Pileus Git - ~andy/linux/blob - 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_ifindex(struct net *netns, struct nlattr **attrs,
  51                                    struct cfg80211_registered_device **rdev,
  52                                    struct net_device **dev)
  53 {
  54         int ifindex;
  55
  56         if (!attrs[NL80211_ATTR_IFINDEX])
  57                 return -EINVAL;
  58
  59         ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  60         *dev = dev_get_by_index(netns, ifindex);
  61         if (!*dev)
  62                 return -ENODEV;
  63
  64         *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  65         if (IS_ERR(*rdev)) {
  66                 dev_put(*dev);
  67                 return PTR_ERR(*rdev);
  68         }
  69
  70         return 0;
  71 }
  72
  73 static struct cfg80211_registered_device *
  74 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
  75 {
  76         struct cfg80211_registered_device *rdev = NULL, *tmp;
  77         struct net_device *netdev;
  78
  79         assert_cfg80211_lock();
  80
  81         if (!attrs[NL80211_ATTR_WIPHY] &&
  82             !attrs[NL80211_ATTR_IFINDEX])
  83                 return ERR_PTR(-EINVAL);
  84
  85         if (attrs[NL80211_ATTR_WIPHY])
  86                 rdev = cfg80211_rdev_by_wiphy_idx(
  87                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
  88
  89         if (attrs[NL80211_ATTR_IFINDEX]) {
  90                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  91                 netdev = dev_get_by_index(netns, ifindex);
  92                 if (netdev) {
  93                         if (netdev->ieee80211_ptr)
  94                                 tmp = wiphy_to_dev(
  95                                                 netdev->ieee80211_ptr->wiphy);
  96                         else
  97                                 tmp = NULL;
  98
  99                         dev_put(netdev);
 100
 101                         /* not wireless device -- return error */
 102                         if (!tmp)
 103                                 return ERR_PTR(-EINVAL);
 104
 105                         /* mismatch -- return error */
 106                         if (rdev && tmp != rdev)
 107                                 return ERR_PTR(-EINVAL);
 108
 109                         rdev = tmp;
 110                 }
 111         }
 112
 113         if (!rdev)
 114                 return ERR_PTR(-ENODEV);
 115
 116         if (netns != wiphy_net(&rdev->wiphy))
 117                 return ERR_PTR(-ENODEV);
 118
 119         return rdev;
 120 }
 121
 122 /*
 123  * This function returns a pointer to the driver
 124  * that the genl_info item that is passed refers to.
 125  * If successful, it returns non-NULL and also locks
 126  * the driver's mutex!
 127  *
 128  * This means that you need to call cfg80211_unlock_rdev()
 129  * before being allowed to acquire &cfg80211_mutex!
 130  *
 131  * This is necessary because we need to lock the global
 132  * mutex to get an item off the list safely, and then
 133  * we lock the rdev mutex so it doesn't go away under us.
 134  *
 135  * We don't want to keep cfg80211_mutex locked
 136  * for all the time in order to allow requests on
 137  * other interfaces to go through at the same time.
 138  *
 139  * The result of this can be a PTR_ERR and hence must
 140  * be checked with IS_ERR() for errors.
 141  */
 142 static struct cfg80211_registered_device *
 143 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 144 {
 145         struct cfg80211_registered_device *rdev;
 146
 147         mutex_lock(&cfg80211_mutex);
 148         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 149
 150         /* if it is not an error we grab the lock on
 151          * it to assure it won't be going away while
 152          * we operate on it */
 153         if (!IS_ERR(rdev))
 154                 mutex_lock(&rdev->mtx);
 155
 156         mutex_unlock(&cfg80211_mutex);
 157
 158         return rdev;
 159 }
 160
 161 /* policy for the attributes */
 162 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 163         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 164         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 165                                       .len = 20-1 },
 166         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 167         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 168         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 169         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 170         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 171         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 172         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 173         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 174
 175         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 176         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 177         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 178
 179         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 180         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 181
 182         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 183         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 184                                     .len = WLAN_MAX_KEY_LEN },
 185         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 186         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 187         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 188         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 189         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 190
 191         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 192         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 193         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 194                                        .len = IEEE80211_MAX_DATA_LEN },
 195         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 196                                        .len = IEEE80211_MAX_DATA_LEN },
 197         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 198         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 199         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 200         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 201                                                .len = NL80211_MAX_SUPP_RATES },
 202         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 203         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 204         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 205         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 206                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 207         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 208
 209         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 210         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 211
 212         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 213         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 214         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 215         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 216                                            .len = NL80211_MAX_SUPP_RATES },
 217         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 218
 219         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 220         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 221
 222         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 223
 224         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 225         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 226                               .len = IEEE80211_MAX_DATA_LEN },
 227         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 228         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 229
 230         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 231                                 .len = IEEE80211_MAX_SSID_LEN },
 232         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 233         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 234         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 235         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 236         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 237         [NL80211_ATTR_STA_FLAGS2] = {
 238                 .len = sizeof(struct nl80211_sta_flag_update),
 239         },
 240         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 241         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 242         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 243         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 244         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 245         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 246         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 247         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 248         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 249                                  .len = WLAN_PMKID_LEN },
 250         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 251         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 252         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 253         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 254                                  .len = IEEE80211_MAX_DATA_LEN },
 255         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 256         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 257         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 258         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 259         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 260         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 261         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 262         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 263         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 264         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 265         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 266         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 267         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 268         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 269         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 270         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 271         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 272         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 273         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 274         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 275                                          .len = IEEE80211_MAX_DATA_LEN },
 276         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 277                                          .len = IEEE80211_MAX_DATA_LEN },
 278         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 279         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 280         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 281         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 282         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 283         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 284         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 285         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 286         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 287         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 288                                       .len = IEEE80211_MAX_DATA_LEN },
 289         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 290         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 291         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 292                 .len = NL80211_HT_CAPABILITY_LEN
 293         },
 294         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 295         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 296         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 297 };
 298
 299 /* policy for the key attributes */
 300 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 301         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 302         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 303         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 304         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 305         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 306         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 307         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 308         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 309 };
 310
 311 /* policy for the key default flags */
 312 static const struct nla_policy
 313 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 314         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 315         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 316 };
 317
 318 /* policy for WoWLAN attributes */
 319 static const struct nla_policy
 320 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 321         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 322         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 323         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 324         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 325         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 326         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 327         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 328         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 329 };
 330
 331 /* policy for GTK rekey offload attributes */
 332 static const struct nla_policy
 333 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 334         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 335         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 336         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 337 };
 338
 339 static const struct nla_policy
 340 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 341         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 342                                                  .len = IEEE80211_MAX_SSID_LEN },
 343         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 344 };
 345
 346 /* ifidx get helper */
 347 static int nl80211_get_ifidx(struct netlink_callback *cb)
 348 {
 349         int res;
 350
 351         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 352                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 353                           nl80211_policy);
 354         if (res)
 355                 return res;
 356
 357         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 358                 return -EINVAL;
 359
 360         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 361         if (!res)
 362                 return -EINVAL;
 363         return res;
 364 }
 365
 366 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 367                                        struct netlink_callback *cb,
 368                                        struct cfg80211_registered_device **rdev,
 369                                        struct net_device **dev)
 370 {
 371         int ifidx = cb->args[0];
 372         int err;
 373
 374         if (!ifidx)
 375                 ifidx = nl80211_get_ifidx(cb);
 376         if (ifidx < 0)
 377                 return ifidx;
 378
 379         cb->args[0] = ifidx;
 380
 381         rtnl_lock();
 382
 383         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 384         if (!*dev) {
 385                 err = -ENODEV;
 386                 goto out_rtnl;
 387         }
 388
 389         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 390         if (IS_ERR(*rdev)) {
 391                 err = PTR_ERR(*rdev);
 392                 goto out_rtnl;
 393         }
 394
 395         return 0;
 396  out_rtnl:
 397         rtnl_unlock();
 398         return err;
 399 }
 400
 401 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 402 {
 403         cfg80211_unlock_rdev(rdev);
 404         rtnl_unlock();
 405 }
 406
 407 /* IE validation */
 408 static bool is_valid_ie_attr(const struct nlattr *attr)
 409 {
 410         const u8 *pos;
 411         int len;
 412
 413         if (!attr)
 414                 return true;
 415
 416         pos = nla_data(attr);
 417         len = nla_len(attr);
 418
 419         while (len) {
 420                 u8 elemlen;
 421
 422                 if (len < 2)
 423                         return false;
 424                 len -= 2;
 425
 426                 elemlen = pos[1];
 427                 if (elemlen > len)
 428                         return false;
 429
 430                 len -= elemlen;
 431                 pos += 2 + elemlen;
 432         }
 433
 434         return true;
 435 }
 436
 437 /* message building helper */
 438 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 439                                    int flags, u8 cmd)
 440 {
 441         /* since there is no private header just add the generic one */
 442         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 443 }
 444
 445 static int nl80211_msg_put_channel(struct sk_buff *msg,
 446                                    struct ieee80211_channel *chan)
 447 {
 448         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 449                         chan->center_freq))
