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 bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  27 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  28                                    struct genl_info *info,
  29                                    struct cfg80211_crypto_settings *settings,
  30                                    int cipher_limit);
  31
  32 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  33                             struct genl_info *info);
  34 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  35                               struct genl_info *info);
  36
  37 /* the netlink family */
  38 static struct genl_family nl80211_fam = {
  39         .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  40         .name = "nl80211",      /* have users key off the name instead */
  41         .hdrsize = 0,           /* no private header */
  42         .version = 1,           /* no particular meaning now */
  43         .maxattr = NL80211_ATTR_MAX,
  44         .netnsok = true,
  45         .pre_doit = nl80211_pre_doit,
  46         .post_doit = nl80211_post_doit,
  47 };
  48
  49 /* internal helper: get rdev and dev */
  50 static int get_rdev_dev_by_info_ifindex(struct genl_info *info,
  51                                        struct cfg80211_registered_device **rdev,
  52                                        struct net_device **dev)
  53 {
  54         struct nlattr **attrs = info->attrs;
  55         int ifindex;
  56
  57         if (!attrs[NL80211_ATTR_IFINDEX])
  58                 return -EINVAL;
  59
  60         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  61         *dev = dev_get_by_index(genl_info_net(info), ifindex);
  62         if (!*dev)
  63                 return -ENODEV;
  64
  65         *rdev = cfg80211_get_dev_from_ifindex(genl_info_net(info), ifindex);
  66         if (IS_ERR(*rdev)) {
  67                 dev_put(*dev);
  68                 return PTR_ERR(*rdev);
  69         }
  70
  71         return 0;
  72 }
  73
  74 /* policy for the attributes */
  75 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  76         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  77         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  78                                       .len = 20-1 },
  79         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  80         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  81         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  82         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  83         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  84         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  85         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  86         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  87
  88         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  89         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  90         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  91
  92         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
  93         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
  94
  95         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  96         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  97                                     .len = WLAN_MAX_KEY_LEN },
  98         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  99         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 100         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 101         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 102         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 103
 104         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 105         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 106         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 107                                        .len = IEEE80211_MAX_DATA_LEN },
 108         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 109                                        .len = IEEE80211_MAX_DATA_LEN },
 110         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 111         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 112         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 113         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 114                                                .len = NL80211_MAX_SUPP_RATES },
 115         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 116         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 117         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 118         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 119                                 .len = IEEE80211_MAX_MESH_ID_LEN },
 120         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 121
 122         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 123         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 124
 125         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 126         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 127         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 128         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 129                                            .len = NL80211_MAX_SUPP_RATES },
 130         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 131
 132         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 133         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 134
 135         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 136
 137         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 138         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 139                               .len = IEEE80211_MAX_DATA_LEN },
 140         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 141         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 142
 143         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 144                                 .len = IEEE80211_MAX_SSID_LEN },
 145         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 146         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 147         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 148         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 149         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 150         [NL80211_ATTR_STA_FLAGS2] = {
 151                 .len = sizeof(struct nl80211_sta_flag_update),
 152         },
 153         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 154         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 155         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 156         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 157         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 158         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 159         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 160         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 161         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 162                                  .len = WLAN_PMKID_LEN },
 163         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 164         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 165         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 166         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 167                                  .len = IEEE80211_MAX_DATA_LEN },
 168         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 169         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 170         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 171         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 172         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 173         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 174         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 175         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 176         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 178         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 179         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 180         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 181         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 182         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 183         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 184         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 185         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 186         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 187         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 188                                          .len = IEEE80211_MAX_DATA_LEN },
 189         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 190                                          .len = IEEE80211_MAX_DATA_LEN },
 191         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 192         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 193         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 194         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 195         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 196         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 197         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 198         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 199 };
 200
 201 /* policy for the key attributes */
 202 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 203         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 204         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 205         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 206         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 8 },
 207         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 208         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 209         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 210         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 211 };
 212
 213 /* policy for the key default flags */
 214 static const struct nla_policy
 215 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 216         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 217         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 218 };
 219
 220 /* policy for WoWLAN attributes */
 221 static const struct nla_policy
 222 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 223         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 224         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 225         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 226         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 227         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 228         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 229         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 230         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 231 };
 232
 233 /* policy for GTK rekey offload attributes */
 234 static const struct nla_policy
 235 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 236         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 237         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 238         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 239 };
 240
 241 static const struct nla_policy
 242 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 243         [NL80211_ATTR_SCHED_SCAN_MATCH_SSID] = { .type = NLA_BINARY,
 244                                                  .len = IEEE80211_MAX_SSID_LEN },
 245 };
 246
 247 /* ifidx get helper */
 248 static int nl80211_get_ifidx(struct netlink_callback *cb)
 249 {
 250         int res;
 251
 252         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 253                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 254                           nl80211_policy);
 255         if (res)
 256                 return res;
 257
 258         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 259                 return -EINVAL;
 260
 261         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 262         if (!res)
 263                 return -EINVAL;
 264         return res;
 265 }
 266
 267 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 268                                        struct netlink_callback *cb,
 269                                        struct cfg80211_registered_device **rdev,
 270                                        struct net_device **dev)
 271 {
 272         int ifidx = cb->args[0];
 273         int err;
 274
 275         if (!ifidx)
 276                 ifidx = nl80211_get_ifidx(cb);
 277         if (ifidx < 0)
 278                 return ifidx;
 279
 280         cb->args[0] = ifidx;
 281
 282         rtnl_lock();
 283
 284         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 285         if (!*dev) {
 286                 err = -ENODEV;
 287                 goto out_rtnl;
 288         }
 289
 290         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 291         if (IS_ERR(*rdev)) {
 292                 err = PTR_ERR(*rdev);
 293                 goto out_rtnl;
 294         }
 295
 296         return 0;
 297  out_rtnl:
 298         rtnl_unlock();
 299         return err;
 300 }
 301
 302 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 303 {
 304         cfg80211_unlock_rdev(rdev);
 305         rtnl_unlock();
 306 }
 307
 308 /* IE validation */
 309 static bool is_valid_ie_attr(const struct nlattr *attr)
 310 {
 311         const u8 *pos;
 312         int len;
 313
 314         if (!attr)
 315                 return true;
 316
 317         pos = nla_data(attr);
 318         len = nla_len(attr);
 319
 320         while (len) {
 321                 u8 elemlen;
 322
 323                 if (len < 2)
 324                         return false;
 325                 len -= 2;
 326
 327                 elemlen = pos[1];
 328                 if (elemlen > len)
 329                         return false;
 330
 331                 len -= elemlen;
 332                 pos += 2 + elemlen;
 333         }
 334
 335         return true;
 336 }
 337
 338 /* message building helper */
 339 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 340                                    int flags, u8 cmd)
 341 {
 342         /* since there is no private header just add the generic one */
 343         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 344 }
 345
 346 static int nl80211_msg_put_channel(struct sk_buff *msg,
 347                                    struct ieee80211_channel *chan)
 348 {
 349         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 350                     chan->center_freq);
 351
 352         if (chan->flags & IEEE80211_CHAN_DISABLED)
 353                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);
 354         if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)
 355                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);
 356         if (chan->flags & IEEE80211_CHAN_NO_IBSS)
 357                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);
 358         if (chan->flags & IEEE80211_CHAN_RADAR)
 359                 NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);
 360
 361         NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 362                     DBM_TO_MBM(chan->max_power));
 363
 364         return 0;
 365
 366  nla_put_failure:
 367         return -ENOBUFS;
 368 }
 369
 370 /* netlink command implementations */
 371
 372 struct key_parse {
 373         struct key_params p;
 374         int idx;
 375         int type;
 376         bool def, defmgmt;
 377         bool def_uni, def_multi;
 378 };
 379
 380 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 381 {
 382         struct nlattr *tb[NL80211_KEY_MAX + 1];
 383         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 384                                    nl80211_key_policy);
 385         if (err)
 386                 return err;
 387
 388         k->def = !!tb[NL80211_KEY_DEFAULT];
 389         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 390
 391         if (k->def) {
 392                 k->def_uni = true;
 393                 k->def_multi = true;
 394         }
 395         if (k->defmgmt)
 396                 k->def_multi = true;
 397
 398         if (tb[NL80211_KEY_IDX])
 399                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 400
 401         if (tb[NL80211_KEY_DATA]) {
 402                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 403                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 404         }
 405
 406         if (tb[NL80211_KEY_SEQ]) {
 407                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 408                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 409         }
 410
 411         if (tb[NL80211_KEY_CIPHER])
 412                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 413
 414         if (tb[NL80211_KEY_TYPE]) {
 415                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 416                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 417                         return -EINVAL;
 418         }
 419
 420         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 421                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 422                 int err = nla_parse_nested(kdt,
 423                                            NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 424                                            tb[NL80211_KEY_DEFAULT_TYPES],
 425                                            nl80211_key_default_policy);
 426                 if (err)
 427                         return err;
 428
 429                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 430                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 431         }
 432
 433         return 0;
 434 }
 435
 436 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 437 {
 438         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 439                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 440                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 441         }
 442
 443         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 444                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 445                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 446         }
 447
 448         if (info->attrs[NL80211_ATTR_KEY_IDX])
 449                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 450
 451         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 452                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 453
 454         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 455         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 456
 457         if (k->def) {
 458                 k->def_uni = true;
 459                 k->def_multi = true;
 460         }
 461         if (k->defmgmt)
 462                 k->def_multi = true;
 463
 464         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 465                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 466                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 467                         return -EINVAL;
 468         }
 469
 470         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 471                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 472                 int err = nla_parse_nested(
 473                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 474                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 475                                 nl80211_key_default_policy);
 476                 if (err)
 477                         return err;
 478
 479                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 480                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 481         }
 482
 483         return 0;
 484 }
 485
 486 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 487 {
 488         int err;
 489
 490         memset(k, 0, sizeof(*k));
 491         k->idx = -1;
 492         k->type = -1;
 493
 494         if (info->attrs[NL80211_ATTR_KEY])
 495                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 496         else
 497                 err = nl80211_parse_key_old(info, k);
 498
 499         if (err)
 500                 return err;
 501
 502         if (k->def && k->defmgmt)
 503                 return -EINVAL;
 504
 505         if (k->defmgmt) {
 506                 if (k->def_uni || !k->def_multi)
 507                         return -EINVAL;
 508         }
 509
 510         if (k->idx != -1) {
 511                 if (k->defmgmt) {
 512                         if (k->idx < 4 || k->idx > 5)
 513                                 return -EINVAL;
 514                 } else if (k->def) {
 515                         if (k->idx < 0 || k->idx > 3)
 516                                 return -EINVAL;
 517                 } else {
 518                         if (k->idx < 0 || k->idx > 5)
 519                                 return -EINVAL;
 520                 }
 521         }
 522
 523         return 0;
 524 }
 525
 526 static struct cfg80211_cached_keys *
 527 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 528                        struct nlattr *keys)
 529 {
 530         struct key_parse parse;
 531         struct nlattr *key;
 532         struct cfg80211_cached_keys *result;
 533         int rem, err, def = 0;
 534
 535         result = kzalloc(sizeof(*result), GFP_KERNEL);
 536         if (!result)
 537                 return ERR_PTR(-ENOMEM);
 538
 539         result->def = -1;
 540         result->defmgmt = -1;
 541
 542         nla_for_each_nested(key, keys, rem) {
 543                 memset(&parse, 0, sizeof(parse));
 544                 parse.idx = -1;
 545
 546                 err = nl80211_parse_key_new(key, &parse);
 547                 if (err)
 548                         goto error;
 549                 err = -EINVAL;
 550                 if (!parse.p.key)
 551                         goto error;
 552                 if (parse.idx < 0 || parse.idx > 4)
 553                         goto error;
 554                 if (parse.def) {
 555                         if (def)
 556                                 goto error;
 557                         def = 1;
 558                         result->def = parse.idx;
 559                         if (!parse.def_uni || !parse.def_multi)
 560                                 goto error;
 561                 } else if (parse.defmgmt)
 562                         goto error;
 563                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 564                                                      parse.idx, false, NULL);
 565                 if (err)
 566                         goto error;
 567                 result->params[parse.idx].cipher = parse.p.cipher;
 568                 result->params[parse.idx].key_len = parse.p.key_len;
 569                 result->params[parse.idx].key = result->data[parse.idx];
 570                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 571         }
 572
 573         return result;
 574  error:
 575         kfree(result);
 576         return ERR_PTR(err);
 577 }
 578
 579 static int nl80211_key_allowed(struct wireless_dev *wdev)
 580 {
 581         ASSERT_WDEV_LOCK(wdev);
 582
 583         switch (wdev->iftype) {
 584         case NL80211_IFTYPE_AP:
 585         case NL80211_IFTYPE_AP_VLAN:
 586         case NL80211_IFTYPE_P2P_GO:
 587         case NL80211_IFTYPE_MESH_POINT:
 588                 break;
 589         case NL80211_IFTYPE_ADHOC:
 590                 if (!wdev->current_bss)
 591                         return -ENOLINK;
 592                 break;
 593         case NL80211_IFTYPE_STATION:
 594         case NL80211_IFTYPE_P2P_CLIENT:
 595                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 596                         return -ENOLINK;
 597                 break;
 598         default:
 599                 return -EINVAL;
 600         }
 601
 602         return 0;
 603 }
 604
 605 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 606 {
 607         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 608         int i;
 609
 610         if (!nl_modes)
 611                 goto nla_put_failure;
 612
 613         i = 0;
 614         while (ifmodes) {
 615                 if (ifmodes & 1)
 616                         NLA_PUT_FLAG(msg, i);
 617                 ifmodes >>= 1;
 618                 i++;
 619         }
 620
 621         nla_nest_end(msg, nl_modes);
 622         return 0;
 623
 624 nla_put_failure:
 625         return -ENOBUFS;
 626 }
 627
 628 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 629                                           struct sk_buff *msg)
 630 {
 631         struct nlattr *nl_combis;
 632         int i, j;
 633
 634         nl_combis = nla_nest_start(msg,
 635                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 636         if (!nl_combis)
 637                 goto nla_put_failure;
 638
 639         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 640                 const struct ieee80211_iface_combination *c;
 641                 struct nlattr *nl_combi, *nl_limits;
 642
 643                 c = &wiphy->iface_combinations[i];
 644
 645                 nl_combi = nla_nest_start(msg, i + 1);
 646                 if (!nl_combi)
 647                         goto nla_put_failure;
 648
 649                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 650                 if (!nl_limits)
 651                         goto nla_put_failure;
 652
 653                 for (j = 0; j < c->n_limits; j++) {
 654                         struct nlattr *nl_limit;
 655
 656                         nl_limit = nla_nest_start(msg, j + 1);
 657                         if (!nl_limit)
 658                                 goto nla_put_failure;
 659                         NLA_PUT_U32(msg, NL80211_IFACE_LIMIT_MAX,
 660                                     c->limits[j].max);
 661                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 662                                                 c->limits[j].types))
 663                                 goto nla_put_failure;
 664                         nla_nest_end(msg, nl_limit);
 665                 }
 666
 667                 nla_nest_end(msg, nl_limits);
 668
 669                 if (c->beacon_int_infra_match)
 670                         NLA_PUT_FLAG(msg,
 671                                 NL80211_IFACE_COMB_STA_AP_BI_MATCH);
 672                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 673                             c->num_different_channels);
 674                 NLA_PUT_U32(msg, NL80211_IFACE_COMB_MAXNUM,
 675                             c->max_interfaces);
 676
 677                 nla_nest_end(msg, nl_combi);
 678         }
 679
 680         nla_nest_end(msg, nl_combis);
 681
 682         return 0;
 683 nla_put_failure:
 684         return -ENOBUFS;
 685 }
 686
 687 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 688                               struct cfg80211_registered_device *dev)
 689 {
 690         void *hdr;
 691         struct nlattr *nl_bands, *nl_band;
 692         struct nlattr *nl_freqs, *nl_freq;
 693         struct nlattr *nl_rates, *nl_rate;
 694         struct nlattr *nl_cmds;
 695         enum ieee80211_band band;
 696         struct ieee80211_channel *chan;
 697         struct ieee80211_rate *rate;
 698         int i;
 699         const struct ieee80211_txrx_stypes *mgmt_stypes =
 700                                 dev->wiphy.mgmt_stypes;
 701
 702         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 703         if (!hdr)
 704                 return -1;
 705
 706         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
 707         NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));
 708
 709         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
 710                     cfg80211_rdev_list_generation);
 711
 712         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 713                    dev->wiphy.retry_short);
 714         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 715                    dev->wiphy.retry_long);
 716         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 717                     dev->wiphy.frag_threshold);
 718         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 719                     dev->wiphy.rts_threshold);
 720         NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 721                     dev->wiphy.coverage_class);
 722         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 723                    dev->wiphy.max_scan_ssids);
 724         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 725                    dev->wiphy.max_sched_scan_ssids);
 726         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 727                     dev->wiphy.max_scan_ie_len);
 728         NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 729                     dev->wiphy.max_sched_scan_ie_len);
 730         NLA_PUT_U8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 731                    dev->wiphy.max_match_sets);
 732
 733         if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
 734                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
 735         if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
 736                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
 737         if (dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD)
 738                 NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_AP_UAPSD);
 739         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
 740                 NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
 741         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)
 742                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_SUPPORT);
 743         if (dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)
 744                 NLA_PUT_FLAG(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP);
 745
 746         NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
 747                 sizeof(u32) * dev->wiphy.n_cipher_suites,
 748                 dev->wiphy.cipher_suites);
 749
 750         NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 751                    dev->wiphy.max_num_pmkids);
 752
 753         if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
 754                 NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);
 755
 756         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 757                     dev->wiphy.available_antennas_tx);
 758         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 759                     dev->wiphy.available_antennas_rx);
 760
 761         if ((dev->wiphy.available_antennas_tx ||
 762              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 763                 u32 tx_ant = 0, rx_ant = 0;
 764                 int res;
 765                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 766                 if (!res) {
 767                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
 768                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
 769                 }
 770         }
 771
 772         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 773                                 dev->wiphy.interface_modes))
 774                 goto nla_put_failure;
 775
 776         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 777         if (!nl_bands)
 778                 goto nla_put_failure;
 779
 780         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 781                 if (!dev->wiphy.bands[band])
 782                         continue;
 783
 784                 nl_band = nla_nest_start(msg, band);
 785                 if (!nl_band)
 786                         goto nla_put_failure;
 787
 788                 /* add HT info */
 789                 if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
 790                         NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 791                                 sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 792                                 &dev->wiphy.bands[band]->ht_cap.mcs);
 793                         NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
 794                                 dev->wiphy.bands[band]->ht_cap.cap);
 795                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 796                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor);
 797                         NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 798                                 dev->wiphy.bands[band]->ht_cap.ampdu_density);
 799                 }
 800
 801                 /* add frequencies */
 802                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 803                 if (!nl_freqs)
 804                         goto nla_put_failure;
 805
 806                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 807                         nl_freq = nla_nest_start(msg, i);
 808                         if (!nl_freq)
 809                                 goto nla_put_failure;
 810
 811                         chan = &dev->wiphy.bands[band]->channels[i];
 812
 813                         if (nl80211_msg_put_channel(msg, chan))
 814                                 goto nla_put_failure;
 815
 816                         nla_nest_end(msg, nl_freq);
 817                 }
 818
 819                 nla_nest_end(msg, nl_freqs);
 820
 821                 /* add bitrates */
 822                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 823                 if (!nl_rates)
 824                         goto nla_put_failure;
 825
 826                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 827                         nl_rate = nla_nest_start(msg, i);
 828                         if (!nl_rate)
 829                                 goto nla_put_failure;
 830
 831                         rate = &dev->wiphy.bands[band]->bitrates[i];
 832                         NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
 833                                     rate->bitrate);
 834                         if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
 835                                 NLA_PUT_FLAG(msg,
 836                                         NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);
 837
 838                         nla_nest_end(msg, nl_rate);
 839                 }
 840
 841                 nla_nest_end(msg, nl_rates);
 842
 843                 nla_nest_end(msg, nl_band);
 844         }
 845         nla_nest_end(msg, nl_bands);
 846
 847         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 848         if (!nl_cmds)
 849                 goto nla_put_failure;
 850
 851         i = 0;
 852 #define CMD(op, n)                                              \
 853          do {                                                   \
 854                 if (dev->ops->op) {                             \
 855                         i++;                                    \
 856                         NLA_PUT_U32(msg, i, NL80211_CMD_ ## n); \
 857                 }                                               \
 858         } while (0)
 859
 860         CMD(add_virtual_intf, NEW_INTERFACE);
 861         CMD(change_virtual_intf, SET_INTERFACE);
 862         CMD(add_key, NEW_KEY);
 863         CMD(add_beacon, NEW_BEACON);
 864         CMD(add_station, NEW_STATION);
 865         CMD(add_mpath, NEW_MPATH);
 866         CMD(update_mesh_config, SET_MESH_CONFIG);
 867         CMD(change_bss, SET_BSS);
 868         CMD(auth, AUTHENTICATE);
 869         CMD(assoc, ASSOCIATE);
 870         CMD(deauth, DEAUTHENTICATE);
 871         CMD(disassoc, DISASSOCIATE);
 872         CMD(join_ibss, JOIN_IBSS);
 873         CMD(join_mesh, JOIN_MESH);
 874         CMD(set_pmksa, SET_PMKSA);
 875         CMD(del_pmksa, DEL_PMKSA);
 876         CMD(flush_pmksa, FLUSH_PMKSA);
 877         CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 878         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
 879         CMD(mgmt_tx, FRAME);
 880         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
 881         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 882                 i++;
 883                 NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
 884         }
 885         CMD(set_channel, SET_CHANNEL);
 886         CMD(set_wds_peer, SET_WDS_PEER);
 887         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
 888                 CMD(tdls_mgmt, TDLS_MGMT);
 889                 CMD(tdls_oper, TDLS_OPER);
 890         }
 891         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
 892                 CMD(sched_scan_start, START_SCHED_SCAN);
 893
 894 #undef CMD
 895
 896         if (dev->ops->connect || dev->ops->auth) {
 897                 i++;
 898                 NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
 899         }
 900
 901         if (dev->ops->disconnect || dev->ops->deauth) {
 902                 i++;
 903                 NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
 904         }
 905
 906         nla_nest_end(msg, nl_cmds);
 907
 908         if (dev->ops->remain_on_channel)
 909                 NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
 910                             dev->wiphy.max_remain_on_channel_duration);
 911
 912         if (dev->ops->mgmt_tx_cancel_wait)
 913                 NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);
 914
 915         if (mgmt_stypes) {
 916                 u16 stypes;
 917                 struct nlattr *nl_ftypes, *nl_ifs;
 918                 enum nl80211_iftype ift;
 919
 920                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
 921                 if (!nl_ifs)
 922                         goto nla_put_failure;
 923
 924                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 925                         nl_ftypes = nla_nest_start(msg, ift);
 926                         if (!nl_ftypes)
 927                                 goto nla_put_failure;
 928                         i = 0;
 929                         stypes = mgmt_stypes[ift].tx;
 930                         while (stypes) {
 931                                 if (stypes & 1)
 932                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 933                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 934                                 stypes >>= 1;
 935                                 i++;
 936                         }
 937                         nla_nest_end(msg, nl_ftypes);
 938                 }
 939
 940                 nla_nest_end(msg, nl_ifs);
 941
 942                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
 943                 if (!nl_ifs)
 944                         goto nla_put_failure;
 945
 946                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
 947                         nl_ftypes = nla_nest_start(msg, ift);
 948                         if (!nl_ftypes)
 949                                 goto nla_put_failure;
 950                         i = 0;
 951                         stypes = mgmt_stypes[ift].rx;
 952                         while (stypes) {
 953                                 if (stypes & 1)
 954                                         NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
 955                                                     (i << 4) | IEEE80211_FTYPE_MGMT);
 956                                 stypes >>= 1;
 957                                 i++;
 958                         }
 959                         nla_nest_end(msg, nl_ftypes);
 960                 }
 961                 nla_nest_end(msg, nl_ifs);
 962         }
 963
 964         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
 965                 struct nlattr *nl_wowlan;
 966
 967                 nl_wowlan = nla_nest_start(msg,
 968                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
 969                 if (!nl_wowlan)
 970                         goto nla_put_failure;
 971
 972                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
 973                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
 974                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
 975                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
 976                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
 977                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
 978                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)
 979                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED);
 980                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE)
 981                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
 982                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ)
 983                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
 984                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE)
 985                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
 986                 if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE)
 987                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
 988                 if (dev->wiphy.wowlan.n_patterns) {
 989                         struct nl80211_wowlan_pattern_support pat = {
 990                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
 991                                 .min_pattern_len =
 992                                         dev->wiphy.wowlan.pattern_min_len,
 993                                 .max_pattern_len =
 994                                         dev->wiphy.wowlan.pattern_max_len,
 995                         };
 996                         NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
 997                                 sizeof(pat), &pat);
 998                 }
 999
1000                 nla_nest_end(msg, nl_wowlan);
1001         }
1002
1003         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1004                                 dev->wiphy.software_iftypes))
1005                 goto nla_put_failure;
1006
1007         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1008                 goto nla_put_failure;
1009
1010         return genlmsg_end(msg, hdr);
1011
1012  nla_put_failure:
1013         genlmsg_cancel(msg, hdr);
1014         return -EMSGSIZE;
1015 }
1016
1017 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1018 {
1019         int idx = 0;
1020         int start = cb->args[0];
1021         struct cfg80211_registered_device *dev;
1022
1023         mutex_lock(&cfg80211_mutex);
1024         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1025                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1026                         continue;
1027                 if (++idx <= start)
1028                         continue;
1029                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1030                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1031                                        dev) < 0) {
1032                         idx--;
1033                         break;
1034                 }
1035         }
1036         mutex_unlock(&cfg80211_mutex);
1037
1038         cb->args[0] = idx;
1039
1040         return skb->len;
1041 }
1042
1043 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1044 {
1045         struct sk_buff *msg;
1046         struct cfg80211_registered_device *dev = info->user_ptr[0];
1047
1048         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1049         if (!msg)
1050                 return -ENOMEM;
1051
1052         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1053                 nlmsg_free(msg);
1054                 return -ENOBUFS;
1055         }
1056
1057         return genlmsg_reply(msg, info);
1058 }
1059
1060 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1061         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1062         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1063         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1064         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1065         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1066 };
1067
1068 static int parse_txq_params(struct nlattr *tb[],
1069                             struct ieee80211_txq_params *txq_params)
1070 {
1071         if (!tb[NL80211_TXQ_ATTR_QUEUE] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1072             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1073             !tb[NL80211_TXQ_ATTR_AIFS])
1074                 return -EINVAL;
1075
1076         txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
1077         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1078         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1079         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1080         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1081
1082         return 0;
1083 }
1084
1085 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1086 {
1087         /*
1088          * You can only set the channel explicitly for AP, mesh
1089          * and WDS type interfaces; all others have their channel
1090          * managed via their respective "establish a connection"
1091          * command (connect, join, ...)
