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 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  27                             struct genl_info *info);
  28 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  29                               struct genl_info *info);
  30
  31 /* the netlink family */
  32 static struct genl_family nl80211_fam = {
  33         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  34         .name = "nl80211",      /* have users key off the name instead */
  35         .hdrsize = 0,           /* no private header */
  36         .version = 1,           /* no particular meaning now */
  37         .maxattr = NL80211_ATTR_MAX,
  38         .netnsok = true,
  39         .pre_doit = nl80211_pre_doit,
  40         .post_doit = nl80211_post_doit,
  41 };
  42
  43 /* internal helper: get rdev and dev */
  44 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  45                                        struct cfg80211_registered_device **rdev,
  46                                        struct net_device **dev)
  47 {
  48         struct nlattr **attrs = info->attrs;
  49         int ifindex;
  50
  51         if (!attrs[NL80211_ATTR_IFINDEX])
  52                 return -EINVAL;
  53
  54         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  55         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  56         if (!*dev)
  57                 return -ENODEV;
  58
  59         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  60         if (IS_ERR(*rdev)) {
  61                 dev_put(*dev);
  62                 return PTR_ERR(*rdev);
  63         }
  64
  65         return 0;
  66 }
  67
  68 /* policy for the attributes */
  69 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  70         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  71         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  72                                       .len = 20-1 },
  73         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  74         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  75         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  76         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  77         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  78         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  79         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  80         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  81
  82         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  83         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  84         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  85
  86         [NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
  87         [NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
  88
  89         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  90         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  91                                     .len = WLAN_MAX_KEY_LEN },
  92         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  93         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  94         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  95         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
  96         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
  97
  98         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  99         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 100         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 101                                        .len = IEEE80211_MAX_DATA_LEN },
 102         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 103                                        .len = IEEE80211_MAX_DATA_LEN },
 104         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 105         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 106         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 107         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 108                                                .len = NL80211_MAX_SUPP_RATES },
 109         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 110         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 111         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 112         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 113                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 114         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 115
 116         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 117         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 118
 119         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 120         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 121         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 122         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 123                                            .len = NL80211_MAX_SUPP_RATES },
 124         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 125
 126         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 127         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 128
 129         [NL80211_ATTR_HT_CAPABILITY] = { .type = NLA_BINARY,
 130                                          .len = NL80211_HT_CAPABILITY_LEN },
 131
 132         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 133         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 134                               .len = IEEE80211_MAX_DATA_LEN },
 135         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 136         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 137
 138         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 139                                 .len = IEEE80211_MAX_SSID_LEN },
 140         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 141         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 142         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 143         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 144         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 145         [NL80211_ATTR_STA_FLAGS2] = {
 146                 .len = sizeof(struct nl80211_sta_flag_update),
 147         },
 148         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 149         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 150         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 151         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 152         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 153         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 154         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 155         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 156         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 157                                  .len = WLAN_PMKID_LEN },
 158         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 159         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 160         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 161         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 162                                  .len = IEEE80211_MAX_DATA_LEN },
 163         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 164         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 165         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 166         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 167         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 168         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 170         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 171         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 172         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 173         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 174         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 175         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 176         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 177         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 178         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 179 };
 180
 181 /* policy for the key attributes */
 182 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 183         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 184         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 185         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 186         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 187         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 188         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 189         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 190         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 191 };
 192
 193 /* policy for the key default flags */
 194 static const struct nla_policy
 195 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 196         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 197         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 198 };
 199
 200 /* policy for WoWLAN attributes */
 201 static const struct nla_policy
 202 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 203         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 204         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 205         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 206         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 207 };
 208
 209 /* ifidx get helper */
 210 static int nl80211_get_ifidx(struct netlink_callback *cb)
 211 {
 212         int res;
 213
 214         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 215                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 216                           nl80211_policy);
 217         if (res)
 218                 return res;
 219
 220         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 221                 return -EINVAL;
 222
 223         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 224         if (!res)
 225                 return -EINVAL;
 226         return res;
 227 }
 228
 229 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 230                                        struct netlink_callback *cb,
 231                                        struct cfg80211_registered_device **rdev,
 232                                        struct net_device **dev)
 233 {
 234         int ifidx = cb->args[0];
 235         int err;
 236
 237         if (!ifidx)
 238                 ifidx = nl80211_get_ifidx(cb);
 239         if (ifidx < 0)
 240                 return ifidx;
 241
 242         cb->args[0] = ifidx;
 243
 244         rtnl_lock();
 245
 246         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 247         if (!*dev) {
 248                 err = -ENODEV;
 249                 goto out_rtnl;
 250         }
 251
 252         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 253         if (IS_ERR(*rdev)) {
 254                 err = PTR_ERR(*rdev);
 255                 goto out_rtnl;
 256         }
 257
 258         return 0;
 259  out_rtnl:
 260         rtnl_unlock();
 261         return err;
 262 }
 263
 264 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 265 {
 266         cfg80211_unlock_rdev(rdev);
 267         rtnl_unlock();
 268 }
 269
 270 /* IE validation */
 271 static bool is_valid_ie_attr(const struct nlattr *attr)
 272 {
 273         const u8 *pos;
 274         int len;
 275
 276         if (!attr)
 277                 return true;
 278
 279         pos = nla_data(attr);
 280         len = nla_len(attr);
 281
 282         while (len) {
 283                 u8 elemlen;
 284
 285                 if (len < 2)
 286                         return false;
 287                 len -= 2;
 288
 289                 elemlen = pos[1];
 290                 if (elemlen > len)
 291                         return false;
 292
 293                 len -= elemlen;
 294                 pos += 2 + elemlen;
 295         }
 296
 297         return true;
 298 }
 299
 300 /* message building helper */
 301 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 302                                    int flags, u8 cmd)
 303 {
 304         /* since there is no private header just add the generic one */
 305         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 306 }
 307
 308 static int nl80211_msg_put_channel(struct sk_buff *msg,
 309                                    struct ieee80211_channel *chan)
 310 {
 311         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 312                     chan->center_freq);
 313
 314         if (chan->flags & IEEE80211_CHAN_DISABLED)
 315                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 316         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 317                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 318         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 319                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 320         if (chan->flags & IEEE80211_CHAN_RADAR)
 321                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 322
 323         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 324                     DBM_TO_MBM(chan->max_power));
 325
 326         return 0;
 327
 328  nla_put_failure:
 329         return -ENOBUFS;
 330 }
 331
 332 /* netlink command implementations */
 333
 334 struct key_parse {
 335         struct key_params p;
 336         int idx;
 337         int type;
 338         bool def, defmgmt;
 339         bool def_uni, def_multi;
 340 };
 341
 342 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 343 {
 344         struct nlattr *tb[NL80211_KEY_MAX + 1];
 345         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 346                                    nl80211_key_policy);
 347         if (err)
 348                 return err;
 349
 350         k->def = !!tb[NL80211_KEY_DEFAULT];
 351         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 352
 353         if (k->def) {
 354                 k->def_uni = true;
 355                 k->def_multi = true;
 356         }
 357         if (k->defmgmt)
 358                 k->def_multi = true;
 359
 360         if (tb[NL80211_KEY_IDX])
 361                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 362
 363         if (tb[NL80211_KEY_DATA]) {
 364                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 365                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 366         }
 367
 368         if (tb[NL80211_KEY_SEQ]) {
 369                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 370                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 371         }
 372
 373         if (tb[NL80211_KEY_CIPHER])
 374                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 375
 376         if (tb[NL80211_KEY_TYPE]) {
 377                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 378                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 379                         return -EINVAL;
 380         }
 381
 382         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 383                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 384                 int err = nla_parse_nested(kdt,
 385                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 386                                            tb[NL80211_KEY_DEFAULT_TYPES],
 387                                            nl80211_key_default_policy);
 388                 if (err)
 389                         return err;
 390
 391                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 392                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 399 {
 400         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 401                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 402                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 403         }
 404
 405         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 406                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 407                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 408         }
 409
 410         if (info->attrs[NL80211_ATTR_KEY_IDX])
 411                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 412
 413         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 414                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 415
 416         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 417         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 418
 419         if (k->def) {
 420                 k->def_uni = true;
 421                 k->def_multi = true;
 422         }
 423         if (k->defmgmt)
 424                 k->def_multi = true;
 425
 426         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 427                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 428                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 429                         return -EINVAL;
 430         }
 431
 432         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 433                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 434                 int err = nla_parse_nested(
 435                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 436                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 437                                 nl80211_key_default_policy);
 438                 if (err)
 439                         return err;
 440
 441                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 442                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 443         }
 444
 445         return 0;
 446 }
 447
 448 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 449 {
 450         int err;
 451
 452         memset(k, 0, sizeof(*k));
 453         k->idx = -1;
 454         k->type = -1;
 455
 456         if (info->attrs[NL80211_ATTR_KEY])
 457                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 458         else
 459                 err = nl80211_parse_key_old(info, k);
 460
 461         if (err)
 462                 return err;
 463
 464         if (k->def && k->defmgmt)
 465                 return -EINVAL;
 466
 467         if (k->defmgmt) {
 468                 if (k->def_uni || !k->def_multi)
 469                         return -EINVAL;
 470         }
 471
 472         if (k->idx != -1) {
 473                 if (k->defmgmt) {
 474                         if (k->idx < 4 || k->idx > 5)
 475                                 return -EINVAL;
 476                 } else if (k->def) {
 477                         if (k->idx < 0 || k->idx > 3)
 478                                 return -EINVAL;
 479                 } else {
 480                         if (k->idx < 0 || k->idx > 5)
 481                                 return -EINVAL;
 482                 }
 483         }
 484
 485         return 0;
 486 }
 487
 488 static struct cfg80211_cached_keys *
 489 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 490                        struct nlattr *keys)
 491 {
 492         struct key_parse parse;
 493         struct nlattr *key;
 494         struct cfg80211_cached_keys *result;
 495         int rem, err, def = 0;
 496
 497         result = kzalloc(sizeof(*result), GFP_KERNEL);
 498         if (!result)
 499                 return ERR_PTR(-ENOMEM);
 500
 501         result->def = -1;
 502         result->defmgmt = -1;
 503
 504         nla_for_each_nested(key, keys, rem) {
 505                 memset(&parse, 0, sizeof(parse));
 506                 parse.idx = -1;
 507
 508                 err = nl80211_parse_key_new(key, &parse);
 509                 if (err)
 510                         goto error;
 511                 err = -EINVAL;
 512                 if (!parse.p.key)
 513                         goto error;
 514                 if (parse.idx < 0 || parse.idx > 4)
 515                         goto error;
 516                 if (parse.def) {
 517                         if (def)
 518                                 goto error;
 519                         def = 1;
 520                         result->def = parse.idx;
 521                         if (!parse.def_uni || !parse.def_multi)
 522                                 goto error;
 523                 } else if (parse.defmgmt)
 524                         goto error;
 525                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 526                                                      parse.idx, false, NULL);
 527                 if (err)
 528                         goto error;
 529                 result->params[parse.idx].cipher = parse.p.cipher;
 530                 result->params[parse.idx].key_len = parse.p.key_len;
 531                 result->params[parse.idx].key = result->data[parse.idx];
 532                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 533         }
 534
 535         return result;
 536  error:
 537         kfree(result);
 538         return ERR_PTR(err);
 539 }
 540
 541 static int nl80211_key_allowed(struct wireless_dev *wdev)
 542 {
 543         ASSERT_WDEV_LOCK(wdev);
 544
 545         switch (wdev->iftype) {
 546         case NL80211_IFTYPE_AP:
 547         case NL80211_IFTYPE_AP_VLAN:
 548         case NL80211_IFTYPE_P2P_GO:
 549         case NL80211_IFTYPE_MESH_POINT:
 550                 break;
 551         case NL80211_IFTYPE_ADHOC:
 552                 if (!wdev->current_bss)
 553                         return -ENOLINK;
 554                 break;
 555         case NL80211_IFTYPE_STATION:
 556         case NL80211_IFTYPE_P2P_CLIENT:
 557                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 558                         return -ENOLINK;
 559                 break;
 560         default:
 561                 return -EINVAL;
 562         }
 563
 564         return 0;
 565 }
 566
 567 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 568 {
 569         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 570         int i;
 571
 572         if (!nl_modes)
 573                 goto nla_put_failure;
 574
 575         i = 0;
 576         while (ifmodes) {
 577                 if (ifmodes & 1)
 578                         NLA_PUT_FLAG(msg, i);
 579                 ifmodes >>= 1;
 580                 i++;
 581         }
 582
 583         nla_nest_end(msg, nl_modes);
 584         return 0;
 585
 586 nla_put_failure:
 587         return -ENOBUFS;
 588 }
 589
 590 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 591                                           struct sk_buff *msg)
 592 {
 593         struct nlattr *nl_combis;
 594         int i, j;
 595
 596         nl_combis = nla_nest_start(msg,
 597                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 598         if (!nl_combis)
 599                 goto nla_put_failure;
 600
 601         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 602                 const struct ieee80211_iface_combination *c;
 603                 struct nlattr *nl_combi, *nl_limits;
 604
 605                 c = &wiphy->iface_combinations[i];
 606
 607                 nl_combi = nla_nest_start(msg, i + 1);
 608                 if (!nl_combi)
 609                         goto nla_put_failure;
 610
 611                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 612                 if (!nl_limits)
 613                         goto nla_put_failure;
 614
 615                 for (j = 0; j < c->n_limits; j++) {
 616                         struct nlattr *nl_limit;
 617
 618                         nl_limit = nla_nest_start(msg, j + 1);
 619                         if (!nl_limit)
 620                                 goto nla_put_failure;
 621                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 622                                     c->limits[j].max);
 623                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 624                                                 c->limits[j].types))
 625                                 goto nla_put_failure;
 626                         nla_nest_end(msg, nl_limit);
 627                 }
 628
 629                 nla_nest_end(msg, nl_limits);
 630
 631                 if (c->beacon_int_infra_match)
 632                         NLA_PUT_FLAG(msg,
 633                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 634                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 635                             c->num_different_channels);
 636                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 637                             c->max_interfaces);
 638
 639                 nla_nest_end(msg, nl_combi);
 640         }
 641
 642         nla_nest_end(msg, nl_combis);
 643
 644         return 0;
 645 nla_put_failure:
 646         return -ENOBUFS;
 647 }
 648
 649 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 650                               struct cfg80211_registered_device *dev)
 651 {
 652         void *hdr;
 653         struct nlattr *nl_bands, *nl_band;
 654         struct nlattr *nl_freqs, *nl_freq;
 655         struct nlattr *nl_rates, *nl_rate;
 656         struct nlattr *nl_cmds;
 657         enum ieee80211_band band;
 658         struct ieee80211_channel *chan;
 659         struct ieee80211_rate *rate;
 660         int i;
 661         const struct ieee80211_txrx_stypes *mgmt_stypes =
 662                                 dev->wiphy.mgmt_stypes;
 663
 664         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 665         if (!hdr)
 666                 return -1;
 667
 668         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 669         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 670
 671         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 672                     cfg80211_rdev_list_generation);
 673
 674         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 675                    dev->wiphy.retry_short);
 676         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 677                    dev->wiphy.retry_long);
 678         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 679                     dev->wiphy.frag_threshold);
 680         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 681                     dev->wiphy.rts_threshold);
 682         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 683                     dev->wiphy.coverage_class);
 684         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 685                    dev->wiphy.max_scan_ssids);
 686         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 687                     dev->wiphy.max_scan_ie_len);
 688
 689         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 690                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 691         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 692                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 693
 694         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 695                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 696                 dev->wiphy.cipher_suites);
 697
 698         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 699                    dev->wiphy.max_num_pmkids);
 700
 701         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 702                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 703
 704         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 705                     dev->wiphy.available_antennas_tx);
 706         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 707                     dev->wiphy.available_antennas_rx);
 708
 709         if ((dev->wiphy.available_antennas_tx ||
 710              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 711                 u32 tx_ant = 0, rx_ant = 0;
 712                 int res;
 713                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 714                 if (!res) {
 715                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 716                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 717                 }
 718         }
 719
 720         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 721                                 dev->wiphy.interface_modes))
 722                 goto nla_put_failure;
 723
 724         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 725         if (!nl_bands)
 726                 goto nla_put_failure;
 727
 728         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 729                 if (!dev->wiphy.bands[band])
 730                         continue;
 731
 732                 nl_band = nla_nest_start(msg, band);
 733                 if (!nl_band)
 734                         goto nla_put_failure;
 735
 736                 /* add HT info */
 737                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 738                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 739                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 740                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 741                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 742                                 dev->wiphy.bands[band]->ht_cap.cap);
 743                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 744                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 745                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 746                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 747                 }
 748
 749                 /* add frequencies */
 750                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 751                 if (!nl_freqs)
 752                         goto nla_put_failure;
 753
 754                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 755                         nl_freq = nla_nest_start(msg, i);
 756                         if (!nl_freq)
 757                                 goto nla_put_failure;
 758
 759                         chan = &dev->wiphy.bands[band]->channels[i];
 760
 761                         if (nl80211_msg_put_channel(msg, chan))
 762                                 goto nla_put_failure;
 763
 764                         nla_nest_end(msg, nl_freq);
 765                 }
 766
 767                 nla_nest_end(msg, nl_freqs);
 768
 769                 /* add bitrates */
 770                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 771                 if (!nl_rates)
 772                         goto nla_put_failure;
 773
 774                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 775                         nl_rate = nla_nest_start(msg, i);
 776                         if (!nl_rate)
 777                                 goto nla_put_failure;
 778
 779                         rate = &dev->wiphy.bands[band]->bitrates[i];
 780                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 781                                     rate->bitrate);
 782                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 783                                 NLA_PUT_FLAG(msg,
 784                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 785
 786                         nla_nest_end(msg, nl_rate);
 787                 }
 788
 789                 nla_nest_end(msg, nl_rates);
 790
 791                 nla_nest_end(msg, nl_band);
 792         }
 793         nla_nest_end(msg, nl_bands);
 794
 795         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 796         if (!nl_cmds)
 797                 goto nla_put_failure;
 798
 799         i = 0;
 800 #define CMD(op, n)                                              \
 801          do {                                                   \
 802                 if (dev->ops->op) {                             \
 803                         i++;                                    \
 804                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 805                 }                                               \
 806         } while (0)
 807
 808         CMD(add_virtual_intf, NEW_INTERFACE);
 809         CMD(change_virtual_intf, SET_INTERFACE);
 810         CMD(add_key, NEW_KEY);
 811         CMD(add_beacon, NEW_BEACON);
 812         CMD(add_station, NEW_STATION);
 813         CMD(add_mpath, NEW_MPATH);
 814         CMD(update_mesh_config, SET_MESH_CONFIG);
 815         CMD(change_bss, SET_BSS);
 816         CMD(auth, AUTHENTICATE);
 817         CMD(assoc, ASSOCIATE);
 818         CMD(deauth, DEAUTHENTICATE);
 819         CMD(disassoc, DISASSOCIATE);
 820         CMD(join_ibss, JOIN_IBSS);
 821         CMD(join_mesh, JOIN_MESH);
 822         CMD(set_pmksa, SET_PMKSA);
 823         CMD(del_pmksa, DEL_PMKSA);
 824         CMD(flush_pmksa, FLUSH_PMKSA);
 825         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 826         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 827         CMD(mgmt_tx, FRAME);
 828         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 829         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 830                 i++;
 831                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 832         }
 833         CMD(set_channel, SET_CHANNEL);
 834         CMD(set_wds_peer, SET_WDS_PEER);
 835         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 836                 CMD(sched_scan_start, START_SCHED_SCAN);
 837
 838 #undef CMD
 839
 840         if (dev->ops->connect || dev->ops->auth) {
 841                 i++;
 842                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 843         }
 844
 845         if (dev->ops->disconnect || dev->ops->deauth) {
 846                 i++;
 847                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 848         }
 849
 850         nla_nest_end(msg, nl_cmds);
 851
 852         if (dev->ops->remain_on_channel)
 853                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 854                             dev->wiphy.max_remain_on_channel_duration);
 855
 856         /* for now at least assume all drivers have it */
 857         if (dev->ops->mgmt_tx)
 858                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 859
 860         if (mgmt_stypes) {
 861                 u16 stypes;
 862                 struct nlattr *nl_ftypes, *nl_ifs;
 863                 enum nl80211_iftype ift;
 864
 865                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 866                 if (!nl_ifs)
 867                         goto nla_put_failure;
 868
 869                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 870                         nl_ftypes = nla_nest_start(msg, ift);
 871                         if (!nl_ftypes)
 872                                 goto nla_put_failure;
 873                         i = 0;
 874                         stypes = mgmt_stypes[ift].tx;
 875                         while (stypes) {
 876                                 if (stypes & 1)
 877                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 878                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 879                                 stypes >>= 1;
 880                                 i++;
 881                         }
 882                         nla_nest_end(msg, nl_ftypes);
 883                 }
 884
 885                 nla_nest_end(msg, nl_ifs);
 886
 887                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 888                 if (!nl_ifs)
 889                         goto nla_put_failure;
 890
 891                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 892                         nl_ftypes = nla_nest_start(msg, ift);
 893                         if (!nl_ftypes)
 894                                 goto nla_put_failure;
 895                         i = 0;
 896                         stypes = mgmt_stypes[ift].rx;
 897                         while (stypes) {
 898                                 if (stypes & 1)
 899                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 900                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 901                                 stypes >>= 1;
 902                                 i++;
 903                         }
 904                         nla_nest_end(msg, nl_ftypes);
 905                 }
 906                 nla_nest_end(msg, nl_ifs);
 907         }
 908
 909         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 910                 struct nlattr *nl_wowlan;
 911
 912                 nl_wowlan = nla_nest_start(msg,
 913                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 914                 if (!nl_wowlan)
 915                         goto nla_put_failure;
 916
 917                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 918                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 919                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
 920                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 921                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
 922                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
 923                 if (dev->wiphy.wowlan.n_patterns) {
 924                         struct nl80211_wowlan_pattern_support pat = {
 925                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
 926                                 .min_pattern_len =
 927                                         dev->wiphy.wowlan.pattern_min_len,
 928                                 .max_pattern_len =
 929                                         dev->wiphy.wowlan.pattern_max_len,
 930                         };
 931                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 932                                 sizeof(pat), &pat);
 933                 }
 934
 935                 nla_nest_end(msg, nl_wowlan);
 936         }
 937
 938         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
 939                                 dev->wiphy.software_iftypes))
 940                 goto nla_put_failure;
 941
 942         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
 943                 goto nla_put_failure;
 944
 945         return genlmsg_end(msg, hdr);
 946
 947  nla_put_failure:
 948         genlmsg_cancel(msg, hdr);
 949         return -EMSGSIZE;
 950 }
 951
 952 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 953 {
 954         int idx = 0;
 955         int start = cb->args[0];
 956         struct cfg80211_registered_device *dev;
 957
 958         mutex_lock(&cfg80211_mutex);
 959         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
 960                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
 961                         continue;
 962                 if (++idx <= start)
 963                         continue;
 964                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
 965                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
 966                                        dev) < 0) {
 967                         idx--;
 968                         break;
 969                 }
 970         }
 971         mutex_unlock(&cfg80211_mutex);
 972
 973         cb->args[0] = idx;
 974
 975         return skb->len;
 976 }
 977
 978 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 979 {
 980         struct sk_buff *msg;
 981         struct cfg80211_registered_device *dev = info->user_ptr[0];
 982
 983         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 984         if (!msg)
 985                 return -ENOMEM;
 986
 987         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
 988                 nlmsg_free(msg);
 989                 return -ENOBUFS;
 990         }
 991
 992         return genlmsg_reply(msg, info);
 993 }
 994
 995 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
 996         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
 997         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
 998         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
 999         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1000         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1001 };
1002
1003 static int parse_txq_params(struct nlattr *tb[],
1004                             struct ieee80211_txq_params *txq_params)
1005 {
1006         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1007             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1008             !tb[NL80211_TXQ_ATTR_AIFS])
1009                 return -EINVAL;
1010
1011         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1012         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1013         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1014         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1015         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1016
1017         return 0;
1018 }
1019
1020 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1021 {
1022         /*
1023          * You can only set the channel explicitly for AP, mesh
1024          * and WDS type interfaces; all others have their channel
1025          * managed via their respective "establish a connection"
1026          * command (connect, join, ...)
