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

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2009  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/list.h>
  11 #include <linux/if_ether.h>
  12 #include <linux/ieee80211.h>
  13 #include <linux/nl80211.h>
  14 #include <linux/rtnetlink.h>
  15 #include <linux/netlink.h>
  16 #include <linux/etherdevice.h>
  17 #include <net/genetlink.h>
  18 #include <net/cfg80211.h>
  19 #include "core.h"
  20 #include "nl80211.h"
  21 #include "reg.h"
  22
  23 /* the netlink family */
  24 static struct genl_family nl80211_fam = {
  25         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  26         .name = "nl80211",      /* have users key off the name instead */
  27         .hdrsize = 0,           /* no private header */
  28         .version = 1,           /* no particular meaning now */
  29         .maxattr = NL80211_ATTR_MAX,
  30 };
  31
  32 /* internal helper: get rdev and dev */
  33 static int get_rdev_dev_by_info_ifindex(struct nlattr **attrs,
  34                                        struct cfg80211_registered_device **rdev,
  35                                        struct net_device **dev)
  36 {
  37         int ifindex;
  38
  39         if (!attrs[NL80211_ATTR_IFINDEX])
  40                 return -EINVAL;
  41
  42         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  43         *dev = dev_get_by_index(&init_net, ifindex);
  44         if (!*dev)
  45                 return -ENODEV;
  46
  47         *rdev = cfg80211_get_dev_from_ifindex(ifindex);
  48         if (IS_ERR(*rdev)) {
  49                 dev_put(*dev);
  50                 return PTR_ERR(*rdev);
  51         }
  52
  53         return 0;
  54 }
  55
  56 /* policy for the attributes */
  57 static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = {
  58         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  59         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  60                                       .len = 20-1 },
  61         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  62         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  63         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  64         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  65         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  66         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  67         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  68
  69         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  70         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  71         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  72
  73         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  74         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  75
  76         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  77         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  78                                     .len = WLAN_MAX_KEY_LEN },
  79         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  80         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  81         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  82         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  83
  84         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  85         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  86         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  87                                        .len = IEEE80211_MAX_DATA_LEN },
  88         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  89                                        .len = IEEE80211_MAX_DATA_LEN },
  90         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  91         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  92         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  93         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  94                                                .len = NL80211_MAX_SUPP_RATES },
  95         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
  96         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
  97         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
  98         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
  99                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 100         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 101
 102         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 103         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 104
 105         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 106         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 107         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 108         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 109                                            .len = NL80211_MAX_SUPP_RATES },
 110
 111         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 112
 113         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 114                                          .len = NL80211_HT_CAPABILITY_LEN },
 115
 116         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 117         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 118                               .len = IEEE80211_MAX_DATA_LEN },
 119         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 120         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 121
 122         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 123                                 .len = IEEE80211_MAX_SSID_LEN },
 124         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 125         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 126         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 127         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 128         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 129         [NL80211_ATTR_STA_FLAGS2] = {
 130                 .len = sizeof(struct nl80211_sta_flag_update),
 131         },
 132         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 134         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 135         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 136 };
 137
 138 /* policy for the attributes */
 139 static struct nla_policy
 140 nl80211_key_policy[NL80211_KEY_MAX + 1] __read_mostly = {
 141         [NL80211_KEY_DATA] = { .type = NLA_BINARY,
 142                                     .len = WLAN_MAX_KEY_LEN },
 143         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 144         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 145         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 146         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 147         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 148 };
 149
 150 /* IE validation */
 151 static bool is_valid_ie_attr(const struct nlattr *attr)
 152 {
 153         const u8 *pos;
 154         int len;
 155
 156         if (!attr)
 157                 return true;
 158
 159         pos = nla_data(attr);
 160         len = nla_len(attr);
 161
 162         while (len) {
 163                 u8 elemlen;
 164
 165                 if (len < 2)
 166                         return false;
 167                 len -= 2;
 168
 169                 elemlen = pos[1];
 170                 if (elemlen > len)
 171                         return false;
 172
 173                 len -= elemlen;
 174                 pos += 2 + elemlen;
 175         }
 176
 177         return true;
 178 }
 179
 180 /* message building helper */
 181 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 182                                    int flags, u8 cmd)
 183 {
 184         /* since there is no private header just add the generic one */
 185         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 186 }
 187
 188 static int nl80211_msg_put_channel(struct sk_buff *msg,
 189                                    struct ieee80211_channel *chan)
 190 {
 191         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 192                     chan->center_freq);
 193
 194         if (chan->flags & IEEE80211_CHAN_DISABLED)
 195                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 196         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 197                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 198         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 199                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 200         if (chan->flags & IEEE80211_CHAN_RADAR)
 201                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 202
 203         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 204                     DBM_TO_MBM(chan->max_power));
 205
 206         return 0;
 207
 208  nla_put_failure:
 209         return -ENOBUFS;
 210 }
 211
 212 /* netlink command implementations */
 213
 214 struct key_parse {
 215         struct key_params p;
 216         int idx;
 217         bool def, defmgmt;
 218 };
 219
 220 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 221 {
 222         struct nlattr *tb[NL80211_KEY_MAX + 1];
 223         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 224                                    nl80211_key_policy);
 225         if (err)
 226                 return err;
 227
 228         k->def = !!tb[NL80211_KEY_DEFAULT];
 229         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 230
 231         if (tb[NL80211_KEY_IDX])
 232                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 233
 234         if (tb[NL80211_KEY_DATA]) {
 235                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 236                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 237         }
 238
 239         if (tb[NL80211_KEY_SEQ]) {
 240                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 241                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 242         }
 243
 244         if (tb[NL80211_KEY_CIPHER])
 245                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 246
 247         return 0;
 248 }
 249
 250 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 251 {
 252         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 253                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 254                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 255         }
 256
 257         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 258                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 259                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 260         }
 261
 262         if (info->attrs[NL80211_ATTR_KEY_IDX])
 263                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 264
 265         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 266                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 267
 268         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 269         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 270
 271         return 0;
 272 }
 273
 274 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 275 {
 276         int err;
 277
 278         memset(k, 0, sizeof(*k));
 279         k->idx = -1;
 280
 281         if (info->attrs[NL80211_ATTR_KEY])
 282                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 283         else
 284                 err = nl80211_parse_key_old(info, k);
 285
 286         if (err)
 287                 return err;
 288
 289         if (k->def && k->defmgmt)
 290                 return -EINVAL;
 291
 292         if (k->idx != -1) {
 293                 if (k->defmgmt) {
 294                         if (k->idx < 4 || k->idx > 5)
 295                                 return -EINVAL;
 296                 } else if (k->def) {
 297                         if (k->idx < 0 || k->idx > 3)
 298                                 return -EINVAL;
 299                 } else {
 300                         if (k->idx < 0 || k->idx > 5)
 301                                 return -EINVAL;
 302                 }
 303         }
 304
 305         return 0;
 306 }
 307
 308 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 309                               struct cfg80211_registered_device *dev)
 310 {
 311         void *hdr;
 312         struct nlattr *nl_bands, *nl_band;
 313         struct nlattr *nl_freqs, *nl_freq;
 314         struct nlattr *nl_rates, *nl_rate;
 315         struct nlattr *nl_modes;
 316         struct nlattr *nl_cmds;
 317         enum ieee80211_band band;
 318         struct ieee80211_channel *chan;
 319         struct ieee80211_rate *rate;
 320         int i;
 321         u16 ifmodes = dev->wiphy.interface_modes;
 322
 323         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 324         if (!hdr)
 325                 return -1;
 326
 327         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 328         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 329
 330         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 331                    dev->wiphy.retry_short);
 332         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 333                    dev->wiphy.retry_long);
 334         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 335                     dev->wiphy.frag_threshold);
 336         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 337                     dev->wiphy.rts_threshold);
 338
 339         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 340                    dev->wiphy.max_scan_ssids);
 341         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 342                     dev->wiphy.max_scan_ie_len);
 343
 344         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 345                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 346                 dev->wiphy.cipher_suites);
 347
 348         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 349         if (!nl_modes)
 350                 goto nla_put_failure;
 351
 352         i = 0;
 353         while (ifmodes) {
 354                 if (ifmodes & 1)
 355                         NLA_PUT_FLAG(msg, i);
 356                 ifmodes >>= 1;
 357                 i++;
 358         }
 359
 360         nla_nest_end(msg, nl_modes);
 361
 362         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 363         if (!nl_bands)
 364                 goto nla_put_failure;
 365
 366         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 367                 if (!dev->wiphy.bands[band])
 368                         continue;
 369
 370                 nl_band = nla_nest_start(msg, band);
 371                 if (!nl_band)
 372                         goto nla_put_failure;
 373
 374                 /* add HT info */
 375                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 376                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 377                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 378                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 379                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 380                                 dev->wiphy.bands[band]->ht_cap.cap);
 381                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 382                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 383                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 384                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 385                 }
 386
 387                 /* add frequencies */
 388                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 389                 if (!nl_freqs)
 390                         goto nla_put_failure;
 391
 392                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 393                         nl_freq = nla_nest_start(msg, i);
 394                         if (!nl_freq)
 395                                 goto nla_put_failure;
 396
 397                         chan = &dev->wiphy.bands[band]->channels[i];
 398
 399                         if (nl80211_msg_put_channel(msg, chan))
 400                                 goto nla_put_failure;
 401
 402                         nla_nest_end(msg, nl_freq);
 403                 }
 404
 405                 nla_nest_end(msg, nl_freqs);
 406
 407                 /* add bitrates */
 408                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 409                 if (!nl_rates)
 410                         goto nla_put_failure;
 411
 412                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 413                         nl_rate = nla_nest_start(msg, i);
 414                         if (!nl_rate)
 415                                 goto nla_put_failure;
 416
 417                         rate = &dev->wiphy.bands[band]->bitrates[i];
 418                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 419                                     rate->bitrate);
 420                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 421                                 NLA_PUT_FLAG(msg,
 422                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 423
 424                         nla_nest_end(msg, nl_rate);
 425                 }
 426
 427                 nla_nest_end(msg, nl_rates);
 428
 429                 nla_nest_end(msg, nl_band);
 430         }
 431         nla_nest_end(msg, nl_bands);
 432
 433         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 434         if (!nl_cmds)
 435                 goto nla_put_failure;
 436
 437         i = 0;
 438 #define CMD(op, n)                                              \
 439          do {                                                   \
 440                 if (dev->ops->op) {                             \
 441                         i++;                                    \
 442                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 443                 }                                               \
 444         } while (0)
 445
 446         CMD(add_virtual_intf, NEW_INTERFACE);
 447         CMD(change_virtual_intf, SET_INTERFACE);
 448         CMD(add_key, NEW_KEY);
 449         CMD(add_beacon, NEW_BEACON);
 450         CMD(add_station, NEW_STATION);
 451         CMD(add_mpath, NEW_MPATH);
 452         CMD(set_mesh_params, SET_MESH_PARAMS);
 453         CMD(change_bss, SET_BSS);
 454         CMD(auth, AUTHENTICATE);
 455         CMD(assoc, ASSOCIATE);
 456         CMD(deauth, DEAUTHENTICATE);
 457         CMD(disassoc, DISASSOCIATE);
 458         CMD(join_ibss, JOIN_IBSS);
 459
 460 #undef CMD
 461
 462         if (dev->ops->connect || dev->ops->auth) {
 463                 i++;
 464                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 465         }
 466
 467         if (dev->ops->disconnect || dev->ops->deauth) {
 468                 i++;
 469                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 470         }
 471
 472         nla_nest_end(msg, nl_cmds);
 473
 474         return genlmsg_end(msg, hdr);
 475
 476  nla_put_failure:
 477         genlmsg_cancel(msg, hdr);
 478         return -EMSGSIZE;
 479 }
 480
 481 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 482 {
 483         int idx = 0;
 484         int start = cb->args[0];
 485         struct cfg80211_registered_device *dev;
 486
 487         mutex_lock(&cfg80211_mutex);
 488         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 489                 if (++idx <= start)
 490                         continue;
 491                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 492                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 493                                        dev) < 0) {
 494                         idx--;
 495                         break;
 496                 }
 497         }
 498         mutex_unlock(&cfg80211_mutex);
 499
 500         cb->args[0] = idx;
 501
 502         return skb->len;
 503 }
 504
 505 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 506 {
 507         struct sk_buff *msg;
 508         struct cfg80211_registered_device *dev;
 509
 510         dev = cfg80211_get_dev_from_info(info);
 511         if (IS_ERR(dev))
 512                 return PTR_ERR(dev);
 513
 514         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 515         if (!msg)
 516                 goto out_err;
 517
 518         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 519                 goto out_free;
 520
 521         cfg80211_unlock_rdev(dev);
 522
 523         return genlmsg_reply(msg, info);
 524
 525  out_free:
 526         nlmsg_free(msg);
 527  out_err:
 528         cfg80211_unlock_rdev(dev);
 529         return -ENOBUFS;
 530 }
 531
 532 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 533         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 534         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 535         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 536         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 537         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 538 };
 539
 540 static int parse_txq_params(struct nlattr *tb[],
 541                             struct ieee80211_txq_params *txq_params)
 542 {
 543         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 544             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 545             !tb[NL80211_TXQ_ATTR_AIFS])
 546                 return -EINVAL;
 547
 548         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 549         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 550         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 551         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 552         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 553
 554         return 0;
 555 }
 556
 557 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 558 {
 559         struct cfg80211_registered_device *rdev;
 560         int result = 0, rem_txq_params = 0;
 561         struct nlattr *nl_txq_params;
 562         u32 changed;
 563         u8 retry_short = 0, retry_long = 0;
 564         u32 frag_threshold = 0, rts_threshold = 0;
 565
 566         rtnl_lock();
 567
 568         mutex_lock(&cfg80211_mutex);
 569
 570         rdev = __cfg80211_rdev_from_info(info);
 571         if (IS_ERR(rdev)) {
 572                 mutex_unlock(&cfg80211_mutex);
 573                 result = PTR_ERR(rdev);
 574                 goto unlock;
 575         }
 576
 577         mutex_lock(&rdev->mtx);
 578
 579         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 580                 result = cfg80211_dev_rename(
 581                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 582
 583         mutex_unlock(&cfg80211_mutex);
 584
 585         if (result)
 586                 goto bad_res;
 587
 588         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 589                 struct ieee80211_txq_params txq_params;
 590                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 591
 592                 if (!rdev->ops->set_txq_params) {
 593                         result = -EOPNOTSUPP;
 594                         goto bad_res;
 595                 }
 596
 597                 nla_for_each_nested(nl_txq_params,
 598                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 599                                     rem_txq_params) {
 600                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 601                                   nla_data(nl_txq_params),
 602                                   nla_len(nl_txq_params),
 603                                   txq_params_policy);
 604                         result = parse_txq_params(tb, &txq_params);
 605                         if (result)
 606                                 goto bad_res;
 607
 608                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 609                                                            &txq_params);
 610                         if (result)
 611                                 goto bad_res;
 612                 }
 613         }
 614
 615         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 616                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 617                 struct ieee80211_channel *chan;
 618                 struct ieee80211_sta_ht_cap *ht_cap;
 619                 u32 freq;
 620
 621                 if (!rdev->ops->set_channel) {
 622                         result = -EOPNOTSUPP;
 623                         goto bad_res;
 624                 }
 625
 626                 result = -EINVAL;
 627
 628                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 629                         channel_type = nla_get_u32(info->attrs[
 630                                            NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 631                         if (channel_type != NL80211_CHAN_NO_HT &&
 632                             channel_type != NL80211_CHAN_HT20 &&
 633                             channel_type != NL80211_CHAN_HT40PLUS &&
 634                             channel_type != NL80211_CHAN_HT40MINUS)
 635                                 goto bad_res;
 636                 }
 637
 638                 freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 639                 chan = ieee80211_get_channel(&rdev->wiphy, freq);
 640
 641                 /* Primary channel not allowed */
 642                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
 643                         goto bad_res;
 644
 645                 if (channel_type == NL80211_CHAN_HT40MINUS &&
 646                     (chan->flags & IEEE80211_CHAN_NO_HT40MINUS))
 647                         goto bad_res;
 648                 else if (channel_type == NL80211_CHAN_HT40PLUS &&
 649                          (chan->flags & IEEE80211_CHAN_NO_HT40PLUS))
 650                         goto bad_res;
 651
 652                 /*
 653                  * At this point we know if that if HT40 was requested
 654                  * we are allowed to use it and the extension channel
 655                  * exists.