1092          *
1093          * Monitors are special as they are normally slaved to
1094          * whatever else is going on, so they behave as though
1095          * you tried setting the wiphy channel itself.
1096          */
1097         return !wdev ||
1098                 wdev->iftype == NL80211_IFTYPE_AP ||
1099                 wdev->iftype == NL80211_IFTYPE_WDS ||
1100                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1101                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1102                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1103 }
1104
1105 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1106                                  struct wireless_dev *wdev,
1107                                  struct genl_info *info)
1108 {
1109         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1110         u32 freq;
1111         int result;
1112
1113         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1114                 return -EINVAL;
1115
1116         if (!nl80211_can_set_dev_channel(wdev))
1117                 return -EOPNOTSUPP;
1118
1119         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1120                 channel_type = nla_get_u32(info->attrs[
1121                                    NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1122                 if (channel_type != NL80211_CHAN_NO_HT &&
1123                     channel_type != NL80211_CHAN_HT20 &&
1124                     channel_type != NL80211_CHAN_HT40PLUS &&
1125                     channel_type != NL80211_CHAN_HT40MINUS)
1126                         return -EINVAL;
1127         }
1128
1129         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1130
1131         mutex_lock(&rdev->devlist_mtx);
1132         if (wdev) {
1133                 wdev_lock(wdev);
1134                 result = cfg80211_set_freq(rdev, wdev, freq, channel_type);
1135                 wdev_unlock(wdev);
1136         } else {
1137                 result = cfg80211_set_freq(rdev, NULL, freq, channel_type);
1138         }
1139         mutex_unlock(&rdev->devlist_mtx);
1140
1141         return result;
1142 }
1143
1144 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1145 {
1146         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1147         struct net_device *netdev = info->user_ptr[1];
1148
1149         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1150 }
1151
1152 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1153 {
1154         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1155         struct net_device *dev = info->user_ptr[1];
1156         struct wireless_dev *wdev = dev->ieee80211_ptr;
1157         const u8 *bssid;
1158
1159         if (!info->attrs[NL80211_ATTR_MAC])
1160                 return -EINVAL;
1161
1162         if (netif_running(dev))
1163                 return -EBUSY;
1164
1165         if (!rdev->ops->set_wds_peer)
1166                 return -EOPNOTSUPP;
1167
1168         if (wdev->iftype != NL80211_IFTYPE_WDS)
1169                 return -EOPNOTSUPP;
1170
1171         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1172         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1173 }
1174
1175
1176 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1177 {
1178         struct cfg80211_registered_device *rdev;
1179         struct net_device *netdev = NULL;
1180         struct wireless_dev *wdev;
1181         int result = 0, rem_txq_params = 0;
1182         struct nlattr *nl_txq_params;
1183         u32 changed;
1184         u8 retry_short = 0, retry_long = 0;
1185         u32 frag_threshold = 0, rts_threshold = 0;
1186         u8 coverage_class = 0;
1187
1188         /*
1189          * Try to find the wiphy and netdev. Normally this
1190          * function shouldn't need the netdev, but this is
1191          * done for backward compatibility -- previously
1192          * setting the channel was done per wiphy, but now
1193          * it is per netdev. Previous userland like hostapd
1194          * also passed a netdev to set_wiphy, so that it is
1195          * possible to let that go to the right netdev!
1196          */
1197         mutex_lock(&cfg80211_mutex);
1198
1199         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1200                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1201
1202                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1203                 if (netdev && netdev->ieee80211_ptr) {
1204                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1205                         mutex_lock(&rdev->mtx);
1206                 } else
1207                         netdev = NULL;
1208         }
1209
1210         if (!netdev) {
1211                 rdev = __cfg80211_rdev_from_info(info);
1212                 if (IS_ERR(rdev)) {
1213                         mutex_unlock(&cfg80211_mutex);
1214                         return PTR_ERR(rdev);
1215                 }
1216                 wdev = NULL;
1217                 netdev = NULL;
1218                 result = 0;
1219
1220                 mutex_lock(&rdev->mtx);
1221         } else if (netif_running(netdev) &&
1222                    nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1223                 wdev = netdev->ieee80211_ptr;
1224         else
1225                 wdev = NULL;
1226
1227         /*
1228          * end workaround code, by now the rdev is available
1229          * and locked, and wdev may or may not be NULL.
1230          */
1231
1232         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1233                 result = cfg80211_dev_rename(
1234                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1235
1236         mutex_unlock(&cfg80211_mutex);
1237
1238         if (result)
1239                 goto bad_res;
1240
1241         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1242                 struct ieee80211_txq_params txq_params;
1243                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1244
1245                 if (!rdev->ops->set_txq_params) {
1246                         result = -EOPNOTSUPP;
1247                         goto bad_res;
1248                 }
1249
1250                 if (!netdev) {
1251                         result = -EINVAL;
1252                         goto bad_res;
1253                 }
1254
1255                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1256                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1257                         result = -EINVAL;
1258                         goto bad_res;
1259                 }
1260
1261                 if (!netif_running(netdev)) {
1262                         result = -ENETDOWN;
1263                         goto bad_res;
1264                 }
1265
1266                 nla_for_each_nested(nl_txq_params,
1267                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1268                                     rem_txq_params) {
1269                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1270                                   nla_data(nl_txq_params),
1271                                   nla_len(nl_txq_params),
1272                                   txq_params_policy);
1273                         result = parse_txq_params(tb, &txq_params);
1274                         if (result)
1275                                 goto bad_res;
1276
1277                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1278                                                            netdev,
1279                                                            &txq_params);
1280                         if (result)
1281                                 goto bad_res;
1282                 }
1283         }
1284
1285         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1286                 result = __nl80211_set_channel(rdev, wdev, info);
1287                 if (result)
1288                         goto bad_res;
1289         }
1290
1291         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1292                 enum nl80211_tx_power_setting type;
1293                 int idx, mbm = 0;
1294
1295                 if (!rdev->ops->set_tx_power) {
1296                         result = -EOPNOTSUPP;
1297                         goto bad_res;
1298                 }
1299
1300                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1301                 type = nla_get_u32(info->attrs[idx]);
1302
1303                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1304                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1305                         result = -EINVAL;
1306                         goto bad_res;
1307                 }
1308
1309                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1310                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1311                         mbm = nla_get_u32(info->attrs[idx]);
1312                 }
1313
1314                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1315                 if (result)
1316                         goto bad_res;
1317         }
1318
1319         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1320             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1321                 u32 tx_ant, rx_ant;
1322                 if ((!rdev->wiphy.available_antennas_tx &&
1323                      !rdev->wiphy.available_antennas_rx) ||
1324                     !rdev->ops->set_antenna) {
1325                         result = -EOPNOTSUPP;
1326                         goto bad_res;
1327                 }
1328
1329                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1330                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1331
1332                 /* reject antenna configurations which don't match the
1333                  * available antenna masks, except for the "all" mask */
1334                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1335                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1336                         result = -EINVAL;
1337                         goto bad_res;
1338                 }
1339
1340                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1341                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1342
1343                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1344                 if (result)
1345                         goto bad_res;
1346         }
1347
1348         changed = 0;
1349
1350         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1351                 retry_short = nla_get_u8(
1352                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1353                 if (retry_short == 0) {
1354                         result = -EINVAL;
1355                         goto bad_res;
1356                 }
1357                 changed |= WIPHY_PARAM_RETRY_SHORT;
1358         }
1359
1360         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1361                 retry_long = nla_get_u8(
1362                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1363                 if (retry_long == 0) {
1364                         result = -EINVAL;
1365                         goto bad_res;
1366                 }
1367                 changed |= WIPHY_PARAM_RETRY_LONG;
1368         }
1369
1370         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1371                 frag_threshold = nla_get_u32(
1372                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1373                 if (frag_threshold < 256) {
1374                         result = -EINVAL;
1375                         goto bad_res;
1376                 }
1377                 if (frag_threshold != (u32) -1) {
1378                         /*
1379                          * Fragments (apart from the last one) are required to
1380                          * have even length. Make the fragmentation code
1381                          * simpler by stripping LSB should someone try to use
1382                          * odd threshold value.
1383                          */
1384                         frag_threshold &= ~0x1;
1385                 }
1386                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1387         }
1388
1389         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1390                 rts_threshold = nla_get_u32(
1391                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1392                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1393         }
1394
1395         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1396                 coverage_class = nla_get_u8(
1397                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1398                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1399         }
1400
1401         if (changed) {
1402                 u8 old_retry_short, old_retry_long;
1403                 u32 old_frag_threshold, old_rts_threshold;
1404                 u8 old_coverage_class;
1405
1406                 if (!rdev->ops->set_wiphy_params) {
1407                         result = -EOPNOTSUPP;
1408                         goto bad_res;
1409                 }
1410
1411                 old_retry_short = rdev->wiphy.retry_short;
1412                 old_retry_long = rdev->wiphy.retry_long;
1413                 old_frag_threshold = rdev->wiphy.frag_threshold;
1414                 old_rts_threshold = rdev->wiphy.rts_threshold;
1415                 old_coverage_class = rdev->wiphy.coverage_class;
1416
1417                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1418                         rdev->wiphy.retry_short = retry_short;
1419                 if (changed & WIPHY_PARAM_RETRY_LONG)
1420                         rdev->wiphy.retry_long = retry_long;
1421                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1422                         rdev->wiphy.frag_threshold = frag_threshold;
1423                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1424                         rdev->wiphy.rts_threshold = rts_threshold;
1425                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1426                         rdev->wiphy.coverage_class = coverage_class;
1427
1428                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1429                 if (result) {
1430                         rdev->wiphy.retry_short = old_retry_short;
1431                         rdev->wiphy.retry_long = old_retry_long;
1432                         rdev->wiphy.frag_threshold = old_frag_threshold;
1433                         rdev->wiphy.rts_threshold = old_rts_threshold;
1434                         rdev->wiphy.coverage_class = old_coverage_class;
1435                 }
1436         }
1437
1438  bad_res:
1439         mutex_unlock(&rdev->mtx);
1440         if (netdev)
1441                 dev_put(netdev);
1442         return result;
1443 }
1444
1445
1446 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1447                               struct cfg80211_registered_device *rdev,
1448                               struct net_device *dev)
1449 {
1450         void *hdr;
1451
1452         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1453         if (!hdr)
1454                 return -1;
1455
1456         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1457         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
1458         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, dev->name);
1459         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, dev->ieee80211_ptr->iftype);
1460
1461         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
1462                     rdev->devlist_generation ^
1463                         (cfg80211_rdev_list_generation << 2));
1464
1465         return genlmsg_end(msg, hdr);
1466
1467  nla_put_failure:
1468         genlmsg_cancel(msg, hdr);
1469         return -EMSGSIZE;
1470 }
1471
1472 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1473 {
1474         int wp_idx = 0;
1475         int if_idx = 0;
1476         int wp_start = cb->args[0];
1477         int if_start = cb->args[1];
1478         struct cfg80211_registered_device *rdev;
1479         struct wireless_dev *wdev;
1480
1481         mutex_lock(&cfg80211_mutex);
1482         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1483                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1484                         continue;
1485                 if (wp_idx < wp_start) {
1486                         wp_idx++;
1487                         continue;
1488                 }
1489                 if_idx = 0;
1490
1491                 mutex_lock(&rdev->devlist_mtx);
1492                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1493                         if (if_idx < if_start) {
1494                                 if_idx++;
1495                                 continue;
1496                         }
1497                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1498                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1499                                                rdev, wdev->netdev) < 0) {
1500                                 mutex_unlock(&rdev->devlist_mtx);
1501                                 goto out;
1502                         }
1503                         if_idx++;
1504                 }
1505                 mutex_unlock(&rdev->devlist_mtx);
1506
1507                 wp_idx++;
1508         }
1509  out:
1510         mutex_unlock(&cfg80211_mutex);
1511
1512         cb->args[0] = wp_idx;
1513         cb->args[1] = if_idx;
1514
1515         return skb->len;
1516 }
1517
1518 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1519 {
1520         struct sk_buff *msg;
1521         struct cfg80211_registered_device *dev = info->user_ptr[0];
1522         struct net_device *netdev = info->user_ptr[1];
1523
1524         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1525         if (!msg)
1526                 return -ENOMEM;
1527
1528         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1529                                dev, netdev) < 0) {
1530                 nlmsg_free(msg);
1531                 return -ENOBUFS;
1532         }
1533
1534         return genlmsg_reply(msg, info);
1535 }
1536
1537 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1538         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1539         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1540         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1541         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1542         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1543 };
1544
1545 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1546 {
1547         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1548         int flag;
1549
1550         *mntrflags = 0;
1551
1552         if (!nla)
1553                 return -EINVAL;
1554
1555         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1556                              nla, mntr_flags_policy))
1557                 return -EINVAL;
1558
1559         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1560                 if (flags[flag])
1561                         *mntrflags |= (1<<flag);
1562
1563         return 0;
1564 }
1565
1566 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1567                                struct net_device *netdev, u8 use_4addr,
1568                                enum nl80211_iftype iftype)
1569 {
1570         if (!use_4addr) {
1571                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1572                         return -EBUSY;
1573                 return 0;
1574         }
1575
1576         switch (iftype) {
1577         case NL80211_IFTYPE_AP_VLAN:
1578                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1579                         return 0;
1580                 break;
1581         case NL80211_IFTYPE_STATION:
1582                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1583                         return 0;
1584                 break;
1585         default:
1586                 break;
1587         }
1588
1589         return -EOPNOTSUPP;
1590 }
1591
1592 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1593 {
1594         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1595         struct vif_params params;
1596         int err;
1597         enum nl80211_iftype otype, ntype;
1598         struct net_device *dev = info->user_ptr[1];
1599         u32 _flags, *flags = NULL;
1600         bool change = false;
1601
1602         memset(&params, 0, sizeof(params));
1603
1604         otype = ntype = dev->ieee80211_ptr->iftype;
1605
1606         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1607                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1608                 if (otype != ntype)
1609                         change = true;
1610                 if (ntype > NL80211_IFTYPE_MAX)
1611                         return -EINVAL;
1612         }
1613
1614         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1615                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1616
1617                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1618                         return -EINVAL;
1619                 if (netif_running(dev))
1620                         return -EBUSY;
1621
1622                 wdev_lock(wdev);
1623                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1624                              IEEE80211_MAX_MESH_ID_LEN);
1625                 wdev->mesh_id_up_len =
1626                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1627                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1628                        wdev->mesh_id_up_len);
1629                 wdev_unlock(wdev);
1630         }
1631
1632         if (info->attrs[NL80211_ATTR_4ADDR]) {
1633                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1634                 change = true;
1635                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1636                 if (err)
1637                         return err;
1638         } else {
1639                 params.use_4addr = -1;
1640         }
1641
1642         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1643                 if (ntype != NL80211_IFTYPE_MONITOR)
1644                         return -EINVAL;
1645                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1646                                           &_flags);
1647                 if (err)
1648                         return err;
1649
1650                 flags = &_flags;
1651                 change = true;
1652         }
1653
1654         if (change)
1655                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1656         else
1657                 err = 0;
1658
1659         if (!err && params.use_4addr != -1)
1660                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1661
1662         return err;
1663 }
1664
1665 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1666 {
1667         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1668         struct vif_params params;
1669         struct net_device *dev;
1670         int err;
1671         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1672         u32 flags;
1673
1674         memset(&params, 0, sizeof(params));
1675
1676         if (!info->attrs[NL80211_ATTR_IFNAME])
1677                 return -EINVAL;
1678
1679         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1680                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1681                 if (type > NL80211_IFTYPE_MAX)
1682                         return -EINVAL;
1683         }
1684
1685         if (!rdev->ops->add_virtual_intf ||
1686             !(rdev->wiphy.interface_modes & (1 << type)))
1687                 return -EOPNOTSUPP;
1688
1689         if (info->attrs[NL80211_ATTR_4ADDR]) {
1690                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1691                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1692                 if (err)
1693                         return err;
1694         }
1695
1696         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1697                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1698                                   &flags);
1699         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1700                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1701                 type, err ? NULL : &flags, &params);
1702         if (IS_ERR(dev))
1703                 return PTR_ERR(dev);
1704
1705         if (type == NL80211_IFTYPE_MESH_POINT &&
1706             info->attrs[NL80211_ATTR_MESH_ID]) {
1707                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1708
1709                 wdev_lock(wdev);
1710                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1711                              IEEE80211_MAX_MESH_ID_LEN);
1712                 wdev->mesh_id_up_len =
1713                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1714                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1715                        wdev->mesh_id_up_len);
1716                 wdev_unlock(wdev);
1717         }
1718
1719         return 0;
1720 }
1721
1722 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1723 {
1724         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1725         struct net_device *dev = info->user_ptr[1];
1726
1727         if (!rdev->ops->del_virtual_intf)
1728                 return -EOPNOTSUPP;
1729
1730         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1731 }
1732
1733 struct get_key_cookie {
1734         struct sk_buff *msg;
1735         int error;
1736         int idx;
1737 };
1738
1739 static void get_key_callback(void *c, struct key_params *params)
1740 {
1741         struct nlattr *key;
1742         struct get_key_cookie *cookie = c;
1743
1744         if (params->key)
1745                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_DATA,
1746                         params->key_len, params->key);
1747
1748         if (params->seq)
1749                 NLA_PUT(cookie->msg, NL80211_ATTR_KEY_SEQ,
1750                         params->seq_len, params->seq);
1751
1752         if (params->cipher)
1753                 NLA_PUT_U32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
1754                             params->cipher);
1755
1756         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
1757         if (!key)
1758                 goto nla_put_failure;
1759
1760         if (params->key)
1761                 NLA_PUT(cookie->msg, NL80211_KEY_DATA,
1762                         params->key_len, params->key);
1763
1764         if (params->seq)
1765                 NLA_PUT(cookie->msg, NL80211_KEY_SEQ,
1766                         params->seq_len, params->seq);
1767
1768         if (params->cipher)
1769                 NLA_PUT_U32(cookie->msg, NL80211_KEY_CIPHER,
1770                             params->cipher);
1771
1772         NLA_PUT_U8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx);
1773
1774         nla_nest_end(cookie->msg, key);
1775
1776         return;
1777  nla_put_failure:
1778         cookie->error = 1;
1779 }
1780
1781 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
1782 {
1783         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1784         int err;
1785         struct net_device *dev = info->user_ptr[1];
1786         u8 key_idx = 0;
1787         const u8 *mac_addr = NULL;
1788         bool pairwise;
1789         struct get_key_cookie cookie = {
1790                 .error = 0,
1791         };
1792         void *hdr;
1793         struct sk_buff *msg;
1794
1795         if (info->attrs[NL80211_ATTR_KEY_IDX])
1796                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
1797
1798         if (key_idx > 5)
1799                 return -EINVAL;
1800
1801         if (info->attrs[NL80211_ATTR_MAC])
1802                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1803
1804         pairwise = !!mac_addr;
1805         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
1806                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
1807                 if (kt >= NUM_NL80211_KEYTYPES)
1808                         return -EINVAL;
1809                 if (kt != NL80211_KEYTYPE_GROUP &&
1810                     kt != NL80211_KEYTYPE_PAIRWISE)
1811                         return -EINVAL;
1812                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
1813         }
1814
1815         if (!rdev->ops->get_key)
1816                 return -EOPNOTSUPP;
1817
1818         if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
1819                 return -ENOENT;
1820
1821         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1822         if (!msg)
1823                 return -ENOMEM;
1824
1825         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
1826                              NL80211_CMD_NEW_KEY);
1827         if (IS_ERR(hdr))
1828                 return PTR_ERR(hdr);
1829
1830         cookie.msg = msg;
1831         cookie.idx = key_idx;
1832
1833         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
1834         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1835         if (mac_addr)
1836                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
1837
1838         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
1839                                  mac_addr, &cookie, get_key_callback);
1840
1841         if (err)
1842                 goto free_msg;
1843
1844         if (cookie.error)
1845                 goto nla_put_failure;
1846
1847         genlmsg_end(msg, hdr);
1848         return genlmsg_reply(msg, info);
1849
1850  nla_put_failure:
1851         err = -ENOBUFS;
1852  free_msg:
1853         nlmsg_free(msg);
1854         return err;
1855 }
1856
1857 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
1858 {
1859         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1860         struct key_parse key;
1861         int err;
1862         struct net_device *dev = info->user_ptr[1];
1863
1864         err = nl80211_parse_key(info, &key);
1865         if (err)
1866                 return err;
1867
1868         if (key.idx < 0)
1869                 return -EINVAL;
1870
1871         /* only support setting default key */
1872         if (!key.def && !key.defmgmt)
1873                 return -EINVAL;
1874
1875         wdev_lock(dev->ieee80211_ptr);
1876
1877         if (key.def) {
1878                 if (!rdev->ops->set_default_key) {
1879                         err = -EOPNOTSUPP;
1880                         goto out;
1881                 }
1882
1883                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1884                 if (err)
1885                         goto out;
1886
1887                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
1888                                                  key.def_uni, key.def_multi);
1889
1890                 if (err)
1891                         goto out;
1892
1893 #ifdef CONFIG_CFG80211_WEXT
1894                 dev->ieee80211_ptr->wext.default_key = key.idx;
1895 #endif
1896         } else {
1897                 if (key.def_uni || !key.def_multi) {
1898                         err = -EINVAL;
1899                         goto out;
1900                 }
1901
1902                 if (!rdev->ops->set_default_mgmt_key) {
1903                         err = -EOPNOTSUPP;
1904                         goto out;
1905                 }
1906
1907                 err = nl80211_key_allowed(dev->ieee80211_ptr);
1908                 if (err)
1909                         goto out;
1910
1911                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
1912                                                       dev, key.idx);
1913                 if (err)
1914                         goto out;
1915
1916 #ifdef CONFIG_CFG80211_WEXT
1917                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
1918 #endif
1919         }
1920
1921  out:
1922         wdev_unlock(dev->ieee80211_ptr);
1923
1924         return err;
1925 }
1926
1927 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
1928 {
1929         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1930         int err;
1931         struct net_device *dev = info->user_ptr[1];
1932         struct key_parse key;
1933         const u8 *mac_addr = NULL;
1934
1935         err = nl80211_parse_key(info, &key);
1936         if (err)
1937                 return err;
1938
1939         if (!key.p.key)
1940                 return -EINVAL;
1941
1942         if (info->attrs[NL80211_ATTR_MAC])
1943                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1944
1945         if (key.type == -1) {
1946                 if (mac_addr)
1947                         key.type = NL80211_KEYTYPE_PAIRWISE;
1948                 else
1949                         key.type = NL80211_KEYTYPE_GROUP;
1950         }
1951
1952         /* for now */
1953         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
1954             key.type != NL80211_KEYTYPE_GROUP)
1955                 return -EINVAL;
1956
1957         if (!rdev->ops->add_key)
1958                 return -EOPNOTSUPP;
1959
1960         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
1961                                            key.type == NL80211_KEYTYPE_PAIRWISE,
1962                                            mac_addr))
1963                 return -EINVAL;
1964
1965         wdev_lock(dev->ieee80211_ptr);
1966         err = nl80211_key_allowed(dev->ieee80211_ptr);
1967         if (!err)
1968                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
1969                                          key.type == NL80211_KEYTYPE_PAIRWISE,
1970                                          mac_addr, &key.p);
1971         wdev_unlock(dev->ieee80211_ptr);
1972
1973         return err;
1974 }
1975
1976 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
1977 {
1978         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1979         int err;
1980         struct net_device *dev = info->user_ptr[1];
1981         u8 *mac_addr = NULL;
1982         struct key_parse key;
1983
1984         err = nl80211_parse_key(info, &key);
1985         if (err)
1986                 return err;
1987
1988         if (info->attrs[NL80211_ATTR_MAC])
1989                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
1990
1991         if (key.type == -1) {
1992                 if (mac_addr)
1993                         key.type = NL80211_KEYTYPE_PAIRWISE;
1994                 else
1995                         key.type = NL80211_KEYTYPE_GROUP;
1996         }
1997
1998         /* for now */
1999         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2000             key.type != NL80211_KEYTYPE_GROUP)
2001                 return -EINVAL;
2002
2003         if (!rdev->ops->del_key)
2004                 return -EOPNOTSUPP;
2005
2006         wdev_lock(dev->ieee80211_ptr);
2007         err = nl80211_key_allowed(dev->ieee80211_ptr);
2008
2009         if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
2010             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2011                 err = -ENOENT;
2012
2013         if (!err)
2014                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2015                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2016                                          mac_addr);
2017
2018 #ifdef CONFIG_CFG80211_WEXT
2019         if (!err) {
2020                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2021                         dev->ieee80211_ptr->wext.default_key = -1;
2022                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2023                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2024         }
2025 #endif
2026         wdev_unlock(dev->ieee80211_ptr);
2027
2028         return err;
2029 }
2030
2031 static int nl80211_addset_beacon(struct sk_buff *skb, struct genl_info *info)
2032 {
2033         int (*call)(struct wiphy *wiphy, struct net_device *dev,
2034                     struct beacon_parameters *info);
2035         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2036         struct net_device *dev = info->user_ptr[1];
2037         struct wireless_dev *wdev = dev->ieee80211_ptr;
2038         struct beacon_parameters params;
2039         int haveinfo = 0, err;
2040
2041         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2042             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2043             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2044             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2045                 return -EINVAL;
2046
2047         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2048             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2049                 return -EOPNOTSUPP;
2050
2051         memset(&params, 0, sizeof(params));
2052
2053         switch (info->genlhdr->cmd) {
2054         case NL80211_CMD_NEW_BEACON:
2055                 /* these are required for NEW_BEACON */
2056                 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2057                     !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2058                     !info->attrs[NL80211_ATTR_BEACON_HEAD])
2059                         return -EINVAL;
2060
2061                 params.interval =
2062                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2063                 params.dtim_period =
2064                         nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2065
2066                 err = cfg80211_validate_beacon_int(rdev, params.interval);
2067                 if (err)
2068                         return err;
2069
2070                 /*
2071                  * In theory, some of these attributes could be required for
2072                  * NEW_BEACON, but since they were not used when the command was
2073                  * originally added, keep them optional for old user space
2074                  * programs to work with drivers that do not need the additional
2075                  * information.