1027          *
1028          * Monitors are special as they are normally slaved to
1029          * whatever else is going on, so they behave as though
1030          * you tried setting the wiphy channel itself.
1031          */
1032         return !wdev ||
1033                 wdev->iftype == NL80211_IFTYPE_AP ||
1034                 wdev->iftype == NL80211_IFTYPE_WDS ||
1035                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1036                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1037                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1038 }
1039
1040 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1041                                  struct wireless_dev *wdev,
1042                                  struct genl_info *info)
1043 {
1044         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1045         u32 freq;
1046         int result;
1047
1048         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1049                 return -EINVAL;
1050
1051         if (!nl80211_can_set_dev_channel(wdev))
1052                 return -EOPNOTSUPP;
1053
1054         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1055                 channel_type = nla_get_u32(info->attrs[
1056                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1057                 if (channel_type != NL80211_CHAN_NO_HT &&
1058                     channel_type != NL80211_CHAN_HT20 &&
1059                     channel_type != NL80211_CHAN_HT40PLUS &&
1060                     channel_type != NL80211_CHAN_HT40MINUS)
1061                         return -EINVAL;
1062         }
1063
1064         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1065
1066         mutex_lock(&rdev->devlist_mtx);
1067         if (wdev) {
1068                 wdev_lock(wdev);
1069                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1070                 wdev_unlock(wdev);
1071         } else {
1072                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1073         }
1074         mutex_unlock(&rdev->devlist_mtx);
1075
1076         return result;
1077 }
1078
1079 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1080 {
1081         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1082         struct net_device *netdev = info->user_ptr[1];
1083
1084         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1085 }
1086
1087 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1088 {
1089         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1090         struct net_device *dev = info->user_ptr[1];
1091         struct wireless_dev *wdev = dev->ieee80211_ptr;
1092         const u8 *bssid;
1093
1094         if (!info->attrs[NL80211_ATTR_MAC])
1095                 return -EINVAL;
1096
1097         if (netif_running(dev))
1098                 return -EBUSY;
1099
1100         if (!rdev->ops->set_wds_peer)
1101                 return -EOPNOTSUPP;
1102
1103         if (wdev->iftype != NL80211_IFTYPE_WDS)
1104                 return -EOPNOTSUPP;
1105
1106         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1107         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1108 }
1109
1110
1111 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1112 {
1113         struct cfg80211_registered_device *rdev;
1114         struct net_device *netdev = NULL;
1115         struct wireless_dev *wdev;
1116         int result = 0, rem_txq_params = 0;
1117         struct nlattr *nl_txq_params;
1118         u32 changed;
1119         u8 retry_short = 0, retry_long = 0;
1120         u32 frag_threshold = 0, rts_threshold = 0;
1121         u8 coverage_class = 0;
1122
1123         /*
1124          * Try to find the wiphy and netdev. Normally this
1125          * function shouldn't need the netdev, but this is
1126          * done for backward compatibility -- previously
1127          * setting the channel was done per wiphy, but now
1128          * it is per netdev. Previous userland like hostapd
1129          * also passed a netdev to set_wiphy, so that it is
1130          * possible to let that go to the right netdev!
1131          */
1132         mutex_lock(&cfg80211_mutex);
1133
1134         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1135                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1136
1137                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1138                 if (netdev && netdev->ieee80211_ptr) {
1139                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1140                         mutex_lock(&rdev->mtx);
1141                 } else
1142                         netdev = NULL;
1143         }
1144
1145         if (!netdev) {
1146                 rdev = __cfg80211_rdev_from_info(info);
1147                 if (IS_ERR(rdev)) {
1148                         mutex_unlock(&cfg80211_mutex);
1149                         return PTR_ERR(rdev);
1150                 }
1151                 wdev = NULL;
1152                 netdev = NULL;
1153                 result = 0;
1154
1155                 mutex_lock(&rdev->mtx);
1156         } else if (netif_running(netdev) &&
1157                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1158                 wdev = netdev->ieee80211_ptr;
1159         else
1160                 wdev = NULL;
1161
1162         /*
1163          * end workaround code, by now the rdev is available
1164          * and locked, and wdev may or may not be NULL.
1165          */
1166
1167         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1168                 result = cfg80211_dev_rename(
1169                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1170
1171         mutex_unlock(&cfg80211_mutex);
1172
1173         if (result)
1174                 goto bad_res;
1175
1176         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1177                 struct ieee80211_txq_params txq_params;
1178                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1179
1180                 if (!rdev->ops->set_txq_params) {
1181                         result = -EOPNOTSUPP;
1182                         goto bad_res;
1183                 }
1184
1185                 nla_for_each_nested(nl_txq_params,
1186                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1187                                     rem_txq_params) {
1188                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1189                                   nla_data(nl_txq_params),
1190                                   nla_len(nl_txq_params),
1191                                   txq_params_policy);
1192                         result = parse_txq_params(tb, &txq_params);
1193                         if (result)
1194                                 goto bad_res;
1195
1196                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1197                                                            &txq_params);
1198                         if (result)
1199                                 goto bad_res;
1200                 }
1201         }
1202
1203         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1204                 result = __nl80211_set_channel(rdev, wdev, info);
1205                 if (result)
1206                         goto bad_res;
1207         }
1208
1209         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1210                 enum nl80211_tx_power_setting type;
1211                 int idx, mbm = 0;
1212
1213                 if (!rdev->ops->set_tx_power) {
1214                         result = -EOPNOTSUPP;
1215                         goto bad_res;
1216                 }
1217
1218                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1219                 type = nla_get_u32(info->attrs[idx]);
1220
1221                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1222                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1223                         result = -EINVAL;
1224                         goto bad_res;
1225                 }
1226
1227                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1228                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1229                         mbm = nla_get_u32(info->attrs[idx]);
1230                 }
1231
1232                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1233                 if (result)
1234                         goto bad_res;
1235         }
1236
1237         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1238             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1239                 u32 tx_ant, rx_ant;
1240                 if ((!rdev->wiphy.available_antennas_tx &&
1241                      !rdev->wiphy.available_antennas_rx) ||
1242                     !rdev->ops->set_antenna) {
1243                         result = -EOPNOTSUPP;
1244                         goto bad_res;
1245                 }
1246
1247                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1248                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1249
1250                 /* reject antenna configurations which don't match the
1251                  * available antenna masks, except for the "all" mask */
1252                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1253                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1254                         result = -EINVAL;
1255                         goto bad_res;
1256                 }
1257
1258                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1259                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1260
1261                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1262                 if (result)
1263                         goto bad_res;
1264         }
1265
1266         changed = 0;
1267
1268         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1269                 retry_short = nla_get_u8(
1270                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1271                 if (retry_short == 0) {
1272                         result = -EINVAL;
1273                         goto bad_res;
1274                 }
1275                 changed |= WIPHY_PARAM_RETRY_SHORT;
1276         }
1277
1278         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1279                 retry_long = nla_get_u8(
1280                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1281                 if (retry_long == 0) {
1282                         result = -EINVAL;
1283                         goto bad_res;
1284                 }
1285                 changed |= WIPHY_PARAM_RETRY_LONG;
1286         }
1287
1288         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1289                 frag_threshold = nla_get_u32(
1290                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1291                 if (frag_threshold < 256) {
1292                         result = -EINVAL;
1293                         goto bad_res;
1294                 }
1295                 if (frag_threshold != (u32) -1) {
1296                         /*
1297                          * Fragments (apart from the last one) are required to
1298                          * have even length. Make the fragmentation code
1299                          * simpler by stripping LSB should someone try to use
1300                          * odd threshold value.
1301                          */
1302                         frag_threshold &= ~0x1;
1303                 }
1304                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1305         }
1306
1307         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1308                 rts_threshold = nla_get_u32(
1309                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1310                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1311         }
1312
1313         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1314                 coverage_class = nla_get_u8(
1315                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1316                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1317         }
1318
1319         if (changed) {
1320                 u8 old_retry_short, old_retry_long;
1321                 u32 old_frag_threshold, old_rts_threshold;
1322                 u8 old_coverage_class;
1323
1324                 if (!rdev->ops->set_wiphy_params) {
1325                         result = -EOPNOTSUPP;
1326                         goto bad_res;
1327                 }
1328
1329                 old_retry_short = rdev->wiphy.retry_short;
1330                 old_retry_long = rdev->wiphy.retry_long;
1331                 old_frag_threshold = rdev->wiphy.frag_threshold;
1332                 old_rts_threshold = rdev->wiphy.rts_threshold;
1333                 old_coverage_class = rdev->wiphy.coverage_class;
1334
1335                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1336                         rdev->wiphy.retry_short = retry_short;
1337                 if (changed & WIPHY_PARAM_RETRY_LONG)
1338                         rdev->wiphy.retry_long = retry_long;
1339                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1340                         rdev->wiphy.frag_threshold = frag_threshold;
1341                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1342                         rdev->wiphy.rts_threshold = rts_threshold;
1343                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1344                         rdev->wiphy.coverage_class = coverage_class;
1345
1346                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1347                 if (result) {
1348                         rdev->wiphy.retry_short = old_retry_short;
1349                         rdev->wiphy.retry_long = old_retry_long;
1350                         rdev->wiphy.frag_threshold = old_frag_threshold;
1351                         rdev->wiphy.rts_threshold = old_rts_threshold;
1352                         rdev->wiphy.coverage_class = old_coverage_class;
1353                 }
1354         }
1355
1356  bad_res:
1357         mutex_unlock(&rdev->mtx);
1358         if (netdev)
1359                 dev_put(netdev);
1360         return result;
1361 }
1362
1363
1364 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1365                               struct cfg80211_registered_device *rdev,
1366                               struct net_device *dev)
1367 {
1368         void *hdr;
1369
1370         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1371         if (!hdr)
1372                 return -1;
1373
1374         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1375         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1376         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1377         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1378
1379         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1380                     rdev->devlist_generation ^
1381                         (cfg80211_rdev_list_generation << 2));
1382
1383         return genlmsg_end(msg, hdr);
1384
1385  nla_put_failure:
1386         genlmsg_cancel(msg, hdr);
1387         return -EMSGSIZE;
1388 }
1389
1390 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1391 {
1392         int wp_idx = 0;
1393         int if_idx = 0;
1394         int wp_start = cb->args[0];
1395         int if_start = cb->args[1];
1396         struct cfg80211_registered_device *rdev;
1397         struct wireless_dev *wdev;
1398
1399         mutex_lock(&cfg80211_mutex);
1400         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1401                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1402                         continue;
1403                 if (wp_idx < wp_start) {
1404                         wp_idx++;
1405                         continue;
1406                 }
1407                 if_idx = 0;
1408
1409                 mutex_lock(&rdev->devlist_mtx);
1410                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1411                         if (if_idx < if_start) {
1412                                 if_idx++;
1413                                 continue;
1414                         }
1415                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1416                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1417                                                rdev, wdev->netdev) < 0) {
1418                                 mutex_unlock(&rdev->devlist_mtx);
1419                                 goto out;
1420                         }
1421                         if_idx++;
1422                 }
1423                 mutex_unlock(&rdev->devlist_mtx);
1424
1425                 wp_idx++;
1426         }
1427  out:
1428         mutex_unlock(&cfg80211_mutex);
1429
1430         cb->args[0] = wp_idx;
1431         cb->args[1] = if_idx;
1432
1433         return skb->len;
1434 }
1435
1436 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1437 {
1438         struct sk_buff *msg;
1439         struct cfg80211_registered_device *dev = info->user_ptr[0];
1440         struct net_device *netdev = info->user_ptr[1];
1441
1442         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1443         if (!msg)
1444                 return -ENOMEM;
1445
1446         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1447                                dev, netdev) < 0) {
1448                 nlmsg_free(msg);
1449                 return -ENOBUFS;
1450         }
1451
1452         return genlmsg_reply(msg, info);
1453 }
1454
1455 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1456         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1457         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1458         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1459         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1460         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1461 };
1462
1463 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1464 {
1465         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1466         int flag;
1467
1468         *mntrflags = 0;
1469
1470         if (!nla)
1471                 return -EINVAL;
1472
1473         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1474                              nla, mntr_flags_policy))
1475                 return -EINVAL;
1476
1477         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1478                 if (flags[flag])
1479                         *mntrflags |= (1<<flag);
1480
1481         return 0;
1482 }
1483
1484 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1485                                struct net_device *netdev, u8 use_4addr,
1486                                enum nl80211_iftype iftype)
1487 {
1488         if (!use_4addr) {
1489                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1490                         return -EBUSY;
1491                 return 0;
1492         }
1493
1494         switch (iftype) {
1495         case NL80211_IFTYPE_AP_VLAN:
1496                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1497                         return 0;
1498                 break;
1499         case NL80211_IFTYPE_STATION:
1500                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1501                         return 0;
1502                 break;
1503         default:
1504                 break;
1505         }
1506
1507         return -EOPNOTSUPP;
1508 }
1509
1510 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1511 {
1512         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1513         struct vif_params params;
1514         int err;
1515         enum nl80211_iftype otype, ntype;
1516         struct net_device *dev = info->user_ptr[1];
1517         u32 _flags, *flags = NULL;
1518         bool change = false;
1519
1520         memset(&params, 0, sizeof(params));
1521
1522         otype = ntype = dev->ieee80211_ptr->iftype;
1523
1524         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1525                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1526                 if (otype != ntype)
1527                         change = true;
1528                 if (ntype > NL80211_IFTYPE_MAX)
1529                         return -EINVAL;
1530         }
1531
1532         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1533                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1534
1535                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1536                         return -EINVAL;
1537                 if (netif_running(dev))
1538                         return -EBUSY;
1539
1540                 wdev_lock(wdev);
1541                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1542                              IEEE80211_MAX_MESH_ID_LEN);
1543                 wdev->mesh_id_up_len =
1544                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1545                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1546                        wdev->mesh_id_up_len);
1547                 wdev_unlock(wdev);
1548         }
1549
1550         if (info->attrs[NL80211_ATTR_4ADDR]) {
1551                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1552                 change = true;
1553                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1554                 if (err)
1555                         return err;
1556         } else {
1557                 params.use_4addr = -1;
1558         }
1559
1560         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1561                 if (ntype != NL80211_IFTYPE_MONITOR)
1562                         return -EINVAL;
1563                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1564                                           &_flags);
1565                 if (err)
1566                         return err;
1567
1568                 flags = &_flags;
1569                 change = true;
1570         }
1571
1572         if (change)
1573                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1574         else
1575                 err = 0;
1576
1577         if (!err && params.use_4addr != -1)
1578                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1579
1580         return err;
1581 }
1582
1583 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1584 {
1585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1586         struct vif_params params;
1587         struct net_device *dev;
1588         int err;
1589         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1590         u32 flags;
1591
1592         memset(&params, 0, sizeof(params));
1593
1594         if (!info->attrs[NL80211_ATTR_IFNAME])
1595                 return -EINVAL;
1596
1597         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1598                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1599                 if (type > NL80211_IFTYPE_MAX)
1600                         return -EINVAL;
1601         }
1602
1603         if (!rdev->ops->add_virtual_intf ||
1604             !(rdev->wiphy.interface_modes & (1 << type)))
1605                 return -EOPNOTSUPP;
1606
1607         if (info->attrs[NL80211_ATTR_4ADDR]) {
1608                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1609                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1610                 if (err)
1611                         return err;
1612         }
1613
1614         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1615                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1616                                   &flags);
1617         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1618                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1619                 type, err ? NULL : &flags, &params);
1620         if (IS_ERR(dev))
1621                 return PTR_ERR(dev);
1622
1623         if (type == NL80211_IFTYPE_MESH_POINT &&
1624             info->attrs[NL80211_ATTR_MESH_ID]) {
1625                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1626
1627                 wdev_lock(wdev);
1628                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1629                              IEEE80211_MAX_MESH_ID_LEN);
1630                 wdev->mesh_id_up_len =
1631                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1632                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1633                        wdev->mesh_id_up_len);
1634                 wdev_unlock(wdev);
1635         }
1636
1637         return 0;
1638 }
1639
1640 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1641 {
1642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1643         struct net_device *dev = info->user_ptr[1];
1644
1645         if (!rdev->ops->del_virtual_intf)
1646                 return -EOPNOTSUPP;
1647
1648         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1649 }
1650
1651 struct get_key_cookie {
1652         struct sk_buff *msg;
1653         int error;
1654         int idx;
1655 };
1656
1657 static void get_key_callback(void *c, struct key_params *params)
1658 {
1659         struct nlattr *key;
1660         struct get_key_cookie *cookie = c;
1661
1662         if (params->key)
1663                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1664                         params->key_len, params->key);
1665
1666         if (params->seq)
1667                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1668                         params->seq_len, params->seq);
1669
1670         if (params->cipher)
1671                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1672                             params->cipher);
1673
1674         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1675         if (!key)
1676                 goto nla_put_failure;
1677
1678         if (params->key)
1679                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1680                         params->key_len, params->key);
1681
1682         if (params->seq)
1683                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1684                         params->seq_len, params->seq);
1685
1686         if (params->cipher)
1687                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1688                             params->cipher);
1689
1690         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1691
1692         nla_nest_end(cookie->msg, key);
1693
1694         return;
1695  nla_put_failure:
1696         cookie->error = 1;
1697 }
1698
1699 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1700 {
1701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1702         int err;
1703         struct net_device *dev = info->user_ptr[1];
1704         u8 key_idx = 0;
1705         const u8 *mac_addr = NULL;
1706         bool pairwise;
1707         struct get_key_cookie cookie = {
1708                 .error = 0,
1709         };
1710         void *hdr;
1711         struct sk_buff *msg;
1712
1713         if (info->attrs[NL80211_ATTR_KEY_IDX])
1714                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1715
1716         if (key_idx > 5)
1717                 return -EINVAL;
1718
1719         if (info->attrs[NL80211_ATTR_MAC])
1720                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1721
1722         pairwise = !!mac_addr;
1723         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1724                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1725                 if (kt >= NUM_NL80211_KEYTYPES)
1726                         return -EINVAL;
1727                 if (kt != NL80211_KEYTYPE_GROUP &&
1728                     kt != NL80211_KEYTYPE_PAIRWISE)
1729                         return -EINVAL;
1730                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1731         }
1732
1733         if (!rdev->ops->get_key)
1734                 return -EOPNOTSUPP;
1735
1736         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1737         if (!msg)
1738                 return -ENOMEM;
1739
1740         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1741                              NL80211_CMD_NEW_KEY);
1742         if (IS_ERR(hdr))
1743                 return PTR_ERR(hdr);
1744
1745         cookie.msg = msg;
1746         cookie.idx = key_idx;
1747
1748         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1749         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1750         if (mac_addr)
1751                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1752
1753         if (pairwise && mac_addr &&
1754             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1755                 return -ENOENT;
1756
1757         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1758                                  mac_addr, &cookie, get_key_callback);
1759
1760         if (err)
1761                 goto free_msg;
1762
1763         if (cookie.error)
1764                 goto nla_put_failure;
1765
1766         genlmsg_end(msg, hdr);
1767         return genlmsg_reply(msg, info);
1768
1769  nla_put_failure:
1770         err = -ENOBUFS;
1771  free_msg:
1772         nlmsg_free(msg);
1773         return err;
1774 }
1775
1776 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1777 {
1778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1779         struct key_parse key;
1780         int err;
1781         struct net_device *dev = info->user_ptr[1];
1782
1783         err = nl80211_parse_key(info, &key);
1784         if (err)
1785                 return err;
1786
1787         if (key.idx < 0)
1788                 return -EINVAL;
1789
1790         /* only support setting default key */
1791         if (!key.def && !key.defmgmt)
1792                 return -EINVAL;
1793
1794         wdev_lock(dev->ieee80211_ptr);
1795
1796         if (key.def) {
1797                 if (!rdev->ops->set_default_key) {
1798                         err = -EOPNOTSUPP;
1799                         goto out;
1800                 }
1801
1802                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1803                 if (err)
1804                         goto out;
1805
1806                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1807                                                  key.def_uni, key.def_multi);
1808
1809                 if (err)
1810                         goto out;
1811
1812 #ifdef CONFIG_CFG80211_WEXT
1813                 dev->ieee80211_ptr->wext.default_key = key.idx;
1814 #endif
1815         } else {
1816                 if (key.def_uni || !key.def_multi) {
1817                         err = -EINVAL;
1818                         goto out;
1819                 }
1820
1821                 if (!rdev->ops->set_default_mgmt_key) {
1822                         err = -EOPNOTSUPP;
1823                         goto out;
1824                 }
1825
1826                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1827                 if (err)
1828                         goto out;
1829
1830                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1831                                                       dev, key.idx);
1832                 if (err)
1833                         goto out;
1834
1835 #ifdef CONFIG_CFG80211_WEXT
1836                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1837 #endif
1838         }
1839
1840  out:
1841         wdev_unlock(dev->ieee80211_ptr);
1842
1843         return err;
1844 }
1845
1846 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1847 {
1848         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1849         int err;
1850         struct net_device *dev = info->user_ptr[1];
1851         struct key_parse key;
1852         const u8 *mac_addr = NULL;
1853
1854         err = nl80211_parse_key(info, &key);
1855         if (err)
1856                 return err;
1857
1858         if (!key.p.key)
1859                 return -EINVAL;
1860
1861         if (info->attrs[NL80211_ATTR_MAC])
1862                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1863
1864         if (key.type == -1) {
1865                 if (mac_addr)
1866                         key.type = NL80211_KEYTYPE_PAIRWISE;
1867                 else
1868                         key.type = NL80211_KEYTYPE_GROUP;
1869         }
1870
1871         /* for now */
1872         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1873             key.type != NL80211_KEYTYPE_GROUP)
1874                 return -EINVAL;
1875
1876         if (!rdev->ops->add_key)
1877                 return -EOPNOTSUPP;
1878
1879         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1880                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1881                                            mac_addr))
1882                 return -EINVAL;
1883
1884         wdev_lock(dev->ieee80211_ptr);
1885         err = nl80211_key_allowed(dev->ieee80211_ptr);
1886         if (!err)
1887                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1888                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1889                                          mac_addr, &key.p);
1890         wdev_unlock(dev->ieee80211_ptr);
1891
1892         return err;
1893 }
1894
1895 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1896 {
1897         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1898         int err;
1899         struct net_device *dev = info->user_ptr[1];
1900         u8 *mac_addr = NULL;
1901         struct key_parse key;
1902
1903         err = nl80211_parse_key(info, &key);
1904         if (err)
1905                 return err;
1906
1907         if (info->attrs[NL80211_ATTR_MAC])
1908                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1909
1910         if (key.type == -1) {
1911                 if (mac_addr)
1912                         key.type = NL80211_KEYTYPE_PAIRWISE;
1913                 else
1914                         key.type = NL80211_KEYTYPE_GROUP;
1915         }
1916
1917         /* for now */
1918         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1919             key.type != NL80211_KEYTYPE_GROUP)
1920                 return -EINVAL;
1921
1922         if (!rdev->ops->del_key)
1923                 return -EOPNOTSUPP;
1924
1925         wdev_lock(dev->ieee80211_ptr);
1926         err = nl80211_key_allowed(dev->ieee80211_ptr);
1927
1928         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
1929             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1930                 err = -ENOENT;
1931
1932         if (!err)
1933                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
1934                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1935                                          mac_addr);
1936
1937 #ifdef CONFIG_CFG80211_WEXT
1938         if (!err) {
1939                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
1940                         dev->ieee80211_ptr->wext.default_key = -1;
1941                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
1942                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
1943         }
1944 #endif
1945         wdev_unlock(dev->ieee80211_ptr);
1946
1947         return err;
1948 }
1949
1950 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
1951 {
1952         int (*call)(struct wiphy *wiphy, struct net_device *dev,
1953                     struct beacon_parameters *info);
1954         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1955         struct net_device *dev = info->user_ptr[1];
1956         struct wireless_dev *wdev = dev->ieee80211_ptr;
1957         struct beacon_parameters params;
1958         int haveinfo = 0, err;
1959
1960         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]))
1961                 return -EINVAL;
1962
1963         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1964             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
1965                 return -EOPNOTSUPP;
1966
1967         memset(&params, 0, sizeof(params));
1968
1969         switch (info->genlhdr->cmd) {
1970         case NL80211_CMD_NEW_BEACON:
1971                 /* these are required for NEW_BEACON */
1972                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
1973                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
1974                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
1975                         return -EINVAL;
1976
1977                 params.interval =
1978                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
1979                 params.dtim_period =
1980                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
1981
1982                 err = cfg80211_validate_beacon_int(rdev, params.interval);
1983                 if (err)
1984                         return err;
1985
1986                 call = rdev->ops->add_beacon;
1987                 break;
1988         case NL80211_CMD_SET_BEACON:
1989                 call = rdev->ops->set_beacon;
1990                 break;
1991         default:
1992                 WARN_ON(1);
1993                 return -EOPNOTSUPP;
1994         }
1995
1996         if (!call)
1997                 return -EOPNOTSUPP;
1998
1999         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2000                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2001                 params.head_len =
2002                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2003                 haveinfo = 1;
2004         }
2005
2006         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2007                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2008                 params.tail_len =
2009                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2010                 haveinfo = 1;
2011         }
2012
2013         if (!haveinfo)
2014                 return -EINVAL;
2015
2016         err = call(&rdev->wiphy, dev, &params);
2017         if (!err && params.interval)
2018                 wdev->beacon_interval = params.interval;
2019         return err;
2020 }
2021
2022 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
2023 {
2024         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2025         struct net_device *dev = info->user_ptr[1];
2026         struct wireless_dev *wdev = dev->ieee80211_ptr;
2027         int err;
2028
2029         if (!rdev->ops->del_beacon)
2030                 return -EOPNOTSUPP;
2031
2032         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2033             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2034                 return -EOPNOTSUPP;
2035
2036         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
2037         if (!err)
2038                 wdev->beacon_interval = 0;
2039         return err;
2040 }
2041
2042 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2043         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2044         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2045         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2046         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2047         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2048 };
2049
2050 static int parse_station_flags(struct genl_info *info,
2051                                struct station_parameters *params)
2052 {
2053         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2054         struct nlattr *nla;
2055         int flag;
2056
2057         /*
2058          * Try parsing the new attribute first so userspace
2059          * can specify both for older kernels.