 656                  */
 657
 658                 ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
 659
 660                 /* no HT capabilities or intolerant */
 661                 if (channel_type != NL80211_CHAN_NO_HT) {
 662                         if (!ht_cap->ht_supported)
 663                                 goto bad_res;
 664                         if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
 665                             (ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT))
 666                                 goto bad_res;
 667                 }
 668
 669                 result = rdev->ops->set_channel(&rdev->wiphy, chan,
 670                                                 channel_type);
 671                 if (result)
 672                         goto bad_res;
 673         }
 674
 675         changed = 0;
 676
 677         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 678                 retry_short = nla_get_u8(
 679                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 680                 if (retry_short == 0) {
 681                         result = -EINVAL;
 682                         goto bad_res;
 683                 }
 684                 changed |= WIPHY_PARAM_RETRY_SHORT;
 685         }
 686
 687         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 688                 retry_long = nla_get_u8(
 689                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 690                 if (retry_long == 0) {
 691                         result = -EINVAL;
 692                         goto bad_res;
 693                 }
 694                 changed |= WIPHY_PARAM_RETRY_LONG;
 695         }
 696
 697         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 698                 frag_threshold = nla_get_u32(
 699                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 700                 if (frag_threshold < 256) {
 701                         result = -EINVAL;
 702                         goto bad_res;
 703                 }
 704                 if (frag_threshold != (u32) -1) {
 705                         /*
 706                          * Fragments (apart from the last one) are required to
 707                          * have even length. Make the fragmentation code
 708                          * simpler by stripping LSB should someone try to use
 709                          * odd threshold value.
 710                          */
 711                         frag_threshold &= ~0x1;
 712                 }
 713                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
 714         }
 715
 716         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
 717                 rts_threshold = nla_get_u32(
 718                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
 719                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
 720         }
 721
 722         if (changed) {
 723                 u8 old_retry_short, old_retry_long;
 724                 u32 old_frag_threshold, old_rts_threshold;
 725
 726                 if (!rdev->ops->set_wiphy_params) {
 727                         result = -EOPNOTSUPP;
 728                         goto bad_res;
 729                 }
 730
 731                 old_retry_short = rdev->wiphy.retry_short;
 732                 old_retry_long = rdev->wiphy.retry_long;
 733                 old_frag_threshold = rdev->wiphy.frag_threshold;
 734                 old_rts_threshold = rdev->wiphy.rts_threshold;
 735
 736                 if (changed & WIPHY_PARAM_RETRY_SHORT)
 737                         rdev->wiphy.retry_short = retry_short;
 738                 if (changed & WIPHY_PARAM_RETRY_LONG)
 739                         rdev->wiphy.retry_long = retry_long;
 740                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
 741                         rdev->wiphy.frag_threshold = frag_threshold;
 742                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
 743                         rdev->wiphy.rts_threshold = rts_threshold;
 744
 745                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
 746                 if (result) {
 747                         rdev->wiphy.retry_short = old_retry_short;
 748                         rdev->wiphy.retry_long = old_retry_long;
 749                         rdev->wiphy.frag_threshold = old_frag_threshold;
 750                         rdev->wiphy.rts_threshold = old_rts_threshold;
 751                 }
 752         }
 753
 754  bad_res:
 755         mutex_unlock(&rdev->mtx);
 756  unlock:
 757         rtnl_unlock();
 758         return result;
 759 }
 760
 761
 762 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 763                               struct cfg80211_registered_device *rdev,
 764                               struct net_device *dev)
 765 {
 766         void *hdr;
 767
 768         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
 769         if (!hdr)
 770                 return -1;
 771
 772         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
 773         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
 774         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
 775         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
 776         return genlmsg_end(msg, hdr);
 777
 778  nla_put_failure:
 779         genlmsg_cancel(msg, hdr);
 780         return -EMSGSIZE;
 781 }
 782
 783 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
 784 {
 785         int wp_idx = 0;
 786         int if_idx = 0;
 787         int wp_start = cb->args[0];
 788         int if_start = cb->args[1];
 789         struct cfg80211_registered_device *dev;
 790         struct wireless_dev *wdev;
 791
 792         mutex_lock(&cfg80211_mutex);
 793         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 794                 if (wp_idx < wp_start) {
 795                         wp_idx++;
 796                         continue;
 797                 }
 798                 if_idx = 0;
 799
 800                 mutex_lock(&dev->devlist_mtx);
 801                 list_for_each_entry(wdev, &dev->netdev_list, list) {
 802                         if (if_idx < if_start) {
 803                                 if_idx++;
 804                                 continue;
 805                         }
 806                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
 807                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
 808                                                dev, wdev->netdev) < 0) {
 809                                 mutex_unlock(&dev->devlist_mtx);
 810                                 goto out;
 811                         }
 812                         if_idx++;
 813                 }
 814                 mutex_unlock(&dev->devlist_mtx);
 815
 816                 wp_idx++;
 817         }
 818  out:
 819         mutex_unlock(&cfg80211_mutex);
 820
 821         cb->args[0] = wp_idx;
 822         cb->args[1] = if_idx;
 823
 824         return skb->len;
 825 }
 826
 827 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
 828 {
 829         struct sk_buff *msg;
 830         struct cfg80211_registered_device *dev;
 831         struct net_device *netdev;
 832         int err;
 833
 834         err = get_rdev_dev_by_info_ifindex(info->attrs, &dev, &netdev);
 835         if (err)
 836                 return err;
 837
 838         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 839         if (!msg)
 840                 goto out_err;
 841
 842         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
 843                                dev, netdev) < 0)
 844                 goto out_free;
 845
 846         dev_put(netdev);
 847         cfg80211_unlock_rdev(dev);
 848
 849         return genlmsg_reply(msg, info);
 850
 851  out_free:
 852         nlmsg_free(msg);
 853  out_err:
 854         dev_put(netdev);
 855         cfg80211_unlock_rdev(dev);
 856         return -ENOBUFS;
 857 }
 858
 859 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
 860         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
 861         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
 862         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
 863         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
 864         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
 865 };
 866
 867 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
 868 {
 869         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
 870         int flag;
 871
 872         *mntrflags = 0;
 873
 874         if (!nla)
 875                 return -EINVAL;
 876
 877         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
 878                              nla, mntr_flags_policy))
 879                 return -EINVAL;
 880
 881         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
 882                 if (flags[flag])
 883                         *mntrflags |= (1<<flag);
 884
 885         return 0;
 886 }
 887
 888 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
 889 {
 890         struct cfg80211_registered_device *rdev;
 891         struct vif_params params;
 892         int err;
 893         enum nl80211_iftype otype, ntype;
 894         struct net_device *dev;
 895         u32 _flags, *flags = NULL;
 896         bool change = false;
 897
 898         memset(&params, 0, sizeof(params));
 899
 900         rtnl_lock();
 901
 902         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
 903         if (err)
 904                 goto unlock_rtnl;
 905
 906         otype = ntype = dev->ieee80211_ptr->iftype;
 907
 908         if (info->attrs[NL80211_ATTR_IFTYPE]) {
 909                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
 910                 if (otype != ntype)
 911                         change = true;
 912                 if (ntype > NL80211_IFTYPE_MAX) {
 913                         err = -EINVAL;
 914                         goto unlock;
 915                 }
 916         }
 917
 918         if (!rdev->ops->change_virtual_intf ||
 919             !(rdev->wiphy.interface_modes & (1 << ntype))) {
 920                 err = -EOPNOTSUPP;
 921                 goto unlock;
 922         }
 923
 924         if (info->attrs[NL80211_ATTR_MESH_ID]) {
 925                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
 926                         err = -EINVAL;
 927                         goto unlock;
 928                 }
 929                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
 930                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
 931                 change = true;
 932         }
 933
 934         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
 935                 if (ntype != NL80211_IFTYPE_MONITOR) {
 936                         err = -EINVAL;
 937                         goto unlock;
 938                 }
 939                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
 940                                           &_flags);
 941                 if (err)
 942                         goto unlock;
 943
 944                 flags = &_flags;
 945                 change = true;
 946         }
 947
 948         if (change)
 949                 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev,
 950                                                     ntype, flags, &params);
 951         else
 952                 err = 0;
 953
 954         WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype);
 955
 956         if (!err && (ntype != otype)) {
 957                 if (otype == NL80211_IFTYPE_ADHOC)
 958                         cfg80211_clear_ibss(dev, false);
 959         }
 960
 961  unlock:
 962         dev_put(dev);
 963         cfg80211_unlock_rdev(rdev);
 964  unlock_rtnl:
 965         rtnl_unlock();
 966         return err;
 967 }
 968
 969 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
 970 {
 971         struct cfg80211_registered_device *rdev;
 972         struct vif_params params;
 973         int err;
 974         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
 975         u32 flags;
 976
 977         memset(&params, 0, sizeof(params));
 978
 979         if (!info->attrs[NL80211_ATTR_IFNAME])
 980                 return -EINVAL;
 981
 982         if (info->attrs[NL80211_ATTR_IFTYPE]) {
 983                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
 984                 if (type > NL80211_IFTYPE_MAX)
 985                         return -EINVAL;
 986         }
 987
 988         rtnl_lock();
 989
 990         rdev = cfg80211_get_dev_from_info(info);
 991         if (IS_ERR(rdev)) {
 992                 err = PTR_ERR(rdev);
 993                 goto unlock_rtnl;
 994         }
 995
 996         if (!rdev->ops->add_virtual_intf ||
 997             !(rdev->wiphy.interface_modes & (1 << type))) {
 998                 err = -EOPNOTSUPP;
 999                 goto unlock;
1000         }
1001
1002         if (type == NL80211_IFTYPE_MESH_POINT &&
1003             info->attrs[NL80211_ATTR_MESH_ID]) {
1004                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1005                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1006         }
1007
1008         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1009                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1010                                   &flags);
1011         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1012                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1013                 type, err ? NULL : &flags, &params);
1014
1015  unlock:
1016         cfg80211_unlock_rdev(rdev);
1017  unlock_rtnl:
1018         rtnl_unlock();
1019         return err;
1020 }
1021
1022 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1023 {
1024         struct cfg80211_registered_device *rdev;
1025         int ifindex, err;
1026         struct net_device *dev;
1027
1028         rtnl_lock();
1029
1030         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1031         if (err)
1032                 goto unlock_rtnl;
1033         ifindex = dev->ifindex;
1034         dev_put(dev);
1035
1036         if (!rdev->ops->del_virtual_intf) {
1037                 err = -EOPNOTSUPP;
1038                 goto out;
1039         }
1040
1041         err = rdev->ops->del_virtual_intf(&rdev->wiphy, ifindex);
1042
1043  out:
1044         cfg80211_unlock_rdev(rdev);
1045  unlock_rtnl:
1046         rtnl_unlock();
1047         return err;
1048 }
1049
1050 struct get_key_cookie {
1051         struct sk_buff *msg;
1052         int error;
1053         int idx;
1054 };
1055
1056 static void get_key_callback(void *c, struct key_params *params)
1057 {
1058         struct nlattr *key;
1059         struct get_key_cookie *cookie = c;
1060
1061         if (params->key)
1062                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1063                         params->key_len, params->key);
1064
1065         if (params->seq)
1066                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1067                         params->seq_len, params->seq);
1068
1069         if (params->cipher)
1070                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1071                             params->cipher);
1072
1073         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1074         if (!key)
1075                 goto nla_put_failure;
1076
1077         if (params->key)
1078                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1079                         params->key_len, params->key);
1080
1081         if (params->seq)
1082                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1083                         params->seq_len, params->seq);
1084
1085         if (params->cipher)
1086                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1087                             params->cipher);
1088
1089         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1090
1091         nla_nest_end(cookie->msg, key);
1092
1093         return;
1094  nla_put_failure:
1095         cookie->error = 1;
1096 }
1097
1098 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1099 {
1100         struct cfg80211_registered_device *rdev;
1101         int err;
1102         struct net_device *dev;
1103         u8 key_idx = 0;
1104         u8 *mac_addr = NULL;
1105         struct get_key_cookie cookie = {
1106                 .error = 0,
1107         };
1108         void *hdr;
1109         struct sk_buff *msg;
1110
1111         if (info->attrs[NL80211_ATTR_KEY_IDX])
1112                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1113
1114         if (key_idx > 5)
1115                 return -EINVAL;
1116
1117         if (info->attrs[NL80211_ATTR_MAC])
1118                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1119
1120         rtnl_lock();
1121
1122         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1123         if (err)
1124                 goto unlock_rtnl;
1125
1126         if (!rdev->ops->get_key) {
1127                 err = -EOPNOTSUPP;
1128                 goto out;
1129         }
1130
1131         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1132         if (!msg) {
1133                 err = -ENOMEM;
1134                 goto out;
1135         }
1136
1137         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1138                              NL80211_CMD_NEW_KEY);
1139
1140         if (IS_ERR(hdr)) {
1141                 err = PTR_ERR(hdr);
1142                 goto free_msg;
1143         }
1144
1145         cookie.msg = msg;
1146         cookie.idx = key_idx;
1147
1148         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1149         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1150         if (mac_addr)
1151                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1152
1153         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1154                                 &cookie, get_key_callback);
1155
1156         if (err)
1157                 goto free_msg;
1158
1159         if (cookie.error)
1160                 goto nla_put_failure;
1161
1162         genlmsg_end(msg, hdr);
1163         err = genlmsg_reply(msg, info);
1164         goto out;
1165
1166  nla_put_failure:
1167         err = -ENOBUFS;
1168  free_msg:
1169         nlmsg_free(msg);
1170  out:
1171         cfg80211_unlock_rdev(rdev);
1172         dev_put(dev);
1173  unlock_rtnl:
1174         rtnl_unlock();
1175
1176         return err;
1177 }
1178
1179 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1180 {
1181         struct cfg80211_registered_device *rdev;
1182         struct key_parse key;
1183         int err;
1184         struct net_device *dev;
1185         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1186                     u8 key_index);
1187
1188         err = nl80211_parse_key(info, &key);