2076                  */
2077                 if (info->attrs[NL80211_ATTR_SSID]) {
2078                         params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2079                         params.ssid_len =
2080                                 nla_len(info->attrs[NL80211_ATTR_SSID]);
2081                         if (params.ssid_len == 0 ||
2082                             params.ssid_len > IEEE80211_MAX_SSID_LEN)
2083                                 return -EINVAL;
2084                 }
2085
2086                 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2087                         params.hidden_ssid = nla_get_u32(
2088                                 info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2089                         if (params.hidden_ssid !=
2090                             NL80211_HIDDEN_SSID_NOT_IN_USE &&
2091                             params.hidden_ssid !=
2092                             NL80211_HIDDEN_SSID_ZERO_LEN &&
2093                             params.hidden_ssid !=
2094                             NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2095                                 return -EINVAL;
2096                 }
2097
2098                 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2099
2100                 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2101                         params.auth_type = nla_get_u32(
2102                                 info->attrs[NL80211_ATTR_AUTH_TYPE]);
2103                         if (!nl80211_valid_auth_type(params.auth_type))
2104                                 return -EINVAL;
2105                 } else
2106                         params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2107
2108                 err = nl80211_crypto_settings(rdev, info, &params.crypto,
2109                                               NL80211_MAX_NR_CIPHER_SUITES);
2110                 if (err)
2111                         return err;
2112
2113                 call = rdev->ops->add_beacon;
2114                 break;
2115         case NL80211_CMD_SET_BEACON:
2116                 call = rdev->ops->set_beacon;
2117                 break;
2118         default:
2119                 WARN_ON(1);
2120                 return -EOPNOTSUPP;
2121         }
2122
2123         if (!call)
2124                 return -EOPNOTSUPP;
2125
2126         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2127                 params.head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2128                 params.head_len =
2129                     nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2130                 haveinfo = 1;
2131         }
2132
2133         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2134                 params.tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2135                 params.tail_len =
2136                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2137                 haveinfo = 1;
2138         }
2139
2140         if (!haveinfo)
2141                 return -EINVAL;
2142
2143         if (info->attrs[NL80211_ATTR_IE]) {
2144                 params.beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2145                 params.beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2146         }
2147
2148         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2149                 params.proberesp_ies =
2150                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2151                 params.proberesp_ies_len =
2152                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2153         }
2154
2155         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2156                 params.assocresp_ies =
2157                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2158                 params.assocresp_ies_len =
2159                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2160         }
2161
2162         err = call(&rdev->wiphy, dev, &params);
2163         if (!err && params.interval)
2164                 wdev->beacon_interval = params.interval;
2165         return err;
2166 }
2167
2168 static int nl80211_del_beacon(struct sk_buff *skb, struct genl_info *info)
2169 {
2170         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2171         struct net_device *dev = info->user_ptr[1];
2172         struct wireless_dev *wdev = dev->ieee80211_ptr;
2173         int err;
2174
2175         if (!rdev->ops->del_beacon)
2176                 return -EOPNOTSUPP;
2177
2178         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2179             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2180                 return -EOPNOTSUPP;
2181
2182         err = rdev->ops->del_beacon(&rdev->wiphy, dev);
2183         if (!err)
2184                 wdev->beacon_interval = 0;
2185         return err;
2186 }
2187
2188 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2189         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2190         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2191         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2192         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2193         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2194 };
2195
2196 static int parse_station_flags(struct genl_info *info,
2197                                struct station_parameters *params)
2198 {
2199         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2200         struct nlattr *nla;
2201         int flag;
2202
2203         /*
2204          * Try parsing the new attribute first so userspace
2205          * can specify both for older kernels.
2206          */
2207         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2208         if (nla) {
2209                 struct nl80211_sta_flag_update *sta_flags;
2210
2211                 sta_flags = nla_data(nla);
2212                 params->sta_flags_mask = sta_flags->mask;
2213                 params->sta_flags_set = sta_flags->set;
2214                 if ((params->sta_flags_mask |
2215                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2216                         return -EINVAL;
2217                 return 0;
2218         }
2219
2220         /* if present, parse the old attribute */
2221
2222         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2223         if (!nla)
2224                 return 0;
2225
2226         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2227                              nla, sta_flags_policy))
2228                 return -EINVAL;
2229
2230         params->sta_flags_mask = (1 << __NL80211_STA_FLAG_AFTER_LAST) - 1;
2231         params->sta_flags_mask &= ~1;
2232
2233         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
2234                 if (flags[flag])
2235                         params->sta_flags_set |= (1<<flag);
2236
2237         return 0;
2238 }
2239
2240 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2241                                  int attr)
2242 {
2243         struct nlattr *rate;
2244         u16 bitrate;
2245
2246         rate = nla_nest_start(msg, attr);
2247         if (!rate)
2248                 goto nla_put_failure;
2249
2250         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2251         bitrate = cfg80211_calculate_bitrate(info);
2252         if (bitrate > 0)
2253                 NLA_PUT_U16(msg, NL80211_RATE_INFO_BITRATE, bitrate);
2254
2255         if (info->flags & RATE_INFO_FLAGS_MCS)
2256                 NLA_PUT_U8(msg, NL80211_RATE_INFO_MCS, info->mcs);
2257         if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH)
2258                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_40_MHZ_WIDTH);
2259         if (info->flags & RATE_INFO_FLAGS_SHORT_GI)
2260                 NLA_PUT_FLAG(msg, NL80211_RATE_INFO_SHORT_GI);
2261
2262         nla_nest_end(msg, rate);
2263         return true;
2264
2265 nla_put_failure:
2266         return false;
2267 }
2268
2269 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2270                                 int flags, struct net_device *dev,
2271                                 const u8 *mac_addr, struct station_info *sinfo)
2272 {
2273         void *hdr;
2274         struct nlattr *sinfoattr, *bss_param;
2275
2276         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2277         if (!hdr)
2278                 return -1;
2279
2280         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2281         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
2282
2283         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, sinfo->generation);
2284
2285         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2286         if (!sinfoattr)
2287                 goto nla_put_failure;
2288         if (sinfo->filled & STATION_INFO_CONNECTED_TIME)
2289                 NLA_PUT_U32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2290                             sinfo->connected_time);
2291         if (sinfo->filled & STATION_INFO_INACTIVE_TIME)
2292                 NLA_PUT_U32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2293                             sinfo->inactive_time);
2294         if (sinfo->filled & STATION_INFO_RX_BYTES)
2295                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_BYTES,
2296                             sinfo->rx_bytes);
2297         if (sinfo->filled & STATION_INFO_TX_BYTES)
2298                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_BYTES,
2299                             sinfo->tx_bytes);
2300         if (sinfo->filled & STATION_INFO_LLID)
2301                 NLA_PUT_U16(msg, NL80211_STA_INFO_LLID,
2302                             sinfo->llid);
2303         if (sinfo->filled & STATION_INFO_PLID)
2304                 NLA_PUT_U16(msg, NL80211_STA_INFO_PLID,
2305                             sinfo->plid);
2306         if (sinfo->filled & STATION_INFO_PLINK_STATE)
2307                 NLA_PUT_U8(msg, NL80211_STA_INFO_PLINK_STATE,
2308                             sinfo->plink_state);
2309         if (sinfo->filled & STATION_INFO_SIGNAL)
2310                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL,
2311                            sinfo->signal);
2312         if (sinfo->filled & STATION_INFO_SIGNAL_AVG)
2313                 NLA_PUT_U8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2314                            sinfo->signal_avg);
2315         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2316                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2317                                           NL80211_STA_INFO_TX_BITRATE))
2318                         goto nla_put_failure;
2319         }
2320         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2321                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2322                                           NL80211_STA_INFO_RX_BITRATE))
2323                         goto nla_put_failure;
2324         }
2325         if (sinfo->filled & STATION_INFO_RX_PACKETS)
2326                 NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
2327                             sinfo->rx_packets);
2328         if (sinfo->filled & STATION_INFO_TX_PACKETS)
2329                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_PACKETS,
2330                             sinfo->tx_packets);
2331         if (sinfo->filled & STATION_INFO_TX_RETRIES)
2332                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_RETRIES,
2333                             sinfo->tx_retries);
2334         if (sinfo->filled & STATION_INFO_TX_FAILED)
2335                 NLA_PUT_U32(msg, NL80211_STA_INFO_TX_FAILED,
2336                             sinfo->tx_failed);
2337         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2338                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2339                 if (!bss_param)
2340                         goto nla_put_failure;
2341
2342                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT)
2343                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_CTS_PROT);
2344                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE)
2345                         NLA_PUT_FLAG(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE);
2346                 if (sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME)
2347                         NLA_PUT_FLAG(msg,
2348                                      NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME);
2349                 NLA_PUT_U8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2350                            sinfo->bss_param.dtim_period);
2351                 NLA_PUT_U16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2352                             sinfo->bss_param.beacon_interval);
2353
2354                 nla_nest_end(msg, bss_param);
2355         }
2356         if (sinfo->filled & STATION_INFO_STA_FLAGS)
2357                 NLA_PUT(msg, NL80211_STA_INFO_STA_FLAGS,
2358                         sizeof(struct nl80211_sta_flag_update),
2359                         &sinfo->sta_flags);
2360         nla_nest_end(msg, sinfoattr);
2361
2362         if (sinfo->filled & STATION_INFO_ASSOC_REQ_IES)
2363                 NLA_PUT(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2364                         sinfo->assoc_req_ies);
2365
2366         return genlmsg_end(msg, hdr);
2367
2368  nla_put_failure:
2369         genlmsg_cancel(msg, hdr);
2370         return -EMSGSIZE;
2371 }
2372
2373 static int nl80211_dump_station(struct sk_buff *skb,
2374                                 struct netlink_callback *cb)
2375 {
2376         struct station_info sinfo;
2377         struct cfg80211_registered_device *dev;
2378         struct net_device *netdev;
2379         u8 mac_addr[ETH_ALEN];
2380         int sta_idx = cb->args[1];
2381         int err;
2382
2383         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2384         if (err)
2385                 return err;
2386
2387         if (!dev->ops->dump_station) {
2388                 err = -EOPNOTSUPP;
2389                 goto out_err;
2390         }
2391
2392         while (1) {
2393                 memset(&sinfo, 0, sizeof(sinfo));
2394                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2395                                              mac_addr, &sinfo);
2396                 if (err == -ENOENT)
2397                         break;
2398                 if (err)
2399                         goto out_err;
2400
2401                 if (nl80211_send_station(skb,
2402                                 NETLINK_CB(cb->skb).pid,
2403                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2404                                 netdev, mac_addr,
2405                                 &sinfo) < 0)
2406                         goto out;
2407
2408                 sta_idx++;
2409         }
2410
2411
2412  out:
2413         cb->args[1] = sta_idx;
2414         err = skb->len;
2415  out_err:
2416         nl80211_finish_netdev_dump(dev);
2417
2418         return err;
2419 }
2420
2421 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2422 {
2423         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2424         struct net_device *dev = info->user_ptr[1];
2425         struct station_info sinfo;
2426         struct sk_buff *msg;
2427         u8 *mac_addr = NULL;
2428         int err;
2429
2430         memset(&sinfo, 0, sizeof(sinfo));
2431
2432         if (!info->attrs[NL80211_ATTR_MAC])
2433                 return -EINVAL;
2434
2435         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2436
2437         if (!rdev->ops->get_station)
2438                 return -EOPNOTSUPP;
2439
2440         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2441         if (err)
2442                 return err;
2443
2444         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2445         if (!msg)
2446                 return -ENOMEM;
2447
2448         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2449                                  dev, mac_addr, &sinfo) < 0) {
2450                 nlmsg_free(msg);
2451                 return -ENOBUFS;
2452         }
2453
2454         return genlmsg_reply(msg, info);
2455 }
2456
2457 /*
2458  * Get vlan interface making sure it is running and on the right wiphy.
2459  */
2460 static int get_vlan(struct genl_info *info,
2461                     struct cfg80211_registered_device *rdev,
2462                     struct net_device **vlan)
2463 {
2464         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2465         *vlan = NULL;
2466
2467         if (vlanattr) {
2468                 *vlan = dev_get_by_index(genl_info_net(info),
2469                                          nla_get_u32(vlanattr));
2470                 if (!*vlan)
2471                         return -ENODEV;
2472                 if (!(*vlan)->ieee80211_ptr)
2473                         return -EINVAL;
2474                 if ((*vlan)->ieee80211_ptr->wiphy != &rdev->wiphy)
2475                         return -EINVAL;
2476                 if (!netif_running(*vlan))
2477                         return -ENETDOWN;
2478         }
2479         return 0;
2480 }
2481
2482 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2483 {
2484         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2485         int err;
2486         struct net_device *dev = info->user_ptr[1];
2487         struct station_parameters params;
2488         u8 *mac_addr = NULL;
2489
2490         memset(&params, 0, sizeof(params));
2491
2492         params.listen_interval = -1;
2493         params.plink_state = -1;
2494
2495         if (info->attrs[NL80211_ATTR_STA_AID])
2496                 return -EINVAL;
2497
2498         if (!info->attrs[NL80211_ATTR_MAC])
2499                 return -EINVAL;
2500
2501         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2502
2503         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2504                 params.supported_rates =
2505                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2506                 params.supported_rates_len =
2507                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2508         }
2509
2510         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2511                 params.listen_interval =
2512                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2513
2514         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2515                 params.ht_capa =
2516                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2517
2518         if (parse_station_flags(info, &params))
2519                 return -EINVAL;
2520
2521         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2522                 params.plink_action =
2523                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2524
2525         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2526                 params.plink_state =
2527                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2528
2529         err = get_vlan(info, rdev, &params.vlan);
2530         if (err)
2531                 goto out;
2532
2533         /* validate settings */
2534         err = 0;
2535
2536         switch (dev->ieee80211_ptr->iftype) {
2537         case NL80211_IFTYPE_AP:
2538         case NL80211_IFTYPE_AP_VLAN:
2539         case NL80211_IFTYPE_P2P_GO:
2540                 /* disallow mesh-specific things */
2541                 if (params.plink_action)
2542                         err = -EINVAL;
2543                 break;
2544         case NL80211_IFTYPE_P2P_CLIENT:
2545         case NL80211_IFTYPE_STATION:
2546                 /* disallow things sta doesn't support */
2547                 if (params.plink_action)
2548                         err = -EINVAL;
2549                 if (params.vlan)
2550                         err = -EINVAL;
2551                 if (params.supported_rates &&
2552                     !(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2553                         err = -EINVAL;
2554                 if (params.ht_capa)
2555                         err = -EINVAL;
2556                 if (params.listen_interval >= 0)
2557                         err = -EINVAL;
2558                 if (params.sta_flags_mask &
2559                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2560                                   BIT(NL80211_STA_FLAG_TDLS_PEER)))
2561                         err = -EINVAL;
2562                 /* can't change the TDLS bit */
2563                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
2564                     (params.sta_flags_mask & BIT(NL80211_STA_FLAG_TDLS_PEER)))
2565                         err = -EINVAL;
2566                 break;
2567         case NL80211_IFTYPE_MESH_POINT:
2568                 /* disallow things mesh doesn't support */
2569                 if (params.vlan)
2570                         err = -EINVAL;
2571                 if (params.ht_capa)
2572                         err = -EINVAL;
2573                 if (params.listen_interval >= 0)
2574                         err = -EINVAL;
2575                 if (params.sta_flags_mask &
2576                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2577                                   BIT(NL80211_STA_FLAG_MFP) |
2578                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
2579                         err = -EINVAL;
2580                 break;
2581         default:
2582                 err = -EINVAL;
2583         }
2584
2585         if (err)
2586                 goto out;
2587
2588         if (!rdev->ops->change_station) {
2589                 err = -EOPNOTSUPP;
2590                 goto out;
2591         }
2592
2593         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
2594
2595  out:
2596         if (params.vlan)
2597                 dev_put(params.vlan);
2598
2599         return err;
2600 }
2601
2602 static struct nla_policy
2603 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
2604         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
2605         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
2606 };
2607
2608 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
2609 {
2610         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2611         int err;
2612         struct net_device *dev = info->user_ptr[1];
2613         struct station_parameters params;
2614         u8 *mac_addr = NULL;
2615
2616         memset(&params, 0, sizeof(params));
2617
2618         if (!info->attrs[NL80211_ATTR_MAC])
2619                 return -EINVAL;
2620
2621         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2622                 return -EINVAL;
2623
2624         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
2625                 return -EINVAL;
2626
2627         if (!info->attrs[NL80211_ATTR_STA_AID])
2628                 return -EINVAL;
2629
2630         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2631         params.supported_rates =
2632                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2633         params.supported_rates_len =
2634                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2635         params.listen_interval =
2636                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2637
2638         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
2639         if (!params.aid || params.aid > IEEE80211_MAX_AID)
2640                 return -EINVAL;
2641
2642         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2643                 params.ht_capa =
2644                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2645
2646         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2647                 params.plink_action =
2648                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2649
2650         if (parse_station_flags(info, &params))
2651                 return -EINVAL;
2652
2653         /* parse WME attributes if sta is WME capable */
2654         if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
2655             (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
2656             info->attrs[NL80211_ATTR_STA_WME]) {
2657                 struct nlattr *tb[NL80211_STA_WME_MAX + 1];
2658                 struct nlattr *nla;
2659
2660                 nla = info->attrs[NL80211_ATTR_STA_WME];
2661                 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
2662                                        nl80211_sta_wme_policy);
2663                 if (err)
2664                         return err;
2665
2666                 if (tb[NL80211_STA_WME_UAPSD_QUEUES])
2667                         params.uapsd_queues =
2668                              nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
2669                 if (params.uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
2670                         return -EINVAL;
2671
2672                 if (tb[NL80211_STA_WME_MAX_SP])
2673                         params.max_sp =
2674                              nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
2675
2676                 if (params.max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
2677                         return -EINVAL;
2678
2679                 params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
2680         }
2681
2682         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2683             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2684             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2685             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO &&
2686             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION)
2687                 return -EINVAL;
2688
2689         /*
2690          * Only managed stations can add TDLS peers, and only when the
2691          * wiphy supports external TDLS setup.
2692          */
2693         if (dev->ieee80211_ptr->iftype == NL80211_IFTYPE_STATION &&
2694             !((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
2695               (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
2696               (rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)))
2697                 return -EINVAL;
2698
2699         err = get_vlan(info, rdev, &params.vlan);
2700         if (err)
2701                 goto out;
2702
2703         /* validate settings */
2704         err = 0;
2705
2706         if (!rdev->ops->add_station) {
2707                 err = -EOPNOTSUPP;
2708                 goto out;
2709         }
2710
2711         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
2712
2713  out:
2714         if (params.vlan)
2715                 dev_put(params.vlan);
2716         return err;
2717 }
2718
2719 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
2720 {
2721         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2722         struct net_device *dev = info->user_ptr[1];
2723         u8 *mac_addr = NULL;
2724
2725         if (info->attrs[NL80211_ATTR_MAC])
2726                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2727
2728         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2729             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
2730             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
2731             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2732                 return -EINVAL;
2733
2734         if (!rdev->ops->del_station)
2735                 return -EOPNOTSUPP;
2736
2737         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
2738 }
2739
2740 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
2741                                 int flags, struct net_device *dev,
2742                                 u8 *dst, u8 *next_hop,
2743                                 struct mpath_info *pinfo)
2744 {
2745         void *hdr;
2746         struct nlattr *pinfoattr;
2747
2748         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2749         if (!hdr)
2750                 return -1;
2751
2752         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
2753         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
2754         NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
2755
2756         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, pinfo->generation);
2757
2758         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
2759         if (!pinfoattr)
2760                 goto nla_put_failure;
2761         if (pinfo->filled & MPATH_INFO_FRAME_QLEN)
2762                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
2763                             pinfo->frame_qlen);
2764         if (pinfo->filled & MPATH_INFO_SN)
2765                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_SN,
2766                             pinfo->sn);
2767         if (pinfo->filled & MPATH_INFO_METRIC)
2768                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_METRIC,
2769                             pinfo->metric);
2770         if (pinfo->filled & MPATH_INFO_EXPTIME)
2771                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_EXPTIME,
2772                             pinfo->exptime);
2773         if (pinfo->filled & MPATH_INFO_FLAGS)
2774                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_FLAGS,
2775                             pinfo->flags);
2776         if (pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT)
2777                 NLA_PUT_U32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
2778                             pinfo->discovery_timeout);
2779         if (pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES)
2780                 NLA_PUT_U8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
2781                             pinfo->discovery_retries);
2782
2783         nla_nest_end(msg, pinfoattr);
2784
2785         return genlmsg_end(msg, hdr);
2786
2787  nla_put_failure:
2788         genlmsg_cancel(msg, hdr);
2789         return -EMSGSIZE;
2790 }
2791
2792 static int nl80211_dump_mpath(struct sk_buff *skb,
2793                               struct netlink_callback *cb)
2794 {
2795         struct mpath_info pinfo;
2796         struct cfg80211_registered_device *dev;
2797         struct net_device *netdev;
2798         u8 dst[ETH_ALEN];
2799         u8 next_hop[ETH_ALEN];
2800         int path_idx = cb->args[1];
2801         int err;
2802
2803         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2804         if (err)
2805                 return err;
2806
2807         if (!dev->ops->dump_mpath) {
2808                 err = -EOPNOTSUPP;
2809                 goto out_err;
2810         }
2811
2812         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
2813                 err = -EOPNOTSUPP;
2814                 goto out_err;
2815         }
2816
2817         while (1) {
2818                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
2819                                            dst, next_hop, &pinfo);
2820                 if (err == -ENOENT)
2821                         break;
2822                 if (err)
2823                         goto out_err;
2824
2825                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
2826                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
2827                                        netdev, dst, next_hop,
2828                                        &pinfo) < 0)
2829                         goto out;
2830
2831                 path_idx++;
2832         }
2833
2834
2835  out:
2836         cb->args[1] = path_idx;
2837         err = skb->len;
2838  out_err:
2839         nl80211_finish_netdev_dump(dev);
2840         return err;
2841 }
2842
2843 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
2844 {
2845         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2846         int err;
2847         struct net_device *dev = info->user_ptr[1];
2848         struct mpath_info pinfo;
2849         struct sk_buff *msg;
2850         u8 *dst = NULL;
2851         u8 next_hop[ETH_ALEN];
2852
2853         memset(&pinfo, 0, sizeof(pinfo));
2854
2855         if (!info->attrs[NL80211_ATTR_MAC])
2856                 return -EINVAL;
2857
2858         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2859
2860         if (!rdev->ops->get_mpath)
2861                 return -EOPNOTSUPP;
2862
2863         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2864                 return -EOPNOTSUPP;
2865
2866         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
2867         if (err)
2868                 return err;
2869
2870         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2871         if (!msg)
2872                 return -ENOMEM;
2873
2874         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
2875                                  dev, dst, next_hop, &pinfo) < 0) {
2876                 nlmsg_free(msg);
2877                 return -ENOBUFS;
2878         }
2879
2880         return genlmsg_reply(msg, info);
2881 }
2882
2883 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
2884 {
2885         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2886         struct net_device *dev = info->user_ptr[1];
2887         u8 *dst = NULL;
2888         u8 *next_hop = NULL;
2889
2890         if (!info->attrs[NL80211_ATTR_MAC])
2891                 return -EINVAL;
2892
2893         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2894                 return -EINVAL;
2895
2896         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2897         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2898
2899         if (!rdev->ops->change_mpath)
2900                 return -EOPNOTSUPP;
2901
2902         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2903                 return -EOPNOTSUPP;
2904
2905         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
2906 }
2907
2908 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
2909 {
2910         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2911         struct net_device *dev = info->user_ptr[1];
2912         u8 *dst = NULL;
2913         u8 *next_hop = NULL;
2914
2915         if (!info->attrs[NL80211_ATTR_MAC])
2916                 return -EINVAL;
2917
2918         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
2919                 return -EINVAL;
2920
2921         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2922         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
2923
2924         if (!rdev->ops->add_mpath)
2925                 return -EOPNOTSUPP;
2926
2927         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
2928                 return -EOPNOTSUPP;
2929
2930         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
2931 }
2932
2933 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
2934 {
2935         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2936         struct net_device *dev = info->user_ptr[1];
2937         u8 *dst = NULL;
2938
2939         if (info->attrs[NL80211_ATTR_MAC])
2940                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
2941
2942         if (!rdev->ops->del_mpath)
2943                 return -EOPNOTSUPP;
2944
2945         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
2946 }
2947
2948 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
2949 {
2950         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2951         struct net_device *dev = info->user_ptr[1];
2952         struct bss_parameters params;
2953
2954         memset(&params, 0, sizeof(params));
2955         /* default to not changing parameters */
2956         params.use_cts_prot = -1;
2957         params.use_short_preamble = -1;
2958         params.use_short_slot_time = -1;
2959         params.ap_isolate = -1;
2960         params.ht_opmode = -1;
2961
2962         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
2963                 params.use_cts_prot =
2964                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
2965         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
2966                 params.use_short_preamble =
2967                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
2968         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
2969                 params.use_short_slot_time =
2970                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
2971         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
2972                 params.basic_rates =
2973                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2974                 params.basic_rates_len =
2975                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
2976         }
2977         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
2978                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
2979         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
2980                 params.ht_opmode =
2981                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
2982
2983         if (!rdev->ops->change_bss)
2984                 return -EOPNOTSUPP;
2985
2986         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2987             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2988                 return -EOPNOTSUPP;
2989
2990         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
2991 }
2992
2993 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
2994         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
2995         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
2996         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
2997         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
2998         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
2999         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3000 };
3001
3002 static int parse_reg_rule(struct nlattr *tb[],
3003         struct ieee80211_reg_rule *reg_rule)
3004 {
3005         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3006         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3007
3008         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3009                 return -EINVAL;
3010         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3011                 return -EINVAL;
3012         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3013                 return -EINVAL;
3014         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3015                 return -EINVAL;
3016         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3017                 return -EINVAL;
3018
3019         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3020
3021         freq_range->start_freq_khz =
3022                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3023         freq_range->end_freq_khz =
3024                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3025         freq_range->max_bandwidth_khz =
3026                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3027
3028         power_rule->max_eirp =
3029                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3030
3031         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3032                 power_rule->max_antenna_gain =
3033                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3034
3035         return 0;
3036 }
3037
3038 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3039 {
3040         int r;
3041         char *data = NULL;
3042
3043         /*
3044          * You should only get this when cfg80211 hasn't yet initialized
3045          * completely when built-in to the kernel right between the time
3046          * window between nl80211_init() and regulatory_init(), if that is
3047          * even possible.
