 goto unlock_rtnl;
4655
4656         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4657                 err = -EOPNOTSUPP;
4658                 goto out;
4659         }
4660
4661         /* not much point in registering if we can't reply */
4662         if (!rdev->ops->action) {
4663                 err = -EOPNOTSUPP;
4664                 goto out;
4665         }
4666
4667         err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
4668                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4669                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4670  out:
4671         cfg80211_unlock_rdev(rdev);
4672         dev_put(dev);
4673  unlock_rtnl:
4674         rtnl_unlock();
4675         return err;
4676 }
4677
4678 static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
4679 {
4680         struct cfg80211_registered_device *rdev;
4681         struct net_device *dev;
4682         struct ieee80211_channel *chan;
4683         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4684         u32 freq;
4685         int err;
4686         void *hdr;
4687         u64 cookie;
4688         struct sk_buff *msg;
4689
4690         if (!info->attrs[NL80211_ATTR_FRAME] ||
4691             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4692                 return -EINVAL;
4693
4694         rtnl_lock();
4695
4696         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4697         if (err)
4698                 goto unlock_rtnl;
4699
4700         if (!rdev->ops->action) {
4701                 err = -EOPNOTSUPP;
4702                 goto out;
4703         }
4704
4705         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
4706                 err = -EOPNOTSUPP;
4707                 goto out;
4708         }
4709
4710         if (!netif_running(dev)) {
4711                 err = -ENETDOWN;
4712                 goto out;
4713         }
4714
4715         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4716                 channel_type = nla_get_u32(
4717                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4718                 if (channel_type != NL80211_CHAN_NO_HT &&
4719                     channel_type != NL80211_CHAN_HT20 &&
4720                     channel_type != NL80211_CHAN_HT40PLUS &&
4721                     channel_type != NL80211_CHAN_HT40MINUS) {
4722                         err = -EINVAL;
4723                         goto out;
4724                 }
4725         }
4726
4727         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4728         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4729         if (chan == NULL) {
4730                 err = -EINVAL;
4731                 goto out;
4732         }
4733
4734         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4735         if (!msg) {
4736                 err = -ENOMEM;
4737                 goto out;
4738         }
4739
4740         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4741                              NL80211_CMD_ACTION);
4742
4743         if (IS_ERR(hdr)) {
4744                 err = PTR_ERR(hdr);
4745                 goto free_msg;
4746         }
4747         err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
4748                                    nla_data(info->attrs[NL80211_ATTR_FRAME]),
4749                                    nla_len(info->attrs[NL80211_ATTR_FRAME]),
4750                                    &cookie);
4751         if (err)
4752                 goto free_msg;
4753
4754         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4755
4756         genlmsg_end(msg, hdr);
4757         err = genlmsg_reply(msg, info);
4758         goto out;
4759
4760  nla_put_failure:
4761         err = -ENOBUFS;
4762  free_msg:
4763         nlmsg_free(msg);
4764  out:
4765         cfg80211_unlock_rdev(rdev);
4766         dev_put(dev);
4767 unlock_rtnl:
4768         rtnl_unlock();
4769         return err;
4770 }
4771
4772 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4773 {
4774         struct cfg80211_registered_device *rdev;
4775         struct wireless_dev *wdev;
4776         struct net_device *dev;
4777         u8 ps_state;
4778         bool state;
4779         int err;
4780
4781         if (!info->attrs[NL80211_ATTR_PS_STATE]) {
4782                 err = -EINVAL;
4783                 goto out;
4784         }
4785
4786         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4787
4788         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
4789                 err = -EINVAL;
4790                 goto out;
4791         }
4792
4793         rtnl_lock();
4794
4795         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4796         if (err)
4797                 goto unlock_rdev;
4798
4799         wdev = dev->ieee80211_ptr;
4800
4801         if (!rdev->ops->set_power_mgmt) {
4802                 err = -EOPNOTSUPP;
4803                 goto unlock_rdev;
4804         }
4805
4806         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4807
4808         if (state == wdev->ps)
4809                 goto unlock_rdev;
4810
4811         wdev->ps = state;
4812
4813         if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
4814                                       wdev->ps_timeout))
4815                 /* assume this means it's off */
4816                 wdev->ps = false;
4817
4818 unlock_rdev:
4819         cfg80211_unlock_rdev(rdev);
4820         dev_put(dev);
4821         rtnl_unlock();
4822
4823 out:
4824         return err;
4825 }
4826
4827 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
4828 {
4829         struct cfg80211_registered_device *rdev;
4830         enum nl80211_ps_state ps_state;
4831         struct wireless_dev *wdev;
4832         struct net_device *dev;
4833         struct sk_buff *msg;
4834         void *hdr;
4835         int err;
4836
4837         rtnl_lock();
4838
4839         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4840         if (err)
4841                 goto unlock_rtnl;
4842
4843         wdev = dev->ieee80211_ptr;
4844
4845         if (!rdev->ops->set_power_mgmt) {
4846                 err = -EOPNOTSUPP;
4847                 goto out;
4848         }
4849
4850         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4851         if (!msg) {
4852                 err = -ENOMEM;
4853                 goto out;
4854         }
4855
4856         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4857                              NL80211_CMD_GET_POWER_SAVE);
4858         if (!hdr) {
4859                 err = -ENOMEM;
4860                 goto free_msg;