2060          */
2061         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2062         if (nla) {
2063                 struct nl80211_sta_flag_update *sta_flags;
2064
2065                 sta_flags = nla_data(nla);
2066                 params->sta_flags_mask = sta_flags->mask;
2067                 params->sta_flags_set = sta_flags->set;
2068                 if ((params->sta_flags_mask |
2069                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2070                         return -EINVAL;
2071                 return 0;
2072         }
2073
2074         /* if present, parse the old attribute */
2075
2076         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2077         if (!nla)
2078                 return 0;
2079
2080         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2081                              nla, sta_flags_policy))
2082                 return -EINVAL;
2083
2084         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
2085         params->sta_flags_mask &= ~1;
2086
2087         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2088                 if (flags[flag])
2089                         params->sta_flags_set |= (1<<flag);
2090
2091         return 0;
2092 }
2093
2094 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2095                                  int attr)
2096 {
2097         struct nlattr *rate;
2098         u16 bitrate;
2099
2100         rate = nla_nest_start(msg, attr);
2101         if (!rate)
2102                 goto nla_put_failure;
2103
2104         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2105         bitrate = cfg80211_calculate_bitrate(info);
2106         if (bitrate > 0)
2107                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2108
2109         if (info->flags & RATE_INFO_FLAGS_MCS)
2110                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2111         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2112                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2113         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2114                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2115
2116         nla_nest_end(msg, rate);
2117         return true;
2118
2119 nla_put_failure:
2120         return false;
2121 }
2122
2123 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2124                                 int flags, struct net_device *dev,
2125                                 const u8 *mac_addr, struct station_info *sinfo)
2126 {
2127         void *hdr;
2128         struct nlattr *sinfoattr, *bss_param;
2129
2130         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2131         if (!hdr)
2132                 return -1;
2133
2134         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2135         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2136
2137         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2138
2139         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2140         if (!sinfoattr)
2141                 goto nla_put_failure;
2142         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2143                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2144                             sinfo->connected_time);
2145         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2146                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2147                             sinfo->inactive_time);
2148         if (sinfo->filled & STATION_INFO_RX_BYTES)
2149                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2150                             sinfo->rx_bytes);
2151         if (sinfo->filled & STATION_INFO_TX_BYTES)
2152                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2153                             sinfo->tx_bytes);
2154         if (sinfo->filled & STATION_INFO_LLID)
2155                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2156                             sinfo->llid);
2157         if (sinfo->filled & STATION_INFO_PLID)
2158                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2159                             sinfo->plid);
2160         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2161                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2162                             sinfo->plink_state);
2163         if (sinfo->filled & STATION_INFO_SIGNAL)
2164                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2165                            sinfo->signal);
2166         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2167                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2168                            sinfo->signal_avg);
2169         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2170                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2171                                           NL80211_STA_INFO_TX_BITRATE))
2172                         goto nla_put_failure;
2173         }
2174         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2175                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2176                                           NL80211_STA_INFO_RX_BITRATE))
2177                         goto nla_put_failure;
2178         }
2179         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2180                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2181                             sinfo->rx_packets);
2182         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2183                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2184                             sinfo->tx_packets);
2185         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2186                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2187                             sinfo->tx_retries);
2188         if (sinfo->filled & STATION_INFO_TX_FAILED)
2189                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2190                             sinfo->tx_failed);
2191         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2192                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2193                 if (!bss_param)
2194                         goto nla_put_failure;
2195
2196                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2197                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2198                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2199                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2200                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2201                         NLA_PUT_FLAG(msg,
2202                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2203                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2204                            sinfo->bss_param.dtim_period);
2205                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2206                             sinfo->bss_param.beacon_interval);
2207
2208                 nla_nest_end(msg, bss_param);
2209         }
2210         nla_nest_end(msg, sinfoattr);
2211
2212         return genlmsg_end(msg, hdr);
2213
2214  nla_put_failure:
2215         genlmsg_cancel(msg, hdr);
2216         return -EMSGSIZE;
2217 }
2218
2219 static int nl80211_dump_station(struct sk_buff *skb,
2220                                 struct netlink_callback *cb)
2221 {
2222         struct station_info sinfo;
2223         struct cfg80211_registered_device *dev;
2224         struct net_device *netdev;
2225         u8 mac_addr[ETH_ALEN];
2226         int sta_idx = cb->args[1];
2227         int err;
2228
2229         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2230         if (err)
2231                 return err;
2232
2233         if (!dev->ops->dump_station) {
2234                 err = -EOPNOTSUPP;
2235                 goto out_err;
2236         }
2237
2238         while (1) {
2239                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2240                                              mac_addr, &sinfo);
2241                 if (err == -ENOENT)
2242                         break;
2243                 if (err)
2244                         goto out_err;
2245
2246                 if (nl80211_send_station(skb,
2247                                 NETLINK_CB(cb->skb).pid,
2248                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2249                                 netdev, mac_addr,
2250                                 &sinfo) < 0)
2251                         goto out;
2252
2253                 sta_idx++;
2254         }
2255
2256
2257  out:
2258         cb->args[1] = sta_idx;
2259         err = skb->len;
2260  out_err:
2261         nl80211_finish_netdev_dump(dev);
2262
2263         return err;
2264 }
2265
2266 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2267 {
2268         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2269         struct net_device *dev = info->user_ptr[1];
2270         struct station_info sinfo;
2271         struct sk_buff *msg;
2272         u8 *mac_addr = NULL;
2273         int err;
2274
2275         memset(&sinfo, 0, sizeof(sinfo));
2276
2277         if (!info->attrs[NL80211_ATTR_MAC])
2278                 return -EINVAL;
2279
2280         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2281
2282         if (!rdev->ops->get_station)
2283                 return -EOPNOTSUPP;
2284
2285         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2286         if (err)
2287                 return err;
2288
2289         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2290         if (!msg)
2291                 return -ENOMEM;
2292
2293         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2294                                  dev, mac_addr, &sinfo) < 0) {
2295                 nlmsg_free(msg);
2296                 return -ENOBUFS;
2297         }
2298
2299         return genlmsg_reply(msg, info);
2300 }
2301
2302 /*
2303  * Get vlan interface making sure it is running and on the right wiphy.
2304  */
2305 static int get_vlan(struct genl_info *info,
2306                     struct cfg80211_registered_device *rdev,
2307                     struct net_device **vlan)
2308 {
2309         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2310         *vlan = NULL;
2311
2312         if (vlanattr) {
2313                 *vlan = dev_get_by_index(genl_info_net(info),
2314                                          nla_get_u32(vlanattr));
2315                 if (!*vlan)
2316                         return -ENODEV;
2317                 if (!(*vlan)->ieee80211_ptr)
2318                         return -EINVAL;
2319                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2320                         return -EINVAL;
2321                 if (!netif_running(*vlan))
2322                         return -ENETDOWN;
2323         }
2324         return 0;
2325 }
2326
2327 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2328 {
2329         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2330         int err;
2331         struct net_device *dev = info->user_ptr[1];
2332         struct station_parameters params;
2333         u8 *mac_addr = NULL;
2334
2335         memset(&params, 0, sizeof(params));
2336
2337         params.listen_interval = -1;
2338         params.plink_state = -1;
2339
2340         if (info->attrs[NL80211_ATTR_STA_AID])
2341                 return -EINVAL;
2342
2343         if (!info->attrs[NL80211_ATTR_MAC])
2344                 return -EINVAL;
2345
2346         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2347
2348         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2349                 params.supported_rates =
2350                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2351                 params.supported_rates_len =
2352                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2353         }
2354
2355         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2356                 params.listen_interval =
2357                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2358
2359         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2360                 params.ht_capa =
2361                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2362
2363         if (parse_station_flags(info, &params))
2364                 return -EINVAL;
2365
2366         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2367                 params.plink_action =
2368                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2369
2370         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2371                 params.plink_state =
2372                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2373
2374         err = get_vlan(info, rdev, &params.vlan);
2375         if (err)
2376                 goto out;
2377
2378         /* validate settings */
2379         err = 0;
2380
2381         switch (dev->ieee80211_ptr->iftype) {
2382         case NL80211_IFTYPE_AP:
2383         case NL80211_IFTYPE_AP_VLAN:
2384         case NL80211_IFTYPE_P2P_GO:
2385                 /* disallow mesh-specific things */
2386                 if (params.plink_action)
2387                         err = -EINVAL;
2388                 break;
2389         case NL80211_IFTYPE_P2P_CLIENT:
2390         case NL80211_IFTYPE_STATION:
2391                 /* disallow everything but AUTHORIZED flag */
2392                 if (params.plink_action)
2393                         err = -EINVAL;
2394                 if (params.vlan)
2395                         err = -EINVAL;
2396                 if (params.supported_rates)
2397                         err = -EINVAL;
2398                 if (params.ht_capa)
2399                         err = -EINVAL;
2400                 if (params.listen_interval >= 0)
2401                         err = -EINVAL;
2402                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
2403                         err = -EINVAL;
2404                 break;
2405         case NL80211_IFTYPE_MESH_POINT:
2406                 /* disallow things mesh doesn't support */
2407                 if (params.vlan)
2408                         err = -EINVAL;
2409                 if (params.ht_capa)
2410                         err = -EINVAL;
2411                 if (params.listen_interval >= 0)
2412                         err = -EINVAL;
2413                 if (params.sta_flags_mask &
2414                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2415                                   BIT(NL80211_STA_FLAG_MFP) |
2416                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2417                         err = -EINVAL;
2418                 break;
2419         default:
2420                 err = -EINVAL;
2421         }
2422
2423         if (err)
2424                 goto out;
2425
2426         if (!rdev->ops->change_station) {
2427                 err = -EOPNOTSUPP;
2428                 goto out;
2429         }
2430
2431         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2432
2433  out:
2434         if (params.vlan)
2435                 dev_put(params.vlan);
2436
2437         return err;
2438 }
2439
2440 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2441 {
2442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2443         int err;
2444         struct net_device *dev = info->user_ptr[1];
2445         struct station_parameters params;
2446         u8 *mac_addr = NULL;
2447
2448         memset(&params, 0, sizeof(params));
2449
2450         if (!info->attrs[NL80211_ATTR_MAC])
2451                 return -EINVAL;
2452
2453         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2454                 return -EINVAL;
2455
2456         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2457                 return -EINVAL;
2458
2459         if (!info->attrs[NL80211_ATTR_STA_AID])
2460                 return -EINVAL;
2461
2462         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2463         params.supported_rates =
2464                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2465         params.supported_rates_len =
2466                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2467         params.listen_interval =
2468                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2469
2470         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2471         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2472                 return -EINVAL;
2473
2474         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2475                 params.ht_capa =
2476                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2477
2478         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2479                 params.plink_action =
2480                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2481
2482         if (parse_station_flags(info, &params))
2483                 return -EINVAL;
2484
2485         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2486             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2487             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2488             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2489                 return -EINVAL;
2490
2491         err = get_vlan(info, rdev, &params.vlan);
2492         if (err)
2493                 goto out;
2494
2495         /* validate settings */
2496         err = 0;
2497
2498         if (!rdev->ops->add_station) {
2499                 err = -EOPNOTSUPP;
2500                 goto out;
2501         }
2502
2503         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2504
2505  out:
2506         if (params.vlan)
2507                 dev_put(params.vlan);
2508         return err;
2509 }
2510
2511 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2512 {
2513         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2514         struct net_device *dev = info->user_ptr[1];
2515         u8 *mac_addr = NULL;
2516
2517         if (info->attrs[NL80211_ATTR_MAC])
2518                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2519
2520         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2521             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2522             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2523             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2524                 return -EINVAL;
2525
2526         if (!rdev->ops->del_station)
2527                 return -EOPNOTSUPP;
2528
2529         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2530 }
2531
2532 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2533                                 int flags, struct net_device *dev,
2534                                 u8 *dst, u8 *next_hop,
2535                                 struct mpath_info *pinfo)
2536 {
2537         void *hdr;
2538         struct nlattr *pinfoattr;
2539
2540         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2541         if (!hdr)
2542                 return -1;
2543
2544         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2545         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2546         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2547
2548         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2549
2550         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2551         if (!pinfoattr)
2552                 goto nla_put_failure;
2553         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2554                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2555                             pinfo->frame_qlen);
2556         if (pinfo->filled & MPATH_INFO_SN)
2557                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2558                             pinfo->sn);
2559         if (pinfo->filled & MPATH_INFO_METRIC)
2560                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2561                             pinfo->metric);
2562         if (pinfo->filled & MPATH_INFO_EXPTIME)
2563                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2564                             pinfo->exptime);
2565         if (pinfo->filled & MPATH_INFO_FLAGS)
2566                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2567                             pinfo->flags);
2568         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2569                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2570                             pinfo->discovery_timeout);
2571         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2572                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2573                             pinfo->discovery_retries);
2574
2575         nla_nest_end(msg, pinfoattr);
2576
2577         return genlmsg_end(msg, hdr);
2578
2579  nla_put_failure:
2580         genlmsg_cancel(msg, hdr);
2581         return -EMSGSIZE;
2582 }
2583
2584 static int nl80211_dump_mpath(struct sk_buff *skb,
2585                               struct netlink_callback *cb)
2586 {
2587         struct mpath_info pinfo;
2588         struct cfg80211_registered_device *dev;
2589         struct net_device *netdev;
2590         u8 dst[ETH_ALEN];
2591         u8 next_hop[ETH_ALEN];
2592         int path_idx = cb->args[1];
2593         int err;
2594
2595         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2596         if (err)
2597                 return err;
2598
2599         if (!dev->ops->dump_mpath) {
2600                 err = -EOPNOTSUPP;
2601                 goto out_err;
2602         }
2603
2604         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2605                 err = -EOPNOTSUPP;
2606                 goto out_err;
2607         }
2608
2609         while (1) {
2610                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2611                                            dst, next_hop, &pinfo);
2612                 if (err == -ENOENT)
2613                         break;
2614                 if (err)
2615                         goto out_err;
2616
2617                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2618                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2619                                        netdev, dst, next_hop,
2620                                        &pinfo) < 0)
2621                         goto out;
2622
2623                 path_idx++;
2624         }
2625
2626
2627  out:
2628         cb->args[1] = path_idx;
2629         err = skb->len;
2630  out_err:
2631         nl80211_finish_netdev_dump(dev);
2632         return err;
2633 }
2634
2635 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2636 {
2637         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2638         int err;
2639         struct net_device *dev = info->user_ptr[1];
2640         struct mpath_info pinfo;
2641         struct sk_buff *msg;
2642         u8 *dst = NULL;
2643         u8 next_hop[ETH_ALEN];
2644
2645         memset(&pinfo, 0, sizeof(pinfo));
2646
2647         if (!info->attrs[NL80211_ATTR_MAC])
2648                 return -EINVAL;
2649
2650         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2651
2652         if (!rdev->ops->get_mpath)
2653                 return -EOPNOTSUPP;
2654
2655         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2656                 return -EOPNOTSUPP;
2657
2658         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2659         if (err)
2660                 return err;
2661
2662         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2663         if (!msg)
2664                 return -ENOMEM;
2665
2666         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2667                                  dev, dst, next_hop, &pinfo) < 0) {
2668                 nlmsg_free(msg);
2669                 return -ENOBUFS;
2670         }
2671
2672         return genlmsg_reply(msg, info);
2673 }
2674
2675 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2676 {
2677         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2678         struct net_device *dev = info->user_ptr[1];
2679         u8 *dst = NULL;
2680         u8 *next_hop = NULL;
2681
2682         if (!info->attrs[NL80211_ATTR_MAC])
2683                 return -EINVAL;
2684
2685         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2686                 return -EINVAL;
2687
2688         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2689         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2690
2691         if (!rdev->ops->change_mpath)
2692                 return -EOPNOTSUPP;
2693
2694         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2695                 return -EOPNOTSUPP;
2696
2697         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2698 }
2699
2700 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2701 {
2702         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2703         struct net_device *dev = info->user_ptr[1];
2704         u8 *dst = NULL;
2705         u8 *next_hop = NULL;
2706
2707         if (!info->attrs[NL80211_ATTR_MAC])
2708                 return -EINVAL;
2709
2710         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2711                 return -EINVAL;
2712
2713         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2714         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2715
2716         if (!rdev->ops->add_mpath)
2717                 return -EOPNOTSUPP;
2718
2719         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2720                 return -EOPNOTSUPP;
2721
2722         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2723 }
2724
2725 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2726 {
2727         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2728         struct net_device *dev = info->user_ptr[1];
2729         u8 *dst = NULL;
2730
2731         if (info->attrs[NL80211_ATTR_MAC])
2732                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2733
2734         if (!rdev->ops->del_mpath)
2735                 return -EOPNOTSUPP;
2736
2737         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2738 }
2739
2740 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2741 {
2742         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2743         struct net_device *dev = info->user_ptr[1];
2744         struct bss_parameters params;
2745
2746         memset(&params, 0, sizeof(params));
2747         /* default to not changing parameters */
2748         params.use_cts_prot = -1;
2749         params.use_short_preamble = -1;
2750         params.use_short_slot_time = -1;
2751         params.ap_isolate = -1;
2752         params.ht_opmode = -1;
2753
2754         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2755                 params.use_cts_prot =
2756                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2757         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2758                 params.use_short_preamble =
2759                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2760         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2761                 params.use_short_slot_time =
2762                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2763         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2764                 params.basic_rates =
2765                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2766                 params.basic_rates_len =
2767                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2768         }
2769         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2770                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2771         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2772                 params.ht_opmode =
2773                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2774
2775         if (!rdev->ops->change_bss)
2776                 return -EOPNOTSUPP;
2777
2778         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2779             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2780                 return -EOPNOTSUPP;
2781
2782         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2783 }
2784
2785 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2786         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2787         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2788         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2789         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2790         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2791         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
2792 };
2793
2794 static int parse_reg_rule(struct nlattr *tb[],
2795         struct ieee80211_reg_rule *reg_rule)
2796 {
2797         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
2798         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
2799
2800         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
2801                 return -EINVAL;
2802         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
2803                 return -EINVAL;
2804         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
2805                 return -EINVAL;
2806         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
2807                 return -EINVAL;
2808         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
2809                 return -EINVAL;
2810
2811         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
2812
2813         freq_range->start_freq_khz =
2814                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
2815         freq_range->end_freq_khz =
2816                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
2817         freq_range->max_bandwidth_khz =
2818                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
2819
2820         power_rule->max_eirp =
2821                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
2822
2823         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
2824                 power_rule->max_antenna_gain =
2825                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
2826
2827         return 0;
2828 }
2829
2830 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
2831 {
2832         int r;
2833         char *data = NULL;
2834
2835         /*
2836          * You should only get this when cfg80211 hasn't yet initialized
2837          * completely when built-in to the kernel right between the time
2838          * window between nl80211_init() and regulatory_init(), if that is
2839          * even possible.