3048          */
3049         mutex_lock(&cfg80211_mutex);
3050         if (unlikely(!cfg80211_regdomain)) {
3051                 mutex_unlock(&cfg80211_mutex);
3052                 return -EINPROGRESS;
3053         }
3054         mutex_unlock(&cfg80211_mutex);
3055
3056         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3057                 return -EINVAL;
3058
3059         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3060
3061         r = regulatory_hint_user(data);
3062
3063         return r;
3064 }
3065
3066 static int nl80211_get_mesh_config(struct sk_buff *skb,
3067                                    struct genl_info *info)
3068 {
3069         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3070         struct net_device *dev = info->user_ptr[1];
3071         struct wireless_dev *wdev = dev->ieee80211_ptr;
3072         struct mesh_config cur_params;
3073         int err = 0;
3074         void *hdr;
3075         struct nlattr *pinfoattr;
3076         struct sk_buff *msg;
3077
3078         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3079                 return -EOPNOTSUPP;
3080
3081         if (!rdev->ops->get_mesh_config)
3082                 return -EOPNOTSUPP;
3083
3084         wdev_lock(wdev);
3085         /* If not connected, get default parameters */
3086         if (!wdev->mesh_id_len)
3087                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3088         else
3089                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3090                                                  &cur_params);
3091         wdev_unlock(wdev);
3092
3093         if (err)
3094                 return err;
3095
3096         /* Draw up a netlink message to send back */
3097         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3098         if (!msg)
3099                 return -ENOMEM;
3100         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3101                              NL80211_CMD_GET_MESH_CONFIG);
3102         if (!hdr)
3103                 goto out;
3104         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3105         if (!pinfoattr)
3106                 goto nla_put_failure;
3107         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
3108         NLA_PUT_U16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3109                         cur_params.dot11MeshRetryTimeout);
3110         NLA_PUT_U16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3111                         cur_params.dot11MeshConfirmTimeout);
3112         NLA_PUT_U16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3113                         cur_params.dot11MeshHoldingTimeout);
3114         NLA_PUT_U16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3115                         cur_params.dot11MeshMaxPeerLinks);
3116         NLA_PUT_U8(msg, NL80211_MESHCONF_MAX_RETRIES,
3117                         cur_params.dot11MeshMaxRetries);
3118         NLA_PUT_U8(msg, NL80211_MESHCONF_TTL,
3119                         cur_params.dot11MeshTTL);
3120         NLA_PUT_U8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3121                         cur_params.element_ttl);
3122         NLA_PUT_U8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3123                         cur_params.auto_open_plinks);
3124         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3125                         cur_params.dot11MeshHWMPmaxPREQretries);
3126         NLA_PUT_U32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3127                         cur_params.path_refresh_time);
3128         NLA_PUT_U16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3129                         cur_params.min_discovery_timeout);
3130         NLA_PUT_U32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3131                         cur_params.dot11MeshHWMPactivePathTimeout);
3132         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3133                         cur_params.dot11MeshHWMPpreqMinInterval);
3134         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3135                         cur_params.dot11MeshHWMPnetDiameterTraversalTime);
3136         NLA_PUT_U8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3137                         cur_params.dot11MeshHWMPRootMode);
3138         NLA_PUT_U16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3139                         cur_params.dot11MeshHWMPRannInterval);
3140         NLA_PUT_U8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3141                         cur_params.dot11MeshGateAnnouncementProtocol);
3142         nla_nest_end(msg, pinfoattr);
3143         genlmsg_end(msg, hdr);
3144         return genlmsg_reply(msg, info);
3145
3146  nla_put_failure:
3147         genlmsg_cancel(msg, hdr);
3148  out:
3149         nlmsg_free(msg);
3150         return -ENOBUFS;
3151 }
3152
3153 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3154         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3155         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3156         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3157         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3158         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3159         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3160         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3161         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3162
3163         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3164         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3165         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3166         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3167         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3168         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3169         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3170         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3171         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3172 };
3173
3174 static const struct nla_policy
3175         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3176         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3177         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3178         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3179         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3180                 .len = IEEE80211_MAX_DATA_LEN },
3181         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3182 };
3183
3184 static int nl80211_parse_mesh_config(struct genl_info *info,
3185                                      struct mesh_config *cfg,
3186                                      u32 *mask_out)
3187 {
3188         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3189         u32 mask = 0;
3190
3191 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3192 do {\
3193         if (table[attr_num]) {\
3194                 cfg->param = nla_fn(table[attr_num]); \
3195                 mask |= (1 << (attr_num - 1)); \
3196         } \
3197 } while (0);\
3198
3199
3200         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3201                 return -EINVAL;
3202         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3203                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3204                              nl80211_meshconf_params_policy))
3205                 return -EINVAL;
3206
3207         /* This makes sure that there aren't more than 32 mesh config
3208          * parameters (otherwise our bitfield scheme would not work.) */
3209         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3210
3211         /* Fill in the params struct */
3212         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3213                         mask, NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
3214         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3215                         mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, nla_get_u16);
3216         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3217                         mask, NL80211_MESHCONF_HOLDING_TIMEOUT, nla_get_u16);
3218         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3219                         mask, NL80211_MESHCONF_MAX_PEER_LINKS, nla_get_u16);
3220         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3221                         mask, NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
3222         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3223                         mask, NL80211_MESHCONF_TTL, nla_get_u8);
3224         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3225                         mask, NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
3226         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3227                         mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, nla_get_u8);
3228         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3229                         mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3230                         nla_get_u8);
3231         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3232                         mask, NL80211_MESHCONF_PATH_REFRESH_TIME, nla_get_u32);
3233         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3234                         mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3235                         nla_get_u16);
3236         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
3237                         mask, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3238                         nla_get_u32);
3239         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3240                         mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3241                         nla_get_u16);
3242         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3243                         dot11MeshHWMPnetDiameterTraversalTime,
3244                         mask, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3245                         nla_get_u16);
3246         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3247                         dot11MeshHWMPRootMode, mask,
3248                         NL80211_MESHCONF_HWMP_ROOTMODE,
3249                         nla_get_u8);
3250         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3251                         dot11MeshHWMPRannInterval, mask,
3252                         NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3253                         nla_get_u16);
3254         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3255                         dot11MeshGateAnnouncementProtocol, mask,
3256                         NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3257                         nla_get_u8);
3258         if (mask_out)
3259                 *mask_out = mask;
3260
3261         return 0;
3262
3263 #undef FILL_IN_MESH_PARAM_IF_SET
3264 }
3265
3266 static int nl80211_parse_mesh_setup(struct genl_info *info,
3267                                      struct mesh_setup *setup)
3268 {
3269         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3270
3271         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3272                 return -EINVAL;
3273         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3274                              info->attrs[NL80211_ATTR_MESH_SETUP],
3275                              nl80211_mesh_setup_params_policy))
3276                 return -EINVAL;
3277
3278         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3279                 setup->path_sel_proto =
3280                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3281                  IEEE80211_PATH_PROTOCOL_VENDOR :
3282                  IEEE80211_PATH_PROTOCOL_HWMP;
3283
3284         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3285                 setup->path_metric =
3286                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3287                  IEEE80211_PATH_METRIC_VENDOR :
3288                  IEEE80211_PATH_METRIC_AIRTIME;
3289
3290
3291         if (tb[NL80211_MESH_SETUP_IE]) {
3292                 struct nlattr *ieattr =
3293                         tb[NL80211_MESH_SETUP_IE];
3294                 if (!is_valid_ie_attr(ieattr))
3295                         return -EINVAL;
3296                 setup->ie = nla_data(ieattr);
3297                 setup->ie_len = nla_len(ieattr);
3298         }
3299         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3300         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3301
3302         return 0;
3303 }
3304
3305 static int nl80211_update_mesh_config(struct sk_buff *skb,
3306                                       struct genl_info *info)
3307 {
3308         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3309         struct net_device *dev = info->user_ptr[1];
3310         struct wireless_dev *wdev = dev->ieee80211_ptr;
3311         struct mesh_config cfg;
3312         u32 mask;
3313         int err;
3314
3315         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3316                 return -EOPNOTSUPP;
3317
3318         if (!rdev->ops->update_mesh_config)
3319                 return -EOPNOTSUPP;
3320
3321         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3322         if (err)
3323                 return err;
3324
3325         wdev_lock(wdev);
3326         if (!wdev->mesh_id_len)
3327                 err = -ENOLINK;
3328
3329         if (!err)
3330                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3331                                                     mask, &cfg);
3332
3333         wdev_unlock(wdev);
3334
3335         return err;
3336 }
3337
3338 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3339 {
3340         struct sk_buff *msg;
3341         void *hdr = NULL;
3342         struct nlattr *nl_reg_rules;
3343         unsigned int i;
3344         int err = -EINVAL;
3345
3346         mutex_lock(&cfg80211_mutex);
3347
3348         if (!cfg80211_regdomain)
3349                 goto out;
3350
3351         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3352         if (!msg) {
3353                 err = -ENOBUFS;
3354                 goto out;
3355         }
3356
3357         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3358                              NL80211_CMD_GET_REG);
3359         if (!hdr)
3360                 goto put_failure;
3361
3362         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2,
3363                 cfg80211_regdomain->alpha2);
3364
3365         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3366         if (!nl_reg_rules)
3367                 goto nla_put_failure;
3368
3369         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3370                 struct nlattr *nl_reg_rule;
3371                 const struct ieee80211_reg_rule *reg_rule;
3372                 const struct ieee80211_freq_range *freq_range;
3373                 const struct ieee80211_power_rule *power_rule;
3374
3375                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3376                 freq_range = &reg_rule->freq_range;
3377                 power_rule = &reg_rule->power_rule;
3378
3379                 nl_reg_rule = nla_nest_start(msg, i);
3380                 if (!nl_reg_rule)
3381                         goto nla_put_failure;
3382
3383                 NLA_PUT_U32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3384                         reg_rule->flags);
3385                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_START,
3386                         freq_range->start_freq_khz);
3387                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_END,
3388                         freq_range->end_freq_khz);
3389                 NLA_PUT_U32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3390                         freq_range->max_bandwidth_khz);
3391                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3392                         power_rule->max_antenna_gain);
3393                 NLA_PUT_U32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3394                         power_rule->max_eirp);
3395
3396                 nla_nest_end(msg, nl_reg_rule);
3397         }
3398
3399         nla_nest_end(msg, nl_reg_rules);
3400
3401         genlmsg_end(msg, hdr);
3402         err = genlmsg_reply(msg, info);
3403         goto out;
3404
3405 nla_put_failure:
3406         genlmsg_cancel(msg, hdr);
3407 put_failure:
3408         nlmsg_free(msg);
3409         err = -EMSGSIZE;
3410 out:
3411         mutex_unlock(&cfg80211_mutex);
3412         return err;
3413 }
3414
3415 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3416 {
3417         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3418         struct nlattr *nl_reg_rule;
3419         char *alpha2 = NULL;
3420         int rem_reg_rules = 0, r = 0;
3421         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3422         struct ieee80211_regdomain *rd = NULL;
3423
3424         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3425                 return -EINVAL;
3426
3427         if (!info->attrs[NL80211_ATTR_REG_RULES])
3428                 return -EINVAL;
3429
3430         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3431
3432         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3433                         rem_reg_rules) {
3434                 num_rules++;
3435                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3436                         return -EINVAL;
3437         }
3438
3439         mutex_lock(&cfg80211_mutex);
3440
3441         if (!reg_is_valid_request(alpha2)) {
3442                 r = -EINVAL;
3443                 goto bad_reg;
3444         }
3445
3446         size_of_regd = sizeof(struct ieee80211_regdomain) +
3447                 (num_rules * sizeof(struct ieee80211_reg_rule));
3448
3449         rd = kzalloc(size_of_regd, GFP_KERNEL);
3450         if (!rd) {
3451                 r = -ENOMEM;
3452                 goto bad_reg;
3453         }
3454
3455         rd->n_reg_rules = num_rules;
3456         rd->alpha2[0] = alpha2[0];
3457         rd->alpha2[1] = alpha2[1];
3458
3459         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3460                         rem_reg_rules) {
3461                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3462                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3463                         reg_rule_policy);
3464                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3465                 if (r)
3466                         goto bad_reg;
3467
3468                 rule_idx++;
3469
3470                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3471                         r = -EINVAL;
3472                         goto bad_reg;
3473                 }
3474         }
3475
3476         BUG_ON(rule_idx != num_rules);
3477
3478         r = set_regdom(rd);
3479
3480         mutex_unlock(&cfg80211_mutex);
3481
3482         return r;
3483
3484  bad_reg:
3485         mutex_unlock(&cfg80211_mutex);
3486         kfree(rd);
3487         return r;
3488 }
3489
3490 static int validate_scan_freqs(struct nlattr *freqs)
3491 {
3492         struct nlattr *attr1, *attr2;
3493         int n_channels = 0, tmp1, tmp2;
3494
3495         nla_for_each_nested(attr1, freqs, tmp1) {
3496                 n_channels++;
3497                 /*
3498                  * Some hardware has a limited channel list for
3499                  * scanning, and it is pretty much nonsensical
3500                  * to scan for a channel twice, so disallow that
3501                  * and don't require drivers to check that the
3502                  * channel list they get isn't longer than what
3503                  * they can scan, as long as they can scan all
3504                  * the channels they registered at once.
3505                  */
3506                 nla_for_each_nested(attr2, freqs, tmp2)
3507                         if (attr1 != attr2 &&
3508                             nla_get_u32(attr1) == nla_get_u32(attr2))
3509                                 return 0;
3510         }
3511
3512         return n_channels;
3513 }
3514
3515 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
3516 {
3517         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3518         struct net_device *dev = info->user_ptr[1];
3519         struct cfg80211_scan_request *request;
3520         struct nlattr *attr;
3521         struct wiphy *wiphy;
3522         int err, tmp, n_ssids = 0, n_channels, i;
3523         size_t ie_len;
3524
3525         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3526                 return -EINVAL;
3527
3528         wiphy = &rdev->wiphy;
3529
3530         if (!rdev->ops->scan)
3531                 return -EOPNOTSUPP;
3532
3533         if (rdev->scan_req)
3534                 return -EBUSY;
3535
3536         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3537                 n_channels = validate_scan_freqs(
3538                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3539                 if (!n_channels)
3540                         return -EINVAL;
3541         } else {
3542                 enum ieee80211_band band;
3543                 n_channels = 0;
3544
3545                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3546                         if (wiphy->bands[band])
3547                                 n_channels += wiphy->bands[band]->n_channels;
3548         }
3549
3550         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3551                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
3552                         n_ssids++;
3553
3554         if (n_ssids > wiphy->max_scan_ssids)
3555                 return -EINVAL;
3556
3557         if (info->attrs[NL80211_ATTR_IE])
3558                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3559         else
3560                 ie_len = 0;
3561
3562         if (ie_len > wiphy->max_scan_ie_len)
3563                 return -EINVAL;
3564
3565         request = kzalloc(sizeof(*request)
3566                         + sizeof(*request->ssids) * n_ssids
3567                         + sizeof(*request->channels) * n_channels
3568                         + ie_len, GFP_KERNEL);
3569         if (!request)
3570                 return -ENOMEM;
3571
3572         if (n_ssids)
3573                 request->ssids = (void *)&request->channels[n_channels];
3574         request->n_ssids = n_ssids;
3575         if (ie_len) {
3576                 if (request->ssids)
3577                         request->ie = (void *)(request->ssids + n_ssids);
3578                 else
3579                         request->ie = (void *)(request->channels + n_channels);
3580         }
3581
3582         i = 0;
3583         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3584                 /* user specified, bail out if channel not found */
3585                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
3586                         struct ieee80211_channel *chan;
3587
3588                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3589
3590                         if (!chan) {
3591                                 err = -EINVAL;
3592                                 goto out_free;
3593                         }
3594
3595                         /* ignore disabled channels */
3596                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3597                                 continue;
3598
3599                         request->channels[i] = chan;
3600                         i++;
3601                 }
3602         } else {
3603                 enum ieee80211_band band;
3604
3605                 /* all channels */
3606                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3607                         int j;
3608                         if (!wiphy->bands[band])
3609                                 continue;
3610                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3611                                 struct ieee80211_channel *chan;
3612
3613                                 chan = &wiphy->bands[band]->channels[j];
3614
3615                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3616                                         continue;
3617
3618                                 request->channels[i] = chan;
3619                                 i++;
3620                         }
3621                 }
3622         }
3623
3624         if (!i) {
3625                 err = -EINVAL;
3626                 goto out_free;
3627         }
3628
3629         request->n_channels = i;
3630
3631         i = 0;
3632         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3633                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
3634                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3635                                 err = -EINVAL;
3636                                 goto out_free;
3637                         }
3638                         request->ssids[i].ssid_len = nla_len(attr);
3639                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
3640                         i++;
3641                 }
3642         }
3643
3644         if (info->attrs[NL80211_ATTR_IE]) {
3645                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3646                 memcpy((void *)request->ie,
3647                        nla_data(info->attrs[NL80211_ATTR_IE]),
3648                        request->ie_len);
3649         }
3650
3651         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
3652                 if (wiphy->bands[i])
3653                         request->rates[i] =
3654                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
3655
3656         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
3657                 nla_for_each_nested(attr,
3658                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
3659                                     tmp) {
3660                         enum ieee80211_band band = nla_type(attr);
3661
3662                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
3663                                 err = -EINVAL;
3664                                 goto out_free;
3665                         }
3666                         err = ieee80211_get_ratemask(wiphy->bands[band],
3667                                                      nla_data(attr),
3668                                                      nla_len(attr),
3669                                                      &request->rates[band]);
3670                         if (err)
3671                                 goto out_free;
3672                 }
3673         }
3674
3675         request->no_cck =
3676                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
3677
3678         request->dev = dev;
3679         request->wiphy = &rdev->wiphy;
3680
3681         rdev->scan_req = request;
3682         err = rdev->ops->scan(&rdev->wiphy, dev, request);
3683
3684         if (!err) {
3685                 nl80211_send_scan_start(rdev, dev);
3686                 dev_hold(dev);
3687         } else {
3688  out_free:
3689                 rdev->scan_req = NULL;
3690                 kfree(request);
3691         }
3692
3693         return err;
3694 }
3695
3696 static int nl80211_start_sched_scan(struct sk_buff *skb,
3697                                     struct genl_info *info)
3698 {
3699         struct cfg80211_sched_scan_request *request;
3700         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3701         struct net_device *dev = info->user_ptr[1];
3702         struct nlattr *attr;
3703         struct wiphy *wiphy;
3704         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
3705         u32 interval;
3706         enum ieee80211_band band;
3707         size_t ie_len;
3708         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
3709
3710         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3711             !rdev->ops->sched_scan_start)
3712                 return -EOPNOTSUPP;
3713
3714         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
3715                 return -EINVAL;
3716
3717         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
3718                 return -EINVAL;
3719
3720         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
3721         if (interval == 0)
3722                 return -EINVAL;
3723
3724         wiphy = &rdev->wiphy;
3725
3726         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3727                 n_channels = validate_scan_freqs(
3728                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
3729                 if (!n_channels)
3730                         return -EINVAL;
3731         } else {
3732                 n_channels = 0;
3733
3734                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
3735                         if (wiphy->bands[band])
3736                                 n_channels += wiphy->bands[band]->n_channels;
3737         }
3738
3739         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
3740                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3741                                     tmp)
3742                         n_ssids++;
3743
3744         if (n_ssids > wiphy->max_sched_scan_ssids)
3745                 return -EINVAL;
3746
3747         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
3748                 nla_for_each_nested(attr,
3749                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3750                                     tmp)
3751                         n_match_sets++;
3752
3753         if (n_match_sets > wiphy->max_match_sets)
3754                 return -EINVAL;
3755
3756         if (info->attrs[NL80211_ATTR_IE])
3757                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3758         else
3759                 ie_len = 0;
3760
3761         if (ie_len > wiphy->max_sched_scan_ie_len)
3762                 return -EINVAL;
3763
3764         mutex_lock(&rdev->sched_scan_mtx);
3765
3766         if (rdev->sched_scan_req) {
3767                 err = -EINPROGRESS;
3768                 goto out;
3769         }
3770
3771         request = kzalloc(sizeof(*request)
3772                         + sizeof(*request->ssids) * n_ssids
3773                         + sizeof(*request->match_sets) * n_match_sets
3774                         + sizeof(*request->channels) * n_channels
3775                         + ie_len, GFP_KERNEL);
3776         if (!request) {
3777                 err = -ENOMEM;
3778                 goto out;
3779         }
3780
3781         if (n_ssids)
3782                 request->ssids = (void *)&request->channels[n_channels];
3783         request->n_ssids = n_ssids;
3784         if (ie_len) {
3785                 if (request->ssids)
3786                         request->ie = (void *)(request->ssids + n_ssids);
3787                 else
3788                         request->ie = (void *)(request->channels + n_channels);
3789         }
3790
3791         if (n_match_sets) {
3792                 if (request->ie)
3793                         request->match_sets = (void *)(request->ie + ie_len);
3794                 else if (request->ssids)
3795                         request->match_sets =
3796                                 (void *)(request->ssids + n_ssids);
3797                 else
3798                         request->match_sets =
3799                                 (void *)(request->channels + n_channels);
3800         }
3801         request->n_match_sets = n_match_sets;
3802
3803         i = 0;
3804         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
3805                 /* user specified, bail out if channel not found */
3806                 nla_for_each_nested(attr,
3807                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
3808                                     tmp) {
3809                         struct ieee80211_channel *chan;
3810
3811                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
3812
3813                         if (!chan) {
3814                                 err = -EINVAL;
3815                                 goto out_free;
3816                         }
3817
3818                         /* ignore disabled channels */
3819                         if (chan->flags & IEEE80211_CHAN_DISABLED)
3820                                 continue;
3821
3822                         request->channels[i] = chan;
3823                         i++;
3824                 }
3825         } else {
3826                 /* all channels */
3827                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
3828                         int j;
3829                         if (!wiphy->bands[band])
3830                                 continue;
3831                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
3832                                 struct ieee80211_channel *chan;
3833
3834                                 chan = &wiphy->bands[band]->channels[j];
3835
3836                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
3837                                         continue;
3838