4861         }
4862
4863         if (wdev->ps)
4864                 ps_state = NL80211_PS_ENABLED;
4865         else
4866                 ps_state = NL80211_PS_DISABLED;
4867
4868         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
4869
4870         genlmsg_end(msg, hdr);
4871         err = genlmsg_reply(msg, info);
4872         goto out;
4873
4874 nla_put_failure:
4875         err = -ENOBUFS;
4876
4877 free_msg:
4878         nlmsg_free(msg);
4879
4880 out:
4881         cfg80211_unlock_rdev(rdev);
4882         dev_put(dev);
4883
4884 unlock_rtnl:
4885         rtnl_unlock();
4886
4887         return err;
4888 }
4889
4890 static struct nla_policy
4891 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
4892         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
4893         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
4894         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
4895 };
4896
4897 static int nl80211_set_cqm_rssi(struct genl_info *info,
4898                                 s32 threshold, u32 hysteresis)
4899 {
4900         struct cfg80211_registered_device *rdev;
4901         struct wireless_dev *wdev;
4902         struct net_device *dev;
4903         int err;
4904
4905         if (threshold > 0)
4906                 return -EINVAL;
4907
4908         rtnl_lock();
4909
4910         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4911         if (err)
4912                 goto unlock_rdev;
4913
4914         wdev = dev->ieee80211_ptr;
4915
4916         if (!rdev->ops->set_cqm_rssi_config) {
4917                 err = -EOPNOTSUPP;
4918                 goto unlock_rdev;
4919         }
4920
4921         if (wdev->iftype != NL80211_IFTYPE_STATION) {
4922                 err = -EOPNOTSUPP;
4923                 goto unlock_rdev;
4924         }
4925
4926         err = rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
4927                                              threshold, hysteresis);
4928
4929 unlock_rdev:
4930         cfg80211_unlock_rdev(rdev);
4931         dev_put(dev);
4932         rtnl_unlock();
4933
4934         return err;
4935 }
4936
4937 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
4938 {
4939         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
4940         struct nlattr *cqm;
4941         int err;
4942
4943         cqm = info->attrs[NL80211_ATTR_CQM];
4944         if (!cqm) {
4945                 err = -EINVAL;
4946                 goto out;
4947         }
4948
4949         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
4950                                nl80211_attr_cqm_policy);
4951         if (err)
4952                 goto out;
4953
4954         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
4955             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
4956                 s32 threshold;
4957                 u32 hysteresis;
4958                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
4959                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
4960                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
4961         } else
4962                 err = -EINVAL;
4963
4964 out:
4965         return err;
4966 }
4967
4968 static struct genl_ops nl80211_ops[] = {
4969         {
4970                 .cmd = NL80211_CMD_GET_WIPHY,
4971                 .doit = nl80211_get_wiphy,
4972                 .dumpit = nl80211_dump_wiphy,
4973                 .policy = nl80211_policy,
4974                 /* can be retrieved by unprivileged users */
4975         },
4976         {
4977                 .cmd = NL80211_CMD_SET_WIPHY,
4978                 .doit = nl80211_set_wiphy,
4979                 .policy = nl80211_policy,
4980                 .flags = GENL_ADMIN_PERM,
4981         },
4982         {
4983                 .cmd = NL80211_CMD_GET_INTERFACE,
4984                 .doit = nl80211_get_interface,
4985                 .dumpit = nl80211_dump_interface,
4986                 .policy = nl80211_policy,
4987                 /* can be retrieved by unprivileged users */
4988         },
4989         {
4990                 .cmd = NL80211_CMD_SET_INTERFACE,
4991                 .doit = nl80211_set_interface,
4992                 .policy = nl80211_policy,
4993                 .flags = GENL_ADMIN_PERM,
4994         },
4995         {
4996                 .cmd = NL80211_CMD_NEW_INTERFACE,
4997                 .doit = nl80211_new_interface,
4998                 .policy = nl80211_policy,
4999                 .flags = GENL_ADMIN_PERM,
5000         },
5001         {
5002                 .cmd = NL80211_CMD_DEL_INTERFACE,
5003                 .doit = nl80211_del_interface,
5004                 .policy = nl80211_policy,
5005                 .flags = GENL_ADMIN_PERM,
5006         },
5007         {
5008                 .cmd = NL80211_CMD_GET_KEY,
5009                 .doit = nl80211_get_key,
5010                 .policy = nl80211_policy,
5011                 .flags = GENL_ADMIN_PERM,
5012         },
5013         {
5014                 .cmd = NL80211_CMD_SET_KEY,
5015                 .doit = nl80211_set_key,
5016                 .policy = nl80211_policy,
5017                 .flags = GENL_ADMIN_PERM,
5018         },
5019         {
5020                 .cmd = NL80211_CMD_NEW_KEY,
5021                 .doit = nl80211_new_key,
5022                 .policy = nl80211_policy,
5023                 .flags = GENL_ADMIN_PERM,
5024         },
5025         {
5026                 .cmd = NL80211_CMD_DEL_KEY,
5027                 .doit = nl80211_del_key,
5028                 .policy = nl80211_policy,
5029                 .flags = GENL_ADMIN_PERM,
5030         },
5031         {
5032                 .cmd = NL80211_CMD_SET_BEACON,
5033                 .policy = nl80211_policy,
5034                 .flags = GENL_ADMIN_PERM,
5035                 .doit = nl80211_addset_beacon,
5036         },
5037         {
5038                 .cmd = NL80211_CMD_NEW_BEACON,
5039                 .policy = nl80211_policy,
5040                 .flags = GENL_ADMIN_PERM,
5041                 .doit = nl80211_addset_beacon,
5042         },
5043         {
5044                 .cmd = NL80211_CMD_DEL_BEACON,
5045                 .policy = nl80211_policy,
5046                 .flags = GENL_ADMIN_PERM,
5047                 .doit = nl80211_del_beacon,
5048         },
5049         {
5050                 .cmd = NL80211_CMD_GET_STATION,
5051                 .doit = nl80211_get_station,
5052                 .dumpit = nl80211_dump_station,
5053                 .policy = nl80211_policy,
5054         },