2840          */
2841         mutex_lock(&cfg80211_mutex);
2842         if (unlikely(!cfg80211_regdomain)) {
2843                 mutex_unlock(&cfg80211_mutex);
2844                 return -EINPROGRESS;
2845         }
2846         mutex_unlock(&cfg80211_mutex);
2847
2848         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
2849                 return -EINVAL;
2850
2851         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
2852
2853         r = regulatory_hint_user(data);
2854
2855         return r;
2856 }
2857
2858 static int nl80211_get_mesh_config(struct sk_buff *skb,
2859                                    struct genl_info *info)
2860 {
2861         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2862         struct net_device *dev = info->user_ptr[1];
2863         struct wireless_dev *wdev = dev->ieee80211_ptr;
2864         struct mesh_config cur_params;
2865         int err = 0;
2866         void *hdr;
2867         struct nlattr *pinfoattr;
2868         struct sk_buff *msg;
2869
2870         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
2871                 return -EOPNOTSUPP;
2872
2873         if (!rdev->ops->get_mesh_config)
2874                 return -EOPNOTSUPP;
2875
2876         wdev_lock(wdev);
2877         /* If not connected, get default parameters */
2878         if (!wdev->mesh_id_len)
2879                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
2880         else
2881                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
2882                                                  &cur_params);
2883         wdev_unlock(wdev);
2884
2885         if (err)
2886                 return err;
2887
2888         /* Draw up a netlink message to send back */
2889         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2890         if (!msg)
2891                 return -ENOMEM;
2892         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2893                              NL80211_CMD_GET_MESH_CONFIG);
2894         if (!hdr)
2895                 goto out;
2896         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
2897         if (!pinfoattr)
2898                 goto nla_put_failure;
2899         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2900         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
2901                         cur_params.dot11MeshRetryTimeout);
2902         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
2903                         cur_params.dot11MeshConfirmTimeout);
2904         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
2905                         cur_params.dot11MeshHoldingTimeout);
2906         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
2907                         cur_params.dot11MeshMaxPeerLinks);
2908         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
2909                         cur_params.dot11MeshMaxRetries);
2910         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
2911                         cur_params.dot11MeshTTL);
2912         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
2913                         cur_params.element_ttl);
2914         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
2915                         cur_params.auto_open_plinks);
2916         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
2917                         cur_params.dot11MeshHWMPmaxPREQretries);
2918         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
2919                         cur_params.path_refresh_time);
2920         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
2921                         cur_params.min_discovery_timeout);
2922         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
2923                         cur_params.dot11MeshHWMPactivePathTimeout);
2924         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
2925                         cur_params.dot11MeshHWMPpreqMinInterval);
2926         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
2927                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
2928         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
2929                         cur_params.dot11MeshHWMPRootMode);
2930         nla_nest_end(msg, pinfoattr);
2931         genlmsg_end(msg, hdr);
2932         return genlmsg_reply(msg, info);
2933
2934  nla_put_failure:
2935         genlmsg_cancel(msg, hdr);
2936  out:
2937         nlmsg_free(msg);
2938         return -ENOBUFS;
2939 }
2940
2941 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
2942         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
2943         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
2944         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
2945         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
2946         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
2947         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
2948         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
2949         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
2950
2951         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
2952         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
2953         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
2954         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
2955         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
2956         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
2957 };
2958
2959 static const struct nla_policy
2960         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
2961         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
2962         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
2963         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
2964         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
2965                 .len = IEEE80211_MAX_DATA_LEN },
2966         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
2967 };
2968
2969 static int nl80211_parse_mesh_config(struct genl_info *info,
2970                                      struct mesh_config *cfg,
2971                                      u32 *mask_out)
2972 {
2973         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
2974         u32 mask = 0;
2975
2976 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
2977 do {\
2978         if (table[attr_num]) {\
2979                 cfg->param = nla_fn(table[attr_num]); \
2980                 mask |= (1 << (attr_num - 1)); \
2981         } \
2982 } while (0);\
2983
2984
2985         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
2986                 return -EINVAL;
2987         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
2988                              info->attrs[NL80211_ATTR_MESH_CONFIG],
2989                              nl80211_meshconf_params_policy))
2990                 return -EINVAL;
2991
2992         /* This makes sure that there aren't more than 32 mesh config
2993          * parameters (otherwise our bitfield scheme would not work.) */
2994         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
2995
2996         /* Fill in the params struct */
2997         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
2998                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
2999         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3000                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3001         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3002                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3003         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3004                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3005         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3006                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3007         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3008                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3009         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3010                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3011         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3012                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3013         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3014                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3015                         nla_get_u8);
3016         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3017                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3018         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3019                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3020                         nla_get_u16);
3021         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3022                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3023                         nla_get_u32);
3024         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3025                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3026                         nla_get_u16);
3027         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3028                         dot11MeshHWMPnetDiameterTraversalTime,
3029                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3030                         nla_get_u16);
3031         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3032                         dot11MeshHWMPRootMode, mask,
3033                         NL80211_MESHCONF_HWMP_ROOTMODE,
3034                         nla_get_u8);
3035         if (mask_out)
3036                 *mask_out = mask;
3037
3038         return 0;
3039
3040 #undef FILL_IN_MESH_PARAM_IF_SET
3041 }
3042
3043 static int nl80211_parse_mesh_setup(struct genl_info *info,
3044                                      struct mesh_setup *setup)
3045 {
3046         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3047
3048         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3049                 return -EINVAL;
3050         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3051                              info->attrs[NL80211_ATTR_MESH_SETUP],
3052                              nl80211_mesh_setup_params_policy))
3053                 return -EINVAL;
3054
3055         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3056                 setup->path_sel_proto =
3057                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3058                  IEEE80211_PATH_PROTOCOL_VENDOR :
3059                  IEEE80211_PATH_PROTOCOL_HWMP;
3060
3061         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3062                 setup->path_metric =
3063                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3064                  IEEE80211_PATH_METRIC_VENDOR :
3065                  IEEE80211_PATH_METRIC_AIRTIME;
3066
3067
3068         if (tb[NL80211_MESH_SETUP_IE]) {
3069                 struct nlattr *ieattr =
3070                         tb[NL80211_MESH_SETUP_IE];
3071                 if (!is_valid_ie_attr(ieattr))
3072                         return -EINVAL;
3073                 setup->ie = nla_data(ieattr);
3074                 setup->ie_len = nla_len(ieattr);
3075         }
3076         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3077         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3078
3079         return 0;
3080 }
3081
3082 static int nl80211_update_mesh_config(struct sk_buff *skb,
3083                                       struct genl_info *info)
3084 {
3085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3086         struct net_device *dev = info->user_ptr[1];
3087         struct wireless_dev *wdev = dev->ieee80211_ptr;
3088         struct mesh_config cfg;
3089         u32 mask;
3090         int err;
3091
3092         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3093                 return -EOPNOTSUPP;
3094
3095         if (!rdev->ops->update_mesh_config)
3096                 return -EOPNOTSUPP;
3097
3098         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3099         if (err)
3100                 return err;
3101
3102         wdev_lock(wdev);
3103         if (!wdev->mesh_id_len)
3104                 err = -ENOLINK;
3105
3106         if (!err)
3107                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3108                                                     mask, &cfg);
3109
3110         wdev_unlock(wdev);
3111
3112         return err;
3113 }
3114
3115 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3116 {
3117         struct sk_buff *msg;
3118         void *hdr = NULL;
3119         struct nlattr *nl_reg_rules;
3120         unsigned int i;
3121         int err = -EINVAL;
3122
3123         mutex_lock(&cfg80211_mutex);
3124
3125         if (!cfg80211_regdomain)
3126                 goto out;
3127
3128         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3129         if (!msg) {
3130                 err = -ENOBUFS;
3131                 goto out;
3132         }
3133
3134         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3135                              NL80211_CMD_GET_REG);
3136         if (!hdr)
3137                 goto put_failure;
3138
3139         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3140                 cfg80211_regdomain->alpha2);
3141
3142         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3143         if (!nl_reg_rules)
3144                 goto nla_put_failure;
3145
3146         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3147                 struct nlattr *nl_reg_rule;
3148                 const struct ieee80211_reg_rule *reg_rule;
3149                 const struct ieee80211_freq_range *freq_range;
3150                 const struct ieee80211_power_rule *power_rule;
3151
3152                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3153                 freq_range = &reg_rule->freq_range;
3154                 power_rule = &reg_rule->power_rule;
3155
3156                 nl_reg_rule = nla_nest_start(msg, i);
3157                 if (!nl_reg_rule)
3158                         goto nla_put_failure;
3159
3160                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3161                         reg_rule->flags);
3162                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3163                         freq_range->start_freq_khz);
3164                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3165                         freq_range->end_freq_khz);
3166                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3167                         freq_range->max_bandwidth_khz);
3168                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3169                         power_rule->max_antenna_gain);
3170                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3171                         power_rule->max_eirp);
3172
3173                 nla_nest_end(msg, nl_reg_rule);
3174         }
3175
3176         nla_nest_end(msg, nl_reg_rules);
3177
3178         genlmsg_end(msg, hdr);
3179         err = genlmsg_reply(msg, info);
3180         goto out;
3181
3182 nla_put_failure:
3183         genlmsg_cancel(msg, hdr);
3184 put_failure:
3185         nlmsg_free(msg);
3186         err = -EMSGSIZE;
3187 out:
3188         mutex_unlock(&cfg80211_mutex);
3189         return err;
3190 }
3191
3192 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3193 {
3194         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3195         struct nlattr *nl_reg_rule;
3196         char *alpha2 = NULL;
3197         int rem_reg_rules = 0, r = 0;
3198         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3199         struct ieee80211_regdomain *rd = NULL;
3200
3201         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3202                 return -EINVAL;
3203
3204         if (!info->attrs[NL80211_ATTR_REG_RULES])
3205                 return -EINVAL;
3206
3207         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3208
3209         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3210                         rem_reg_rules) {
3211                 num_rules++;
3212                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3213                         return -EINVAL;
3214         }
3215
3216         mutex_lock(&cfg80211_mutex);
3217
3218         if (!reg_is_valid_request(alpha2)) {
3219                 r = -EINVAL;
3220                 goto bad_reg;
3221         }
3222
3223         size_of_regd = sizeof(struct ieee80211_regdomain) +
3224                 (num_rules * sizeof(struct ieee80211_reg_rule));
3225
3226         rd = kzalloc(size_of_regd, GFP_KERNEL);
3227         if (!rd) {
3228                 r = -ENOMEM;
3229                 goto bad_reg;
3230         }
3231
3232         rd->n_reg_rules = num_rules;
3233         rd->alpha2[0] = alpha2[0];
3234         rd->alpha2[1] = alpha2[1];
3235
3236         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3237                         rem_reg_rules) {
3238                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3239                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3240                         reg_rule_policy);
3241                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3242                 if (r)
3243                         goto bad_reg;
3244
3245                 rule_idx++;
3246
3247                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3248                         r = -EINVAL;
3249                         goto bad_reg;
3250                 }
3251         }
3252
3253         BUG_ON(rule_idx != num_rules);
3254
3255         r = set_regdom(rd);
3256
3257         mutex_unlock(&cfg80211_mutex);
3258
3259         return r;
3260
3261  bad_reg:
3262         mutex_unlock(&cfg80211_mutex);
3263         kfree(rd);
3264         return r;
3265 }
3266
3267 static int validate_scan_freqs(struct nlattr *freqs)
3268 {
3269         struct nlattr *attr1, *attr2;
3270         int n_channels = 0, tmp1, tmp2;
3271
3272         nla_for_each_nested(attr1, freqs, tmp1) {
3273                 n_channels++;
3274                 /*
3275                  * Some hardware has a limited channel list for
3276                  * scanning, and it is pretty much nonsensical
3277                  * to scan for a channel twice, so disallow that
3278                  * and don't require drivers to check that the
3279                  * channel list they get isn't longer than what
3280                  * they can scan, as long as they can scan all
3281                  * the channels they registered at once.
3282                  */
3283                 nla_for_each_nested(attr2, freqs, tmp2)
3284                         if (attr1 != attr2 &&
3285                             nla_get_u32(attr1) == nla_get_u32(attr2))
3286                                 return 0;
3287         }
3288
3289         return n_channels;
3290 }
3291
3292 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3293 {
3294         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3295         struct net_device *dev = info->user_ptr[1];
3296         struct cfg80211_scan_request *request;
3297         struct nlattr *attr;
3298         struct wiphy *wiphy;
3299         int err, tmp, n_ssids = 0, n_channels, i;
3300         enum ieee80211_band band;
3301         size_t ie_len;
3302
3303         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3304                 return -EINVAL;
3305
3306         wiphy = &rdev->wiphy;
3307
3308         if (!rdev->ops->scan)
3309                 return -EOPNOTSUPP;
3310
3311         if (rdev->scan_req)
3312                 return -EBUSY;
3313
3314         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3315                 n_channels = validate_scan_freqs(
3316                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3317                 if (!n_channels)
3318                         return -EINVAL;
3319         } else {
3320                 n_channels = 0;
3321
3322                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3323                         if (wiphy->bands[band])
3324                                 n_channels += wiphy->bands[band]->n_channels;
3325         }
3326
3327         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3328                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3329                         n_ssids++;
3330
3331         if (n_ssids > wiphy->max_scan_ssids)
3332                 return -EINVAL;
3333
3334         if (info->attrs[NL80211_ATTR_IE])
3335                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3336         else
3337                 ie_len = 0;
3338
3339         if (ie_len > wiphy->max_scan_ie_len)
3340                 return -EINVAL;
3341
3342         request = kzalloc(sizeof(*request)
3343                         + sizeof(*request->ssids) * n_ssids
3344                         + sizeof(*request->channels) * n_channels
3345                         + ie_len, GFP_KERNEL);
3346         if (!request)
3347                 return -ENOMEM;
3348
3349         if (n_ssids)
3350                 request->ssids = (void *)&request->channels[n_channels];
3351         request->n_ssids = n_ssids;
3352         if (ie_len) {
3353                 if (request->ssids)
3354                         request->ie = (void *)(request->ssids + n_ssids);
3355                 else
3356                         request->ie = (void *)(request->channels + n_channels);
3357         }
3358
3359         i = 0;
3360         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3361                 /* user specified, bail out if channel not found */
3362                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3363                         struct ieee80211_channel *chan;
3364
3365                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3366
3367                         if (!chan) {
3368                                 err = -EINVAL;
3369                                 goto out_free;
3370                         }
3371
3372                         /* ignore disabled channels */
3373                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3374                                 continue;
3375
3376                         request->channels[i] = chan;
3377                         i++;
3378                 }
3379         } else {
3380                 /* all channels */
3381                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3382                         int j;
3383                         if (!wiphy->bands[band])
3384                                 continue;
3385                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3386                                 struct ieee80211_channel *chan;
3387
3388                                 chan = &wiphy->bands[band]->channels[j];
3389
3390                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3391                                         continue;
3392
3393                                 request->channels[i] = chan;
3394                                 i++;
3395                         }
3396                 }
3397         }
3398
3399         if (!i) {
3400                 err = -EINVAL;
3401                 goto out_free;
3402         }
3403
3404         request->n_channels = i;
3405
3406         i = 0;
3407         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3408                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3409                         request->ssids[i].ssid_len = nla_len(attr);
3410                         if (request->ssids[i].ssid_len > IEEE80211_MAX_SSID_LEN) {
3411                                 err = -EINVAL;
3412                                 goto out_free;
3413                         }
3414                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3415                         i++;
3416                 }
3417         }
3418
3419         if (info->attrs[NL80211_ATTR_IE]) {
3420                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3421                 memcpy((void *)request->ie,
3422                        nla_data(info->attrs[NL80211_ATTR_IE]),
3423                        request->ie_len);
3424         }
3425
3426         request->dev = dev;
3427         request->wiphy = &rdev->wiphy;
3428
3429         rdev->scan_req = request;
3430         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3431
3432         if (!err) {
3433                 nl80211_send_scan_start(rdev, dev);
3434                 dev_hold(dev);
3435         } else {
3436  out_free:
3437                 rdev->scan_req = NULL;
3438                 kfree(request);
3439         }
3440
3441         return err;
3442 }
3443
3444 static int nl80211_start_sched_scan(struct sk_buff *skb,
3445                                     struct genl_info *info)
3446 {
3447         struct cfg80211_sched_scan_request *request;
3448         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3449         struct net_device *dev = info->user_ptr[1];
3450         struct nlattr *attr;
3451         struct wiphy *wiphy;
3452         int err, tmp, n_ssids = 0, n_channels, i;
3453         u32 interval;
3454         enum ieee80211_band band;
3455         size_t ie_len;
3456
3457         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3458             !rdev->ops->sched_scan_start)
3459                 return -EOPNOTSUPP;
3460
3461         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3462                 return -EINVAL;
3463
3464         if (rdev->sched_scan_req)
3465                 return -EINPROGRESS;
3466
3467         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3468                 return -EINVAL;
3469
3470         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3471         if (interval == 0)
3472                 return -EINVAL;
3473
3474         wiphy = &rdev->wiphy;
3475
3476         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3477                 n_channels = validate_scan_freqs(
3478                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3479                 if (!n_channels)
3480                         return -EINVAL;
3481         } else {
3482                 n_channels = 0;
3483
3484                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3485                         if (wiphy->bands[band])
3486                                 n_channels += wiphy->bands[band]->n_channels;
3487         }
3488
3489         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3490                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3491                                     tmp)
3492                         n_ssids++;
3493
3494         if (n_ssids > wiphy->max_scan_ssids)
3495                 return -EINVAL;
3496
3497         if (info->attrs[NL80211_ATTR_IE])
3498                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3499         else
3500                 ie_len = 0;
3501
3502         if (ie_len > wiphy->max_scan_ie_len)
3503                 return -EINVAL;
3504
3505         request = kzalloc(sizeof(*request)
3506                         + sizeof(*request->ssids) * n_ssids
3507                         + sizeof(*request->channels) * n_channels
3508                         + ie_len, GFP_KERNEL);
3509         if (!request)
3510                 return -ENOMEM;
3511
3512         if (n_ssids)
3513                 request->ssids = (void *)&request->channels[n_channels];
3514         request->n_ssids = n_ssids;
3515         if (ie_len) {
3516                 if (request->ssids)
3517                         request->ie = (void *)(request->ssids + n_ssids);
3518                 else
3519                         request->ie = (void *)(request->channels + n_channels);
3520         }
3521
3522         i = 0;
3523         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3524                 /* user specified, bail out if channel not found */
3525                 nla_for_each_nested(attr,
3526                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3527                                     tmp) {
3528                         struct ieee80211_channel *chan;
3529
3530                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3531
3532                         if (!chan) {
3533                                 err = -EINVAL;
3534                                 goto out_free;
3535                         }
3536
3537                         /* ignore disabled channels */
3538                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3539                                 continue;
3540
3541                         request->channels[i] = chan;
3542                         i++;
3543                 }
3544         } else {
3545                 /* all channels */
3546                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3547                         int j;
3548                         if (!wiphy->bands[band])
3549                                 continue;
3550                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3551                                 struct ieee80211_channel *chan;
3552
3553                                 chan = &wiphy->bands[band]->channels[j];
3554
3555                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3556                                         continue;
3557
3558                                 request->channels[i] = chan;
3559                                 i++;
3560                         }
3561                 }
3562         }
3563
3564         if (!i) {
3565                 err = -EINVAL;
3566                 goto out_free;
3567         }
3568
3569         request->n_channels = i;
3570
3571         i = 0;
3572         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3573                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3574                                     tmp) {
3575                         request->ssids[i].ssid_len = nla_len(attr);
3576                         if (request->ssids[i].ssid_len >
3577                             IEEE80211_MAX_SSID_LEN) {
3578                                 err = -EINVAL;
3579                                 goto out_free;
3580                         }
3581                         memcpy(request->ssids[i].ssid, nla_data(attr),
3582                                nla_len(attr));
3583                         i++;
3584                 }
3585         }
3586
3587         if (info->attrs[NL80211_ATTR_IE]) {
3588                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3589                 memcpy((void *)request->ie,
3590                        nla_data(info->attrs[NL80211_ATTR_IE]),
3591                        request->ie_len);
3592         }
3593