3839                                 request->channels[i] = chan;
3840                                 i++;
3841                         }
3842                 }
3843         }
3844
3845         if (!i) {
3846                 err = -EINVAL;
3847                 goto out_free;
3848         }
3849
3850         request->n_channels = i;
3851
3852         i = 0;
3853         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
3854                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
3855                                     tmp) {
3856                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
3857                                 err = -EINVAL;
3858                                 goto out_free;
3859                         }
3860                         request->ssids[i].ssid_len = nla_len(attr);
3861                         memcpy(request->ssids[i].ssid, nla_data(attr),
3862                                nla_len(attr));
3863                         i++;
3864                 }
3865         }
3866
3867         i = 0;
3868         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
3869                 nla_for_each_nested(attr,
3870                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
3871                                     tmp) {
3872                         struct nlattr *ssid;
3873
3874                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
3875                                   nla_data(attr), nla_len(attr),
3876                                   nl80211_match_policy);
3877                         ssid = tb[NL80211_ATTR_SCHED_SCAN_MATCH_SSID];
3878                         if (ssid) {
3879                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
3880                                         err = -EINVAL;
3881                                         goto out_free;
3882                                 }
3883                                 memcpy(request->match_sets[i].ssid.ssid,
3884                                        nla_data(ssid), nla_len(ssid));
3885                                 request->match_sets[i].ssid.ssid_len =
3886                                         nla_len(ssid);
3887                         }
3888                         i++;
3889                 }
3890         }
3891
3892         if (info->attrs[NL80211_ATTR_IE]) {
3893                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
3894                 memcpy((void *)request->ie,
3895                        nla_data(info->attrs[NL80211_ATTR_IE]),
3896                        request->ie_len);
3897         }
3898
3899         request->dev = dev;
3900         request->wiphy = &rdev->wiphy;
3901         request->interval = interval;
3902
3903         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
3904         if (!err) {
3905                 rdev->sched_scan_req = request;
3906                 nl80211_send_sched_scan(rdev, dev,
3907                                         NL80211_CMD_START_SCHED_SCAN);
3908                 goto out;
3909         }
3910
3911 out_free:
3912         kfree(request);
3913 out:
3914         mutex_unlock(&rdev->sched_scan_mtx);
3915         return err;
3916 }
3917
3918 static int nl80211_stop_sched_scan(struct sk_buff *skb,
3919                                    struct genl_info *info)
3920 {
3921         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3922         int err;
3923
3924         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
3925             !rdev->ops->sched_scan_stop)
3926                 return -EOPNOTSUPP;
3927
3928         mutex_lock(&rdev->sched_scan_mtx);
3929         err = __cfg80211_stop_sched_scan(rdev, false);
3930         mutex_unlock(&rdev->sched_scan_mtx);
3931
3932         return err;
3933 }
3934
3935 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
3936                             u32 seq, int flags,
3937                             struct cfg80211_registered_device *rdev,
3938                             struct wireless_dev *wdev,
3939                             struct cfg80211_internal_bss *intbss)
3940 {
3941         struct cfg80211_bss *res = &intbss->pub;
3942         void *hdr;
3943         struct nlattr *bss;
3944         int i;
3945
3946         ASSERT_WDEV_LOCK(wdev);
3947
3948         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
3949                              NL80211_CMD_NEW_SCAN_RESULTS);
3950         if (!hdr)
3951                 return -1;
3952
3953         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
3954
3955         NLA_PUT_U32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation);
3956         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex);
3957
3958         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
3959         if (!bss)
3960                 goto nla_put_failure;
3961         if (!is_zero_ether_addr(res->bssid))
3962                 NLA_PUT(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid);
3963         if (res->information_elements && res->len_information_elements)
3964                 NLA_PUT(msg, NL80211_BSS_INFORMATION_ELEMENTS,
3965                         res->len_information_elements,
3966                         res->information_elements);
3967         if (res->beacon_ies && res->len_beacon_ies &&
3968             res->beacon_ies != res->information_elements)
3969                 NLA_PUT(msg, NL80211_BSS_BEACON_IES,
3970                         res->len_beacon_ies, res->beacon_ies);
3971         if (res->tsf)
3972                 NLA_PUT_U64(msg, NL80211_BSS_TSF, res->tsf);
3973         if (res->beacon_interval)
3974                 NLA_PUT_U16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval);
3975         NLA_PUT_U16(msg, NL80211_BSS_CAPABILITY, res->capability);
3976         NLA_PUT_U32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq);
3977         NLA_PUT_U32(msg, NL80211_BSS_SEEN_MS_AGO,
3978                 jiffies_to_msecs(jiffies - intbss->ts));
3979
3980         switch (rdev->wiphy.signal_type) {
3981         case CFG80211_SIGNAL_TYPE_MBM:
3982                 NLA_PUT_U32(msg, NL80211_BSS_SIGNAL_MBM, res->signal);
3983                 break;
3984         case CFG80211_SIGNAL_TYPE_UNSPEC:
3985                 NLA_PUT_U8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal);
3986                 break;
3987         default:
3988                 break;
3989         }
3990
3991         switch (wdev->iftype) {
3992         case NL80211_IFTYPE_P2P_CLIENT:
3993         case NL80211_IFTYPE_STATION:
3994                 if (intbss == wdev->current_bss)
3995                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
3996                                     NL80211_BSS_STATUS_ASSOCIATED);
3997                 else for (i = 0; i < MAX_AUTH_BSSES; i++) {
3998                         if (intbss != wdev->auth_bsses[i])
3999                                 continue;
4000                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4001                                     NL80211_BSS_STATUS_AUTHENTICATED);
4002                         break;
4003                 }
4004                 break;
4005         case NL80211_IFTYPE_ADHOC:
4006                 if (intbss == wdev->current_bss)
4007                         NLA_PUT_U32(msg, NL80211_BSS_STATUS,
4008                                     NL80211_BSS_STATUS_IBSS_JOINED);
4009                 break;
4010         default:
4011                 break;
4012         }
4013
4014         nla_nest_end(msg, bss);
4015
4016         return genlmsg_end(msg, hdr);
4017
4018  nla_put_failure:
4019         genlmsg_cancel(msg, hdr);
4020         return -EMSGSIZE;
4021 }
4022
4023 static int nl80211_dump_scan(struct sk_buff *skb,
4024                              struct netlink_callback *cb)
4025 {
4026         struct cfg80211_registered_device *rdev;
4027         struct net_device *dev;
4028         struct cfg80211_internal_bss *scan;
4029         struct wireless_dev *wdev;
4030         int start = cb->args[1], idx = 0;
4031         int err;
4032
4033         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4034         if (err)
4035                 return err;
4036
4037         wdev = dev->ieee80211_ptr;
4038
4039         wdev_lock(wdev);
4040         spin_lock_bh(&rdev->bss_lock);
4041         cfg80211_bss_expire(rdev);
4042
4043         cb->seq = rdev->bss_generation;
4044
4045         list_for_each_entry(scan, &rdev->bss_list, list) {
4046                 if (++idx <= start)
4047                         continue;
4048                 if (nl80211_send_bss(skb, cb,
4049                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4050                                 rdev, wdev, scan) < 0) {
4051                         idx--;
4052                         break;
4053                 }
4054         }
4055
4056         spin_unlock_bh(&rdev->bss_lock);
4057         wdev_unlock(wdev);
4058
4059         cb->args[1] = idx;
4060         nl80211_finish_netdev_dump(rdev);
4061
4062         return skb->len;
4063 }
4064
4065 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4066                                 int flags, struct net_device *dev,
4067                                 struct survey_info *survey)
4068 {
4069         void *hdr;
4070         struct nlattr *infoattr;
4071
4072         hdr = nl80211hdr_put(msg, pid, seq, flags,
4073                              NL80211_CMD_NEW_SURVEY_RESULTS);
4074         if (!hdr)
4075                 return -ENOMEM;
4076
4077         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
4078
4079         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4080         if (!infoattr)
4081                 goto nla_put_failure;
4082
4083         NLA_PUT_U32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4084                     survey->channel->center_freq);
4085         if (survey->filled & SURVEY_INFO_NOISE_DBM)
4086                 NLA_PUT_U8(msg, NL80211_SURVEY_INFO_NOISE,
4087                             survey->noise);
4088         if (survey->filled & SURVEY_INFO_IN_USE)
4089                 NLA_PUT_FLAG(msg, NL80211_SURVEY_INFO_IN_USE);
4090         if (survey->filled & SURVEY_INFO_CHANNEL_TIME)
4091                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4092                             survey->channel_time);
4093         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY)
4094                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4095                             survey->channel_time_busy);
4096         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY)
4097                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4098                             survey->channel_time_ext_busy);
4099         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_RX)
4100                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4101                             survey->channel_time_rx);
4102         if (survey->filled & SURVEY_INFO_CHANNEL_TIME_TX)
4103                 NLA_PUT_U64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4104                             survey->channel_time_tx);
4105
4106         nla_nest_end(msg, infoattr);
4107
4108         return genlmsg_end(msg, hdr);
4109
4110  nla_put_failure:
4111         genlmsg_cancel(msg, hdr);
4112         return -EMSGSIZE;
4113 }
4114
4115 static int nl80211_dump_survey(struct sk_buff *skb,
4116                         struct netlink_callback *cb)
4117 {
4118         struct survey_info survey;
4119         struct cfg80211_registered_device *dev;
4120         struct net_device *netdev;
4121         int survey_idx = cb->args[1];
4122         int res;
4123
4124         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4125         if (res)
4126                 return res;
4127
4128         if (!dev->ops->dump_survey) {
4129                 res = -EOPNOTSUPP;
4130                 goto out_err;
4131         }
4132
4133         while (1) {
4134                 struct ieee80211_channel *chan;
4135
4136                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4137                                             &survey);
4138                 if (res == -ENOENT)
4139                         break;
4140                 if (res)
4141                         goto out_err;
4142
4143                 /* Survey without a channel doesn't make sense */
4144                 if (!survey.channel) {
4145                         res = -EINVAL;
4146                         goto out;
4147                 }
4148
4149                 chan = ieee80211_get_channel(&dev->wiphy,
4150                                              survey.channel->center_freq);
4151                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4152                         survey_idx++;
4153                         continue;
4154                 }
4155
4156                 if (nl80211_send_survey(skb,
4157                                 NETLINK_CB(cb->skb).pid,
4158                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4159                                 netdev,
4160                                 &survey) < 0)
4161                         goto out;
4162                 survey_idx++;
4163         }
4164
4165  out:
4166         cb->args[1] = survey_idx;
4167         res = skb->len;
4168  out_err:
4169         nl80211_finish_netdev_dump(dev);
4170         return res;
4171 }
4172
4173 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4174 {
4175         return auth_type <= NL80211_AUTHTYPE_MAX;
4176 }
4177
4178 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4179 {
4180         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4181                                   NL80211_WPA_VERSION_2));
4182 }
4183
4184 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4185 {
4186         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4187         struct net_device *dev = info->user_ptr[1];
4188         struct ieee80211_channel *chan;
4189         const u8 *bssid, *ssid, *ie = NULL;
4190         int err, ssid_len, ie_len = 0;
4191         enum nl80211_auth_type auth_type;
4192         struct key_parse key;
4193         bool local_state_change;
4194
4195         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4196                 return -EINVAL;
4197
4198         if (!info->attrs[NL80211_ATTR_MAC])
4199                 return -EINVAL;
4200
4201         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4202                 return -EINVAL;
4203
4204         if (!info->attrs[NL80211_ATTR_SSID])
4205                 return -EINVAL;
4206
4207         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4208                 return -EINVAL;
4209
4210         err = nl80211_parse_key(info, &key);
4211         if (err)
4212                 return err;
4213
4214         if (key.idx >= 0) {
4215                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4216                         return -EINVAL;
4217                 if (!key.p.key || !key.p.key_len)
4218                         return -EINVAL;
4219                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4220                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4221                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4222                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4223                         return -EINVAL;
4224                 if (key.idx > 4)
4225                         return -EINVAL;
4226         } else {
4227                 key.p.key_len = 0;
4228                 key.p.key = NULL;
4229         }
4230
4231         if (key.idx >= 0) {
4232                 int i;
4233                 bool ok = false;
4234                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4235                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4236                                 ok = true;
4237                                 break;
4238                         }
4239                 }
4240                 if (!ok)
4241                         return -EINVAL;
4242         }
4243
4244         if (!rdev->ops->auth)
4245                 return -EOPNOTSUPP;
4246
4247         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4248             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4249                 return -EOPNOTSUPP;
4250
4251         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4252         chan = ieee80211_get_channel(&rdev->wiphy,
4253                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4254         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4255                 return -EINVAL;
4256
4257         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4258         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4259
4260         if (info->attrs[NL80211_ATTR_IE]) {
4261                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4262                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4263         }
4264
4265         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4266         if (!nl80211_valid_auth_type(auth_type))
4267                 return -EINVAL;
4268
4269         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4270
4271         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4272                                   ssid, ssid_len, ie, ie_len,
4273                                   key.p.key, key.p.key_len, key.idx,
4274                                   local_state_change);
4275 }
4276
4277 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4278                                    struct genl_info *info,
4279                                    struct cfg80211_crypto_settings *settings,
4280                                    int cipher_limit)
4281 {
4282         memset(settings, 0, sizeof(*settings));
4283
4284         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4285
4286         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4287                 u16 proto;
4288                 proto = nla_get_u16(
4289                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4290                 settings->control_port_ethertype = cpu_to_be16(proto);
4291                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4292                     proto != ETH_P_PAE)
4293                         return -EINVAL;
4294                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4295                         settings->control_port_no_encrypt = true;
4296         } else
4297                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4298
4299         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4300                 void *data;
4301                 int len, i;
4302
4303                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4304                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4305                 settings->n_ciphers_pairwise = len / sizeof(u32);
4306
4307                 if (len % sizeof(u32))
4308                         return -EINVAL;
4309
4310                 if (settings->n_ciphers_pairwise > cipher_limit)
4311                         return -EINVAL;
4312
4313                 memcpy(settings->ciphers_pairwise, data, len);
4314
4315                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4316                         if (!cfg80211_supported_cipher_suite(
4317                                         &rdev->wiphy,
4318                                         settings->ciphers_pairwise[i]))
4319                                 return -EINVAL;
4320         }
4321
4322         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4323                 settings->cipher_group =
4324                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4325                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4326                                                      settings->cipher_group))
4327                         return -EINVAL;
4328         }
4329
4330         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4331                 settings->wpa_versions =
4332                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4333                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4334                         return -EINVAL;
4335         }
4336
4337         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4338                 void *data;
4339                 int len;
4340
4341                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4342                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4343                 settings->n_akm_suites = len / sizeof(u32);
4344
4345                 if (len % sizeof(u32))
4346                         return -EINVAL;
4347
4348                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4349                         return -EINVAL;
4350
4351                 memcpy(settings->akm_suites, data, len);
4352         }
4353
4354         return 0;
4355 }
4356
4357 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4358 {
4359         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4360         struct net_device *dev = info->user_ptr[1];
4361         struct cfg80211_crypto_settings crypto;
4362         struct ieee80211_channel *chan;
4363         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4364         int err, ssid_len, ie_len = 0;
4365         bool use_mfp = false;
4366
4367         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4368                 return -EINVAL;
4369
4370         if (!info->attrs[NL80211_ATTR_MAC] ||
4371             !info->attrs[NL80211_ATTR_SSID] ||
4372             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4373                 return -EINVAL;
4374
4375         if (!rdev->ops->assoc)
4376                 return -EOPNOTSUPP;
4377
4378         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4379             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4380                 return -EOPNOTSUPP;
4381
4382         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4383
4384         chan = ieee80211_get_channel(&rdev->wiphy,
4385                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4386         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4387                 return -EINVAL;
4388
4389         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4390         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4391
4392         if (info->attrs[NL80211_ATTR_IE]) {
4393                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4394                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4395         }
4396
4397         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4398                 enum nl80211_mfp mfp =
4399                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4400                 if (mfp == NL80211_MFP_REQUIRED)
4401                         use_mfp = true;
4402                 else if (mfp != NL80211_MFP_NO)
4403                         return -EINVAL;
4404         }
4405
4406         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4407                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4408
4409         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4410         if (!err)
4411                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4412                                           ssid, ssid_len, ie, ie_len, use_mfp,
4413                                           &crypto);
4414
4415         return err;
4416 }
4417
4418 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4419 {
4420         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4421         struct net_device *dev = info->user_ptr[1];
4422         const u8 *ie = NULL, *bssid;
4423         int ie_len = 0;
4424         u16 reason_code;
4425         bool local_state_change;
4426
4427         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4428                 return -EINVAL;
4429
4430         if (!info->attrs[NL80211_ATTR_MAC])
4431                 return -EINVAL;
4432
4433         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4434                 return -EINVAL;
4435
4436         if (!rdev->ops->deauth)
4437                 return -EOPNOTSUPP;
4438
4439         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4440             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4441                 return -EOPNOTSUPP;
4442
4443         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4444
4445         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4446         if (reason_code == 0) {
4447                 /* Reason Code 0 is reserved */
4448                 return -EINVAL;
4449         }
4450
4451         if (info->attrs[NL80211_ATTR_IE]) {
4452                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4453                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4454         }
4455
4456         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4457
4458         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
4459                                     local_state_change);
4460 }
4461
4462 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
4463 {
4464         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4465         struct net_device *dev = info->user_ptr[1];
4466         const u8 *ie = NULL, *bssid;
4467         int ie_len = 0;
4468         u16 reason_code;
4469         bool local_state_change;
4470
4471         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4472                 return -EINVAL;
4473
4474         if (!info->attrs[NL80211_ATTR_MAC])
4475                 return -EINVAL;
4476
4477         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4478                 return -EINVAL;
4479
4480         if (!rdev->ops->disassoc)
4481                 return -EOPNOTSUPP;
4482
4483         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4484             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4485                 return -EOPNOTSUPP;
4486
4487         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4488
4489         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4490         if (reason_code == 0) {
4491                 /* Reason Code 0 is reserved */
4492                 return -EINVAL;
4493         }
4494
4495         if (info->attrs[NL80211_ATTR_IE]) {
4496                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4497                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4498         }
4499
4500         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4501
4502         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
4503                                       local_state_change);
4504 }
4505
4506 static bool
4507 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
4508                          int mcast_rate[IEEE80211_NUM_BANDS],
4509                          int rateval)
4510 {
4511         struct wiphy *wiphy = &rdev->wiphy;
4512         bool found = false;
4513         int band, i;
4514
4515         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4516                 struct ieee80211_supported_band *sband;
4517
4518                 sband = wiphy->bands[band];
4519                 if (!sband)
4520                         continue;
4521
4522                 for (i = 0; i < sband->n_bitrates; i++) {
4523                         if (sband->bitrates[i].bitrate == rateval) {
4524                                 mcast_rate[band] = i + 1;
4525                                 found = true;
4526                                 break;
4527                         }
4528                 }
4529         }
4530
4531         return found;
4532 }
4533
4534 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
4535 {
4536         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4537         struct net_device *dev = info->user_ptr[1];
4538         struct cfg80211_ibss_params ibss;
4539         struct wiphy *wiphy;
4540         struct cfg80211_cached_keys *connkeys = NULL;
4541         int err;
4542
4543         memset(&ibss, 0, sizeof(ibss));
4544
4545         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4546                 return -EINVAL;
4547
4548         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
4549             !info->attrs[NL80211_ATTR_SSID] ||
4550             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4551                 return -EINVAL;
4552
4553         ibss.beacon_interval = 100;
4554
4555         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
4556                 ibss.beacon_interval =
4557                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
4558                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
4559                         return -EINVAL;
4560         }
4561
4562         if (!rdev->ops->join_ibss)
4563                 return -EOPNOTSUPP;
4564
4565         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4566                 return -EOPNOTSUPP;
4567
4568         wiphy = &rdev->wiphy;
4569
4570         if (info->attrs[NL80211_ATTR_MAC]) {
4571                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4572
4573                 if (!is_valid_ether_addr(ibss.bssid))
4574                         return -EINVAL;
4575         }
4576         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4577         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4578
4579         if (info->attrs[NL80211_ATTR_IE]) {
4580                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4581                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4582         }
4583
4584         ibss.channel = ieee80211_get_channel(wiphy,
4585                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4586         if (!ibss.channel ||
4587             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
4588             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
4589                 return -EINVAL;
4590
4591         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
4592         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
4593
4594         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
4595                 u8 *rates =
4596                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4597                 int n_rates =
4598                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
4599                 struct ieee80211_supported_band *sband =
4600                         wiphy->bands[ibss.channel->band];
4601                 int err;
4602
4603                 err = ieee80211_get_ratemask(sband, rates, n_rates,
4604                                              &ibss.basic_rates);
4605                 if (err)
4606                         return err;
4607         }
4608
4609         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
4610             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
4611                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
4612                 return -EINVAL;
4613
4614         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4615                 connkeys = nl80211_parse_connkeys(rdev,
4616                                         info->attrs[NL80211_ATTR_KEYS]);
4617                 if (IS_ERR(connkeys))
4618                         return PTR_ERR(connkeys);
4619         }
4620
4621         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
4622         if (err)
4623                 kfree(connkeys);
4624         return err;
4625 }
4626
4627 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
4628 {
4629         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4630         struct net_device *dev = info->user_ptr[1];
4631
4632         if (!rdev->ops->leave_ibss)
4633                 return -EOPNOTSUPP;
4634
4635         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
4636                 return -EOPNOTSUPP;
4637
4638         return cfg80211_leave_ibss(rdev, dev, false);
4639 }
4640
4641 #ifdef CONFIG_NL80211_TESTMODE
4642 static struct genl_multicast_group nl80211_testmode_mcgrp = {
4643         .name = "testmode",
4644 };
4645
4646 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
4647 {
4648         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4649         int err;
4650
4651         if (!info->attrs[NL80211_ATTR_TESTDATA])
4652                 return -EINVAL;
4653
4654         err = -EOPNOTSUPP;
4655         if (rdev->ops->testmode_cmd) {
4656                 rdev->testmode_info = info;
4657                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
4658                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
4659                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
4660                 rdev->testmode_info = NULL;
4661         }
4662
4663         return err;
4664 }
4665
4666 static int nl80211_testmode_dump(struct sk_buff *skb,
4667                                  struct netlink_callback *cb)
4668 {
4669         struct cfg80211_registered_device *dev;
4670         int err;
4671         long phy_idx;
4672         void *data = NULL;
4673         int data_len = 0;
4674
4675         if (cb->args[0]) {
4676                 /*
4677                  * 0 is a valid index, but not valid for args[0],
4678                  * so we need to offset by 1.