 450                 goto nla_put_failure;
 451
 452         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 453             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 454                 goto nla_put_failure;
 455         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 456             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 457                 goto nla_put_failure;
 458         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 459             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 460                 goto nla_put_failure;
 461         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 462             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 463                 goto nla_put_failure;
 464
 465         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 466                         DBM_TO_MBM(chan->max_power)))
 467                 goto nla_put_failure;
 468
 469         return 0;
 470
 471  nla_put_failure:
 472         return -ENOBUFS;
 473 }
 474
 475 /* netlink command implementations */
 476
 477 struct key_parse {
 478         struct key_params p;
 479         int idx;
 480         int type;
 481         bool def, defmgmt;
 482         bool def_uni, def_multi;
 483 };
 484
 485 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 486 {
 487         struct nlattr *tb[NL80211_KEY_MAX + 1];
 488         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 489                                    nl80211_key_policy);
 490         if (err)
 491                 return err;
 492
 493         k->def = !!tb[NL80211_KEY_DEFAULT];
 494         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 495
 496         if (k->def) {
 497                 k->def_uni = true;
 498                 k->def_multi = true;
 499         }
 500         if (k->defmgmt)
 501                 k->def_multi = true;
 502
 503         if (tb[NL80211_KEY_IDX])
 504                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 505
 506         if (tb[NL80211_KEY_DATA]) {
 507                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 508                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 509         }
 510
 511         if (tb[NL80211_KEY_SEQ]) {
 512                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 513                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 514         }
 515
 516         if (tb[NL80211_KEY_CIPHER])
 517                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 518
 519         if (tb[NL80211_KEY_TYPE]) {
 520                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 521                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 522                         return -EINVAL;
 523         }
 524
 525         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 526                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 527                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 528                                        tb[NL80211_KEY_DEFAULT_TYPES],
 529                                        nl80211_key_default_policy);
 530                 if (err)
 531                         return err;
 532
 533                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 534                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 535         }
 536
 537         return 0;
 538 }
 539
 540 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 541 {
 542         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 543                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 544                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 545         }
 546
 547         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 548                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 549                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 550         }
 551
 552         if (info->attrs[NL80211_ATTR_KEY_IDX])
 553                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 554
 555         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 556                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 557
 558         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 559         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 560
 561         if (k->def) {
 562                 k->def_uni = true;
 563                 k->def_multi = true;
 564         }
 565         if (k->defmgmt)
 566                 k->def_multi = true;
 567
 568         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 569                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 570                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 571                         return -EINVAL;
 572         }
 573
 574         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 575                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 576                 int err = nla_parse_nested(
 577                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 578                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 579                                 nl80211_key_default_policy);
 580                 if (err)
 581                         return err;
 582
 583                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 584                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 585         }
 586
 587         return 0;
 588 }
 589
 590 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 591 {
 592         int err;
 593
 594         memset(k, 0, sizeof(*k));
 595         k->idx = -1;
 596         k->type = -1;
 597
 598         if (info->attrs[NL80211_ATTR_KEY])
 599                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 600         else
 601                 err = nl80211_parse_key_old(info, k);
 602
 603         if (err)
 604                 return err;
 605
 606         if (k->def && k->defmgmt)
 607                 return -EINVAL;
 608
 609         if (k->defmgmt) {
 610                 if (k->def_uni || !k->def_multi)
 611                         return -EINVAL;
 612         }
 613
 614         if (k->idx != -1) {
 615                 if (k->defmgmt) {
 616                         if (k->idx < 4 || k->idx > 5)
 617                                 return -EINVAL;
 618                 } else if (k->def) {
 619                         if (k->idx < 0 || k->idx > 3)
 620                                 return -EINVAL;
 621                 } else {
 622                         if (k->idx < 0 || k->idx > 5)
 623                                 return -EINVAL;
 624                 }
 625         }
 626
 627         return 0;
 628 }
 629
 630 static struct cfg80211_cached_keys *
 631 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 632                        struct nlattr *keys)
 633 {
 634         struct key_parse parse;
 635         struct nlattr *key;
 636         struct cfg80211_cached_keys *result;
 637         int rem, err, def = 0;
 638
 639         result = kzalloc(sizeof(*result), GFP_KERNEL);
 640         if (!result)
 641                 return ERR_PTR(-ENOMEM);
 642
 643         result->def = -1;
 644         result->defmgmt = -1;
 645
 646         nla_for_each_nested(key, keys, rem) {
 647                 memset(&parse, 0, sizeof(parse));
 648                 parse.idx = -1;
 649
 650                 err = nl80211_parse_key_new(key, &parse);
 651                 if (err)
 652                         goto error;
 653                 err = -EINVAL;
 654                 if (!parse.p.key)
 655                         goto error;
 656                 if (parse.idx < 0 || parse.idx > 4)
 657                         goto error;
 658                 if (parse.def) {
 659                         if (def)
 660                                 goto error;
 661                         def = 1;
 662                         result->def = parse.idx;
 663                         if (!parse.def_uni || !parse.def_multi)
 664                                 goto error;
 665                 } else if (parse.defmgmt)
 666                         goto error;
 667                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 668                                                      parse.idx, false, NULL);
 669                 if (err)
 670                         goto error;
 671                 result->params[parse.idx].cipher = parse.p.cipher;
 672                 result->params[parse.idx].key_len = parse.p.key_len;
 673                 result->params[parse.idx].key = result->data[parse.idx];
 674                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 675         }
 676
 677         return result;
 678  error:
 679         kfree(result);
 680         return ERR_PTR(err);
 681 }
 682
 683 static int nl80211_key_allowed(struct wireless_dev *wdev)
 684 {
 685         ASSERT_WDEV_LOCK(wdev);
 686
 687         switch (wdev->iftype) {
 688         case NL80211_IFTYPE_AP:
 689         case NL80211_IFTYPE_AP_VLAN:
 690         case NL80211_IFTYPE_P2P_GO:
 691         case NL80211_IFTYPE_MESH_POINT:
 692                 break;
 693         case NL80211_IFTYPE_ADHOC:
 694                 if (!wdev->current_bss)
 695                         return -ENOLINK;
 696                 break;
 697         case NL80211_IFTYPE_STATION:
 698         case NL80211_IFTYPE_P2P_CLIENT:
 699                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 700                         return -ENOLINK;
 701                 break;
 702         default:
 703                 return -EINVAL;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 710 {
 711         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 712         int i;
 713
 714         if (!nl_modes)
 715                 goto nla_put_failure;
 716
 717         i = 0;
 718         while (ifmodes) {
 719                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 720                         goto nla_put_failure;
 721                 ifmodes >>= 1;
 722                 i++;
 723         }
 724
 725         nla_nest_end(msg, nl_modes);
 726         return 0;
 727
 728 nla_put_failure:
 729         return -ENOBUFS;
 730 }
 731
 732 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 733                                           struct sk_buff *msg)
 734 {
 735         struct nlattr *nl_combis;
 736         int i, j;
 737
 738         nl_combis = nla_nest_start(msg,
 739                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 740         if (!nl_combis)
 741                 goto nla_put_failure;
 742
 743         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 744                 const struct ieee80211_iface_combination *c;
 745                 struct nlattr *nl_combi, *nl_limits;
 746
 747                 c = &wiphy->iface_combinations[i];
 748
 749                 nl_combi = nla_nest_start(msg, i + 1);
 750                 if (!nl_combi)
 751                         goto nla_put_failure;
 752
 753                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 754                 if (!nl_limits)
 755                         goto nla_put_failure;
 756
 757                 for (j = 0; j < c->n_limits; j++) {
 758                         struct nlattr *nl_limit;
 759
 760                         nl_limit = nla_nest_start(msg, j + 1);
 761                         if (!nl_limit)
 762                                 goto nla_put_failure;
 763                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 764                                         c->limits[j].max))
 765                                 goto nla_put_failure;
 766                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 767                                                 c->limits[j].types))
 768                                 goto nla_put_failure;
 769                         nla_nest_end(msg, nl_limit);
 770                 }
 771
 772                 nla_nest_end(msg, nl_limits);
 773
 774                 if (c->beacon_int_infra_match &&
 775                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 776                         goto nla_put_failure;
 777                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 778                                 c->num_different_channels) ||
 779                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 780                                 c->max_interfaces))
 781                         goto nla_put_failure;
 782
 783                 nla_nest_end(msg, nl_combi);
 784         }
 785
 786         nla_nest_end(msg, nl_combis);
 787
 788         return 0;
 789 nla_put_failure:
 790         return -ENOBUFS;
 791 }
 792
 793 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 794                               struct cfg80211_registered_device *dev)
 795 {
 796         void *hdr;
 797         struct nlattr *nl_bands, *nl_band;
 798         struct nlattr *nl_freqs, *nl_freq;
 799         struct nlattr *nl_rates, *nl_rate;
 800         struct nlattr *nl_cmds;
 801         enum ieee80211_band band;
 802         struct ieee80211_channel *chan;
 803         struct ieee80211_rate *rate;
 804         int i;
 805         const struct ieee80211_txrx_stypes *mgmt_stypes =
 806                                 dev->wiphy.mgmt_stypes;
 807
 808         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 809         if (!hdr)
 810                 return -1;
 811
 812         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 813             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 814             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 815                         cfg80211_rdev_list_generation) ||
 816             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 817                        dev->wiphy.retry_short) ||
 818             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 819                        dev->wiphy.retry_long) ||
 820             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 821                         dev->wiphy.frag_threshold) ||
 822             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 823                         dev->wiphy.rts_threshold) ||
 824             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 825                        dev->wiphy.coverage_class) ||
 826             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 827                        dev->wiphy.max_scan_ssids) ||
 828             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 829                        dev->wiphy.max_sched_scan_ssids) ||
 830             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 831                         dev->wiphy.max_scan_ie_len) ||
 832             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 833                         dev->wiphy.max_sched_scan_ie_len) ||
 834             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 835                        dev->wiphy.max_match_sets))
 836                 goto nla_put_failure;
 837
 838         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 839             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 840                 goto nla_put_failure;
 841         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 842             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 843                 goto nla_put_failure;
 844         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 845             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 846                 goto nla_put_failure;
 847         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 848             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 849                 goto nla_put_failure;
 850         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 851             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 852                 goto nla_put_failure;
 853         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 854             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 855                 goto nla_put_failure;
 856
 857         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 858                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 859                     dev->wiphy.cipher_suites))
 860                 goto nla_put_failure;
 861
 862         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 863                        dev->wiphy.max_num_pmkids))
 864                 goto nla_put_failure;
 865
 866         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 867             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 868                 goto nla_put_failure;
 869
 870         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 871                         dev->wiphy.available_antennas_tx) ||
 872             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 873                         dev->wiphy.available_antennas_rx))
 874                 goto nla_put_failure;
 875
 876         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 877             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 878                         dev->wiphy.probe_resp_offload))
 879                 goto nla_put_failure;
 880
 881         if ((dev->wiphy.available_antennas_tx ||
 882              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 883                 u32 tx_ant = 0, rx_ant = 0;
 884                 int res;
 885                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 886                 if (!res) {
 887                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 888                                         tx_ant) ||