5055         {
5056                 .cmd = NL80211_CMD_SET_STATION,
5057                 .doit = nl80211_set_station,
5058                 .policy = nl80211_policy,
5059                 .flags = GENL_ADMIN_PERM,
5060         },
5061         {
5062                 .cmd = NL80211_CMD_NEW_STATION,
5063                 .doit = nl80211_new_station,
5064                 .policy = nl80211_policy,
5065                 .flags = GENL_ADMIN_PERM,
5066         },
5067         {
5068                 .cmd = NL80211_CMD_DEL_STATION,
5069                 .doit = nl80211_del_station,
5070                 .policy = nl80211_policy,
5071                 .flags = GENL_ADMIN_PERM,
5072         },
5073         {
5074                 .cmd = NL80211_CMD_GET_MPATH,
5075                 .doit = nl80211_get_mpath,
5076                 .dumpit = nl80211_dump_mpath,
5077                 .policy = nl80211_policy,
5078                 .flags = GENL_ADMIN_PERM,
5079         },
5080         {
5081                 .cmd = NL80211_CMD_SET_MPATH,
5082                 .doit = nl80211_set_mpath,
5083                 .policy = nl80211_policy,
5084                 .flags = GENL_ADMIN_PERM,
5085         },
5086         {
5087                 .cmd = NL80211_CMD_NEW_MPATH,
5088                 .doit = nl80211_new_mpath,
5089                 .policy = nl80211_policy,
5090                 .flags = GENL_ADMIN_PERM,
5091         },
5092         {
5093                 .cmd = NL80211_CMD_DEL_MPATH,
5094                 .doit = nl80211_del_mpath,
5095                 .policy = nl80211_policy,
5096                 .flags = GENL_ADMIN_PERM,
5097         },
5098         {
5099                 .cmd = NL80211_CMD_SET_BSS,
5100                 .doit = nl80211_set_bss,
5101                 .policy = nl80211_policy,
5102                 .flags = GENL_ADMIN_PERM,
5103         },
5104         {
5105                 .cmd = NL80211_CMD_GET_REG,
5106                 .doit = nl80211_get_reg,
5107                 .policy = nl80211_policy,
5108                 /* can be retrieved by unprivileged users */
5109         },
5110         {
5111                 .cmd = NL80211_CMD_SET_REG,
5112                 .doit = nl80211_set_reg,
5113                 .policy = nl80211_policy,
5114                 .flags = GENL_ADMIN_PERM,
5115         },
5116         {
5117                 .cmd = NL80211_CMD_REQ_SET_REG,
5118                 .doit = nl80211_req_set_reg,
5119                 .policy = nl80211_policy,
5120                 .flags = GENL_ADMIN_PERM,
5121         },
5122         {
5123                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
5124                 .doit = nl80211_get_mesh_params,
5125                 .policy = nl80211_policy,
5126                 /* can be retrieved by unprivileged users */
5127         },
5128         {
5129                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
5130                 .doit = nl80211_set_mesh_params,
5131                 .policy = nl80211_policy,
5132                 .flags = GENL_ADMIN_PERM,
5133         },
5134         {
5135                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5136                 .doit = nl80211_trigger_scan,
5137                 .policy = nl80211_policy,
5138                 .flags = GENL_ADMIN_PERM,
5139         },
5140         {
5141                 .cmd = NL80211_CMD_GET_SCAN,
5142                 .policy = nl80211_policy,
5143                 .dumpit = nl80211_dump_scan,
5144         },
5145         {
5146                 .cmd = NL80211_CMD_AUTHENTICATE,
5147                 .doit = nl80211_authenticate,
5148                 .policy = nl80211_policy,
5149                 .flags = GENL_ADMIN_PERM,
5150         },
5151         {
5152                 .cmd = NL80211_CMD_ASSOCIATE,
5153                 .doit = nl80211_associate,
5154                 .policy = nl80211_policy,
5155                 .flags = GENL_ADMIN_PERM,
5156         },
5157         {
5158                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5159                 .doit = nl80211_deauthenticate,
5160                 .policy = nl80211_policy,
5161                 .flags = GENL_ADMIN_PERM,
5162         },
5163         {
5164                 .cmd = NL80211_CMD_DISASSOCIATE,
5165                 .doit = nl80211_disassociate,
5166                 .policy = nl80211_policy,
5167                 .flags = GENL_ADMIN_PERM,
5168         },
5169         {
5170                 .cmd = NL80211_CMD_JOIN_IBSS,
5171                 .doit = nl80211_join_ibss,
5172                 .policy = nl80211_policy,
5173                 .flags = GENL_ADMIN_PERM,
5174         },
5175         {
5176                 .cmd = NL80211_CMD_LEAVE_IBSS,
5177                 .doit = nl80211_leave_ibss,
5178                 .policy = nl80211_policy,
5179                 .flags = GENL_ADMIN_PERM,
5180         },
5181 #ifdef CONFIG_NL80211_TESTMODE
5182         {
5183                 .cmd = NL80211_CMD_TESTMODE,
5184                 .doit = nl80211_testmode_do,
5185                 .policy = nl80211_policy,
5186                 .flags = GENL_ADMIN_PERM,
5187         },
5188 #endif
5189         {
5190                 .cmd = NL80211_CMD_CONNECT,
5191                 .doit = nl80211_connect,
5192                 .policy = nl80211_policy,
5193                 .flags = GENL_ADMIN_PERM,
5194         },
5195         {
5196                 .cmd = NL80211_CMD_DISCONNECT,
5197                 .doit = nl80211_disconnect,
5198                 .policy = nl80211_policy,
5199                 .flags = GENL_ADMIN_PERM,
5200         },
5201         {
5202                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5203                 .doit = nl80211_wiphy_netns,
5204                 .policy = nl80211_policy,
5205                 .flags = GENL_ADMIN_PERM,
5206         },
5207         {
5208                 .cmd = NL80211_CMD_GET_SURVEY,
5209                 .policy = nl80211_policy,
5210                 .dumpit = nl80211_dump_survey,
5211         },
5212         {
5213                 .cmd = NL80211_CMD_SET_PMKSA,
5214                 .doit = nl80211_setdel_pmksa,
5215                 .policy = nl80211_policy,
5216                 .flags = GENL_ADMIN_PERM,
5217         },
5218         {
5219                 .cmd = NL80211_CMD_DEL_PMKSA,
5220                 .doit = nl80211_setdel_pmksa,
5221                 .policy = nl80211_policy,
5222                 .flags = GENL_ADMIN_PERM,
5223         },
5224         {
5225                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5226                 .doit = nl80211_flush_pmksa,