4679                  */
4680                 phy_idx = cb->args[0] - 1;
4681         } else {
4682                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
4683                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
4684                                   nl80211_policy);
4685                 if (err)
4686                         return err;
4687                 if (!nl80211_fam.attrbuf[NL80211_ATTR_WIPHY])
4688                         return -EINVAL;
4689                 phy_idx = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
4690                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
4691                         cb->args[1] =
4692                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
4693         }
4694
4695         if (cb->args[1]) {
4696                 data = nla_data((void *)cb->args[1]);
4697                 data_len = nla_len((void *)cb->args[1]);
4698         }
4699
4700         mutex_lock(&cfg80211_mutex);
4701         dev = cfg80211_rdev_by_wiphy_idx(phy_idx);
4702         if (!dev) {
4703                 mutex_unlock(&cfg80211_mutex);
4704                 return -ENOENT;
4705         }
4706         cfg80211_lock_rdev(dev);
4707         mutex_unlock(&cfg80211_mutex);
4708
4709         if (!dev->ops->testmode_dump) {
4710                 err = -EOPNOTSUPP;
4711                 goto out_err;
4712         }
4713
4714         while (1) {
4715                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
4716                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
4717                                            NL80211_CMD_TESTMODE);
4718                 struct nlattr *tmdata;
4719
4720                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, dev->wiphy_idx) < 0) {
4721                         genlmsg_cancel(skb, hdr);
4722                         break;
4723                 }
4724
4725                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4726                 if (!tmdata) {
4727                         genlmsg_cancel(skb, hdr);
4728                         break;
4729                 }
4730                 err = dev->ops->testmode_dump(&dev->wiphy, skb, cb,
4731                                               data, data_len);
4732                 nla_nest_end(skb, tmdata);
4733
4734                 if (err == -ENOBUFS || err == -ENOENT) {
4735                         genlmsg_cancel(skb, hdr);
4736                         break;
4737                 } else if (err) {
4738                         genlmsg_cancel(skb, hdr);
4739                         goto out_err;
4740                 }
4741
4742                 genlmsg_end(skb, hdr);
4743         }
4744
4745         err = skb->len;
4746         /* see above */
4747         cb->args[0] = phy_idx + 1;
4748  out_err:
4749         cfg80211_unlock_rdev(dev);
4750         return err;
4751 }
4752
4753 static struct sk_buff *
4754 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
4755                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
4756 {
4757         struct sk_buff *skb;
4758         void *hdr;
4759         struct nlattr *data;
4760
4761         skb = nlmsg_new(approxlen + 100, gfp);
4762         if (!skb)
4763                 return NULL;
4764
4765         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
4766         if (!hdr) {
4767                 kfree_skb(skb);
4768                 return NULL;
4769         }
4770
4771         NLA_PUT_U32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
4772         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
4773
4774         ((void **)skb->cb)[0] = rdev;
4775         ((void **)skb->cb)[1] = hdr;
4776         ((void **)skb->cb)[2] = data;
4777
4778         return skb;
4779
4780  nla_put_failure:
4781         kfree_skb(skb);
4782         return NULL;
4783 }
4784
4785 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
4786                                                   int approxlen)
4787 {
4788         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4789
4790         if (WARN_ON(!rdev->testmode_info))
4791                 return NULL;
4792
4793         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
4794                                 rdev->testmode_info->snd_pid,
4795                                 rdev->testmode_info->snd_seq,
4796                                 GFP_KERNEL);
4797 }
4798 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
4799
4800 int cfg80211_testmode_reply(struct sk_buff *skb)
4801 {
4802         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4803         void *hdr = ((void **)skb->cb)[1];
4804         struct nlattr *data = ((void **)skb->cb)[2];
4805
4806         /* clear CB data for netlink core to own from now on */
4807         memset(skb->cb, 0, sizeof(skb->cb));
4808
4809         if (WARN_ON(!rdev->testmode_info)) {
4810                 kfree_skb(skb);
4811                 return -EINVAL;
4812         }
4813
4814         nla_nest_end(skb, data);
4815         genlmsg_end(skb, hdr);
4816         return genlmsg_reply(skb, rdev->testmode_info);
4817 }
4818 EXPORT_SYMBOL(cfg80211_testmode_reply);
4819
4820 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
4821                                                   int approxlen, gfp_t gfp)
4822 {
4823         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
4824
4825         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
4826 }
4827 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
4828
4829 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
4830 {
4831         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
4832         void *hdr = ((void **)skb->cb)[1];
4833         struct nlattr *data = ((void **)skb->cb)[2];
4834
4835         /* clear CB data for netlink core to own from now on */
4836         memset(skb->cb, 0, sizeof(skb->cb));
4837
4838         nla_nest_end(skb, data);
4839         genlmsg_end(skb, hdr);
4840         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), skb, 0,
4841                                 nl80211_testmode_mcgrp.id, gfp);
4842 }
4843 EXPORT_SYMBOL(cfg80211_testmode_event);
4844 #endif
4845
4846 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
4847 {
4848         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4849         struct net_device *dev = info->user_ptr[1];
4850         struct cfg80211_connect_params connect;
4851         struct wiphy *wiphy;
4852         struct cfg80211_cached_keys *connkeys = NULL;
4853         int err;
4854
4855         memset(&connect, 0, sizeof(connect));
4856
4857         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4858                 return -EINVAL;
4859
4860         if (!info->attrs[NL80211_ATTR_SSID] ||
4861             !nla_len(info->attrs[NL80211_ATTR_SSID]))
4862                 return -EINVAL;
4863
4864         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
4865                 connect.auth_type =
4866                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4867                 if (!nl80211_valid_auth_type(connect.auth_type))
4868                         return -EINVAL;
4869         } else
4870                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
4871
4872         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
4873
4874         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
4875                                       NL80211_MAX_NR_CIPHER_SUITES);
4876         if (err)
4877                 return err;
4878
4879         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4880             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4881                 return -EOPNOTSUPP;
4882
4883         wiphy = &rdev->wiphy;
4884
4885         if (info->attrs[NL80211_ATTR_MAC])
4886                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4887         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4888         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4889
4890         if (info->attrs[NL80211_ATTR_IE]) {
4891                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4892                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4893         }
4894
4895         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
4896                 connect.channel =
4897                         ieee80211_get_channel(wiphy,
4898                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4899                 if (!connect.channel ||
4900                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
4901                         return -EINVAL;
4902         }
4903
4904         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
4905                 connkeys = nl80211_parse_connkeys(rdev,
4906                                         info->attrs[NL80211_ATTR_KEYS]);
4907                 if (IS_ERR(connkeys))
4908                         return PTR_ERR(connkeys);
4909         }
4910
4911         err = cfg80211_connect(rdev, dev, &connect, connkeys);
4912         if (err)
4913                 kfree(connkeys);
4914         return err;
4915 }
4916
4917 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
4918 {
4919         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4920         struct net_device *dev = info->user_ptr[1];
4921         u16 reason;
4922
4923         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4924                 reason = WLAN_REASON_DEAUTH_LEAVING;
4925         else
4926                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
4927
4928         if (reason == 0)
4929                 return -EINVAL;
4930
4931         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4932             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4933                 return -EOPNOTSUPP;
4934
4935         return cfg80211_disconnect(rdev, dev, reason, true);
4936 }
4937
4938 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
4939 {
4940         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4941         struct net *net;
4942         int err;
4943         u32 pid;
4944
4945         if (!info->attrs[NL80211_ATTR_PID])
4946                 return -EINVAL;
4947
4948         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
4949
4950         net = get_net_ns_by_pid(pid);
4951         if (IS_ERR(net))
4952                 return PTR_ERR(net);
4953
4954         err = 0;
4955
4956         /* check if anything to do */
4957         if (!net_eq(wiphy_net(&rdev->wiphy), net))
4958                 err = cfg80211_switch_netns(rdev, net);
4959
4960         put_net(net);
4961         return err;
4962 }
4963
4964 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
4965 {
4966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4967         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
4968                         struct cfg80211_pmksa *pmksa) = NULL;
4969         struct net_device *dev = info->user_ptr[1];
4970         struct cfg80211_pmksa pmksa;
4971
4972         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
4973
4974         if (!info->attrs[NL80211_ATTR_MAC])
4975                 return -EINVAL;
4976
4977         if (!info->attrs[NL80211_ATTR_PMKID])
4978                 return -EINVAL;
4979
4980         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
4981         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4982
4983         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4984             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4985                 return -EOPNOTSUPP;
4986
4987         switch (info->genlhdr->cmd) {
4988         case NL80211_CMD_SET_PMKSA:
4989                 rdev_ops = rdev->ops->set_pmksa;
4990                 break;
4991         case NL80211_CMD_DEL_PMKSA:
4992                 rdev_ops = rdev->ops->del_pmksa;
4993                 break;
4994         default:
4995                 WARN_ON(1);
4996                 break;
4997         }
4998
4999         if (!rdev_ops)
5000                 return -EOPNOTSUPP;
5001
5002         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5003 }
5004
5005 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5006 {
5007         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5008         struct net_device *dev = info->user_ptr[1];
5009
5010         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5011             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5012                 return -EOPNOTSUPP;
5013
5014         if (!rdev->ops->flush_pmksa)
5015                 return -EOPNOTSUPP;
5016
5017         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5018 }
5019
5020 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5021 {
5022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5023         struct net_device *dev = info->user_ptr[1];
5024         u8 action_code, dialog_token;
5025         u16 status_code;
5026         u8 *peer;
5027
5028         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5029             !rdev->ops->tdls_mgmt)
5030                 return -EOPNOTSUPP;
5031
5032         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5033             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5034             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5035             !info->attrs[NL80211_ATTR_IE] ||
5036             !info->attrs[NL80211_ATTR_MAC])
5037                 return -EINVAL;
5038
5039         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5040         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5041         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5042         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5043
5044         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5045                                     dialog_token, status_code,
5046                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5047                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5048 }
5049
5050 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5051 {
5052         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5053         struct net_device *dev = info->user_ptr[1];
5054         enum nl80211_tdls_operation operation;
5055         u8 *peer;
5056
5057         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5058             !rdev->ops->tdls_oper)
5059                 return -EOPNOTSUPP;
5060
5061         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5062             !info->attrs[NL80211_ATTR_MAC])
5063                 return -EINVAL;
5064
5065         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5066         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5067
5068         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5069 }
5070
5071 static int nl80211_remain_on_channel(struct sk_buff *skb,
5072                                      struct genl_info *info)
5073 {
5074         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5075         struct net_device *dev = info->user_ptr[1];
5076         struct ieee80211_channel *chan;
5077         struct sk_buff *msg;
5078         void *hdr;
5079         u64 cookie;
5080         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5081         u32 freq, duration;
5082         int err;
5083
5084         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5085             !info->attrs[NL80211_ATTR_DURATION])
5086                 return -EINVAL;
5087
5088         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5089
5090         /*
5091          * We should be on that channel for at least one jiffie,
5092          * and more than 5 seconds seems excessive.
5093          */
5094         if (!duration || !msecs_to_jiffies(duration) ||
5095             duration > rdev->wiphy.max_remain_on_channel_duration)
5096                 return -EINVAL;
5097
5098         if (!rdev->ops->remain_on_channel)
5099                 return -EOPNOTSUPP;
5100
5101         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5102                 channel_type = nla_get_u32(
5103                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5104                 if (channel_type != NL80211_CHAN_NO_HT &&
5105                     channel_type != NL80211_CHAN_HT20 &&
5106                     channel_type != NL80211_CHAN_HT40PLUS &&
5107                     channel_type != NL80211_CHAN_HT40MINUS)
5108                         return -EINVAL;
5109         }
5110
5111         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5112         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5113         if (chan == NULL)
5114                 return -EINVAL;
5115
5116         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5117         if (!msg)
5118                 return -ENOMEM;
5119
5120         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5121                              NL80211_CMD_REMAIN_ON_CHANNEL);
5122
5123         if (IS_ERR(hdr)) {
5124                 err = PTR_ERR(hdr);
5125                 goto free_msg;
5126         }
5127
5128         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5129                                            channel_type, duration, &cookie);
5130
5131         if (err)
5132                 goto free_msg;
5133
5134         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5135
5136         genlmsg_end(msg, hdr);
5137
5138         return genlmsg_reply(msg, info);
5139
5140  nla_put_failure:
5141         err = -ENOBUFS;
5142  free_msg:
5143         nlmsg_free(msg);
5144         return err;
5145 }
5146
5147 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5148                                             struct genl_info *info)
5149 {
5150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5151         struct net_device *dev = info->user_ptr[1];
5152         u64 cookie;
5153
5154         if (!info->attrs[NL80211_ATTR_COOKIE])
5155                 return -EINVAL;
5156
5157         if (!rdev->ops->cancel_remain_on_channel)
5158                 return -EOPNOTSUPP;
5159
5160         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5161
5162         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5163 }
5164
5165 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5166                            u8 *rates, u8 rates_len)
5167 {
5168         u8 i;
5169         u32 mask = 0;
5170
5171         for (i = 0; i < rates_len; i++) {
5172                 int rate = (rates[i] & 0x7f) * 5;
5173                 int ridx;
5174                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5175                         struct ieee80211_rate *srate =
5176                                 &sband->bitrates[ridx];
5177                         if (rate == srate->bitrate) {
5178                                 mask |= 1 << ridx;
5179                                 break;
5180                         }
5181                 }
5182                 if (ridx == sband->n_bitrates)
5183                         return 0; /* rate not found */
5184         }
5185
5186         return mask;
5187 }
5188
5189 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5190         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5191                                     .len = NL80211_MAX_SUPP_RATES },
5192 };
5193
5194 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5195                                        struct genl_info *info)
5196 {
5197         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5198         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5199         struct cfg80211_bitrate_mask mask;
5200         int rem, i;
5201         struct net_device *dev = info->user_ptr[1];
5202         struct nlattr *tx_rates;
5203         struct ieee80211_supported_band *sband;
5204
5205         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5206                 return -EINVAL;
5207
5208         if (!rdev->ops->set_bitrate_mask)
5209                 return -EOPNOTSUPP;
5210
5211         memset(&mask, 0, sizeof(mask));
5212         /* Default to all rates enabled */
5213         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5214                 sband = rdev->wiphy.bands[i];
5215                 mask.control[i].legacy =
5216                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5217         }
5218
5219         /*
5220          * The nested attribute uses enum nl80211_band as the index. This maps
5221          * directly to the enum ieee80211_band values used in cfg80211.
5222          */
5223         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5224         {
5225                 enum ieee80211_band band = nla_type(tx_rates);
5226                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5227                         return -EINVAL;
5228                 sband = rdev->wiphy.bands[band];
5229                 if (sband == NULL)
5230                         return -EINVAL;
5231                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5232                           nla_len(tx_rates), nl80211_txattr_policy);
5233                 if (tb[NL80211_TXRATE_LEGACY]) {
5234                         mask.control[band].legacy = rateset_to_mask(
5235                                 sband,
5236                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5237                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5238                         if (mask.control[band].legacy == 0)
5239                                 return -EINVAL;
5240                 }
5241         }
5242
5243         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5244 }
5245
5246 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5247 {
5248         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5249         struct net_device *dev = info->user_ptr[1];
5250         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5251
5252         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5253                 return -EINVAL;
5254
5255         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5256                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5257
5258         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5259             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5260             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5261             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5262             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5263             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5264             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5265                 return -EOPNOTSUPP;
5266
5267         /* not much point in registering if we can't reply */
5268         if (!rdev->ops->mgmt_tx)
5269                 return -EOPNOTSUPP;
5270
5271         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5272                         frame_type,
5273                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5274                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5275 }
5276
5277 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5278 {
5279         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5280         struct net_device *dev = info->user_ptr[1];
5281         struct ieee80211_channel *chan;
5282         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5283         bool channel_type_valid = false;
5284         u32 freq;
5285         int err;
5286         void *hdr;
5287         u64 cookie;
5288         struct sk_buff *msg;
5289         unsigned int wait = 0;
5290         bool offchan;
5291         bool no_cck;
5292
5293         if (!info->attrs[NL80211_ATTR_FRAME] ||
5294             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5295                 return -EINVAL;
5296
5297         if (!rdev->ops->mgmt_tx)
5298                 return -EOPNOTSUPP;
5299
5300         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5301             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5303             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5304             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5305             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5306             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5307                 return -EOPNOTSUPP;
5308
5309         if (info->attrs[NL80211_ATTR_DURATION]) {
5310                 if (!rdev->ops->mgmt_tx_cancel_wait)
5311                         return -EINVAL;
5312                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5313         }
5314
5315         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5316                 channel_type = nla_get_u32(
5317                         info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
5318                 if (channel_type != NL80211_CHAN_NO_HT &&
5319                     channel_type != NL80211_CHAN_HT20 &&
5320                     channel_type != NL80211_CHAN_HT40PLUS &&
5321                     channel_type != NL80211_CHAN_HT40MINUS)
5322                         return -EINVAL;
5323                 channel_type_valid = true;
5324         }
5325
5326         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
5327
5328         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
5329
5330         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5331         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5332         if (chan == NULL)
5333                 return -EINVAL;
5334
5335         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5336         if (!msg)
5337                 return -ENOMEM;
5338
5339         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5340                              NL80211_CMD_FRAME);
5341
5342         if (IS_ERR(hdr)) {
5343                 err = PTR_ERR(hdr);
5344                 goto free_msg;
5345         }
5346         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
5347                                     channel_type_valid, wait,
5348                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
5349                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
5350                                     no_cck, &cookie);
5351         if (err)
5352                 goto free_msg;
5353
5354         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
5355
5356         genlmsg_end(msg, hdr);
5357         return genlmsg_reply(msg, info);
5358
5359  nla_put_failure:
5360         err = -ENOBUFS;
5361  free_msg:
5362         nlmsg_free(msg);
5363         return err;
5364 }
5365
5366 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
5367 {
5368         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5369         struct net_device *dev = info->user_ptr[1];
5370         u64 cookie;
5371
5372         if (!info->attrs[NL80211_ATTR_COOKIE])
5373                 return -EINVAL;
5374
5375         if (!rdev->ops->mgmt_tx_cancel_wait)
5376                 return -EOPNOTSUPP;
5377
5378         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5379             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5380             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5381             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5382             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5383             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5384                 return -EOPNOTSUPP;
5385
5386         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5387
5388         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
5389 }
5390
5391 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
5392 {
5393         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5394         struct wireless_dev *wdev;
5395         struct net_device *dev = info->user_ptr[1];
5396         u8 ps_state;
5397         bool state;
5398         int err;
5399
5400         if (!info->attrs[NL80211_ATTR_PS_STATE])
5401                 return -EINVAL;
5402
5403         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
5404
5405         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
5406                 return -EINVAL;
5407
5408         wdev = dev->ieee80211_ptr;
5409
5410         if (!rdev->ops->set_power_mgmt)
5411                 return -EOPNOTSUPP;
5412
5413         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
5414
5415         if (state == wdev->ps)
5416                 return 0;
5417
5418         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
5419                                         wdev->ps_timeout);
5420         if (!err)
5421                 wdev->ps = state;
5422         return err;
5423 }
5424
5425 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
5426 {
5427         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5428         enum nl80211_ps_state ps_state;
5429         struct wireless_dev *wdev;
5430         struct net_device *dev = info->user_ptr[1];
5431         struct sk_buff *msg;
5432         void *hdr;
5433         int err;
5434
5435         wdev = dev->ieee80211_ptr;
5436
5437         if (!rdev->ops->set_power_mgmt)
5438                 return -EOPNOTSUPP;
5439
5440         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5441         if (!msg)
5442                 return -ENOMEM;
5443
5444         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5445                              NL80211_CMD_GET_POWER_SAVE);
5446         if (!hdr) {
5447                 err = -ENOBUFS;
5448                 goto free_msg;
5449         }
5450
5451         if (wdev->ps)
5452                 ps_state = NL80211_PS_ENABLED;
5453         else
5454                 ps_state = NL80211_PS_DISABLED;
5455
5456         NLA_PUT_U32(msg, NL80211_ATTR_PS_STATE, ps_state);
5457
5458         genlmsg_end(msg, hdr);
5459         return genlmsg_reply(msg, info);
5460
5461  nla_put_failure:
5462         err = -ENOBUFS;
5463  free_msg:
5464         nlmsg_free(msg);
5465         return err;
5466 }
5467
5468 static struct nla_policy
5469 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
5470         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
5471         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
5472         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
5473 };
5474
5475 static int nl80211_set_cqm_rssi(struct genl_info *info,
5476                                 s32 threshold, u32 hysteresis)
5477 {
5478         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5479         struct wireless_dev *wdev;
5480         struct net_device *dev = info->user_ptr[1];
5481
5482         if (threshold > 0)
5483                 return -EINVAL;
5484
5485         wdev = dev->ieee80211_ptr;
5486
5487         if (!rdev->ops->set_cqm_rssi_config)
5488                 return -EOPNOTSUPP;
5489
5490         if (wdev->iftype != NL80211_IFTYPE_STATION &&
5491             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
5492                 return -EOPNOTSUPP;
5493
5494         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
5495                                               threshold, hysteresis);
5496 }
5497
5498 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
5499 {
5500         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
5501         struct nlattr *cqm;
5502         int err;
5503
5504         cqm = info->attrs[NL80211_ATTR_CQM];
5505         if (!cqm) {
5506                 err = -EINVAL;
5507                 goto out;
5508         }
5509
5510         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
5511                                nl80211_attr_cqm_policy);
5512         if (err)
5513                 goto out;
5514
5515         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
5516             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
5517                 s32 threshold;
5518                 u32 hysteresis;
5519                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
5520                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
5521                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
5522         } else
5523                 err = -EINVAL;
5524
5525 out:
5526         return err;
5527 }
5528
5529 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
5530 {
5531         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5532         struct net_device *dev = info->user_ptr[1];
5533         struct mesh_config cfg;
5534         struct mesh_setup setup;
5535         int err;
5536
5537         /* start with default */
5538         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
5539         memcpy(&setup, &default_mesh_setup, sizeof(setup));
5540
5541         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
5542                 /* and parse parameters if given */
5543                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
5544                 if (err)
5545                         return err;
5546         }
5547
5548         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
5549             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
5550                 return -EINVAL;
5551
5552         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
5553         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
5554
5555         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
5556                 /* parse additional setup parameters if given */
5557                 err = nl80211_parse_mesh_setup(info, &setup);
5558                 if (err)
5559                         return err;
5560         }
5561
5562         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
5563 }
5564
5565 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
5566 {
5567         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5568         struct net_device *dev = info->user_ptr[1];
5569
5570         return cfg80211_leave_mesh(rdev, dev);
5571 }
5572
5573 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
5574 {
5575         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5576         struct sk_buff *msg;
5577         void *hdr;
5578
5579         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5580                 return -EOPNOTSUPP;
5581
5582         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5583         if (!msg)
5584                 return -ENOMEM;
5585
5586         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5587                              NL80211_CMD_GET_WOWLAN);
5588         if (!hdr)
5589                 goto nla_put_failure;
5590
5591         if (rdev->wowlan) {
5592                 struct nlattr *nl_wowlan;
5593
5594                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
5595                 if (!nl_wowlan)
5596                         goto nla_put_failure;
5597
5598                 if (rdev->wowlan->any)
5599                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
5600                 if (rdev->wowlan->disconnect)
5601                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
5602                 if (rdev->wowlan->magic_pkt)
5603                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
5604                 if (rdev->wowlan->gtk_rekey_failure)
5605                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE);
5606                 if (rdev->wowlan->eap_identity_req)
5607                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST);
5608                 if (rdev->wowlan->four_way_handshake)
5609                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE);
5610                 if (rdev->wowlan->rfkill_release)
5611                         NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE);
5612                 if (rdev->wowlan->n_patterns) {
5613                         struct nlattr *nl_pats, *nl_pat;
5614                         int i, pat_len;
5615
5616                         nl_pats = nla_nest_start(msg,
5617                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
5618                         if (!nl_pats)
5619                                 goto nla_put_failure;
5620
5621                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
5622                                 nl_pat = nla_nest_start(msg, i + 1);
5623                                 if (!nl_pat)
5624                                         goto nla_put_failure;
5625                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
5626                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_MASK,
5627                                         DIV_ROUND_UP(pat_len, 8),
5628                                         rdev->wowlan->patterns[i].mask);
5629                                 NLA_PUT(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
5630                                         pat_len,
5631                                         rdev->wowlan->patterns[i].pattern);
5632                                 nla_nest_end(msg, nl_pat);
5633                         }
5634                         nla_nest_end(msg, nl_pats);
5635                 }
5636
5637                 nla_nest_end(msg, nl_wowlan);
5638         }
5639
5640         genlmsg_end(msg, hdr);
5641         return genlmsg_reply(msg, info);
5642
5643 nla_put_failure:
5644         nlmsg_free(msg);
5645         return -ENOBUFS;
5646 }
5647
5648 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
5649 {
5650         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5651         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
5652         struct cfg80211_wowlan no_triggers = {};
5653         struct cfg80211_wowlan new_triggers = {};
5654         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
5655         int err, i;
5656
5657         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
5658                 return -EOPNOTSUPP;
5659
5660         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
5661                 goto no_triggers;
5662
5663         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
5664                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5665                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
5666                         nl80211_wowlan_policy);
5667         if (err)
5668                 return err;
5669
5670         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
5671                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
5672                         return -EINVAL;
5673                 new_triggers.any = true;
5674         }
5675
5676         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
5677                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
5678                         return -EINVAL;
5679                 new_triggers.disconnect = true;
5680         }
5681
5682         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
5683                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
5684                         return -EINVAL;
5685                 new_triggers.magic_pkt = true;
5686         }
5687