 889                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 890                                         rx_ant))
 891                                 goto nla_put_failure;
 892                 }
 893         }
 894
 895         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 896                                 dev->wiphy.interface_modes))
 897                 goto nla_put_failure;
 898
 899         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 900         if (!nl_bands)
 901                 goto nla_put_failure;
 902
 903         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 904                 if (!dev->wiphy.bands[band])
 905                         continue;
 906
 907                 nl_band = nla_nest_start(msg, band);
 908                 if (!nl_band)
 909                         goto nla_put_failure;
 910
 911                 /* add HT info */
 912                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 913                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 914                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 915                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 916                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 917                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 918                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 919                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 920                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 921                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 922                         goto nla_put_failure;
 923
 924                 /* add VHT info */
 925                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
 926                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
 927                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
 928                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
 929                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
 930                                  dev->wiphy.bands[band]->vht_cap.cap)))
 931                         goto nla_put_failure;
 932
 933                 /* add frequencies */
 934                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 935                 if (!nl_freqs)
 936                         goto nla_put_failure;
 937
 938                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 939                         nl_freq = nla_nest_start(msg, i);
 940                         if (!nl_freq)
 941                                 goto nla_put_failure;
 942
 943                         chan = &dev->wiphy.bands[band]->channels[i];
 944
 945                         if (nl80211_msg_put_channel(msg, chan))
 946                                 goto nla_put_failure;
 947
 948                         nla_nest_end(msg, nl_freq);
 949                 }
 950
 951                 nla_nest_end(msg, nl_freqs);
 952
 953                 /* add bitrates */
 954                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
 955                 if (!nl_rates)
 956                         goto nla_put_failure;
 957
 958                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
 959                         nl_rate = nla_nest_start(msg, i);
 960                         if (!nl_rate)
 961                                 goto nla_put_failure;
 962
 963                         rate = &dev->wiphy.bands[band]->bitrates[i];
 964                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
 965                                         rate->bitrate))
 966                                 goto nla_put_failure;
 967                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
 968                             nla_put_flag(msg,
 969                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
 970                                 goto nla_put_failure;
 971
 972                         nla_nest_end(msg, nl_rate);
 973                 }
 974
 975                 nla_nest_end(msg, nl_rates);
 976
 977                 nla_nest_end(msg, nl_band);
 978         }
 979         nla_nest_end(msg, nl_bands);
 980
 981         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
 982         if (!nl_cmds)
 983                 goto nla_put_failure;
 984
 985         i = 0;
 986 #define CMD(op, n)                                              \
 987          do {                                                   \
 988                 if (dev->ops->op) {                             \
 989                         i++;                                    \
 990                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
 991                                 goto nla_put_failure;           \
 992                 }                                               \
 993         } while (0)
 994
 995         CMD(add_virtual_intf, NEW_INTERFACE);
 996         CMD(change_virtual_intf, SET_INTERFACE);
 997         CMD(add_key, NEW_KEY);
 998         CMD(start_ap, START_AP);
 999         CMD(add_station, NEW_STATION);
1000         CMD(add_mpath, NEW_MPATH);
1001         CMD(update_mesh_config, SET_MESH_CONFIG);
1002         CMD(change_bss, SET_BSS);
1003         CMD(auth, AUTHENTICATE);
1004         CMD(assoc, ASSOCIATE);
1005         CMD(deauth, DEAUTHENTICATE);
1006         CMD(disassoc, DISASSOCIATE);
1007         CMD(join_ibss, JOIN_IBSS);
1008         CMD(join_mesh, JOIN_MESH);
1009         CMD(set_pmksa, SET_PMKSA);
1010         CMD(del_pmksa, DEL_PMKSA);
1011         CMD(flush_pmksa, FLUSH_PMKSA);
1012         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1013                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1014         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1015         CMD(mgmt_tx, FRAME);
1016         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1017         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1018                 i++;
1019                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1020                         goto nla_put_failure;
1021         }
1022         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1023             dev->ops->join_mesh) {
1024                 i++;
1025                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1026                         goto nla_put_failure;
1027         }
1028         CMD(set_wds_peer, SET_WDS_PEER);
1029         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1030                 CMD(tdls_mgmt, TDLS_MGMT);
1031                 CMD(tdls_oper, TDLS_OPER);
1032         }
1033         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1034                 CMD(sched_scan_start, START_SCHED_SCAN);
1035         CMD(probe_client, PROBE_CLIENT);
1036         CMD(set_noack_map, SET_NOACK_MAP);
1037         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1038                 i++;
1039                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1040                         goto nla_put_failure;
1041         }
1042
1043 #ifdef CONFIG_NL80211_TESTMODE
1044         CMD(testmode_cmd, TESTMODE);
1045 #endif
1046
1047 #undef CMD
1048
1049         if (dev->ops->connect || dev->ops->auth) {
1050                 i++;
1051                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1052                         goto nla_put_failure;
1053         }
1054
1055         if (dev->ops->disconnect || dev->ops->deauth) {
1056                 i++;
1057                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1058                         goto nla_put_failure;
1059         }
1060
1061         nla_nest_end(msg, nl_cmds);
1062
1063         if (dev->ops->remain_on_channel &&
1064             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1065             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1066                         dev->wiphy.max_remain_on_channel_duration))
1067                 goto nla_put_failure;
1068
1069         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1070             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1071                 goto nla_put_failure;
1072
1073         if (mgmt_stypes) {
1074                 u16 stypes;
1075                 struct nlattr *nl_ftypes, *nl_ifs;
1076                 enum nl80211_iftype ift;
1077
1078                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1079                 if (!nl_ifs)
1080                         goto nla_put_failure;
1081
1082                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1083                         nl_ftypes = nla_nest_start(msg, ift);
1084                         if (!nl_ftypes)
1085                                 goto nla_put_failure;
1086                         i = 0;
1087                         stypes = mgmt_stypes[ift].tx;
1088                         while (stypes) {
1089                                 if ((stypes & 1) &&
1090                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1091                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1092                                         goto nla_put_failure;
1093                                 stypes >>= 1;
1094                                 i++;
1095                         }
1096                         nla_nest_end(msg, nl_ftypes);
1097                 }
1098
1099                 nla_nest_end(msg, nl_ifs);
1100
1101                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1102                 if (!nl_ifs)
1103                         goto nla_put_failure;
1104
1105                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1106                         nl_ftypes = nla_nest_start(msg, ift);
1107                         if (!nl_ftypes)
1108                                 goto nla_put_failure;
1109                         i = 0;
1110                         stypes = mgmt_stypes[ift].rx;
1111                         while (stypes) {
1112                                 if ((stypes & 1) &&
1113                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1114                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1115                                         goto nla_put_failure;
1116                                 stypes >>= 1;
1117                                 i++;
1118                         }
1119                         nla_nest_end(msg, nl_ftypes);
1120                 }
1121                 nla_nest_end(msg, nl_ifs);
1122         }
1123
1124 #ifdef CONFIG_PM
1125         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1126                 struct nlattr *nl_wowlan;
1127
1128                 nl_wowlan = nla_nest_start(msg,
1129                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1130                 if (!nl_wowlan)
1131                         goto nla_put_failure;
1132
1133                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1134                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1135                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1136                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1137                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1138                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1139                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1140                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1141                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1142                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1143                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1144                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1145                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1146                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1147                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1148                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1149                     goto nla_put_failure;
1150                 if (dev->wiphy.wowlan.n_patterns) {
1151                         struct nl80211_wowlan_pattern_support pat = {
1152                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1153                                 .min_pattern_len =
1154                                         dev->wiphy.wowlan.pattern_min_len,
1155                                 .max_pattern_len =
1156                                         dev->wiphy.wowlan.pattern_max_len,
1157                         };
1158                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1159                                     sizeof(pat), &pat))
1160                                 goto nla_put_failure;
1161                 }
1162
1163                 nla_nest_end(msg, nl_wowlan);
1164         }
1165 #endif
1166
1167         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1168                                 dev->wiphy.software_iftypes))
1169                 goto nla_put_failure;
1170
1171         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1172                 goto nla_put_failure;
1173
1174         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1175             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1176                         dev->wiphy.ap_sme_capa))
1177                 goto nla_put_failure;
1178
1179         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1180                         dev->wiphy.features))
1181                 goto nla_put_failure;
1182
1183         if (dev->wiphy.ht_capa_mod_mask &&
1184             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1185                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1186                     dev->wiphy.ht_capa_mod_mask))
1187                 goto nla_put_failure;
1188
1189         return genlmsg_end(msg, hdr);
1190
1191  nla_put_failure:
1192         genlmsg_cancel(msg, hdr);
1193         return -EMSGSIZE;
1194 }
1195
1196 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1197 {
1198         int idx = 0;
1199         int start = cb->args[0];
1200         struct cfg80211_registered_device *dev;
1201
1202         mutex_lock(&cfg80211_mutex);
1203         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1204                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1205                         continue;
1206                 if (++idx <= start)
1207                         continue;
1208                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1209                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1210                                        dev) < 0) {
1211                         idx--;
1212                         break;
1213                 }
1214         }
1215         mutex_unlock(&cfg80211_mutex);
1216
1217         cb->args[0] = idx;
1218
1219         return skb->len;
1220 }
1221
1222 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1223 {
1224         struct sk_buff *msg;
1225         struct cfg80211_registered_device *dev = info->user_ptr[0];
1226
1227         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1228         if (!msg)
1229                 return -ENOMEM;
1230
1231         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1232                 nlmsg_free(msg);
1233                 return -ENOBUFS;
1234         }
1235
1236         return genlmsg_reply(msg, info);
1237 }
1238
1239 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1240         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1241         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1242         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1243         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1244         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1245 };
1246
1247 static int parse_txq_params(struct nlattr *tb[],
1248                             struct ieee80211_txq_params *txq_params)
1249 {
1250         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1251             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1252             !tb[NL80211_TXQ_ATTR_AIFS])
1253                 return -EINVAL;
1254
1255         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1256         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1257         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1258         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1259         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1260
1261         if (txq_params->ac >= NL80211_NUM_ACS)
1262                 return -EINVAL;
1263
1264         return 0;
1265 }
1266
1267 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1268 {
1269         /*
1270          * You can only set the channel explicitly for WDS interfaces,
1271          * all others have their channel managed via their respective
1272          * "establish a connection" command (connect, join, ...)
1273          *
1274          * For AP/GO and mesh mode, the channel can be set with the
1275          * channel userspace API, but is only stored and passed to the
1276          * low-level driver when the AP starts or the mesh is joined.
1277          * This is for backward compatibility, userspace can also give
1278          * the channel in the start-ap or join-mesh commands instead.
1279          *
1280          * Monitors are special as they are normally slaved to
1281          * whatever else is going on, so they have their own special
1282          * operation to set the monitor channel if possible.