5227                 .policy = nl80211_policy,
5228                 .flags = GENL_ADMIN_PERM,
5229         },
5230         {
5231                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5232                 .doit = nl80211_remain_on_channel,
5233                 .policy = nl80211_policy,
5234                 .flags = GENL_ADMIN_PERM,
5235         },
5236         {
5237                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5238                 .doit = nl80211_cancel_remain_on_channel,
5239                 .policy = nl80211_policy,
5240                 .flags = GENL_ADMIN_PERM,
5241         },
5242         {
5243                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5244                 .doit = nl80211_set_tx_bitrate_mask,
5245                 .policy = nl80211_policy,
5246                 .flags = GENL_ADMIN_PERM,
5247         },
5248         {
5249                 .cmd = NL80211_CMD_REGISTER_ACTION,
5250                 .doit = nl80211_register_action,
5251                 .policy = nl80211_policy,
5252                 .flags = GENL_ADMIN_PERM,
5253         },
5254         {
5255                 .cmd = NL80211_CMD_ACTION,
5256                 .doit = nl80211_action,
5257                 .policy = nl80211_policy,
5258                 .flags = GENL_ADMIN_PERM,
5259         },
5260         {
5261                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5262                 .doit = nl80211_set_power_save,
5263                 .policy = nl80211_policy,
5264                 .flags = GENL_ADMIN_PERM,
5265         },
5266         {
5267                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5268                 .doit = nl80211_get_power_save,
5269                 .policy = nl80211_policy,
5270                 /* can be retrieved by unprivileged users */
5271         },
5272         {
5273                 .cmd = NL80211_CMD_SET_CQM,
5274                 .doit = nl80211_set_cqm,
5275                 .policy = nl80211_policy,
5276                 .flags = GENL_ADMIN_PERM,
5277         },
5278         {
5279                 .cmd = NL80211_CMD_SET_CHANNEL,
5280                 .doit = nl80211_set_channel,
5281                 .policy = nl80211_policy,
5282                 .flags = GENL_ADMIN_PERM,
5283         },
5284 };
5285
5286 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5287         .name = "mlme",
5288 };
5289
5290 /* multicast groups */
5291 static struct genl_multicast_group nl80211_config_mcgrp = {
5292         .name = "config",
5293 };
5294 static struct genl_multicast_group nl80211_scan_mcgrp = {
5295         .name = "scan",
5296 };
5297 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5298         .name = "regulatory",
5299 };
5300
5301 /* notification functions */
5302
5303 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5304 {
5305         struct sk_buff *msg;
5306
5307         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5308         if (!msg)
5309                 return;
5310
5311         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5312                 nlmsg_free(msg);
5313                 return;
5314         }
5315
5316         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5317                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5318 }
5319
5320 static int nl80211_add_scan_req(struct sk_buff *msg,
5321                                 struct cfg80211_registered_device *rdev)
5322 {
5323         struct cfg80211_scan_request *req = rdev->scan_req;
5324         struct nlattr *nest;
5325         int i;
5326
5327         ASSERT_RDEV_LOCK(rdev);
5328
5329         if (WARN_ON(!req))
5330                 return 0;
5331
5332         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5333         if (!nest)
5334                 goto nla_put_failure;
5335         for (i = 0; i < req->n_ssids; i++)
5336                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5337         nla_nest_end(msg, nest);
5338
5339         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5340         if (!nest)
5341                 goto nla_put_failure;
5342         for (i = 0; i < req->n_channels; i++)
5343                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5344         nla_nest_end(msg, nest);
5345
5346         if (req->ie)
5347                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5348
5349         return 0;
5350  nla_put_failure:
5351         return -ENOBUFS;
5352 }
5353
5354 static int nl80211_send_scan_msg(struct sk_buff *msg,
5355                                  struct cfg80211_registered_device *rdev,
5356                                  struct net_device *netdev,
5357                                  u32 pid, u32 seq, int flags,
5358                                  u32 cmd)
5359 {
5360         void *hdr;
5361
5362         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5363         if (!hdr)
5364                 return -1;
5365
5366         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5367         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5368
5369         /* ignore errors and send incomplete event anyway */
5370         nl80211_add_scan_req(msg, rdev);
5371
5372         return genlmsg_end(msg, hdr);
5373
5374  nla_put_failure:
5375         genlmsg_cancel(msg, hdr);
5376         return -EMSGSIZE;
5377 }
5378
5379 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5380                              struct net_device *netdev)
5381 {
5382         struct sk_buff *msg;
5383
5384         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5385         if (!msg)
5386                 return;
5387
5388         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5389                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5390                 nlmsg_free(msg);
5391                 return;
5392         }
5393
5394         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5395                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5396 }
5397
5398 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5399                             struct net_device *netdev)
5400 {
5401         struct sk_buff *msg;
5402
5403         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5404         if (!msg)
5405                 return;
5406
5407         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5408                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5409                 nlmsg_free(msg);
5410                 return;
5411         }
5412