1189         if (err)
1190                 return err;
1191
1192         if (key.idx < 0)
1193                 return -EINVAL;
1194
1195         /* only support setting default key */
1196         if (!key.def && !key.defmgmt)
1197                 return -EINVAL;
1198
1199         rtnl_lock();
1200
1201         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1202         if (err)
1203                 goto unlock_rtnl;
1204
1205         if (key.def)
1206                 func = rdev->ops->set_default_key;
1207         else
1208                 func = rdev->ops->set_default_mgmt_key;
1209
1210         if (!func) {
1211                 err = -EOPNOTSUPP;
1212                 goto out;
1213         }
1214
1215         err = func(&rdev->wiphy, dev, key.idx);
1216 #ifdef CONFIG_WIRELESS_EXT
1217         if (!err) {
1218                 if (func == rdev->ops->set_default_key)
1219                         dev->ieee80211_ptr->wext.default_key = key.idx;
1220                 else
1221                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1222         }
1223 #endif
1224
1225  out:
1226         cfg80211_unlock_rdev(rdev);
1227         dev_put(dev);
1228
1229  unlock_rtnl:
1230         rtnl_unlock();
1231
1232         return err;
1233 }
1234
1235 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1236 {
1237         struct cfg80211_registered_device *rdev;
1238         int err, i;
1239         struct net_device *dev;
1240         struct key_parse key;
1241         u8 *mac_addr = NULL;
1242
1243         err = nl80211_parse_key(info, &key);
1244         if (err)
1245                 return err;
1246
1247         if (!key.p.key)
1248                 return -EINVAL;
1249
1250         if (info->attrs[NL80211_ATTR_MAC])
1251                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1252
1253         if (cfg80211_validate_key_settings(&key.p, key.idx, mac_addr))
1254                 return -EINVAL;
1255
1256         rtnl_lock();
1257
1258         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1259         if (err)
1260                 goto unlock_rtnl;
1261
1262         for (i = 0; i < rdev->wiphy.n_cipher_suites; i++)
1263                 if (key.p.cipher == rdev->wiphy.cipher_suites[i])
1264                         break;
1265         if (i == rdev->wiphy.n_cipher_suites) {
1266                 err = -EINVAL;
1267                 goto out;
1268         }
1269
1270         if (!rdev->ops->add_key) {
1271                 err = -EOPNOTSUPP;
1272                 goto out;
1273         }
1274
1275         err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx, mac_addr, &key.p);
1276
1277  out:
1278         cfg80211_unlock_rdev(rdev);
1279         dev_put(dev);
1280  unlock_rtnl:
1281         rtnl_unlock();
1282
1283         return err;
1284 }
1285
1286 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1287 {
1288         struct cfg80211_registered_device *rdev;
1289         int err;
1290         struct net_device *dev;
1291         u8 *mac_addr = NULL;
1292         struct key_parse key;
1293
1294         err = nl80211_parse_key(info, &key);
1295         if (err)
1296                 return err;
1297
1298         if (info->attrs[NL80211_ATTR_MAC])
1299                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1300
1301         rtnl_lock();
1302
1303         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1304         if (err)
1305                 goto unlock_rtnl;
1306
1307         if (!rdev->ops->del_key) {
1308                 err = -EOPNOTSUPP;
1309                 goto out;
1310         }
1311
1312         err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1313
1314 #ifdef CONFIG_WIRELESS_EXT
1315         if (!err) {
1316                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1317                         dev->ieee80211_ptr->wext.default_key = -1;
1318                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1319                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1320         }
1321 #endif
1322
1323  out:
1324         cfg80211_unlock_rdev(rdev);
1325         dev_put(dev);
1326
1327  unlock_rtnl:
1328         rtnl_unlock();
1329
1330         return err;
1331 }
1332
1333 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1334 {
1335         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1336                     struct beacon_parameters *info);
1337         struct cfg80211_registered_device *rdev;
1338         int err;
1339         struct net_device *dev;
1340         struct beacon_parameters params;
1341         int haveinfo = 0;
1342
1343         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1344                 return -EINVAL;
1345
1346         rtnl_lock();
1347
1348         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1349         if (err)
1350                 goto unlock_rtnl;
1351
1352         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1353                 err = -EOPNOTSUPP;
1354                 goto out;
1355         }
1356
1357         switch (info->genlhdr->cmd) {
1358         case NL80211_CMD_NEW_BEACON:
1359                 /* these are required for NEW_BEACON */
1360                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1361                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1362                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1363                         err = -EINVAL;
1364                         goto out;
1365                 }
1366
1367                 call = rdev->ops->add_beacon;
1368                 break;
1369         case NL80211_CMD_SET_BEACON:
1370                 call = rdev->ops->set_beacon;
1371                 break;
1372         default:
1373                 WARN_ON(1);
1374                 err = -EOPNOTSUPP;
1375                 goto out;
1376         }
1377
1378         if (!call) {
1379                 err = -EOPNOTSUPP;
1380                 goto out;
1381         }
1382
1383         memset(&params, 0, sizeof(params));
1384
1385         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1386                 params.interval =
1387                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1388                 haveinfo = 1;
1389         }
1390
1391         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1392                 params.dtim_period =
1393                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1394                 haveinfo = 1;
1395         }
1396
1397         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1398                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1399                 params.head_len =
1400                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1401                 haveinfo = 1;
1402         }
1403
1404         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1405                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1406                 params.tail_len =
1407                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1408                 haveinfo = 1;
1409         }
1410
1411         if (!haveinfo) {
1412                 err = -EINVAL;
1413                 goto out;
1414         }
1415
1416         err = call(&rdev->wiphy, dev, &params);
1417
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_del_beacon(struct sk_buff *skb, struct genl_info *info)
1428 {
1429         struct cfg80211_registered_device *rdev;
1430         int err;
1431         struct net_device *dev;
1432
1433         rtnl_lock();
1434
1435         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1436         if (err)
1437                 goto unlock_rtnl;
1438
1439         if (!rdev->ops->del_beacon) {
1440                 err = -EOPNOTSUPP;
1441                 goto out;
1442         }
1443
1444         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
1445                 err = -EOPNOTSUPP;
1446                 goto out;
1447         }
1448         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1449
1450  out:
1451         cfg80211_unlock_rdev(rdev);
1452         dev_put(dev);
1453  unlock_rtnl:
1454         rtnl_unlock();
1455
1456         return err;
1457 }
1458
1459 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1460         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1461         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1462         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1463         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1464 };
1465
1466 static int parse_station_flags(struct genl_info *info,
1467                                struct station_parameters *params)
1468 {
1469         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1470         struct nlattr *nla;
1471         int flag;
1472
1473         /*
1474          * Try parsing the new attribute first so userspace
1475          * can specify both for older kernels.
1476          */
1477         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1478         if (nla) {
1479                 struct nl80211_sta_flag_update *sta_flags;
1480
1481                 sta_flags = nla_data(nla);
1482                 params->sta_flags_mask = sta_flags->mask;
1483                 params->sta_flags_set = sta_flags->set;
1484                 if ((params->sta_flags_mask |
1485                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1486                         return -EINVAL;
1487                 return 0;
1488         }
1489
1490         /* if present, parse the old attribute */
1491
1492         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1493         if (!nla)
1494                 return 0;
1495
1496         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1497                              nla, sta_flags_policy))
1498                 return -EINVAL;
1499
1500         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1501         params->sta_flags_mask &= ~1;
1502
1503         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1504                 if (flags[flag])
1505                         params->sta_flags_set |= (1<<flag);
1506
1507         return 0;
1508 }
1509
1510 static u16 nl80211_calculate_bitrate(struct rate_info *rate)
1511 {
1512         int modulation, streams, bitrate;
1513
1514         if (!(rate->flags & RATE_INFO_FLAGS_MCS))
1515                 return rate->legacy;
1516
1517         /* the formula below does only work for MCS values smaller than 32 */
1518         if (rate->mcs >= 32)
1519                 return 0;
1520
1521         modulation = rate->mcs & 7;
1522         streams = (rate->mcs >> 3) + 1;
1523
1524         bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ?
1525                         13500000 : 6500000;
1526
1527         if (modulation < 4)
1528                 bitrate *= (modulation + 1);
1529         else if (modulation == 4)
1530                 bitrate *= (modulation + 2);
1531         else
1532                 bitrate *= (modulation + 3);
1533
1534         bitrate *= streams;
1535
1536         if (rate->flags & RATE_INFO_FLAGS_SHORT_GI)
1537                 bitrate = (bitrate / 9) * 10;
1538
1539         /* do NOT round down here */
1540         return (bitrate + 50000) / 100000;
1541 }
1542
1543 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1544                                 int flags, struct net_device *dev,
1545                                 u8 *mac_addr, struct station_info *sinfo)
1546 {
1547         void *hdr;
1548         struct nlattr *sinfoattr, *txrate;
1549         u16 bitrate;
1550
1551         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1552         if (!hdr)
1553                 return -1;
1554
1555         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1556         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1557
1558         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1559         if (!sinfoattr)
1560                 goto nla_put_failure;
1561         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1562                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1563                             sinfo->inactive_time);
1564         if (sinfo->filled & STATION_INFO_RX_BYTES)
1565                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1566                             sinfo->rx_bytes);
1567         if (sinfo->filled & STATION_INFO_TX_BYTES)
1568                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1569                             sinfo->tx_bytes);
1570         if (sinfo->filled & STATION_INFO_LLID)
1571                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1572                             sinfo->llid);
1573         if (sinfo->filled & STATION_INFO_PLID)
1574                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1575                             sinfo->plid);
1576         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1577                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1578                             sinfo->plink_state);
1579         if (sinfo->filled & STATION_INFO_SIGNAL)
1580                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1581                            sinfo->signal);
1582         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1583                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1584                 if (!txrate)
1585                         goto nla_put_failure;
1586
1587                 /* nl80211_calculate_bitrate will return 0 for mcs >= 32 */
1588                 bitrate = nl80211_calculate_bitrate(&sinfo->txrate);
1589                 if (bitrate > 0)
1590                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1591
1592                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1593                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1594                                     sinfo->txrate.mcs);
1595                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1596                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1597                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1598                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1599
1600                 nla_nest_end(msg, txrate);
1601         }
1602         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1603                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1604                             sinfo->rx_packets);
1605         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1606                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1607                             sinfo->tx_packets);
1608         nla_nest_end(msg, sinfoattr);
1609
1610         return genlmsg_end(msg, hdr);
1611
1612  nla_put_failure:
1613         genlmsg_cancel(msg, hdr);
1614         return -EMSGSIZE;
1615 }
1616
1617 static int nl80211_dump_station(struct sk_buff *skb,
1618                                 struct netlink_callback *cb)
1619 {
1620         struct station_info sinfo;
1621         struct cfg80211_registered_device *dev;
1622         struct net_device *netdev;
1623         u8 mac_addr[ETH_ALEN];
1624         int ifidx = cb->args[0];
1625         int sta_idx = cb->args[1];
1626         int err;
1627
1628         if (!ifidx) {
1629                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
1630                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
1631                                   nl80211_policy);
1632                 if (err)
1633                         return err;
1634
1635                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
1636                         return -EINVAL;
1637
1638                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
1639                 if (!ifidx)
1640                         return -EINVAL;
1641         }
1642
1643         rtnl_lock();
1644
1645         netdev = __dev_get_by_index(&init_net, ifidx);
1646         if (!netdev) {
1647                 err = -ENODEV;
1648                 goto out_rtnl;
1649         }
1650
1651         dev = cfg80211_get_dev_from_ifindex(ifidx);
1652         if (IS_ERR(dev)) {
1653                 err = PTR_ERR(dev);
1654                 goto out_rtnl;
1655         }
1656
1657         if (!dev->ops->dump_station) {
1658                 err = -EOPNOTSUPP;
1659                 goto out_err;
1660         }
1661
1662         while (1) {
1663                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1664                                              mac_addr, &sinfo);
1665                 if (err == -ENOENT)
1666                         break;
1667                 if (err)
1668                         goto out_err;
1669
1670                 if (nl80211_send_station(skb,
1671                                 NETLINK_CB(cb->skb).pid,
1672                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1673                                 netdev, mac_addr,
1674                                 &sinfo) < 0)
1675                         goto out;
1676
1677                 sta_idx++;
1678         }
1679
1680
1681  out:
1682         cb->args[1] = sta_idx;
1683         err = skb->len;
1684  out_err:
1685         cfg80211_unlock_rdev(dev);
1686  out_rtnl:
1687         rtnl_unlock();
1688
1689         return err;
1690 }
1691
1692 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
1693 {
1694         struct cfg80211_registered_device *rdev;
1695         int err;
1696         struct net_device *dev;
1697         struct station_info sinfo;
1698         struct sk_buff *msg;
1699         u8 *mac_addr = NULL;
1700
1701         memset(&sinfo, 0, sizeof(sinfo));
1702
1703         if (!info->attrs[NL80211_ATTR_MAC])
1704                 return -EINVAL;
1705
1706         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1707
1708         rtnl_lock();
1709
1710         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1711         if (err)
1712                 goto out_rtnl;
1713
1714         if (!rdev->ops->get_station) {
1715                 err = -EOPNOTSUPP;
1716                 goto out;
1717         }
1718
1719         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
1720         if (err)
1721                 goto out;
1722
1723         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1724         if (!msg)
1725                 goto out;
1726
1727         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
1728                                  dev, mac_addr, &sinfo) < 0)
1729                 goto out_free;
1730
1731         err = genlmsg_reply(msg, info);
1732         goto out;
1733
1734  out_free:
1735         nlmsg_free(msg);
1736  out:
1737         cfg80211_unlock_rdev(rdev);
1738         dev_put(dev);
1739  out_rtnl:
1740         rtnl_unlock();
1741
1742         return err;
1743 }
1744
1745 /*
1746  * Get vlan interface making sure it is on the right wiphy.