1283          */
1284         return !wdev ||
1285                 wdev->iftype == NL80211_IFTYPE_AP ||
1286                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1287                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1288                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1289 }
1290
1291 static bool nl80211_valid_channel_type(struct genl_info *info,
1292                                        enum nl80211_channel_type *channel_type)
1293 {
1294         enum nl80211_channel_type tmp;
1295
1296         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1297                 return false;
1298
1299         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1300         if (tmp != NL80211_CHAN_NO_HT &&
1301             tmp != NL80211_CHAN_HT20 &&
1302             tmp != NL80211_CHAN_HT40PLUS &&
1303             tmp != NL80211_CHAN_HT40MINUS)
1304                 return false;
1305
1306         if (channel_type)
1307                 *channel_type = tmp;
1308
1309         return true;
1310 }
1311
1312 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1313                                  struct wireless_dev *wdev,
1314                                  struct genl_info *info)
1315 {
1316         struct ieee80211_channel *channel;
1317         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1318         u32 freq;
1319         int result;
1320         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1321
1322         if (wdev)
1323                 iftype = wdev->iftype;
1324
1325         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1326                 return -EINVAL;
1327
1328         if (!nl80211_can_set_dev_channel(wdev))
1329                 return -EOPNOTSUPP;
1330
1331         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1332             !nl80211_valid_channel_type(info, &channel_type))
1333                 return -EINVAL;
1334
1335         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1336
1337         mutex_lock(&rdev->devlist_mtx);
1338         switch (iftype) {
1339         case NL80211_IFTYPE_AP:
1340         case NL80211_IFTYPE_P2P_GO:
1341                 if (wdev->beacon_interval) {
1342                         result = -EBUSY;
1343                         break;
1344                 }
1345                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1346                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1347                                                               channel,
1348                                                               channel_type)) {
1349                         result = -EINVAL;
1350                         break;
1351                 }
1352                 wdev->preset_chan = channel;
1353                 wdev->preset_chantype = channel_type;
1354                 result = 0;
1355                 break;
1356         case NL80211_IFTYPE_MESH_POINT:
1357                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1358                 break;
1359         case NL80211_IFTYPE_MONITOR:
1360                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1361                 break;
1362         default:
1363                 result = -EINVAL;
1364         }
1365         mutex_unlock(&rdev->devlist_mtx);
1366
1367         return result;
1368 }
1369
1370 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1371 {
1372         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1373         struct net_device *netdev = info->user_ptr[1];
1374
1375         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1376 }
1377
1378 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1379 {
1380         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1381         struct net_device *dev = info->user_ptr[1];
1382         struct wireless_dev *wdev = dev->ieee80211_ptr;
1383         const u8 *bssid;
1384
1385         if (!info->attrs[NL80211_ATTR_MAC])
1386                 return -EINVAL;
1387
1388         if (netif_running(dev))
1389                 return -EBUSY;
1390
1391         if (!rdev->ops->set_wds_peer)
1392                 return -EOPNOTSUPP;
1393
1394         if (wdev->iftype != NL80211_IFTYPE_WDS)
1395                 return -EOPNOTSUPP;
1396
1397         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1398         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1399 }
1400
1401
1402 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1403 {
1404         struct cfg80211_registered_device *rdev;
1405         struct net_device *netdev = NULL;
1406         struct wireless_dev *wdev;
1407         int result = 0, rem_txq_params = 0;
1408         struct nlattr *nl_txq_params;
1409         u32 changed;
1410         u8 retry_short = 0, retry_long = 0;
1411         u32 frag_threshold = 0, rts_threshold = 0;
1412         u8 coverage_class = 0;
1413
1414         /*
1415          * Try to find the wiphy and netdev. Normally this
1416          * function shouldn't need the netdev, but this is
1417          * done for backward compatibility -- previously
1418          * setting the channel was done per wiphy, but now
1419          * it is per netdev. Previous userland like hostapd
1420          * also passed a netdev to set_wiphy, so that it is
1421          * possible to let that go to the right netdev!
1422          */
1423         mutex_lock(&cfg80211_mutex);
1424
1425         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1426                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1427
1428                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1429                 if (netdev && netdev->ieee80211_ptr) {
1430                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1431                         mutex_lock(&rdev->mtx);
1432                 } else
1433                         netdev = NULL;
1434         }
1435
1436         if (!netdev) {
1437                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1438                                                   info->attrs);
1439                 if (IS_ERR(rdev)) {
1440                         mutex_unlock(&cfg80211_mutex);
1441                         return PTR_ERR(rdev);
1442                 }
1443                 wdev = NULL;
1444                 netdev = NULL;
1445                 result = 0;
1446
1447                 mutex_lock(&rdev->mtx);
1448         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1449                 wdev = netdev->ieee80211_ptr;
1450         else
1451                 wdev = NULL;
1452
1453         /*
1454          * end workaround code, by now the rdev is available
1455          * and locked, and wdev may or may not be NULL.
1456          */
1457
1458         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1459                 result = cfg80211_dev_rename(
1460                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1461
1462         mutex_unlock(&cfg80211_mutex);
1463
1464         if (result)
1465                 goto bad_res;
1466
1467         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1468                 struct ieee80211_txq_params txq_params;
1469                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1470
1471                 if (!rdev->ops->set_txq_params) {
1472                         result = -EOPNOTSUPP;
1473                         goto bad_res;
1474                 }
1475
1476                 if (!netdev) {
1477                         result = -EINVAL;
1478                         goto bad_res;
1479                 }
1480
1481                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1482                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1483                         result = -EINVAL;
1484                         goto bad_res;
1485                 }
1486
1487                 if (!netif_running(netdev)) {
1488                         result = -ENETDOWN;
1489                         goto bad_res;
1490                 }
1491
1492                 nla_for_each_nested(nl_txq_params,
1493                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1494                                     rem_txq_params) {
1495                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1496                                   nla_data(nl_txq_params),
1497                                   nla_len(nl_txq_params),
1498                                   txq_params_policy);
1499                         result = parse_txq_params(tb, &txq_params);
1500                         if (result)
1501                                 goto bad_res;
1502
1503                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1504                                                            netdev,
1505                                                            &txq_params);
1506                         if (result)
1507                                 goto bad_res;
1508                 }
1509         }
1510
1511         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1512                 result = __nl80211_set_channel(rdev, wdev, info);
1513                 if (result)
1514                         goto bad_res;
1515         }
1516
1517         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1518                 enum nl80211_tx_power_setting type;
1519                 int idx, mbm = 0;
1520
1521                 if (!rdev->ops->set_tx_power) {
1522                         result = -EOPNOTSUPP;
1523                         goto bad_res;
1524                 }
1525
1526                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1527                 type = nla_get_u32(info->attrs[idx]);
1528
1529                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1530                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1531                         result = -EINVAL;
1532                         goto bad_res;
1533                 }
1534
1535                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1536                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1537                         mbm = nla_get_u32(info->attrs[idx]);
1538                 }
1539
1540                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1541                 if (result)
1542                         goto bad_res;
1543         }
1544
1545         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1546             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1547                 u32 tx_ant, rx_ant;
1548                 if ((!rdev->wiphy.available_antennas_tx &&
1549                      !rdev->wiphy.available_antennas_rx) ||
1550                     !rdev->ops->set_antenna) {
1551                         result = -EOPNOTSUPP;
1552                         goto bad_res;
1553                 }
1554
1555                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1556                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1557
1558                 /* reject antenna configurations which don't match the
1559                  * available antenna masks, except for the "all" mask */
1560                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1561                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1562                         result = -EINVAL;
1563                         goto bad_res;
1564                 }
1565
1566                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1567                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1568
1569                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1570                 if (result)
1571                         goto bad_res;
1572         }
1573
1574         changed = 0;
1575
1576         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1577                 retry_short = nla_get_u8(
1578                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1579                 if (retry_short == 0) {
1580                         result = -EINVAL;
1581                         goto bad_res;
1582                 }
1583                 changed |= WIPHY_PARAM_RETRY_SHORT;
1584         }
1585
1586         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1587                 retry_long = nla_get_u8(
1588                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1589                 if (retry_long == 0) {
1590                         result = -EINVAL;
1591                         goto bad_res;
1592                 }
1593                 changed |= WIPHY_PARAM_RETRY_LONG;
1594         }
1595
1596         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1597                 frag_threshold = nla_get_u32(
1598                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1599                 if (frag_threshold < 256) {
1600                         result = -EINVAL;
1601                         goto bad_res;
1602                 }
1603                 if (frag_threshold != (u32) -1) {
1604                         /*
1605                          * Fragments (apart from the last one) are required to
1606                          * have even length. Make the fragmentation code
1607                          * simpler by stripping LSB should someone try to use
1608                          * odd threshold value.
1609                          */
1610                         frag_threshold &= ~0x1;
1611                 }
1612                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1613         }
1614
1615         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1616                 rts_threshold = nla_get_u32(
1617                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1618                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1619         }
1620
1621         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1622                 coverage_class = nla_get_u8(
1623                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1624                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1625         }
1626
1627         if (changed) {
1628                 u8 old_retry_short, old_retry_long;
1629                 u32 old_frag_threshold, old_rts_threshold;
1630                 u8 old_coverage_class;
1631
1632                 if (!rdev->ops->set_wiphy_params) {
1633                         result = -EOPNOTSUPP;
1634                         goto bad_res;
1635                 }
1636
1637                 old_retry_short = rdev->wiphy.retry_short;
1638                 old_retry_long = rdev->wiphy.retry_long;
1639                 old_frag_threshold = rdev->wiphy.frag_threshold;
1640                 old_rts_threshold = rdev->wiphy.rts_threshold;
1641                 old_coverage_class = rdev->wiphy.coverage_class;
1642
1643                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1644                         rdev->wiphy.retry_short = retry_short;
1645                 if (changed & WIPHY_PARAM_RETRY_LONG)
1646                         rdev->wiphy.retry_long = retry_long;
1647                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1648                         rdev->wiphy.frag_threshold = frag_threshold;
1649                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1650                         rdev->wiphy.rts_threshold = rts_threshold;
1651                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1652                         rdev->wiphy.coverage_class = coverage_class;
1653
1654                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1655                 if (result) {
1656                         rdev->wiphy.retry_short = old_retry_short;
1657                         rdev->wiphy.retry_long = old_retry_long;
1658                         rdev->wiphy.frag_threshold = old_frag_threshold;
1659                         rdev->wiphy.rts_threshold = old_rts_threshold;
1660                         rdev->wiphy.coverage_class = old_coverage_class;
1661                 }
1662         }
1663
1664  bad_res:
1665         mutex_unlock(&rdev->mtx);
1666         if (netdev)
1667                 dev_put(netdev);
1668         return result;
1669 }
1670
1671
1672 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1673                               struct cfg80211_registered_device *rdev,
1674                               struct net_device *dev)
1675 {
1676         void *hdr;
1677
1678         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1679         if (!hdr)
1680                 return -1;
1681
1682         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1683             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1684             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1685             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1686                         dev->ieee80211_ptr->iftype) ||
1687             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1688                         rdev->devlist_generation ^
1689                         (cfg80211_rdev_list_generation << 2)))