5688         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
5689                 return -EINVAL;
5690
5691         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
5692                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
5693                         return -EINVAL;
5694                 new_triggers.gtk_rekey_failure = true;
5695         }
5696
5697         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
5698                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
5699                         return -EINVAL;
5700                 new_triggers.eap_identity_req = true;
5701         }
5702
5703         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
5704                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
5705                         return -EINVAL;
5706                 new_triggers.four_way_handshake = true;
5707         }
5708
5709         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
5710                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
5711                         return -EINVAL;
5712                 new_triggers.rfkill_release = true;
5713         }
5714
5715         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
5716                 struct nlattr *pat;
5717                 int n_patterns = 0;
5718                 int rem, pat_len, mask_len;
5719                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
5720
5721                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5722                                     rem)
5723                         n_patterns++;
5724                 if (n_patterns > wowlan->n_patterns)
5725                         return -EINVAL;
5726
5727                 new_triggers.patterns = kcalloc(n_patterns,
5728                                                 sizeof(new_triggers.patterns[0]),
5729                                                 GFP_KERNEL);
5730                 if (!new_triggers.patterns)
5731                         return -ENOMEM;
5732
5733                 new_triggers.n_patterns = n_patterns;
5734                 i = 0;
5735
5736                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
5737                                     rem) {
5738                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
5739                                   nla_data(pat), nla_len(pat), NULL);
5740                         err = -EINVAL;
5741                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
5742                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
5743                                 goto error;
5744                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
5745                         mask_len = DIV_ROUND_UP(pat_len, 8);
5746                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
5747                             mask_len)
5748                                 goto error;
5749                         if (pat_len > wowlan->pattern_max_len ||
5750                             pat_len < wowlan->pattern_min_len)
5751                                 goto error;
5752
5753                         new_triggers.patterns[i].mask =
5754                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
5755                         if (!new_triggers.patterns[i].mask) {
5756                                 err = -ENOMEM;
5757                                 goto error;
5758                         }
5759                         new_triggers.patterns[i].pattern =
5760                                 new_triggers.patterns[i].mask + mask_len;
5761                         memcpy(new_triggers.patterns[i].mask,
5762                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
5763                                mask_len);
5764                         new_triggers.patterns[i].pattern_len = pat_len;
5765                         memcpy(new_triggers.patterns[i].pattern,
5766                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
5767                                pat_len);
5768                         i++;
5769                 }
5770         }
5771
5772         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
5773                 struct cfg80211_wowlan *ntrig;
5774                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
5775                                 GFP_KERNEL);
5776                 if (!ntrig) {
5777                         err = -ENOMEM;
5778                         goto error;
5779                 }
5780                 cfg80211_rdev_free_wowlan(rdev);
5781                 rdev->wowlan = ntrig;
5782         } else {
5783  no_triggers:
5784                 cfg80211_rdev_free_wowlan(rdev);
5785                 rdev->wowlan = NULL;
5786         }
5787
5788         return 0;
5789  error:
5790         for (i = 0; i < new_triggers.n_patterns; i++)
5791                 kfree(new_triggers.patterns[i].mask);
5792         kfree(new_triggers.patterns);
5793         return err;
5794 }
5795
5796 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
5797 {
5798         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5799         struct net_device *dev = info->user_ptr[1];
5800         struct wireless_dev *wdev = dev->ieee80211_ptr;
5801         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
5802         struct cfg80211_gtk_rekey_data rekey_data;
5803         int err;
5804
5805         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
5806                 return -EINVAL;
5807
5808         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
5809                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
5810                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
5811                         nl80211_rekey_policy);
5812         if (err)
5813                 return err;
5814
5815         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
5816                 return -ERANGE;
5817         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
5818                 return -ERANGE;
5819         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
5820                 return -ERANGE;
5821
5822         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
5823                NL80211_KEK_LEN);
5824         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
5825                NL80211_KCK_LEN);
5826         memcpy(rekey_data.replay_ctr,
5827                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
5828                NL80211_REPLAY_CTR_LEN);
5829
5830         wdev_lock(wdev);
5831         if (!wdev->current_bss) {
5832                 err = -ENOTCONN;
5833                 goto out;
5834         }
5835
5836         if (!rdev->ops->set_rekey_data) {
5837                 err = -EOPNOTSUPP;
5838                 goto out;
5839         }
5840
5841         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
5842  out:
5843         wdev_unlock(wdev);
5844         return err;
5845 }
5846
5847 #define NL80211_FLAG_NEED_WIPHY         0x01
5848 #define NL80211_FLAG_NEED_NETDEV        0x02
5849 #define NL80211_FLAG_NEED_RTNL          0x04
5850 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
5851 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
5852                                          NL80211_FLAG_CHECK_NETDEV_UP)
5853
5854 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
5855                             struct genl_info *info)
5856 {
5857         struct cfg80211_registered_device *rdev;
5858         struct net_device *dev;
5859         int err;
5860         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
5861
5862         if (rtnl)
5863                 rtnl_lock();
5864
5865         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
5866                 rdev = cfg80211_get_dev_from_info(info);
5867                 if (IS_ERR(rdev)) {
5868                         if (rtnl)
5869                                 rtnl_unlock();
5870                         return PTR_ERR(rdev);
5871                 }
5872                 info->user_ptr[0] = rdev;
5873         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
5874                 err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
5875                 if (err) {
5876                         if (rtnl)
5877                                 rtnl_unlock();
5878                         return err;
5879                 }
5880                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
5881                     !netif_running(dev)) {
5882                         cfg80211_unlock_rdev(rdev);
5883                         dev_put(dev);
5884                         if (rtnl)
5885                                 rtnl_unlock();
5886                         return -ENETDOWN;
5887                 }
5888                 info->user_ptr[0] = rdev;
5889                 info->user_ptr[1] = dev;
5890         }
5891
5892         return 0;
5893 }
5894
5895 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
5896                               struct genl_info *info)
5897 {
5898         if (info->user_ptr[0])
5899                 cfg80211_unlock_rdev(info->user_ptr[0]);
5900         if (info->user_ptr[1])
5901                 dev_put(info->user_ptr[1]);
5902         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
5903                 rtnl_unlock();
5904 }
5905
5906 static struct genl_ops nl80211_ops[] = {
5907         {
5908                 .cmd = NL80211_CMD_GET_WIPHY,
5909                 .doit = nl80211_get_wiphy,
5910                 .dumpit = nl80211_dump_wiphy,
5911                 .policy = nl80211_policy,
5912                 /* can be retrieved by unprivileged users */
5913                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
5914         },
5915         {
5916                 .cmd = NL80211_CMD_SET_WIPHY,
5917                 .doit = nl80211_set_wiphy,
5918                 .policy = nl80211_policy,
5919                 .flags = GENL_ADMIN_PERM,
5920                 .internal_flags = NL80211_FLAG_NEED_RTNL,
5921         },
5922         {
5923                 .cmd = NL80211_CMD_GET_INTERFACE,
5924                 .doit = nl80211_get_interface,
5925                 .dumpit = nl80211_dump_interface,
5926                 .policy = nl80211_policy,
5927                 /* can be retrieved by unprivileged users */
5928                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
5929         },
5930         {
5931                 .cmd = NL80211_CMD_SET_INTERFACE,
5932                 .doit = nl80211_set_interface,
5933                 .policy = nl80211_policy,
5934                 .flags = GENL_ADMIN_PERM,
5935                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5936                                   NL80211_FLAG_NEED_RTNL,
5937         },
5938         {
5939                 .cmd = NL80211_CMD_NEW_INTERFACE,
5940                 .doit = nl80211_new_interface,
5941                 .policy = nl80211_policy,
5942                 .flags = GENL_ADMIN_PERM,
5943                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
5944                                   NL80211_FLAG_NEED_RTNL,
5945         },
5946         {
5947                 .cmd = NL80211_CMD_DEL_INTERFACE,
5948                 .doit = nl80211_del_interface,
5949                 .policy = nl80211_policy,
5950                 .flags = GENL_ADMIN_PERM,
5951                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
5952                                   NL80211_FLAG_NEED_RTNL,
5953         },
5954         {
5955                 .cmd = NL80211_CMD_GET_KEY,
5956                 .doit = nl80211_get_key,
5957                 .policy = nl80211_policy,
5958                 .flags = GENL_ADMIN_PERM,
5959                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5960                                   NL80211_FLAG_NEED_RTNL,
5961         },
5962         {
5963                 .cmd = NL80211_CMD_SET_KEY,
5964                 .doit = nl80211_set_key,
5965                 .policy = nl80211_policy,
5966                 .flags = GENL_ADMIN_PERM,
5967                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5968                                   NL80211_FLAG_NEED_RTNL,
5969         },
5970         {
5971                 .cmd = NL80211_CMD_NEW_KEY,
5972                 .doit = nl80211_new_key,
5973                 .policy = nl80211_policy,
5974                 .flags = GENL_ADMIN_PERM,
5975                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5976                                   NL80211_FLAG_NEED_RTNL,
5977         },
5978         {
5979                 .cmd = NL80211_CMD_DEL_KEY,
5980                 .doit = nl80211_del_key,
5981                 .policy = nl80211_policy,
5982                 .flags = GENL_ADMIN_PERM,
5983                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5984                                   NL80211_FLAG_NEED_RTNL,
5985         },
5986         {
5987                 .cmd = NL80211_CMD_SET_BEACON,
5988                 .policy = nl80211_policy,
5989                 .flags = GENL_ADMIN_PERM,
5990                 .doit = nl80211_addset_beacon,
5991                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
5992                                   NL80211_FLAG_NEED_RTNL,
5993         },
5994         {
5995                 .cmd = NL80211_CMD_NEW_BEACON,
5996                 .policy = nl80211_policy,
5997                 .flags = GENL_ADMIN_PERM,
5998                 .doit = nl80211_addset_beacon,
5999                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6000                                   NL80211_FLAG_NEED_RTNL,
6001         },
6002         {
6003                 .cmd = NL80211_CMD_DEL_BEACON,
6004                 .policy = nl80211_policy,
6005                 .flags = GENL_ADMIN_PERM,
6006                 .doit = nl80211_del_beacon,
6007                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6008                                   NL80211_FLAG_NEED_RTNL,
6009         },
6010         {
6011                 .cmd = NL80211_CMD_GET_STATION,
6012                 .doit = nl80211_get_station,
6013                 .dumpit = nl80211_dump_station,
6014                 .policy = nl80211_policy,
6015                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6016                                   NL80211_FLAG_NEED_RTNL,
6017         },
6018         {
6019                 .cmd = NL80211_CMD_SET_STATION,
6020                 .doit = nl80211_set_station,
6021                 .policy = nl80211_policy,
6022                 .flags = GENL_ADMIN_PERM,
6023                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6024                                   NL80211_FLAG_NEED_RTNL,
6025         },
6026         {
6027                 .cmd = NL80211_CMD_NEW_STATION,
6028                 .doit = nl80211_new_station,
6029                 .policy = nl80211_policy,
6030                 .flags = GENL_ADMIN_PERM,
6031                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6032                                   NL80211_FLAG_NEED_RTNL,
6033         },
6034         {
6035                 .cmd = NL80211_CMD_DEL_STATION,
6036                 .doit = nl80211_del_station,
6037                 .policy = nl80211_policy,
6038                 .flags = GENL_ADMIN_PERM,
6039                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6040                                   NL80211_FLAG_NEED_RTNL,
6041         },
6042         {
6043                 .cmd = NL80211_CMD_GET_MPATH,
6044                 .doit = nl80211_get_mpath,
6045                 .dumpit = nl80211_dump_mpath,
6046                 .policy = nl80211_policy,
6047                 .flags = GENL_ADMIN_PERM,
6048                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6049                                   NL80211_FLAG_NEED_RTNL,
6050         },
6051         {
6052                 .cmd = NL80211_CMD_SET_MPATH,
6053                 .doit = nl80211_set_mpath,
6054                 .policy = nl80211_policy,
6055                 .flags = GENL_ADMIN_PERM,
6056                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6057                                   NL80211_FLAG_NEED_RTNL,
6058         },
6059         {
6060                 .cmd = NL80211_CMD_NEW_MPATH,
6061                 .doit = nl80211_new_mpath,
6062                 .policy = nl80211_policy,
6063                 .flags = GENL_ADMIN_PERM,
6064                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6065                                   NL80211_FLAG_NEED_RTNL,
6066         },
6067         {
6068                 .cmd = NL80211_CMD_DEL_MPATH,
6069                 .doit = nl80211_del_mpath,
6070                 .policy = nl80211_policy,
6071                 .flags = GENL_ADMIN_PERM,
6072                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6073                                   NL80211_FLAG_NEED_RTNL,
6074         },
6075         {
6076                 .cmd = NL80211_CMD_SET_BSS,
6077                 .doit = nl80211_set_bss,
6078                 .policy = nl80211_policy,
6079                 .flags = GENL_ADMIN_PERM,
6080                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6081                                   NL80211_FLAG_NEED_RTNL,
6082         },
6083         {
6084                 .cmd = NL80211_CMD_GET_REG,
6085                 .doit = nl80211_get_reg,
6086                 .policy = nl80211_policy,
6087                 /* can be retrieved by unprivileged users */
6088         },
6089         {
6090                 .cmd = NL80211_CMD_SET_REG,
6091                 .doit = nl80211_set_reg,
6092                 .policy = nl80211_policy,
6093                 .flags = GENL_ADMIN_PERM,
6094         },
6095         {
6096                 .cmd = NL80211_CMD_REQ_SET_REG,
6097                 .doit = nl80211_req_set_reg,
6098                 .policy = nl80211_policy,
6099                 .flags = GENL_ADMIN_PERM,
6100         },
6101         {
6102                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6103                 .doit = nl80211_get_mesh_config,
6104                 .policy = nl80211_policy,
6105                 /* can be retrieved by unprivileged users */
6106                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6107                                   NL80211_FLAG_NEED_RTNL,
6108         },
6109         {
6110                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6111                 .doit = nl80211_update_mesh_config,
6112                 .policy = nl80211_policy,
6113                 .flags = GENL_ADMIN_PERM,
6114                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6115                                   NL80211_FLAG_NEED_RTNL,
6116         },
6117         {
6118                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6119                 .doit = nl80211_trigger_scan,
6120                 .policy = nl80211_policy,
6121                 .flags = GENL_ADMIN_PERM,
6122                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6123                                   NL80211_FLAG_NEED_RTNL,
6124         },
6125         {
6126                 .cmd = NL80211_CMD_GET_SCAN,
6127                 .policy = nl80211_policy,
6128                 .dumpit = nl80211_dump_scan,
6129         },
6130         {
6131                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6132                 .doit = nl80211_start_sched_scan,
6133                 .policy = nl80211_policy,
6134                 .flags = GENL_ADMIN_PERM,
6135                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6136                                   NL80211_FLAG_NEED_RTNL,
6137         },
6138         {
6139                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6140                 .doit = nl80211_stop_sched_scan,
6141                 .policy = nl80211_policy,
6142                 .flags = GENL_ADMIN_PERM,
6143                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6144                                   NL80211_FLAG_NEED_RTNL,
6145         },
6146         {
6147                 .cmd = NL80211_CMD_AUTHENTICATE,
6148                 .doit = nl80211_authenticate,
6149                 .policy = nl80211_policy,
6150                 .flags = GENL_ADMIN_PERM,
6151                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6152                                   NL80211_FLAG_NEED_RTNL,
6153         },
6154         {
6155                 .cmd = NL80211_CMD_ASSOCIATE,
6156                 .doit = nl80211_associate,
6157                 .policy = nl80211_policy,
6158                 .flags = GENL_ADMIN_PERM,
6159                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6160                                   NL80211_FLAG_NEED_RTNL,
6161         },
6162         {
6163                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6164                 .doit = nl80211_deauthenticate,
6165                 .policy = nl80211_policy,
6166                 .flags = GENL_ADMIN_PERM,
6167                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6168                                   NL80211_FLAG_NEED_RTNL,
6169         },
6170         {
6171                 .cmd = NL80211_CMD_DISASSOCIATE,
6172                 .doit = nl80211_disassociate,
6173                 .policy = nl80211_policy,
6174                 .flags = GENL_ADMIN_PERM,
6175                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6176                                   NL80211_FLAG_NEED_RTNL,
6177         },
6178         {
6179                 .cmd = NL80211_CMD_JOIN_IBSS,
6180                 .doit = nl80211_join_ibss,
6181                 .policy = nl80211_policy,
6182                 .flags = GENL_ADMIN_PERM,
6183                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6184                                   NL80211_FLAG_NEED_RTNL,
6185         },
6186         {
6187                 .cmd = NL80211_CMD_LEAVE_IBSS,
6188                 .doit = nl80211_leave_ibss,
6189                 .policy = nl80211_policy,
6190                 .flags = GENL_ADMIN_PERM,
6191                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6192                                   NL80211_FLAG_NEED_RTNL,
6193         },
6194 #ifdef CONFIG_NL80211_TESTMODE
6195         {
6196                 .cmd = NL80211_CMD_TESTMODE,
6197                 .doit = nl80211_testmode_do,
6198                 .dumpit = nl80211_testmode_dump,
6199                 .policy = nl80211_policy,
6200                 .flags = GENL_ADMIN_PERM,
6201                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6202                                   NL80211_FLAG_NEED_RTNL,
6203         },
6204 #endif
6205         {
6206                 .cmd = NL80211_CMD_CONNECT,
6207                 .doit = nl80211_connect,
6208                 .policy = nl80211_policy,
6209                 .flags = GENL_ADMIN_PERM,
6210                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6211                                   NL80211_FLAG_NEED_RTNL,
6212         },
6213         {
6214                 .cmd = NL80211_CMD_DISCONNECT,
6215                 .doit = nl80211_disconnect,
6216                 .policy = nl80211_policy,
6217                 .flags = GENL_ADMIN_PERM,
6218                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6219                                   NL80211_FLAG_NEED_RTNL,
6220         },
6221         {
6222                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
6223                 .doit = nl80211_wiphy_netns,
6224                 .policy = nl80211_policy,
6225                 .flags = GENL_ADMIN_PERM,
6226                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6227                                   NL80211_FLAG_NEED_RTNL,
6228         },
6229         {
6230                 .cmd = NL80211_CMD_GET_SURVEY,
6231                 .policy = nl80211_policy,
6232                 .dumpit = nl80211_dump_survey,
6233         },
6234         {
6235                 .cmd = NL80211_CMD_SET_PMKSA,
6236                 .doit = nl80211_setdel_pmksa,
6237                 .policy = nl80211_policy,
6238                 .flags = GENL_ADMIN_PERM,
6239                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6240                                   NL80211_FLAG_NEED_RTNL,
6241         },
6242         {
6243                 .cmd = NL80211_CMD_DEL_PMKSA,
6244                 .doit = nl80211_setdel_pmksa,
6245                 .policy = nl80211_policy,
6246                 .flags = GENL_ADMIN_PERM,
6247                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6248                                   NL80211_FLAG_NEED_RTNL,
6249         },
6250         {
6251                 .cmd = NL80211_CMD_FLUSH_PMKSA,
6252                 .doit = nl80211_flush_pmksa,
6253                 .policy = nl80211_policy,
6254                 .flags = GENL_ADMIN_PERM,
6255                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6256                                   NL80211_FLAG_NEED_RTNL,
6257         },
6258         {
6259                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
6260                 .doit = nl80211_remain_on_channel,
6261                 .policy = nl80211_policy,
6262                 .flags = GENL_ADMIN_PERM,
6263                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6264                                   NL80211_FLAG_NEED_RTNL,
6265         },
6266         {
6267                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
6268                 .doit = nl80211_cancel_remain_on_channel,
6269                 .policy = nl80211_policy,
6270                 .flags = GENL_ADMIN_PERM,
6271                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6272                                   NL80211_FLAG_NEED_RTNL,
6273         },
6274         {
6275                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
6276                 .doit = nl80211_set_tx_bitrate_mask,
6277                 .policy = nl80211_policy,
6278                 .flags = GENL_ADMIN_PERM,
6279                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6280                                   NL80211_FLAG_NEED_RTNL,
6281         },
6282         {
6283                 .cmd = NL80211_CMD_REGISTER_FRAME,
6284                 .doit = nl80211_register_mgmt,
6285                 .policy = nl80211_policy,
6286                 .flags = GENL_ADMIN_PERM,
6287                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6288                                   NL80211_FLAG_NEED_RTNL,
6289         },
6290         {
6291                 .cmd = NL80211_CMD_FRAME,
6292                 .doit = nl80211_tx_mgmt,
6293                 .policy = nl80211_policy,
6294                 .flags = GENL_ADMIN_PERM,
6295                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6296                                   NL80211_FLAG_NEED_RTNL,
6297         },
6298         {
6299                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
6300                 .doit = nl80211_tx_mgmt_cancel_wait,
6301                 .policy = nl80211_policy,
6302                 .flags = GENL_ADMIN_PERM,
6303                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6304                                   NL80211_FLAG_NEED_RTNL,
6305         },
6306         {
6307                 .cmd = NL80211_CMD_SET_POWER_SAVE,
6308                 .doit = nl80211_set_power_save,
6309                 .policy = nl80211_policy,
6310                 .flags = GENL_ADMIN_PERM,
6311                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6312                                   NL80211_FLAG_NEED_RTNL,
6313         },
6314         {
6315                 .cmd = NL80211_CMD_GET_POWER_SAVE,
6316                 .doit = nl80211_get_power_save,
6317                 .policy = nl80211_policy,
6318                 /* can be retrieved by unprivileged users */
6319                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6320                                   NL80211_FLAG_NEED_RTNL,
6321         },
6322         {
6323                 .cmd = NL80211_CMD_SET_CQM,
6324                 .doit = nl80211_set_cqm,
6325                 .policy = nl80211_policy,
6326                 .flags = GENL_ADMIN_PERM,
6327                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6328                                   NL80211_FLAG_NEED_RTNL,
6329         },
6330         {
6331                 .cmd = NL80211_CMD_SET_CHANNEL,
6332                 .doit = nl80211_set_channel,
6333                 .policy = nl80211_policy,
6334                 .flags = GENL_ADMIN_PERM,
6335                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6336                                   NL80211_FLAG_NEED_RTNL,
6337         },
6338         {
6339                 .cmd = NL80211_CMD_SET_WDS_PEER,
6340                 .doit = nl80211_set_wds_peer,
6341                 .policy = nl80211_policy,
6342                 .flags = GENL_ADMIN_PERM,
6343                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6344                                   NL80211_FLAG_NEED_RTNL,
6345         },
6346         {
6347                 .cmd = NL80211_CMD_JOIN_MESH,
6348                 .doit = nl80211_join_mesh,
6349                 .policy = nl80211_policy,
6350                 .flags = GENL_ADMIN_PERM,
6351                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6352                                   NL80211_FLAG_NEED_RTNL,
6353         },
6354         {
6355                 .cmd = NL80211_CMD_LEAVE_MESH,
6356                 .doit = nl80211_leave_mesh,
6357                 .policy = nl80211_policy,
6358                 .flags = GENL_ADMIN_PERM,
6359                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6360                                   NL80211_FLAG_NEED_RTNL,
6361         },
6362         {
6363                 .cmd = NL80211_CMD_GET_WOWLAN,
6364                 .doit = nl80211_get_wowlan,
6365                 .policy = nl80211_policy,
6366                 /* can be retrieved by unprivileged users */
6367                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6368                                   NL80211_FLAG_NEED_RTNL,
6369         },
6370         {
6371                 .cmd = NL80211_CMD_SET_WOWLAN,
6372                 .doit = nl80211_set_wowlan,
6373                 .policy = nl80211_policy,
6374                 .flags = GENL_ADMIN_PERM,
6375                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6376                                   NL80211_FLAG_NEED_RTNL,
6377         },
6378         {
6379                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
6380                 .doit = nl80211_set_rekey_data,
6381                 .policy = nl80211_policy,
6382                 .flags = GENL_ADMIN_PERM,
6383                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6384                                   NL80211_FLAG_NEED_RTNL,
6385         },
6386         {
6387                 .cmd = NL80211_CMD_TDLS_MGMT,
6388                 .doit = nl80211_tdls_mgmt,
6389                 .policy = nl80211_policy,
6390                 .flags = GENL_ADMIN_PERM,
6391                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6392                                   NL80211_FLAG_NEED_RTNL,
6393         },
6394         {
6395                 .cmd = NL80211_CMD_TDLS_OPER,
6396                 .doit = nl80211_tdls_oper,
6397                 .policy = nl80211_policy,
6398                 .flags = GENL_ADMIN_PERM,
6399                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6400                                   NL80211_FLAG_NEED_RTNL,
6401         },
6402 };
6403
6404 static struct genl_multicast_group nl80211_mlme_mcgrp = {
6405         .name = "mlme",
6406 };
6407
6408 /* multicast groups */
6409 static struct genl_multicast_group nl80211_config_mcgrp = {
6410         .name = "config",
6411 };
6412 static struct genl_multicast_group nl80211_scan_mcgrp = {
6413         .name = "scan",
6414 };
6415 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
6416         .name = "regulatory",
6417 };
6418
6419 /* notification functions */
6420
6421 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
6422 {
6423         struct sk_buff *msg;
6424
6425         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6426         if (!msg)
6427                 return;
6428
6429         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
6430                 nlmsg_free(msg);
6431                 return;
6432         }
6433
6434         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6435                                 nl80211_config_mcgrp.id, GFP_KERNEL);
6436 }
6437
6438 static int nl80211_add_scan_req(struct sk_buff *msg,
6439                                 struct cfg80211_registered_device *rdev)
6440 {
6441         struct cfg80211_scan_request *req = rdev->scan_req;
6442         struct nlattr *nest;
6443         int i;
6444
6445         ASSERT_RDEV_LOCK(rdev);
6446
6447         if (WARN_ON(!req))
6448                 return 0;
6449
6450         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
6451         if (!nest)
6452                 goto nla_put_failure;
6453         for (i = 0; i < req->n_ssids; i++)
6454                 NLA_PUT(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid);
6455         nla_nest_end(msg, nest);
6456
6457         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
6458         if (!nest)
6459                 goto nla_put_failure;
6460         for (i = 0; i < req->n_channels; i++)
6461                 NLA_PUT_U32(msg, i, req->channels[i]->center_freq);
6462         nla_nest_end(msg, nest);
6463
6464         if (req->ie)
6465                 NLA_PUT(msg, NL80211_ATTR_IE, req->ie_len, req->ie);
6466
6467         return 0;
6468  nla_put_failure:
6469         return -ENOBUFS;
6470 }
6471
6472 static int nl80211_send_scan_msg(struct sk_buff *msg,
6473                                  struct cfg80211_registered_device *rdev,
6474                                  struct net_device *netdev,
6475                                  u32 pid, u32 seq, int flags,
6476                                  u32 cmd)
6477 {
6478         void *hdr;
6479
6480         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6481         if (!hdr)
6482                 return -1;
6483
6484         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6485         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6486
6487         /* ignore errors and send incomplete event anyway */
6488         nl80211_add_scan_req(msg, rdev);
6489
6490         return genlmsg_end(msg, hdr);
6491
6492  nla_put_failure:
6493         genlmsg_cancel(msg, hdr);
6494         return -EMSGSIZE;
6495 }
6496
6497 static int
6498 nl80211_send_sched_scan_msg(struct sk_buff *msg,
6499                             struct cfg80211_registered_device *rdev,
6500                             struct net_device *netdev,
6501                             u32 pid, u32 seq, int flags, u32 cmd)
6502 {
6503         void *hdr;
6504
6505         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
6506         if (!hdr)
6507                 return -1;
6508
6509         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6510         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6511
6512         return genlmsg_end(msg, hdr);
6513
6514  nla_put_failure:
6515         genlmsg_cancel(msg, hdr);
6516         return -EMSGSIZE;
6517 }
6518
6519 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
6520                              struct net_device *netdev)
6521 {
6522         struct sk_buff *msg;
6523
6524         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6525         if (!msg)
6526                 return;
6527
6528         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6529                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
6530                 nlmsg_free(msg);
6531                 return;
6532         }
6533
6534         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6535                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6536 }
6537
6538 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
6539                             struct net_device *netdev)
6540 {
6541         struct sk_buff *msg;
6542
6543         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6544         if (!msg)
6545                 return;
6546
6547         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6548                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
6549                 nlmsg_free(msg);
6550                 return;
6551         }
6552
6553         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6554                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6555 }
6556
6557 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
6558                                struct net_device *netdev)
6559 {
6560         struct sk_buff *msg;
6561
6562         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6563         if (!msg)
6564                 return;
6565
6566         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
6567                                   NL80211_CMD_SCAN_ABORTED) < 0) {
6568                 nlmsg_free(msg);
6569                 return;
6570         }
6571
6572         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6573                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6574 }
6575
6576 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
6577                                      struct net_device *netdev)
6578 {
6579         struct sk_buff *msg;
6580
6581         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6582         if (!msg)
6583                 return;
6584
6585         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
6586                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
6587                 nlmsg_free(msg);
6588                 return;
6589         }
6590
6591         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6592                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6593 }
6594
6595 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
6596                              struct net_device *netdev, u32 cmd)
6597 {
6598         struct sk_buff *msg;
6599
6600         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6601         if (!msg)
6602                 return;
6603
6604         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
6605                 nlmsg_free(msg);
6606                 return;
6607         }
6608
6609         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6610                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
6611 }
6612
6613 /*
6614  * This can happen on global regulatory changes or device specific settings
6615  * based on custom world regulatory domains.