5413         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5414                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5415 }
5416
5417 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5418                                struct net_device *netdev)
5419 {
5420         struct sk_buff *msg;
5421
5422         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5423         if (!msg)
5424                 return;
5425
5426         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5427                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5428                 nlmsg_free(msg);
5429                 return;
5430         }
5431
5432         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5433                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5434 }
5435
5436 /*
5437  * This can happen on global regulatory changes or device specific settings
5438  * based on custom world regulatory domains.
5439  */
5440 void nl80211_send_reg_change_event(struct regulatory_request *request)
5441 {
5442         struct sk_buff *msg;
5443         void *hdr;
5444
5445         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5446         if (!msg)
5447                 return;
5448
5449         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5450         if (!hdr) {
5451                 nlmsg_free(msg);
5452                 return;
5453         }
5454
5455         /* Userspace can always count this one always being set */
5456         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5457
5458         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5459                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5460                            NL80211_REGDOM_TYPE_WORLD);
5461         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5462                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5463                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5464         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5465                  request->intersect)
5466                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5467                            NL80211_REGDOM_TYPE_INTERSECTION);
5468         else {
5469                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5470                            NL80211_REGDOM_TYPE_COUNTRY);
5471                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5472         }
5473
5474         if (wiphy_idx_valid(request->wiphy_idx))
5475                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5476
5477         if (genlmsg_end(msg, hdr) < 0) {
5478                 nlmsg_free(msg);
5479                 return;
5480         }
5481
5482         rcu_read_lock();
5483         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5484                                 GFP_ATOMIC);
5485         rcu_read_unlock();
5486
5487         return;
5488
5489 nla_put_failure:
5490         genlmsg_cancel(msg, hdr);
5491         nlmsg_free(msg);
5492 }
5493
5494 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5495                                     struct net_device *netdev,
5496                                     const u8 *buf, size_t len,
5497                                     enum nl80211_commands cmd, gfp_t gfp)
5498 {
5499         struct sk_buff *msg;
5500         void *hdr;
5501
5502         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5503         if (!msg)
5504                 return;
5505
5506         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5507         if (!hdr) {
5508                 nlmsg_free(msg);
5509                 return;
5510         }
5511
5512         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5513         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5514         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5515
5516         if (genlmsg_end(msg, hdr) < 0) {
5517                 nlmsg_free(msg);
5518                 return;
5519         }
5520
5521         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5522                                 nl80211_mlme_mcgrp.id, gfp);
5523         return;
5524
5525  nla_put_failure:
5526         genlmsg_cancel(msg, hdr);
5527         nlmsg_free(msg);
5528 }
5529
5530 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5531                           struct net_device *netdev, const u8 *buf,
5532                           size_t len, gfp_t gfp)
5533 {
5534         nl80211_send_mlme_event(rdev, netdev, buf, len,
5535                                 NL80211_CMD_AUTHENTICATE, gfp);
5536 }
5537
5538 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5539                            struct net_device *netdev, const u8 *buf,
5540                            size_t len, gfp_t gfp)
5541 {
5542         nl80211_send_mlme_event(rdev, netdev, buf, len,
5543                                 NL80211_CMD_ASSOCIATE, gfp);
5544 }
5545
5546 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5547                          struct net_device *netdev, const u8 *buf,
5548                          size_t len, gfp_t gfp)
5549 {
5550         nl80211_send_mlme_event(rdev, netdev, buf, len,
5551                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5552 }
5553
5554 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5555                            struct net_device *netdev, const u8 *buf,
5556                            size_t len, gfp_t gfp)
5557 {
5558         nl80211_send_mlme_event(rdev, netdev, buf, len,
5559                                 NL80211_CMD_DISASSOCIATE, gfp);
5560 }
5561
5562 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5563                                       struct net_device *netdev, int cmd,
5564                                       const u8 *addr, gfp_t gfp)
5565 {
5566         struct sk_buff *msg;
5567         void *hdr;
5568
5569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5570         if (!msg)
5571                 return;
5572
5573         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5574         if (!hdr) {
5575                 nlmsg_free(msg);
5576                 return;
5577         }
5578
5579         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5580         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5581         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5582         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5583
5584         if (genlmsg_end(msg, hdr) < 0) {
5585                 nlmsg_free(msg);
5586                 return;
5587         }
5588