1690                 goto nla_put_failure;
1691
1692         if (rdev->ops->get_channel) {
1693                 struct ieee80211_channel *chan;
1694                 enum nl80211_channel_type channel_type;
1695
1696                 chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
1697                 if (chan &&
1698                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1699                                     chan->center_freq) ||
1700                      nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1701                                     channel_type)))
1702                         goto nla_put_failure;
1703         }
1704
1705         return genlmsg_end(msg, hdr);
1706
1707  nla_put_failure:
1708         genlmsg_cancel(msg, hdr);
1709         return -EMSGSIZE;
1710 }
1711
1712 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1713 {
1714         int wp_idx = 0;
1715         int if_idx = 0;
1716         int wp_start = cb->args[0];
1717         int if_start = cb->args[1];
1718         struct cfg80211_registered_device *rdev;
1719         struct wireless_dev *wdev;
1720
1721         mutex_lock(&cfg80211_mutex);
1722         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1723                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1724                         continue;
1725                 if (wp_idx < wp_start) {
1726                         wp_idx++;
1727                         continue;
1728                 }
1729                 if_idx = 0;
1730
1731                 mutex_lock(&rdev->devlist_mtx);
1732                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1733                         if (if_idx < if_start) {
1734                                 if_idx++;
1735                                 continue;
1736                         }
1737                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1738                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1739                                                rdev, wdev->netdev) < 0) {
1740                                 mutex_unlock(&rdev->devlist_mtx);
1741                                 goto out;
1742                         }
1743                         if_idx++;
1744                 }
1745                 mutex_unlock(&rdev->devlist_mtx);
1746
1747                 wp_idx++;
1748         }
1749  out:
1750         mutex_unlock(&cfg80211_mutex);
1751
1752         cb->args[0] = wp_idx;
1753         cb->args[1] = if_idx;
1754
1755         return skb->len;
1756 }
1757
1758 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1759 {
1760         struct sk_buff *msg;
1761         struct cfg80211_registered_device *dev = info->user_ptr[0];
1762         struct net_device *netdev = info->user_ptr[1];
1763
1764         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1765         if (!msg)
1766                 return -ENOMEM;
1767
1768         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1769                                dev, netdev) < 0) {
1770                 nlmsg_free(msg);
1771                 return -ENOBUFS;
1772         }
1773
1774         return genlmsg_reply(msg, info);
1775 }
1776
1777 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1778         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1779         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1780         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1781         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1782         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1783 };
1784
1785 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1786 {
1787         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1788         int flag;
1789
1790         *mntrflags = 0;
1791
1792         if (!nla)
1793                 return -EINVAL;
1794
1795         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1796                              nla, mntr_flags_policy))
1797                 return -EINVAL;
1798
1799         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1800                 if (flags[flag])
1801                         *mntrflags |= (1<<flag);
1802
1803         return 0;
1804 }
1805
1806 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1807                                struct net_device *netdev, u8 use_4addr,
1808                                enum nl80211_iftype iftype)
1809 {
1810         if (!use_4addr) {
1811                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1812                         return -EBUSY;
1813                 return 0;
1814         }
1815
1816         switch (iftype) {
1817         case NL80211_IFTYPE_AP_VLAN:
1818                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1819                         return 0;
1820                 break;
1821         case NL80211_IFTYPE_STATION:
1822                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1823                         return 0;
1824                 break;
1825         default:
1826                 break;
1827         }
1828
1829         return -EOPNOTSUPP;
1830 }
1831
1832 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1833 {
1834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1835         struct vif_params params;
1836         int err;
1837         enum nl80211_iftype otype, ntype;
1838         struct net_device *dev = info->user_ptr[1];
1839         u32 _flags, *flags = NULL;
1840         bool change = false;
1841
1842         memset(&params, 0, sizeof(params));
1843
1844         otype = ntype = dev->ieee80211_ptr->iftype;
1845
1846         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1847                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1848                 if (otype != ntype)
1849                         change = true;
1850                 if (ntype > NL80211_IFTYPE_MAX)
1851                         return -EINVAL;
1852         }
1853
1854         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1855                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1856
1857                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1858                         return -EINVAL;
1859                 if (netif_running(dev))
1860                         return -EBUSY;
1861
1862                 wdev_lock(wdev);
1863                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1864                              IEEE80211_MAX_MESH_ID_LEN);
1865                 wdev->mesh_id_up_len =
1866                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1867                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1868                        wdev->mesh_id_up_len);
1869                 wdev_unlock(wdev);
1870         }
1871
1872         if (info->attrs[NL80211_ATTR_4ADDR]) {
1873                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1874                 change = true;
1875                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1876                 if (err)
1877                         return err;
1878         } else {
1879                 params.use_4addr = -1;
1880         }
1881
1882         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1883                 if (ntype != NL80211_IFTYPE_MONITOR)
1884                         return -EINVAL;
1885                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1886                                           &_flags);
1887                 if (err)
1888                         return err;
1889
1890                 flags = &_flags;
1891                 change = true;
1892         }
1893
1894         if (change)
1895                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1896         else
1897                 err = 0;
1898
1899         if (!err && params.use_4addr != -1)
1900                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1901
1902         return err;
1903 }
1904
1905 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1906 {
1907         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1908         struct vif_params params;
1909         struct net_device *dev;
1910         int err;
1911         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1912         u32 flags;
1913
1914         memset(&params, 0, sizeof(params));
1915
1916         if (!info->attrs[NL80211_ATTR_IFNAME])
1917                 return -EINVAL;
1918
1919         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1920                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1921                 if (type > NL80211_IFTYPE_MAX)
1922                         return -EINVAL;
1923         }
1924
1925         if (!rdev->ops->add_virtual_intf ||
1926             !(rdev->wiphy.interface_modes & (1 << type)))
1927                 return -EOPNOTSUPP;
1928
1929         if (info->attrs[NL80211_ATTR_4ADDR]) {
1930                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1931                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1932                 if (err)
1933                         return err;
1934         }
1935
1936         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1937                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1938                                   &flags);
1939         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1940                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1941                 type, err ? NULL : &flags, &params);
1942         if (IS_ERR(dev))
1943                 return PTR_ERR(dev);
1944
1945         if (type == NL80211_IFTYPE_MESH_POINT &&
1946             info->attrs[NL80211_ATTR_MESH_ID]) {
1947                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1948
1949                 wdev_lock(wdev);
1950                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1951                              IEEE80211_MAX_MESH_ID_LEN);
1952                 wdev->mesh_id_up_len =
1953                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1954                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1955                        wdev->mesh_id_up_len);
1956                 wdev_unlock(wdev);
1957         }
1958
1959         return 0;
1960 }
1961
1962 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1963 {
1964         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1965         struct net_device *dev = info->user_ptr[1];
1966
1967         if (!rdev->ops->del_virtual_intf)
1968                 return -EOPNOTSUPP;
1969
1970         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1971 }
1972
1973 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1974 {
1975         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1976         struct net_device *dev = info->user_ptr[1];
1977         u16 noack_map;
1978
1979         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1980                 return -EINVAL;
1981
1982         if (!rdev->ops->set_noack_map)
1983                 return -EOPNOTSUPP;
1984
1985         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1986
1987         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1988 }
1989
1990 struct get_key_cookie {
1991         struct sk_buff *msg;
1992         int error;
1993         int idx;
1994 };
1995
1996 static void get_key_callback(void *c, struct key_params *params)
1997 {
1998         struct nlattr *key;
1999         struct get_key_cookie *cookie = c;
2000
2001         if ((params->key &&
2002              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2003                      params->key_len, params->key)) ||
2004             (params->seq &&
2005              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2006                      params->seq_len, params->seq)) ||
2007             (params->cipher &&
2008              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2009                          params->cipher)))
2010                 goto nla_put_failure;
2011
2012         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2013         if (!key)
2014                 goto nla_put_failure;
2015
2016         if ((params->key &&
2017              nla_put(cookie->msg, NL80211_KEY_DATA,
2018                      params->key_len, params->key)) ||
2019             (params->seq &&
2020              nla_put(cookie->msg, NL80211_KEY_SEQ,
2021                      params->seq_len, params->seq)) ||
2022             (params->cipher &&
2023              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2024                          params->cipher)))
2025                 goto nla_put_failure;
2026
2027         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2028                 goto nla_put_failure;
2029
2030         nla_nest_end(cookie->msg, key);
2031
2032         return;
2033  nla_put_failure:
2034         cookie->error = 1;
2035 }
2036
2037 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2038 {
2039         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2040         int err;
2041         struct net_device *dev = info->user_ptr[1];
2042         u8 key_idx = 0;
2043         const u8 *mac_addr = NULL;
2044         bool pairwise;
2045         struct get_key_cookie cookie = {
2046                 .error = 0,
2047         };
2048         void *hdr;
2049         struct sk_buff *msg;
2050
2051         if (info->attrs[NL80211_ATTR_KEY_IDX])
2052                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2053
2054         if (key_idx > 5)
2055                 return -EINVAL;
2056
2057         if (info->attrs[NL80211_ATTR_MAC])
2058                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2059
2060         pairwise = !!mac_addr;
2061         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2062                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2063                 if (kt >= NUM_NL80211_KEYTYPES)
2064                         return -EINVAL;
2065                 if (kt != NL80211_KEYTYPE_GROUP &&
2066                     kt != NL80211_KEYTYPE_PAIRWISE)
2067                         return -EINVAL;
2068                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2069         }
2070
2071         if (!rdev->ops->get_key)
2072                 return -EOPNOTSUPP;
2073
2074         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2075         if (!msg)
2076                 return -ENOMEM;
2077
2078         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2079                              NL80211_CMD_NEW_KEY);
2080         if (IS_ERR(hdr))
2081                 return PTR_ERR(hdr);
2082
2083         cookie.msg = msg;
2084         cookie.idx = key_idx;
2085
2086         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2087             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2088                 goto nla_put_failure;
2089         if (mac_addr &&
2090             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2091                 goto nla_put_failure;
2092
2093         if (pairwise && mac_addr &&
2094             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2095                 return -ENOENT;
2096
2097         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2098                                  mac_addr, &cookie, get_key_callback);
2099
2100         if (err)
2101                 goto free_msg;
2102
2103         if (cookie.error)
2104                 goto nla_put_failure;
2105
2106         genlmsg_end(msg, hdr);
2107         return genlmsg_reply(msg, info);
2108
2109  nla_put_failure:
2110         err = -ENOBUFS;
2111  free_msg:
2112         nlmsg_free(msg);
2113         return err;
2114 }
2115
2116 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2117 {
2118         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2119         struct key_parse key;
2120         int err;
2121         struct net_device *dev = info->user_ptr[1];
2122
2123         err = nl80211_parse_key(info, &key);
2124         if (err)
2125                 return err;
2126
2127         if (key.idx < 0)
2128                 return -EINVAL;
2129
2130         /* only support setting default key */
2131         if (!key.def && !key.defmgmt)
2132                 return -EINVAL;
2133
2134         wdev_lock(dev->ieee80211_ptr);
2135
2136         if (key.def) {
2137                 if (!rdev->ops->set_default_key) {
2138                         err = -EOPNOTSUPP;
2139                         goto out;
2140                 }
2141
2142                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2143                 if (err)
2144                         goto out;
2145
2146                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2147                                                  key.def_uni, key.def_multi);
2148
2149                 if (err)
2150                         goto out;
2151
2152 #ifdef CONFIG_CFG80211_WEXT
2153                 dev->ieee80211_ptr->wext.default_key = key.idx;
2154 #endif
2155         } else {
2156                 if (key.def_uni || !key.def_multi) {
