net/wireless/nl80211.c

   1 /*
   2  * This is the new netlink-based wireless configuration interface.
   3  *
   4  * Copyright 2006-2010  Johannes Berg <johannes@sipsolutions.net>
   5  */
   6
   7 #include <linux/if.h>
   8 #include <linux/module.h>
   9 #include <linux/err.h>
  10 #include <linux/slab.h>
  11 #include <linux/list.h>
  12 #include <linux/if_ether.h>
  13 #include <linux/ieee80211.h>
  14 #include <linux/nl80211.h>
  15 #include <linux/rtnetlink.h>
  16 #include <linux/netlink.h>
  17 #include <linux/etherdevice.h>
  18 #include <net/net_namespace.h>
  19 #include <net/genetlink.h>
  20 #include <net/cfg80211.h>
  21 #include <net/sock.h>
  22 #include "core.h"
  23 #include "nl80211.h"
  24 #include "reg.h"
  25
  26 /* the netlink family */
  27 static struct genl_family nl80211_fam = {
  28         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  29         .name = "nl80211",      /* have users key off the name instead */
  30         .hdrsize = 0,           /* no private header */
  31         .version = 1,           /* no particular meaning now */
  32         .maxattr = NL80211_ATTR_MAX,
  33         .netnsok = true,
  34 };
  35
  36 /* internal helper: get rdev and dev */
  37 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  38                                        struct cfg80211_registered_device **rdev,
  39                                        struct net_device **dev)
  40 {
  41         struct nlattr **attrs = info->attrs;
  42         int ifindex;
  43
  44         if (!attrs[NL80211_ATTR_IFINDEX])
  45                 return -EINVAL;
  46
  47         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  48         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  49         if (!*dev)
  50                 return -ENODEV;
  51
  52         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  53         if (IS_ERR(*rdev)) {
  54                 dev_put(*dev);
  55                 return PTR_ERR(*rdev);
  56         }
  57
  58         return 0;
  59 }
  60
  61 /* policy for the attributes */
  62 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  63         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  64         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  65                                       .len = 20-1 },
  66         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  67         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  68         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  69         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  70         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  71         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  72         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  73         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  74
  75         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  77         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  78
  79         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  80         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  81
  82         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  83         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  84                                     .len = WLAN_MAX_KEY_LEN },
  85         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  86         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  87         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  88         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  89
  90         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  91         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  92         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  93                                        .len = IEEE80211_MAX_DATA_LEN },
  94         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  95                                        .len = IEEE80211_MAX_DATA_LEN },
  96         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  97         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  98         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  99         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 100                                                .len = NL80211_MAX_SUPP_RATES },
 101         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 102         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 103         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 104         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 105                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 106         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 107
 108         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 109         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 110
 111         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 112         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 113         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 114         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 115                                            .len = NL80211_MAX_SUPP_RATES },
 116
 117         [NL80211_ATTR_MESH_PARAMS] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 120                                          .len = NL80211_HT_CAPABILITY_LEN },
 121
 122         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 123         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 124                               .len = IEEE80211_MAX_DATA_LEN },
 125         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 126         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 127
 128         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 129                                 .len = IEEE80211_MAX_SSID_LEN },
 130         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 131         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 132         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 133         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 134         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 135         [NL80211_ATTR_STA_FLAGS2] = {
 136                 .len = sizeof(struct nl80211_sta_flag_update),
 137         },
 138         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 139         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 140         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 141         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 142         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 143         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 144         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 145         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 146         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 147                                  .len = WLAN_PMKID_LEN },
 148         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 149         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 150         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 151         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 152                                  .len = IEEE80211_MAX_DATA_LEN },
 153         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 154         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 155         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 156         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 157         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 158
 159         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 160         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 161         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 162 };
 163
 164 /* policy for the attributes */
 165 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 166         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 167         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 168         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 169         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 170         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 171         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 172 };
 173
 174 /* ifidx get helper */
 175 static int nl80211_get_ifidx(struct netlink_callback *cb)
 176 {
 177         int res;
 178
 179         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 180                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 181                           nl80211_policy);
 182         if (res)
 183                 return res;
 184
 185         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 186                 return -EINVAL;
 187
 188         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 189         if (!res)
 190                 return -EINVAL;
 191         return res;
 192 }
 193
 194 /* IE validation */
 195 static bool is_valid_ie_attr(const struct nlattr *attr)
 196 {
 197         const u8 *pos;
 198         int len;
 199
 200         if (!attr)
 201                 return true;
 202
 203         pos = nla_data(attr);
 204         len = nla_len(attr);
 205
 206         while (len) {
 207                 u8 elemlen;
 208
 209                 if (len < 2)
 210                         return false;
 211                 len -= 2;
 212
 213                 elemlen = pos[1];
 214                 if (elemlen > len)
 215                         return false;
 216
 217                 len -= elemlen;
 218                 pos += 2 + elemlen;
 219         }
 220
 221         return true;
 222 }
 223
 224 /* message building helper */
 225 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 226                                    int flags, u8 cmd)
 227 {
 228         /* since there is no private header just add the generic one */
 229         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 230 }
 231
 232 static int nl80211_msg_put_channel(struct sk_buff *msg,
 233                                    struct ieee80211_channel *chan)
 234 {
 235         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 236                     chan->center_freq);
 237
 238         if (chan->flags & IEEE80211_CHAN_DISABLED)
 239                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 240         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 241                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 242         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 243                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 244         if (chan->flags & IEEE80211_CHAN_RADAR)
 245                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 246
 247         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 248                     DBM_TO_MBM(chan->max_power));
 249
 250         return 0;
 251
 252  nla_put_failure:
 253         return -ENOBUFS;
 254 }
 255
 256 /* netlink command implementations */
 257
 258 struct key_parse {
 259         struct key_params p;
 260         int idx;
 261         bool def, defmgmt;
 262 };
 263
 264 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 265 {
 266         struct nlattr *tb[NL80211_KEY_MAX + 1];
 267         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 268                                    nl80211_key_policy);
 269         if (err)
 270                 return err;
 271
 272         k->def = !!tb[NL80211_KEY_DEFAULT];
 273         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 274
 275         if (tb[NL80211_KEY_IDX])
 276                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 277
 278         if (tb[NL80211_KEY_DATA]) {
 279                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 280                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 281         }
 282
 283         if (tb[NL80211_KEY_SEQ]) {
 284                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 285                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 286         }
 287
 288         if (tb[NL80211_KEY_CIPHER])
 289                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 290
 291         return 0;
 292 }
 293
 294 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 295 {
 296         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 297                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 298                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 299         }
 300
 301         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 302                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 303                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 304         }
 305
 306         if (info->attrs[NL80211_ATTR_KEY_IDX])
 307                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 308
 309         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 310                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 311
 312         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 313         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 314
 315         return 0;
 316 }
 317
 318 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 319 {
 320         int err;
 321
 322         memset(k, 0, sizeof(*k));
 323         k->idx = -1;
 324
 325         if (info->attrs[NL80211_ATTR_KEY])
 326                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 327         else
 328                 err = nl80211_parse_key_old(info, k);
 329
 330         if (err)
 331                 return err;
 332
 333         if (k->def && k->defmgmt)
 334                 return -EINVAL;
 335
 336         if (k->idx != -1) {
 337                 if (k->defmgmt) {
 338                         if (k->idx < 4 || k->idx > 5)
 339                                 return -EINVAL;
 340                 } else if (k->def) {
 341                         if (k->idx < 0 || k->idx > 3)
 342                                 return -EINVAL;
 343                 } else {
 344                         if (k->idx < 0 || k->idx > 5)
 345                                 return -EINVAL;
 346                 }
 347         }
 348
 349         return 0;
 350 }
 351
 352 static struct cfg80211_cached_keys *
 353 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 354                        struct nlattr *keys)
 355 {
 356         struct key_parse parse;
 357         struct nlattr *key;
 358         struct cfg80211_cached_keys *result;
 359         int rem, err, def = 0;
 360
 361         result = kzalloc(sizeof(*result), GFP_KERNEL);
 362         if (!result)
 363                 return ERR_PTR(-ENOMEM);
 364
 365         result->def = -1;
 366         result->defmgmt = -1;
 367
 368         nla_for_each_nested(key, keys, rem) {
 369                 memset(&parse, 0, sizeof(parse));
 370                 parse.idx = -1;
 371
 372                 err = nl80211_parse_key_new(key, &parse);
 373                 if (err)
 374                         goto error;
 375                 err = -EINVAL;
 376                 if (!parse.p.key)
 377                         goto error;
 378                 if (parse.idx < 0 || parse.idx > 4)
 379                         goto error;
 380                 if (parse.def) {
 381                         if (def)
 382                                 goto error;
 383                         def = 1;
 384                         result->def = parse.idx;
 385                 } else if (parse.defmgmt)
 386                         goto error;
 387                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 388                                                      parse.idx, NULL);
 389                 if (err)
 390                         goto error;
 391                 result->params[parse.idx].cipher = parse.p.cipher;
 392                 result->params[parse.idx].key_len = parse.p.key_len;
 393                 result->params[parse.idx].key = result->data[parse.idx];
 394                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 395         }
 396
 397         return result;
 398  error:
 399         kfree(result);
 400         return ERR_PTR(err);
 401 }
 402
 403 static int nl80211_key_allowed(struct wireless_dev *wdev)
 404 {
 405         ASSERT_WDEV_LOCK(wdev);
 406
 407         if (!netif_running(wdev->netdev))
 408                 return -ENETDOWN;
 409
 410         switch (wdev->iftype) {
 411         case NL80211_IFTYPE_AP:
 412         case NL80211_IFTYPE_AP_VLAN:
 413         case NL80211_IFTYPE_P2P_GO:
 414                 break;
 415         case NL80211_IFTYPE_ADHOC:
 416                 if (!wdev->current_bss)
 417                         return -ENOLINK;
 418                 break;
 419         case NL80211_IFTYPE_STATION:
 420         case NL80211_IFTYPE_P2P_CLIENT:
 421                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 422                         return -ENOLINK;
 423                 break;
 424         default:
 425                 return -EINVAL;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 432                               struct cfg80211_registered_device *dev)
 433 {
 434         void *hdr;
 435         struct nlattr *nl_bands, *nl_band;
 436         struct nlattr *nl_freqs, *nl_freq;
 437         struct nlattr *nl_rates, *nl_rate;
 438         struct nlattr *nl_modes;
 439         struct nlattr *nl_cmds;
 440         enum ieee80211_band band;
 441         struct ieee80211_channel *chan;
 442         struct ieee80211_rate *rate;
 443         int i;
 444         u16 ifmodes = dev->wiphy.interface_modes;
 445         const struct ieee80211_txrx_stypes *mgmt_stypes =
 446                                 dev->wiphy.mgmt_stypes;
 447
 448         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 449         if (!hdr)
 450                 return -1;
 451
 452         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 453         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 454
 455         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 456                     cfg80211_rdev_list_generation);
 457
 458         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 459                    dev->wiphy.retry_short);
 460         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 461                    dev->wiphy.retry_long);
 462         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 463                     dev->wiphy.frag_threshold);
 464         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 465                     dev->wiphy.rts_threshold);
 466         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 467                     dev->wiphy.coverage_class);
 468
 469         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 470                    dev->wiphy.max_scan_ssids);
 471         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 472                     dev->wiphy.max_scan_ie_len);
 473
 474         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 475                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 476                 dev->wiphy.cipher_suites);
 477
 478         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 479                    dev->wiphy.max_num_pmkids);
 480
 481         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 482                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 483
 484         nl_modes = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_IFTYPES);
 485         if (!nl_modes)
 486                 goto nla_put_failure;
 487
 488         i = 0;
 489         while (ifmodes) {
 490                 if (ifmodes & 1)
 491                         NLA_PUT_FLAG(msg, i);
 492                 ifmodes >>= 1;
 493                 i++;
 494         }
 495
 496         nla_nest_end(msg, nl_modes);
 497
 498         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 499         if (!nl_bands)
 500                 goto nla_put_failure;
 501
 502         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 503                 if (!dev->wiphy.bands[band])
 504                         continue;
 505
 506                 nl_band = nla_nest_start(msg, band);
 507                 if (!nl_band)
 508                         goto nla_put_failure;
 509
 510                 /* add HT info */
 511                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 512                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 513                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 514                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 515                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 516                                 dev->wiphy.bands[band]->ht_cap.cap);
 517                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 518                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 519                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 520                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 521                 }
 522
 523                 /* add frequencies */
 524                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 525                 if (!nl_freqs)
 526                         goto nla_put_failure;
 527
 528                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 529                         nl_freq = nla_nest_start(msg, i);
 530                         if (!nl_freq)
 531                                 goto nla_put_failure;
 532
 533                         chan = &dev->wiphy.bands[band]->channels[i];
 534
 535                         if (nl80211_msg_put_channel(msg, chan))
 536                                 goto nla_put_failure;
 537
 538                         nla_nest_end(msg, nl_freq);
 539                 }
 540
 541                 nla_nest_end(msg, nl_freqs);
 542
 543                 /* add bitrates */
 544                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 545                 if (!nl_rates)
 546                         goto nla_put_failure;
 547
 548                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 549                         nl_rate = nla_nest_start(msg, i);
 550                         if (!nl_rate)
 551                                 goto nla_put_failure;
 552
 553                         rate = &dev->wiphy.bands[band]->bitrates[i];
 554                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 555                                     rate->bitrate);
 556                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 557                                 NLA_PUT_FLAG(msg,
 558                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 559
 560                         nla_nest_end(msg, nl_rate);
 561                 }
 562
 563                 nla_nest_end(msg, nl_rates);
 564
 565                 nla_nest_end(msg, nl_band);
 566         }
 567         nla_nest_end(msg, nl_bands);
 568
 569         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 570         if (!nl_cmds)
 571                 goto nla_put_failure;
 572
 573         i = 0;
 574 #define CMD(op, n)                                              \
 575          do {                                                   \
 576                 if (dev->ops->op) {                             \
 577                         i++;                                    \
 578                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 579                 }                                               \
 580         } while (0)
 581
 582         CMD(add_virtual_intf, NEW_INTERFACE);
 583         CMD(change_virtual_intf, SET_INTERFACE);
 584         CMD(add_key, NEW_KEY);
 585         CMD(add_beacon, NEW_BEACON);
 586         CMD(add_station, NEW_STATION);
 587         CMD(add_mpath, NEW_MPATH);
 588         CMD(set_mesh_params, SET_MESH_PARAMS);
 589         CMD(change_bss, SET_BSS);
 590         CMD(auth, AUTHENTICATE);
 591         CMD(assoc, ASSOCIATE);
 592         CMD(deauth, DEAUTHENTICATE);
 593         CMD(disassoc, DISASSOCIATE);
 594         CMD(join_ibss, JOIN_IBSS);
 595         CMD(set_pmksa, SET_PMKSA);
 596         CMD(del_pmksa, DEL_PMKSA);
 597         CMD(flush_pmksa, FLUSH_PMKSA);
 598         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 599         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 600         CMD(mgmt_tx, FRAME);
 601         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 602                 i++;
 603                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 604         }
 605         CMD(set_channel, SET_CHANNEL);
 606
 607 #undef CMD
 608
 609         if (dev->ops->connect || dev->ops->auth) {
 610                 i++;
 611                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 612         }
 613
 614         if (dev->ops->disconnect || dev->ops->deauth) {
 615                 i++;
 616                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 617         }
 618
 619         nla_nest_end(msg, nl_cmds);
 620
 621         if (mgmt_stypes) {
 622                 u16 stypes;
 623                 struct nlattr *nl_ftypes, *nl_ifs;
 624                 enum nl80211_iftype ift;
 625
 626                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 627                 if (!nl_ifs)
 628                         goto nla_put_failure;
 629
 630                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 631                         nl_ftypes = nla_nest_start(msg, ift);
 632                         if (!nl_ftypes)
 633                                 goto nla_put_failure;
 634                         i = 0;
 635                         stypes = mgmt_stypes[ift].tx;
 636                         while (stypes) {
 637                                 if (stypes & 1)
 638                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 639                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 640                                 stypes >>= 1;
 641                                 i++;
 642                         }
 643                         nla_nest_end(msg, nl_ftypes);
 644                 }
 645
 646                 nla_nest_end(msg, nl_ifs);
 647
 648                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 649                 if (!nl_ifs)
 650                         goto nla_put_failure;
 651
 652                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 653                         nl_ftypes = nla_nest_start(msg, ift);
 654                         if (!nl_ftypes)
 655                                 goto nla_put_failure;
 656                         i = 0;
 657                         stypes = mgmt_stypes[ift].rx;
 658                         while (stypes) {
 659                                 if (stypes & 1)
 660                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 661                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 662                                 stypes >>= 1;
 663                                 i++;
 664                         }
 665                         nla_nest_end(msg, nl_ftypes);
 666                 }
 667                 nla_nest_end(msg, nl_ifs);
 668         }
 669
 670         return genlmsg_end(msg, hdr);
 671
 672  nla_put_failure:
 673         genlmsg_cancel(msg, hdr);
 674         return -EMSGSIZE;
 675 }
 676
 677 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 678 {
 679         int idx = 0;
 680         int start = cb->args[0];
 681         struct cfg80211_registered_device *dev;
 682
 683         mutex_lock(&cfg80211_mutex);
 684         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 685                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 686                         continue;
 687                 if (++idx <= start)
 688                         continue;
 689                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 690                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 691                                        dev) < 0) {
 692                         idx--;
 693                         break;
 694                 }
 695         }
 696         mutex_unlock(&cfg80211_mutex);
 697
 698         cb->args[0] = idx;
 699
 700         return skb->len;
 701 }
 702
 703 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 704 {
 705         struct sk_buff *msg;
 706         struct cfg80211_registered_device *dev;
 707
 708         dev = cfg80211_get_dev_from_info(info);
 709         if (IS_ERR(dev))
 710                 return PTR_ERR(dev);
 711
 712         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 713         if (!msg)
 714                 goto out_err;
 715
 716         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0)
 717                 goto out_free;
 718
 719         cfg80211_unlock_rdev(dev);
 720
 721         return genlmsg_reply(msg, info);
 722
 723  out_free:
 724         nlmsg_free(msg);
 725  out_err:
 726         cfg80211_unlock_rdev(dev);
 727         return -ENOBUFS;
 728 }
 729
 730 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 731         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 732         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 733         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 734         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
 735         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
 736 };
 737
 738 static int parse_txq_params(struct nlattr *tb[],
 739                             struct ieee80211_txq_params *txq_params)
 740 {
 741         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
 742             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
 743             !tb[NL80211_TXQ_ATTR_AIFS])
 744                 return -EINVAL;
 745
 746         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
 747         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
 748         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
 749         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
 750         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
 751
 752         return 0;
 753 }
 754
 755 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
 756 {
 757         /*
 758          * You can only set the channel explicitly for AP, mesh
 759          * and WDS type interfaces; all others have their channel
 760          * managed via their respective "establish a connection"
 761          * command (connect, join, ...)
 762          *
 763          * Monitors are special as they are normally slaved to
 764          * whatever else is going on, so they behave as though
 765          * you tried setting the wiphy channel itself.