5589         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5590                                 nl80211_mlme_mcgrp.id, gfp);
5591         return;
5592
5593  nla_put_failure:
5594         genlmsg_cancel(msg, hdr);
5595         nlmsg_free(msg);
5596 }
5597
5598 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5599                                struct net_device *netdev, const u8 *addr,
5600                                gfp_t gfp)
5601 {
5602         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5603                                   addr, gfp);
5604 }
5605
5606 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5607                                 struct net_device *netdev, const u8 *addr,
5608                                 gfp_t gfp)
5609 {
5610         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5611                                   addr, gfp);
5612 }
5613
5614 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5615                                  struct net_device *netdev, const u8 *bssid,
5616                                  const u8 *req_ie, size_t req_ie_len,
5617                                  const u8 *resp_ie, size_t resp_ie_len,
5618                                  u16 status, gfp_t gfp)
5619 {
5620         struct sk_buff *msg;
5621         void *hdr;
5622
5623         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5624         if (!msg)
5625                 return;
5626
5627         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5628         if (!hdr) {
5629                 nlmsg_free(msg);
5630                 return;
5631         }
5632
5633         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5634         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5635         if (bssid)
5636                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5637         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5638         if (req_ie)
5639                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5640         if (resp_ie)
5641                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5642
5643         if (genlmsg_end(msg, hdr) < 0) {
5644                 nlmsg_free(msg);
5645                 return;
5646         }
5647
5648         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5649                                 nl80211_mlme_mcgrp.id, gfp);
5650         return;
5651
5652  nla_put_failure:
5653         genlmsg_cancel(msg, hdr);
5654         nlmsg_free(msg);
5655
5656 }
5657
5658 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5659                          struct net_device *netdev, const u8 *bssid,
5660                          const u8 *req_ie, size_t req_ie_len,
5661                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5662 {
5663         struct sk_buff *msg;
5664         void *hdr;
5665
5666         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5667         if (!msg)
5668                 return;
5669
5670         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5671         if (!hdr) {
5672                 nlmsg_free(msg);
5673                 return;
5674         }
5675
5676         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5677         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5678         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5679         if (req_ie)
5680                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5681         if (resp_ie)
5682                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5683
5684         if (genlmsg_end(msg, hdr) < 0) {
5685                 nlmsg_free(msg);
5686                 return;
5687         }
5688
5689         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5690                                 nl80211_mlme_mcgrp.id, gfp);
5691         return;
5692
5693  nla_put_failure:
5694         genlmsg_cancel(msg, hdr);
5695         nlmsg_free(msg);
5696
5697 }
5698
5699 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5700                                struct net_device *netdev, u16 reason,
5701                                const u8 *ie, size_t ie_len, bool from_ap)
5702 {
5703         struct sk_buff *msg;
5704         void *hdr;
5705
5706         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5707         if (!msg)
5708                 return;
5709
5710         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5711         if (!hdr) {
5712                 nlmsg_free(msg);
5713                 return;
5714         }
5715
5716         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5717         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5718         if (from_ap && reason)
5719                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5720         if (from_ap)
5721                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5722         if (ie)
5723                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5724
5725         if (genlmsg_end(msg, hdr) < 0) {
5726                 nlmsg_free(msg);
5727                 return;
5728         }
5729
5730         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5731                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5732         return;
5733
5734  nla_put_failure:
5735         genlmsg_cancel(msg, hdr);
5736         nlmsg_free(msg);
5737
5738 }
5739
5740 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5741                              struct net_device *netdev, const u8 *bssid,
5742                              gfp_t gfp)
5743 {
5744         struct sk_buff *msg;
5745         void *hdr;
5746
5747         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5748         if (!msg)
5749                 return;
5750
5751         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5752         if (!hdr) {
5753                 nlmsg_free(msg);
5754                 return;
5755         }
5756
5757         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5758         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5759         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5760
5761         if (genlmsg_end(msg, hdr) < 0) {
5762                 nlmsg_free(msg);
5763                 return;
5764         }
5765
5766         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5767                                 nl80211_mlme_mcgrp.id, gfp);
5768         return;
5769
5770  nla_put_failure:
5771         genlmsg_cancel(msg, hdr);
5772         nlmsg_free(msg);
5773 }
5774