1747  */
1748 static int get_vlan(struct nlattr *vlanattr,
1749                     struct cfg80211_registered_device *rdev,
1750                     struct net_device **vlan)
1751 {
1752         *vlan = NULL;
1753
1754         if (vlanattr) {
1755                 *vlan = dev_get_by_index(&init_net, nla_get_u32(vlanattr));
1756                 if (!*vlan)
1757                         return -ENODEV;
1758                 if (!(*vlan)->ieee80211_ptr)
1759                         return -EINVAL;
1760                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
1761                         return -EINVAL;
1762         }
1763         return 0;
1764 }
1765
1766 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
1767 {
1768         struct cfg80211_registered_device *rdev;
1769         int err;
1770         struct net_device *dev;
1771         struct station_parameters params;
1772         u8 *mac_addr = NULL;
1773
1774         memset(&params, 0, sizeof(params));
1775
1776         params.listen_interval = -1;
1777
1778         if (info->attrs[NL80211_ATTR_STA_AID])
1779                 return -EINVAL;
1780
1781         if (!info->attrs[NL80211_ATTR_MAC])
1782                 return -EINVAL;
1783
1784         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1785
1786         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
1787                 params.supported_rates =
1788                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1789                 params.supported_rates_len =
1790                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1791         }
1792
1793         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1794                 params.listen_interval =
1795                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1796
1797         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1798                 params.ht_capa =
1799                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1800
1801         if (parse_station_flags(info, &params))
1802                 return -EINVAL;
1803
1804         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
1805                 params.plink_action =
1806                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
1807
1808         rtnl_lock();
1809
1810         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1811         if (err)
1812                 goto out_rtnl;
1813
1814         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], rdev, &params.vlan);
1815         if (err)
1816                 goto out;
1817
1818         /* validate settings */
1819         err = 0;
1820
1821         switch (dev->ieee80211_ptr->iftype) {
1822         case NL80211_IFTYPE_AP:
1823         case NL80211_IFTYPE_AP_VLAN:
1824                 /* disallow mesh-specific things */
1825                 if (params.plink_action)
1826                         err = -EINVAL;
1827                 break;
1828         case NL80211_IFTYPE_STATION:
1829                 /* disallow everything but AUTHORIZED flag */
1830                 if (params.plink_action)
1831                         err = -EINVAL;
1832                 if (params.vlan)
1833                         err = -EINVAL;
1834                 if (params.supported_rates)
1835                         err = -EINVAL;
1836                 if (params.ht_capa)
1837                         err = -EINVAL;
1838                 if (params.listen_interval >= 0)
1839                         err = -EINVAL;
1840                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
1841                         err = -EINVAL;
1842                 break;
1843         case NL80211_IFTYPE_MESH_POINT:
1844                 /* disallow things mesh doesn't support */
1845                 if (params.vlan)
1846                         err = -EINVAL;
1847                 if (params.ht_capa)
1848                         err = -EINVAL;
1849                 if (params.listen_interval >= 0)
1850                         err = -EINVAL;
1851                 if (params.supported_rates)
1852                         err = -EINVAL;
1853                 if (params.sta_flags_mask)
1854                         err = -EINVAL;
1855                 break;
1856         default:
1857                 err = -EINVAL;
1858         }
1859
1860         if (err)
1861                 goto out;
1862
1863         if (!rdev->ops->change_station) {
1864                 err = -EOPNOTSUPP;
1865                 goto out;
1866         }
1867
1868         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
1869
1870  out:
1871         if (params.vlan)
1872                 dev_put(params.vlan);
1873         cfg80211_unlock_rdev(rdev);
1874         dev_put(dev);
1875  out_rtnl:
1876         rtnl_unlock();
1877
1878         return err;
1879 }
1880
1881 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
1882 {
1883         struct cfg80211_registered_device *rdev;
1884         int err;
1885         struct net_device *dev;
1886         struct station_parameters params;
1887         u8 *mac_addr = NULL;
1888
1889         memset(&params, 0, sizeof(params));
1890
1891         if (!info->attrs[NL80211_ATTR_MAC])
1892                 return -EINVAL;
1893
1894         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
1895                 return -EINVAL;
1896
1897         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
1898                 return -EINVAL;
1899
1900         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1901         params.supported_rates =
1902                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1903         params.supported_rates_len =
1904                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
1905         params.listen_interval =
1906                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
1907
1908         if (info->attrs[NL80211_ATTR_STA_AID]) {
1909                 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
1910                 if (!params.aid || params.aid > IEEE80211_MAX_AID)
1911                         return -EINVAL;
1912         }
1913
1914         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
1915                 params.ht_capa =
1916                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
1917
1918         if (parse_station_flags(info, &params))
1919                 return -EINVAL;
1920
1921         rtnl_lock();
1922
1923         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1924         if (err)
1925                 goto out_rtnl;
1926
1927         err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], rdev, &params.vlan);
1928         if (err)
1929                 goto out;
1930
1931         /* validate settings */
1932         err = 0;
1933
1934         switch (dev->ieee80211_ptr->iftype) {
1935         case NL80211_IFTYPE_AP:
1936         case NL80211_IFTYPE_AP_VLAN:
1937                 /* all ok but must have AID */
1938                 if (!params.aid)
1939                         err = -EINVAL;
1940                 break;
1941         case NL80211_IFTYPE_MESH_POINT:
1942                 /* disallow things mesh doesn't support */
1943                 if (params.vlan)
1944                         err = -EINVAL;
1945                 if (params.aid)
1946                         err = -EINVAL;
1947                 if (params.ht_capa)
1948                         err = -EINVAL;
1949                 if (params.listen_interval >= 0)
1950                         err = -EINVAL;
1951                 if (params.supported_rates)
1952                         err = -EINVAL;
1953                 if (params.sta_flags_mask)
1954                         err = -EINVAL;
1955                 break;
1956         default:
1957                 err = -EINVAL;
1958         }
1959
1960         if (err)
1961                 goto out;
1962
1963         if (!rdev->ops->add_station) {
1964                 err = -EOPNOTSUPP;
1965                 goto out;
1966         }
1967
1968         if (!netif_running(dev)) {
1969                 err = -ENETDOWN;
1970                 goto out;
1971         }
1972
1973         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
1974
1975  out:
1976         if (params.vlan)
1977                 dev_put(params.vlan);
1978         cfg80211_unlock_rdev(rdev);
1979         dev_put(dev);
1980  out_rtnl:
1981         rtnl_unlock();
1982
1983         return err;
1984 }
1985
1986 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
1987 {
1988         struct cfg80211_registered_device *rdev;
1989         int err;
1990         struct net_device *dev;
1991         u8 *mac_addr = NULL;
1992
1993         if (info->attrs[NL80211_ATTR_MAC])
1994                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1995
1996         rtnl_lock();
1997
1998         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
1999         if (err)
2000                 goto out_rtnl;
2001
2002         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2003             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2004             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2005                 err = -EINVAL;
2006                 goto out;
2007         }
2008
2009         if (!rdev->ops->del_station) {
2010                 err = -EOPNOTSUPP;
2011                 goto out;
2012         }
2013
2014         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2015
2016  out:
2017         cfg80211_unlock_rdev(rdev);
2018         dev_put(dev);
2019  out_rtnl:
2020         rtnl_unlock();
2021
2022         return err;
2023 }
2024
2025 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2026                                 int flags, struct net_device *dev,
2027                                 u8 *dst, u8 *next_hop,
2028                                 struct mpath_info *pinfo)
2029 {
2030         void *hdr;
2031         struct nlattr *pinfoattr;
2032
2033         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2034         if (!hdr)
2035                 return -1;
2036
2037         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2038         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2039         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2040
2041         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2042         if (!pinfoattr)
2043                 goto nla_put_failure;
2044         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2045                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2046                             pinfo->frame_qlen);
2047         if (pinfo->filled & MPATH_INFO_DSN)
2048                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DSN,
2049                             pinfo->dsn);
2050         if (pinfo->filled & MPATH_INFO_METRIC)
2051                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2052                             pinfo->metric);
2053         if (pinfo->filled & MPATH_INFO_EXPTIME)
2054                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2055                             pinfo->exptime);
2056         if (pinfo->filled & MPATH_INFO_FLAGS)
2057                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2058                             pinfo->flags);
2059         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2060                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2061                             pinfo->discovery_timeout);
2062         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2063                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2064                             pinfo->discovery_retries);
2065
2066         nla_nest_end(msg, pinfoattr);
2067
2068         return genlmsg_end(msg, hdr);
2069
2070  nla_put_failure:
2071         genlmsg_cancel(msg, hdr);
2072         return -EMSGSIZE;
2073 }
2074
2075 static int nl80211_dump_mpath(struct sk_buff *skb,
2076                               struct netlink_callback *cb)
2077 {
2078         struct mpath_info pinfo;
2079         struct cfg80211_registered_device *dev;
2080         struct net_device *netdev;
2081         u8 dst[ETH_ALEN];
2082         u8 next_hop[ETH_ALEN];
2083         int ifidx = cb->args[0];
2084         int path_idx = cb->args[1];
2085         int err;
2086
2087         if (!ifidx) {
2088                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
2089                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
2090                                   nl80211_policy);
2091                 if (err)
2092                         return err;
2093
2094                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
2095                         return -EINVAL;
2096
2097                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
2098                 if (!ifidx)
2099                         return -EINVAL;
2100         }
2101
2102         rtnl_lock();
2103
2104         netdev = __dev_get_by_index(&init_net, ifidx);
2105         if (!netdev) {
2106                 err = -ENODEV;
2107                 goto out_rtnl;
2108         }
2109
2110         dev = cfg80211_get_dev_from_ifindex(ifidx);
2111         if (IS_ERR(dev)) {
2112                 err = PTR_ERR(dev);
2113                 goto out_rtnl;
2114         }
2115
2116         if (!dev->ops->dump_mpath) {
2117                 err = -EOPNOTSUPP;
2118                 goto out_err;
2119         }
2120
2121         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2122                 err = -EOPNOTSUPP;
2123                 goto out;
2124         }
2125
2126         while (1) {
2127                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2128                                            dst, next_hop, &pinfo);
2129                 if (err == -ENOENT)
2130                         break;
2131                 if (err)
2132                         goto out_err;
2133
2134                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2135                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2136                                        netdev, dst, next_hop,
2137                                        &pinfo) < 0)
2138                         goto out;
2139
2140                 path_idx++;
2141         }
2142
2143
2144  out:
2145         cb->args[1] = path_idx;
2146         err = skb->len;
2147  out_err:
2148         cfg80211_unlock_rdev(dev);
2149  out_rtnl:
2150         rtnl_unlock();
2151
2152         return err;
2153 }
2154
2155 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2156 {
2157         struct cfg80211_registered_device *rdev;
2158         int err;
2159         struct net_device *dev;
2160         struct mpath_info pinfo;
2161         struct sk_buff *msg;
2162         u8 *dst = NULL;
2163         u8 next_hop[ETH_ALEN];
2164
2165         memset(&pinfo, 0, sizeof(pinfo));
2166
2167         if (!info->attrs[NL80211_ATTR_MAC])
2168                 return -EINVAL;
2169
2170         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2171
2172         rtnl_lock();
2173
2174         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2175         if (err)
2176                 goto out_rtnl;
2177
2178         if (!rdev->ops->get_mpath) {
2179                 err = -EOPNOTSUPP;
2180                 goto out;
2181         }
2182
2183         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2184                 err = -EOPNOTSUPP;
2185                 goto out;
2186         }
2187
2188         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2189         if (err)
2190                 goto out;
2191
2192         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2193         if (!msg)
2194                 goto out;
2195
2196         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2197                                  dev, dst, next_hop, &pinfo) < 0)
2198                 goto out_free;
2199
2200         err = genlmsg_reply(msg, info);
2201         goto out;
2202
2203  out_free:
2204         nlmsg_free(msg);
2205  out:
2206         cfg80211_unlock_rdev(rdev);
2207         dev_put(dev);
2208  out_rtnl:
2209         rtnl_unlock();
2210
2211         return err;
2212 }
2213
2214 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2215 {
2216         struct cfg80211_registered_device *rdev;
2217         int err;
2218         struct net_device *dev;
2219         u8 *dst = NULL;
2220         u8 *next_hop = NULL;
2221
2222         if (!info->attrs[NL80211_ATTR_MAC])
2223                 return -EINVAL;
2224
2225         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2226                 return -EINVAL;
2227
2228         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2229         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2230
2231         rtnl_lock();
2232
2233         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2234         if (err)
2235                 goto out_rtnl;
2236
2237         if (!rdev->ops->change_mpath) {
2238                 err = -EOPNOTSUPP;
2239                 goto out;
2240         }
2241
2242         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2243                 err = -EOPNOTSUPP;
2244                 goto out;
2245         }
2246
2247         if (!netif_running(dev)) {
2248                 err = -ENETDOWN;
2249                 goto out;
2250         }
2251
2252         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2253
2254  out:
2255         cfg80211_unlock_rdev(rdev);
2256         dev_put(dev);
2257  out_rtnl:
2258         rtnl_unlock();
2259
2260         return err;
2261 }
2262 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2263 {
2264         struct cfg80211_registered_device *rdev;
2265         int err;
2266         struct net_device *dev;
2267         u8 *dst = NULL;
2268         u8 *next_hop = NULL;
2269
2270         if (!info->attrs[NL80211_ATTR_MAC])
2271                 return -EINVAL;
2272
2273         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2274                 return -EINVAL;
2275
2276         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2277         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2278
2279         rtnl_lock();
2280
2281         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2282         if (err)
2283                 goto out_rtnl;
2284
2285         if (!rdev->ops->add_mpath) {
2286                 err = -EOPNOTSUPP;
2287                 goto out;
2288         }
2289
2290         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2291                 err = -EOPNOTSUPP;
2292                 goto out;
2293         }
2294
2295         if (!netif_running(dev)) {
2296                 err = -ENETDOWN;
2297                 goto out;
2298         }
2299
2300         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2301
2302  out:
2303         cfg80211_unlock_rdev(rdev);
2304         dev_put(dev);
2305  out_rtnl:
2306         rtnl_unlock();
2307
2308         return err;
2309 }
2310
2311 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2312 {
2313         struct cfg80211_registered_device *rdev;
2314         int err;
2315         struct net_device *dev;
2316         u8 *dst = NULL;
2317
2318         if (info->attrs[NL80211_ATTR_MAC])
2319                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2320
2321         rtnl_lock();
2322
2323         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2324         if (err)
2325                 goto out_rtnl;
2326
2327         if (!rdev->ops->del_mpath) {
2328                 err = -EOPNOTSUPP;
2329                 goto out;
2330         }
2331
2332         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2333
2334  out:
2335         cfg80211_unlock_rdev(rdev);
2336         dev_put(dev);
2337  out_rtnl:
2338         rtnl_unlock();
2339
2340         return err;
2341 }
2342
2343 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2344 {
2345         struct cfg80211_registered_device *rdev;
2346         int err;
2347         struct net_device *dev;
2348         struct bss_parameters params;
2349
2350         memset(&params, 0, sizeof(params));
2351         /* default to not changing parameters */
2352         params.use_cts_prot = -1;
2353         params.use_short_preamble = -1;
2354         params.use_short_slot_time = -1;
2355
2356         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2357                 params.use_cts_prot =
2358                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2359         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2360                 params.use_short_preamble =
2361                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2362         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2363                 params.use_short_slot_time =
2364                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2365         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2366                 params.basic_rates =
2367                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2368                 params.basic_rates_len =
2369                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2370         }
2371
2372         rtnl_lock();
2373
2374         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2375         if (err)
2376                 goto out_rtnl;
2377
2378         if (!rdev->ops->change_bss) {
2379                 err = -EOPNOTSUPP;
2380                 goto out;
2381         }
2382
2383         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP) {
2384                 err = -EOPNOTSUPP;
2385                 goto out;
2386         }
2387
2388         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2389
2390  out:
2391         cfg80211_unlock_rdev(rdev);
2392         dev_put(dev);
2393  out_rtnl:
2394         rtnl_unlock();
2395
2396         return err;
2397 }
2398
2399 static const struct nla_policy
2400         reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2401         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2402         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2403         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2404         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2405         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2406         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2407 };
2408
2409 static int parse_reg_rule(struct nlattr *tb[],
2410         struct ieee80211_reg_rule *reg_rule)
2411 {
2412         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2413         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2414
2415         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2416                 return -EINVAL;
2417         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2418                 return -EINVAL;
2419         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2420                 return -EINVAL;
2421         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2422                 return -EINVAL;
2423         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2424                 return -EINVAL;
2425
2426         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2427
2428         freq_range->start_freq_khz =
2429                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2430         freq_range->end_freq_khz =
2431                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2432         freq_range->max_bandwidth_khz =
2433                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2434
2435         power_rule->max_eirp =
2436                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2437
2438         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2439                 power_rule->max_antenna_gain =
2440                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2441
2442         return 0;
2443 }
2444
2445 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2446 {
2447         int r;
2448         char *data = NULL;
2449
2450         /*
2451          * You should only get this when cfg80211 hasn't yet initialized
2452          * completely when built-in to the kernel right between the time
2453          * window between nl80211_init() and regulatory_init(), if that is
2454          * even possible.