 766          */
 767         return !wdev ||
 768                 wdev->iftype == NL80211_IFTYPE_AP ||
 769                 wdev->iftype == NL80211_IFTYPE_WDS ||
 770                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
 771                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
 772                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
 773 }
 774
 775 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
 776                                  struct wireless_dev *wdev,
 777                                  struct genl_info *info)
 778 {
 779         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
 780         u32 freq;
 781         int result;
 782
 783         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
 784                 return -EINVAL;
 785
 786         if (!nl80211_can_set_dev_channel(wdev))
 787                 return -EOPNOTSUPP;
 788
 789         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
 790                 channel_type = nla_get_u32(info->attrs[
 791                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 792                 if (channel_type != NL80211_CHAN_NO_HT &&
 793                     channel_type != NL80211_CHAN_HT20 &&
 794                     channel_type != NL80211_CHAN_HT40PLUS &&
 795                     channel_type != NL80211_CHAN_HT40MINUS)
 796                         return -EINVAL;
 797         }
 798
 799         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 800
 801         mutex_lock(&rdev->devlist_mtx);
 802         if (wdev) {
 803                 wdev_lock(wdev);
 804                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
 805                 wdev_unlock(wdev);
 806         } else {
 807                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
 808         }
 809         mutex_unlock(&rdev->devlist_mtx);
 810
 811         return result;
 812 }
 813
 814 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
 815 {
 816         struct cfg80211_registered_device *rdev;
 817         struct net_device *netdev;
 818         int result;
 819
 820         rtnl_lock();
 821
 822         result = get_rdev_dev_by_info_ifindex(info, &rdev, &netdev);
 823         if (result)
 824                 goto unlock_rtnl;
 825
 826         result = __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
 827
 828         dev_put(netdev);
 829         cfg80211_unlock_rdev(rdev);
 830  unlock_rtnl:
 831         rtnl_unlock();
 832
 833         return result;
 834 }
 835
 836 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
 837 {
 838         struct cfg80211_registered_device *rdev;
 839         struct net_device *netdev = NULL;
 840         struct wireless_dev *wdev;
 841         int result = 0, rem_txq_params = 0;
 842         struct nlattr *nl_txq_params;
 843         u32 changed;
 844         u8 retry_short = 0, retry_long = 0;
 845         u32 frag_threshold = 0, rts_threshold = 0;
 846         u8 coverage_class = 0;
 847
 848         rtnl_lock();
 849
 850         /*
 851          * Try to find the wiphy and netdev. Normally this
 852          * function shouldn't need the netdev, but this is
 853          * done for backward compatibility -- previously
 854          * setting the channel was done per wiphy, but now
 855          * it is per netdev. Previous userland like hostapd
 856          * also passed a netdev to set_wiphy, so that it is
 857          * possible to let that go to the right netdev!
 858          */
 859         mutex_lock(&cfg80211_mutex);
 860
 861         if (info->attrs[NL80211_ATTR_IFINDEX]) {
 862                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
 863
 864                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
 865                 if (netdev && netdev->ieee80211_ptr) {
 866                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
 867                         mutex_lock(&rdev->mtx);
 868                 } else
 869                         netdev = NULL;
 870         }
 871
 872         if (!netdev) {
 873                 rdev = __cfg80211_rdev_from_info(info);
 874                 if (IS_ERR(rdev)) {
 875                         mutex_unlock(&cfg80211_mutex);
 876                         result = PTR_ERR(rdev);
 877                         goto unlock;
 878                 }
 879                 wdev = NULL;
 880                 netdev = NULL;
 881                 result = 0;
 882
 883                 mutex_lock(&rdev->mtx);
 884         } else if (netif_running(netdev) &&
 885                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
 886                 wdev = netdev->ieee80211_ptr;
 887         else
 888                 wdev = NULL;
 889
 890         /*
 891          * end workaround code, by now the rdev is available
 892          * and locked, and wdev may or may not be NULL.
 893          */
 894
 895         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
 896                 result = cfg80211_dev_rename(
 897                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
 898
 899         mutex_unlock(&cfg80211_mutex);
 900
 901         if (result)
 902                 goto bad_res;
 903
 904         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
 905                 struct ieee80211_txq_params txq_params;
 906                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
 907
 908                 if (!rdev->ops->set_txq_params) {
 909                         result = -EOPNOTSUPP;
 910                         goto bad_res;
 911                 }
 912
 913                 nla_for_each_nested(nl_txq_params,
 914                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
 915                                     rem_txq_params) {
 916                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
 917                                   nla_data(nl_txq_params),
 918                                   nla_len(nl_txq_params),
 919                                   txq_params_policy);
 920                         result = parse_txq_params(tb, &txq_params);
 921                         if (result)
 922                                 goto bad_res;
 923
 924                         result = rdev->ops->set_txq_params(&rdev->wiphy,
 925                                                            &txq_params);
 926                         if (result)
 927                                 goto bad_res;
 928                 }
 929         }
 930
 931         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 932                 result = __nl80211_set_channel(rdev, wdev, info);
 933                 if (result)
 934                         goto bad_res;
 935         }
 936
 937         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
 938                 enum nl80211_tx_power_setting type;
 939                 int idx, mbm = 0;
 940
 941                 if (!rdev->ops->set_tx_power) {
 942                         result = -EOPNOTSUPP;
 943                         goto bad_res;
 944                 }
 945
 946                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
 947                 type = nla_get_u32(info->attrs[idx]);
 948
 949                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
 950                     (type != NL80211_TX_POWER_AUTOMATIC)) {
 951                         result = -EINVAL;
 952                         goto bad_res;
 953                 }
 954
 955                 if (type != NL80211_TX_POWER_AUTOMATIC) {
 956                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
 957                         mbm = nla_get_u32(info->attrs[idx]);
 958                 }
 959
 960                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
 961                 if (result)
 962                         goto bad_res;
 963         }
 964
 965         changed = 0;
 966
 967         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
 968                 retry_short = nla_get_u8(
 969                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
 970                 if (retry_short == 0) {
 971                         result = -EINVAL;
 972                         goto bad_res;
 973                 }
 974                 changed |= WIPHY_PARAM_RETRY_SHORT;
 975         }
 976
 977         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
 978                 retry_long = nla_get_u8(
 979                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
 980                 if (retry_long == 0) {
 981                         result = -EINVAL;
 982                         goto bad_res;
 983                 }
 984                 changed |= WIPHY_PARAM_RETRY_LONG;
 985         }
 986
 987         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
 988                 frag_threshold = nla_get_u32(
 989                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
 990                 if (frag_threshold < 256) {
 991                         result = -EINVAL;
 992                         goto bad_res;
 993                 }
 994                 if (frag_threshold != (u32) -1) {
 995                         /*
 996                          * Fragments (apart from the last one) are required to
 997                          * have even length. Make the fragmentation code
 998                          * simpler by stripping LSB should someone try to use
 999                          * odd threshold value.
1000                          */
1001                         frag_threshold &= ~0x1;
1002                 }
1003                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1004         }
1005
1006         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1007                 rts_threshold = nla_get_u32(
1008                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1009                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1010         }
1011
1012         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1013                 coverage_class = nla_get_u8(
1014                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1015                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1016         }
1017
1018         if (changed) {
1019                 u8 old_retry_short, old_retry_long;
1020                 u32 old_frag_threshold, old_rts_threshold;
1021                 u8 old_coverage_class;
1022
1023                 if (!rdev->ops->set_wiphy_params) {
1024                         result = -EOPNOTSUPP;
1025                         goto bad_res;
1026                 }
1027
1028                 old_retry_short = rdev->wiphy.retry_short;
1029                 old_retry_long = rdev->wiphy.retry_long;
1030                 old_frag_threshold = rdev->wiphy.frag_threshold;
1031                 old_rts_threshold = rdev->wiphy.rts_threshold;
1032                 old_coverage_class = rdev->wiphy.coverage_class;
1033
1034                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1035                         rdev->wiphy.retry_short = retry_short;
1036                 if (changed & WIPHY_PARAM_RETRY_LONG)
1037                         rdev->wiphy.retry_long = retry_long;
1038                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1039                         rdev->wiphy.frag_threshold = frag_threshold;
1040                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1041                         rdev->wiphy.rts_threshold = rts_threshold;
1042                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1043                         rdev->wiphy.coverage_class = coverage_class;
1044
1045                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1046                 if (result) {
1047                         rdev->wiphy.retry_short = old_retry_short;
1048                         rdev->wiphy.retry_long = old_retry_long;
1049                         rdev->wiphy.frag_threshold = old_frag_threshold;
1050                         rdev->wiphy.rts_threshold = old_rts_threshold;
1051                         rdev->wiphy.coverage_class = old_coverage_class;
1052                 }
1053         }
1054
1055  bad_res:
1056         mutex_unlock(&rdev->mtx);
1057         if (netdev)
1058                 dev_put(netdev);
1059  unlock:
1060         rtnl_unlock();
1061         return result;
1062 }
1063
1064
1065 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1066                               struct cfg80211_registered_device *rdev,
1067                               struct net_device *dev)
1068 {
1069         void *hdr;
1070
1071         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1072         if (!hdr)
1073                 return -1;
1074
1075         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1076         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1077         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1078         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1079
1080         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1081                     rdev->devlist_generation ^
1082                         (cfg80211_rdev_list_generation << 2));
1083
1084         return genlmsg_end(msg, hdr);
1085
1086  nla_put_failure:
1087         genlmsg_cancel(msg, hdr);
1088         return -EMSGSIZE;
1089 }
1090
1091 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1092 {
1093         int wp_idx = 0;
1094         int if_idx = 0;
1095         int wp_start = cb->args[0];
1096         int if_start = cb->args[1];
1097         struct cfg80211_registered_device *rdev;
1098         struct wireless_dev *wdev;
1099
1100         mutex_lock(&cfg80211_mutex);
1101         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1102                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1103                         continue;
1104                 if (wp_idx < wp_start) {
1105                         wp_idx++;
1106                         continue;
1107                 }
1108                 if_idx = 0;
1109
1110                 mutex_lock(&rdev->devlist_mtx);
1111                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1112                         if (if_idx < if_start) {
1113                                 if_idx++;
1114                                 continue;
1115                         }
1116                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1117                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1118                                                rdev, wdev->netdev) < 0) {
1119                                 mutex_unlock(&rdev->devlist_mtx);
1120                                 goto out;
1121                         }
1122                         if_idx++;
1123                 }
1124                 mutex_unlock(&rdev->devlist_mtx);
1125
1126                 wp_idx++;
1127         }
1128  out:
1129         mutex_unlock(&cfg80211_mutex);
1130
1131         cb->args[0] = wp_idx;
1132         cb->args[1] = if_idx;
1133
1134         return skb->len;
1135 }
1136
1137 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1138 {
1139         struct sk_buff *msg;
1140         struct cfg80211_registered_device *dev;
1141         struct net_device *netdev;
1142         int err;
1143
1144         err = get_rdev_dev_by_info_ifindex(info, &dev, &netdev);
1145         if (err)
1146                 return err;
1147
1148         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1149         if (!msg)
1150                 goto out_err;
1151
1152         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1153                                dev, netdev) < 0)
1154                 goto out_free;
1155
1156         dev_put(netdev);
1157         cfg80211_unlock_rdev(dev);
1158
1159         return genlmsg_reply(msg, info);
1160
1161  out_free:
1162         nlmsg_free(msg);
1163  out_err:
1164         dev_put(netdev);
1165         cfg80211_unlock_rdev(dev);
1166         return -ENOBUFS;
1167 }
1168
1169 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1170         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1171         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1172         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1173         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1174         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1175 };
1176
1177 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1178 {
1179         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1180         int flag;
1181
1182         *mntrflags = 0;
1183
1184         if (!nla)
1185                 return -EINVAL;
1186
1187         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1188                              nla, mntr_flags_policy))
1189                 return -EINVAL;
1190
1191         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1192                 if (flags[flag])
1193                         *mntrflags |= (1<<flag);
1194
1195         return 0;
1196 }
1197
1198 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1199                                struct net_device *netdev, u8 use_4addr,
1200                                enum nl80211_iftype iftype)
1201 {
1202         if (!use_4addr) {
1203                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1204                         return -EBUSY;
1205                 return 0;
1206         }
1207
1208         switch (iftype) {
1209         case NL80211_IFTYPE_AP_VLAN:
1210                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1211                         return 0;
1212                 break;
1213         case NL80211_IFTYPE_STATION:
1214                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1215                         return 0;
1216                 break;
1217         default:
1218                 break;
1219         }
1220
1221         return -EOPNOTSUPP;
1222 }
1223
1224 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1225 {
1226         struct cfg80211_registered_device *rdev;
1227         struct vif_params params;
1228         int err;
1229         enum nl80211_iftype otype, ntype;
1230         struct net_device *dev;
1231         u32 _flags, *flags = NULL;
1232         bool change = false;
1233
1234         memset(&params, 0, sizeof(params));
1235
1236         rtnl_lock();
1237
1238         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1239         if (err)
1240                 goto unlock_rtnl;
1241
1242         otype = ntype = dev->ieee80211_ptr->iftype;
1243
1244         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1245                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1246                 if (otype != ntype)
1247                         change = true;
1248                 if (ntype > NL80211_IFTYPE_MAX) {
1249                         err = -EINVAL;
1250                         goto unlock;
1251                 }
1252         }
1253
1254         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1255                 if (ntype != NL80211_IFTYPE_MESH_POINT) {
1256                         err = -EINVAL;
1257                         goto unlock;
1258                 }
1259                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1260                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1261                 change = true;
1262         }
1263
1264         if (info->attrs[NL80211_ATTR_4ADDR]) {
1265                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1266                 change = true;
1267                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1268                 if (err)
1269                         goto unlock;
1270         } else {
1271                 params.use_4addr = -1;
1272         }
1273
1274         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1275                 if (ntype != NL80211_IFTYPE_MONITOR) {
1276                         err = -EINVAL;
1277                         goto unlock;
1278                 }
1279                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1280                                           &_flags);
1281                 if (err)
1282                         goto unlock;
1283
1284                 flags = &_flags;
1285                 change = true;
1286         }
1287
1288         if (change)
1289                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1290         else
1291                 err = 0;
1292
1293         if (!err && params.use_4addr != -1)
1294                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1295
1296  unlock:
1297         dev_put(dev);
1298         cfg80211_unlock_rdev(rdev);
1299  unlock_rtnl:
1300         rtnl_unlock();
1301         return err;
1302 }
1303
1304 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1305 {
1306         struct cfg80211_registered_device *rdev;
1307         struct vif_params params;
1308         int err;
1309         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1310         u32 flags;
1311
1312         memset(&params, 0, sizeof(params));
1313
1314         if (!info->attrs[NL80211_ATTR_IFNAME])
1315                 return -EINVAL;
1316
1317         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1318                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1319                 if (type > NL80211_IFTYPE_MAX)
1320                         return -EINVAL;
1321         }
1322
1323         rtnl_lock();
1324
1325         rdev = cfg80211_get_dev_from_info(info);
1326         if (IS_ERR(rdev)) {
1327                 err = PTR_ERR(rdev);
1328                 goto unlock_rtnl;
1329         }
1330
1331         if (!rdev->ops->add_virtual_intf ||
1332             !(rdev->wiphy.interface_modes & (1 << type))) {
1333                 err = -EOPNOTSUPP;
1334                 goto unlock;
1335         }
1336
1337         if (type == NL80211_IFTYPE_MESH_POINT &&
1338             info->attrs[NL80211_ATTR_MESH_ID]) {
1339                 params.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
1340                 params.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1341         }
1342
1343         if (info->attrs[NL80211_ATTR_4ADDR]) {
1344                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1345                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1346                 if (err)
1347                         goto unlock;
1348         }
1349
1350         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1351                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1352                                   &flags);
1353         err = rdev->ops->add_virtual_intf(&rdev->wiphy,
1354                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1355                 type, err ? NULL : &flags, &params);
1356
1357  unlock:
1358         cfg80211_unlock_rdev(rdev);
1359  unlock_rtnl:
1360         rtnl_unlock();
1361         return err;
1362 }
1363
1364 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1365 {
1366         struct cfg80211_registered_device *rdev;
1367         int err;
1368         struct net_device *dev;
1369
1370         rtnl_lock();
1371
1372         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1373         if (err)
1374                 goto unlock_rtnl;
1375
1376         if (!rdev->ops->del_virtual_intf) {
1377                 err = -EOPNOTSUPP;
1378                 goto out;
1379         }
1380
1381         err = rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1382
1383  out:
1384         cfg80211_unlock_rdev(rdev);
1385         dev_put(dev);
1386  unlock_rtnl:
1387         rtnl_unlock();
1388         return err;
1389 }
1390
1391 struct get_key_cookie {
1392         struct sk_buff *msg;
1393         int error;
1394         int idx;
1395 };
1396
1397 static void get_key_callback(void *c, struct key_params *params)
1398 {
1399         struct nlattr *key;
1400         struct get_key_cookie *cookie = c;
1401
1402         if (params->key)
1403                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1404                         params->key_len, params->key);
1405
1406         if (params->seq)
1407                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1408                         params->seq_len, params->seq);
1409
1410         if (params->cipher)
1411                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1412                             params->cipher);
1413
1414         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1415         if (!key)
1416                 goto nla_put_failure;
1417
1418         if (params->key)
1419                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1420                         params->key_len, params->key);
1421
1422         if (params->seq)
1423                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1424                         params->seq_len, params->seq);
1425
1426         if (params->cipher)
1427                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1428                             params->cipher);
1429
1430         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1431
1432         nla_nest_end(cookie->msg, key);
1433
1434         return;
1435  nla_put_failure:
1436         cookie->error = 1;
1437 }
1438
1439 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1440 {
1441         struct cfg80211_registered_device *rdev;
1442         int err;
1443         struct net_device *dev;
1444         u8 key_idx = 0;
1445         u8 *mac_addr = NULL;
1446         struct get_key_cookie cookie = {
1447                 .error = 0,
1448         };
1449         void *hdr;
1450         struct sk_buff *msg;
1451
1452         if (info->attrs[NL80211_ATTR_KEY_IDX])
1453                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1454
1455         if (key_idx > 5)
1456                 return -EINVAL;
1457
1458         if (info->attrs[NL80211_ATTR_MAC])
1459                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1460
1461         rtnl_lock();
1462
1463         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1464         if (err)
1465                 goto unlock_rtnl;
1466
1467         if (!rdev->ops->get_key) {
1468                 err = -EOPNOTSUPP;
1469                 goto out;
1470         }
1471
1472         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1473         if (!msg) {
1474                 err = -ENOMEM;
1475                 goto out;
1476         }
1477
1478         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1479                              NL80211_CMD_NEW_KEY);
1480
1481         if (IS_ERR(hdr)) {
1482                 err = PTR_ERR(hdr);
1483                 goto free_msg;
1484         }
1485
1486         cookie.msg = msg;
1487         cookie.idx = key_idx;
1488
1489         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1490         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1491         if (mac_addr)
1492                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1493
1494         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, mac_addr,
1495                                 &cookie, get_key_callback);
1496
1497         if (err)
1498                 goto free_msg;
1499
1500         if (cookie.error)
1501                 goto nla_put_failure;
1502
1503         genlmsg_end(msg, hdr);
1504         err = genlmsg_reply(msg, info);
1505         goto out;
1506
1507  nla_put_failure:
1508         err = -ENOBUFS;
1509  free_msg:
1510         nlmsg_free(msg);
1511  out:
1512         cfg80211_unlock_rdev(rdev);
1513         dev_put(dev);
1514  unlock_rtnl:
1515         rtnl_unlock();
1516
1517         return err;
1518 }
1519
1520 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1521 {
1522         struct cfg80211_registered_device *rdev;
1523         struct key_parse key;
1524         int err;
1525         struct net_device *dev;
1526         int (*func)(struct wiphy *wiphy, struct net_device *netdev,
1527                     u8 key_index);
1528
1529         err = nl80211_parse_key(info, &key);
1530         if (err)
1531                 return err;
1532
1533         if (key.idx < 0)
1534                 return -EINVAL;
1535
1536         /* only support setting default key */
1537         if (!key.def && !key.defmgmt)
1538                 return -EINVAL;
1539
1540         rtnl_lock();
1541
1542         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1543         if (err)
1544                 goto unlock_rtnl;
1545
1546         if (key.def)
1547                 func = rdev->ops->set_default_key;
1548         else
1549                 func = rdev->ops->set_default_mgmt_key;
1550
1551         if (!func) {
1552                 err = -EOPNOTSUPP;
1553                 goto out;
1554         }
1555
1556         wdev_lock(dev->ieee80211_ptr);
1557         err = nl80211_key_allowed(dev->ieee80211_ptr);
1558         if (!err)
1559                 err = func(&rdev->wiphy, dev, key.idx);
1560
1561 #ifdef CONFIG_CFG80211_WEXT
1562         if (!err) {
1563                 if (func == rdev->ops->set_default_key)
1564                         dev->ieee80211_ptr->wext.default_key = key.idx;
1565                 else
1566                         dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1567         }
1568 #endif
1569         wdev_unlock(dev->ieee80211_ptr);
1570
1571  out:
1572         cfg80211_unlock_rdev(rdev);
1573         dev_put(dev);
1574
1575  unlock_rtnl:
1576         rtnl_unlock();
1577
1578         return err;
1579 }
1580
1581 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1582 {
1583         struct cfg80211_registered_device *rdev;
1584         int err;
1585         struct net_device *dev;
1586         struct key_parse key;
1587         u8 *mac_addr = NULL;
1588
1589         err = nl80211_parse_key(info, &key);
1590         if (err)
1591                 return err;
1592
1593         if (!key.p.key)
1594                 return -EINVAL;
1595
1596         if (info->attrs[NL80211_ATTR_MAC])
1597                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1598
1599         rtnl_lock();
1600
1601         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1602         if (err)
1603                 goto unlock_rtnl;
1604
1605         if (!rdev->ops->add_key) {
1606                 err = -EOPNOTSUPP;
1607                 goto out;
1608         }
1609
1610         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, mac_addr)) {
1611                 err = -EINVAL;
1612                 goto out;
1613         }
1614
1615         wdev_lock(dev->ieee80211_ptr);
1616         err = nl80211_key_allowed(dev->ieee80211_ptr);
1617         if (!err)
1618                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1619                                          mac_addr, &key.p);
1620         wdev_unlock(dev->ieee80211_ptr);
1621
1622  out:
1623         cfg80211_unlock_rdev(rdev);
1624         dev_put(dev);
1625  unlock_rtnl:
1626         rtnl_unlock();
1627
1628         return err;
1629 }
1630
1631 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1632 {
1633         struct cfg80211_registered_device *rdev;
1634         int err;
1635         struct net_device *dev;
1636         u8 *mac_addr = NULL;
1637         struct key_parse key;
1638
1639         err = nl80211_parse_key(info, &key);
1640         if (err)
1641                 return err;
1642
1643         if (info->attrs[NL80211_ATTR_MAC])
1644                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1645
1646         rtnl_lock();
1647
1648         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1649         if (err)
1650                 goto unlock_rtnl;
1651
1652         if (!rdev->ops->del_key) {
1653                 err = -EOPNOTSUPP;
1654                 goto out;
1655         }
1656
1657         wdev_lock(dev->ieee80211_ptr);
1658         err = nl80211_key_allowed(dev->ieee80211_ptr);
1659         if (!err)
1660                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx, mac_addr);
1661
1662 #ifdef CONFIG_CFG80211_WEXT
1663         if (!err) {
1664                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1665                         dev->ieee80211_ptr->wext.default_key = -1;
1666                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1667                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1668         }
1669 #endif
1670         wdev_unlock(dev->ieee80211_ptr);
1671
1672  out:
1673         cfg80211_unlock_rdev(rdev);
1674         dev_put(dev);
1675
1676  unlock_rtnl:
1677         rtnl_unlock();
1678
1679         return err;
1680 }
1681
1682 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1683 {
1684         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1685                     struct beacon_parameters *info);
1686         struct cfg80211_registered_device *rdev;
1687         int err;
1688         struct net_device *dev;
1689         struct beacon_parameters params;
1690         int haveinfo = 0;
1691
1692         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1693                 return -EINVAL;
1694
1695         rtnl_lock();
1696
1697         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1698         if (err)
1699                 goto unlock_rtnl;
1700
1701         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1702             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1703                 err = -EOPNOTSUPP;
1704                 goto out;
1705         }
1706
1707         switch (info->genlhdr->cmd) {
1708         case NL80211_CMD_NEW_BEACON:
1709                 /* these are required for NEW_BEACON */
1710                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1711                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1712                     !info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1713                         err = -EINVAL;
1714                         goto out;
1715                 }
1716
1717                 call = rdev->ops->add_beacon;
1718                 break;
1719         case NL80211_CMD_SET_BEACON:
1720                 call = rdev->ops->set_beacon;
1721                 break;
1722         default:
1723                 WARN_ON(1);
1724                 err = -EOPNOTSUPP;
1725                 goto out;
1726         }
1727
1728         if (!call) {
1729                 err = -EOPNOTSUPP;
1730                 goto out;
1731         }
1732
1733         memset(&params, 0, sizeof(params));
1734
1735         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
1736                 params.interval =
1737                     nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1738                 haveinfo = 1;
1739         }
1740
1741         if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
1742                 params.dtim_period =
1743                     nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1744                 haveinfo = 1;
1745         }
1746
1747         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
1748                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1749                 params.head_len =
1750                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
1751                 haveinfo = 1;
1752         }
1753
1754         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
1755                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1756                 params.tail_len =
1757                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
1758                 haveinfo = 1;
1759         }
1760
1761         if (!haveinfo) {
1762                 err = -EINVAL;
1763                 goto out;
1764         }
1765
1766         err = call(&rdev->wiphy, dev, &params);
1767
1768  out:
1769         cfg80211_unlock_rdev(rdev);
1770         dev_put(dev);
1771  unlock_rtnl:
1772         rtnl_unlock();
1773
1774         return err;
1775 }
1776
1777 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
1778 {
1779         struct cfg80211_registered_device *rdev;
1780         int err;
1781         struct net_device *dev;
1782
1783         rtnl_lock();
1784
1785         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
1786         if (err)
1787                 goto unlock_rtnl;
1788
1789         if (!rdev->ops->del_beacon) {
1790                 err = -EOPNOTSUPP;
1791                 goto out;
1792         }
1793
1794         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1795             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1796                 err = -EOPNOTSUPP;
1797                 goto out;
1798         }
1799         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
1800
1801  out:
1802         cfg80211_unlock_rdev(rdev);
1803         dev_put(dev);
1804  unlock_rtnl:
1805         rtnl_unlock();
1806
1807         return err;
1808 }
1809
1810 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
1811         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
1812         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
1813         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
1814         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
1815 };
1816
1817 static int parse_station_flags(struct genl_info *info,
1818                                struct station_parameters *params)
1819 {
1820         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
1821         struct nlattr *nla;
1822         int flag;
1823
1824         /*
1825          * Try parsing the new attribute first so userspace
1826          * can specify both for older kernels.