2157                         err = -EINVAL;
2158                         goto out;
2159                 }
2160
2161                 if (!rdev->ops->set_default_mgmt_key) {
2162                         err = -EOPNOTSUPP;
2163                         goto out;
2164                 }
2165
2166                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2167                 if (err)
2168                         goto out;
2169
2170                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2171                                                       dev, key.idx);
2172                 if (err)
2173                         goto out;
2174
2175 #ifdef CONFIG_CFG80211_WEXT
2176                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2177 #endif
2178         }
2179
2180  out:
2181         wdev_unlock(dev->ieee80211_ptr);
2182
2183         return err;
2184 }
2185
2186 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2187 {
2188         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2189         int err;
2190         struct net_device *dev = info->user_ptr[1];
2191         struct key_parse key;
2192         const u8 *mac_addr = NULL;
2193
2194         err = nl80211_parse_key(info, &key);
2195         if (err)
2196                 return err;
2197
2198         if (!key.p.key)
2199                 return -EINVAL;
2200
2201         if (info->attrs[NL80211_ATTR_MAC])
2202                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2203
2204         if (key.type == -1) {
2205                 if (mac_addr)
2206                         key.type = NL80211_KEYTYPE_PAIRWISE;
2207                 else
2208                         key.type = NL80211_KEYTYPE_GROUP;
2209         }
2210
2211         /* for now */
2212         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2213             key.type != NL80211_KEYTYPE_GROUP)
2214                 return -EINVAL;
2215
2216         if (!rdev->ops->add_key)
2217                 return -EOPNOTSUPP;
2218
2219         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2220                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2221                                            mac_addr))
2222                 return -EINVAL;
2223
2224         wdev_lock(dev->ieee80211_ptr);
2225         err = nl80211_key_allowed(dev->ieee80211_ptr);
2226         if (!err)
2227                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2228                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2229                                          mac_addr, &key.p);
2230         wdev_unlock(dev->ieee80211_ptr);
2231
2232         return err;
2233 }
2234
2235 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2236 {
2237         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2238         int err;
2239         struct net_device *dev = info->user_ptr[1];
2240         u8 *mac_addr = NULL;
2241         struct key_parse key;
2242
2243         err = nl80211_parse_key(info, &key);
2244         if (err)
2245                 return err;
2246
2247         if (info->attrs[NL80211_ATTR_MAC])
2248                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2249
2250         if (key.type == -1) {
2251                 if (mac_addr)
2252                         key.type = NL80211_KEYTYPE_PAIRWISE;
2253                 else
2254                         key.type = NL80211_KEYTYPE_GROUP;
2255         }
2256
2257         /* for now */
2258         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2259             key.type != NL80211_KEYTYPE_GROUP)
2260                 return -EINVAL;
2261
2262         if (!rdev->ops->del_key)
2263                 return -EOPNOTSUPP;
2264
2265         wdev_lock(dev->ieee80211_ptr);
2266         err = nl80211_key_allowed(dev->ieee80211_ptr);
2267
2268         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2269             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2270                 err = -ENOENT;
2271
2272         if (!err)
2273                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2274                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2275                                          mac_addr);
2276
2277 #ifdef CONFIG_CFG80211_WEXT
2278         if (!err) {
2279                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2280                         dev->ieee80211_ptr->wext.default_key = -1;
2281                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2282                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2283         }
2284 #endif
2285         wdev_unlock(dev->ieee80211_ptr);
2286
2287         return err;
2288 }
2289
2290 static int nl80211_parse_beacon(struct genl_info *info,
2291                                 struct cfg80211_beacon_data *bcn)
2292 {
2293         bool haveinfo = false;
2294
2295         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2296             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2297             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2298             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2299                 return -EINVAL;
2300
2301         memset(bcn, 0, sizeof(*bcn));
2302
2303         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2304                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2305                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2306                 if (!bcn->head_len)
2307                         return -EINVAL;
2308                 haveinfo = true;
2309         }
2310
2311         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2312                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2313                 bcn->tail_len =
2314                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2315                 haveinfo = true;
2316         }
2317
2318         if (!haveinfo)
2319                 return -EINVAL;
2320
2321         if (info->attrs[NL80211_ATTR_IE]) {
2322                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2323                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2324         }
2325
2326         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2327                 bcn->proberesp_ies =
2328                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2329                 bcn->proberesp_ies_len =
2330                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2331         }
2332
2333         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2334                 bcn->assocresp_ies =
2335                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2336                 bcn->assocresp_ies_len =
2337                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2338         }
2339
2340         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2341                 bcn->probe_resp =
2342                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2343                 bcn->probe_resp_len =
2344                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2345         }
2346
2347         return 0;
2348 }
2349
2350 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2351                                    struct cfg80211_ap_settings *params)
2352 {
2353         struct wireless_dev *wdev;
2354         bool ret = false;
2355
2356         mutex_lock(&rdev->devlist_mtx);
2357
2358         list_for_each_entry(wdev, &rdev->netdev_list, list) {
2359                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2360                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2361                         continue;
2362
2363                 if (!wdev->preset_chan)
2364                         continue;
2365
2366                 params->channel = wdev->preset_chan;
2367                 params->channel_type = wdev->preset_chantype;
2368                 ret = true;
2369                 break;
2370         }
2371
2372         mutex_unlock(&rdev->devlist_mtx);
2373
2374         return ret;
2375 }
2376
2377 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2378 {
2379         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2380         struct net_device *dev = info->user_ptr[1];
2381         struct wireless_dev *wdev = dev->ieee80211_ptr;
2382         struct cfg80211_ap_settings params;
2383         int err;
2384
2385         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2386             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2387                 return -EOPNOTSUPP;
2388
2389         if (!rdev->ops->start_ap)
2390                 return -EOPNOTSUPP;
2391
2392         if (wdev->beacon_interval)
2393                 return -EALREADY;
2394
2395         memset(&params, 0, sizeof(params));
2396
2397         /* these are required for START_AP */
2398         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2399             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2400             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2401                 return -EINVAL;
2402
2403         err = nl80211_parse_beacon(info, &params.beacon);
2404         if (err)
2405                 return err;
2406
2407         params.beacon_interval =
2408                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2409         params.dtim_period =
2410                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2411
2412         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2413         if (err)
2414                 return err;
2415
2416         /*
2417          * In theory, some of these attributes should be required here
2418          * but since they were not used when the command was originally
2419          * added, keep them optional for old user space programs to let
2420          * them continue to work with drivers that do not need the
2421          * additional information -- drivers must check!
2422          */
2423         if (info->attrs[NL80211_ATTR_SSID]) {
2424                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2425                 params.ssid_len =
2426                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2427                 if (params.ssid_len == 0 ||
2428                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2429                         return -EINVAL;
2430         }
2431
2432         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2433                 params.hidden_ssid = nla_get_u32(
2434                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2435                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2436                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2437                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2438                         return -EINVAL;
2439         }
2440
2441         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2442
2443         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2444                 params.auth_type = nla_get_u32(
2445                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2446                 if (!nl80211_valid_auth_type(params.auth_type))
2447                         return -EINVAL;
2448         } else
2449                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2450
2451         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2452                                       NL80211_MAX_NR_CIPHER_SUITES);
2453         if (err)
2454                 return err;
2455
2456         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2457                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2458                         return -EOPNOTSUPP;
2459                 params.inactivity_timeout = nla_get_u16(
2460                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2461         }
2462
2463         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2464                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2465
2466                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2467                     !nl80211_valid_channel_type(info, &channel_type))
2468                         return -EINVAL;
2469
2470                 params.channel = rdev_freq_to_chan(rdev,
2471                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2472                         channel_type);
2473                 if (!params.channel)
2474                         return -EINVAL;
2475                 params.channel_type = channel_type;
2476         } else if (wdev->preset_chan) {
2477                 params.channel = wdev->preset_chan;
2478                 params.channel_type = wdev->preset_chantype;
2479         } else if (!nl80211_get_ap_channel(rdev, &params))
2480                 return -EINVAL;
2481
2482         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2483                                           params.channel_type))
2484                 return -EINVAL;
2485
2486         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2487         if (!err) {
2488                 wdev->preset_chan = params.channel;
2489                 wdev->preset_chantype = params.channel_type;
2490                 wdev->beacon_interval = params.beacon_interval;
2491         }
2492         return err;
2493 }
2494
2495 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2496 {
2497         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2498         struct net_device *dev = info->user_ptr[1];
2499         struct wireless_dev *wdev = dev->ieee80211_ptr;
2500         struct cfg80211_beacon_data params;
2501         int err;
2502
2503         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2504             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2505                 return -EOPNOTSUPP;
2506
2507         if (!rdev->ops->change_beacon)
2508                 return -EOPNOTSUPP;
2509
2510         if (!wdev->beacon_interval)
2511                 return -EINVAL;
2512
2513         err = nl80211_parse_beacon(info, &params);
2514         if (err)
2515                 return err;
2516
2517         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2518 }
2519
2520 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2521 {
2522         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2523         struct net_device *dev = info->user_ptr[1];
2524         struct wireless_dev *wdev = dev->ieee80211_ptr;
2525         int err;
2526
2527         if (!rdev->ops->stop_ap)
2528                 return -EOPNOTSUPP;
2529
2530         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2531             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2532                 return -EOPNOTSUPP;
2533
2534         if (!wdev->beacon_interval)
2535                 return -ENOENT;
2536
2537         err = rdev->ops->stop_ap(&rdev->wiphy, dev);
2538         if (!err)
2539                 wdev->beacon_interval = 0;
2540         return err;
2541 }
2542
2543 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2544         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2545         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2546         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2547         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2548         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2549         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2550 };
2551
2552 static int parse_station_flags(struct genl_info *info,
2553                                enum nl80211_iftype iftype,
2554                                struct station_parameters *params)
2555 {
2556         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2557         struct nlattr *nla;
2558         int flag;
2559
2560         /*
2561          * Try parsing the new attribute first so userspace
2562          * can specify both for older kernels.
2563          */
2564         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2565         if (nla) {
2566                 struct nl80211_sta_flag_update *sta_flags;
2567
2568                 sta_flags = nla_data(nla);
2569                 params->sta_flags_mask = sta_flags->mask;
2570                 params->sta_flags_set = sta_flags->set;
2571                 if ((params->sta_flags_mask |
2572                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2573                         return -EINVAL;
2574                 return 0;
2575         }
2576
2577         /* if present, parse the old attribute */
2578
2579         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2580         if (!nla)
2581                 return 0;
2582
2583         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2584                              nla, sta_flags_policy))
2585                 return -EINVAL;
2586
2587         /*
2588          * Only allow certain flags for interface types so that
2589          * other attributes are silently ignored. Remember that
2590          * this is backward compatibility code with old userspace
2591          * and shouldn't be hit in other cases anyway.