3594         request->dev = dev;
3595         request->wiphy = &rdev->wiphy;
3596         request->interval = interval;
3597
3598         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
3599         if (!err) {
3600                 rdev->sched_scan_req = request;
3601                 nl80211_send_sched_scan(rdev, dev,
3602                                         NL80211_CMD_START_SCHED_SCAN);
3603                 goto out;
3604         }
3605
3606 out_free:
3607         kfree(request);
3608 out:
3609         return err;
3610 }
3611
3612 static int nl80211_stop_sched_scan(struct sk_buff *skb,
3613                                    struct genl_info *info)
3614 {
3615         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3616
3617         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3618             !rdev->ops->sched_scan_stop)
3619                 return -EOPNOTSUPP;
3620
3621         return __cfg80211_stop_sched_scan(rdev, false);
3622 }
3623
3624 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,
3625                             struct cfg80211_registered_device *rdev,
3626                             struct wireless_dev *wdev,
3627                             struct cfg80211_internal_bss *intbss)
3628 {
3629         struct cfg80211_bss *res = &intbss->pub;
3630         void *hdr;
3631         struct nlattr *bss;
3632         int i;
3633
3634         ASSERT_WDEV_LOCK(wdev);
3635
3636         hdr = nl80211hdr_put(msg, pid, seq, flags,
3637                              NL80211_CMD_NEW_SCAN_RESULTS);
3638         if (!hdr)
3639                 return -1;
3640
3641         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3642         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3643
3644         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3645         if (!bss)
3646                 goto nla_put_failure;
3647         if (!is_zero_ether_addr(res->bssid))
3648                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3649         if (res->information_elements && res->len_information_elements)
3650                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3651                         res->len_information_elements,
3652                         res->information_elements);
3653         if (res->beacon_ies && res->len_beacon_ies &&
3654             res->beacon_ies != res->information_elements)
3655                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3656                         res->len_beacon_ies, res->beacon_ies);
3657         if (res->tsf)
3658                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3659         if (res->beacon_interval)
3660                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3661         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3662         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3663         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3664                 jiffies_to_msecs(jiffies - intbss->ts));
3665
3666         switch (rdev->wiphy.signal_type) {
3667         case CFG80211_SIGNAL_TYPE_MBM:
3668                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3669                 break;
3670         case CFG80211_SIGNAL_TYPE_UNSPEC:
3671                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3672                 break;
3673         default:
3674                 break;
3675         }
3676
3677         switch (wdev->iftype) {
3678         case NL80211_IFTYPE_P2P_CLIENT:
3679         case NL80211_IFTYPE_STATION:
3680                 if (intbss == wdev->current_bss)
3681                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3682                                     NL80211_BSS_STATUS_ASSOCIATED);
3683                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3684                         if (intbss != wdev->auth_bsses[i])
3685                                 continue;
3686                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3687                                     NL80211_BSS_STATUS_AUTHENTICATED);
3688                         break;
3689                 }
3690                 break;
3691         case NL80211_IFTYPE_ADHOC:
3692                 if (intbss == wdev->current_bss)
3693                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3694                                     NL80211_BSS_STATUS_IBSS_JOINED);
3695                 break;
3696         default:
3697                 break;
3698         }
3699
3700         nla_nest_end(msg, bss);
3701
3702         return genlmsg_end(msg, hdr);
3703
3704  nla_put_failure:
3705         genlmsg_cancel(msg, hdr);
3706         return -EMSGSIZE;
3707 }
3708
3709 static int nl80211_dump_scan(struct sk_buff *skb,
3710                              struct netlink_callback *cb)
3711 {
3712         struct cfg80211_registered_device *rdev;
3713         struct net_device *dev;
3714         struct cfg80211_internal_bss *scan;
3715         struct wireless_dev *wdev;
3716         int start = cb->args[1], idx = 0;
3717         int err;
3718
3719         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
3720         if (err)
3721                 return err;
3722
3723         wdev = dev->ieee80211_ptr;
3724
3725         wdev_lock(wdev);
3726         spin_lock_bh(&rdev->bss_lock);
3727         cfg80211_bss_expire(rdev);
3728
3729         list_for_each_entry(scan, &rdev->bss_list, list) {
3730                 if (++idx <= start)
3731                         continue;
3732                 if (nl80211_send_bss(skb,
3733                                 NETLINK_CB(cb->skb).pid,
3734                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3735                                 rdev, wdev, scan) < 0) {
3736                         idx--;
3737                         break;
3738                 }
3739         }
3740
3741         spin_unlock_bh(&rdev->bss_lock);
3742         wdev_unlock(wdev);
3743
3744         cb->args[1] = idx;
3745         nl80211_finish_netdev_dump(rdev);
3746
3747         return skb->len;
3748 }
3749
3750 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
3751                                 int flags, struct net_device *dev,
3752                                 struct survey_info *survey)
3753 {
3754         void *hdr;
3755         struct nlattr *infoattr;
3756
3757         /* Survey without a channel doesn't make sense */
3758         if (!survey->channel)
3759                 return -EINVAL;
3760
3761         hdr = nl80211hdr_put(msg, pid, seq, flags,
3762                              NL80211_CMD_NEW_SURVEY_RESULTS);
3763         if (!hdr)
3764                 return -ENOMEM;
3765
3766         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3767
3768         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
3769         if (!infoattr)
3770                 goto nla_put_failure;
3771
3772         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
3773                     survey->channel->center_freq);
3774         if (survey->filled & SURVEY_INFO_NOISE_DBM)
3775                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
3776                             survey->noise);
3777         if (survey->filled & SURVEY_INFO_IN_USE)
3778                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
3779         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
3780                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
3781                             survey->channel_time);
3782         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
3783                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
3784                             survey->channel_time_busy);
3785         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
3786                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
3787                             survey->channel_time_ext_busy);
3788         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
3789                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
3790                             survey->channel_time_rx);
3791         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
3792                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
3793                             survey->channel_time_tx);
3794
3795         nla_nest_end(msg, infoattr);
3796
3797         return genlmsg_end(msg, hdr);
3798
3799  nla_put_failure:
3800         genlmsg_cancel(msg, hdr);
3801         return -EMSGSIZE;
3802 }
3803
3804 static int nl80211_dump_survey(struct sk_buff *skb,
3805                         struct netlink_callback *cb)
3806 {
3807         struct survey_info survey;
3808         struct cfg80211_registered_device *dev;
3809         struct net_device *netdev;
3810         int survey_idx = cb->args[1];
3811         int res;
3812
3813         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3814         if (res)
3815                 return res;
3816
3817         if (!dev->ops->dump_survey) {
3818                 res = -EOPNOTSUPP;
3819                 goto out_err;
3820         }
3821
3822         while (1) {
3823                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
3824                                             &survey);
3825                 if (res == -ENOENT)
3826                         break;
3827                 if (res)
3828                         goto out_err;
3829
3830                 if (nl80211_send_survey(skb,
3831                                 NETLINK_CB(cb->skb).pid,
3832                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3833                                 netdev,
3834                                 &survey) < 0)
3835                         goto out;
3836                 survey_idx++;
3837         }
3838
3839  out:
3840         cb->args[1] = survey_idx;
3841         res = skb->len;
3842  out_err:
3843         nl80211_finish_netdev_dump(dev);
3844         return res;
3845 }
3846
3847 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
3848 {
3849         return auth_type <= NL80211_AUTHTYPE_MAX;
3850 }
3851
3852 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
3853 {
3854         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
3855                                   NL80211_WPA_VERSION_2));
3856 }
3857
3858 static bool nl80211_valid_akm_suite(u32 akm)
3859 {
3860         return akm == WLAN_AKM_SUITE_8021X ||
3861                 akm == WLAN_AKM_SUITE_PSK;
3862 }
3863
3864 static bool nl80211_valid_cipher_suite(u32 cipher)
3865 {
3866         return cipher == WLAN_CIPHER_SUITE_WEP40 ||
3867                 cipher == WLAN_CIPHER_SUITE_WEP104 ||
3868                 cipher == WLAN_CIPHER_SUITE_TKIP ||
3869                 cipher == WLAN_CIPHER_SUITE_CCMP ||
3870                 cipher == WLAN_CIPHER_SUITE_AES_CMAC;
3871 }
3872
3873
3874 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
3875 {
3876         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3877         struct net_device *dev = info->user_ptr[1];
3878         struct ieee80211_channel *chan;
3879         const u8 *bssid, *ssid, *ie = NULL;
3880         int err, ssid_len, ie_len = 0;
3881         enum nl80211_auth_type auth_type;
3882         struct key_parse key;
3883         bool local_state_change;
3884
3885         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3886                 return -EINVAL;
3887
3888         if (!info->attrs[NL80211_ATTR_MAC])
3889                 return -EINVAL;
3890
3891         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
3892                 return -EINVAL;
3893
3894         if (!info->attrs[NL80211_ATTR_SSID])
3895                 return -EINVAL;
3896
3897         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
3898                 return -EINVAL;
3899
3900         err = nl80211_parse_key(info, &key);
3901         if (err)
3902                 return err;
3903
3904         if (key.idx >= 0) {
3905                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
3906                         return -EINVAL;
3907                 if (!key.p.key || !key.p.key_len)
3908                         return -EINVAL;
3909                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
3910                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
3911                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
3912                      key.p.key_len != WLAN_KEY_LEN_WEP104))
3913                         return -EINVAL;
3914                 if (key.idx > 4)
3915                         return -EINVAL;
3916         } else {
3917                 key.p.key_len = 0;
3918                 key.p.key = NULL;
3919         }
3920
3921         if (key.idx >= 0) {
3922                 int i;
3923                 bool ok = false;
3924                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
3925                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
3926                                 ok = true;
3927                                 break;
3928                         }
3929                 }
3930                 if (!ok)
3931                         return -EINVAL;
3932         }
3933
3934         if (!rdev->ops->auth)
3935                 return -EOPNOTSUPP;
3936
3937         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
3938             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
3939                 return -EOPNOTSUPP;
3940
3941         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
3942         chan = ieee80211_get_channel(&rdev->wiphy,
3943                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
3944         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
3945                 return -EINVAL;
3946
3947         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
3948         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
3949
3950         if (info->attrs[NL80211_ATTR_IE]) {
3951                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
3952                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3953         }
3954
3955         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
3956         if (!nl80211_valid_auth_type(auth_type))
3957                 return -EINVAL;
3958
3959         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
3960
3961         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
3962                                   ssid, ssid_len, ie, ie_len,
3963                                   key.p.key, key.p.key_len, key.idx,
3964                                   local_state_change);
3965 }
3966
3967 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
3968                                    struct genl_info *info,
3969                                    struct cfg80211_crypto_settings *settings,
3970                                    int cipher_limit)
3971 {
3972         memset(settings, 0, sizeof(*settings));
3973
3974         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
3975
3976         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
3977                 u16 proto;
3978                 proto = nla_get_u16(
3979                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
3980                 settings->control_port_ethertype = cpu_to_be16(proto);
3981                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
3982                     proto != ETH_P_PAE)
3983                         return -EINVAL;
3984                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
3985                         settings->control_port_no_encrypt = true;
3986         } else
3987                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
3988
3989         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
3990                 void *data;
3991                 int len, i;
3992
3993                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3994                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
3995                 settings->n_ciphers_pairwise = len / sizeof(u32);
3996
3997                 if (len % sizeof(u32))
3998                         return -EINVAL;
3999
4000                 if (settings->n_ciphers_pairwise > cipher_limit)
4001                         return -EINVAL;
4002
4003                 memcpy(settings->ciphers_pairwise, data, len);
4004
4005                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4006                         if (!nl80211_valid_cipher_suite(
4007                                         settings->ciphers_pairwise[i]))
4008                                 return -EINVAL;
4009         }
4010
4011         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4012                 settings->cipher_group =
4013                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4014                 if (!nl80211_valid_cipher_suite(settings->cipher_group))
4015                         return -EINVAL;
4016         }
4017
4018         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4019                 settings->wpa_versions =
4020                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4021                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4022                         return -EINVAL;
4023         }
4024
4025         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4026                 void *data;
4027                 int len, i;
4028
4029                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4030                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4031                 settings->n_akm_suites = len / sizeof(u32);
4032
4033                 if (len % sizeof(u32))
4034                         return -EINVAL;
4035
4036                 memcpy(settings->akm_suites, data, len);
4037
4038                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4039                         if (!nl80211_valid_akm_suite(settings->akm_suites[i]))
4040                                 return -EINVAL;
4041         }
4042
4043         return 0;
4044 }
4045
4046 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4047 {
4048         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4049         struct net_device *dev = info->user_ptr[1];
4050         struct cfg80211_crypto_settings crypto;
4051         struct ieee80211_channel *chan;
4052         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4053         int err, ssid_len, ie_len = 0;
4054         bool use_mfp = false;
4055
4056         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4057                 return -EINVAL;
4058
4059         if (!info->attrs[NL80211_ATTR_MAC] ||
4060             !info->attrs[NL80211_ATTR_SSID] ||
4061             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4062                 return -EINVAL;
4063
4064         if (!rdev->ops->assoc)
4065                 return -EOPNOTSUPP;
4066
4067         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4068             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4069                 return -EOPNOTSUPP;
4070
4071         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4072
4073         chan = ieee80211_get_channel(&rdev->wiphy,
4074                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4075         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4076                 return -EINVAL;
4077
4078         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4079         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4080
4081         if (info->attrs[NL80211_ATTR_IE]) {
4082                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4083                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4084         }
4085
4086         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4087                 enum nl80211_mfp mfp =
4088                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4089                 if (mfp == NL80211_MFP_REQUIRED)
4090                         use_mfp = true;
4091                 else if (mfp != NL80211_MFP_NO)
4092                         return -EINVAL;
4093         }
4094
4095         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4096                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4097
4098         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4099         if (!err)
4100                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4101                                           ssid, ssid_len, ie, ie_len, use_mfp,
4102                                           &crypto);
4103
4104         return err;
4105 }
4106
4107 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4108 {
4109         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4110         struct net_device *dev = info->user_ptr[1];
4111         const u8 *ie = NULL, *bssid;
4112         int ie_len = 0;
4113         u16 reason_code;
4114         bool local_state_change;
4115
4116         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4117                 return -EINVAL;
4118
4119         if (!info->attrs[NL80211_ATTR_MAC])
4120                 return -EINVAL;
4121
4122         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4123                 return -EINVAL;
4124
4125         if (!rdev->ops->deauth)
4126                 return -EOPNOTSUPP;
4127
4128         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4129             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4130                 return -EOPNOTSUPP;
4131
4132         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4133
4134         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4135         if (reason_code == 0) {
4136                 /* Reason Code 0 is reserved */
4137                 return -EINVAL;
4138         }
4139
4140         if (info->attrs[NL80211_ATTR_IE]) {
4141                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4142                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4143         }
4144
4145         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4146
4147         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4148                                     local_state_change);
4149 }
4150
4151 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4152 {
4153         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4154         struct net_device *dev = info->user_ptr[1];
4155         const u8 *ie = NULL, *bssid;
4156         int ie_len = 0;
4157         u16 reason_code;
4158         bool local_state_change;
4159
4160         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4161                 return -EINVAL;
4162
4163         if (!info->attrs[NL80211_ATTR_MAC])
4164                 return -EINVAL;
4165
4166         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4167                 return -EINVAL;
4168
4169         if (!rdev->ops->disassoc)
4170                 return -EOPNOTSUPP;
4171
4172         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4173             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4174                 return -EOPNOTSUPP;
4175
4176         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4177
4178         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4179         if (reason_code == 0) {
4180                 /* Reason Code 0 is reserved */
4181                 return -EINVAL;
4182         }
4183
4184         if (info->attrs[NL80211_ATTR_IE]) {
4185                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4186                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4187         }
4188
4189         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4190
4191         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4192                                       local_state_change);
4193 }
4194
4195 static bool
4196 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4197                          int mcast_rate[IEEE80211_NUM_BANDS],
4198                          int rateval)
4199 {
4200         struct wiphy *wiphy = &rdev->wiphy;
4201         bool found = false;
4202         int band, i;
4203
4204         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4205                 struct ieee80211_supported_band *sband;
4206
4207                 sband = wiphy->bands[band];
4208                 if (!sband)
4209                         continue;
4210
4211                 for (i = 0; i < sband->n_bitrates; i++) {
4212                         if (sband->bitrates[i].bitrate == rateval) {
4213                                 mcast_rate[band] = i + 1;
4214                                 found = true;
4215                                 break;
4216                         }
4217                 }
4218         }
4219
4220         return found;
4221 }
4222
4223 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4224 {
4225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4226         struct net_device *dev = info->user_ptr[1];
4227         struct cfg80211_ibss_params ibss;
4228         struct wiphy *wiphy;
4229         struct cfg80211_cached_keys *connkeys = NULL;
4230         int err;
4231
4232         memset(&ibss, 0, sizeof(ibss));
4233
4234         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4235                 return -EINVAL;
4236
4237         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4238             !info->attrs[NL80211_ATTR_SSID] ||
4239             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4240                 return -EINVAL;
4241
4242         ibss.beacon_interval = 100;
4243
4244         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4245                 ibss.beacon_interval =
4246                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4247                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4248                         return -EINVAL;
4249         }
4250
4251         if (!rdev->ops->join_ibss)
4252                 return -EOPNOTSUPP;
4253
4254         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4255                 return -EOPNOTSUPP;
4256
4257         wiphy = &rdev->wiphy;
4258
4259         if (info->attrs[NL80211_ATTR_MAC])
4260                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4261         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4262         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4263
4264         if (info->attrs[NL80211_ATTR_IE]) {
4265                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4266                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4267         }
4268
4269         ibss.channel = ieee80211_get_channel(wiphy,
4270                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4271         if (!ibss.channel ||
4272             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4273             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4274                 return -EINVAL;
4275
4276         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4277         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4278
4279         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4280                 u8 *rates =
4281                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4282                 int n_rates =
4283                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4284                 struct ieee80211_supported_band *sband =
4285                         wiphy->bands[ibss.channel->band];
4286                 int i, j;
4287
4288                 if (n_rates == 0)
4289                         return -EINVAL;
4290
4291                 for (i = 0; i < n_rates; i++) {
4292                         int rate = (rates[i] & 0x7f) * 5;
4293                         bool found = false;
4294
4295                         for (j = 0; j < sband->n_bitrates; j++) {
4296                                 if (sband->bitrates[j].bitrate == rate) {
4297                                         found = true;
4298                                         ibss.basic_rates |= BIT(j);
4299                                         break;
4300                                 }
4301                         }
4302                         if (!found)
4303                                 return -EINVAL;
4304                 }
4305         }
4306
4307         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4308             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4309                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4310                 return -EINVAL;
4311
4312         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4313                 connkeys = nl80211_parse_connkeys(rdev,
4314                                         info->attrs[NL80211_ATTR_KEYS]);
4315                 if (IS_ERR(connkeys))
4316                         return PTR_ERR(connkeys);
4317         }
4318
4319         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4320         if (err)
4321                 kfree(connkeys);
4322         return err;
4323 }
4324
4325 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4326 {
4327         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4328         struct net_device *dev = info->user_ptr[1];
4329
4330         if (!rdev->ops->leave_ibss)
4331                 return -EOPNOTSUPP;
4332
4333         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4334                 return -EOPNOTSUPP;
4335
4336         return cfg80211_leave_ibss(rdev, dev, false);
4337 }
4338
4339 #ifdef CONFIG_NL80211_TESTMODE
4340 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4341         .name = "testmode",
4342 };
4343
4344 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4345 {
4346         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4347         int err;
4348
4349         if (!info->attrs[NL80211_ATTR_TESTDATA])
4350                 return -EINVAL;
4351
4352         err = -EOPNOTSUPP;
4353         if (rdev->ops->testmode_cmd) {
4354                 rdev->testmode_info = info;
4355                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4356                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4357                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4358                 rdev->testmode_info = NULL;
4359         }
4360
4361         return err;
4362 }
4363
4364 static int nl80211_testmode_dump(struct sk_buff *skb,
4365                                  struct netlink_callback *cb)
4366 {
4367         struct cfg80211_registered_device *dev;
4368         int err;
4369         long phy_idx;
4370         void *data = NULL;
4371         int data_len = 0;
4372
4373         if (cb->args[0]) {
4374                 /*
4375                  * 0 is a valid index, but not valid for args[0],
4376                  * so we need to offset by 1.