1827          */
1828         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
1829         if (nla) {
1830                 struct nl80211_sta_flag_update *sta_flags;
1831
1832                 sta_flags = nla_data(nla);
1833                 params->sta_flags_mask = sta_flags->mask;
1834                 params->sta_flags_set = sta_flags->set;
1835                 if ((params->sta_flags_mask |
1836                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
1837                         return -EINVAL;
1838                 return 0;
1839         }
1840
1841         /* if present, parse the old attribute */
1842
1843         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
1844         if (!nla)
1845                 return 0;
1846
1847         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
1848                              nla, sta_flags_policy))
1849                 return -EINVAL;
1850
1851         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
1852         params->sta_flags_mask &= ~1;
1853
1854         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
1855                 if (flags[flag])
1856                         params->sta_flags_set |= (1<<flag);
1857
1858         return 0;
1859 }
1860
1861 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
1862                                 int flags, struct net_device *dev,
1863                                 const u8 *mac_addr, struct station_info *sinfo)
1864 {
1865         void *hdr;
1866         struct nlattr *sinfoattr, *txrate;
1867         u16 bitrate;
1868
1869         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
1870         if (!hdr)
1871                 return -1;
1872
1873         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1874         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1875
1876         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
1877
1878         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
1879         if (!sinfoattr)
1880                 goto nla_put_failure;
1881         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
1882                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
1883                             sinfo->inactive_time);
1884         if (sinfo->filled & STATION_INFO_RX_BYTES)
1885                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
1886                             sinfo->rx_bytes);
1887         if (sinfo->filled & STATION_INFO_TX_BYTES)
1888                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
1889                             sinfo->tx_bytes);
1890         if (sinfo->filled & STATION_INFO_LLID)
1891                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
1892                             sinfo->llid);
1893         if (sinfo->filled & STATION_INFO_PLID)
1894                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
1895                             sinfo->plid);
1896         if (sinfo->filled & STATION_INFO_PLINK_STATE)
1897                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
1898                             sinfo->plink_state);
1899         if (sinfo->filled & STATION_INFO_SIGNAL)
1900                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
1901                            sinfo->signal);
1902         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
1903                 txrate = nla_nest_start(msg, NL80211_STA_INFO_TX_BITRATE);
1904                 if (!txrate)
1905                         goto nla_put_failure;
1906
1907                 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
1908                 bitrate = cfg80211_calculate_bitrate(&sinfo->txrate);
1909                 if (bitrate > 0)
1910                         NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
1911
1912                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_MCS)
1913                         NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS,
1914                                     sinfo->txrate.mcs);
1915                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
1916                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
1917                 if (sinfo->txrate.flags & RATE_INFO_FLAGS_SHORT_GI)
1918                         NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
1919
1920                 nla_nest_end(msg, txrate);
1921         }
1922         if (sinfo->filled & STATION_INFO_RX_PACKETS)
1923                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
1924                             sinfo->rx_packets);
1925         if (sinfo->filled & STATION_INFO_TX_PACKETS)
1926                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
1927                             sinfo->tx_packets);
1928         nla_nest_end(msg, sinfoattr);
1929
1930         return genlmsg_end(msg, hdr);
1931
1932  nla_put_failure:
1933         genlmsg_cancel(msg, hdr);
1934         return -EMSGSIZE;
1935 }
1936
1937 static int nl80211_dump_station(struct sk_buff *skb,
1938                                 struct netlink_callback *cb)
1939 {
1940         struct station_info sinfo;
1941         struct cfg80211_registered_device *dev;
1942         struct net_device *netdev;
1943         u8 mac_addr[ETH_ALEN];
1944         int ifidx = cb->args[0];
1945         int sta_idx = cb->args[1];
1946         int err;
1947
1948         if (!ifidx)
1949                 ifidx = nl80211_get_ifidx(cb);
1950         if (ifidx < 0)
1951                 return ifidx;
1952
1953         rtnl_lock();
1954
1955         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
1956         if (!netdev) {
1957                 err = -ENODEV;
1958                 goto out_rtnl;
1959         }
1960
1961         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
1962         if (IS_ERR(dev)) {
1963                 err = PTR_ERR(dev);
1964                 goto out_rtnl;
1965         }
1966
1967         if (!dev->ops->dump_station) {
1968                 err = -EOPNOTSUPP;
1969                 goto out_err;
1970         }
1971
1972         while (1) {
1973                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
1974                                              mac_addr, &sinfo);
1975                 if (err == -ENOENT)
1976                         break;
1977                 if (err)
1978                         goto out_err;
1979
1980                 if (nl80211_send_station(skb,
1981                                 NETLINK_CB(cb->skb).pid,
1982                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1983                                 netdev, mac_addr,
1984                                 &sinfo) < 0)
1985                         goto out;
1986
1987                 sta_idx++;
1988         }
1989
1990
1991  out:
1992         cb->args[1] = sta_idx;
1993         err = skb->len;
1994  out_err:
1995         cfg80211_unlock_rdev(dev);
1996  out_rtnl:
1997         rtnl_unlock();
1998
1999         return err;
2000 }
2001
2002 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2003 {
2004         struct cfg80211_registered_device *rdev;
2005         int err;
2006         struct net_device *dev;
2007         struct station_info sinfo;
2008         struct sk_buff *msg;
2009         u8 *mac_addr = NULL;
2010
2011         memset(&sinfo, 0, sizeof(sinfo));
2012
2013         if (!info->attrs[NL80211_ATTR_MAC])
2014                 return -EINVAL;
2015
2016         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2017
2018         rtnl_lock();
2019
2020         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2021         if (err)
2022                 goto out_rtnl;
2023
2024         if (!rdev->ops->get_station) {
2025                 err = -EOPNOTSUPP;
2026                 goto out;
2027         }
2028
2029         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2030         if (err)
2031                 goto out;
2032
2033         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2034         if (!msg)
2035                 goto out;
2036
2037         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2038                                  dev, mac_addr, &sinfo) < 0)
2039                 goto out_free;
2040
2041         err = genlmsg_reply(msg, info);
2042         goto out;
2043
2044  out_free:
2045         nlmsg_free(msg);
2046  out:
2047         cfg80211_unlock_rdev(rdev);
2048         dev_put(dev);
2049  out_rtnl:
2050         rtnl_unlock();
2051
2052         return err;
2053 }
2054
2055 /*
2056  * Get vlan interface making sure it is running and on the right wiphy.
2057  */
2058 static int get_vlan(struct genl_info *info,
2059                     struct cfg80211_registered_device *rdev,
2060                     struct net_device **vlan)
2061 {
2062         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2063         *vlan = NULL;
2064
2065         if (vlanattr) {
2066                 *vlan = dev_get_by_index(genl_info_net(info),
2067                                          nla_get_u32(vlanattr));
2068                 if (!*vlan)
2069                         return -ENODEV;
2070                 if (!(*vlan)->ieee80211_ptr)
2071                         return -EINVAL;
2072                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2073                         return -EINVAL;
2074                 if (!netif_running(*vlan))
2075                         return -ENETDOWN;
2076         }
2077         return 0;
2078 }
2079
2080 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2081 {
2082         struct cfg80211_registered_device *rdev;
2083         int err;
2084         struct net_device *dev;
2085         struct station_parameters params;
2086         u8 *mac_addr = NULL;
2087
2088         memset(&params, 0, sizeof(params));
2089
2090         params.listen_interval = -1;
2091
2092         if (info->attrs[NL80211_ATTR_STA_AID])
2093                 return -EINVAL;
2094
2095         if (!info->attrs[NL80211_ATTR_MAC])
2096                 return -EINVAL;
2097
2098         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2099
2100         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2101                 params.supported_rates =
2102                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2103                 params.supported_rates_len =
2104                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2105         }
2106
2107         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2108                 params.listen_interval =
2109                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2110
2111         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2112                 params.ht_capa =
2113                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2114
2115         if (parse_station_flags(info, &params))
2116                 return -EINVAL;
2117
2118         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2119                 params.plink_action =
2120                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2121
2122         rtnl_lock();
2123
2124         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2125         if (err)
2126                 goto out_rtnl;
2127
2128         err = get_vlan(info, rdev, &params.vlan);
2129         if (err)
2130                 goto out;
2131
2132         /* validate settings */
2133         err = 0;
2134
2135         switch (dev->ieee80211_ptr->iftype) {
2136         case NL80211_IFTYPE_AP:
2137         case NL80211_IFTYPE_AP_VLAN:
2138         case NL80211_IFTYPE_P2P_GO:
2139                 /* disallow mesh-specific things */
2140                 if (params.plink_action)
2141                         err = -EINVAL;
2142                 break;
2143         case NL80211_IFTYPE_P2P_CLIENT:
2144         case NL80211_IFTYPE_STATION:
2145                 /* disallow everything but AUTHORIZED flag */
2146                 if (params.plink_action)
2147                         err = -EINVAL;
2148                 if (params.vlan)
2149                         err = -EINVAL;
2150                 if (params.supported_rates)
2151                         err = -EINVAL;
2152                 if (params.ht_capa)
2153                         err = -EINVAL;
2154                 if (params.listen_interval >= 0)
2155                         err = -EINVAL;
2156                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2157                         err = -EINVAL;
2158                 break;
2159         case NL80211_IFTYPE_MESH_POINT:
2160                 /* disallow things mesh doesn't support */
2161                 if (params.vlan)
2162                         err = -EINVAL;
2163                 if (params.ht_capa)
2164                         err = -EINVAL;
2165                 if (params.listen_interval >= 0)
2166                         err = -EINVAL;
2167                 if (params.supported_rates)
2168                         err = -EINVAL;
2169                 if (params.sta_flags_mask)
2170                         err = -EINVAL;
2171                 break;
2172         default:
2173                 err = -EINVAL;
2174         }
2175
2176         if (err)
2177                 goto out;
2178
2179         if (!rdev->ops->change_station) {
2180                 err = -EOPNOTSUPP;
2181                 goto out;
2182         }
2183
2184         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2185
2186  out:
2187         if (params.vlan)
2188                 dev_put(params.vlan);
2189         cfg80211_unlock_rdev(rdev);
2190         dev_put(dev);
2191  out_rtnl:
2192         rtnl_unlock();
2193
2194         return err;
2195 }
2196
2197 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2198 {
2199         struct cfg80211_registered_device *rdev;
2200         int err;
2201         struct net_device *dev;
2202         struct station_parameters params;
2203         u8 *mac_addr = NULL;
2204
2205         memset(&params, 0, sizeof(params));
2206
2207         if (!info->attrs[NL80211_ATTR_MAC])
2208                 return -EINVAL;
2209
2210         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2211                 return -EINVAL;
2212
2213         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2214                 return -EINVAL;
2215
2216         if (!info->attrs[NL80211_ATTR_STA_AID])
2217                 return -EINVAL;
2218
2219         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2220         params.supported_rates =
2221                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2222         params.supported_rates_len =
2223                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2224         params.listen_interval =
2225                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2226
2227         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2228         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2229                 return -EINVAL;
2230
2231         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2232                 params.ht_capa =
2233                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2234
2235         if (parse_station_flags(info, &params))
2236                 return -EINVAL;
2237
2238         rtnl_lock();
2239
2240         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2241         if (err)
2242                 goto out_rtnl;
2243
2244         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2245             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2246             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
2247                 err = -EINVAL;
2248                 goto out;
2249         }
2250
2251         err = get_vlan(info, rdev, &params.vlan);
2252         if (err)
2253                 goto out;
2254
2255         /* validate settings */
2256         err = 0;
2257
2258         if (!rdev->ops->add_station) {
2259                 err = -EOPNOTSUPP;
2260                 goto out;
2261         }
2262
2263         if (!netif_running(dev)) {
2264                 err = -ENETDOWN;
2265                 goto out;
2266         }
2267
2268         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2269
2270  out:
2271         if (params.vlan)
2272                 dev_put(params.vlan);
2273         cfg80211_unlock_rdev(rdev);
2274         dev_put(dev);
2275  out_rtnl:
2276         rtnl_unlock();
2277
2278         return err;
2279 }
2280
2281 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2282 {
2283         struct cfg80211_registered_device *rdev;
2284         int err;
2285         struct net_device *dev;
2286         u8 *mac_addr = NULL;
2287
2288         if (info->attrs[NL80211_ATTR_MAC])
2289                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2290
2291         rtnl_lock();
2292
2293         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2294         if (err)
2295                 goto out_rtnl;
2296
2297         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2298             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2299             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2300             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
2301                 err = -EINVAL;
2302                 goto out;
2303         }
2304
2305         if (!rdev->ops->del_station) {
2306                 err = -EOPNOTSUPP;
2307                 goto out;
2308         }
2309
2310         err = rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2311
2312  out:
2313         cfg80211_unlock_rdev(rdev);
2314         dev_put(dev);
2315  out_rtnl:
2316         rtnl_unlock();
2317
2318         return err;
2319 }
2320
2321 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2322                                 int flags, struct net_device *dev,
2323                                 u8 *dst, u8 *next_hop,
2324                                 struct mpath_info *pinfo)
2325 {
2326         void *hdr;
2327         struct nlattr *pinfoattr;
2328
2329         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2330         if (!hdr)
2331                 return -1;
2332
2333         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2334         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2335         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2336
2337         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2338
2339         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2340         if (!pinfoattr)
2341                 goto nla_put_failure;
2342         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2343                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2344                             pinfo->frame_qlen);
2345         if (pinfo->filled & MPATH_INFO_SN)
2346                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2347                             pinfo->sn);
2348         if (pinfo->filled & MPATH_INFO_METRIC)
2349                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2350                             pinfo->metric);
2351         if (pinfo->filled & MPATH_INFO_EXPTIME)
2352                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2353                             pinfo->exptime);
2354         if (pinfo->filled & MPATH_INFO_FLAGS)
2355                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2356                             pinfo->flags);
2357         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2358                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2359                             pinfo->discovery_timeout);
2360         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2361                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2362                             pinfo->discovery_retries);
2363
2364         nla_nest_end(msg, pinfoattr);
2365
2366         return genlmsg_end(msg, hdr);
2367
2368  nla_put_failure:
2369         genlmsg_cancel(msg, hdr);
2370         return -EMSGSIZE;
2371 }
2372
2373 static int nl80211_dump_mpath(struct sk_buff *skb,
2374                               struct netlink_callback *cb)
2375 {
2376         struct mpath_info pinfo;
2377         struct cfg80211_registered_device *dev;
2378         struct net_device *netdev;
2379         u8 dst[ETH_ALEN];
2380         u8 next_hop[ETH_ALEN];
2381         int ifidx = cb->args[0];
2382         int path_idx = cb->args[1];
2383         int err;
2384
2385         if (!ifidx)
2386                 ifidx = nl80211_get_ifidx(cb);
2387         if (ifidx < 0)
2388                 return ifidx;
2389
2390         rtnl_lock();
2391
2392         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
2393         if (!netdev) {
2394                 err = -ENODEV;
2395                 goto out_rtnl;
2396         }
2397
2398         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
2399         if (IS_ERR(dev)) {
2400                 err = PTR_ERR(dev);
2401                 goto out_rtnl;
2402         }
2403
2404         if (!dev->ops->dump_mpath) {
2405                 err = -EOPNOTSUPP;
2406                 goto out_err;
2407         }
2408
2409         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2410                 err = -EOPNOTSUPP;
2411                 goto out_err;
2412         }
2413
2414         while (1) {
2415                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2416                                            dst, next_hop, &pinfo);
2417                 if (err == -ENOENT)
2418                         break;
2419                 if (err)
2420                         goto out_err;
2421
2422                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2423                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2424                                        netdev, dst, next_hop,
2425                                        &pinfo) < 0)
2426                         goto out;
2427
2428                 path_idx++;
2429         }
2430
2431
2432  out:
2433         cb->args[1] = path_idx;
2434         err = skb->len;
2435  out_err:
2436         cfg80211_unlock_rdev(dev);
2437  out_rtnl:
2438         rtnl_unlock();
2439
2440         return err;
2441 }
2442
2443 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2444 {
2445         struct cfg80211_registered_device *rdev;
2446         int err;
2447         struct net_device *dev;
2448         struct mpath_info pinfo;
2449         struct sk_buff *msg;
2450         u8 *dst = NULL;
2451         u8 next_hop[ETH_ALEN];
2452
2453         memset(&pinfo, 0, sizeof(pinfo));
2454
2455         if (!info->attrs[NL80211_ATTR_MAC])
2456                 return -EINVAL;
2457
2458         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2459
2460         rtnl_lock();
2461
2462         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2463         if (err)
2464                 goto out_rtnl;
2465
2466         if (!rdev->ops->get_mpath) {
2467                 err = -EOPNOTSUPP;
2468                 goto out;
2469         }
2470
2471         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2472                 err = -EOPNOTSUPP;
2473                 goto out;
2474         }
2475
2476         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2477         if (err)
2478                 goto out;
2479
2480         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2481         if (!msg)
2482                 goto out;
2483
2484         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2485                                  dev, dst, next_hop, &pinfo) < 0)
2486                 goto out_free;
2487
2488         err = genlmsg_reply(msg, info);
2489         goto out;
2490
2491  out_free:
2492         nlmsg_free(msg);
2493  out:
2494         cfg80211_unlock_rdev(rdev);
2495         dev_put(dev);
2496  out_rtnl:
2497         rtnl_unlock();
2498
2499         return err;
2500 }
2501
2502 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2503 {