6616  */
6617 void nl80211_send_reg_change_event(struct regulatory_request *request)
6618 {
6619         struct sk_buff *msg;
6620         void *hdr;
6621
6622         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6623         if (!msg)
6624                 return;
6625
6626         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
6627         if (!hdr) {
6628                 nlmsg_free(msg);
6629                 return;
6630         }
6631
6632         /* Userspace can always count this one always being set */
6633         NLA_PUT_U8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator);
6634
6635         if (request->alpha2[0] == '0' && request->alpha2[1] == '0')
6636                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6637                            NL80211_REGDOM_TYPE_WORLD);
6638         else if (request->alpha2[0] == '9' && request->alpha2[1] == '9')
6639                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6640                            NL80211_REGDOM_TYPE_CUSTOM_WORLD);
6641         else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
6642                  request->intersect)
6643                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6644                            NL80211_REGDOM_TYPE_INTERSECTION);
6645         else {
6646                 NLA_PUT_U8(msg, NL80211_ATTR_REG_TYPE,
6647                            NL80211_REGDOM_TYPE_COUNTRY);
6648                 NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, request->alpha2);
6649         }
6650
6651         if (wiphy_idx_valid(request->wiphy_idx))
6652                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx);
6653
6654         if (genlmsg_end(msg, hdr) < 0) {
6655                 nlmsg_free(msg);
6656                 return;
6657         }
6658
6659         rcu_read_lock();
6660         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
6661                                 GFP_ATOMIC);
6662         rcu_read_unlock();
6663
6664         return;
6665
6666 nla_put_failure:
6667         genlmsg_cancel(msg, hdr);
6668         nlmsg_free(msg);
6669 }
6670
6671 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
6672                                     struct net_device *netdev,
6673                                     const u8 *buf, size_t len,
6674                                     enum nl80211_commands cmd, gfp_t gfp)
6675 {
6676         struct sk_buff *msg;
6677         void *hdr;
6678
6679         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6680         if (!msg)
6681                 return;
6682
6683         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6684         if (!hdr) {
6685                 nlmsg_free(msg);
6686                 return;
6687         }
6688
6689         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6690         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6691         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
6692
6693         if (genlmsg_end(msg, hdr) < 0) {
6694                 nlmsg_free(msg);
6695                 return;
6696         }
6697
6698         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6699                                 nl80211_mlme_mcgrp.id, gfp);
6700         return;
6701
6702  nla_put_failure:
6703         genlmsg_cancel(msg, hdr);
6704         nlmsg_free(msg);
6705 }
6706
6707 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
6708                           struct net_device *netdev, const u8 *buf,
6709                           size_t len, gfp_t gfp)
6710 {
6711         nl80211_send_mlme_event(rdev, netdev, buf, len,
6712                                 NL80211_CMD_AUTHENTICATE, gfp);
6713 }
6714
6715 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
6716                            struct net_device *netdev, const u8 *buf,
6717                            size_t len, gfp_t gfp)
6718 {
6719         nl80211_send_mlme_event(rdev, netdev, buf, len,
6720                                 NL80211_CMD_ASSOCIATE, gfp);
6721 }
6722
6723 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
6724                          struct net_device *netdev, const u8 *buf,
6725                          size_t len, gfp_t gfp)
6726 {
6727         nl80211_send_mlme_event(rdev, netdev, buf, len,
6728                                 NL80211_CMD_DEAUTHENTICATE, gfp);
6729 }
6730
6731 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
6732                            struct net_device *netdev, const u8 *buf,
6733                            size_t len, gfp_t gfp)
6734 {
6735         nl80211_send_mlme_event(rdev, netdev, buf, len,
6736                                 NL80211_CMD_DISASSOCIATE, gfp);
6737 }
6738
6739 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
6740                                 struct net_device *netdev, const u8 *buf,
6741                                 size_t len, gfp_t gfp)
6742 {
6743         nl80211_send_mlme_event(rdev, netdev, buf, len,
6744                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
6745 }
6746
6747 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
6748                                   struct net_device *netdev, const u8 *buf,
6749                                   size_t len, gfp_t gfp)
6750 {
6751         nl80211_send_mlme_event(rdev, netdev, buf, len,
6752                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
6753 }
6754
6755 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
6756                                       struct net_device *netdev, int cmd,
6757                                       const u8 *addr, gfp_t gfp)
6758 {
6759         struct sk_buff *msg;
6760         void *hdr;
6761
6762         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6763         if (!msg)
6764                 return;
6765
6766         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
6767         if (!hdr) {
6768                 nlmsg_free(msg);
6769                 return;
6770         }
6771
6772         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6773         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6774         NLA_PUT_FLAG(msg, NL80211_ATTR_TIMED_OUT);
6775         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
6776
6777         if (genlmsg_end(msg, hdr) < 0) {
6778                 nlmsg_free(msg);
6779                 return;
6780         }
6781
6782         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6783                                 nl80211_mlme_mcgrp.id, gfp);
6784         return;
6785
6786  nla_put_failure:
6787         genlmsg_cancel(msg, hdr);
6788         nlmsg_free(msg);
6789 }
6790
6791 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
6792                                struct net_device *netdev, const u8 *addr,
6793                                gfp_t gfp)
6794 {
6795         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
6796                                   addr, gfp);
6797 }
6798
6799 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
6800                                 struct net_device *netdev, const u8 *addr,
6801                                 gfp_t gfp)
6802 {
6803         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
6804                                   addr, gfp);
6805 }
6806
6807 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
6808                                  struct net_device *netdev, const u8 *bssid,
6809                                  const u8 *req_ie, size_t req_ie_len,
6810                                  const u8 *resp_ie, size_t resp_ie_len,
6811                                  u16 status, gfp_t gfp)
6812 {
6813         struct sk_buff *msg;
6814         void *hdr;
6815
6816         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6817         if (!msg)
6818                 return;
6819
6820         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
6821         if (!hdr) {
6822                 nlmsg_free(msg);
6823                 return;
6824         }
6825
6826         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6827         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6828         if (bssid)
6829                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6830         NLA_PUT_U16(msg, NL80211_ATTR_STATUS_CODE, status);
6831         if (req_ie)
6832                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6833         if (resp_ie)
6834                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6835
6836         if (genlmsg_end(msg, hdr) < 0) {
6837                 nlmsg_free(msg);
6838                 return;
6839         }
6840
6841         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6842                                 nl80211_mlme_mcgrp.id, gfp);
6843         return;
6844
6845  nla_put_failure:
6846         genlmsg_cancel(msg, hdr);
6847         nlmsg_free(msg);
6848
6849 }
6850
6851 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
6852                          struct net_device *netdev, const u8 *bssid,
6853                          const u8 *req_ie, size_t req_ie_len,
6854                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
6855 {
6856         struct sk_buff *msg;
6857         void *hdr;
6858
6859         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
6860         if (!msg)
6861                 return;
6862
6863         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
6864         if (!hdr) {
6865                 nlmsg_free(msg);
6866                 return;
6867         }
6868
6869         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6870         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6871         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6872         if (req_ie)
6873                 NLA_PUT(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie);
6874         if (resp_ie)
6875                 NLA_PUT(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie);
6876
6877         if (genlmsg_end(msg, hdr) < 0) {
6878                 nlmsg_free(msg);
6879                 return;
6880         }
6881
6882         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6883                                 nl80211_mlme_mcgrp.id, gfp);
6884         return;
6885
6886  nla_put_failure:
6887         genlmsg_cancel(msg, hdr);
6888         nlmsg_free(msg);
6889
6890 }
6891
6892 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
6893                                struct net_device *netdev, u16 reason,
6894                                const u8 *ie, size_t ie_len, bool from_ap)
6895 {
6896         struct sk_buff *msg;
6897         void *hdr;
6898
6899         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
6900         if (!msg)
6901                 return;
6902
6903         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
6904         if (!hdr) {
6905                 nlmsg_free(msg);
6906                 return;
6907         }
6908
6909         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6910         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6911         if (from_ap && reason)
6912                 NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason);
6913         if (from_ap)
6914                 NLA_PUT_FLAG(msg, NL80211_ATTR_DISCONNECTED_BY_AP);
6915         if (ie)
6916                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len, ie);
6917
6918         if (genlmsg_end(msg, hdr) < 0) {
6919                 nlmsg_free(msg);
6920                 return;
6921         }
6922
6923         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6924                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
6925         return;
6926
6927  nla_put_failure:
6928         genlmsg_cancel(msg, hdr);
6929         nlmsg_free(msg);
6930
6931 }
6932
6933 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
6934                              struct net_device *netdev, const u8 *bssid,
6935                              gfp_t gfp)
6936 {
6937         struct sk_buff *msg;
6938         void *hdr;
6939
6940         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6941         if (!msg)
6942                 return;
6943
6944         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
6945         if (!hdr) {
6946                 nlmsg_free(msg);
6947                 return;
6948         }
6949
6950         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6951         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6952         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
6953
6954         if (genlmsg_end(msg, hdr) < 0) {
6955                 nlmsg_free(msg);
6956                 return;
6957         }
6958
6959         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6960                                 nl80211_mlme_mcgrp.id, gfp);
6961         return;
6962
6963  nla_put_failure:
6964         genlmsg_cancel(msg, hdr);
6965         nlmsg_free(msg);
6966 }
6967
6968 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
6969                 struct net_device *netdev,
6970                 const u8 *macaddr, const u8* ie, u8 ie_len,
6971                 gfp_t gfp)
6972 {
6973         struct sk_buff *msg;
6974         void *hdr;
6975
6976         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
6977         if (!msg)
6978                 return;
6979
6980         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
6981         if (!hdr) {
6982                 nlmsg_free(msg);
6983                 return;
6984         }
6985
6986         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
6987         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
6988         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr);
6989         if (ie_len && ie)
6990                 NLA_PUT(msg, NL80211_ATTR_IE, ie_len , ie);
6991
6992         if (genlmsg_end(msg, hdr) < 0) {
6993                 nlmsg_free(msg);
6994                 return;
6995         }
6996
6997         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
6998                                 nl80211_mlme_mcgrp.id, gfp);
6999         return;
7000
7001  nla_put_failure:
7002         genlmsg_cancel(msg, hdr);
7003         nlmsg_free(msg);
7004 }
7005
7006 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7007                                  struct net_device *netdev, const u8 *addr,
7008                                  enum nl80211_key_type key_type, int key_id,
7009                                  const u8 *tsc, gfp_t gfp)
7010 {
7011         struct sk_buff *msg;
7012         void *hdr;
7013
7014         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7015         if (!msg)
7016                 return;
7017
7018         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7019         if (!hdr) {
7020                 nlmsg_free(msg);
7021                 return;
7022         }
7023
7024         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7025         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7026         if (addr)
7027                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
7028         NLA_PUT_U32(msg, NL80211_ATTR_KEY_TYPE, key_type);
7029         if (key_id != -1)
7030                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_id);
7031         if (tsc)
7032                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, 6, tsc);
7033
7034         if (genlmsg_end(msg, hdr) < 0) {
7035                 nlmsg_free(msg);
7036                 return;
7037         }
7038
7039         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7040                                 nl80211_mlme_mcgrp.id, gfp);
7041         return;
7042
7043  nla_put_failure:
7044         genlmsg_cancel(msg, hdr);
7045         nlmsg_free(msg);
7046 }
7047
7048 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7049                                     struct ieee80211_channel *channel_before,
7050                                     struct ieee80211_channel *channel_after)
7051 {
7052         struct sk_buff *msg;
7053         void *hdr;
7054         struct nlattr *nl_freq;
7055
7056         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7057         if (!msg)
7058                 return;
7059
7060         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7061         if (!hdr) {
7062                 nlmsg_free(msg);
7063                 return;
7064         }
7065
7066         /*
7067          * Since we are applying the beacon hint to a wiphy we know its
7068          * wiphy_idx is valid
7069          */
7070         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
7071
7072         /* Before */
7073         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7074         if (!nl_freq)
7075                 goto nla_put_failure;
7076         if (nl80211_msg_put_channel(msg, channel_before))
7077                 goto nla_put_failure;
7078         nla_nest_end(msg, nl_freq);
7079
7080         /* After */
7081         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7082         if (!nl_freq)
7083                 goto nla_put_failure;
7084         if (nl80211_msg_put_channel(msg, channel_after))
7085                 goto nla_put_failure;
7086         nla_nest_end(msg, nl_freq);
7087
7088         if (genlmsg_end(msg, hdr) < 0) {
7089                 nlmsg_free(msg);
7090                 return;
7091         }
7092
7093         rcu_read_lock();
7094         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7095                                 GFP_ATOMIC);
7096         rcu_read_unlock();
7097
7098         return;
7099
7100 nla_put_failure:
7101         genlmsg_cancel(msg, hdr);
7102         nlmsg_free(msg);
7103 }
7104
7105 static void nl80211_send_remain_on_chan_event(
7106         int cmd, struct cfg80211_registered_device *rdev,
7107         struct net_device *netdev, u64 cookie,
7108         struct ieee80211_channel *chan,
7109         enum nl80211_channel_type channel_type,
7110         unsigned int duration, gfp_t gfp)
7111 {
7112         struct sk_buff *msg;
7113         void *hdr;
7114
7115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7116         if (!msg)
7117                 return;
7118
7119         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7120         if (!hdr) {
7121                 nlmsg_free(msg);
7122                 return;
7123         }
7124
7125         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7126         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7127         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
7128         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
7129         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7130
7131         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
7132                 NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
7133
7134         if (genlmsg_end(msg, hdr) < 0) {
7135                 nlmsg_free(msg);
7136                 return;
7137         }
7138
7139         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7140                                 nl80211_mlme_mcgrp.id, gfp);
7141         return;
7142
7143  nla_put_failure:
7144         genlmsg_cancel(msg, hdr);
7145         nlmsg_free(msg);
7146 }
7147
7148 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7149                                     struct net_device *netdev, u64 cookie,
7150                                     struct ieee80211_channel *chan,
7151                                     enum nl80211_channel_type channel_type,
7152                                     unsigned int duration, gfp_t gfp)
7153 {
7154         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7155                                           rdev, netdev, cookie, chan,
7156                                           channel_type, duration, gfp);
7157 }
7158
7159 void nl80211_send_remain_on_channel_cancel(
7160         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7161         u64 cookie, struct ieee80211_channel *chan,
7162         enum nl80211_channel_type channel_type, gfp_t gfp)
7163 {
7164         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7165                                           rdev, netdev, cookie, chan,
7166                                           channel_type, 0, gfp);
7167 }
7168
7169 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7170                             struct net_device *dev, const u8 *mac_addr,
7171                             struct station_info *sinfo, gfp_t gfp)
7172 {
7173         struct sk_buff *msg;
7174
7175         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7176         if (!msg)
7177                 return;
7178
7179         if (nl80211_send_station(msg, 0, 0, 0, dev, mac_addr, sinfo) < 0) {
7180                 nlmsg_free(msg);
7181                 return;
7182         }
7183
7184         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7185                                 nl80211_mlme_mcgrp.id, gfp);
7186 }
7187
7188 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
7189                                 struct net_device *dev, const u8 *mac_addr,
7190                                 gfp_t gfp)
7191 {
7192         struct sk_buff *msg;
7193         void *hdr;
7194
7195         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7196         if (!msg)
7197                 return;
7198
7199         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
7200         if (!hdr) {
7201                 nlmsg_free(msg);
7202                 return;
7203         }
7204
7205         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, dev->ifindex);
7206         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr);
7207
7208         if (genlmsg_end(msg, hdr) < 0) {
7209                 nlmsg_free(msg);
7210                 return;
7211         }
7212
7213         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7214                                 nl80211_mlme_mcgrp.id, gfp);
7215         return;
7216
7217  nla_put_failure:
7218         genlmsg_cancel(msg, hdr);
7219         nlmsg_free(msg);
7220 }
7221
7222 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
7223                       struct net_device *netdev, u32 nlpid,
7224                       int freq, const u8 *buf, size_t len, gfp_t gfp)
7225 {
7226         struct sk_buff *msg;
7227         void *hdr;
7228         int err;
7229
7230         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7231         if (!msg)
7232                 return -ENOMEM;
7233
7234         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
7235         if (!hdr) {
7236                 nlmsg_free(msg);
7237                 return -ENOMEM;
7238         }
7239
7240         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7241         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7242         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
7243         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7244
7245         err = genlmsg_end(msg, hdr);
7246         if (err < 0) {
7247                 nlmsg_free(msg);
7248                 return err;
7249         }
7250
7251         err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
7252         if (err < 0)
7253                 return err;
7254         return 0;
7255
7256  nla_put_failure:
7257         genlmsg_cancel(msg, hdr);
7258         nlmsg_free(msg);
7259         return -ENOBUFS;
7260 }
7261
7262 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
7263                                  struct net_device *netdev, u64 cookie,
7264                                  const u8 *buf, size_t len, bool ack,
7265                                  gfp_t gfp)
7266 {
7267         struct sk_buff *msg;
7268         void *hdr;
7269
7270         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7271         if (!msg)
7272                 return;
7273
7274         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
7275         if (!hdr) {
7276                 nlmsg_free(msg);
7277                 return;
7278         }
7279
7280         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7281         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7282         NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
7283         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
7284         if (ack)
7285                 NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
7286
7287         if (genlmsg_end(msg, hdr) < 0) {
7288                 nlmsg_free(msg);
7289                 return;
7290         }
7291
7292         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7293                                 nl80211_mlme_mcgrp.id, gfp);
7294         return;
7295
7296  nla_put_failure:
7297         genlmsg_cancel(msg, hdr);
7298         nlmsg_free(msg);
7299 }
7300
7301 void
7302 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
7303                              struct net_device *netdev,
7304                              enum nl80211_cqm_rssi_threshold_event rssi_event,
7305                              gfp_t gfp)
7306 {
7307         struct sk_buff *msg;
7308         struct nlattr *pinfoattr;
7309         void *hdr;
7310
7311         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7312         if (!msg)
7313                 return;
7314
7315         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7316         if (!hdr) {
7317                 nlmsg_free(msg);
7318                 return;
7319         }
7320
7321         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7322         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7323
7324         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7325         if (!pinfoattr)
7326                 goto nla_put_failure;
7327
7328         NLA_PUT_U32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
7329                     rssi_event);
7330
7331         nla_nest_end(msg, pinfoattr);
7332
7333         if (genlmsg_end(msg, hdr) < 0) {
7334                 nlmsg_free(msg);
7335                 return;
7336         }
7337
7338         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7339                                 nl80211_mlme_mcgrp.id, gfp);
7340         return;
7341
7342  nla_put_failure:
7343         genlmsg_cancel(msg, hdr);
7344         nlmsg_free(msg);
7345 }
7346
7347 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
7348                               struct net_device *netdev, const u8 *bssid,
7349                               const u8 *replay_ctr, gfp_t gfp)
7350 {
7351         struct sk_buff *msg;
7352         struct nlattr *rekey_attr;
7353         void *hdr;
7354
7355         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7356         if (!msg)
7357                 return;
7358
7359         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
7360         if (!hdr) {
7361                 nlmsg_free(msg);
7362                 return;
7363         }
7364
7365         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7366         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7367         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid);
7368
7369         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
7370         if (!rekey_attr)
7371                 goto nla_put_failure;
7372
7373         NLA_PUT(msg, NL80211_REKEY_DATA_REPLAY_CTR,
7374                 NL80211_REPLAY_CTR_LEN, replay_ctr);
7375
7376         nla_nest_end(msg, rekey_attr);
7377
7378         if (genlmsg_end(msg, hdr) < 0) {
7379                 nlmsg_free(msg);
7380                 return;
7381         }
7382
7383         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7384                                 nl80211_mlme_mcgrp.id, gfp);
7385         return;
7386
7387  nla_put_failure:
7388         genlmsg_cancel(msg, hdr);
7389         nlmsg_free(msg);
7390 }
7391
7392 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
7393                                     struct net_device *netdev, int index,
7394                                     const u8 *bssid, bool preauth, gfp_t gfp)
7395 {
7396         struct sk_buff *msg;
7397         struct nlattr *attr;
7398         void *hdr;
7399
7400         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7401         if (!msg)
7402                 return;
7403
7404         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
7405         if (!hdr) {
7406                 nlmsg_free(msg);
7407                 return;
7408         }
7409
7410         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7411         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7412
7413         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
7414         if (!attr)
7415                 goto nla_put_failure;
7416
7417         NLA_PUT_U32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index);
7418         NLA_PUT(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid);
7419         if (preauth)
7420                 NLA_PUT_FLAG(msg, NL80211_PMKSA_CANDIDATE_PREAUTH);
7421
7422         nla_nest_end(msg, attr);
7423
7424         if (genlmsg_end(msg, hdr) < 0) {
7425                 nlmsg_free(msg);
7426                 return;
7427         }
7428
7429         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7430                                 nl80211_mlme_mcgrp.id, gfp);
7431         return;
7432
7433  nla_put_failure:
7434         genlmsg_cancel(msg, hdr);
7435         nlmsg_free(msg);
7436 }
7437
7438 void
7439 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
7440                                 struct net_device *netdev, const u8 *peer,
7441                                 u32 num_packets, gfp_t gfp)
7442 {
7443         struct sk_buff *msg;
7444         struct nlattr *pinfoattr;
7445         void *hdr;
7446
7447         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7448         if (!msg)
7449                 return;
7450
7451         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
7452         if (!hdr) {
7453                 nlmsg_free(msg);
7454                 return;
7455         }
7456
7457         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
7458         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
7459         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, peer);
7460
7461         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
7462         if (!pinfoattr)
7463                 goto nla_put_failure;
7464
7465         NLA_PUT_U32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets);
7466
7467         nla_nest_end(msg, pinfoattr);
7468
7469         if (genlmsg_end(msg, hdr) < 0) {
7470                 nlmsg_free(msg);
7471                 return;
7472         }
7473
7474         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7475                                 nl80211_mlme_mcgrp.id, gfp);
7476         return;
7477
7478  nla_put_failure:
7479         genlmsg_cancel(msg, hdr);
7480         nlmsg_free(msg);
7481 }
7482
7483 static int nl80211_netlink_notify(struct notifier_block * nb,
7484                                   unsigned long state,
7485                                   void *_notify)
7486 {
7487         struct netlink_notify *notify = _notify;
7488         struct cfg80211_registered_device *rdev;
7489         struct wireless_dev *wdev;
7490
7491         if (state != NETLINK_URELEASE)
7492                 return NOTIFY_DONE;
7493
7494         rcu_read_lock();
7495
7496         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
7497                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
7498                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
7499
7500         rcu_read_unlock();
7501
7502         return NOTIFY_DONE;
7503 }
7504
7505 static struct notifier_block nl80211_netlink_notifier = {
7506         .notifier_call = nl80211_netlink_notify,
7507 };
7508
7509 /* initialisation/exit functions */
7510
7511 int nl80211_init(void)
7512 {
7513         int err;
7514
7515         err = genl_register_family_with_ops(&nl80211_fam,
7516                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
7517         if (err)
7518                 return err;
7519
7520         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
7521         if (err)
7522                 goto err_out;
7523
7524         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
7525         if (err)
7526                 goto err_out;
7527
7528         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
7529         if (err)
7530                 goto err_out;
7531
7532         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
7533         if (err)
7534                 goto err_out;
7535
7536 #ifdef CONFIG_NL80211_TESTMODE
7537         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
7538         if (err)
7539                 goto err_out;
7540 #endif
7541
7542         err = netlink_register_notifier(&nl80211_netlink_notifier);
7543         if (err)
7544                 goto err_out;
7545
7546         return 0;
7547  err_out:
7548         genl_unregister_family(&nl80211_fam);
7549         return err;
7550 }
7551
7552 void nl80211_exit(void)
7553 {
7554         netlink_unregister_notifier(&nl80211_netlink_notifier);
7555         genl_unregister_family(&nl80211_fam);
7556 }