4377                  */
4378                 phy_idx = cb->args[0] - 1;
4379         } else {
4380                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4381                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4382                                   nl80211_policy);
4383                 if (err)
4384                         return err;
4385                 if (!nl80211_fam.attrbuf[NL80211_ATTR_WIPHY])
4386                         return -EINVAL;
4387                 phy_idx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4388                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4389                         cb->args[1] =
4390                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4391         }
4392
4393         if (cb->args[1]) {
4394                 data = nla_data((void *)cb->args[1]);
4395                 data_len = nla_len((void *)cb->args[1]);
4396         }
4397
4398         mutex_lock(&cfg80211_mutex);
4399         dev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4400         if (!dev) {
4401                 mutex_unlock(&cfg80211_mutex);
4402                 return -ENOENT;
4403         }
4404         cfg80211_lock_rdev(dev);
4405         mutex_unlock(&cfg80211_mutex);
4406
4407         if (!dev->ops->testmode_dump) {
4408                 err = -EOPNOTSUPP;
4409                 goto out_err;
4410         }
4411
4412         while (1) {
4413                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4414                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4415                                            NL80211_CMD_TESTMODE);
4416                 struct nlattr *tmdata;
4417
4418                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, dev->wiphy_idx) < 0) {
4419                         genlmsg_cancel(skb, hdr);
4420                         break;
4421                 }
4422
4423                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4424                 if (!tmdata) {
4425                         genlmsg_cancel(skb, hdr);
4426                         break;
4427                 }
4428                 err = dev->ops->testmode_dump(&dev->wiphy, skb, cb,
4429                                               data, data_len);
4430                 nla_nest_end(skb, tmdata);
4431
4432                 if (err == -ENOBUFS || err == -ENOENT) {
4433                         genlmsg_cancel(skb, hdr);
4434                         break;
4435                 } else if (err) {
4436                         genlmsg_cancel(skb, hdr);
4437                         goto out_err;
4438                 }
4439
4440                 genlmsg_end(skb, hdr);
4441         }
4442
4443         err = skb->len;
4444         /* see above */
4445         cb->args[0] = phy_idx + 1;
4446  out_err:
4447         cfg80211_unlock_rdev(dev);
4448         return err;
4449 }
4450
4451 static struct sk_buff *
4452 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4453                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4454 {
4455         struct sk_buff *skb;
4456         void *hdr;
4457         struct nlattr *data;
4458
4459         skb = nlmsg_new(approxlen + 100, gfp);
4460         if (!skb)
4461                 return NULL;
4462
4463         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4464         if (!hdr) {
4465                 kfree_skb(skb);
4466                 return NULL;
4467         }
4468
4469         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4470         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4471
4472         ((void **)skb->cb)[0] = rdev;
4473         ((void **)skb->cb)[1] = hdr;
4474         ((void **)skb->cb)[2] = data;
4475
4476         return skb;
4477
4478  nla_put_failure:
4479         kfree_skb(skb);
4480         return NULL;
4481 }
4482
4483 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4484                                                   int approxlen)
4485 {
4486         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4487
4488         if (WARN_ON(!rdev->testmode_info))
4489                 return NULL;
4490
4491         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4492                                 rdev->testmode_info->snd_pid,
4493                                 rdev->testmode_info->snd_seq,
4494                                 GFP_KERNEL);
4495 }
4496 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4497
4498 int cfg80211_testmode_reply(struct sk_buff *skb)
4499 {
4500         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4501         void *hdr = ((void **)skb->cb)[1];
4502         struct nlattr *data = ((void **)skb->cb)[2];
4503
4504         if (WARN_ON(!rdev->testmode_info)) {
4505                 kfree_skb(skb);
4506                 return -EINVAL;
4507         }
4508
4509         nla_nest_end(skb, data);
4510         genlmsg_end(skb, hdr);
4511         return genlmsg_reply(skb, rdev->testmode_info);
4512 }
4513 EXPORT_SYMBOL(cfg80211_testmode_reply);
4514
4515 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4516                                                   int approxlen, gfp_t gfp)
4517 {
4518         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4519
4520         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4521 }
4522 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4523
4524 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4525 {
4526         void *hdr = ((void **)skb->cb)[1];
4527         struct nlattr *data = ((void **)skb->cb)[2];
4528
4529         nla_nest_end(skb, data);
4530         genlmsg_end(skb, hdr);
4531         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
4532 }
4533 EXPORT_SYMBOL(cfg80211_testmode_event);
4534 #endif
4535
4536 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4537 {
4538         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4539         struct net_device *dev = info->user_ptr[1];
4540         struct cfg80211_connect_params connect;
4541         struct wiphy *wiphy;
4542         struct cfg80211_cached_keys *connkeys = NULL;
4543         int err;
4544
4545         memset(&connect, 0, sizeof(connect));
4546
4547         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4548                 return -EINVAL;
4549
4550         if (!info->attrs[NL80211_ATTR_SSID] ||
4551             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4552                 return -EINVAL;
4553
4554         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4555                 connect.auth_type =
4556                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4557                 if (!nl80211_valid_auth_type(connect.auth_type))
4558                         return -EINVAL;
4559         } else
4560                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4561
4562         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4563
4564         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4565                                       NL80211_MAX_NR_CIPHER_SUITES);
4566         if (err)
4567                 return err;
4568
4569         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4570             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4571                 return -EOPNOTSUPP;
4572
4573         wiphy = &rdev->wiphy;
4574
4575         if (info->attrs[NL80211_ATTR_MAC])
4576                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4577         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4578         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4579
4580         if (info->attrs[NL80211_ATTR_IE]) {
4581                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4582                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4583         }
4584
4585         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4586                 connect.channel =
4587                         ieee80211_get_channel(wiphy,
4588                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4589                 if (!connect.channel ||
4590                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4591                         return -EINVAL;
4592         }
4593
4594         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4595                 connkeys = nl80211_parse_connkeys(rdev,
4596                                         info->attrs[NL80211_ATTR_KEYS]);
4597                 if (IS_ERR(connkeys))
4598                         return PTR_ERR(connkeys);
4599         }
4600
4601         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4602         if (err)
4603                 kfree(connkeys);
4604         return err;
4605 }
4606
4607 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4608 {
4609         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4610         struct net_device *dev = info->user_ptr[1];
4611         u16 reason;
4612
4613         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4614                 reason = WLAN_REASON_DEAUTH_LEAVING;
4615         else
4616                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4617
4618         if (reason == 0)
4619                 return -EINVAL;
4620
4621         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4622             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4623                 return -EOPNOTSUPP;
4624
4625         return cfg80211_disconnect(rdev, dev, reason, true);
4626 }
4627
4628 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4629 {
4630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4631         struct net *net;
4632         int err;
4633         u32 pid;
4634
4635         if (!info->attrs[NL80211_ATTR_PID])
4636                 return -EINVAL;
4637
4638         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4639
4640         net = get_net_ns_by_pid(pid);
4641         if (IS_ERR(net))
4642                 return PTR_ERR(net);
4643
4644         err = 0;
4645
4646         /* check if anything to do */
4647         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4648                 err = cfg80211_switch_netns(rdev, net);
4649
4650         put_net(net);
4651         return err;
4652 }
4653
4654 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4655 {
4656         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4657         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4658                         struct cfg80211_pmksa *pmksa) = NULL;
4659         struct net_device *dev = info->user_ptr[1];
4660         struct cfg80211_pmksa pmksa;
4661
4662         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4663
4664         if (!info->attrs[NL80211_ATTR_MAC])
4665                 return -EINVAL;
4666
4667         if (!info->attrs[NL80211_ATTR_PMKID])
4668                 return -EINVAL;
4669
4670         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4671         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4672
4673         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4674             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4675                 return -EOPNOTSUPP;
4676
4677         switch (info->genlhdr->cmd) {
4678         case NL80211_CMD_SET_PMKSA:
4679                 rdev_ops = rdev->ops->set_pmksa;
4680                 break;
4681         case NL80211_CMD_DEL_PMKSA:
4682                 rdev_ops = rdev->ops->del_pmksa;
4683                 break;
4684         default:
4685                 WARN_ON(1);
4686                 break;
4687         }
4688
4689         if (!rdev_ops)
4690                 return -EOPNOTSUPP;
4691
4692         return rdev_ops(&rdev->wiphy, dev, &pmksa);
4693 }
4694
4695 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
4696 {
4697         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4698         struct net_device *dev = info->user_ptr[1];
4699
4700         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4701             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4702                 return -EOPNOTSUPP;
4703
4704         if (!rdev->ops->flush_pmksa)
4705                 return -EOPNOTSUPP;
4706
4707         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
4708 }
4709
4710 static int nl80211_remain_on_channel(struct sk_buff *skb,
4711                                      struct genl_info *info)
4712 {
4713         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4714         struct net_device *dev = info->user_ptr[1];
4715         struct ieee80211_channel *chan;
4716         struct sk_buff *msg;
4717         void *hdr;
4718         u64 cookie;
4719         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4720         u32 freq, duration;
4721         int err;
4722
4723         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4724             !info->attrs[NL80211_ATTR_DURATION])
4725                 return -EINVAL;
4726
4727         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4728
4729         /*
4730          * We should be on that channel for at least one jiffie,
4731          * and more than 5 seconds seems excessive.
4732          */
4733         if (!duration || !msecs_to_jiffies(duration) ||
4734             duration > rdev->wiphy.max_remain_on_channel_duration)
4735                 return -EINVAL;
4736
4737         if (!rdev->ops->remain_on_channel)
4738                 return -EOPNOTSUPP;
4739
4740         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4741                 channel_type = nla_get_u32(
4742                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4743                 if (channel_type != NL80211_CHAN_NO_HT &&
4744                     channel_type != NL80211_CHAN_HT20 &&
4745                     channel_type != NL80211_CHAN_HT40PLUS &&
4746                     channel_type != NL80211_CHAN_HT40MINUS)
4747                         return -EINVAL;
4748         }
4749
4750         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4751         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4752         if (chan == NULL)
4753                 return -EINVAL;
4754
4755         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4756         if (!msg)
4757                 return -ENOMEM;
4758
4759         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4760                              NL80211_CMD_REMAIN_ON_CHANNEL);
4761
4762         if (IS_ERR(hdr)) {
4763                 err = PTR_ERR(hdr);
4764                 goto free_msg;
4765         }
4766
4767         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
4768                                            channel_type, duration, &cookie);
4769
4770         if (err)
4771                 goto free_msg;
4772
4773         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4774
4775         genlmsg_end(msg, hdr);
4776
4777         return genlmsg_reply(msg, info);
4778
4779  nla_put_failure:
4780         err = -ENOBUFS;
4781  free_msg:
4782         nlmsg_free(msg);
4783         return err;
4784 }
4785
4786 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
4787                                             struct genl_info *info)
4788 {
4789         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4790         struct net_device *dev = info->user_ptr[1];
4791         u64 cookie;
4792
4793         if (!info->attrs[NL80211_ATTR_COOKIE])
4794                 return -EINVAL;
4795
4796         if (!rdev->ops->cancel_remain_on_channel)
4797                 return -EOPNOTSUPP;
4798
4799         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
4800
4801         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
4802 }
4803
4804 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
4805                            u8 *rates, u8 rates_len)
4806 {
4807         u8 i;
4808         u32 mask = 0;
4809
4810         for (i = 0; i < rates_len; i++) {
4811                 int rate = (rates[i] & 0x7f) * 5;
4812                 int ridx;
4813                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
4814                         struct ieee80211_rate *srate =
4815                                 &sband->bitrates[ridx];
4816                         if (rate == srate->bitrate) {
4817                                 mask |= 1 << ridx;
4818                                 break;
4819                         }
4820                 }
4821                 if (ridx == sband->n_bitrates)
4822                         return 0; /* rate not found */
4823         }
4824
4825         return mask;
4826 }
4827
4828 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
4829         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
4830                                     .len = NL80211_MAX_SUPP_RATES },
4831 };
4832
4833 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
4834                                        struct genl_info *info)
4835 {
4836         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
4837         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4838         struct cfg80211_bitrate_mask mask;
4839         int rem, i;
4840         struct net_device *dev = info->user_ptr[1];
4841         struct nlattr *tx_rates;
4842         struct ieee80211_supported_band *sband;
4843
4844         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
4845                 return -EINVAL;
4846
4847         if (!rdev->ops->set_bitrate_mask)
4848                 return -EOPNOTSUPP;
4849
4850         memset(&mask, 0, sizeof(mask));
4851         /* Default to all rates enabled */
4852         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
4853                 sband = rdev->wiphy.bands[i];
4854                 mask.control[i].legacy =
4855                         sband ? (1 << sband->n_bitrates) - 1 : 0;
4856         }
4857
4858         /*
4859          * The nested attribute uses enum nl80211_band as the index. This maps
4860          * directly to the enum ieee80211_band values used in cfg80211.
4861          */
4862         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
4863         {
4864                 enum ieee80211_band band = nla_type(tx_rates);
4865                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
4866                         return -EINVAL;
4867                 sband = rdev->wiphy.bands[band];
4868                 if (sband == NULL)
4869                         return -EINVAL;
4870                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
4871                           nla_len(tx_rates), nl80211_txattr_policy);
4872                 if (tb[NL80211_TXRATE_LEGACY]) {
4873                         mask.control[band].legacy = rateset_to_mask(
4874                                 sband,
4875                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
4876                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
4877                         if (mask.control[band].legacy == 0)
4878                                 return -EINVAL;
4879                 }
4880         }
4881
4882         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
4883 }
4884
4885 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
4886 {
4887         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4888         struct net_device *dev = info->user_ptr[1];
4889         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
4890
4891         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
4892                 return -EINVAL;
4893
4894         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
4895                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
4896
4897         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4898             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4899             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4900             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4901             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4902             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4903             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4904                 return -EOPNOTSUPP;
4905
4906         /* not much point in registering if we can't reply */
4907         if (!rdev->ops->mgmt_tx)
4908                 return -EOPNOTSUPP;
4909
4910         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
4911                         frame_type,
4912                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
4913                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
4914 }
4915
4916 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
4917 {
4918         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4919         struct net_device *dev = info->user_ptr[1];
4920         struct ieee80211_channel *chan;
4921         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
4922         bool channel_type_valid = false;
4923         u32 freq;
4924         int err;
4925         void *hdr;
4926         u64 cookie;
4927         struct sk_buff *msg;
4928         unsigned int wait = 0;
4929         bool offchan;
4930
4931         if (!info->attrs[NL80211_ATTR_FRAME] ||
4932             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4933                 return -EINVAL;
4934
4935         if (!rdev->ops->mgmt_tx)
4936                 return -EOPNOTSUPP;
4937
4938         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4939             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
4940             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
4941             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
4942             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
4943             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
4944             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
4945                 return -EOPNOTSUPP;
4946
4947         if (info->attrs[NL80211_ATTR_DURATION]) {
4948                 if (!rdev->ops->mgmt_tx_cancel_wait)
4949                         return -EINVAL;
4950                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
4951         }
4952
4953         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
4954                 channel_type = nla_get_u32(
4955                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
4956                 if (channel_type != NL80211_CHAN_NO_HT &&
4957                     channel_type != NL80211_CHAN_HT20 &&
4958                     channel_type != NL80211_CHAN_HT40PLUS &&
4959                     channel_type != NL80211_CHAN_HT40MINUS)
4960                         return -EINVAL;
4961                 channel_type_valid = true;
4962         }
4963
4964         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
4965
4966         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
4967         chan = rdev_freq_to_chan(rdev, freq, channel_type);
4968         if (chan == NULL)
4969                 return -EINVAL;
4970
4971         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4972         if (!msg)
4973                 return -ENOMEM;
4974
4975         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
4976                              NL80211_CMD_FRAME);
4977
4978         if (IS_ERR(hdr)) {
4979                 err = PTR_ERR(hdr);
4980                 goto free_msg;
4981         }
4982         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
4983                                     channel_type_valid, wait,
4984                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
4985                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
4986                                     &cookie);
4987         if (err)
4988                 goto free_msg;
4989
4990         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
4991
4992         genlmsg_end(msg, hdr);
4993         return genlmsg_reply(msg, info);
4994
4995  nla_put_failure:
4996         err = -ENOBUFS;
4997  free_msg:
4998         nlmsg_free(msg);
4999         return err;
5000 }
5001
5002 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5003 {
5004         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5005         struct net_device *dev = info->user_ptr[1];
5006         u64 cookie;
5007
5008         if (!info->attrs[NL80211_ATTR_COOKIE])
5009                 return -EINVAL;
5010
5011         if (!rdev->ops->mgmt_tx_cancel_wait)
5012                 return -EOPNOTSUPP;
5013
5014         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5015             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5016             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5017             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5018             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5019             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5020                 return -EOPNOTSUPP;
5021
5022         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5023
5024         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5025 }
5026
5027 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5028 {
5029         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5030         struct wireless_dev *wdev;
5031         struct net_device *dev = info->user_ptr[1];
5032         u8 ps_state;
5033         bool state;
5034         int err;
5035
5036         if (!info->attrs[NL80211_ATTR_PS_STATE])
5037                 return -EINVAL;
5038
5039         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5040
5041         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5042                 return -EINVAL;
5043
5044         wdev = dev->ieee80211_ptr;
5045
5046         if (!rdev->ops->set_power_mgmt)
5047                 return -EOPNOTSUPP;
5048
5049         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5050
5051         if (state == wdev->ps)
5052                 return 0;
5053
5054         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5055                                         wdev->ps_timeout);
5056         if (!err)
5057                 wdev->ps = state;
5058         return err;
5059 }
5060
5061 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5062 {
5063         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5064         enum nl80211_ps_state ps_state;
5065         struct wireless_dev *wdev;
5066         struct net_device *dev = info->user_ptr[1];
5067         struct sk_buff *msg;
5068         void *hdr;
5069         int err;
5070
5071         wdev = dev->ieee80211_ptr;
5072
5073         if (!rdev->ops->set_power_mgmt)
5074                 return -EOPNOTSUPP;
5075
5076         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5077         if (!msg)
5078                 return -ENOMEM;
5079
5080         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5081                              NL80211_CMD_GET_POWER_SAVE);
5082         if (!hdr) {
5083                 err = -ENOBUFS;
5084                 goto free_msg;
5085         }
5086
5087         if (wdev->ps)
5088                 ps_state = NL80211_PS_ENABLED;
5089         else
5090                 ps_state = NL80211_PS_DISABLED;
5091
5092         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5093
5094         genlmsg_end(msg, hdr);
5095         return genlmsg_reply(msg, info);
5096
5097  nla_put_failure:
5098         err = -ENOBUFS;
5099  free_msg:
5100         nlmsg_free(msg);
5101         return err;
5102 }
5103
5104 static struct nla_policy
5105 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5106         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5107         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5108         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5109 };
5110
5111 static int nl80211_set_cqm_rssi(struct genl_info *info,
5112                                 s32 threshold, u32 hysteresis)
5113 {
5114         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5115         struct wireless_dev *wdev;
5116         struct net_device *dev = info->user_ptr[1];
5117
5118         if (threshold > 0)
5119                 return -EINVAL;
5120
5121         wdev = dev->ieee80211_ptr;
5122
5123         if (!rdev->ops->set_cqm_rssi_config)
5124                 return -EOPNOTSUPP;
5125
5126         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5127             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5128                 return -EOPNOTSUPP;
5129
5130         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5131                                               threshold, hysteresis);
5132 }
5133
5134 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5135 {
5136         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5137         struct nlattr *cqm;
5138         int err;
5139
5140         cqm = info->attrs[NL80211_ATTR_CQM];
5141         if (!cqm) {
5142                 err = -EINVAL;
5143                 goto out;
5144         }
5145
5146         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5147                                nl80211_attr_cqm_policy);
5148         if (err)
5149                 goto out;
5150
5151         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5152             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5153                 s32 threshold;
5154                 u32 hysteresis;
5155                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5156                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5157                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5158         } else
5159                 err = -EINVAL;
5160
5161 out:
5162         return err;
5163 }
5164
5165 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5166 {
5167         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5168         struct net_device *dev = info->user_ptr[1];
5169         struct mesh_config cfg;
5170         struct mesh_setup setup;
5171         int err;
5172
5173         /* start with default */
5174         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5175         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5176
5177         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5178                 /* and parse parameters if given */
5179                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5180                 if (err)
5181                         return err;
5182         }
5183
5184         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5185             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5186                 return -EINVAL;
5187
5188         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5189         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5190
5191         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5192                 /* parse additional setup parameters if given */
5193                 err = nl80211_parse_mesh_setup(info, &setup);
5194                 if (err)
5195                         return err;
5196         }
5197
5198         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5199 }
5200
5201 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5202 {
5203         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5204         struct net_device *dev = info->user_ptr[1];
5205
5206         return cfg80211_leave_mesh(rdev, dev);
5207 }
5208
5209 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5210 {
5211         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5212         struct sk_buff *msg;
5213         void *hdr;
5214
5215         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5216                 return -EOPNOTSUPP;
5217
5218         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5219         if (!msg)
5220                 return -ENOMEM;
5221
5222         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5223                              NL80211_CMD_GET_WOWLAN);
5224         if (!hdr)
5225                 goto nla_put_failure;
5226
5227         if (rdev->wowlan) {
5228                 struct nlattr *nl_wowlan;
5229
5230                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5231                 if (!nl_wowlan)
5232                         goto nla_put_failure;
5233
5234                 if (rdev->wowlan->any)
5235                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5236                 if (rdev->wowlan->disconnect)
5237                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5238                 if (rdev->wowlan->magic_pkt)
5239                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5240                 if (rdev->wowlan->n_patterns) {
5241                         struct nlattr *nl_pats, *nl_pat;
5242                         int i, pat_len;
5243
5244                         nl_pats = nla_nest_start(msg,
5245                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5246                         if (!nl_pats)
5247                                 goto nla_put_failure;
5248
5249                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5250                                 nl_pat = nla_nest_start(msg, i + 1);
5251                                 if (!nl_pat)
5252                                         goto nla_put_failure;
5253                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5254                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5255                                         DIV_ROUND_UP(pat_len, 8),
5256                                         rdev->wowlan->patterns[i].mask);
5257                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5258                                         pat_len,
5259                                         rdev->wowlan->patterns[i].pattern);
5260                                 nla_nest_end(msg, nl_pat);
5261                         }
5262                         nla_nest_end(msg, nl_pats);
5263                 }
5264
5265                 nla_nest_end(msg, nl_wowlan);
5266         }
5267
5268         genlmsg_end(msg, hdr);
5269         return genlmsg_reply(msg, info);
5270
5271 nla_put_failure:
5272         nlmsg_free(msg);
5273         return -ENOBUFS;
5274 }
5275
5276 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5277 {
5278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5279         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5280         struct cfg80211_wowlan no_triggers = {};
5281         struct cfg80211_wowlan new_triggers = {};
5282         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5283         int err, i;
5284
5285         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5286                 return -EOPNOTSUPP;
5287
5288         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5289                 goto no_triggers;
5290
5291         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5292                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5293                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5294                         nl80211_wowlan_policy);
5295         if (err)
5296                 return err;
5297
5298         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
5299                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
5300                         return -EINVAL;