2504         struct cfg80211_registered_device *rdev;
2505         int err;
2506         struct net_device *dev;
2507         u8 *dst = NULL;
2508         u8 *next_hop = NULL;
2509
2510         if (!info->attrs[NL80211_ATTR_MAC])
2511                 return -EINVAL;
2512
2513         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2514                 return -EINVAL;
2515
2516         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2517         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2518
2519         rtnl_lock();
2520
2521         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2522         if (err)
2523                 goto out_rtnl;
2524
2525         if (!rdev->ops->change_mpath) {
2526                 err = -EOPNOTSUPP;
2527                 goto out;
2528         }
2529
2530         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2531                 err = -EOPNOTSUPP;
2532                 goto out;
2533         }
2534
2535         if (!netif_running(dev)) {
2536                 err = -ENETDOWN;
2537                 goto out;
2538         }
2539
2540         err = rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2541
2542  out:
2543         cfg80211_unlock_rdev(rdev);
2544         dev_put(dev);
2545  out_rtnl:
2546         rtnl_unlock();
2547
2548         return err;
2549 }
2550 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2551 {
2552         struct cfg80211_registered_device *rdev;
2553         int err;
2554         struct net_device *dev;
2555         u8 *dst = NULL;
2556         u8 *next_hop = NULL;
2557
2558         if (!info->attrs[NL80211_ATTR_MAC])
2559                 return -EINVAL;
2560
2561         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2562                 return -EINVAL;
2563
2564         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2565         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2566
2567         rtnl_lock();
2568
2569         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2570         if (err)
2571                 goto out_rtnl;
2572
2573         if (!rdev->ops->add_mpath) {
2574                 err = -EOPNOTSUPP;
2575                 goto out;
2576         }
2577
2578         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2579                 err = -EOPNOTSUPP;
2580                 goto out;
2581         }
2582
2583         if (!netif_running(dev)) {
2584                 err = -ENETDOWN;
2585                 goto out;
2586         }
2587
2588         err = rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2589
2590  out:
2591         cfg80211_unlock_rdev(rdev);
2592         dev_put(dev);
2593  out_rtnl:
2594         rtnl_unlock();
2595
2596         return err;
2597 }
2598
2599 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2600 {
2601         struct cfg80211_registered_device *rdev;
2602         int err;
2603         struct net_device *dev;
2604         u8 *dst = NULL;
2605
2606         if (info->attrs[NL80211_ATTR_MAC])
2607                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2608
2609         rtnl_lock();
2610
2611         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2612         if (err)
2613                 goto out_rtnl;
2614
2615         if (!rdev->ops->del_mpath) {
2616                 err = -EOPNOTSUPP;
2617                 goto out;
2618         }
2619
2620         err = rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2621
2622  out:
2623         cfg80211_unlock_rdev(rdev);
2624         dev_put(dev);
2625  out_rtnl:
2626         rtnl_unlock();
2627
2628         return err;
2629 }
2630
2631 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2632 {
2633         struct cfg80211_registered_device *rdev;
2634         int err;
2635         struct net_device *dev;
2636         struct bss_parameters params;
2637
2638         memset(&params, 0, sizeof(params));
2639         /* default to not changing parameters */
2640         params.use_cts_prot = -1;
2641         params.use_short_preamble = -1;
2642         params.use_short_slot_time = -1;
2643         params.ap_isolate = -1;
2644
2645         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2646                 params.use_cts_prot =
2647                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2648         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2649                 params.use_short_preamble =
2650                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2651         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2652                 params.use_short_slot_time =
2653                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2654         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2655                 params.basic_rates =
2656                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2657                 params.basic_rates_len =
2658                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2659         }
2660         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2661                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2662
2663         rtnl_lock();
2664
2665         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2666         if (err)
2667                 goto out_rtnl;
2668
2669         if (!rdev->ops->change_bss) {
2670                 err = -EOPNOTSUPP;
2671                 goto out;
2672         }
2673
2674         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2675             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
2676                 err = -EOPNOTSUPP;
2677                 goto out;
2678         }
2679
2680         err = rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2681
2682  out:
2683         cfg80211_unlock_rdev(rdev);
2684         dev_put(dev);
2685  out_rtnl:
2686         rtnl_unlock();
2687
2688         return err;
2689 }
2690
2691 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2692         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2693         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2694         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2695         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2696         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2697         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2698 };
2699
2700 static int parse_reg_rule(struct nlattr *tb[],
2701         struct ieee80211_reg_rule *reg_rule)
2702 {
2703         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2704         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2705
2706         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2707                 return -EINVAL;
2708         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2709                 return -EINVAL;
2710         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2711                 return -EINVAL;
2712         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2713                 return -EINVAL;
2714         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2715                 return -EINVAL;
2716
2717         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2718
2719         freq_range->start_freq_khz =
2720                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2721         freq_range->end_freq_khz =
2722                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2723         freq_range->max_bandwidth_khz =
2724                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2725
2726         power_rule->max_eirp =
2727                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2728
2729         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2730                 power_rule->max_antenna_gain =
2731                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2732
2733         return 0;
2734 }
2735
2736 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2737 {
2738         int r;
2739         char *data = NULL;
2740
2741         /*
2742          * You should only get this when cfg80211 hasn't yet initialized
2743          * completely when built-in to the kernel right between the time
2744          * window between nl80211_init() and regulatory_init(), if that is
2745          * even possible.
2746          */
2747         mutex_lock(&cfg80211_mutex);
2748         if (unlikely(!cfg80211_regdomain)) {
2749                 mutex_unlock(&cfg80211_mutex);
2750                 return -EINPROGRESS;
2751         }
2752         mutex_unlock(&cfg80211_mutex);
2753
2754         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2755                 return -EINVAL;
2756
2757         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2758
2759         r = regulatory_hint_user(data);
2760
2761         return r;
2762 }
2763
2764 static int nl80211_get_mesh_params(struct sk_buff *skb,
2765         struct genl_info *info)
2766 {
2767         struct cfg80211_registered_device *rdev;
2768         struct mesh_config cur_params;
2769         int err;
2770         struct net_device *dev;
2771         void *hdr;
2772         struct nlattr *pinfoattr;
2773         struct sk_buff *msg;
2774
2775         rtnl_lock();
2776
2777         /* Look up our device */
2778         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2779         if (err)
2780                 goto out_rtnl;
2781
2782         if (!rdev->ops->get_mesh_params) {
2783                 err = -EOPNOTSUPP;
2784                 goto out;
2785         }
2786
2787         /* Get the mesh params */
2788         err = rdev->ops->get_mesh_params(&rdev->wiphy, dev, &cur_params);
2789         if (err)
2790                 goto out;
2791
2792         /* Draw up a netlink message to send back */
2793         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2794         if (!msg) {
2795                 err = -ENOBUFS;
2796                 goto out;
2797         }
2798         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2799                              NL80211_CMD_GET_MESH_PARAMS);
2800         if (!hdr)
2801                 goto nla_put_failure;
2802         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_PARAMS);
2803         if (!pinfoattr)
2804                 goto nla_put_failure;
2805         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2806         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2807                         cur_params.dot11MeshRetryTimeout);
2808         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2809                         cur_params.dot11MeshConfirmTimeout);
2810         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2811                         cur_params.dot11MeshHoldingTimeout);
2812         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2813                         cur_params.dot11MeshMaxPeerLinks);
2814         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2815                         cur_params.dot11MeshMaxRetries);
2816         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2817                         cur_params.dot11MeshTTL);
2818         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2819                         cur_params.auto_open_plinks);
2820         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2821                         cur_params.dot11MeshHWMPmaxPREQretries);
2822         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2823                         cur_params.path_refresh_time);
2824         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2825                         cur_params.min_discovery_timeout);
2826         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2827                         cur_params.dot11MeshHWMPactivePathTimeout);
2828         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2829                         cur_params.dot11MeshHWMPpreqMinInterval);
2830         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2831                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2832         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2833                         cur_params.dot11MeshHWMPRootMode);
2834         nla_nest_end(msg, pinfoattr);
2835         genlmsg_end(msg, hdr);
2836         err = genlmsg_reply(msg, info);
2837         goto out;
2838
2839  nla_put_failure:
2840         genlmsg_cancel(msg, hdr);
2841         nlmsg_free(msg);
2842         err = -EMSGSIZE;
2843  out:
2844         /* Cleanup */
2845         cfg80211_unlock_rdev(rdev);
2846         dev_put(dev);
2847  out_rtnl:
2848         rtnl_unlock();
2849
2850         return err;
2851 }
2852
2853 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2854 do {\
2855         if (table[attr_num]) {\
2856                 cfg.param = nla_fn(table[attr_num]); \
2857                 mask |= (1 << (attr_num - 1)); \
2858         } \
2859 } while (0);\
2860
2861 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2862         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2863         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2864         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2865         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2866         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2867         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2868         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2869
2870         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2871         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2872         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2873         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2874         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2875         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2876 };
2877
2878 static int nl80211_set_mesh_params(struct sk_buff *skb, struct genl_info *info)
2879 {
2880         int err;
2881         u32 mask;
2882         struct cfg80211_registered_device *rdev;
2883         struct net_device *dev;
2884         struct mesh_config cfg;
2885         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2886         struct nlattr *parent_attr;
2887
2888         parent_attr = info->attrs[NL80211_ATTR_MESH_PARAMS];
2889         if (!parent_attr)
2890                 return -EINVAL;
2891         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2892                         parent_attr, nl80211_meshconf_params_policy))
2893                 return -EINVAL;
2894
2895         rtnl_lock();
2896
2897         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
2898         if (err)
2899                 goto out_rtnl;
2900
2901         if (!rdev->ops->set_mesh_params) {
2902                 err = -EOPNOTSUPP;
2903                 goto out;
2904         }
2905
2906         /* This makes sure that there aren't more than 32 mesh config
2907          * parameters (otherwise our bitfield scheme would not work.) */
2908         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2909
2910         /* Fill in the params struct */
2911         mask = 0;
2912         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2913                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2914         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
2915                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
2916         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
2917                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
2918         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
2919                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
2920         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
2921                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
2922         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
2923                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
2924         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
2925                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
2926         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
2927                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2928                         nla_get_u8);
2929         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
2930                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
2931         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
2932                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2933                         nla_get_u16);
2934         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
2935                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2936                         nla_get_u32);
2937         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
2938                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2939                         nla_get_u16);
2940         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2941                         dot11MeshHWMPnetDiameterTraversalTime,
2942                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2943                         nla_get_u16);
2944         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
2945                         dot11MeshHWMPRootMode, mask,
2946                         NL80211_MESHCONF_HWMP_ROOTMODE,
2947                         nla_get_u8);
2948
2949         /* Apply changes */
2950         err = rdev->ops->set_mesh_params(&rdev->wiphy, dev, &cfg, mask);
2951
2952  out:
2953         /* cleanup */
2954         cfg80211_unlock_rdev(rdev);
2955         dev_put(dev);
2956  out_rtnl:
2957         rtnl_unlock();
2958
2959         return err;
2960 }
2961
2962 #undef FILL_IN_MESH_PARAM_IF_SET
2963
2964 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
2965 {
2966         struct sk_buff *msg;
2967         void *hdr = NULL;
2968         struct nlattr *nl_reg_rules;
2969         unsigned int i;
2970         int err = -EINVAL;
2971
2972         mutex_lock(&cfg80211_mutex);
2973
2974         if (!cfg80211_regdomain)
2975                 goto out;
2976
2977         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2978         if (!msg) {
2979                 err = -ENOBUFS;
2980                 goto out;
2981         }
2982
2983         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2984                              NL80211_CMD_GET_REG);
2985         if (!hdr)
2986                 goto nla_put_failure;
2987
2988         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
2989                 cfg80211_regdomain->alpha2);
2990
2991         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
2992         if (!nl_reg_rules)
2993                 goto nla_put_failure;
2994
2995         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
2996                 struct nlattr *nl_reg_rule;
2997                 const struct ieee80211_reg_rule *reg_rule;
2998                 const struct ieee80211_freq_range *freq_range;
2999                 const struct ieee80211_power_rule *power_rule;
3000
3001                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3002                 freq_range = &reg_rule->freq_range;
3003                 power_rule = &reg_rule->power_rule;
3004
3005                 nl_reg_rule = nla_nest_start(msg, i);
3006                 if (!nl_reg_rule)
3007                         goto nla_put_failure;
3008
3009                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3010                         reg_rule->flags);
3011                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3012                         freq_range->start_freq_khz);
3013                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3014                         freq_range->end_freq_khz);
3015                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3016                         freq_range->max_bandwidth_khz);
3017                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3018                         power_rule->max_antenna_gain);
3019                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3020                         power_rule->max_eirp);
3021
3022                 nla_nest_end(msg, nl_reg_rule);
3023         }
3024
3025         nla_nest_end(msg, nl_reg_rules);
3026
3027         genlmsg_end(msg, hdr);
3028         err = genlmsg_reply(msg, info);
3029         goto out;
3030
3031 nla_put_failure:
3032         genlmsg_cancel(msg, hdr);
3033         nlmsg_free(msg);
3034         err = -EMSGSIZE;
3035 out:
3036         mutex_unlock(&cfg80211_mutex);
3037         return err;
3038 }
3039
3040 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3041 {
3042         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3043         struct nlattr *nl_reg_rule;
3044         char *alpha2 = NULL;
3045         int rem_reg_rules = 0, r = 0;
3046         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3047         struct ieee80211_regdomain *rd = NULL;
3048
3049         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3050                 return -EINVAL;
3051
3052         if (!info->attrs[NL80211_ATTR_REG_RULES])
3053                 return -EINVAL;
3054
3055         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3056
3057         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3058                         rem_reg_rules) {
3059                 num_rules++;
3060                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3061                         return -EINVAL;
3062         }
3063
3064         mutex_lock(&cfg80211_mutex);
3065
3066         if (!reg_is_valid_request(alpha2)) {
3067                 r = -EINVAL;
3068                 goto bad_reg;
3069         }
3070
3071         size_of_regd = sizeof(struct ieee80211_regdomain) +
3072                 (num_rules * sizeof(struct ieee80211_reg_rule));
3073
3074         rd = kzalloc(size_of_regd, GFP_KERNEL);
3075         if (!rd) {
3076                 r = -ENOMEM;
3077                 goto bad_reg;
3078         }
3079
3080         rd->n_reg_rules = num_rules;
3081         rd->alpha2[0] = alpha2[0];
3082         rd->alpha2[1] = alpha2[1];
3083
3084         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3085                         rem_reg_rules) {
3086                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3087                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3088                         reg_rule_policy);
3089                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3090                 if (r)
3091                         goto bad_reg;
3092
3093                 rule_idx++;
3094
3095                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3096                         r = -EINVAL;
3097                         goto bad_reg;
3098                 }
3099         }
3100
3101         BUG_ON(rule_idx != num_rules);
3102
3103         r = set_regdom(rd);
3104
3105         mutex_unlock(&cfg80211_mutex);
3106
3107         return r;
3108
3109  bad_reg:
3110         mutex_unlock(&cfg80211_mutex);
3111         kfree(rd);
3112         return r;
3113 }
3114
3115 static int validate_scan_freqs(struct nlattr *freqs)
3116 {
3117         struct nlattr *attr1, *attr2;
3118         int n_channels = 0, tmp1, tmp2;
3119
3120         nla_for_each_nested(attr1, freqs, tmp1) {
3121                 n_channels++;
3122                 /*
3123                  * Some hardware has a limited channel list for
3124                  * scanning, and it is pretty much nonsensical
3125                  * to scan for a channel twice, so disallow that
3126                  * and don't require drivers to check that the
3127                  * channel list they get isn't longer than what
3128                  * they can scan, as long as they can scan all
3129                  * the channels they registered at once.