5775 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5776                                  struct net_device *netdev, const u8 *addr,
5777                                  enum nl80211_key_type key_type, int key_id,
5778                                  const u8 *tsc, gfp_t gfp)
5779 {
5780         struct sk_buff *msg;
5781         void *hdr;
5782
5783         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5784         if (!msg)
5785                 return;
5786
5787         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5788         if (!hdr) {
5789                 nlmsg_free(msg);
5790                 return;
5791         }
5792
5793         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5794         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5795         if (addr)
5796                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5797         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5798         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5799         if (tsc)
5800                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5801
5802         if (genlmsg_end(msg, hdr) < 0) {
5803                 nlmsg_free(msg);
5804                 return;
5805         }
5806
5807         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5808                                 nl80211_mlme_mcgrp.id, gfp);
5809         return;
5810
5811  nla_put_failure:
5812         genlmsg_cancel(msg, hdr);
5813         nlmsg_free(msg);
5814 }
5815
5816 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
5817                                     struct ieee80211_channel *channel_before,
5818                                     struct ieee80211_channel *channel_after)
5819 {
5820         struct sk_buff *msg;
5821         void *hdr;
5822         struct nlattr *nl_freq;
5823
5824         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
5825         if (!msg)
5826                 return;
5827
5828         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
5829         if (!hdr) {
5830                 nlmsg_free(msg);
5831                 return;
5832         }
5833
5834         /*
5835          * Since we are applying the beacon hint to a wiphy we know its
5836          * wiphy_idx is valid
5837          */
5838         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
5839
5840         /* Before */
5841         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
5842         if (!nl_freq)
5843                 goto nla_put_failure;
5844         if (nl80211_msg_put_channel(msg, channel_before))
5845                 goto nla_put_failure;
5846         nla_nest_end(msg, nl_freq);
5847
5848         /* After */
5849         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
5850         if (!nl_freq)
5851                 goto nla_put_failure;
5852         if (nl80211_msg_put_channel(msg, channel_after))
5853                 goto nla_put_failure;
5854         nla_nest_end(msg, nl_freq);
5855
5856         if (genlmsg_end(msg, hdr) < 0) {
5857                 nlmsg_free(msg);
5858                 return;
5859         }
5860
5861         rcu_read_lock();
5862         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5863                                 GFP_ATOMIC);
5864         rcu_read_unlock();
5865
5866         return;
5867
5868 nla_put_failure:
5869         genlmsg_cancel(msg, hdr);
5870         nlmsg_free(msg);
5871 }
5872
5873 static void nl80211_send_remain_on_chan_event(
5874         int cmd, struct cfg80211_registered_device *rdev,
5875         struct net_device *netdev, u64 cookie,
5876         struct ieee80211_channel *chan,
5877         enum nl80211_channel_type channel_type,
5878         unsigned int duration, gfp_t gfp)
5879 {
5880         struct sk_buff *msg;
5881         void *hdr;
5882
5883         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5884         if (!msg)
5885                 return;
5886
5887         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5888         if (!hdr) {
5889                 nlmsg_free(msg);
5890                 return;
5891         }
5892
5893         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5894         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5895         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
5896         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
5897         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5898
5899         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
5900                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5901
5902         if (genlmsg_end(msg, hdr) < 0) {
5903                 nlmsg_free(msg);
5904                 return;
5905         }
5906
5907         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5908                                 nl80211_mlme_mcgrp.id, gfp);
5909         return;
5910
5911  nla_put_failure:
5912         genlmsg_cancel(msg, hdr);
5913         nlmsg_free(msg);
5914 }
5915
5916 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
5917                                     struct net_device *netdev, u64 cookie,
5918                                     struct ieee80211_channel *chan,
5919                                     enum nl80211_channel_type channel_type,
5920                                     unsigned int duration, gfp_t gfp)
5921 {
5922         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
5923                                           rdev, netdev, cookie, chan,
5924                                           channel_type, duration, gfp);
5925 }
5926
5927 void nl80211_send_remain_on_channel_cancel(
5928         struct cfg80211_registered_device *rdev, struct net_device *netdev,
5929         u64 cookie, struct ieee80211_channel *chan,
5930         enum nl80211_channel_type channel_type, gfp_t gfp)
5931 {
5932         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5933                                           rdev, netdev, cookie, chan,
5934                                           channel_type, 0, gfp);
5935 }
5936
5937 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
5938                             struct net_device *dev, const u8 *mac_addr,
5939                             struct station_info *sinfo, gfp_t gfp)
5940 {
5941         struct sk_buff *msg;
5942
5943         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5944         if (!msg)
5945                 return;
5946
5947         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
5948                 nlmsg_free(msg);
5949                 return;
5950         }
5951