5301                 new_triggers.any = true;
5302         }
5303
5304         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
5305                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
5306                         return -EINVAL;
5307                 new_triggers.disconnect = true;
5308         }
5309
5310         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
5311                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
5312                         return -EINVAL;
5313                 new_triggers.magic_pkt = true;
5314         }
5315
5316         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
5317                 struct nlattr *pat;
5318                 int n_patterns = 0;
5319                 int rem, pat_len, mask_len;
5320                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
5321
5322                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5323                                     rem)
5324                         n_patterns++;
5325                 if (n_patterns > wowlan->n_patterns)
5326                         return -EINVAL;
5327
5328                 new_triggers.patterns = kcalloc(n_patterns,
5329                                                 sizeof(new_triggers.patterns[0]),
5330                                                 GFP_KERNEL);
5331                 if (!new_triggers.patterns)
5332                         return -ENOMEM;
5333
5334                 new_triggers.n_patterns = n_patterns;
5335                 i = 0;
5336
5337                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5338                                     rem) {
5339                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
5340                                   nla_data(pat), nla_len(pat), NULL);
5341                         err = -EINVAL;
5342                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
5343                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
5344                                 goto error;
5345                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
5346                         mask_len = DIV_ROUND_UP(pat_len, 8);
5347                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
5348                             mask_len)
5349                                 goto error;
5350                         if (pat_len > wowlan->pattern_max_len ||
5351                             pat_len < wowlan->pattern_min_len)
5352                                 goto error;
5353
5354                         new_triggers.patterns[i].mask =
5355                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
5356                         if (!new_triggers.patterns[i].mask) {
5357                                 err = -ENOMEM;
5358                                 goto error;
5359                         }
5360                         new_triggers.patterns[i].pattern =
5361                                 new_triggers.patterns[i].mask + mask_len;
5362                         memcpy(new_triggers.patterns[i].mask,
5363                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
5364                                mask_len);
5365                         new_triggers.patterns[i].pattern_len = pat_len;
5366                         memcpy(new_triggers.patterns[i].pattern,
5367                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
5368                                pat_len);
5369                         i++;
5370                 }
5371         }
5372
5373         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
5374                 struct cfg80211_wowlan *ntrig;
5375                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
5376                                 GFP_KERNEL);
5377                 if (!ntrig) {
5378                         err = -ENOMEM;
5379                         goto error;
5380                 }
5381                 cfg80211_rdev_free_wowlan(rdev);
5382                 rdev->wowlan = ntrig;
5383         } else {
5384  no_triggers:
5385                 cfg80211_rdev_free_wowlan(rdev);
5386                 rdev->wowlan = NULL;
5387         }
5388
5389         return 0;
5390  error:
5391         for (i = 0; i < new_triggers.n_patterns; i++)
5392                 kfree(new_triggers.patterns[i].mask);
5393         kfree(new_triggers.patterns);
5394         return err;
5395 }
5396
5397 #define NL80211_FLAG_NEED_WIPHY         0x01
5398 #define NL80211_FLAG_NEED_NETDEV        0x02
5399 #define NL80211_FLAG_NEED_RTNL          0x04
5400 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
5401 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
5402                                          NL80211_FLAG_CHECK_NETDEV_UP)
5403
5404 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
5405                             struct genl_info *info)
5406 {
5407         struct cfg80211_registered_device *rdev;
5408         struct net_device *dev;
5409         int err;
5410         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
5411
5412         if (rtnl)
5413                 rtnl_lock();
5414
5415         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
5416                 rdev = cfg80211_get_dev_from_info(info);
5417                 if (IS_ERR(rdev)) {
5418                         if (rtnl)
5419                                 rtnl_unlock();
5420                         return PTR_ERR(rdev);
5421                 }
5422                 info->user_ptr[0] = rdev;
5423         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
5424                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5425                 if (err) {
5426                         if (rtnl)
5427                                 rtnl_unlock();
5428                         return err;
5429                 }
5430                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
5431                     !netif_running(dev)) {
5432                         cfg80211_unlock_rdev(rdev);
5433                         dev_put(dev);
5434                         if (rtnl)
5435                                 rtnl_unlock();
5436                         return -ENETDOWN;
5437                 }
5438                 info->user_ptr[0] = rdev;
5439                 info->user_ptr[1] = dev;
5440         }
5441
5442         return 0;
5443 }
5444
5445 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
5446                               struct genl_info *info)
5447 {
5448         if (info->user_ptr[0])
5449                 cfg80211_unlock_rdev(info->user_ptr[0]);
5450         if (info->user_ptr[1])
5451                 dev_put(info->user_ptr[1]);
5452         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
5453                 rtnl_unlock();
5454 }
5455
5456 static struct genl_ops nl80211_ops[] = {
5457         {
5458                 .cmd = NL80211_CMD_GET_WIPHY,
5459                 .doit = nl80211_get_wiphy,
5460                 .dumpit = nl80211_dump_wiphy,
5461                 .policy = nl80211_policy,
5462                 /* can be retrieved by unprivileged users */
5463                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
5464         },
5465         {
5466                 .cmd = NL80211_CMD_SET_WIPHY,
5467                 .doit = nl80211_set_wiphy,
5468                 .policy = nl80211_policy,
5469                 .flags = GENL_ADMIN_PERM,
5470                 .internal_flags = NL80211_FLAG_NEED_RTNL,
5471         },
5472         {
5473                 .cmd = NL80211_CMD_GET_INTERFACE,
5474                 .doit = nl80211_get_interface,
5475                 .dumpit = nl80211_dump_interface,
5476                 .policy = nl80211_policy,
5477                 /* can be retrieved by unprivileged users */
5478                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
5479         },
5480         {
5481                 .cmd = NL80211_CMD_SET_INTERFACE,
5482                 .doit = nl80211_set_interface,
5483                 .policy = nl80211_policy,
5484                 .flags = GENL_ADMIN_PERM,
5485                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5486                                   NL80211_FLAG_NEED_RTNL,
5487         },
5488         {
5489                 .cmd = NL80211_CMD_NEW_INTERFACE,
5490                 .doit = nl80211_new_interface,
5491                 .policy = nl80211_policy,
5492                 .flags = GENL_ADMIN_PERM,
5493                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5494                                   NL80211_FLAG_NEED_RTNL,
5495         },
5496         {
5497                 .cmd = NL80211_CMD_DEL_INTERFACE,
5498                 .doit = nl80211_del_interface,
5499                 .policy = nl80211_policy,
5500                 .flags = GENL_ADMIN_PERM,
5501                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5502                                   NL80211_FLAG_NEED_RTNL,
5503         },
5504         {
5505                 .cmd = NL80211_CMD_GET_KEY,
5506                 .doit = nl80211_get_key,
5507                 .policy = nl80211_policy,
5508                 .flags = GENL_ADMIN_PERM,
5509                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5510                                   NL80211_FLAG_NEED_RTNL,
5511         },
5512         {
5513                 .cmd = NL80211_CMD_SET_KEY,
5514                 .doit = nl80211_set_key,
5515                 .policy = nl80211_policy,
5516                 .flags = GENL_ADMIN_PERM,
5517                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5518                                   NL80211_FLAG_NEED_RTNL,
5519         },
5520         {
5521                 .cmd = NL80211_CMD_NEW_KEY,
5522                 .doit = nl80211_new_key,
5523                 .policy = nl80211_policy,
5524                 .flags = GENL_ADMIN_PERM,
5525                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5526                                   NL80211_FLAG_NEED_RTNL,
5527         },
5528         {
5529                 .cmd = NL80211_CMD_DEL_KEY,
5530                 .doit = nl80211_del_key,
5531                 .policy = nl80211_policy,
5532                 .flags = GENL_ADMIN_PERM,
5533                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5534                                   NL80211_FLAG_NEED_RTNL,
5535         },
5536         {
5537                 .cmd = NL80211_CMD_SET_BEACON,
5538                 .policy = nl80211_policy,
5539                 .flags = GENL_ADMIN_PERM,
5540                 .doit = nl80211_addset_beacon,
5541                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5542                                   NL80211_FLAG_NEED_RTNL,
5543         },
5544         {
5545                 .cmd = NL80211_CMD_NEW_BEACON,
5546                 .policy = nl80211_policy,
5547                 .flags = GENL_ADMIN_PERM,
5548                 .doit = nl80211_addset_beacon,
5549                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5550                                   NL80211_FLAG_NEED_RTNL,
5551         },
5552         {
5553                 .cmd = NL80211_CMD_DEL_BEACON,
5554                 .policy = nl80211_policy,
5555                 .flags = GENL_ADMIN_PERM,
5556                 .doit = nl80211_del_beacon,
5557                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5558                                   NL80211_FLAG_NEED_RTNL,
5559         },
5560         {
5561                 .cmd = NL80211_CMD_GET_STATION,
5562                 .doit = nl80211_get_station,
5563                 .dumpit = nl80211_dump_station,
5564                 .policy = nl80211_policy,
5565                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5566                                   NL80211_FLAG_NEED_RTNL,
5567         },
5568         {
5569                 .cmd = NL80211_CMD_SET_STATION,
5570                 .doit = nl80211_set_station,
5571                 .policy = nl80211_policy,
5572                 .flags = GENL_ADMIN_PERM,
5573                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5574                                   NL80211_FLAG_NEED_RTNL,
5575         },
5576         {
5577                 .cmd = NL80211_CMD_NEW_STATION,
5578                 .doit = nl80211_new_station,
5579                 .policy = nl80211_policy,
5580                 .flags = GENL_ADMIN_PERM,
5581                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5582                                   NL80211_FLAG_NEED_RTNL,
5583         },
5584         {
5585                 .cmd = NL80211_CMD_DEL_STATION,
5586                 .doit = nl80211_del_station,
5587                 .policy = nl80211_policy,
5588                 .flags = GENL_ADMIN_PERM,
5589                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5590                                   NL80211_FLAG_NEED_RTNL,
5591         },
5592         {
5593                 .cmd = NL80211_CMD_GET_MPATH,
5594                 .doit = nl80211_get_mpath,
5595                 .dumpit = nl80211_dump_mpath,
5596                 .policy = nl80211_policy,
5597                 .flags = GENL_ADMIN_PERM,
5598                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5599                                   NL80211_FLAG_NEED_RTNL,
5600         },
5601         {
5602                 .cmd = NL80211_CMD_SET_MPATH,
5603                 .doit = nl80211_set_mpath,
5604                 .policy = nl80211_policy,
5605                 .flags = GENL_ADMIN_PERM,
5606                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5607                                   NL80211_FLAG_NEED_RTNL,
5608         },
5609         {
5610                 .cmd = NL80211_CMD_NEW_MPATH,
5611                 .doit = nl80211_new_mpath,
5612                 .policy = nl80211_policy,
5613                 .flags = GENL_ADMIN_PERM,
5614                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5615                                   NL80211_FLAG_NEED_RTNL,
5616         },
5617         {
5618                 .cmd = NL80211_CMD_DEL_MPATH,
5619                 .doit = nl80211_del_mpath,
5620                 .policy = nl80211_policy,
5621                 .flags = GENL_ADMIN_PERM,
5622                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5623                                   NL80211_FLAG_NEED_RTNL,
5624         },
5625         {
5626                 .cmd = NL80211_CMD_SET_BSS,
5627                 .doit = nl80211_set_bss,
5628                 .policy = nl80211_policy,
5629                 .flags = GENL_ADMIN_PERM,
5630                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5631                                   NL80211_FLAG_NEED_RTNL,
5632         },
5633         {
5634                 .cmd = NL80211_CMD_GET_REG,
5635                 .doit = nl80211_get_reg,
5636                 .policy = nl80211_policy,
5637                 /* can be retrieved by unprivileged users */
5638         },
5639         {
5640                 .cmd = NL80211_CMD_SET_REG,
5641                 .doit = nl80211_set_reg,
5642                 .policy = nl80211_policy,
5643                 .flags = GENL_ADMIN_PERM,
5644         },
5645         {
5646                 .cmd = NL80211_CMD_REQ_SET_REG,
5647                 .doit = nl80211_req_set_reg,
5648                 .policy = nl80211_policy,
5649                 .flags = GENL_ADMIN_PERM,
5650         },
5651         {
5652                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
5653                 .doit = nl80211_get_mesh_config,
5654                 .policy = nl80211_policy,
5655                 /* can be retrieved by unprivileged users */
5656                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5657                                   NL80211_FLAG_NEED_RTNL,
5658         },
5659         {
5660                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
5661                 .doit = nl80211_update_mesh_config,
5662                 .policy = nl80211_policy,
5663                 .flags = GENL_ADMIN_PERM,
5664                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5665                                   NL80211_FLAG_NEED_RTNL,
5666         },
5667         {
5668                 .cmd = NL80211_CMD_TRIGGER_SCAN,
5669                 .doit = nl80211_trigger_scan,
5670                 .policy = nl80211_policy,
5671                 .flags = GENL_ADMIN_PERM,
5672                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5673                                   NL80211_FLAG_NEED_RTNL,
5674         },
5675         {
5676                 .cmd = NL80211_CMD_GET_SCAN,
5677                 .policy = nl80211_policy,
5678                 .dumpit = nl80211_dump_scan,
5679         },
5680         {
5681                 .cmd = NL80211_CMD_START_SCHED_SCAN,
5682                 .doit = nl80211_start_sched_scan,
5683                 .policy = nl80211_policy,
5684                 .flags = GENL_ADMIN_PERM,
5685                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5686                                   NL80211_FLAG_NEED_RTNL,
5687         },
5688         {
5689                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
5690                 .doit = nl80211_stop_sched_scan,
5691                 .policy = nl80211_policy,
5692                 .flags = GENL_ADMIN_PERM,
5693                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5694                                   NL80211_FLAG_NEED_RTNL,
5695         },
5696         {
5697                 .cmd = NL80211_CMD_AUTHENTICATE,
5698                 .doit = nl80211_authenticate,
5699                 .policy = nl80211_policy,
5700                 .flags = GENL_ADMIN_PERM,
5701                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5702                                   NL80211_FLAG_NEED_RTNL,
5703         },
5704         {
5705                 .cmd = NL80211_CMD_ASSOCIATE,
5706                 .doit = nl80211_associate,
5707                 .policy = nl80211_policy,
5708                 .flags = GENL_ADMIN_PERM,
5709                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5710                                   NL80211_FLAG_NEED_RTNL,
5711         },
5712         {
5713                 .cmd = NL80211_CMD_DEAUTHENTICATE,
5714                 .doit = nl80211_deauthenticate,
5715                 .policy = nl80211_policy,
5716                 .flags = GENL_ADMIN_PERM,
5717                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5718                                   NL80211_FLAG_NEED_RTNL,
5719         },
5720         {
5721                 .cmd = NL80211_CMD_DISASSOCIATE,
5722                 .doit = nl80211_disassociate,
5723                 .policy = nl80211_policy,
5724                 .flags = GENL_ADMIN_PERM,
5725                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5726                                   NL80211_FLAG_NEED_RTNL,
5727         },
5728         {
5729                 .cmd = NL80211_CMD_JOIN_IBSS,
5730                 .doit = nl80211_join_ibss,
5731                 .policy = nl80211_policy,
5732                 .flags = GENL_ADMIN_PERM,
5733                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5734                                   NL80211_FLAG_NEED_RTNL,
5735         },
5736         {
5737                 .cmd = NL80211_CMD_LEAVE_IBSS,
5738                 .doit = nl80211_leave_ibss,
5739                 .policy = nl80211_policy,
5740                 .flags = GENL_ADMIN_PERM,
5741                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5742                                   NL80211_FLAG_NEED_RTNL,
5743         },
5744 #ifdef CONFIG_NL80211_TESTMODE
5745         {
5746                 .cmd = NL80211_CMD_TESTMODE,
5747                 .doit = nl80211_testmode_do,
5748                 .dumpit = nl80211_testmode_dump,
5749                 .policy = nl80211_policy,
5750                 .flags = GENL_ADMIN_PERM,
5751                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5752                                   NL80211_FLAG_NEED_RTNL,
5753         },
5754 #endif
5755         {
5756                 .cmd = NL80211_CMD_CONNECT,
5757                 .doit = nl80211_connect,
5758                 .policy = nl80211_policy,
5759                 .flags = GENL_ADMIN_PERM,
5760                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5761                                   NL80211_FLAG_NEED_RTNL,
5762         },
5763         {
5764                 .cmd = NL80211_CMD_DISCONNECT,
5765                 .doit = nl80211_disconnect,
5766                 .policy = nl80211_policy,
5767                 .flags = GENL_ADMIN_PERM,
5768                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5769                                   NL80211_FLAG_NEED_RTNL,
5770         },
5771         {
5772                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
5773                 .doit = nl80211_wiphy_netns,
5774                 .policy = nl80211_policy,
5775                 .flags = GENL_ADMIN_PERM,
5776                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5777                                   NL80211_FLAG_NEED_RTNL,
5778         },
5779         {
5780                 .cmd = NL80211_CMD_GET_SURVEY,
5781                 .policy = nl80211_policy,
5782                 .dumpit = nl80211_dump_survey,
5783         },
5784         {
5785                 .cmd = NL80211_CMD_SET_PMKSA,
5786                 .doit = nl80211_setdel_pmksa,
5787                 .policy = nl80211_policy,
5788                 .flags = GENL_ADMIN_PERM,
5789                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5790                                   NL80211_FLAG_NEED_RTNL,
5791         },
5792         {
5793                 .cmd = NL80211_CMD_DEL_PMKSA,
5794                 .doit = nl80211_setdel_pmksa,
5795                 .policy = nl80211_policy,
5796                 .flags = GENL_ADMIN_PERM,
5797                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5798                                   NL80211_FLAG_NEED_RTNL,
5799         },
5800         {
5801                 .cmd = NL80211_CMD_FLUSH_PMKSA,
5802                 .doit = nl80211_flush_pmksa,
5803                 .policy = nl80211_policy,
5804                 .flags = GENL_ADMIN_PERM,
5805                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5806                                   NL80211_FLAG_NEED_RTNL,
5807         },
5808         {
5809                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
5810                 .doit = nl80211_remain_on_channel,
5811                 .policy = nl80211_policy,
5812                 .flags = GENL_ADMIN_PERM,
5813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5814                                   NL80211_FLAG_NEED_RTNL,
5815         },
5816         {
5817                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
5818                 .doit = nl80211_cancel_remain_on_channel,
5819                 .policy = nl80211_policy,
5820                 .flags = GENL_ADMIN_PERM,
5821                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5822                                   NL80211_FLAG_NEED_RTNL,
5823         },
5824         {
5825                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
5826                 .doit = nl80211_set_tx_bitrate_mask,
5827                 .policy = nl80211_policy,
5828                 .flags = GENL_ADMIN_PERM,
5829                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5830                                   NL80211_FLAG_NEED_RTNL,
5831         },
5832         {
5833                 .cmd = NL80211_CMD_REGISTER_FRAME,
5834                 .doit = nl80211_register_mgmt,
5835                 .policy = nl80211_policy,
5836                 .flags = GENL_ADMIN_PERM,
5837                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5838                                   NL80211_FLAG_NEED_RTNL,
5839         },
5840         {
5841                 .cmd = NL80211_CMD_FRAME,
5842                 .doit = nl80211_tx_mgmt,
5843                 .policy = nl80211_policy,
5844                 .flags = GENL_ADMIN_PERM,
5845                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5846                                   NL80211_FLAG_NEED_RTNL,
5847         },
5848         {
5849                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
5850                 .doit = nl80211_tx_mgmt_cancel_wait,
5851                 .policy = nl80211_policy,
5852                 .flags = GENL_ADMIN_PERM,
5853                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5854                                   NL80211_FLAG_NEED_RTNL,
5855         },
5856         {
5857                 .cmd = NL80211_CMD_SET_POWER_SAVE,
5858                 .doit = nl80211_set_power_save,
5859                 .policy = nl80211_policy,
5860                 .flags = GENL_ADMIN_PERM,
5861                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5862                                   NL80211_FLAG_NEED_RTNL,
5863         },
5864         {
5865                 .cmd = NL80211_CMD_GET_POWER_SAVE,
5866                 .doit = nl80211_get_power_save,
5867                 .policy = nl80211_policy,
5868                 /* can be retrieved by unprivileged users */
5869                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5870                                   NL80211_FLAG_NEED_RTNL,
5871         },
5872         {
5873                 .cmd = NL80211_CMD_SET_CQM,
5874                 .doit = nl80211_set_cqm,
5875                 .policy = nl80211_policy,
5876                 .flags = GENL_ADMIN_PERM,
5877                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5878                                   NL80211_FLAG_NEED_RTNL,
5879         },
5880         {
5881                 .cmd = NL80211_CMD_SET_CHANNEL,
5882                 .doit = nl80211_set_channel,
5883                 .policy = nl80211_policy,
5884                 .flags = GENL_ADMIN_PERM,
5885                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5886                                   NL80211_FLAG_NEED_RTNL,
5887         },
5888         {
5889                 .cmd = NL80211_CMD_SET_WDS_PEER,
5890                 .doit = nl80211_set_wds_peer,
5891                 .policy = nl80211_policy,
5892                 .flags = GENL_ADMIN_PERM,
5893                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5894                                   NL80211_FLAG_NEED_RTNL,
5895         },
5896         {
5897                 .cmd = NL80211_CMD_JOIN_MESH,
5898                 .doit = nl80211_join_mesh,
5899                 .policy = nl80211_policy,
5900                 .flags = GENL_ADMIN_PERM,
5901                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5902                                   NL80211_FLAG_NEED_RTNL,
5903         },
5904         {
5905                 .cmd = NL80211_CMD_LEAVE_MESH,
5906                 .doit = nl80211_leave_mesh,
5907                 .policy = nl80211_policy,
5908                 .flags = GENL_ADMIN_PERM,
5909                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5910                                   NL80211_FLAG_NEED_RTNL,
5911         },
5912         {
5913                 .cmd = NL80211_CMD_GET_WOWLAN,
5914                 .doit = nl80211_get_wowlan,
5915                 .policy = nl80211_policy,
5916                 /* can be retrieved by unprivileged users */
5917                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5918                                   NL80211_FLAG_NEED_RTNL,
5919         },
5920         {
5921                 .cmd = NL80211_CMD_SET_WOWLAN,
5922                 .doit = nl80211_set_wowlan,
5923                 .policy = nl80211_policy,
5924                 .flags = GENL_ADMIN_PERM,
5925                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5926                                   NL80211_FLAG_NEED_RTNL,
5927         },
5928 };
5929
5930 static struct genl_multicast_group nl80211_mlme_mcgrp = {
5931         .name = "mlme",
5932 };
5933
5934 /* multicast groups */
5935 static struct genl_multicast_group nl80211_config_mcgrp = {
5936         .name = "config",
5937 };
5938 static struct genl_multicast_group nl80211_scan_mcgrp = {
5939         .name = "scan",
5940 };
5941 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
5942         .name = "regulatory",
5943 };
5944
5945 /* notification functions */
5946
5947 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
5948 {
5949         struct sk_buff *msg;
5950
5951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5952         if (!msg)
5953                 return;
5954
5955         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
5956                 nlmsg_free(msg);
5957                 return;
5958         }
5959
5960         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
5961                                 nl80211_config_mcgrp.id, GFP_KERNEL);
5962 }
5963
5964 static int nl80211_add_scan_req(struct sk_buff *msg,
5965                                 struct cfg80211_registered_device *rdev)
5966 {
5967         struct cfg80211_scan_request *req = rdev->scan_req;
5968         struct nlattr *nest;
5969         int i;
5970
5971         ASSERT_RDEV_LOCK(rdev);
5972
5973         if (WARN_ON(!req))
5974                 return 0;
5975
5976         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
5977         if (!nest)
5978                 goto nla_put_failure;
5979         for (i = 0; i < req->n_ssids; i++)
5980                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
5981         nla_nest_end(msg, nest);
5982
5983         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
5984         if (!nest)
5985                 goto nla_put_failure;
5986         for (i = 0; i < req->n_channels; i++)
5987                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
5988         nla_nest_end(msg, nest);
5989
5990         if (req->ie)
5991                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
5992
5993         return 0;
5994  nla_put_failure:
5995         return -ENOBUFS;
5996 }
5997
5998 static int nl80211_send_scan_msg(struct sk_buff *msg,
5999                                  struct cfg80211_registered_device *rdev,
6000                                  struct net_device *netdev,
6001                                  u32 pid, u32 seq, int flags,
6002                                  u32 cmd)
6003 {
6004         void *hdr;
6005
6006         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6007         if (!hdr)
6008                 return -1;
6009
6010         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6011         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6012
6013         /* ignore errors and send incomplete event anyway */
6014         nl80211_add_scan_req(msg, rdev);
6015
6016         return genlmsg_end(msg, hdr);
6017
6018  nla_put_failure:
6019         genlmsg_cancel(msg, hdr);
6020         return -EMSGSIZE;
6021 }
6022
6023 static int
6024 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6025                             struct cfg80211_registered_device *rdev,
6026                             struct net_device *netdev,
6027                             u32 pid, u32 seq, int flags, u32 cmd)
6028 {
6029         void *hdr;
6030
6031         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6032         if (!hdr)
6033                 return -1;
6034
6035         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6036         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6037
6038         return genlmsg_end(msg, hdr);
6039
6040  nla_put_failure:
6041         genlmsg_cancel(msg, hdr);
6042         return -EMSGSIZE;
6043 }
6044
6045 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
6046                              struct net_device *netdev)
6047 {
6048         struct sk_buff *msg;
6049
6050         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6051         if (!msg)
6052                 return;
6053
6054         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6055                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
6056                 nlmsg_free(msg);
6057                 return;
6058         }
6059
6060         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6061                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6062 }
6063
6064 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
6065                             struct net_device *netdev)
6066 {
6067         struct sk_buff *msg;
6068
6069         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6070         if (!msg)
6071                 return;
6072
6073         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6074                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
6075                 nlmsg_free(msg);
6076                 return;
6077         }
6078
6079         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6080                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6081 }
6082
6083 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
6084                                struct net_device *netdev)
6085 {
6086         struct sk_buff *msg;
6087
6088         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6089         if (!msg)
6090                 return;
6091
6092         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6093                                   NL80211_CMD_SCAN_ABORTED) < 0) {
6094                 nlmsg_free(msg);
6095                 return;
6096         }
6097
6098         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6099                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6100 }
6101
6102 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
6103                                      struct net_device *netdev)
6104 {
6105         struct sk_buff *msg;
6106
6107         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6108         if (!msg)
6109                 return;
6110
6111         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
6112                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
6113                 nlmsg_free(msg);
6114                 return;
6115         }
6116
6117         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6118                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6119 }
6120
6121 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
6122                              struct net_device *netdev, u32 cmd)
6123 {
6124         struct sk_buff *msg;
6125
6126         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6127         if (!msg)
6128                 return;
6129
6130         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
6131                 nlmsg_free(msg);
6132                 return;
6133         }
6134
6135         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6136                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6137 }
6138
6139 /*
6140  * This can happen on global regulatory changes or device specific settings
6141  * based on custom world regulatory domains.