3130                  */
3131                 nla_for_each_nested(attr2, freqs, tmp2)
3132                         if (attr1 != attr2 &&
3133                             nla_get_u32(attr1) == nla_get_u32(attr2))
3134                                 return 0;
3135         }
3136
3137         return n_channels;
3138 }
3139
3140 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3141 {
3142         struct cfg80211_registered_device *rdev;
3143         struct net_device *dev;
3144         struct cfg80211_scan_request *request;
3145         struct cfg80211_ssid *ssid;
3146         struct ieee80211_channel *channel;
3147         struct nlattr *attr;
3148         struct wiphy *wiphy;
3149         int err, tmp, n_ssids = 0, n_channels, i;
3150         enum ieee80211_band band;
3151         size_t ie_len;
3152
3153         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3154                 return -EINVAL;
3155
3156         rtnl_lock();
3157
3158         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3159         if (err)
3160                 goto out_rtnl;
3161
3162         wiphy = &rdev->wiphy;
3163
3164         if (!rdev->ops->scan) {
3165                 err = -EOPNOTSUPP;
3166                 goto out;
3167         }
3168
3169         if (!netif_running(dev)) {
3170                 err = -ENETDOWN;
3171                 goto out;
3172         }
3173
3174         if (rdev->scan_req) {
3175                 err = -EBUSY;
3176                 goto out;
3177         }
3178
3179         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3180                 n_channels = validate_scan_freqs(
3181                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3182                 if (!n_channels) {
3183                         err = -EINVAL;
3184                         goto out;
3185                 }
3186         } else {
3187                 n_channels = 0;
3188
3189                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3190                         if (wiphy->bands[band])
3191                                 n_channels += wiphy->bands[band]->n_channels;
3192         }
3193
3194         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3195                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3196                         n_ssids++;
3197
3198         if (n_ssids > wiphy->max_scan_ssids) {
3199                 err = -EINVAL;
3200                 goto out;
3201         }
3202
3203         if (info->attrs[NL80211_ATTR_IE])
3204                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3205         else
3206                 ie_len = 0;
3207
3208         if (ie_len > wiphy->max_scan_ie_len) {
3209                 err = -EINVAL;
3210                 goto out;
3211         }
3212
3213         request = kzalloc(sizeof(*request)
3214                         + sizeof(*ssid) * n_ssids
3215                         + sizeof(channel) * n_channels
3216                         + ie_len, GFP_KERNEL);
3217         if (!request) {
3218                 err = -ENOMEM;
3219                 goto out;
3220         }
3221
3222         if (n_ssids)
3223                 request->ssids = (void *)&request->channels[n_channels];
3224         request->n_ssids = n_ssids;
3225         if (ie_len) {
3226                 if (request->ssids)
3227                         request->ie = (void *)(request->ssids + n_ssids);
3228                 else
3229                         request->ie = (void *)(request->channels + n_channels);
3230         }
3231
3232         i = 0;
3233         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3234                 /* user specified, bail out if channel not found */
3235                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3236                         struct ieee80211_channel *chan;
3237
3238                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3239
3240                         if (!chan) {
3241                                 err = -EINVAL;
3242                                 goto out_free;
3243                         }
3244
3245                         /* ignore disabled channels */
3246                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3247                                 continue;
3248
3249                         request->channels[i] = chan;
3250                         i++;
3251                 }
3252         } else {
3253                 /* all channels */
3254                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3255                         int j;
3256                         if (!wiphy->bands[band])
3257                                 continue;
3258                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3259                                 struct ieee80211_channel *chan;
3260
3261                                 chan = &wiphy->bands[band]->channels[j];
3262
3263                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3264                                         continue;
3265
3266                                 request->channels[i] = chan;
3267                                 i++;
3268                         }
3269                 }
3270         }
3271
3272         if (!i) {
3273                 err = -EINVAL;
3274                 goto out_free;
3275         }
3276
3277         request->n_channels = i;
3278
3279         i = 0;
3280         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3281                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3282                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3283                                 err = -EINVAL;
3284                                 goto out_free;
3285                         }
3286                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3287                         request->ssids[i].ssid_len = nla_len(attr);
3288                         i++;
3289                 }
3290         }
3291
3292         if (info->attrs[NL80211_ATTR_IE]) {
3293                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3294                 memcpy((void *)request->ie,
3295                        nla_data(info->attrs[NL80211_ATTR_IE]),
3296                        request->ie_len);
3297         }
3298
3299         request->dev = dev;
3300         request->wiphy = &rdev->wiphy;
3301
3302         rdev->scan_req = request;
3303         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3304
3305         if (!err) {
3306                 nl80211_send_scan_start(rdev, dev);
3307                 dev_hold(dev);
3308         }
3309
3310  out_free:
3311         if (err) {
3312                 rdev->scan_req = NULL;
3313                 kfree(request);
3314         }
3315  out:
3316         cfg80211_unlock_rdev(rdev);
3317         dev_put(dev);
3318  out_rtnl:
3319         rtnl_unlock();
3320
3321         return err;
3322 }
3323
3324 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3325                             struct cfg80211_registered_device *rdev,
3326                             struct wireless_dev *wdev,
3327                             struct cfg80211_internal_bss *intbss)
3328 {
3329         struct cfg80211_bss *res = &intbss->pub;
3330         void *hdr;
3331         struct nlattr *bss;
3332         int i;
3333
3334         ASSERT_WDEV_LOCK(wdev);
3335
3336         hdr = nl80211hdr_put(msg, pid, seq, flags,
3337                              NL80211_CMD_NEW_SCAN_RESULTS);
3338         if (!hdr)
3339                 return -1;
3340
3341         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3342         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3343
3344         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3345         if (!bss)
3346                 goto nla_put_failure;
3347         if (!is_zero_ether_addr(res->bssid))
3348                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3349         if (res->information_elements && res->len_information_elements)
3350                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3351                         res->len_information_elements,
3352                         res->information_elements);
3353         if (res->beacon_ies && res->len_beacon_ies &&
3354             res->beacon_ies != res->information_elements)
3355                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3356                         res->len_beacon_ies, res->beacon_ies);
3357         if (res->tsf)
3358                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3359         if (res->beacon_interval)
3360                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3361         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3362         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3363         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3364                 jiffies_to_msecs(jiffies - intbss->ts));
3365
3366         switch (rdev->wiphy.signal_type) {
3367         case CFG80211_SIGNAL_TYPE_MBM:
3368                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3369                 break;
3370         case CFG80211_SIGNAL_TYPE_UNSPEC:
3371                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3372                 break;
3373         default:
3374                 break;
3375         }
3376
3377         switch (wdev->iftype) {
3378         case NL80211_IFTYPE_P2P_CLIENT:
3379         case NL80211_IFTYPE_STATION:
3380                 if (intbss == wdev->current_bss)
3381                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3382                                     NL80211_BSS_STATUS_ASSOCIATED);
3383                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3384                         if (intbss != wdev->auth_bsses[i])
3385                                 continue;
3386                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3387                                     NL80211_BSS_STATUS_AUTHENTICATED);
3388                         break;
3389                 }
3390                 break;
3391         case NL80211_IFTYPE_ADHOC:
3392                 if (intbss == wdev->current_bss)
3393                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3394                                     NL80211_BSS_STATUS_IBSS_JOINED);
3395                 break;
3396         default:
3397                 break;
3398         }
3399
3400         nla_nest_end(msg, bss);
3401
3402         return genlmsg_end(msg, hdr);
3403
3404  nla_put_failure:
3405         genlmsg_cancel(msg, hdr);
3406         return -EMSGSIZE;
3407 }
3408
3409 static int nl80211_dump_scan(struct sk_buff *skb,
3410                              struct netlink_callback *cb)
3411 {
3412         struct cfg80211_registered_device *rdev;
3413         struct net_device *dev;
3414         struct cfg80211_internal_bss *scan;
3415         struct wireless_dev *wdev;
3416         int ifidx = cb->args[0];
3417         int start = cb->args[1], idx = 0;
3418         int err;
3419
3420         if (!ifidx)
3421                 ifidx = nl80211_get_ifidx(cb);
3422         if (ifidx < 0)
3423                 return ifidx;
3424         cb->args[0] = ifidx;
3425
3426         dev = dev_get_by_index(sock_net(skb->sk), ifidx);
3427         if (!dev)
3428                 return -ENODEV;
3429
3430         rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3431         if (IS_ERR(rdev)) {
3432                 err = PTR_ERR(rdev);
3433                 goto out_put_netdev;
3434         }
3435
3436         wdev = dev->ieee80211_ptr;
3437
3438         wdev_lock(wdev);
3439         spin_lock_bh(&rdev->bss_lock);
3440         cfg80211_bss_expire(rdev);
3441
3442         list_for_each_entry(scan, &rdev->bss_list, list) {
3443                 if (++idx <= start)
3444                         continue;
3445                 if (nl80211_send_bss(skb,
3446                                 NETLINK_CB(cb->skb).pid,
3447                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3448                                 rdev, wdev, scan) < 0) {
3449                         idx--;
3450                         goto out;
3451                 }
3452         }
3453
3454  out:
3455         spin_unlock_bh(&rdev->bss_lock);
3456         wdev_unlock(wdev);
3457
3458         cb->args[1] = idx;
3459         err = skb->len;
3460         cfg80211_unlock_rdev(rdev);
3461  out_put_netdev:
3462         dev_put(dev);
3463
3464         return err;
3465 }
3466
3467 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3468                                 int flags, struct net_device *dev,
3469                                 struct survey_info *survey)
3470 {
3471         void *hdr;
3472         struct nlattr *infoattr;
3473
3474         /* Survey without a channel doesn't make sense */
3475         if (!survey->channel)
3476                 return -EINVAL;
3477
3478         hdr = nl80211hdr_put(msg, pid, seq, flags,
3479                              NL80211_CMD_NEW_SURVEY_RESULTS);
3480         if (!hdr)
3481                 return -ENOMEM;
3482
3483         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3484
3485         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3486         if (!infoattr)
3487                 goto nla_put_failure;
3488
3489         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3490                     survey->channel->center_freq);
3491         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3492                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3493                             survey->noise);
3494         if (survey->filled & SURVEY_INFO_IN_USE)
3495                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3496
3497         nla_nest_end(msg, infoattr);
3498
3499         return genlmsg_end(msg, hdr);
3500
3501  nla_put_failure:
3502         genlmsg_cancel(msg, hdr);
3503         return -EMSGSIZE;
3504 }
3505
3506 static int nl80211_dump_survey(struct sk_buff *skb,
3507                         struct netlink_callback *cb)
3508 {
3509         struct survey_info survey;
3510         struct cfg80211_registered_device *dev;
3511         struct net_device *netdev;
3512         int ifidx = cb->args[0];
3513         int survey_idx = cb->args[1];
3514         int res;
3515
3516         if (!ifidx)
3517                 ifidx = nl80211_get_ifidx(cb);
3518         if (ifidx < 0)
3519                 return ifidx;
3520         cb->args[0] = ifidx;
3521
3522         rtnl_lock();
3523
3524         netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
3525         if (!netdev) {
3526                 res = -ENODEV;
3527                 goto out_rtnl;
3528         }
3529
3530         dev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
3531         if (IS_ERR(dev)) {
3532                 res = PTR_ERR(dev);
3533                 goto out_rtnl;
3534         }
3535
3536         if (!dev->ops->dump_survey) {
3537                 res = -EOPNOTSUPP;
3538                 goto out_err;
3539         }
3540
3541         while (1) {
3542                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3543                                             &survey);
3544                 if (res == -ENOENT)
3545                         break;
3546                 if (res)
3547                         goto out_err;
3548
3549                 if (nl80211_send_survey(skb,
3550                                 NETLINK_CB(cb->skb).pid,
3551                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3552                                 netdev,
3553                                 &survey) < 0)
3554                         goto out;
3555                 survey_idx++;
3556         }
3557
3558  out:
3559         cb->args[1] = survey_idx;
3560         res = skb->len;
3561  out_err:
3562         cfg80211_unlock_rdev(dev);
3563  out_rtnl:
3564         rtnl_unlock();
3565
3566         return res;
3567 }
3568
3569 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3570 {
3571         return auth_type <= NL80211_AUTHTYPE_MAX;
3572 }
3573
3574 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3575 {
3576         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3577                                   NL80211_WPA_VERSION_2));
3578 }
3579
3580 static bool nl80211_valid_akm_suite(u32 akm)
3581 {
3582         return akm == WLAN_AKM_SUITE_8021X ||
3583                 akm == WLAN_AKM_SUITE_PSK;
3584 }
3585
3586 static bool nl80211_valid_cipher_suite(u32 cipher)
3587 {
3588         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3589                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3590                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3591                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3592                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3593 }
3594
3595
3596 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3597 {
3598         struct cfg80211_registered_device *rdev;
3599         struct net_device *dev;
3600         struct ieee80211_channel *chan;
3601         const u8 *bssid, *ssid, *ie = NULL;
3602         int err, ssid_len, ie_len = 0;
3603         enum nl80211_auth_type auth_type;
3604         struct key_parse key;
3605         bool local_state_change;
3606
3607         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3608                 return -EINVAL;
3609
3610         if (!info->attrs[NL80211_ATTR_MAC])
3611                 return -EINVAL;
3612
3613         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3614                 return -EINVAL;
3615
3616         if (!info->attrs[NL80211_ATTR_SSID])
3617                 return -EINVAL;
3618
3619         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3620                 return -EINVAL;
3621
3622         err = nl80211_parse_key(info, &key);
3623         if (err)
3624                 return err;
3625
3626         if (key.idx >= 0) {
3627                 if (!key.p.key || !key.p.key_len)
3628                         return -EINVAL;
3629                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3630                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3631                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3632                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3633                         return -EINVAL;
3634                 if (key.idx > 4)
3635                         return -EINVAL;
3636         } else {
3637                 key.p.key_len = 0;
3638                 key.p.key = NULL;
3639         }
3640
3641         rtnl_lock();
3642
3643         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3644         if (err)
3645                 goto unlock_rtnl;
3646
3647         if (key.idx >= 0) {
3648                 int i;
3649                 bool ok = false;
3650                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3651                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3652                                 ok = true;
3653                                 break;
3654                         }
3655                 }
3656                 if (!ok) {
3657                         err = -EINVAL;
3658                         goto out;
3659                 }
3660         }
3661
3662         if (!rdev->ops->auth) {
3663                 err = -EOPNOTSUPP;
3664                 goto out;
3665         }
3666
3667         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3668             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
3669                 err = -EOPNOTSUPP;
3670                 goto out;
3671         }
3672
3673         if (!netif_running(dev)) {
3674                 err = -ENETDOWN;
3675                 goto out;
3676         }
3677
3678         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3679         chan = ieee80211_get_channel(&rdev->wiphy,
3680                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3681         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3682                 err = -EINVAL;
3683                 goto out;
3684         }
3685
3686         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3687         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3688
3689         if (info->attrs[NL80211_ATTR_IE]) {
3690                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3691                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3692         }
3693
3694         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3695         if (!nl80211_valid_auth_type(auth_type)) {
3696                 err = -EINVAL;
3697                 goto out;
3698         }
3699
3700         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3701
3702         err = cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3703                                  ssid, ssid_len, ie, ie_len,
3704                                  key.p.key, key.p.key_len, key.idx,
3705                                  local_state_change);
3706
3707 out:
3708         cfg80211_unlock_rdev(rdev);
3709         dev_put(dev);
3710 unlock_rtnl:
3711         rtnl_unlock();
3712         return err;
3713 }
3714
3715 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3716                                    struct genl_info *info,
3717                                    struct cfg80211_crypto_settings *settings,
3718                                    int cipher_limit)
3719 {
3720         memset(settings, 0, sizeof(*settings));
3721
3722         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3723
3724         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3725                 u16 proto;
3726                 proto = nla_get_u16(
3727                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3728                 settings->control_port_ethertype = cpu_to_be16(proto);
3729                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3730                     proto != ETH_P_PAE)
3731                         return -EINVAL;
3732                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3733                         settings->control_port_no_encrypt = true;
3734         } else
3735                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3736
3737         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3738                 void *data;
3739                 int len, i;
3740
3741                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3742                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3743                 settings->n_ciphers_pairwise = len / sizeof(u32);
3744
3745                 if (len % sizeof(u32))
3746                         return -EINVAL;
3747
3748                 if (settings->n_ciphers_pairwise > cipher_limit)
3749                         return -EINVAL;
3750
3751                 memcpy(settings->ciphers_pairwise, data, len);
3752
3753                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3754                         if (!nl80211_valid_cipher_suite(
3755                                         settings->ciphers_pairwise[i]))
3756                                 return -EINVAL;
3757         }
3758
3759         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
3760                 settings->cipher_group =
3761                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
3762                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
3763                         return -EINVAL;
3764         }
3765
3766         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
3767                 settings->wpa_versions =
3768                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
3769                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
3770                         return -EINVAL;
3771         }
3772
3773         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
3774                 void *data;
3775                 int len, i;
3776
3777                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
3778                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
3779                 settings->n_akm_suites = len / sizeof(u32);
3780
3781                 if (len % sizeof(u32))
3782                         return -EINVAL;
3783
3784                 memcpy(settings->akm_suites, data, len);
3785
3786                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
3787                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
3788                                 return -EINVAL;
3789         }
3790
3791         return 0;
3792 }
3793
3794 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
3795 {
3796         struct cfg80211_registered_device *rdev;
3797         struct net_device *dev;
3798         struct cfg80211_crypto_settings crypto;
3799         struct ieee80211_channel *chan;
3800         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
3801         int err, ssid_len, ie_len = 0;
3802         bool use_mfp = false;
3803
3804         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3805                 return -EINVAL;
3806
3807         if (!info->attrs[NL80211_ATTR_MAC] ||
3808             !info->attrs[NL80211_ATTR_SSID] ||
3809             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
3810                 return -EINVAL;
3811
3812         rtnl_lock();
3813
3814         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3815         if (err)
3816                 goto unlock_rtnl;
3817
3818         if (!rdev->ops->assoc) {
3819                 err = -EOPNOTSUPP;
3820                 goto out;
3821         }
3822
3823         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3824             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
3825                 err = -EOPNOTSUPP;
3826                 goto out;
3827         }
3828
3829         if (!netif_running(dev)) {
3830                 err = -ENETDOWN;
3831                 goto out;
3832         }
3833
3834         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3835
3836         chan = ieee80211_get_channel(&rdev->wiphy,
3837                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3838         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED)) {
3839                 err = -EINVAL;
3840                 goto out;
3841         }
3842
3843         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3844         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3845
3846         if (info->attrs[NL80211_ATTR_IE]) {
3847                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3848                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3849         }
3850
3851         if (info->attrs[NL80211_ATTR_USE_MFP]) {
3852                 enum nl80211_mfp mfp =
3853                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
3854                 if (mfp == NL80211_MFP_REQUIRED)
3855                         use_mfp = true;
3856                 else if (mfp != NL80211_MFP_NO) {
3857                         err = -EINVAL;
3858                         goto out;
3859                 }
3860         }
3861
3862         if (info->attrs[NL80211_ATTR_PREV_BSSID])
3863                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
3864
3865         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
3866         if (!err)
3867                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
3868                                           ssid, ssid_len, ie, ie_len, use_mfp,
3869                                           &crypto);
3870
3871 out:
3872         cfg80211_unlock_rdev(rdev);
3873         dev_put(dev);
3874 unlock_rtnl:
3875         rtnl_unlock();
3876         return err;
3877 }
3878
3879 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
3880 {
3881         struct cfg80211_registered_device *rdev;
3882         struct net_device *dev;
3883         const u8 *ie = NULL, *bssid;
3884         int err, ie_len = 0;
3885         u16 reason_code;
3886         bool local_state_change;
3887
3888         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3889                 return -EINVAL;
3890
3891         if (!info->attrs[NL80211_ATTR_MAC])
3892                 return -EINVAL;
3893
3894         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3895                 return -EINVAL;
3896
3897         rtnl_lock();
3898
3899         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3900         if (err)
3901                 goto unlock_rtnl;
3902
3903         if (!rdev->ops->deauth) {
3904                 err = -EOPNOTSUPP;
3905                 goto out;
3906         }
3907
3908         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3909             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