2455          */
2456         mutex_lock(&cfg80211_mutex);
2457         if (unlikely(!cfg80211_regdomain)) {
2458                 mutex_unlock(&cfg80211_mutex);
2459                 return -EINPROGRESS;
2460         }
2461         mutex_unlock(&cfg80211_mutex);
2462
2463         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2464                 return -EINVAL;
2465
2466         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2467
2468 #ifdef CONFIG_WIRELESS_OLD_REGULATORY
2469         /* We ignore world regdom requests with the old regdom setup */
2470         if (is_world_regdom(data))
2471                 return -EINVAL;
2472 #endif
2473
2474         r = regulatory_hint_user(data);
2475
2476         return r;
2477 }
2478
2479 static int nl80211_get_mesh_params(struct sk_buff *skb,
2480         struct genl_info *info)
2481 {
2482         struct cfg80211_registered_device *rdev;
2483         struct mesh_config cur_params;
2484         int err;
2485         struct net_device *dev;
2486         void *hdr;
2487         struct nlattr *pinfoattr;
2488         struct sk_buff *msg;
2489
2490         rtnl_lock();
2491
2492         /* Look up our device */
2493         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2494         if (err)
2495                 goto out_rtnl;
2496
2497         if (!rdev->ops->get_mesh_params) {
2498                 err = -EOPNOTSUPP;
2499                 goto out;
2500         }
2501
2502         /* Get the mesh params */
2503         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2504         if (err)
2505                 goto out;
2506
2507         /* Draw up a netlink message to send back */
2508         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2509         if (!msg) {
2510                 err = -ENOBUFS;
2511                 goto out;
2512         }
2513         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2514                              NL80211_CMD_GET_MESH_PARAMS);
2515         if (!hdr)
2516                 goto nla_put_failure;
2517         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2518         if (!pinfoattr)
2519                 goto nla_put_failure;
2520         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2521         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2522                         cur_params.dot11MeshRetryTimeout);
2523         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2524                         cur_params.dot11MeshConfirmTimeout);
2525         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2526                         cur_params.dot11MeshHoldingTimeout);
2527         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2528                         cur_params.dot11MeshMaxPeerLinks);
2529         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2530                         cur_params.dot11MeshMaxRetries);
2531         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2532                         cur_params.dot11MeshTTL);
2533         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2534                         cur_params.auto_open_plinks);
2535         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2536                         cur_params.dot11MeshHWMPmaxPREQretries);
2537         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2538                         cur_params.path_refresh_time);
2539         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2540                         cur_params.min_discovery_timeout);
2541         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2542                         cur_params.dot11MeshHWMPactivePathTimeout);
2543         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2544                         cur_params.dot11MeshHWMPpreqMinInterval);
2545         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2546                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2547         nla_nest_end(msg, pinfoattr);
2548         genlmsg_end(msg, hdr);
2549         err = genlmsg_reply(msg, info);
2550         goto out;
2551
2552  nla_put_failure:
2553         genlmsg_cancel(msg, hdr);
2554         err = -EMSGSIZE;
2555  out:
2556         /* Cleanup */
2557         cfg80211_unlock_rdev(rdev);
2558         dev_put(dev);
2559  out_rtnl:
2560         rtnl_unlock();
2561
2562         return err;
2563 }
2564
2565 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2566 do {\
2567         if (table[attr_num]) {\
2568                 cfg.param = nla_fn(table[attr_num]); \
2569                 mask |= (1 << (attr_num - 1)); \
2570         } \
2571 } while (0);\
2572
2573 static struct nla_policy
2574 nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] __read_mostly = {
2575         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2576         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2577         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2578         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2579         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2580         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2581         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2582
2583         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2584         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2585         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2586         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2587         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2588         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2589 };
2590
2591 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2592 {
2593         int err;
2594         u32 mask;
2595         struct cfg80211_registered_device *rdev;
2596         struct net_device *dev;
2597         struct mesh_config cfg;
2598         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2599         struct nlattr *parent_attr;
2600
2601         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2602         if (!parent_attr)
2603                 return -EINVAL;
2604         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2605                         parent_attr, nl80211_meshconf_params_policy))
2606                 return -EINVAL;
2607
2608         rtnl_lock();
2609
2610         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2611         if (err)
2612                 goto out_rtnl;
2613
2614         if (!rdev->ops->set_mesh_params) {
2615                 err = -EOPNOTSUPP;
2616                 goto out;
2617         }
2618
2619         /* This makes sure that there aren't more than 32 mesh config
2620          * parameters (otherwise our bitfield scheme would not work.) */
2621         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2622
2623         /* Fill in the params struct */
2624         mask = 0;
2625         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2626                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2627         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2628                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2629         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2630                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2631         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2632                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2633         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2634                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2635         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2636                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2637         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2638                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2639         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2640                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2641                         nla_get_u8);
2642         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2643                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2644         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2645                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2646                         nla_get_u16);
2647         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2648                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2649                         nla_get_u32);
2650         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2651                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2652                         nla_get_u16);
2653         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2654                         dot11MeshHWMPnetDiameterTraversalTime,
2655                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2656                         nla_get_u16);
2657
2658         /* Apply changes */
2659         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2660
2661  out:
2662         /* cleanup */
2663         cfg80211_unlock_rdev(rdev);
2664         dev_put(dev);
2665  out_rtnl:
2666         rtnl_unlock();
2667
2668         return err;
2669 }
2670
2671 #undef FILL_IN_MESH_PARAM_IF_SET
2672
2673 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2674 {
2675         struct sk_buff *msg;
2676         void *hdr = NULL;
2677         struct nlattr *nl_reg_rules;
2678         unsigned int i;
2679         int err = -EINVAL;
2680
2681         mutex_lock(&cfg80211_mutex);
2682
2683         if (!cfg80211_regdomain)
2684                 goto out;
2685
2686         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2687         if (!msg) {
2688                 err = -ENOBUFS;
2689                 goto out;
2690         }
2691
2692         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2693                              NL80211_CMD_GET_REG);
2694         if (!hdr)
2695                 goto nla_put_failure;
2696
2697         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2698                 cfg80211_regdomain->alpha2);
2699
2700         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2701         if (!nl_reg_rules)
2702                 goto nla_put_failure;
2703
2704         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2705                 struct nlattr *nl_reg_rule;
2706                 const struct ieee80211_reg_rule *reg_rule;
2707                 const struct ieee80211_freq_range *freq_range;
2708                 const struct ieee80211_power_rule *power_rule;
2709
2710                 reg_rule = &cfg80211_regdomain->reg_rules[i];
2711                 freq_range = &reg_rule->freq_range;
2712                 power_rule = &reg_rule->power_rule;
2713
2714                 nl_reg_rule = nla_nest_start(msg, i);
2715                 if (!nl_reg_rule)
2716                         goto nla_put_failure;
2717
2718                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
2719                         reg_rule->flags);
2720                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
2721                         freq_range->start_freq_khz);
2722                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
2723                         freq_range->end_freq_khz);
2724                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
2725                         freq_range->max_bandwidth_khz);
2726                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
2727                         power_rule->max_antenna_gain);
2728                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
2729                         power_rule->max_eirp);
2730
2731                 nla_nest_end(msg, nl_reg_rule);
2732         }
2733
2734         nla_nest_end(msg, nl_reg_rules);
2735
2736         genlmsg_end(msg, hdr);
2737         err = genlmsg_reply(msg, info);
2738         goto out;
2739
2740 nla_put_failure:
2741         genlmsg_cancel(msg, hdr);
2742         err = -EMSGSIZE;
2743 out:
2744         mutex_unlock(&cfg80211_mutex);
2745         return err;
2746 }
2747
2748 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
2749 {
2750         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
2751         struct nlattr *nl_reg_rule;
2752         char *alpha2 = NULL;
2753         int rem_reg_rules = 0, r = 0;
2754         u32 num_rules = 0, rule_idx = 0, size_of_regd;
2755         struct ieee80211_regdomain *rd = NULL;
2756
2757         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2758                 return -EINVAL;
2759
2760         if (!info->attrs[NL80211_ATTR_REG_RULES])
2761                 return -EINVAL;
2762
2763         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2764
2765         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2766                         rem_reg_rules) {
2767                 num_rules++;
2768                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
2769                         return -EINVAL;
2770         }
2771
2772         mutex_lock(&cfg80211_mutex);
2773
2774         if (!reg_is_valid_request(alpha2)) {
2775                 r = -EINVAL;
2776                 goto bad_reg;
2777         }
2778
2779         size_of_regd = sizeof(struct ieee80211_regdomain) +
2780                 (num_rules * sizeof(struct ieee80211_reg_rule));
2781
2782         rd = kzalloc(size_of_regd, GFP_KERNEL);
2783         if (!rd) {
2784                 r = -ENOMEM;
2785                 goto bad_reg;
2786         }
2787
2788         rd->n_reg_rules = num_rules;
2789         rd->alpha2[0] = alpha2[0];
2790         rd->alpha2[1] = alpha2[1];
2791
2792         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
2793                         rem_reg_rules) {
2794                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
2795                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
2796                         reg_rule_policy);
2797                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
2798                 if (r)
2799                         goto bad_reg;
2800
2801                 rule_idx++;
2802
2803                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
2804                         r = -EINVAL;
2805                         goto bad_reg;
2806                 }
2807         }
2808
2809         BUG_ON(rule_idx != num_rules);
2810
2811         r = set_regdom(rd);
2812
2813         mutex_unlock(&cfg80211_mutex);
2814
2815         return r;
2816
2817  bad_reg:
2818         mutex_unlock(&cfg80211_mutex);
2819         kfree(rd);
2820         return r;
2821 }
2822
2823 static int validate_scan_freqs(struct nlattr *freqs)
2824 {
2825         struct nlattr *attr1, *attr2;
2826         int n_channels = 0, tmp1, tmp2;
2827
2828         nla_for_each_nested(attr1, freqs, tmp1) {
2829                 n_channels++;
2830                 /*
2831                  * Some hardware has a limited channel list for
2832                  * scanning, and it is pretty much nonsensical
2833                  * to scan for a channel twice, so disallow that
2834                  * and don't require drivers to check that the
2835                  * channel list they get isn't longer than what
2836                  * they can scan, as long as they can scan all
2837                  * the channels they registered at once.