6142  */
6143 void nl80211_send_reg_change_event(struct regulatory_request *request)
6144 {
6145         struct sk_buff *msg;
6146         void *hdr;
6147
6148         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6149         if (!msg)
6150                 return;
6151
6152         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
6153         if (!hdr) {
6154                 nlmsg_free(msg);
6155                 return;
6156         }
6157
6158         /* Userspace can always count this one always being set */
6159         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
6160
6161         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
6162                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6163                            NL80211_REGDOM_TYPE_WORLD);
6164         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
6165                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6166                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
6167         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
6168                  request->intersect)
6169                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6170                            NL80211_REGDOM_TYPE_INTERSECTION);
6171         else {
6172                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6173                            NL80211_REGDOM_TYPE_COUNTRY);
6174                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
6175         }
6176
6177         if (wiphy_idx_valid(request->wiphy_idx))
6178                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
6179
6180         if (genlmsg_end(msg, hdr) < 0) {
6181                 nlmsg_free(msg);
6182                 return;
6183         }
6184
6185         rcu_read_lock();
6186         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6187                                 GFP_ATOMIC);
6188         rcu_read_unlock();
6189
6190         return;
6191
6192 nla_put_failure:
6193         genlmsg_cancel(msg, hdr);
6194         nlmsg_free(msg);
6195 }
6196
6197 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
6198                                     struct net_device *netdev,
6199                                     const u8 *buf, size_t len,
6200                                     enum nl80211_commands cmd, gfp_t gfp)
6201 {
6202         struct sk_buff *msg;
6203         void *hdr;
6204
6205         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6206         if (!msg)
6207                 return;
6208
6209         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6210         if (!hdr) {
6211                 nlmsg_free(msg);
6212                 return;
6213         }
6214
6215         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6216         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6217         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6218
6219         if (genlmsg_end(msg, hdr) < 0) {
6220                 nlmsg_free(msg);
6221                 return;
6222         }
6223
6224         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6225                                 nl80211_mlme_mcgrp.id, gfp);
6226         return;
6227
6228  nla_put_failure:
6229         genlmsg_cancel(msg, hdr);
6230         nlmsg_free(msg);
6231 }
6232
6233 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
6234                           struct net_device *netdev, const u8 *buf,
6235                           size_t len, gfp_t gfp)
6236 {
6237         nl80211_send_mlme_event(rdev, netdev, buf, len,
6238                                 NL80211_CMD_AUTHENTICATE, gfp);
6239 }
6240
6241 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
6242                            struct net_device *netdev, const u8 *buf,
6243                            size_t len, gfp_t gfp)
6244 {
6245         nl80211_send_mlme_event(rdev, netdev, buf, len,
6246                                 NL80211_CMD_ASSOCIATE, gfp);
6247 }
6248
6249 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
6250                          struct net_device *netdev, const u8 *buf,
6251                          size_t len, gfp_t gfp)
6252 {
6253         nl80211_send_mlme_event(rdev, netdev, buf, len,
6254                                 NL80211_CMD_DEAUTHENTICATE, gfp);
6255 }
6256
6257 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
6258                            struct net_device *netdev, const u8 *buf,
6259                            size_t len, gfp_t gfp)
6260 {
6261         nl80211_send_mlme_event(rdev, netdev, buf, len,
6262                                 NL80211_CMD_DISASSOCIATE, gfp);
6263 }
6264
6265 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
6266                                 struct net_device *netdev, const u8 *buf,
6267                                 size_t len, gfp_t gfp)
6268 {
6269         nl80211_send_mlme_event(rdev, netdev, buf, len,
6270                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
6271 }
6272
6273 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
6274                                   struct net_device *netdev, const u8 *buf,
6275                                   size_t len, gfp_t gfp)
6276 {
6277         nl80211_send_mlme_event(rdev, netdev, buf, len,
6278                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
6279 }
6280
6281 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
6282                                       struct net_device *netdev, int cmd,
6283                                       const u8 *addr, gfp_t gfp)
6284 {
6285         struct sk_buff *msg;
6286         void *hdr;
6287
6288         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6289         if (!msg)
6290                 return;
6291
6292         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6293         if (!hdr) {
6294                 nlmsg_free(msg);
6295                 return;
6296         }
6297
6298         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6299         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6300         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
6301         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6302
6303         if (genlmsg_end(msg, hdr) < 0) {
6304                 nlmsg_free(msg);
6305                 return;
6306         }
6307
6308         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6309                                 nl80211_mlme_mcgrp.id, gfp);
6310         return;
6311
6312  nla_put_failure:
6313         genlmsg_cancel(msg, hdr);
6314         nlmsg_free(msg);
6315 }
6316
6317 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
6318                                struct net_device *netdev, const u8 *addr,
6319                                gfp_t gfp)
6320 {
6321         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
6322                                   addr, gfp);
6323 }
6324
6325 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
6326                                 struct net_device *netdev, const u8 *addr,
6327                                 gfp_t gfp)
6328 {
6329         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
6330                                   addr, gfp);
6331 }
6332
6333 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
6334                                  struct net_device *netdev, const u8 *bssid,
6335                                  const u8 *req_ie, size_t req_ie_len,
6336                                  const u8 *resp_ie, size_t resp_ie_len,
6337                                  u16 status, gfp_t gfp)
6338 {
6339         struct sk_buff *msg;
6340         void *hdr;
6341
6342         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6343         if (!msg)
6344                 return;
6345
6346         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
6347         if (!hdr) {
6348                 nlmsg_free(msg);
6349                 return;
6350         }
6351
6352         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6353         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6354         if (bssid)
6355                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6356         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
6357         if (req_ie)
6358                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6359         if (resp_ie)
6360                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6361
6362         if (genlmsg_end(msg, hdr) < 0) {
6363                 nlmsg_free(msg);
6364                 return;
6365         }
6366
6367         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6368                                 nl80211_mlme_mcgrp.id, gfp);
6369         return;
6370
6371  nla_put_failure:
6372         genlmsg_cancel(msg, hdr);
6373         nlmsg_free(msg);
6374
6375 }
6376
6377 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
6378                          struct net_device *netdev, const u8 *bssid,
6379                          const u8 *req_ie, size_t req_ie_len,
6380                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
6381 {
6382         struct sk_buff *msg;
6383         void *hdr;
6384
6385         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6386         if (!msg)
6387                 return;
6388
6389         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
6390         if (!hdr) {
6391                 nlmsg_free(msg);
6392                 return;
6393         }
6394
6395         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6396         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6397         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6398         if (req_ie)
6399                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6400         if (resp_ie)
6401                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6402
6403         if (genlmsg_end(msg, hdr) < 0) {
6404                 nlmsg_free(msg);
6405                 return;
6406         }
6407
6408         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6409                                 nl80211_mlme_mcgrp.id, gfp);
6410         return;
6411
6412  nla_put_failure:
6413         genlmsg_cancel(msg, hdr);
6414         nlmsg_free(msg);
6415
6416 }
6417
6418 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
6419                                struct net_device *netdev, u16 reason,
6420                                const u8 *ie, size_t ie_len, bool from_ap)
6421 {
6422         struct sk_buff *msg;
6423         void *hdr;
6424
6425         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6426         if (!msg)
6427                 return;
6428
6429         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
6430         if (!hdr) {
6431                 nlmsg_free(msg);
6432                 return;
6433         }
6434
6435         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6436         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6437         if (from_ap && reason)
6438                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
6439         if (from_ap)
6440                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
6441         if (ie)
6442                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
6443
6444         if (genlmsg_end(msg, hdr) < 0) {
6445                 nlmsg_free(msg);
6446                 return;
6447         }
6448
6449         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6450                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
6451         return;
6452
6453  nla_put_failure:
6454         genlmsg_cancel(msg, hdr);
6455         nlmsg_free(msg);
6456
6457 }
6458
6459 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
6460                              struct net_device *netdev, const u8 *bssid,
6461                              gfp_t gfp)
6462 {
6463         struct sk_buff *msg;
6464         void *hdr;
6465
6466         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6467         if (!msg)
6468                 return;
6469
6470         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
6471         if (!hdr) {
6472                 nlmsg_free(msg);
6473                 return;
6474         }
6475
6476         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6477         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6478         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6479
6480         if (genlmsg_end(msg, hdr) < 0) {
6481                 nlmsg_free(msg);
6482                 return;
6483         }
6484
6485         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6486                                 nl80211_mlme_mcgrp.id, gfp);
6487         return;
6488
6489  nla_put_failure:
6490         genlmsg_cancel(msg, hdr);
6491         nlmsg_free(msg);
6492 }
6493
6494 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
6495                 struct net_device *netdev,
6496                 const u8 *macaddr, const u8* ie, u8 ie_len,
6497                 gfp_t gfp)
6498 {
6499         struct sk_buff *msg;
6500         void *hdr;
6501
6502         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6503         if (!msg)
6504                 return;
6505
6506         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
6507         if (!hdr) {
6508                 nlmsg_free(msg);
6509                 return;
6510         }
6511
6512         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6513         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6514         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
6515         if (ie_len && ie)
6516                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
6517
6518         if (genlmsg_end(msg, hdr) < 0) {
6519                 nlmsg_free(msg);
6520                 return;
6521         }
6522
6523         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6524                                 nl80211_mlme_mcgrp.id, gfp);
6525         return;
6526
6527  nla_put_failure:
6528         genlmsg_cancel(msg, hdr);
6529         nlmsg_free(msg);
6530 }
6531
6532 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
6533                                  struct net_device *netdev, const u8 *addr,
6534                                  enum nl80211_key_type key_type, int key_id,
6535                                  const u8 *tsc, gfp_t gfp)
6536 {
6537         struct sk_buff *msg;
6538         void *hdr;
6539
6540         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6541         if (!msg)
6542                 return;
6543
6544         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
6545         if (!hdr) {
6546                 nlmsg_free(msg);
6547                 return;
6548         }
6549
6550         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6551         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6552         if (addr)
6553                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6554         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
6555         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
6556         if (tsc)
6557                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
6558
6559         if (genlmsg_end(msg, hdr) < 0) {
6560                 nlmsg_free(msg);
6561                 return;
6562         }
6563
6564         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6565                                 nl80211_mlme_mcgrp.id, gfp);
6566         return;
6567
6568  nla_put_failure:
6569         genlmsg_cancel(msg, hdr);
6570         nlmsg_free(msg);
6571 }
6572
6573 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
6574                                     struct ieee80211_channel *channel_before,
6575                                     struct ieee80211_channel *channel_after)
6576 {
6577         struct sk_buff *msg;
6578         void *hdr;
6579         struct nlattr *nl_freq;
6580
6581         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
6582         if (!msg)
6583                 return;
6584
6585         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
6586         if (!hdr) {
6587                 nlmsg_free(msg);
6588                 return;
6589         }
6590
6591         /*
6592          * Since we are applying the beacon hint to a wiphy we know its
6593          * wiphy_idx is valid
6594          */
6595         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
6596
6597         /* Before */
6598         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
6599         if (!nl_freq)
6600                 goto nla_put_failure;
6601         if (nl80211_msg_put_channel(msg, channel_before))
6602                 goto nla_put_failure;
6603         nla_nest_end(msg, nl_freq);
6604
6605         /* After */
6606         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
6607         if (!nl_freq)
6608                 goto nla_put_failure;
6609         if (nl80211_msg_put_channel(msg, channel_after))
6610                 goto nla_put_failure;
6611         nla_nest_end(msg, nl_freq);
6612
6613         if (genlmsg_end(msg, hdr) < 0) {
6614                 nlmsg_free(msg);
6615                 return;
6616         }
6617
6618         rcu_read_lock();
6619         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6620                                 GFP_ATOMIC);
6621         rcu_read_unlock();
6622
6623         return;
6624
6625 nla_put_failure:
6626         genlmsg_cancel(msg, hdr);
6627         nlmsg_free(msg);
6628 }
6629
6630 static void nl80211_send_remain_on_chan_event(
6631         int cmd, struct cfg80211_registered_device *rdev,
6632         struct net_device *netdev, u64 cookie,
6633         struct ieee80211_channel *chan,
6634         enum nl80211_channel_type channel_type,
6635         unsigned int duration, gfp_t gfp)
6636 {
6637         struct sk_buff *msg;
6638         void *hdr;
6639
6640         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6641         if (!msg)
6642                 return;
6643
6644         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6645         if (!hdr) {
6646                 nlmsg_free(msg);
6647                 return;
6648         }
6649
6650         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6651         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6652         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
6653         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
6654         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6655
6656         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
6657                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
6658
6659         if (genlmsg_end(msg, hdr) < 0) {
6660                 nlmsg_free(msg);
6661                 return;
6662         }
6663
6664         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6665                                 nl80211_mlme_mcgrp.id, gfp);
6666         return;
6667
6668  nla_put_failure:
6669         genlmsg_cancel(msg, hdr);
6670         nlmsg_free(msg);
6671 }
6672
6673 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
6674                                     struct net_device *netdev, u64 cookie,
6675                                     struct ieee80211_channel *chan,
6676                                     enum nl80211_channel_type channel_type,
6677                                     unsigned int duration, gfp_t gfp)
6678 {
6679         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
6680                                           rdev, netdev, cookie, chan,
6681                                           channel_type, duration, gfp);
6682 }
6683
6684 void nl80211_send_remain_on_channel_cancel(
6685         struct cfg80211_registered_device *rdev, struct net_device *netdev,
6686         u64 cookie, struct ieee80211_channel *chan,
6687         enum nl80211_channel_type channel_type, gfp_t gfp)
6688 {
6689         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6690                                           rdev, netdev, cookie, chan,
6691                                           channel_type, 0, gfp);
6692 }
6693
6694 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
6695                             struct net_device *dev, const u8 *mac_addr,
6696                             struct station_info *sinfo, gfp_t gfp)
6697 {
6698         struct sk_buff *msg;
6699
6700         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6701         if (!msg)
6702                 return;
6703
6704         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
6705                 nlmsg_free(msg);
6706                 return;
6707         }
6708
6709         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6710                                 nl80211_mlme_mcgrp.id, gfp);
6711 }
6712
6713 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
6714                                 struct net_device *dev, const u8 *mac_addr,
6715                                 gfp_t gfp)
6716 {
6717         struct sk_buff *msg;
6718         void *hdr;
6719
6720         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6721         if (!msg)
6722                 return;
6723
6724         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
6725         if (!hdr) {
6726                 nlmsg_free(msg);
6727                 return;
6728         }
6729
6730         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
6731         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
6732
6733         if (genlmsg_end(msg, hdr) < 0) {
6734                 nlmsg_free(msg);
6735                 return;
6736         }
6737
6738         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6739                                 nl80211_mlme_mcgrp.id, gfp);
6740         return;
6741
6742  nla_put_failure:
6743         genlmsg_cancel(msg, hdr);
6744         nlmsg_free(msg);
6745 }
6746
6747 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
6748                       struct net_device *netdev, u32 nlpid,
6749                       int freq, const u8 *buf, size_t len, gfp_t gfp)
6750 {
6751         struct sk_buff *msg;
6752         void *hdr;
6753         int err;
6754
6755         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6756         if (!msg)
6757                 return -ENOMEM;
6758
6759         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
6760         if (!hdr) {
6761                 nlmsg_free(msg);
6762                 return -ENOMEM;
6763         }
6764
6765         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6766         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6767         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
6768         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6769
6770         err = genlmsg_end(msg, hdr);
6771         if (err < 0) {
6772                 nlmsg_free(msg);
6773                 return err;
6774         }
6775
6776         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
6777         if (err < 0)
6778                 return err;
6779         return 0;
6780
6781  nla_put_failure:
6782         genlmsg_cancel(msg, hdr);
6783         nlmsg_free(msg);
6784         return -ENOBUFS;
6785 }
6786
6787 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
6788                                  struct net_device *netdev, u64 cookie,
6789                                  const u8 *buf, size_t len, bool ack,
6790                                  gfp_t gfp)
6791 {
6792         struct sk_buff *msg;
6793         void *hdr;
6794
6795         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6796         if (!msg)
6797                 return;
6798
6799         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
6800         if (!hdr) {
6801                 nlmsg_free(msg);
6802                 return;
6803         }
6804
6805         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6806         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6807         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6808         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
6809         if (ack)
6810                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
6811
6812         if (genlmsg_end(msg, hdr) < 0) {
6813                 nlmsg_free(msg);
6814                 return;
6815         }
6816
6817         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
6818         return;
6819
6820  nla_put_failure:
6821         genlmsg_cancel(msg, hdr);
6822         nlmsg_free(msg);
6823 }
6824
6825 void
6826 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
6827                              struct net_device *netdev,
6828                              enum nl80211_cqm_rssi_threshold_event rssi_event,
6829                              gfp_t gfp)
6830 {
6831         struct sk_buff *msg;
6832         struct nlattr *pinfoattr;
6833         void *hdr;
6834
6835         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6836         if (!msg)
6837                 return;
6838
6839         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6840         if (!hdr) {
6841                 nlmsg_free(msg);
6842                 return;
6843         }
6844
6845         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6846         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6847
6848         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6849         if (!pinfoattr)
6850                 goto nla_put_failure;
6851
6852         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
6853                     rssi_event);
6854
6855         nla_nest_end(msg, pinfoattr);
6856
6857         if (genlmsg_end(msg, hdr) < 0) {
6858                 nlmsg_free(msg);
6859                 return;
6860         }
6861
6862         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6863                                 nl80211_mlme_mcgrp.id, gfp);
6864         return;
6865
6866  nla_put_failure:
6867         genlmsg_cancel(msg, hdr);
6868         nlmsg_free(msg);
6869 }
6870
6871 void
6872 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
6873                                 struct net_device *netdev, const u8 *peer,
6874                                 u32 num_packets, gfp_t gfp)
6875 {
6876         struct sk_buff *msg;
6877         struct nlattr *pinfoattr;
6878         void *hdr;
6879
6880         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6881         if (!msg)
6882                 return;
6883
6884         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
6885         if (!hdr) {
6886                 nlmsg_free(msg);
6887                 return;
6888         }
6889
6890         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6891         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6892         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
6893
6894         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
6895         if (!pinfoattr)
6896                 goto nla_put_failure;
6897
6898         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
6899
6900         nla_nest_end(msg, pinfoattr);
6901
6902         if (genlmsg_end(msg, hdr) < 0) {
6903                 nlmsg_free(msg);
6904                 return;
6905         }
6906
6907         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6908                                 nl80211_mlme_mcgrp.id, gfp);
6909         return;
6910
6911  nla_put_failure:
6912         genlmsg_cancel(msg, hdr);
6913         nlmsg_free(msg);
6914 }
6915
6916 static int nl80211_netlink_notify(struct notifier_block * nb,
6917                                   unsigned long state,
6918                                   void *_notify)
6919 {
6920         struct netlink_notify *notify = _notify;
6921         struct cfg80211_registered_device *rdev;
6922         struct wireless_dev *wdev;
6923
6924         if (state != NETLINK_URELEASE)
6925                 return NOTIFY_DONE;
6926
6927         rcu_read_lock();
6928
6929         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
6930                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
6931                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
6932
6933         rcu_read_unlock();
6934
6935         return NOTIFY_DONE;
6936 }
6937
6938 static struct notifier_block nl80211_netlink_notifier = {
6939         .notifier_call = nl80211_netlink_notify,
6940 };
6941
6942 /* initialisation/exit functions */
6943
6944 int nl80211_init(void)
6945 {
6946         int err;
6947
6948         err = genl_register_family_with_ops(&nl80211_fam,
6949                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
6950         if (err)
6951                 return err;
6952
6953         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
6954         if (err)
6955                 goto err_out;
6956
6957         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
6958         if (err)
6959                 goto err_out;
6960
6961         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
6962         if (err)
6963                 goto err_out;
6964
6965         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
6966         if (err)
6967                 goto err_out;
6968
6969 #ifdef CONFIG_NL80211_TESTMODE
6970         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
6971         if (err)
6972                 goto err_out;
6973 #endif
6974
6975         err = netlink_register_notifier(&nl80211_netlink_notifier);
6976         if (err)
6977                 goto err_out;
6978
6979         return 0;
6980  err_out:
6981         genl_unregister_family(&nl80211_fam);
6982         return err;
6983 }
6984
6985 void nl80211_exit(void)
6986 {
6987         netlink_unregister_notifier(&nl80211_netlink_notifier);
6988         genl_unregister_family(&nl80211_fam);
6989 }