3910                 err = -EOPNOTSUPP;
3911                 goto out;
3912         }
3913
3914         if (!netif_running(dev)) {
3915                 err = -ENETDOWN;
3916                 goto out;
3917         }
3918
3919         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3920
3921         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3922         if (reason_code == 0) {
3923                 /* Reason Code 0 is reserved */
3924                 err = -EINVAL;
3925                 goto out;
3926         }
3927
3928         if (info->attrs[NL80211_ATTR_IE]) {
3929                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3930                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3931         }
3932
3933         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3934
3935         err = cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
3936                                    local_state_change);
3937
3938 out:
3939         cfg80211_unlock_rdev(rdev);
3940         dev_put(dev);
3941 unlock_rtnl:
3942         rtnl_unlock();
3943         return err;
3944 }
3945
3946 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
3947 {
3948         struct cfg80211_registered_device *rdev;
3949         struct net_device *dev;
3950         const u8 *ie = NULL, *bssid;
3951         int err, ie_len = 0;
3952         u16 reason_code;
3953         bool local_state_change;
3954
3955         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3956                 return -EINVAL;
3957
3958         if (!info->attrs[NL80211_ATTR_MAC])
3959                 return -EINVAL;
3960
3961         if (!info->attrs[NL80211_ATTR_REASON_CODE])
3962                 return -EINVAL;
3963
3964         rtnl_lock();
3965
3966         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
3967         if (err)
3968                 goto unlock_rtnl;
3969
3970         if (!rdev->ops->disassoc) {
3971                 err = -EOPNOTSUPP;
3972                 goto out;
3973         }
3974
3975         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3976             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
3977                 err = -EOPNOTSUPP;
3978                 goto out;
3979         }
3980
3981         if (!netif_running(dev)) {
3982                 err = -ENETDOWN;
3983                 goto out;
3984         }
3985
3986         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3987
3988         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
3989         if (reason_code == 0) {
3990                 /* Reason Code 0 is reserved */
3991                 err = -EINVAL;
3992                 goto out;
3993         }
3994
3995         if (info->attrs[NL80211_ATTR_IE]) {
3996                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3997                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3998         }
3999
4000         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4001
4002         err = cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4003                                      local_state_change);
4004
4005 out:
4006         cfg80211_unlock_rdev(rdev);
4007         dev_put(dev);
4008 unlock_rtnl:
4009         rtnl_unlock();
4010         return err;
4011 }
4012
4013 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4014 {
4015         struct cfg80211_registered_device *rdev;
4016         struct net_device *dev;
4017         struct cfg80211_ibss_params ibss;
4018         struct wiphy *wiphy;
4019         struct cfg80211_cached_keys *connkeys = NULL;
4020         int err;
4021
4022         memset(&ibss, 0, sizeof(ibss));
4023
4024         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4025                 return -EINVAL;
4026
4027         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4028             !info->attrs[NL80211_ATTR_SSID] ||
4029             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4030                 return -EINVAL;
4031
4032         ibss.beacon_interval = 100;
4033
4034         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4035                 ibss.beacon_interval =
4036                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4037                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4038                         return -EINVAL;
4039         }
4040
4041         rtnl_lock();
4042
4043         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4044         if (err)
4045                 goto unlock_rtnl;
4046
4047         if (!rdev->ops->join_ibss) {
4048                 err = -EOPNOTSUPP;
4049                 goto out;
4050         }
4051
4052         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4053                 err = -EOPNOTSUPP;
4054                 goto out;
4055         }
4056
4057         if (!netif_running(dev)) {
4058                 err = -ENETDOWN;
4059                 goto out;
4060         }
4061
4062         wiphy = &rdev->wiphy;
4063
4064         if (info->attrs[NL80211_ATTR_MAC])
4065                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4066         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4067         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4068
4069         if (info->attrs[NL80211_ATTR_IE]) {
4070                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4071                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4072         }
4073
4074         ibss.channel = ieee80211_get_channel(wiphy,
4075                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4076         if (!ibss.channel ||
4077             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4078             ibss.channel->flags & IEEE80211_CHAN_DISABLED) {
4079                 err = -EINVAL;
4080                 goto out;
4081         }
4082
4083         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4084         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4085
4086         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4087                 connkeys = nl80211_parse_connkeys(rdev,
4088                                         info->attrs[NL80211_ATTR_KEYS]);
4089                 if (IS_ERR(connkeys)) {
4090                         err = PTR_ERR(connkeys);
4091                         connkeys = NULL;
4092                         goto out;
4093                 }
4094         }
4095
4096         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4097                 u8 *rates =
4098                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4099                 int n_rates =
4100                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4101                 struct ieee80211_supported_band *sband =
4102                         wiphy->bands[ibss.channel->band];
4103                 int i, j;
4104
4105                 if (n_rates == 0) {
4106                         err = -EINVAL;
4107                         goto out;
4108                 }
4109
4110                 for (i = 0; i < n_rates; i++) {
4111                         int rate = (rates[i] & 0x7f) * 5;
4112                         bool found = false;
4113
4114                         for (j = 0; j < sband->n_bitrates; j++) {
4115                                 if (sband->bitrates[j].bitrate == rate) {
4116                                         found = true;
4117                                         ibss.basic_rates |= BIT(j);
4118                                         break;
4119                                 }
4120                         }
4121                         if (!found) {
4122                                 err = -EINVAL;
4123                                 goto out;
4124                         }
4125                 }
4126         }
4127
4128         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4129
4130 out:
4131         cfg80211_unlock_rdev(rdev);
4132         dev_put(dev);
4133 unlock_rtnl:
4134         if (err)
4135                 kfree(connkeys);
4136         rtnl_unlock();
4137         return err;
4138 }
4139
4140 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4141 {
4142         struct cfg80211_registered_device *rdev;
4143         struct net_device *dev;
4144         int err;
4145
4146         rtnl_lock();
4147
4148         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4149         if (err)
4150                 goto unlock_rtnl;
4151
4152         if (!rdev->ops->leave_ibss) {
4153                 err = -EOPNOTSUPP;
4154                 goto out;
4155         }
4156
4157         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC) {
4158                 err = -EOPNOTSUPP;
4159                 goto out;
4160         }
4161
4162         if (!netif_running(dev)) {
4163                 err = -ENETDOWN;
4164                 goto out;
4165         }
4166
4167         err = cfg80211_leave_ibss(rdev, dev, false);
4168
4169 out:
4170         cfg80211_unlock_rdev(rdev);
4171         dev_put(dev);
4172 unlock_rtnl:
4173         rtnl_unlock();
4174         return err;
4175 }
4176
4177 #ifdef CONFIG_NL80211_TESTMODE
4178 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4179         .name = "testmode",
4180 };
4181
4182 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4183 {
4184         struct cfg80211_registered_device *rdev;
4185         int err;
4186
4187         if (!info->attrs[NL80211_ATTR_TESTDATA])
4188                 return -EINVAL;
4189
4190         rtnl_lock();
4191
4192         rdev = cfg80211_get_dev_from_info(info);
4193         if (IS_ERR(rdev)) {
4194                 err = PTR_ERR(rdev);
4195                 goto unlock_rtnl;
4196         }
4197
4198         err = -EOPNOTSUPP;
4199         if (rdev->ops->testmode_cmd) {
4200                 rdev->testmode_info = info;
4201                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4202                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4203                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4204                 rdev->testmode_info = NULL;
4205         }
4206
4207         cfg80211_unlock_rdev(rdev);
4208
4209  unlock_rtnl:
4210         rtnl_unlock();
4211         return err;
4212 }
4213
4214 static struct sk_buff *
4215 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4216                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4217 {
4218         struct sk_buff *skb;
4219         void *hdr;
4220         struct nlattr *data;
4221
4222         skb = nlmsg_new(approxlen + 100, gfp);
4223         if (!skb)
4224                 return NULL;
4225
4226         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4227         if (!hdr) {
4228                 kfree_skb(skb);
4229                 return NULL;
4230         }
4231
4232         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4233         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4234
4235         ((void **)skb->cb)[0] = rdev;
4236         ((void **)skb->cb)[1] = hdr;
4237         ((void **)skb->cb)[2] = data;
4238
4239         return skb;
4240
4241  nla_put_failure:
4242         kfree_skb(skb);
4243         return NULL;
4244 }
4245
4246 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4247                                                   int approxlen)
4248 {
4249         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4250
4251         if (WARN_ON(!rdev->testmode_info))
4252                 return NULL;
4253
4254         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4255                                 rdev->testmode_info->snd_pid,
4256                                 rdev->testmode_info->snd_seq,
4257                                 GFP_KERNEL);
4258 }
4259 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4260
4261 int cfg80211_testmode_reply(struct sk_buff *skb)
4262 {
4263         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4264         void *hdr = ((void **)skb->cb)[1];
4265         struct nlattr *data = ((void **)skb->cb)[2];
4266
4267         if (WARN_ON(!rdev->testmode_info)) {
4268                 kfree_skb(skb);
4269                 return -EINVAL;
4270         }
4271
4272         nla_nest_end(skb, data);
4273         genlmsg_end(skb, hdr);
4274         return genlmsg_reply(skb, rdev->testmode_info);
4275 }
4276 EXPORT_SYMBOL(cfg80211_testmode_reply);
4277
4278 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4279                                                   int approxlen, gfp_t gfp)
4280 {
4281         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4282
4283         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4284 }
4285 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4286
4287 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4288 {
4289         void *hdr = ((void **)skb->cb)[1];
4290         struct nlattr *data = ((void **)skb->cb)[2];
4291
4292         nla_nest_end(skb, data);
4293         genlmsg_end(skb, hdr);
4294         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4295 }
4296 EXPORT_SYMBOL(cfg80211_testmode_event);
4297 #endif
4298
4299 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4300 {
4301         struct cfg80211_registered_device *rdev;
4302         struct net_device *dev;
4303         struct cfg80211_connect_params connect;
4304         struct wiphy *wiphy;
4305         struct cfg80211_cached_keys *connkeys = NULL;
4306         int err;
4307
4308         memset(&connect, 0, sizeof(connect));
4309
4310         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4311                 return -EINVAL;
4312
4313         if (!info->attrs[NL80211_ATTR_SSID] ||
4314             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4315                 return -EINVAL;
4316
4317         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4318                 connect.auth_type =
4319                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4320                 if (!nl80211_valid_auth_type(connect.auth_type))
4321                         return -EINVAL;
4322         } else
4323                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4324
4325         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4326
4327         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4328                                       NL80211_MAX_NR_CIPHER_SUITES);
4329         if (err)
4330                 return err;
4331         rtnl_lock();
4332
4333         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4334         if (err)
4335                 goto unlock_rtnl;
4336
4337         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4338             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
4339                 err = -EOPNOTSUPP;
4340                 goto out;
4341         }
4342
4343         if (!netif_running(dev)) {
4344                 err = -ENETDOWN;
4345                 goto out;
4346         }
4347
4348         wiphy = &rdev->wiphy;
4349
4350         if (info->attrs[NL80211_ATTR_MAC])
4351                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4352         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4353         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4354
4355         if (info->attrs[NL80211_ATTR_IE]) {
4356                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4357                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4358         }
4359
4360         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4361                 connect.channel =
4362                         ieee80211_get_channel(wiphy,
4363                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4364                 if (!connect.channel ||
4365                     connect.channel->flags & IEEE80211_CHAN_DISABLED) {
4366                         err = -EINVAL;
4367                         goto out;
4368                 }
4369         }
4370
4371         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4372                 connkeys = nl80211_parse_connkeys(rdev,
4373                                         info->attrs[NL80211_ATTR_KEYS]);
4374                 if (IS_ERR(connkeys)) {
4375                         err = PTR_ERR(connkeys);
4376                         connkeys = NULL;
4377                         goto out;
4378                 }
4379         }
4380
4381         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4382
4383 out:
4384         cfg80211_unlock_rdev(rdev);
4385         dev_put(dev);
4386 unlock_rtnl:
4387         if (err)
4388                 kfree(connkeys);
4389         rtnl_unlock();
4390         return err;
4391 }
4392
4393 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4394 {
4395         struct cfg80211_registered_device *rdev;
4396         struct net_device *dev;
4397         int err;
4398         u16 reason;
4399
4400         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4401                 reason = WLAN_REASON_DEAUTH_LEAVING;
4402         else
4403                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4404
4405         if (reason == 0)
4406                 return -EINVAL;
4407
4408         rtnl_lock();
4409
4410         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4411         if (err)
4412                 goto unlock_rtnl;
4413
4414         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4415             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
4416                 err = -EOPNOTSUPP;
4417                 goto out;
4418         }
4419
4420         if (!netif_running(dev)) {
4421                 err = -ENETDOWN;
4422                 goto out;
4423         }
4424
4425         err = cfg80211_disconnect(rdev, dev, reason, true);
4426
4427 out:
4428         cfg80211_unlock_rdev(rdev);
4429         dev_put(dev);
4430 unlock_rtnl:
4431         rtnl_unlock();
4432         return err;
4433 }
4434
4435 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4436 {
4437         struct cfg80211_registered_device *rdev;
4438         struct net *net;
4439         int err;
4440         u32 pid;
4441
4442         if (!info->attrs[NL80211_ATTR_PID])
4443                 return -EINVAL;
4444
4445         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4446
4447         rtnl_lock();
4448
4449         rdev = cfg80211_get_dev_from_info(info);
4450         if (IS_ERR(rdev)) {
4451                 err = PTR_ERR(rdev);
4452                 goto out_rtnl;
4453         }
4454
4455         net = get_net_ns_by_pid(pid);
4456         if (IS_ERR(net)) {
4457                 err = PTR_ERR(net);
4458                 goto out;
4459         }
4460
4461         err = 0;
4462
4463         /* check if anything to do */
4464         if (net_eq(wiphy_net(&rdev->wiphy), net))
4465                 goto out_put_net;
4466
4467         err = cfg80211_switch_netns(rdev, net);
4468  out_put_net:
4469         put_net(net);
4470  out:
4471         cfg80211_unlock_rdev(rdev);
4472  out_rtnl:
4473         rtnl_unlock();
4474         return err;
4475 }
4476
4477 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4478 {
4479         struct cfg80211_registered_device *rdev;
4480         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4481                         struct cfg80211_pmksa *pmksa) = NULL;
4482         int err;
4483         struct net_device *dev;
4484         struct cfg80211_pmksa pmksa;
4485
4486         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4487
4488         if (!info->attrs[NL80211_ATTR_MAC])
4489                 return -EINVAL;
4490
4491         if (!info->attrs[NL80211_ATTR_PMKID])
4492                 return -EINVAL;
4493
4494         rtnl_lock();
4495
4496         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4497         if (err)
4498                 goto out_rtnl;
4499
4500         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4501         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4502
4503         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4504             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
4505                 err = -EOPNOTSUPP;
4506                 goto out;
4507         }
4508
4509         switch (info->genlhdr->cmd) {
4510         case NL80211_CMD_SET_PMKSA:
4511                 rdev_ops = rdev->ops->set_pmksa;
4512                 break;
4513         case NL80211_CMD_DEL_PMKSA:
4514                 rdev_ops = rdev->ops->del_pmksa;
4515                 break;
4516         default:
4517                 WARN_ON(1);
4518                 break;
4519         }
4520
4521         if (!rdev_ops) {
4522                 err = -EOPNOTSUPP;
4523                 goto out;
4524         }
4525
4526         err = rdev_ops(&rdev->wiphy, dev, &pmksa);
4527
4528  out:
4529         cfg80211_unlock_rdev(rdev);
4530         dev_put(dev);
4531  out_rtnl:
4532         rtnl_unlock();
4533
4534         return err;
4535 }
4536
4537 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4538 {
4539         struct cfg80211_registered_device *rdev;
4540         int err;
4541         struct net_device *dev;
4542
4543         rtnl_lock();
4544
4545         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4546         if (err)
4547                 goto out_rtnl;
4548
4549         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4550             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT) {
4551                 err = -EOPNOTSUPP;
4552                 goto out;
4553         }
4554
4555         if (!rdev->ops->flush_pmksa) {
4556                 err = -EOPNOTSUPP;
4557                 goto out;
4558         }
4559
4560         err = rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4561
4562  out:
4563         cfg80211_unlock_rdev(rdev);
4564         dev_put(dev);
4565  out_rtnl:
4566         rtnl_unlock();
4567
4568         return err;
4569
4570 }
4571
4572 static int nl80211_remain_on_channel(struct sk_buff *skb,
4573                                      struct genl_info *info)
4574 {
4575         struct cfg80211_registered_device *rdev;
4576         struct net_device *dev;
4577         struct ieee80211_channel *chan;
4578         struct sk_buff *msg;
4579         void *hdr;
4580         u64 cookie;
4581         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4582         u32 freq, duration;
4583         int err;
4584
4585         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4586             !info->attrs[NL80211_ATTR_DURATION])
4587                 return -EINVAL;
4588
4589         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4590
4591         /*
4592          * We should be on that channel for at least one jiffie,
4593          * and more than 5 seconds seems excessive.
4594          */
4595         if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
4596                 return -EINVAL;
4597
4598         rtnl_lock();
4599
4600         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4601         if (err)
4602                 goto unlock_rtnl;
4603
4604         if (!rdev->ops->remain_on_channel) {
4605                 err = -EOPNOTSUPP;
4606                 goto out;
4607         }
4608
4609         if (!netif_running(dev)) {
4610                 err = -ENETDOWN;
4611                 goto out;
4612         }
4613
4614         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4615                 channel_type = nla_get_u32(
4616                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4617                 if (channel_type != NL80211_CHAN_NO_HT &&
4618                     channel_type != NL80211_CHAN_HT20 &&
4619                     channel_type != NL80211_CHAN_HT40PLUS &&
4620                     channel_type != NL80211_CHAN_HT40MINUS) {
4621                         err = -EINVAL;
4622                         goto out;
4623                 }
4624         }
4625
4626         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4627         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4628         if (chan == NULL) {
4629                 err = -EINVAL;
4630                 goto out;
4631         }
4632
4633         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4634         if (!msg) {
4635                 err = -ENOMEM;
4636                 goto out;
4637         }
4638
4639         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4640                              NL80211_CMD_REMAIN_ON_CHANNEL);
4641
4642         if (IS_ERR(hdr)) {
4643                 err = PTR_ERR(hdr);
4644                 goto free_msg;
4645         }
4646
4647         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4648                                            channel_type, duration, &cookie);
4649
4650         if (err)
4651                 goto free_msg;
4652
4653         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4654
4655         genlmsg_end(msg, hdr);
4656         err = genlmsg_reply(msg, info);
4657         goto out;
4658
4659  nla_put_failure:
4660         err = -ENOBUFS;
4661  free_msg:
4662         nlmsg_free(msg);
4663  out:
4664         cfg80211_unlock_rdev(rdev);
4665         dev_put(dev);
4666  unlock_rtnl:
4667         rtnl_unlock();
4668         return err;
4669 }
4670
4671 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4672                                             struct genl_info *info)
4673 {
4674         struct cfg80211_registered_device *rdev;
4675         struct net_device *dev;
4676         u64 cookie;
4677         int err;
4678
4679         if (!info->attrs[NL80211_ATTR_COOKIE])
4680                 return -EINVAL;
4681
4682         rtnl_lock();
4683
4684         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4685         if (err)
4686                 goto unlock_rtnl;
4687
4688         if (!rdev->ops->cancel_remain_on_channel) {
4689                 err = -EOPNOTSUPP;
4690                 goto out;
4691         }
4692
4693         if (!netif_running(dev)) {
4694                 err = -ENETDOWN;
4695                 goto out;
4696         }
4697
4698         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4699
4700         err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4701
4702  out:
4703         cfg80211_unlock_rdev(rdev);
4704         dev_put(dev);
4705  unlock_rtnl:
4706         rtnl_unlock();
4707         return err;
4708 }
4709
4710 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4711                            u8 *rates, u8 rates_len)
4712 {
4713         u8 i;
4714         u32 mask = 0;
4715
4716         for (i = 0; i < rates_len; i++) {
4717                 int rate = (rates[i] & 0x7f) * 5;
4718                 int ridx;
4719                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4720                         struct ieee80211_rate *srate =
4721                                 &sband->bitrates[ridx];
4722                         if (rate == srate->bitrate) {
4723                                 mask |= 1 << ridx;
4724                                 break;
4725                         }
4726                 }
4727                 if (ridx == sband->n_bitrates)
4728                         return 0; /* rate not found */
4729         }
4730
4731         return mask;
4732 }
4733
4734 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4735         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4736                                     .len = NL80211_MAX_SUPP_RATES },
4737 };
4738
4739 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4740                                        struct genl_info *info)
4741 {
4742         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4743         struct cfg80211_registered_device *rdev;
4744         struct cfg80211_bitrate_mask mask;
4745         int err, rem, i;
4746         struct net_device *dev;
4747         struct nlattr *tx_rates;
4748         struct ieee80211_supported_band *sband;
4749
4750         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4751                 return -EINVAL;
4752
4753         rtnl_lock();
4754
4755         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4756         if (err)
4757                 goto unlock_rtnl;
4758
4759         if (!rdev->ops->set_bitrate_mask) {
4760                 err = -EOPNOTSUPP;
4761                 goto unlock;
4762         }
4763
4764         memset(&mask, 0, sizeof(mask));
4765         /* Default to all rates enabled */
4766         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4767                 sband = rdev->wiphy.bands[i];
4768                 mask.control[i].legacy =
4769                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4770         }
4771
4772         /*
4773          * The nested attribute uses enum nl80211_band as the index. This maps
4774          * directly to the enum ieee80211_band values used in cfg80211.