2838                  */
2839                 nla_for_each_nested(attr2, freqs, tmp2)
2840                         if (attr1 != attr2 &&
2841                             nla_get_u32(attr1) == nla_get_u32(attr2))
2842                                 return 0;
2843         }
2844
2845         return n_channels;
2846 }
2847
2848 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
2849 {
2850         struct cfg80211_registered_device *rdev;
2851         struct net_device *dev;
2852         struct cfg80211_scan_request *request;
2853         struct cfg80211_ssid *ssid;
2854         struct ieee80211_channel *channel;
2855         struct nlattr *attr;
2856         struct wiphy *wiphy;
2857         int err, tmp, n_ssids = 0, n_channels, i;
2858         enum ieee80211_band band;
2859         size_t ie_len;
2860
2861         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
2862                 return -EINVAL;
2863
2864         rtnl_lock();
2865
2866         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
2867         if (err)
2868                 goto out_rtnl;
2869
2870         wiphy = &rdev->wiphy;
2871
2872         if (!rdev->ops->scan) {
2873                 err = -EOPNOTSUPP;
2874                 goto out;
2875         }
2876
2877         if (!netif_running(dev)) {
2878                 err = -ENETDOWN;
2879                 goto out;
2880         }
2881
2882         if (rdev->scan_req) {
2883                 err = -EBUSY;
2884                 goto out;
2885         }
2886
2887         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2888                 n_channels = validate_scan_freqs(
2889                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
2890                 if (!n_channels) {
2891                         err = -EINVAL;
2892                         goto out;
2893                 }
2894         } else {
2895                 n_channels = 0;
2896
2897                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
2898                         if (wiphy->bands[band])
2899                                 n_channels += wiphy->bands[band]->n_channels;
2900         }
2901
2902         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
2903                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
2904                         n_ssids++;
2905
2906         if (n_ssids > wiphy->max_scan_ssids) {
2907                 err = -EINVAL;
2908                 goto out;
2909         }
2910
2911         if (info->attrs[NL80211_ATTR_IE])
2912                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2913         else
2914                 ie_len = 0;
2915
2916         if (ie_len > wiphy->max_scan_ie_len) {
2917                 err = -EINVAL;
2918                 goto out;
2919         }
2920
2921         request = kzalloc(sizeof(*request)
2922                         + sizeof(*ssid) * n_ssids
2923                         + sizeof(channel) * n_channels
2924                         + ie_len, GFP_KERNEL);
2925         if (!request) {
2926                 err = -ENOMEM;
2927                 goto out;
2928         }
2929
2930         request->channels = (void *)((char *)request + sizeof(*request));
2931         request->n_channels = n_channels;
2932         if (n_ssids)
2933                 request->ssids = (void *)(request->channels + n_channels);
2934         request->n_ssids = n_ssids;
2935         if (ie_len) {
2936                 if (request->ssids)
2937                         request->ie = (void *)(request->ssids + n_ssids);
2938                 else
2939                         request->ie = (void *)(request->channels + n_channels);
2940         }
2941
2942         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
2943                 /* user specified, bail out if channel not found */
2944                 request->n_channels = n_channels;
2945                 i = 0;
2946                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
2947                         request->channels[i] = ieee80211_get_channel(wiphy, nla_get_u32(attr));
2948                         if (!request->channels[i]) {
2949                                 err = -EINVAL;
2950                                 goto out_free;
2951                         }
2952                         i++;
2953                 }
2954         } else {
2955                 /* all channels */
2956                 i = 0;
2957                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
2958                         int j;
2959                         if (!wiphy->bands[band])
2960                                 continue;
2961                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
2962                                 request->channels[i] = &wiphy->bands[band]->channels[j];
2963                                 i++;
2964                         }
2965                 }
2966         }
2967
2968         i = 0;
2969         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
2970                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
2971                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
2972                                 err = -EINVAL;
2973                                 goto out_free;
2974                         }
2975                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
2976                         request->ssids[i].ssid_len = nla_len(attr);
2977                         i++;
2978                 }
2979         }
2980
2981         if (info->attrs[NL80211_ATTR_IE]) {
2982                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2983                 memcpy((void *)request->ie,
2984                        nla_data(info->attrs[NL80211_ATTR_IE]),
2985                        request->ie_len);
2986         }
2987
2988         request->ifidx = dev->ifindex;
2989         request->wiphy = &rdev->wiphy;
2990
2991         rdev->scan_req = request;
2992         err = rdev->ops->scan(&rdev->wiphy, dev, request);
2993
2994         if (!err)
2995                 nl80211_send_scan_start(rdev, dev);
2996
2997  out_free:
2998         if (err) {
2999                 rdev->scan_req = NULL;
3000                 kfree(request);
3001         }
3002  out:
3003         cfg80211_unlock_rdev(rdev);
3004         dev_put(dev);
3005  out_rtnl:
3006         rtnl_unlock();
3007
3008         return err;
3009 }
3010
3011 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3012                             struct cfg80211_registered_device *rdev,
3013                             struct net_device *dev,
3014                             struct cfg80211_bss *res)
3015 {
3016         void *hdr;
3017         struct nlattr *bss;
3018
3019         hdr = nl80211hdr_put(msg, pid, seq, flags,
3020                              NL80211_CMD_NEW_SCAN_RESULTS);
3021         if (!hdr)
3022                 return -1;
3023
3024         NLA_PUT_U32(msg, NL80211_ATTR_SCAN_GENERATION,
3025                     rdev->bss_generation);
3026         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3027
3028         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3029         if (!bss)
3030                 goto nla_put_failure;
3031         if (!is_zero_ether_addr(res->bssid))
3032                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3033         if (res->information_elements && res->len_information_elements)
3034                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3035                         res->len_information_elements,
3036                         res->information_elements);
3037         if (res->tsf)
3038                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3039         if (res->beacon_interval)
3040                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3041         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3042         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3043
3044         switch (rdev->wiphy.signal_type) {
3045         case CFG80211_SIGNAL_TYPE_MBM:
3046                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3047                 break;
3048         case CFG80211_SIGNAL_TYPE_UNSPEC:
3049                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3050                 break;
3051         default:
3052                 break;
3053         }
3054
3055         nla_nest_end(msg, bss);
3056
3057         return genlmsg_end(msg, hdr);
3058
3059  nla_put_failure:
3060         genlmsg_cancel(msg, hdr);
3061         return -EMSGSIZE;
3062 }
3063
3064 static int nl80211_dump_scan(struct sk_buff *skb,
3065                              struct netlink_callback *cb)
3066 {
3067         struct cfg80211_registered_device *dev;
3068         struct net_device *netdev;
3069         struct cfg80211_internal_bss *scan;
3070         int ifidx = cb->args[0];
3071         int start = cb->args[1], idx = 0;
3072         int err;
3073
3074         if (!ifidx) {
3075                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
3076                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
3077                                   nl80211_policy);
3078                 if (err)
3079                         return err;
3080
3081                 if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
3082                         return -EINVAL;
3083
3084                 ifidx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
3085                 if (!ifidx)
3086                         return -EINVAL;
3087                 cb->args[0] = ifidx;
3088         }
3089
3090         netdev = dev_get_by_index(&init_net, ifidx);
3091         if (!netdev)
3092                 return -ENODEV;
3093
3094         dev = cfg80211_get_dev_from_ifindex(ifidx);
3095         if (IS_ERR(dev)) {
3096                 err = PTR_ERR(dev);
3097                 goto out_put_netdev;
3098         }
3099
3100         spin_lock_bh(&dev->bss_lock);
3101         cfg80211_bss_expire(dev);
3102
3103         list_for_each_entry(scan, &dev->bss_list, list) {
3104                 if (++idx <= start)
3105                         continue;
3106                 if (nl80211_send_bss(skb,
3107                                 NETLINK_CB(cb->skb).pid,
3108                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3109                                 dev, netdev, &scan->pub) < 0) {
3110                         idx--;
3111                         goto out;
3112                 }
3113         }
3114
3115  out:
3116         spin_unlock_bh(&dev->bss_lock);
3117
3118         cb->args[1] = idx;
3119         err = skb->len;
3120         cfg80211_unlock_rdev(dev);
3121  out_put_netdev:
3122         dev_put(netdev);
3123
3124         return err;
3125 }
3126
3127 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3128 {
3129         return auth_type <= NL80211_AUTHTYPE_MAX;
3130 }
3131
3132 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3133 {
3134         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3135                                   NL80211_WPA_VERSION_2));
3136 }
3137
3138 static bool nl80211_valid_akm_suite(u32 akm)
3139 {
3140         return akm == WLAN_AKM_SUITE_8021X ||
3141                 akm == WLAN_AKM_SUITE_PSK;
3142 }
3143
3144 static bool nl80211_valid_cipher_suite(u32 cipher)
3145 {
3146         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3147                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3148                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3149                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3150                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3151 }
3152
3153
3154 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3155 {
3156         struct cfg80211_registered_device *rdev;
3157         struct net_device *dev;
3158         struct ieee80211_channel *chan;
3159         const u8 *bssid, *ssid, *ie = NULL;
3160         int err, ssid_len, ie_len = 0;
3161         enum nl80211_auth_type auth_type;
3162
3163         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3164                 return -EINVAL;
3165
3166         if (!info->attrs[NL80211_ATTR_MAC])
3167                 return -EINVAL;
3168
3169         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3170                 return -EINVAL;
3171
3172         if (!info->attrs[NL80211_ATTR_SSID])
3173                 return -EINVAL;
3174
3175         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3176                 return -EINVAL;
3177
3178         rtnl_lock();
3179
3180         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3181         if (err)
3182                 goto unlock_rtnl;
3183
3184         if (!rdev->ops->auth) {
3185                 err = -EOPNOTSUPP;
3186                 goto out;
3187         }
3188
3189         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3190                 err = -EOPNOTSUPP;
3191                 goto out;
3192         }
3193
3194         if (!netif_running(dev)) {
3195                 err = -ENETDOWN;
3196                 goto out;
3197         }
3198
3199         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3200         chan = ieee80211_get_channel(&rdev->wiphy,
3201                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3202         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3203                 err = -EINVAL;
3204                 goto out;
3205         }
3206
3207         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3208         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3209
3210         if (info->attrs[NL80211_ATTR_IE]) {
3211                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3212                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3213         }
3214
3215         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3216         if (!nl80211_valid_auth_type(auth_type)) {
3217                 err = -EINVAL;
3218                 goto out;
3219         }
3220
3221         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3222                                  ssid, ssid_len, ie, ie_len);
3223
3224 out:
3225         cfg80211_unlock_rdev(rdev);
3226         dev_put(dev);
3227 unlock_rtnl:
3228         rtnl_unlock();
3229         return err;
3230 }
3231
3232 static int nl80211_crypto_settings(struct genl_info *info,
3233                                    struct cfg80211_crypto_settings *settings,
3234                                    int cipher_limit)
3235 {
3236         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3237
3238         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3239                 void *data;
3240                 int len, i;
3241
3242                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3243                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3244                 settings->n_ciphers_pairwise = len / sizeof(u32);
3245
3246                 if (len % sizeof(u32))
3247                         return -EINVAL;
3248
3249                 if (settings->n_ciphers_pairwise > cipher_limit)
3250                         return -EINVAL;
3251
3252                 memcpy(settings->ciphers_pairwise, data, len);
3253
3254                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3255                         if (!nl80211_valid_cipher_suite(
3256                                         settings->ciphers_pairwise[i]))
3257                                 return -EINVAL;
3258         }
3259
3260         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3261                 settings->cipher_group =
3262                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3263                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3264                         return -EINVAL;
3265         }
3266
3267         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3268                 settings->wpa_versions =
3269                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3270                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3271                         return -EINVAL;
3272         }
3273
3274         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3275                 void *data;
3276                 int len, i;
3277
3278                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3279                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3280                 settings->n_akm_suites = len / sizeof(u32);
3281
3282                 if (len % sizeof(u32))
3283                         return -EINVAL;
3284
3285                 memcpy(settings->akm_suites, data, len);
3286
3287                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3288                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3289                                 return -EINVAL;
3290         }
3291
3292         return 0;
3293 }
3294
3295 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3296 {
3297         struct cfg80211_registered_device *rdev;
3298         struct net_device *dev;
3299         struct cfg80211_crypto_settings crypto;
3300         struct ieee80211_channel *chan;
3301         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3302         int err, ssid_len, ie_len = 0;
3303         bool use_mfp = false;
3304
3305         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3306                 return -EINVAL;
3307
3308         if (!info->attrs[NL80211_ATTR_MAC] ||
3309             !info->attrs[NL80211_ATTR_SSID] ||
3310             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3311                 return -EINVAL;
3312
3313         rtnl_lock();
3314
3315         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3316         if (err)
3317                 goto unlock_rtnl;
3318
3319         if (!rdev->ops->assoc) {
3320                 err = -EOPNOTSUPP;
3321                 goto out;
3322         }
3323
3324         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3325                 err = -EOPNOTSUPP;
3326                 goto out;
3327         }
3328
3329         if (!netif_running(dev)) {
3330                 err = -ENETDOWN;
3331                 goto out;
3332         }
3333
3334         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3335
3336         chan = ieee80211_get_channel(&rdev->wiphy,
3337                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3338         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3339                 err = -EINVAL;
3340                 goto out;
3341         }
3342
3343         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3344         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3345
3346         if (info->attrs[NL80211_ATTR_IE]) {
3347                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3348                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3349         }
3350
3351         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3352                 enum nl80211_mfp mfp =
3353                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3354                 if (mfp == NL80211_MFP_REQUIRED)
3355                         use_mfp = true;
3356                 else if (mfp != NL80211_MFP_NO) {
3357                         err = -EINVAL;
3358                         goto out;
3359                 }
3360         }
3361
3362         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3363                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3364
3365         err = nl80211_crypto_settings(info, &crypto, 1);
3366         if (!err)
3367                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3368                                           ssid, ssid_len, ie, ie_len, use_mfp,
3369                                           &crypto);
3370
3371 out:
3372         cfg80211_unlock_rdev(rdev);
3373         dev_put(dev);
3374 unlock_rtnl:
3375         rtnl_unlock();
3376         return err;
3377 }
3378
3379 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3380 {
3381         struct cfg80211_registered_device *rdev;
3382         struct net_device *dev;
3383         const u8 *ie = NULL, *bssid;
3384         int err, ie_len = 0;
3385         u16 reason_code;
3386
3387         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3388                 return -EINVAL;
3389
3390         if (!info->attrs[NL80211_ATTR_MAC])
3391                 return -EINVAL;
3392
3393         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3394                 return -EINVAL;
3395
3396         rtnl_lock();
3397
3398         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3399         if (err)
3400                 goto unlock_rtnl;
3401
3402         if (!rdev->ops->deauth) {
3403                 err = -EOPNOTSUPP;
3404                 goto out;
3405         }
3406
3407         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3408                 err = -EOPNOTSUPP;
3409                 goto out;
3410         }
3411
3412         if (!netif_running(dev)) {
3413                 err = -ENETDOWN;
3414                 goto out;
3415         }
3416
3417         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3418
3419         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3420         if (reason_code == 0) {
3421                 /* Reason Code 0 is reserved */
3422                 err = -EINVAL;
3423                 goto out;
3424         }
3425
3426         if (info->attrs[NL80211_ATTR_IE]) {
3427                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3428                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3429         }
3430
3431         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code);
3432
3433 out:
3434         cfg80211_unlock_rdev(rdev);
3435         dev_put(dev);
3436 unlock_rtnl:
3437         rtnl_unlock();
3438         return err;
3439 }
3440
3441 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3442 {
3443         struct cfg80211_registered_device *rdev;
3444         struct net_device *dev;
3445         const u8 *ie = NULL, *bssid;
3446         int err, ie_len = 0;
3447         u16 reason_code;
3448
3449         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3450                 return -EINVAL;
3451
3452         if (!info->attrs[NL80211_ATTR_MAC])
3453                 return -EINVAL;
3454
3455         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3456                 return -EINVAL;
3457
3458         rtnl_lock();
3459
3460         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3461         if (err)
3462                 goto unlock_rtnl;
3463
3464         if (!rdev->ops->disassoc) {
3465                 err = -EOPNOTSUPP;
3466                 goto out;
3467         }
3468
3469         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3470                 err = -EOPNOTSUPP;
3471                 goto out;
3472         }
3473
3474         if (!netif_running(dev)) {
3475                 err = -ENETDOWN;
3476                 goto out;
3477         }
3478
3479         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3480
3481         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3482         if (reason_code == 0) {
3483                 /* Reason Code 0 is reserved */
3484                 err = -EINVAL;
3485                 goto out;
3486         }
3487
3488         if (info->attrs[NL80211_ATTR_IE]) {
3489                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3490                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3491         }
3492
3493         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code);
3494
3495 out:
3496         cfg80211_unlock_rdev(rdev);
3497         dev_put(dev);
3498 unlock_rtnl:
3499         rtnl_unlock();
3500         return err;
3501 }
3502
3503 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
3504 {
3505         struct cfg80211_registered_device *rdev;
3506         struct net_device *dev;
3507         struct cfg80211_ibss_params ibss;
3508         struct wiphy *wiphy;
3509         int err;
3510
3511         memset(&ibss, 0, sizeof(ibss));
3512
3513         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3514                 return -EINVAL;
3515
3516         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
3517             !info->attrs[NL80211_ATTR_SSID] ||
3518             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3519                 return -EINVAL;
3520
3521         ibss.beacon_interval = 100;
3522
3523         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
3524                 ibss.beacon_interval =
3525                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
3526                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