2592          */
2593         switch (iftype) {
2594         case NL80211_IFTYPE_AP:
2595         case NL80211_IFTYPE_AP_VLAN:
2596         case NL80211_IFTYPE_P2P_GO:
2597                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2598                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2599                                          BIT(NL80211_STA_FLAG_WME) |
2600                                          BIT(NL80211_STA_FLAG_MFP);
2601                 break;
2602         case NL80211_IFTYPE_P2P_CLIENT:
2603         case NL80211_IFTYPE_STATION:
2604                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2605                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2606                 break;
2607         case NL80211_IFTYPE_MESH_POINT:
2608                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2609                                          BIT(NL80211_STA_FLAG_MFP) |
2610                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2611         default:
2612                 return -EINVAL;
2613         }
2614
2615         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2616                 if (flags[flag]) {
2617                         params->sta_flags_set |= (1<<flag);
2618
2619                         /* no longer support new API additions in old API */
2620                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2621                                 return -EINVAL;
2622                 }
2623         }
2624
2625         return 0;
2626 }
2627
2628 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2629                                  int attr)
2630 {
2631         struct nlattr *rate;
2632         u16 bitrate;
2633
2634         rate = nla_nest_start(msg, attr);
2635         if (!rate)
2636                 goto nla_put_failure;
2637
2638         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2639         bitrate = cfg80211_calculate_bitrate(info);
2640         if ((bitrate > 0 &&
2641              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
2642             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2643              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2644             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2645              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2646             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2647              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2648                 goto nla_put_failure;
2649
2650         nla_nest_end(msg, rate);
2651         return true;
2652
2653 nla_put_failure:
2654         return false;
2655 }
2656
2657 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2658                                 int flags,
2659                                 struct cfg80211_registered_device *rdev,
2660                                 struct net_device *dev,
2661                                 const u8 *mac_addr, struct station_info *sinfo)
2662 {
2663         void *hdr;
2664         struct nlattr *sinfoattr, *bss_param;
2665
2666         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2667         if (!hdr)
2668                 return -1;
2669
2670         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2671             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2672             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2673                 goto nla_put_failure;
2674
2675         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2676         if (!sinfoattr)
2677                 goto nla_put_failure;
2678         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2679             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2680                         sinfo->connected_time))
2681                 goto nla_put_failure;
2682         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2683             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2684                         sinfo->inactive_time))
2685                 goto nla_put_failure;
2686         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2687             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2688                         sinfo->rx_bytes))
2689                 goto nla_put_failure;
2690         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2691             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2692                         sinfo->tx_bytes))
2693                 goto nla_put_failure;
2694         if ((sinfo->filled & STATION_INFO_LLID) &&
2695             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2696                 goto nla_put_failure;
2697         if ((sinfo->filled & STATION_INFO_PLID) &&
2698             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2699                 goto nla_put_failure;
2700         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2701             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2702                        sinfo->plink_state))
2703                 goto nla_put_failure;
2704         switch (rdev->wiphy.signal_type) {
2705         case CFG80211_SIGNAL_TYPE_MBM:
2706                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2707                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2708                                sinfo->signal))
2709                         goto nla_put_failure;
2710                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2711                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2712                                sinfo->signal_avg))
2713                         goto nla_put_failure;
2714                 break;
2715         default:
2716                 break;
2717         }
2718         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2719                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2720                                           NL80211_STA_INFO_TX_BITRATE))
2721                         goto nla_put_failure;
2722         }
2723         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2724                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2725                                           NL80211_STA_INFO_RX_BITRATE))
2726                         goto nla_put_failure;
2727         }
2728         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2729             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2730                         sinfo->rx_packets))
2731                 goto nla_put_failure;
2732         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2733             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2734                         sinfo->tx_packets))
2735                 goto nla_put_failure;
2736         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2737             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2738                         sinfo->tx_retries))
2739                 goto nla_put_failure;
2740         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2741             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2742                         sinfo->tx_failed))
2743                 goto nla_put_failure;
2744         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2745             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2746                         sinfo->beacon_loss_count))
2747                 goto nla_put_failure;
2748         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2749                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2750                 if (!bss_param)
2751                         goto nla_put_failure;
2752
2753                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2754                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2755                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2756                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2757                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2758                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2759                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2760                                sinfo->bss_param.dtim_period) ||
2761                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2762                                 sinfo->bss_param.beacon_interval))
2763                         goto nla_put_failure;
2764
2765                 nla_nest_end(msg, bss_param);
2766         }
2767         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2768             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2769                     sizeof(struct nl80211_sta_flag_update),
2770                     &sinfo->sta_flags))
2771                 goto nla_put_failure;
2772         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2773                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2774                             sinfo->t_offset))
2775                 goto nla_put_failure;
2776         nla_nest_end(msg, sinfoattr);
2777
2778         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2779             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2780                     sinfo->assoc_req_ies))
2781                 goto nla_put_failure;
2782
2783         return genlmsg_end(msg, hdr);
2784
2785  nla_put_failure:
2786         genlmsg_cancel(msg, hdr);
2787         return -EMSGSIZE;
2788 }
2789
2790 static int nl80211_dump_station(struct sk_buff *skb,
2791                                 struct netlink_callback *cb)
2792 {
2793         struct station_info sinfo;
2794         struct cfg80211_registered_device *dev;
2795         struct net_device *netdev;
2796         u8 mac_addr[ETH_ALEN];
2797         int sta_idx = cb->args[1];
2798         int err;
2799
2800         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2801         if (err)
2802                 return err;
2803
2804         if (!dev->ops->dump_station) {
2805                 err = -EOPNOTSUPP;
2806                 goto out_err;
2807         }
2808
2809         while (1) {
2810                 memset(&sinfo, 0, sizeof(sinfo));
2811                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2812                                              mac_addr, &sinfo);
2813                 if (err == -ENOENT)
2814                         break;
2815                 if (err)
2816                         goto out_err;
2817
2818                 if (nl80211_send_station(skb,
2819                                 NETLINK_CB(cb->skb).pid,
2820                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2821                                 dev, netdev, mac_addr,
2822                                 &sinfo) < 0)
2823                         goto out;
2824
2825                 sta_idx++;
2826         }
2827
2828
2829  out:
2830         cb->args[1] = sta_idx;
2831         err = skb->len;
2832  out_err:
2833         nl80211_finish_netdev_dump(dev);
2834
2835         return err;
2836 }
2837
2838 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2839 {
2840         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2841         struct net_device *dev = info->user_ptr[1];
2842         struct station_info sinfo;
2843         struct sk_buff *msg;
2844         u8 *mac_addr = NULL;
2845         int err;
2846
2847         memset(&sinfo, 0, sizeof(sinfo));
2848
2849         if (!info->attrs[NL80211_ATTR_MAC])
2850                 return -EINVAL;
2851
2852         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2853
2854         if (!rdev->ops->get_station)
2855                 return -EOPNOTSUPP;
2856
2857         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2858         if (err)
2859                 return err;
2860
2861         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2862         if (!msg)
2863                 return -ENOMEM;
2864
2865         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2866                                  rdev, dev, mac_addr, &sinfo) < 0) {
2867                 nlmsg_free(msg);
2868                 return -ENOBUFS;
2869         }
2870
2871         return genlmsg_reply(msg, info);
2872 }
2873
2874 /*
2875  * Get vlan interface making sure it is running and on the right wiphy.
2876  */
2877 static struct net_device *get_vlan(struct genl_info *info,
2878                                    struct cfg80211_registered_device *rdev)
2879 {
2880         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2881         struct net_device *v;
2882         int ret;
2883
2884         if (!vlanattr)
2885                 return NULL;
2886
2887         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2888         if (!v)
2889                 return ERR_PTR(-ENODEV);
2890
2891         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2892                 ret = -EINVAL;
2893                 goto error;
2894         }
2895
2896         if (!netif_running(v)) {
2897                 ret = -ENETDOWN;
2898                 goto error;
2899         }
2900
2901         return v;
2902  error:
2903         dev_put(v);
2904         return ERR_PTR(ret);
2905 }
2906
2907 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2908 {
2909         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2910         int err;
2911         struct net_device *dev = info->user_ptr[1];
2912         struct station_parameters params;
2913         u8 *mac_addr = NULL;
2914
2915         memset(&params, 0, sizeof(params));
2916
2917         params.listen_interval = -1;
2918         params.plink_state = -1;
2919
2920         if (info->attrs[NL80211_ATTR_STA_AID])
2921                 return -EINVAL;
2922
2923         if (!info->attrs[NL80211_ATTR_MAC])
2924                 return -EINVAL;
2925
2926         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2927
2928         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2929                 params.supported_rates =
2930                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2931                 params.supported_rates_len =
2932                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2933         }
2934
2935         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2936                 params.listen_interval =
2937                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2938
2939         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2940                 params.ht_capa =
2941                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2942
2943         if (!rdev->ops->change_station)
2944                 return -EOPNOTSUPP;
2945
2946         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2947                 return -EINVAL;
2948
2949         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2950                 params.plink_action =
2951                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2952
2953         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2954                 params.plink_state =
2955                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2956
2957         switch (dev->ieee80211_ptr->iftype) {
2958         case NL80211_IFTYPE_AP:
2959         case NL80211_IFTYPE_AP_VLAN:
2960         case NL80211_IFTYPE_P2P_GO:
2961                 /* disallow mesh-specific things */
2962                 if (params.plink_action)
2963                         return -EINVAL;
2964
2965                 /* TDLS can't be set, ... */
2966                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2967                         return -EINVAL;
2968                 /*
2969                  * ... but don't bother the driver with it. This works around
2970                  * a hostapd/wpa_supplicant issue -- it always includes the
2971                  * TLDS_PEER flag in the mask even for AP mode.
2972                  */
2973                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2974
2975                 /* accept only the listed bits */
2976                 if (params.sta_flags_mask &
2977                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2978                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2979                                   BIT(NL80211_STA_FLAG_WME) |
2980                                   BIT(NL80211_STA_FLAG_MFP)))
2981                         return -EINVAL;
2982
2983                 /* must be last in here for error handling */
2984                 params.vlan = get_vlan(info, rdev);
2985                 if (IS_ERR(params.vlan))
2986                         return PTR_ERR(params.vlan);
2987                 break;
2988         case NL80211_IFTYPE_P2P_CLIENT:
2989         case NL80211_IFTYPE_STATION:
2990                 /*
2991                  * Don't allow userspace to change the TDLS_PEER flag,
2992                  * but silently ignore attempts to change it since we
2993                  * don't have state here to verify that it doesn't try
2994                  * to change the flag.