4775          */
4776         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4777         {
4778                 enum ieee80211_band band = nla_type(tx_rates);
4779                 if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4780                         err = -EINVAL;
4781                         goto unlock;
4782                 }
4783                 sband = rdev->wiphy.bands[band];
4784                 if (sband == NULL) {
4785                         err = -EINVAL;
4786                         goto unlock;
4787                 }
4788                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4789                           nla_len(tx_rates), nl80211_txattr_policy);
4790                 if (tb[NL80211_TXRATE_LEGACY]) {
4791                         mask.control[band].legacy = rateset_to_mask(
4792                                 sband,
4793                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4794                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4795                         if (mask.control[band].legacy == 0) {
4796                                 err = -EINVAL;
4797                                 goto unlock;
4798                         }
4799                 }
4800         }
4801
4802         err = rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4803
4804  unlock:
4805         dev_put(dev);
4806         cfg80211_unlock_rdev(rdev);
4807  unlock_rtnl:
4808         rtnl_unlock();
4809         return err;
4810 }
4811
4812 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4813 {
4814         struct cfg80211_registered_device *rdev;
4815         struct net_device *dev;
4816         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4817         int err;
4818
4819         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4820                 return -EINVAL;
4821
4822         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4823                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4824
4825         rtnl_lock();
4826
4827         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4828         if (err)
4829                 goto unlock_rtnl;
4830
4831         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4832             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4833             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4834             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4835             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4836             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4837                 err = -EOPNOTSUPP;
4838                 goto out;
4839         }
4840
4841         /* not much point in registering if we can't reply */
4842         if (!rdev->ops->mgmt_tx) {
4843                 err = -EOPNOTSUPP;
4844                 goto out;
4845         }
4846
4847         err = cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4848                         frame_type,
4849                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4850                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4851  out:
4852         cfg80211_unlock_rdev(rdev);
4853         dev_put(dev);
4854  unlock_rtnl:
4855         rtnl_unlock();
4856         return err;
4857 }
4858
4859 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4860 {
4861         struct cfg80211_registered_device *rdev;
4862         struct net_device *dev;
4863         struct ieee80211_channel *chan;
4864         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4865         bool channel_type_valid = false;
4866         u32 freq;
4867         int err;
4868         void *hdr;
4869         u64 cookie;
4870         struct sk_buff *msg;
4871
4872         if (!info->attrs[NL80211_ATTR_FRAME] ||
4873             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4874                 return -EINVAL;
4875
4876         rtnl_lock();
4877
4878         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4879         if (err)
4880                 goto unlock_rtnl;
4881
4882         if (!rdev->ops->mgmt_tx) {
4883                 err = -EOPNOTSUPP;
4884                 goto out;
4885         }
4886
4887         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4888             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4889             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4890             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4891             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4892             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
4893                 err = -EOPNOTSUPP;
4894                 goto out;
4895         }
4896
4897         if (!netif_running(dev)) {
4898                 err = -ENETDOWN;
4899                 goto out;
4900         }
4901
4902         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4903                 channel_type = nla_get_u32(
4904                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4905                 if (channel_type != NL80211_CHAN_NO_HT &&
4906                     channel_type != NL80211_CHAN_HT20 &&
4907                     channel_type != NL80211_CHAN_HT40PLUS &&
4908                     channel_type != NL80211_CHAN_HT40MINUS) {
4909                         err = -EINVAL;
4910                         goto out;
4911                 }
4912                 channel_type_valid = true;
4913         }
4914
4915         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4916         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4917         if (chan == NULL) {
4918                 err = -EINVAL;
4919                 goto out;
4920         }
4921
4922         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4923         if (!msg) {
4924                 err = -ENOMEM;
4925                 goto out;
4926         }
4927
4928         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4929                              NL80211_CMD_FRAME);
4930
4931         if (IS_ERR(hdr)) {
4932                 err = PTR_ERR(hdr);
4933                 goto free_msg;
4934         }
4935         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, channel_type,
4936                                     channel_type_valid,
4937                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4938                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4939                                     &cookie);
4940         if (err)
4941                 goto free_msg;
4942
4943         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4944
4945         genlmsg_end(msg, hdr);
4946         err = genlmsg_reply(msg, info);
4947         goto out;
4948
4949  nla_put_failure:
4950         err = -ENOBUFS;
4951  free_msg:
4952         nlmsg_free(msg);
4953  out:
4954         cfg80211_unlock_rdev(rdev);
4955         dev_put(dev);
4956 unlock_rtnl:
4957         rtnl_unlock();
4958         return err;
4959 }
4960
4961 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
4962 {
4963         struct cfg80211_registered_device *rdev;
4964         struct wireless_dev *wdev;
4965         struct net_device *dev;
4966         u8 ps_state;
4967         bool state;
4968         int err;
4969
4970         if (!info->attrs[NL80211_ATTR_PS_STATE]) {
4971                 err = -EINVAL;
4972                 goto out;
4973         }
4974
4975         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
4976
4977         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED) {
4978                 err = -EINVAL;
4979                 goto out;
4980         }
4981
4982         rtnl_lock();
4983
4984         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
4985         if (err)
4986                 goto unlock_rtnl;
4987
4988         wdev = dev->ieee80211_ptr;
4989
4990         if (!rdev->ops->set_power_mgmt) {
4991                 err = -EOPNOTSUPP;
4992                 goto unlock_rdev;
4993         }
4994
4995         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
4996
4997         if (state == wdev->ps)
4998                 goto unlock_rdev;
4999
5000         wdev->ps = state;
5001
5002         if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, wdev->ps,
5003                                       wdev->ps_timeout))
5004                 /* assume this means it's off */
5005                 wdev->ps = false;
5006
5007 unlock_rdev:
5008         cfg80211_unlock_rdev(rdev);
5009         dev_put(dev);
5010 unlock_rtnl:
5011         rtnl_unlock();
5012
5013 out:
5014         return err;
5015 }
5016
5017 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5018 {
5019         struct cfg80211_registered_device *rdev;
5020         enum nl80211_ps_state ps_state;
5021         struct wireless_dev *wdev;
5022         struct net_device *dev;
5023         struct sk_buff *msg;
5024         void *hdr;
5025         int err;
5026
5027         rtnl_lock();
5028
5029         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5030         if (err)
5031                 goto unlock_rtnl;
5032
5033         wdev = dev->ieee80211_ptr;
5034
5035         if (!rdev->ops->set_power_mgmt) {
5036                 err = -EOPNOTSUPP;
5037                 goto out;
5038         }
5039
5040         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5041         if (!msg) {
5042                 err = -ENOMEM;
5043                 goto out;
5044         }
5045
5046         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5047                              NL80211_CMD_GET_POWER_SAVE);
5048         if (!hdr) {
5049                 err = -ENOMEM;
5050                 goto free_msg;
5051         }
5052
5053         if (wdev->ps)
5054                 ps_state = NL80211_PS_ENABLED;
5055         else
5056                 ps_state = NL80211_PS_DISABLED;
5057
5058         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5059
5060         genlmsg_end(msg, hdr);
5061         err = genlmsg_reply(msg, info);
5062         goto out;
5063
5064 nla_put_failure:
5065         err = -ENOBUFS;
5066
5067 free_msg:
5068         nlmsg_free(msg);
5069
5070 out:
5071         cfg80211_unlock_rdev(rdev);
5072         dev_put(dev);
5073
5074 unlock_rtnl:
5075         rtnl_unlock();
5076
5077         return err;
5078 }
5079
5080 static struct nla_policy
5081 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5082         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5083         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5084         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5085 };
5086
5087 static int nl80211_set_cqm_rssi(struct genl_info *info,
5088                                 s32 threshold, u32 hysteresis)
5089 {
5090         struct cfg80211_registered_device *rdev;
5091         struct wireless_dev *wdev;
5092         struct net_device *dev;
5093         int err;
5094
5095         if (threshold > 0)
5096                 return -EINVAL;
5097
5098         rtnl_lock();
5099
5100         err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5101         if (err)
5102                 goto unlock_rtnl;
5103
5104         wdev = dev->ieee80211_ptr;
5105
5106         if (!rdev->ops->set_cqm_rssi_config) {
5107                 err = -EOPNOTSUPP;
5108                 goto unlock_rdev;
5109         }
5110
5111         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5112             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT) {
5113                 err = -EOPNOTSUPP;
5114                 goto unlock_rdev;
5115         }
5116
5117         err = rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5118                                              threshold, hysteresis);
5119
5120  unlock_rdev:
5121         cfg80211_unlock_rdev(rdev);
5122         dev_put(dev);
5123  unlock_rtnl:
5124         rtnl_unlock();
5125
5126         return err;
5127 }
5128
5129 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5130 {
5131         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5132         struct nlattr *cqm;
5133         int err;
5134
5135         cqm = info->attrs[NL80211_ATTR_CQM];
5136         if (!cqm) {
5137                 err = -EINVAL;
5138                 goto out;
5139         }
5140
5141         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5142                                nl80211_attr_cqm_policy);
5143         if (err)
5144                 goto out;
5145
5146         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5147             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5148                 s32 threshold;
5149                 u32 hysteresis;
5150                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5151                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5152                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5153         } else
5154                 err = -EINVAL;
5155
5156 out:
5157         return err;
5158 }
5159
5160 static struct genl_ops nl80211_ops[] = {
5161         {
5162                 .cmd = NL80211_CMD_GET_WIPHY,
5163                 .doit = nl80211_get_wiphy,
5164                 .dumpit = nl80211_dump_wiphy,
5165                 .policy = nl80211_policy,
5166                 /* can be retrieved by unprivileged users */
5167         },
5168         {
5169                 .cmd = NL80211_CMD_SET_WIPHY,
5170                 .doit = nl80211_set_wiphy,
5171                 .policy = nl80211_policy,
5172                 .flags = GENL_ADMIN_PERM,
5173         },
5174         {
5175                 .cmd = NL80211_CMD_GET_INTERFACE,
5176                 .doit = nl80211_get_interface,
5177                 .dumpit = nl80211_dump_interface,
5178                 .policy = nl80211_policy,
5179                 /* can be retrieved by unprivileged users */
5180         },
5181         {
5182                 .cmd = NL80211_CMD_SET_INTERFACE,
5183                 .doit = nl80211_set_interface,
5184                 .policy = nl80211_policy,
5185                 .flags = GENL_ADMIN_PERM,
5186         },
5187         {
5188                 .cmd = NL80211_CMD_NEW_INTERFACE,
5189                 .doit = nl80211_new_interface,
5190                 .policy = nl80211_policy,
5191                 .flags = GENL_ADMIN_PERM,
5192         },
5193         {
5194                 .cmd = NL80211_CMD_DEL_INTERFACE,
5195                 .doit = nl80211_del_interface,
5196                 .policy = nl80211_policy,
5197                 .flags = GENL_ADMIN_PERM,
5198         },
5199         {
5200                 .cmd = NL80211_CMD_GET_KEY,
5201                 .doit = nl80211_get_key,
5202                 .policy = nl80211_policy,
5203                 .flags = GENL_ADMIN_PERM,
5204         },
5205         {
5206                 .cmd = NL80211_CMD_SET_KEY,
5207                 .doit = nl80211_set_key,
5208                 .policy = nl80211_policy,
5209                 .flags = GENL_ADMIN_PERM,
5210         },
5211         {
5212                 .cmd = NL80211_CMD_NEW_KEY,
5213                 .doit = nl80211_new_key,
5214                 .policy = nl80211_policy,
5215                 .flags = GENL_ADMIN_PERM,
5216         },
5217         {
5218                 .cmd = NL80211_CMD_DEL_KEY,
5219                 .doit = nl80211_del_key,
5220                 .policy = nl80211_policy,
5221                 .flags = GENL_ADMIN_PERM,
5222         },
5223         {
5224                 .cmd = NL80211_CMD_SET_BEACON,
5225                 .policy = nl80211_policy,
5226                 .flags = GENL_ADMIN_PERM,
5227                 .doit = nl80211_addset_beacon,
5228         },
5229         {
5230                 .cmd = NL80211_CMD_NEW_BEACON,
5231                 .policy = nl80211_policy,
5232                 .flags = GENL_ADMIN_PERM,
5233                 .doit = nl80211_addset_beacon,
5234         },
5235         {
5236                 .cmd = NL80211_CMD_DEL_BEACON,
5237                 .policy = nl80211_policy,
5238                 .flags = GENL_ADMIN_PERM,
5239                 .doit = nl80211_del_beacon,
5240         },
5241         {
5242                 .cmd = NL80211_CMD_GET_STATION,
5243                 .doit = nl80211_get_station,
5244                 .dumpit = nl80211_dump_station,
5245                 .policy = nl80211_policy,
5246         },
5247         {
5248                 .cmd = NL80211_CMD_SET_STATION,
5249                 .doit = nl80211_set_station,
5250                 .policy = nl80211_policy,
5251                 .flags = GENL_ADMIN_PERM,
5252         },
5253         {
5254                 .cmd = NL80211_CMD_NEW_STATION,
5255                 .doit = nl80211_new_station,
5256                 .policy = nl80211_policy,
5257                 .flags = GENL_ADMIN_PERM,
5258         },
5259         {
5260                 .cmd = NL80211_CMD_DEL_STATION,
5261                 .doit = nl80211_del_station,
5262                 .policy = nl80211_policy,
5263                 .flags = GENL_ADMIN_PERM,
5264         },
5265         {
5266                 .cmd = NL80211_CMD_GET_MPATH,
5267                 .doit = nl80211_get_mpath,
5268                 .dumpit = nl80211_dump_mpath,
5269                 .policy = nl80211_policy,
5270                 .flags = GENL_ADMIN_PERM,
5271         },
5272         {
5273                 .cmd = NL80211_CMD_SET_MPATH,
5274                 .doit = nl80211_set_mpath,
5275                 .policy = nl80211_policy,
5276                 .flags = GENL_ADMIN_PERM,
5277         },
5278         {
5279                 .cmd = NL80211_CMD_NEW_MPATH,
5280                 .doit = nl80211_new_mpath,
5281                 .policy = nl80211_policy,
5282                 .flags = GENL_ADMIN_PERM,
5283         },
5284         {
5285                 .cmd = NL80211_CMD_DEL_MPATH,
5286                 .doit = nl80211_del_mpath,
5287                 .policy = nl80211_policy,
5288                 .flags = GENL_ADMIN_PERM,
5289         },
5290         {
5291                 .cmd = NL80211_CMD_SET_BSS,
5292                 .doit = nl80211_set_bss,
5293                 .policy = nl80211_policy,
5294                 .flags = GENL_ADMIN_PERM,
5295         },
5296         {
5297                 .cmd = NL80211_CMD_GET_REG,
5298                 .doit = nl80211_get_reg,
5299                 .policy = nl80211_policy,
5300                 /* can be retrieved by unprivileged users */
5301         },
5302         {
5303                 .cmd = NL80211_CMD_SET_REG,
5304                 .doit = nl80211_set_reg,
5305                 .policy = nl80211_policy,
5306                 .flags = GENL_ADMIN_PERM,
5307         },
5308         {
5309                 .cmd = NL80211_CMD_REQ_SET_REG,
5310                 .doit = nl80211_req_set_reg,
5311                 .policy = nl80211_policy,
5312                 .flags = GENL_ADMIN_PERM,
5313         },
5314         {
5315                 .cmd = NL80211_CMD_GET_MESH_PARAMS,
5316                 .doit = nl80211_get_mesh_params,
5317                 .policy = nl80211_policy,
5318                 /* can be retrieved by unprivileged users */
5319         },
5320         {
5321                 .cmd = NL80211_CMD_SET_MESH_PARAMS,
5322                 .doit = nl80211_set_mesh_params,
5323                 .policy = nl80211_policy,
5324                 .flags = GENL_ADMIN_PERM,
5325         },
5326         {
5327                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5328                 .doit = nl80211_trigger_scan,
5329                 .policy = nl80211_policy,
5330                 .flags = GENL_ADMIN_PERM,
5331         },
5332         {
5333                 .cmd = NL80211_CMD_GET_SCAN,
5334                 .policy = nl80211_policy,
5335                 .dumpit = nl80211_dump_scan,
5336         },
5337         {
5338                 .cmd = NL80211_CMD_AUTHENTICATE,
5339                 .doit = nl80211_authenticate,
5340                 .policy = nl80211_policy,
5341                 .flags = GENL_ADMIN_PERM,
5342         },
5343         {
5344                 .cmd = NL80211_CMD_ASSOCIATE,
5345                 .doit = nl80211_associate,
5346                 .policy = nl80211_policy,
5347                 .flags = GENL_ADMIN_PERM,
5348         },
5349         {
5350                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5351                 .doit = nl80211_deauthenticate,
5352                 .policy = nl80211_policy,
5353                 .flags = GENL_ADMIN_PERM,
5354         },
5355         {
5356                 .cmd = NL80211_CMD_DISASSOCIATE,
5357                 .doit = nl80211_disassociate,
5358                 .policy = nl80211_policy,
5359                 .flags = GENL_ADMIN_PERM,
5360         },
5361         {
5362                 .cmd = NL80211_CMD_JOIN_IBSS,
5363                 .doit = nl80211_join_ibss,
5364                 .policy = nl80211_policy,
5365                 .flags = GENL_ADMIN_PERM,
5366         },
5367         {
5368                 .cmd = NL80211_CMD_LEAVE_IBSS,
5369                 .doit = nl80211_leave_ibss,
5370                 .policy = nl80211_policy,
5371                 .flags = GENL_ADMIN_PERM,
5372         },
5373 #ifdef CONFIG_NL80211_TESTMODE
5374         {
5375                 .cmd = NL80211_CMD_TESTMODE,
5376                 .doit = nl80211_testmode_do,
5377                 .policy = nl80211_policy,
5378                 .flags = GENL_ADMIN_PERM,
5379         },
5380 #endif
5381         {
5382                 .cmd = NL80211_CMD_CONNECT,
5383                 .doit = nl80211_connect,
5384                 .policy = nl80211_policy,
5385                 .flags = GENL_ADMIN_PERM,
5386         },
5387         {
5388                 .cmd = NL80211_CMD_DISCONNECT,
5389                 .doit = nl80211_disconnect,
5390                 .policy = nl80211_policy,
5391                 .flags = GENL_ADMIN_PERM,
5392         },
5393         {
5394                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5395                 .doit = nl80211_wiphy_netns,
5396                 .policy = nl80211_policy,
5397                 .flags = GENL_ADMIN_PERM,
5398         },
5399         {
5400                 .cmd = NL80211_CMD_GET_SURVEY,
5401                 .policy = nl80211_policy,
5402                 .dumpit = nl80211_dump_survey,
5403         },
5404         {
5405                 .cmd = NL80211_CMD_SET_PMKSA,
5406                 .doit = nl80211_setdel_pmksa,
5407                 .policy = nl80211_policy,
5408                 .flags = GENL_ADMIN_PERM,
5409         },
5410         {
5411                 .cmd = NL80211_CMD_DEL_PMKSA,
5412                 .doit = nl80211_setdel_pmksa,
5413                 .policy = nl80211_policy,
5414                 .flags = GENL_ADMIN_PERM,
5415         },
5416         {
5417                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5418                 .doit = nl80211_flush_pmksa,
5419                 .policy = nl80211_policy,
5420                 .flags = GENL_ADMIN_PERM,
5421         },
5422         {
5423                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5424                 .doit = nl80211_remain_on_channel,
5425                 .policy = nl80211_policy,
5426                 .flags = GENL_ADMIN_PERM,
5427         },
5428         {
5429                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5430                 .doit = nl80211_cancel_remain_on_channel,
5431                 .policy = nl80211_policy,
5432                 .flags = GENL_ADMIN_PERM,
5433         },
5434         {
5435                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5436                 .doit = nl80211_set_tx_bitrate_mask,
5437                 .policy = nl80211_policy,
5438                 .flags = GENL_ADMIN_PERM,
5439         },
5440         {
5441                 .cmd = NL80211_CMD_REGISTER_FRAME,
5442                 .doit = nl80211_register_mgmt,
5443                 .policy = nl80211_policy,
5444                 .flags = GENL_ADMIN_PERM,
5445         },
5446         {
5447                 .cmd = NL80211_CMD_FRAME,
5448                 .doit = nl80211_tx_mgmt,
5449                 .policy = nl80211_policy,
5450                 .flags = GENL_ADMIN_PERM,
5451         },
5452         {
5453                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5454                 .doit = nl80211_set_power_save,
5455                 .policy = nl80211_policy,
5456                 .flags = GENL_ADMIN_PERM,
5457         },
5458         {
5459                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5460                 .doit = nl80211_get_power_save,
5461                 .policy = nl80211_policy,
5462                 /* can be retrieved by unprivileged users */
5463         },
5464         {
5465                 .cmd = NL80211_CMD_SET_CQM,
5466                 .doit = nl80211_set_cqm,
5467                 .policy = nl80211_policy,
5468                 .flags = GENL_ADMIN_PERM,
5469         },
5470         {
5471                 .cmd = NL80211_CMD_SET_CHANNEL,
5472                 .doit = nl80211_set_channel,
5473                 .policy = nl80211_policy,
5474                 .flags = GENL_ADMIN_PERM,
5475         },
5476 };
5477
5478 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5479         .name = "mlme",
5480 };
5481
5482 /* multicast groups */
5483 static struct genl_multicast_group nl80211_config_mcgrp = {
5484         .name = "config",
5485 };
5486 static struct genl_multicast_group nl80211_scan_mcgrp = {
5487         .name = "scan",
5488 };
5489 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5490         .name = "regulatory",
5491 };
5492
5493 /* notification functions */
5494
5495 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5496 {
5497         struct sk_buff *msg;
5498
5499         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5500         if (!msg)
5501                 return;
5502
5503         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5504                 nlmsg_free(msg);
5505                 return;
5506         }
5507
5508         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5509                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5510 }
5511
5512 static int nl80211_add_scan_req(struct sk_buff *msg,
5513                                 struct cfg80211_registered_device *rdev)
5514 {
5515         struct cfg80211_scan_request *req = rdev->scan_req;
5516         struct nlattr *nest;
5517         int i;
5518
5519         ASSERT_RDEV_LOCK(rdev);
5520
5521         if (WARN_ON(!req))
5522                 return 0;
5523
5524         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5525         if (!nest)
5526                 goto nla_put_failure;
5527         for (i = 0; i < req->n_ssids; i++)
5528                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5529         nla_nest_end(msg, nest);
5530
5531         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5532         if (!nest)
5533                 goto nla_put_failure;
5534         for (i = 0; i < req->n_channels; i++)
5535                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5536         nla_nest_end(msg, nest);
5537
5538         if (req->ie)
5539                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5540
5541         return 0;
5542  nla_put_failure:
5543         return -ENOBUFS;
5544 }
5545
5546 static int nl80211_send_scan_msg(struct sk_buff *msg,
5547                                  struct cfg80211_registered_device *rdev,
5548                                  struct net_device *netdev,
5549                                  u32 pid, u32 seq, int flags,
5550                                  u32 cmd)
5551 {
5552         void *hdr;
5553
5554         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
5555         if (!hdr)
5556                 return -1;
5557
5558         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5559         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5560
5561         /* ignore errors and send incomplete event anyway */
5562         nl80211_add_scan_req(msg, rdev);
5563
5564         return genlmsg_end(msg, hdr);
5565
5566  nla_put_failure:
5567         genlmsg_cancel(msg, hdr);
5568         return -EMSGSIZE;
5569 }
5570
5571 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
5572                              struct net_device *netdev)
5573 {
5574         struct sk_buff *msg;
5575
5576         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5577         if (!msg)
5578                 return;
5579
5580         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5581                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
5582                 nlmsg_free(msg);
5583                 return;
5584         }
5585
5586         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5587                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5588 }
5589
5590 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
5591                             struct net_device *netdev)
5592 {
5593         struct sk_buff *msg;
5594
5595         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5596         if (!msg)
5597                 return;
5598
5599         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5600                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
5601                 nlmsg_free(msg);
5602                 return;
5603         }
5604
5605         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5606                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5607 }
5608
5609 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
5610                                struct net_device *netdev)
5611 {
5612         struct sk_buff *msg;
5613
5614         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5615         if (!msg)
5616                 return;
5617
5618         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
5619                                   NL80211_CMD_SCAN_ABORTED) < 0) {
5620                 nlmsg_free(msg);
5621                 return;
5622         }
5623
5624         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5625                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
5626 }
5627
5628 /*
5629  * This can happen on global regulatory changes or device specific settings
5630  * based on custom world regulatory domains.