5952         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5953                                 nl80211_mlme_mcgrp.id, gfp);
5954 }
5955
5956 int nl80211_send_action(struct cfg80211_registered_device *rdev,
5957                         struct net_device *netdev, u32 nlpid,
5958                         int freq, const u8 *buf, size_t len, gfp_t gfp)
5959 {
5960         struct sk_buff *msg;
5961         void *hdr;
5962         int err;
5963
5964         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5965         if (!msg)
5966                 return -ENOMEM;
5967
5968         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
5969         if (!hdr) {
5970                 nlmsg_free(msg);
5971                 return -ENOMEM;
5972         }
5973
5974         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5975         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5976         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5977         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5978
5979         err = genlmsg_end(msg, hdr);
5980         if (err < 0) {
5981                 nlmsg_free(msg);
5982                 return err;
5983         }
5984
5985         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
5986         if (err < 0)
5987                 return err;
5988         return 0;
5989
5990  nla_put_failure:
5991         genlmsg_cancel(msg, hdr);
5992         nlmsg_free(msg);
5993         return -ENOBUFS;
5994 }
5995
5996 void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
5997                                    struct net_device *netdev, u64 cookie,
5998                                    const u8 *buf, size_t len, bool ack,
5999                                    gfp_t gfp)
6000 {
6001         struct sk_buff *msg;
6002         void *hdr;
6003
6004         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6005         if (!msg)
6006                 return;
6007
6008         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
6009         if (!hdr) {
6010                 nlmsg_free(msg);
6011                 return;
6012         }
6013
6014         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6015         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6016         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6017         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6018         if (ack)
6019                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6020
6021         if (genlmsg_end(msg, hdr) < 0) {
6022                 nlmsg_free(msg);
6023                 return;
6024         }
6025
6026         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6027         return;
6028
6029  nla_put_failure:
6030         genlmsg_cancel(msg, hdr);
6031         nlmsg_free(msg);
6032 }
6033
6034 void
6035 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6036                              struct net_device *netdev,
6037                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6038                              gfp_t gfp)
6039 {
6040         struct sk_buff *msg;
6041         struct nlattr *pinfoattr;
6042         void *hdr;
6043
6044         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6045         if (!msg)
6046                 return;
6047
6048         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6049         if (!hdr) {
6050                 nlmsg_free(msg);
6051                 return;
6052         }
6053
6054         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6055         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6056
6057         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6058         if (!pinfoattr)
6059                 goto nla_put_failure;
6060
6061         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6062                     rssi_event);
6063
6064         nla_nest_end(msg, pinfoattr);
6065
6066         if (genlmsg_end(msg, hdr) < 0) {
6067                 nlmsg_free(msg);
6068                 return;
6069         }
6070
6071         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6072                                 nl80211_mlme_mcgrp.id, gfp);
6073         return;
6074
6075  nla_put_failure:
6076         genlmsg_cancel(msg, hdr);
6077         nlmsg_free(msg);
6078 }
6079
6080 static int nl80211_netlink_notify(struct notifier_block * nb,
6081                                   unsigned long state,
6082                                   void *_notify)
6083 {
6084         struct netlink_notify *notify = _notify;
6085         struct cfg80211_registered_device *rdev;
6086         struct wireless_dev *wdev;
6087
6088         if (state != NETLINK_URELEASE)
6089                 return NOTIFY_DONE;
6090
6091         rcu_read_lock();
6092
6093         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6094                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6095                         cfg80211_mlme_unregister_actions(wdev, notify->pid);
6096
6097         rcu_read_unlock();
6098
6099         return NOTIFY_DONE;
6100 }
6101
6102 static struct notifier_block nl80211_netlink_notifier = {
6103         .notifier_call = nl80211_netlink_notify,
6104 };
6105
6106 /* initialisation/exit functions */
6107
6108 int nl80211_init(void)
6109 {
6110         int err;
6111
6112         err = genl_register_family_with_ops(&nl80211_fam,
6113                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6114         if (err)
6115                 return err;
6116
6117         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6118         if (err)
6119                 goto err_out;
6120
6121         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6122         if (err)
6123                 goto err_out;
6124
6125         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6126         if (err)
6127                 goto err_out;
6128
6129         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6130         if (err)
6131                 goto err_out;
6132
6133 #ifdef CONFIG_NL80211_TESTMODE
6134         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6135         if (err)
6136                 goto err_out;
6137 #endif
6138
6139         err = netlink_register_notifier(&nl80211_netlink_notifier);
6140         if (err)
6141                 goto err_out;
6142
6143         return 0;
6144  err_out:
6145         genl_unregister_family(&nl80211_fam);
6146         return err;
6147 }
6148
6149 void nl80211_exit(void)
6150 {
6151         netlink_unregister_notifier(&nl80211_netlink_notifier);
6152         genl_unregister_family(&nl80211_fam);
6153 }