3527                         return -EINVAL;
3528         }
3529
3530         rtnl_lock();
3531
3532         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3533         if (err)
3534                 goto unlock_rtnl;
3535
3536         if (!rdev->ops->join_ibss) {
3537                 err = -EOPNOTSUPP;
3538                 goto out;
3539         }
3540
3541         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3542                 err = -EOPNOTSUPP;
3543                 goto out;
3544         }
3545
3546         if (!netif_running(dev)) {
3547                 err = -ENETDOWN;
3548                 goto out;
3549         }
3550
3551         wiphy = &rdev->wiphy;
3552
3553         if (info->attrs[NL80211_ATTR_MAC])
3554                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3555         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3556         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3557
3558         if (info->attrs[NL80211_ATTR_IE]) {
3559                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3560                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3561         }
3562
3563         ibss.channel = ieee80211_get_channel(wiphy,
3564                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3565         if (!ibss.channel ||
3566             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
3567             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
3568                 err = -EINVAL;
3569                 goto out;
3570         }
3571
3572         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
3573
3574         err = cfg80211_join_ibss(rdev, dev, &ibss);
3575
3576 out:
3577         cfg80211_unlock_rdev(rdev);
3578         dev_put(dev);
3579 unlock_rtnl:
3580         rtnl_unlock();
3581         return err;
3582 }
3583
3584 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
3585 {
3586         struct cfg80211_registered_device *rdev;
3587         struct net_device *dev;
3588         int err;
3589
3590         rtnl_lock();
3591
3592         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3593         if (err)
3594                 goto unlock_rtnl;
3595
3596         if (!rdev->ops->leave_ibss) {
3597                 err = -EOPNOTSUPP;
3598                 goto out;
3599         }
3600
3601         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
3602                 err = -EOPNOTSUPP;
3603                 goto out;
3604         }
3605
3606         if (!netif_running(dev)) {
3607                 err = -ENETDOWN;
3608                 goto out;
3609         }
3610
3611         err = cfg80211_leave_ibss(rdev, dev, false);
3612
3613 out:
3614         cfg80211_unlock_rdev(rdev);
3615         dev_put(dev);
3616 unlock_rtnl:
3617         rtnl_unlock();
3618         return err;
3619 }
3620
3621 #ifdef CONFIG_NL80211_TESTMODE
3622 static struct genl_multicast_group nl80211_testmode_mcgrp = {
3623         .name = "testmode",
3624 };
3625
3626 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
3627 {
3628         struct cfg80211_registered_device *rdev;
3629         int err;
3630
3631         if (!info->attrs[NL80211_ATTR_TESTDATA])
3632                 return -EINVAL;
3633
3634         rtnl_lock();
3635
3636         rdev = cfg80211_get_dev_from_info(info);
3637         if (IS_ERR(rdev)) {
3638                 err = PTR_ERR(rdev);
3639                 goto unlock_rtnl;
3640         }
3641
3642         err = -EOPNOTSUPP;
3643         if (rdev->ops->testmode_cmd) {
3644                 rdev->testmode_info = info;
3645                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
3646                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
3647                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
3648                 rdev->testmode_info = NULL;
3649         }
3650
3651         cfg80211_unlock_rdev(rdev);
3652
3653  unlock_rtnl:
3654         rtnl_unlock();
3655         return err;
3656 }
3657
3658 static struct sk_buff *
3659 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
3660                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
3661 {
3662         struct sk_buff *skb;
3663         void *hdr;
3664         struct nlattr *data;
3665
3666         skb = nlmsg_new(approxlen + 100, gfp);
3667         if (!skb)
3668                 return NULL;
3669
3670         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
3671         if (!hdr) {
3672                 kfree_skb(skb);
3673                 return NULL;
3674         }
3675
3676         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
3677         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
3678
3679         ((void **)skb->cb)[0] = rdev;
3680         ((void **)skb->cb)[1] = hdr;
3681         ((void **)skb->cb)[2] = data;
3682
3683         return skb;
3684
3685  nla_put_failure:
3686         kfree_skb(skb);
3687         return NULL;
3688 }
3689
3690 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
3691                                                   int approxlen)
3692 {
3693         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3694
3695         if (WARN_ON(!rdev->testmode_info))
3696                 return NULL;
3697
3698         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
3699                                 rdev->testmode_info->snd_pid,
3700                                 rdev->testmode_info->snd_seq,
3701                                 GFP_KERNEL);
3702 }
3703 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
3704
3705 int cfg80211_testmode_reply(struct sk_buff *skb)
3706 {
3707         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
3708         void *hdr = ((void **)skb->cb)[1];
3709         struct nlattr *data = ((void **)skb->cb)[2];
3710
3711         if (WARN_ON(!rdev->testmode_info)) {
3712                 kfree_skb(skb);
3713                 return -EINVAL;
3714         }
3715
3716         nla_nest_end(skb, data);
3717         genlmsg_end(skb, hdr);
3718         return genlmsg_reply(skb, rdev->testmode_info);
3719 }
3720 EXPORT_SYMBOL(cfg80211_testmode_reply);
3721
3722 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
3723                                                   int approxlen, gfp_t gfp)
3724 {
3725         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
3726
3727         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
3728 }
3729 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
3730
3731 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
3732 {
3733         void *hdr = ((void **)skb->cb)[1];
3734         struct nlattr *data = ((void **)skb->cb)[2];
3735
3736         nla_nest_end(skb, data);
3737         genlmsg_end(skb, hdr);
3738         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
3739 }
3740 EXPORT_SYMBOL(cfg80211_testmode_event);
3741 #endif
3742
3743 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
3744 {
3745         struct cfg80211_registered_device *rdev;
3746         struct net_device *dev;
3747         struct cfg80211_connect_params connect;
3748         struct wiphy *wiphy;
3749         int err;
3750
3751         memset(&connect, 0, sizeof(connect));
3752
3753         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3754                 return -EINVAL;
3755
3756         if (!info->attrs[NL80211_ATTR_SSID] ||
3757             !nla_len(info->attrs[NL80211_ATTR_SSID]))
3758                 return -EINVAL;
3759
3760         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
3761                 connect.auth_type =
3762                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3763                 if (!nl80211_valid_auth_type(connect.auth_type))
3764                         return -EINVAL;
3765         } else
3766                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
3767
3768         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
3769
3770         err = nl80211_crypto_settings(info, &connect.crypto,
3771                                       NL80211_MAX_NR_CIPHER_SUITES);
3772         if (err)
3773                 return err;
3774         rtnl_lock();
3775
3776         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3777         if (err)
3778                 goto unlock_rtnl;
3779
3780         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3781                 err = -EOPNOTSUPP;
3782                 goto out;
3783         }
3784
3785         if (!netif_running(dev)) {
3786                 err = -ENETDOWN;
3787                 goto out;
3788         }
3789
3790         wiphy = &rdev->wiphy;
3791
3792         if (info->attrs[NL80211_ATTR_MAC])
3793                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3794         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3795         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3796
3797         if (info->attrs[NL80211_ATTR_IE]) {
3798                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3799                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3800         }
3801
3802         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
3803                 connect.channel =
3804                         ieee80211_get_channel(wiphy,
3805                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3806                 if (!connect.channel ||
3807                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
3808                         err = -EINVAL;
3809                         goto out;
3810                 }
3811         }
3812
3813         err = cfg80211_connect(rdev, dev, &connect);
3814
3815 out:
3816         cfg80211_unlock_rdev(rdev);
3817         dev_put(dev);
3818 unlock_rtnl:
3819         rtnl_unlock();
3820         return err;
3821 }
3822
3823 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
3824 {
3825         struct cfg80211_registered_device *rdev;
3826         struct net_device *dev;
3827         int err;
3828         u16 reason;
3829
3830         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3831                 reason = WLAN_REASON_DEAUTH_LEAVING;
3832         else
3833                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3834
3835         if (reason == 0)
3836                 return -EINVAL;
3837
3838         rtnl_lock();
3839
3840         err = get_rdev_dev_by_info_ifindex(info->attrs, &rdev, &dev);
3841         if (err)
3842                 goto unlock_rtnl;
3843
3844         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
3845                 err = -EOPNOTSUPP;
3846                 goto out;
3847         }
3848
3849         if (!netif_running(dev)) {
3850                 err = -ENETDOWN;
3851                 goto out;
3852         }
3853
3854         err = cfg80211_disconnect(rdev, dev, reason, true);
3855
3856 out:
3857         cfg80211_unlock_rdev(rdev);
3858         dev_put(dev);
3859 unlock_rtnl:
3860         rtnl_unlock();
3861         return err;
3862 }
3863
3864 static struct genl_ops nl80211_ops[] = {
3865         {
3866                 .cmd = NL80211_CMD_GET_WIPHY,
3867                 .doit = nl80211_get_wiphy,
3868                 .dumpit = nl80211_dump_wiphy,
3869                 .policy = nl80211_policy,
3870                 /* can be retrieved by unprivileged users */
3871         },
3872         {
3873                 .cmd = NL80211_CMD_SET_WIPHY,
3874                 .doit = nl80211_set_wiphy,
3875                 .policy = nl80211_policy,
3876                 .flags = GENL_ADMIN_PERM,
3877         },
3878         {
3879                 .cmd = NL80211_CMD_GET_INTERFACE,
3880                 .doit = nl80211_get_interface,
3881                 .dumpit = nl80211_dump_interface,
3882                 .policy = nl80211_policy,
3883                 /* can be retrieved by unprivileged users */
3884         },
3885         {
3886                 .cmd = NL80211_CMD_SET_INTERFACE,
3887                 .doit = nl80211_set_interface,
3888                 .policy = nl80211_policy,
3889                 .flags = GENL_ADMIN_PERM,
3890         },
3891         {
3892                 .cmd = NL80211_CMD_NEW_INTERFACE,
3893                 .doit = nl80211_new_interface,
3894                 .policy = nl80211_policy,
3895                 .flags = GENL_ADMIN_PERM,
3896         },
3897         {
3898                 .cmd = NL80211_CMD_DEL_INTERFACE,
3899                 .doit = nl80211_del_interface,
3900                 .policy = nl80211_policy,
3901                 .flags = GENL_ADMIN_PERM,
3902         },
3903         {
3904                 .cmd = NL80211_CMD_GET_KEY,
3905                 .doit = nl80211_get_key,
3906                 .policy = nl80211_policy,
3907                 .flags = GENL_ADMIN_PERM,
3908         },
3909         {
3910                 .cmd = NL80211_CMD_SET_KEY,
3911                 .doit = nl80211_set_key,
3912                 .policy = nl80211_policy,
3913                 .flags = GENL_ADMIN_PERM,
3914         },
3915         {
3916                 .cmd = NL80211_CMD_NEW_KEY,
3917                 .doit = nl80211_new_key,
3918                 .policy = nl80211_policy,
3919                 .flags = GENL_ADMIN_PERM,
3920         },
3921         {
3922                 .cmd = NL80211_CMD_DEL_KEY,
3923                 .doit = nl80211_del_key,
3924                 .policy = nl80211_policy,
3925                 .flags = GENL_ADMIN_PERM,
3926         },
3927         {
3928                 .cmd = NL80211_CMD_SET_BEACON,
3929                 .policy = nl80211_policy,
3930                 .flags = GENL_ADMIN_PERM,
3931                 .doit = nl80211_addset_beacon,
3932         },
3933         {
3934                 .cmd = NL80211_CMD_NEW_BEACON,
3935                 .policy = nl80211_policy,
3936                 .flags = GENL_ADMIN_PERM,
3937                 .doit = nl80211_addset_beacon,
3938         },
3939         {
3940                 .cmd = NL80211_CMD_DEL_BEACON,
3941                 .policy = nl80211_policy,
3942                 .flags = GENL_ADMIN_PERM,
3943                 .doit = nl80211_del_beacon,
3944         },
3945         {
3946                 .cmd = NL80211_CMD_GET_STATION,
3947                 .doit = nl80211_get_station,
3948                 .dumpit = nl80211_dump_station,
3949                 .policy = nl80211_policy,
3950         },
3951         {
3952                 .cmd = NL80211_CMD_SET_STATION,
3953                 .doit = nl80211_set_station,
3954                 .policy = nl80211_policy,
3955                 .flags = GENL_ADMIN_PERM,
3956         },
3957         {
3958                 .cmd = NL80211_CMD_NEW_STATION,
3959                 .doit = nl80211_new_station,
3960                 .policy = nl80211_policy,
3961                 .flags = GENL_ADMIN_PERM,
3962         },
3963         {
3964                 .cmd = NL80211_CMD_DEL_STATION,
3965                 .doit = nl80211_del_station,
3966                 .policy = nl80211_policy,
3967                 .flags = GENL_ADMIN_PERM,
3968         },
3969         {
3970                 .cmd = NL80211_CMD_GET_MPATH,
3971                 .doit = nl80211_get_mpath,
3972                 .dumpit = nl80211_dump_mpath,
3973                 .policy = nl80211_policy,
3974                 .flags = GENL_ADMIN_PERM,
3975         },
3976         {
3977                 .cmd = NL80211_CMD_SET_MPATH,
3978                 .doit = nl80211_set_mpath,
3979                 .policy = nl80211_policy,
3980                 .flags = GENL_ADMIN_PERM,
3981         },
3982         {
3983                 .cmd = NL80211_CMD_NEW_MPATH,
3984                 .doit = nl80211_new_mpath,
3985                 .policy = nl80211_policy,
3986                 .flags = GENL_ADMIN_PERM,
3987         },
3988         {
3989                 .cmd = NL80211_CMD_DEL_MPATH,
3990                 .doit = nl80211_del_mpath,
3991                 .policy = nl80211_policy,
3992                 .flags = GENL_ADMIN_PERM,
3993         },
3994         {
3995                 .cmd = NL80211_CMD_SET_BSS,
3996                 .doit = nl80211_set_bss,
3997                 .policy = nl80211_policy,
3998                 .flags = GENL_ADMIN_PERM,
3999         },
4000         {
4001                 .cmd = NL80211_CMD_GET_REG,
4002                 .doit = nl80211_get_reg,
4003                 .policy = nl80211_policy,
4004                 /* can be retrieved by unprivileged users */
4005         },
4006         {
4007                 .cmd = NL80211_CMD_SET_REG,
4008                 .doit = nl80211_set_reg,
4009                 .policy = nl80211_policy,
4010                 .flags = GENL_ADMIN_PERM,
4011         },
4012         {
4013                 .cmd = NL80211_CMD_REQ_SET_REG,
4014                 .doit = nl80211_req_set_reg,
4015                 .policy = nl80211_policy,
4016                 .flags = GENL_ADMIN_PERM,
4017         },
4018         {
4019                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
4020                 .doit = nl80211_get_mesh_params,
4021                 .policy = nl80211_policy,
4022                 /* can be retrieved by unprivileged users */
4023         },
4024         {
4025                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
4026                 .doit = nl80211_set_mesh_params,
4027                 .policy = nl80211_policy,
4028                 .flags = GENL_ADMIN_PERM,
4029         },
4030         {
4031                 .cmd = NL80211_CMD_TRIGGER_SCAN,
4032                 .doit = nl80211_trigger_scan,
4033                 .policy = nl80211_policy,
4034                 .flags = GENL_ADMIN_PERM,
4035         },
4036         {
4037                 .cmd = NL80211_CMD_GET_SCAN,
4038                 .policy = nl80211_policy,
4039                 .dumpit = nl80211_dump_scan,
4040         },
4041         {
4042                 .cmd = NL80211_CMD_AUTHENTICATE,
4043                 .doit = nl80211_authenticate,
4044                 .policy = nl80211_policy,
4045                 .flags = GENL_ADMIN_PERM,
4046         },
4047         {
4048                 .cmd = NL80211_CMD_ASSOCIATE,
4049                 .doit = nl80211_associate,
4050                 .policy = nl80211_policy,
4051                 .flags = GENL_ADMIN_PERM,
4052         },
4053         {
4054                 .cmd = NL80211_CMD_DEAUTHENTICATE,
4055                 .doit = nl80211_deauthenticate,
4056                 .policy = nl80211_policy,
4057                 .flags = GENL_ADMIN_PERM,
4058         },
4059         {
4060                 .cmd = NL80211_CMD_DISASSOCIATE,
4061                 .doit = nl80211_disassociate,
4062                 .policy = nl80211_policy,
4063                 .flags = GENL_ADMIN_PERM,
4064         },
4065         {
4066                 .cmd = NL80211_CMD_JOIN_IBSS,
4067                 .doit = nl80211_join_ibss,
4068                 .policy = nl80211_policy,
4069                 .flags = GENL_ADMIN_PERM,
4070         },
4071         {
4072                 .cmd = NL80211_CMD_LEAVE_IBSS,
4073                 .doit = nl80211_leave_ibss,
4074                 .policy = nl80211_policy,
4075                 .flags = GENL_ADMIN_PERM,
4076         },
4077 #ifdef CONFIG_NL80211_TESTMODE
4078         {
4079                 .cmd = NL80211_CMD_TESTMODE,
4080                 .doit = nl80211_testmode_do,
4081                 .policy = nl80211_policy,
4082                 .flags = GENL_ADMIN_PERM,
4083         },
4084 #endif
4085         {
4086                 .cmd = NL80211_CMD_CONNECT,
4087                 .doit = nl80211_connect,
4088                 .policy = nl80211_policy,
4089                 .flags = GENL_ADMIN_PERM,
4090         },
4091         {
4092                 .cmd = NL80211_CMD_DISCONNECT,
4093                 .doit = nl80211_disconnect,
4094                 .policy = nl80211_policy,
4095                 .flags = GENL_ADMIN_PERM,
4096         },
4097 };
4098 static struct genl_multicast_group nl80211_mlme_mcgrp = {
4099         .name = "mlme",
4100 };
4101
4102 /* multicast groups */
4103 static struct genl_multicast_group nl80211_config_mcgrp = {
4104         .name = "config",
4105 };
4106 static struct genl_multicast_group nl80211_scan_mcgrp = {
4107         .name = "scan",
4108 };
4109 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
4110         .name = "regulatory",
4111 };
4112
4113 /* notification functions */
4114
4115 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
4116 {
4117         struct sk_buff *msg;
4118
4119         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4120         if (!msg)
4121                 return;
4122
4123         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
4124                 nlmsg_free(msg);
4125                 return;
4126         }
4127
4128         genlmsg_multicast(msg, 0, nl80211_config_mcgrp.id, GFP_KERNEL);
4129 }
4130
4131 static int nl80211_add_scan_req(struct sk_buff *msg,
4132                                 struct cfg80211_registered_device *rdev)
4133 {
4134         struct cfg80211_scan_request *req = rdev->scan_req;
4135         struct nlattr *nest;
4136         int i;
4137
4138         ASSERT_RDEV_LOCK(rdev);
4139
4140         if (WARN_ON(!req))
4141                 return 0;
4142
4143         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
4144         if (!nest)
4145                 goto nla_put_failure;
4146         for (i = 0; i < req->n_ssids; i++)
4147                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
4148         nla_nest_end(msg, nest);
4149
4150         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
4151         if (!nest)
4152                 goto nla_put_failure;
4153         for (i = 0; i < req->n_channels; i++)
4154                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
4155         nla_nest_end(msg, nest);
4156
4157         if (req->ie)
4158                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
4159
4160         return 0;
4161  nla_put_failure:
4162         return -ENOBUFS;
4163 }
4164
4165 static int nl80211_send_scan_msg(struct sk_buff *msg,
4166                                  struct cfg80211_registered_device *rdev,
4167                                  struct net_device *netdev,
4168                                  u32 pid, u32 seq, int flags,
4169                                  u32 cmd)
4170 {
4171         void *hdr;
4172
4173         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
4174         if (!hdr)
4175                 return -1;
4176
4177         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4178         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4179
4180         /* ignore errors and send incomplete event anyway */
4181         nl80211_add_scan_req(msg, rdev);
4182
4183         return genlmsg_end(msg, hdr);
4184
4185  nla_put_failure:
4186         genlmsg_cancel(msg, hdr);
4187         return -EMSGSIZE;
4188 }
4189
4190 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
4191                              struct net_device *netdev)
4192 {
4193         struct sk_buff *msg;
4194
4195         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4196         if (!msg)
4197                 return;
4198
4199         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4200                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
4201                 nlmsg_free(msg);
4202                 return;
4203         }
4204
4205         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
4206 }
4207
4208 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
4209                             struct net_device *netdev)
4210 {
4211         struct sk_buff *msg;
4212
4213         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4214         if (!msg)
4215                 return;
4216
4217         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4218                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
4219                 nlmsg_free(msg);
4220                 return;
4221         }
4222
4223         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
4224 }
4225
4226 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
4227                                struct net_device *netdev)
4228 {
4229         struct sk_buff *msg;
4230
4231         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4232         if (!msg)
4233                 return;
4234
4235         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
4236                                   NL80211_CMD_SCAN_ABORTED) < 0) {
4237                 nlmsg_free(msg);
4238                 return;
4239         }
4240
4241         genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
4242 }
4243
4244 /*
4245  * This can happen on global regulatory changes or device specific settings
4246  * based on custom world regulatory domains.