5631  */
5632 void nl80211_send_reg_change_event(struct regulatory_request *request)
5633 {
5634         struct sk_buff *msg;
5635         void *hdr;
5636
5637         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5638         if (!msg)
5639                 return;
5640
5641         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
5642         if (!hdr) {
5643                 nlmsg_free(msg);
5644                 return;
5645         }
5646
5647         /* Userspace can always count this one always being set */
5648         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
5649
5650         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
5651                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5652                            NL80211_REGDOM_TYPE_WORLD);
5653         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
5654                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5655                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
5656         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
5657                  request->intersect)
5658                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5659                            NL80211_REGDOM_TYPE_INTERSECTION);
5660         else {
5661                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
5662                            NL80211_REGDOM_TYPE_COUNTRY);
5663                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
5664         }
5665
5666         if (wiphy_idx_valid(request->wiphy_idx))
5667                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
5668
5669         if (genlmsg_end(msg, hdr) < 0) {
5670                 nlmsg_free(msg);
5671                 return;
5672         }
5673
5674         rcu_read_lock();
5675         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
5676                                 GFP_ATOMIC);
5677         rcu_read_unlock();
5678
5679         return;
5680
5681 nla_put_failure:
5682         genlmsg_cancel(msg, hdr);
5683         nlmsg_free(msg);
5684 }
5685
5686 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
5687                                     struct net_device *netdev,
5688                                     const u8 *buf, size_t len,
5689                                     enum nl80211_commands cmd, gfp_t gfp)
5690 {
5691         struct sk_buff *msg;
5692         void *hdr;
5693
5694         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5695         if (!msg)
5696                 return;
5697
5698         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5699         if (!hdr) {
5700                 nlmsg_free(msg);
5701                 return;
5702         }
5703
5704         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5705         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5706         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
5707
5708         if (genlmsg_end(msg, hdr) < 0) {
5709                 nlmsg_free(msg);
5710                 return;
5711         }
5712
5713         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5714                                 nl80211_mlme_mcgrp.id, gfp);
5715         return;
5716
5717  nla_put_failure:
5718         genlmsg_cancel(msg, hdr);
5719         nlmsg_free(msg);
5720 }
5721
5722 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
5723                           struct net_device *netdev, const u8 *buf,
5724                           size_t len, gfp_t gfp)
5725 {
5726         nl80211_send_mlme_event(rdev, netdev, buf, len,
5727                                 NL80211_CMD_AUTHENTICATE, gfp);
5728 }
5729
5730 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
5731                            struct net_device *netdev, const u8 *buf,
5732                            size_t len, gfp_t gfp)
5733 {
5734         nl80211_send_mlme_event(rdev, netdev, buf, len,
5735                                 NL80211_CMD_ASSOCIATE, gfp);
5736 }
5737
5738 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
5739                          struct net_device *netdev, const u8 *buf,
5740                          size_t len, gfp_t gfp)
5741 {
5742         nl80211_send_mlme_event(rdev, netdev, buf, len,
5743                                 NL80211_CMD_DEAUTHENTICATE, gfp);
5744 }
5745
5746 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
5747                            struct net_device *netdev, const u8 *buf,
5748                            size_t len, gfp_t gfp)
5749 {
5750         nl80211_send_mlme_event(rdev, netdev, buf, len,
5751                                 NL80211_CMD_DISASSOCIATE, gfp);
5752 }
5753
5754 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
5755                                       struct net_device *netdev, int cmd,
5756                                       const u8 *addr, gfp_t gfp)
5757 {
5758         struct sk_buff *msg;
5759         void *hdr;
5760
5761         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5762         if (!msg)
5763                 return;
5764
5765         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
5766         if (!hdr) {
5767                 nlmsg_free(msg);
5768                 return;
5769         }
5770
5771         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5772         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5773         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
5774         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5775
5776         if (genlmsg_end(msg, hdr) < 0) {
5777                 nlmsg_free(msg);
5778                 return;
5779         }
5780
5781         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5782                                 nl80211_mlme_mcgrp.id, gfp);
5783         return;
5784
5785  nla_put_failure:
5786         genlmsg_cancel(msg, hdr);
5787         nlmsg_free(msg);
5788 }
5789
5790 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
5791                                struct net_device *netdev, const u8 *addr,
5792                                gfp_t gfp)
5793 {
5794         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
5795                                   addr, gfp);
5796 }
5797
5798 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
5799                                 struct net_device *netdev, const u8 *addr,
5800                                 gfp_t gfp)
5801 {
5802         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
5803                                   addr, gfp);
5804 }
5805
5806 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
5807                                  struct net_device *netdev, const u8 *bssid,
5808                                  const u8 *req_ie, size_t req_ie_len,
5809                                  const u8 *resp_ie, size_t resp_ie_len,
5810                                  u16 status, gfp_t gfp)
5811 {
5812         struct sk_buff *msg;
5813         void *hdr;
5814
5815         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5816         if (!msg)
5817                 return;
5818
5819         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
5820         if (!hdr) {
5821                 nlmsg_free(msg);
5822                 return;
5823         }
5824
5825         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5826         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5827         if (bssid)
5828                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5829         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
5830         if (req_ie)
5831                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5832         if (resp_ie)
5833                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5834
5835         if (genlmsg_end(msg, hdr) < 0) {
5836                 nlmsg_free(msg);
5837                 return;
5838         }
5839
5840         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5841                                 nl80211_mlme_mcgrp.id, gfp);
5842         return;
5843
5844  nla_put_failure:
5845         genlmsg_cancel(msg, hdr);
5846         nlmsg_free(msg);
5847
5848 }
5849
5850 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
5851                          struct net_device *netdev, const u8 *bssid,
5852                          const u8 *req_ie, size_t req_ie_len,
5853                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
5854 {
5855         struct sk_buff *msg;
5856         void *hdr;
5857
5858         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
5859         if (!msg)
5860                 return;
5861
5862         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
5863         if (!hdr) {
5864                 nlmsg_free(msg);
5865                 return;
5866         }
5867
5868         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5869         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5870         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5871         if (req_ie)
5872                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
5873         if (resp_ie)
5874                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
5875
5876         if (genlmsg_end(msg, hdr) < 0) {
5877                 nlmsg_free(msg);
5878                 return;
5879         }
5880
5881         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5882                                 nl80211_mlme_mcgrp.id, gfp);
5883         return;
5884
5885  nla_put_failure:
5886         genlmsg_cancel(msg, hdr);
5887         nlmsg_free(msg);
5888
5889 }
5890
5891 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
5892                                struct net_device *netdev, u16 reason,
5893                                const u8 *ie, size_t ie_len, bool from_ap)
5894 {
5895         struct sk_buff *msg;
5896         void *hdr;
5897
5898         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
5899         if (!msg)
5900                 return;
5901
5902         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
5903         if (!hdr) {
5904                 nlmsg_free(msg);
5905                 return;
5906         }
5907
5908         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5909         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5910         if (from_ap && reason)
5911                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
5912         if (from_ap)
5913                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
5914         if (ie)
5915                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
5916
5917         if (genlmsg_end(msg, hdr) < 0) {
5918                 nlmsg_free(msg);
5919                 return;
5920         }
5921
5922         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5923                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
5924         return;
5925
5926  nla_put_failure:
5927         genlmsg_cancel(msg, hdr);
5928         nlmsg_free(msg);
5929
5930 }
5931
5932 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
5933                              struct net_device *netdev, const u8 *bssid,
5934                              gfp_t gfp)
5935 {
5936         struct sk_buff *msg;
5937         void *hdr;
5938
5939         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5940         if (!msg)
5941                 return;
5942
5943         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
5944         if (!hdr) {
5945                 nlmsg_free(msg);
5946                 return;
5947         }
5948
5949         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5950         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5951         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
5952
5953         if (genlmsg_end(msg, hdr) < 0) {
5954                 nlmsg_free(msg);
5955                 return;
5956         }
5957
5958         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5959                                 nl80211_mlme_mcgrp.id, gfp);
5960         return;
5961
5962  nla_put_failure:
5963         genlmsg_cancel(msg, hdr);
5964         nlmsg_free(msg);
5965 }
5966
5967 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
5968                                  struct net_device *netdev, const u8 *addr,
5969                                  enum nl80211_key_type key_type, int key_id,
5970                                  const u8 *tsc, gfp_t gfp)
5971 {
5972         struct sk_buff *msg;
5973         void *hdr;
5974
5975         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
5976         if (!msg)
5977                 return;
5978
5979         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
5980         if (!hdr) {
5981                 nlmsg_free(msg);
5982                 return;
5983         }
5984
5985         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
5986         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
5987         if (addr)
5988                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
5989         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
5990         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
5991         if (tsc)
5992                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
5993
5994         if (genlmsg_end(msg, hdr) < 0) {
5995                 nlmsg_free(msg);
5996                 return;
5997         }
5998
5999         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6000                                 nl80211_mlme_mcgrp.id, gfp);
6001         return;
6002
6003  nla_put_failure:
6004         genlmsg_cancel(msg, hdr);
6005         nlmsg_free(msg);
6006 }
6007
6008 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
6009                                     struct ieee80211_channel *channel_before,
6010                                     struct ieee80211_channel *channel_after)
6011 {
6012         struct sk_buff *msg;
6013         void *hdr;
6014         struct nlattr *nl_freq;
6015
6016         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
6017         if (!msg)
6018                 return;
6019
6020         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
6021         if (!hdr) {
6022                 nlmsg_free(msg);
6023                 return;
6024         }
6025
6026         /*
6027          * Since we are applying the beacon hint to a wiphy we know its
6028          * wiphy_idx is valid
6029          */
6030         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
6031
6032         /* Before */
6033         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
6034         if (!nl_freq)
6035                 goto nla_put_failure;
6036         if (nl80211_msg_put_channel(msg, channel_before))
6037                 goto nla_put_failure;
6038         nla_nest_end(msg, nl_freq);
6039
6040         /* After */
6041         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
6042         if (!nl_freq)
6043                 goto nla_put_failure;
6044         if (nl80211_msg_put_channel(msg, channel_after))
6045                 goto nla_put_failure;
6046         nla_nest_end(msg, nl_freq);
6047
6048         if (genlmsg_end(msg, hdr) < 0) {
6049                 nlmsg_free(msg);
6050                 return;
6051         }
6052
6053         rcu_read_lock();
6054         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6055                                 GFP_ATOMIC);
6056         rcu_read_unlock();
6057
6058         return;
6059
6060 nla_put_failure:
6061         genlmsg_cancel(msg, hdr);
6062         nlmsg_free(msg);
6063 }
6064
6065 static void nl80211_send_remain_on_chan_event(
6066         int cmd, struct cfg80211_registered_device *rdev,
6067         struct net_device *netdev, u64 cookie,
6068         struct ieee80211_channel *chan,
6069         enum nl80211_channel_type channel_type,
6070         unsigned int duration, gfp_t gfp)
6071 {
6072         struct sk_buff *msg;
6073         void *hdr;
6074
6075         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6076         if (!msg)
6077                 return;
6078
6079         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6080         if (!hdr) {
6081                 nlmsg_free(msg);
6082                 return;
6083         }
6084
6085         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6086         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6087         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
6088         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
6089         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6090
6091         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
6092                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
6093
6094         if (genlmsg_end(msg, hdr) < 0) {
6095                 nlmsg_free(msg);
6096                 return;
6097         }
6098
6099         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6100                                 nl80211_mlme_mcgrp.id, gfp);
6101         return;
6102
6103  nla_put_failure:
6104         genlmsg_cancel(msg, hdr);
6105         nlmsg_free(msg);
6106 }
6107
6108 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
6109                                     struct net_device *netdev, u64 cookie,
6110                                     struct ieee80211_channel *chan,
6111                                     enum nl80211_channel_type channel_type,
6112                                     unsigned int duration, gfp_t gfp)
6113 {
6114         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
6115                                           rdev, netdev, cookie, chan,
6116                                           channel_type, duration, gfp);
6117 }
6118
6119 void nl80211_send_remain_on_channel_cancel(
6120         struct cfg80211_registered_device *rdev, struct net_device *netdev,
6121         u64 cookie, struct ieee80211_channel *chan,
6122         enum nl80211_channel_type channel_type, gfp_t gfp)
6123 {
6124         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6125                                           rdev, netdev, cookie, chan,
6126                                           channel_type, 0, gfp);
6127 }
6128
6129 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
6130                             struct net_device *dev, const u8 *mac_addr,
6131                             struct station_info *sinfo, gfp_t gfp)
6132 {
6133         struct sk_buff *msg;
6134
6135         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6136         if (!msg)
6137                 return;
6138
6139         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6140                 nlmsg_free(msg);
6141                 return;
6142         }
6143
6144         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6145                                 nl80211_mlme_mcgrp.id, gfp);
6146 }
6147
6148 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
6149                       struct net_device *netdev, u32 nlpid,
6150                       int freq, const u8 *buf, size_t len, gfp_t gfp)
6151 {
6152         struct sk_buff *msg;
6153         void *hdr;
6154         int err;
6155
6156         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6157         if (!msg)
6158                 return -ENOMEM;
6159
6160         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
6161         if (!hdr) {
6162                 nlmsg_free(msg);
6163                 return -ENOMEM;
6164         }
6165
6166         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6167         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6168         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6169         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6170
6171         err = genlmsg_end(msg, hdr);
6172         if (err < 0) {
6173                 nlmsg_free(msg);
6174                 return err;
6175         }
6176
6177         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6178         if (err < 0)
6179                 return err;
6180         return 0;
6181
6182  nla_put_failure:
6183         genlmsg_cancel(msg, hdr);
6184         nlmsg_free(msg);
6185         return -ENOBUFS;
6186 }
6187
6188 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
6189                                  struct net_device *netdev, u64 cookie,
6190                                  const u8 *buf, size_t len, bool ack,
6191                                  gfp_t gfp)
6192 {
6193         struct sk_buff *msg;
6194         void *hdr;
6195
6196         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6197         if (!msg)
6198                 return;
6199
6200         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6201         if (!hdr) {
6202                 nlmsg_free(msg);
6203                 return;
6204         }
6205
6206         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6207         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6208         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6209         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6210         if (ack)
6211                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6212
6213         if (genlmsg_end(msg, hdr) < 0) {
6214                 nlmsg_free(msg);
6215                 return;
6216         }
6217
6218         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6219         return;
6220
6221  nla_put_failure:
6222         genlmsg_cancel(msg, hdr);
6223         nlmsg_free(msg);
6224 }
6225
6226 void
6227 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6228                              struct net_device *netdev,
6229                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6230                              gfp_t gfp)
6231 {
6232         struct sk_buff *msg;
6233         struct nlattr *pinfoattr;
6234         void *hdr;
6235
6236         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6237         if (!msg)
6238                 return;
6239
6240         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6241         if (!hdr) {
6242                 nlmsg_free(msg);
6243                 return;
6244         }
6245
6246         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6247         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6248
6249         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6250         if (!pinfoattr)
6251                 goto nla_put_failure;
6252
6253         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6254                     rssi_event);
6255
6256         nla_nest_end(msg, pinfoattr);
6257
6258         if (genlmsg_end(msg, hdr) < 0) {
6259                 nlmsg_free(msg);
6260                 return;
6261         }
6262
6263         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6264                                 nl80211_mlme_mcgrp.id, gfp);
6265         return;
6266
6267  nla_put_failure:
6268         genlmsg_cancel(msg, hdr);
6269         nlmsg_free(msg);
6270 }
6271
6272 static int nl80211_netlink_notify(struct notifier_block * nb,
6273                                   unsigned long state,
6274                                   void *_notify)
6275 {
6276         struct netlink_notify *notify = _notify;
6277         struct cfg80211_registered_device *rdev;
6278         struct wireless_dev *wdev;
6279
6280         if (state != NETLINK_URELEASE)
6281                 return NOTIFY_DONE;
6282
6283         rcu_read_lock();
6284
6285         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6286                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6287                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6288
6289         rcu_read_unlock();
6290
6291         return NOTIFY_DONE;
6292 }
6293
6294 static struct notifier_block nl80211_netlink_notifier = {
6295         .notifier_call = nl80211_netlink_notify,
6296 };
6297
6298 /* initialisation/exit functions */
6299
6300 int nl80211_init(void)
6301 {
6302         int err;
6303
6304         err = genl_register_family_with_ops(&nl80211_fam,
6305                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6306         if (err)
6307                 return err;
6308
6309         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6310         if (err)
6311                 goto err_out;
6312
6313         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6314         if (err)
6315                 goto err_out;
6316
6317         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6318         if (err)
6319                 goto err_out;
6320
6321         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6322         if (err)
6323                 goto err_out;
6324
6325 #ifdef CONFIG_NL80211_TESTMODE
6326         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6327         if (err)
6328                 goto err_out;
6329 #endif
6330
6331         err = netlink_register_notifier(&nl80211_netlink_notifier);
6332         if (err)
6333                 goto err_out;
6334
6335         return 0;
6336  err_out:
6337         genl_unregister_family(&nl80211_fam);
6338         return err;
6339 }
6340
6341 void nl80211_exit(void)
6342 {
6343         netlink_unregister_notifier(&nl80211_netlink_notifier);
6344         genl_unregister_family(&nl80211_fam);
6345 }