4247  */
4248 void nl80211_send_reg_change_event(struct regulatory_request *request)
4249 {
4250         struct sk_buff *msg;
4251         void *hdr;
4252
4253         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4254         if (!msg)
4255                 return;
4256
4257         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
4258         if (!hdr) {
4259                 nlmsg_free(msg);
4260                 return;
4261         }
4262
4263         /* Userspace can always count this one always being set */
4264         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
4265
4266         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
4267                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4268                            NL80211_REGDOM_TYPE_WORLD);
4269         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
4270                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4271                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
4272         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
4273                  request->intersect)
4274                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4275                            NL80211_REGDOM_TYPE_INTERSECTION);
4276         else {
4277                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
4278                            NL80211_REGDOM_TYPE_COUNTRY);
4279                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
4280         }
4281
4282         if (wiphy_idx_valid(request->wiphy_idx))
4283                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
4284
4285         if (genlmsg_end(msg, hdr) < 0) {
4286                 nlmsg_free(msg);
4287                 return;
4288         }
4289
4290         genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_KERNEL);
4291
4292         return;
4293
4294 nla_put_failure:
4295         genlmsg_cancel(msg, hdr);
4296         nlmsg_free(msg);
4297 }
4298
4299 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
4300                                     struct net_device *netdev,
4301                                     const u8 *buf, size_t len,
4302                                     enum nl80211_commands cmd, gfp_t gfp)
4303 {
4304         struct sk_buff *msg;
4305         void *hdr;
4306
4307         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4308         if (!msg)
4309                 return;
4310
4311         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4312         if (!hdr) {
4313                 nlmsg_free(msg);
4314                 return;
4315         }
4316
4317         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4318         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4319         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
4320
4321         if (genlmsg_end(msg, hdr) < 0) {
4322                 nlmsg_free(msg);
4323                 return;
4324         }
4325
4326         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4327         return;
4328
4329  nla_put_failure:
4330         genlmsg_cancel(msg, hdr);
4331         nlmsg_free(msg);
4332 }
4333
4334 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
4335                           struct net_device *netdev, const u8 *buf,
4336                           size_t len, gfp_t gfp)
4337 {
4338         nl80211_send_mlme_event(rdev, netdev, buf, len,
4339                                 NL80211_CMD_AUTHENTICATE, gfp);
4340 }
4341
4342 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
4343                            struct net_device *netdev, const u8 *buf,
4344                            size_t len, gfp_t gfp)
4345 {
4346         nl80211_send_mlme_event(rdev, netdev, buf, len,
4347                                 NL80211_CMD_ASSOCIATE, gfp);
4348 }
4349
4350 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
4351                          struct net_device *netdev, const u8 *buf,
4352                          size_t len, gfp_t gfp)
4353 {
4354         nl80211_send_mlme_event(rdev, netdev, buf, len,
4355                                 NL80211_CMD_DEAUTHENTICATE, gfp);
4356 }
4357
4358 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
4359                            struct net_device *netdev, const u8 *buf,
4360                            size_t len, gfp_t gfp)
4361 {
4362         nl80211_send_mlme_event(rdev, netdev, buf, len,
4363                                 NL80211_CMD_DISASSOCIATE, gfp);
4364 }
4365
4366 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
4367                                       struct net_device *netdev, int cmd,
4368                                       const u8 *addr, gfp_t gfp)
4369 {
4370         struct sk_buff *msg;
4371         void *hdr;
4372
4373         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4374         if (!msg)
4375                 return;
4376
4377         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
4378         if (!hdr) {
4379                 nlmsg_free(msg);
4380                 return;
4381         }
4382
4383         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4384         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4385         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
4386         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4387
4388         if (genlmsg_end(msg, hdr) < 0) {
4389                 nlmsg_free(msg);
4390                 return;
4391         }
4392
4393         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4394         return;
4395
4396  nla_put_failure:
4397         genlmsg_cancel(msg, hdr);
4398         nlmsg_free(msg);
4399 }
4400
4401 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
4402                                struct net_device *netdev, const u8 *addr,
4403                                gfp_t gfp)
4404 {
4405         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
4406                                   addr, gfp);
4407 }
4408
4409 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
4410                                 struct net_device *netdev, const u8 *addr,
4411                                 gfp_t gfp)
4412 {
4413         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
4414                                   addr, gfp);
4415 }
4416
4417 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
4418                                  struct net_device *netdev, const u8 *bssid,
4419                                  const u8 *req_ie, size_t req_ie_len,
4420                                  const u8 *resp_ie, size_t resp_ie_len,
4421                                  u16 status, gfp_t gfp)
4422 {
4423         struct sk_buff *msg;
4424         void *hdr;
4425
4426         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4427         if (!msg)
4428                 return;
4429
4430         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
4431         if (!hdr) {
4432                 nlmsg_free(msg);
4433                 return;
4434         }
4435
4436         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4437         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4438         if (bssid)
4439                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4440         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
4441         if (req_ie)
4442                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4443         if (resp_ie)
4444                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4445
4446         if (genlmsg_end(msg, hdr) < 0) {
4447                 nlmsg_free(msg);
4448                 return;
4449         }
4450
4451         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4452         return;
4453
4454  nla_put_failure:
4455         genlmsg_cancel(msg, hdr);
4456         nlmsg_free(msg);
4457
4458 }
4459
4460 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
4461                          struct net_device *netdev, const u8 *bssid,
4462                          const u8 *req_ie, size_t req_ie_len,
4463                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
4464 {
4465         struct sk_buff *msg;
4466         void *hdr;
4467
4468         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
4469         if (!msg)
4470                 return;
4471
4472         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
4473         if (!hdr) {
4474                 nlmsg_free(msg);
4475                 return;
4476         }
4477
4478         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4479         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4480         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4481         if (req_ie)
4482                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
4483         if (resp_ie)
4484                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
4485
4486         if (genlmsg_end(msg, hdr) < 0) {
4487                 nlmsg_free(msg);
4488                 return;
4489         }
4490
4491         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4492         return;
4493
4494  nla_put_failure:
4495         genlmsg_cancel(msg, hdr);
4496         nlmsg_free(msg);
4497
4498 }
4499
4500 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
4501                                struct net_device *netdev, u16 reason,
4502                                const u8 *ie, size_t ie_len, bool from_ap)
4503 {
4504         struct sk_buff *msg;
4505         void *hdr;
4506
4507         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
4508         if (!msg)
4509                 return;
4510
4511         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
4512         if (!hdr) {
4513                 nlmsg_free(msg);
4514                 return;
4515         }
4516
4517         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4518         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4519         if (from_ap && reason)
4520                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
4521         if (from_ap)
4522                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
4523         if (ie)
4524                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
4525
4526         if (genlmsg_end(msg, hdr) < 0) {
4527                 nlmsg_free(msg);
4528                 return;
4529         }
4530
4531         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, GFP_KERNEL);
4532         return;
4533
4534  nla_put_failure:
4535         genlmsg_cancel(msg, hdr);
4536         nlmsg_free(msg);
4537
4538 }
4539
4540 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
4541                              struct net_device *netdev, const u8 *bssid,
4542                              gfp_t gfp)
4543 {
4544         struct sk_buff *msg;
4545         void *hdr;
4546
4547         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4548         if (!msg)
4549                 return;
4550
4551         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
4552         if (!hdr) {
4553                 nlmsg_free(msg);
4554                 return;
4555         }
4556
4557         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4558         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4559         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
4560
4561         if (genlmsg_end(msg, hdr) < 0) {
4562                 nlmsg_free(msg);
4563                 return;
4564         }
4565
4566         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4567         return;
4568
4569  nla_put_failure:
4570         genlmsg_cancel(msg, hdr);
4571         nlmsg_free(msg);
4572 }
4573
4574 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
4575                                  struct net_device *netdev, const u8 *addr,
4576                                  enum nl80211_key_type key_type, int key_id,
4577                                  const u8 *tsc, gfp_t gfp)
4578 {
4579         struct sk_buff *msg;
4580         void *hdr;
4581
4582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
4583         if (!msg)
4584                 return;
4585
4586         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
4587         if (!hdr) {
4588                 nlmsg_free(msg);
4589                 return;
4590         }
4591
4592         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4593         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
4594         if (addr)
4595                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4596         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
4597         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
4598         if (tsc)
4599                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
4600
4601         if (genlmsg_end(msg, hdr) < 0) {
4602                 nlmsg_free(msg);
4603                 return;
4604         }
4605
4606         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
4607         return;
4608
4609  nla_put_failure:
4610         genlmsg_cancel(msg, hdr);
4611         nlmsg_free(msg);
4612 }
4613
4614 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
4615                                     struct ieee80211_channel *channel_before,
4616                                     struct ieee80211_channel *channel_after)
4617 {
4618         struct sk_buff *msg;
4619         void *hdr;
4620         struct nlattr *nl_freq;
4621
4622         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
4623         if (!msg)
4624                 return;
4625
4626         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
4627         if (!hdr) {
4628                 nlmsg_free(msg);
4629                 return;
4630         }
4631
4632         /*
4633          * Since we are applying the beacon hint to a wiphy we know its
4634          * wiphy_idx is valid
4635          */
4636         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
4637
4638         /* Before */
4639         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
4640         if (!nl_freq)
4641                 goto nla_put_failure;
4642         if (nl80211_msg_put_channel(msg, channel_before))
4643                 goto nla_put_failure;
4644         nla_nest_end(msg, nl_freq);
4645
4646         /* After */
4647         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
4648         if (!nl_freq)
4649                 goto nla_put_failure;
4650         if (nl80211_msg_put_channel(msg, channel_after))
4651                 goto nla_put_failure;
4652         nla_nest_end(msg, nl_freq);
4653
4654         if (genlmsg_end(msg, hdr) < 0) {
4655                 nlmsg_free(msg);
4656                 return;
4657         }
4658
4659         genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
4660
4661         return;
4662
4663 nla_put_failure:
4664         genlmsg_cancel(msg, hdr);
4665         nlmsg_free(msg);
4666 }
4667
4668 /* initialisation/exit functions */
4669
4670 int nl80211_init(void)
4671 {
4672         int err;
4673
4674         err = genl_register_family_with_ops(&nl80211_fam,
4675                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
4676         if (err)
4677                 return err;
4678
4679         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
4680         if (err)
4681                 goto err_out;
4682
4683         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
4684         if (err)
4685                 goto err_out;
4686
4687         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
4688         if (err)
4689                 goto err_out;
4690
4691         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
4692         if (err)
4693                 goto err_out;
4694
4695 #ifdef CONFIG_NL80211_TESTMODE
4696         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
4697         if (err)
4698                 goto err_out;
4699 #endif
4700
4701         return 0;
4702  err_out:
4703         genl_unregister_family(&nl80211_fam);
4704         return err;
4705 }
4706
4707 void nl80211_exit(void)
4708 {
4709         genl_unregister_family(&nl80211_fam);
4710 }