2995                  */
2996                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2997                 /* fall through */
2998         case NL80211_IFTYPE_ADHOC:
2999                 /* disallow things sta doesn't support */
3000                 if (params.plink_action)
3001                         return -EINVAL;
3002                 if (params.ht_capa)
3003                         return -EINVAL;
3004                 if (params.listen_interval >= 0)
3005                         return -EINVAL;
3006                 /* reject any changes other than AUTHORIZED */
3007                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3008                         return -EINVAL;
3009                 break;
3010         case NL80211_IFTYPE_MESH_POINT:
3011                 /* disallow things mesh doesn't support */
3012                 if (params.vlan)
3013                         return -EINVAL;
3014                 if (params.ht_capa)
3015                         return -EINVAL;
3016                 if (params.listen_interval >= 0)
3017                         return -EINVAL;
3018                 /*
3019                  * No special handling for TDLS here -- the userspace
3020                  * mesh code doesn't have this bug.
3021                  */
3022                 if (params.sta_flags_mask &
3023                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3024                                   BIT(NL80211_STA_FLAG_MFP) |
3025                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3026                         return -EINVAL;
3027                 break;
3028         default:
3029                 return -EOPNOTSUPP;
3030         }
3031
3032         /* be aware of params.vlan when changing code here */
3033
3034         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3035
3036         if (params.vlan)
3037                 dev_put(params.vlan);
3038
3039         return err;
3040 }
3041
3042 static struct nla_policy
3043 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3044         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3045         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3046 };
3047
3048 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3049 {
3050         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3051         int err;
3052         struct net_device *dev = info->user_ptr[1];
3053         struct station_parameters params;
3054         u8 *mac_addr = NULL;
3055
3056         memset(&params, 0, sizeof(params));
3057
3058         if (!info->attrs[NL80211_ATTR_MAC])
3059                 return -EINVAL;
3060
3061         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3062                 return -EINVAL;
3063
3064         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3065                 return -EINVAL;
3066
3067         if (!info->attrs[NL80211_ATTR_STA_AID])
3068                 return -EINVAL;
3069
3070         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3071         params.supported_rates =
3072                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3073         params.supported_rates_len =
3074                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3075         params.listen_interval =
3076                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3077
3078         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3079         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3080                 return -EINVAL;
3081
3082         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3083                 params.ht_capa =
3084                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3085
3086         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3087                 params.plink_action =
3088                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3089
3090         if (!rdev->ops->add_station)
3091                 return -EOPNOTSUPP;
3092
3093         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3094                 return -EINVAL;
3095
3096         switch (dev->ieee80211_ptr->iftype) {
3097         case NL80211_IFTYPE_AP:
3098         case NL80211_IFTYPE_AP_VLAN:
3099         case NL80211_IFTYPE_P2P_GO:
3100                 /* parse WME attributes if sta is WME capable */
3101                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3102                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3103                     info->attrs[NL80211_ATTR_STA_WME]) {
3104                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3105                         struct nlattr *nla;
3106
3107                         nla = info->attrs[NL80211_ATTR_STA_WME];
3108                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3109                                                nl80211_sta_wme_policy);
3110                         if (err)
3111                                 return err;
3112
3113                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3114                                 params.uapsd_queues =
3115                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3116                         if (params.uapsd_queues &
3117                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3118                                 return -EINVAL;
3119
3120                         if (tb[NL80211_STA_WME_MAX_SP])
3121                                 params.max_sp =
3122                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3123
3124                         if (params.max_sp &
3125                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3126                                 return -EINVAL;
3127
3128                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3129                 }
3130                 /* TDLS peers cannot be added */
3131                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3132                         return -EINVAL;
3133                 /* but don't bother the driver with it */
3134                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3135
3136                 /* must be last in here for error handling */
3137                 params.vlan = get_vlan(info, rdev);
3138                 if (IS_ERR(params.vlan))
3139                         return PTR_ERR(params.vlan);
3140                 break;
3141         case NL80211_IFTYPE_MESH_POINT:
3142                 /* TDLS peers cannot be added */
3143                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3144                         return -EINVAL;
3145                 break;
3146         case NL80211_IFTYPE_STATION:
3147                 /* Only TDLS peers can be added */
3148                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3149                         return -EINVAL;
3150                 /* Can only add if TDLS ... */
3151                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3152                         return -EOPNOTSUPP;
3153                 /* ... with external setup is supported */
3154                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3155                         return -EOPNOTSUPP;
3156                 break;
3157         default:
3158                 return -EOPNOTSUPP;
3159         }
3160
3161         /* be aware of params.vlan when changing code here */
3162
3163         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3164
3165         if (params.vlan)
3166                 dev_put(params.vlan);
3167         return err;
3168 }
3169
3170 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3171 {
3172         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3173         struct net_device *dev = info->user_ptr[1];
3174         u8 *mac_addr = NULL;
3175
3176         if (info->attrs[NL80211_ATTR_MAC])
3177                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3178
3179         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3180             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3181             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3182             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3183                 return -EINVAL;
3184
3185         if (!rdev->ops->del_station)
3186                 return -EOPNOTSUPP;
3187
3188         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3189 }
3190
3191 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3192                                 int flags, struct net_device *dev,
3193                                 u8 *dst, u8 *next_hop,
3194                                 struct mpath_info *pinfo)
3195 {
3196         void *hdr;
3197         struct nlattr *pinfoattr;
3198
3199         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3200         if (!hdr)
3201                 return -1;
3202
3203         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3204             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3205             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3206             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3207                 goto nla_put_failure;
3208
3209         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3210         if (!pinfoattr)
3211                 goto nla_put_failure;
3212         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3213             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3214                         pinfo->frame_qlen))
3215                 goto nla_put_failure;
3216         if (((pinfo->filled & MPATH_INFO_SN) &&
3217              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3218             ((pinfo->filled & MPATH_INFO_METRIC) &&
3219              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3220                          pinfo->metric)) ||
3221             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3222              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3223                          pinfo->exptime)) ||
3224             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3225              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3226                         pinfo->flags)) ||
3227             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3228              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3229                          pinfo->discovery_timeout)) ||
3230             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3231              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3232                         pinfo->discovery_retries)))
3233                 goto nla_put_failure;
3234
3235         nla_nest_end(msg, pinfoattr);
3236
3237         return genlmsg_end(msg, hdr);
3238
3239  nla_put_failure:
3240         genlmsg_cancel(msg, hdr);
3241         return -EMSGSIZE;
3242 }
3243
3244 static int nl80211_dump_mpath(struct sk_buff *skb,
3245                               struct netlink_callback *cb)
3246 {
3247         struct mpath_info pinfo;
3248         struct cfg80211_registered_device *dev;
3249         struct net_device *netdev;
3250         u8 dst[ETH_ALEN];
3251         u8 next_hop[ETH_ALEN];
3252         int path_idx = cb->args[1];
3253         int err;
3254
3255         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3256         if (err)
3257                 return err;
3258
3259         if (!dev->ops->dump_mpath) {
3260                 err = -EOPNOTSUPP;
3261                 goto out_err;
3262         }
3263
3264         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3265                 err = -EOPNOTSUPP;
3266                 goto out_err;
3267         }
3268
3269         while (1) {
3270                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3271                                            dst, next_hop, &pinfo);
3272                 if (err == -ENOENT)
3273                         break;
3274                 if (err)
3275                         goto out_err;
3276
3277                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3278                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3279                                        netdev, dst, next_hop,
3280                                        &pinfo) < 0)
3281                         goto out;
3282
3283                 path_idx++;
3284         }
3285
3286
3287  out:
3288         cb->args[1] = path_idx;
3289         err = skb->len;
3290  out_err:
3291         nl80211_finish_netdev_dump(dev);
3292         return err;
3293 }
3294
3295 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3296 {
3297         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3298         int err;
3299         struct net_device *dev = info->user_ptr[1];
3300         struct mpath_info pinfo;
3301         struct sk_buff *msg;
3302         u8 *dst = NULL;
3303         u8 next_hop[ETH_ALEN];
3304
3305         memset(&pinfo, 0, sizeof(pinfo));
3306
3307         if (!info->attrs[NL80211_ATTR_MAC])
3308                 return -EINVAL;
3309
3310         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3311
3312         if (!rdev->ops->get_mpath)
3313                 return -EOPNOTSUPP;
3314
3315         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3316                 return -EOPNOTSUPP;
3317
3318         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3319         if (err)
3320                 return err;
3321
3322         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3323         if (!msg)
3324                 return -ENOMEM;
3325
3326         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3327                                  dev, dst, next_hop, &pinfo) < 0) {
3328                 nlmsg_free(msg);
3329                 return -ENOBUFS;
3330         }
3331
3332         return genlmsg_reply(msg, info);
3333 }
3334
3335 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3336 {
3337         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3338         struct net_device *dev = info->user_ptr[1];
3339         u8 *dst = NULL;
3340         u8 *next_hop = NULL;
3341
3342         if (!info->attrs[NL80211_ATTR_MAC])
3343                 return -EINVAL;
3344
3345         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3346                 return -EINVAL;
3347
3348         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3349         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3350
3351         if (!rdev->ops->change_mpath)
3352                 return -EOPNOTSUPP;
3353
3354         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3355                 return -EOPNOTSUPP;
3356
3357         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3358 }
3359
3360 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3361 {
3362         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3363         struct net_device *dev = info->user_ptr[1];
3364         u8 *dst = NULL;
3365         u8 *next_hop = NULL;
3366
3367         if (!info->attrs[NL80211_ATTR_MAC])
3368                 return -EINVAL;
3369
3370         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3371                 return -EINVAL;
3372
3373         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3374         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3375
3376         if (!rdev->ops->add_mpath)
3377                 return -EOPNOTSUPP;
3378
3379         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3380                 return -EOPNOTSUPP;
3381
3382         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3383 }
3384
3385 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3386 {
3387         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3388         struct net_device *dev = info->user_ptr[1];
3389         u8 *dst = NULL;
3390
3391         if (info->attrs[NL80211_ATTR_MAC])
3392                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3393
3394         if (!rdev->ops->del_mpath)
3395                 return -EOPNOTSUPP;
3396
3397         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3398 }
3399
3400 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3401 {
3402         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3403         struct net_device *dev = info->user_ptr[1];
3404         struct bss_parameters params;
3405
3406         memset(&params, 0, sizeof(params));
3407         /* default to not changing parameters */
3408         params.use_cts_prot = -1;
3409         params.use_short_preamble = -1;
3410         params.use_short_slot_time = -1;
3411         params.ap_isolate = -1;
3412         params.ht_opmode = -1;
3413
3414         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3415                 params.use_cts_prot =
3416                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3417         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3418                 params.use_short_preamble =
3419                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3420         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3421                 params.use_short_slot_time =
3422                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3423         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3424                 params.basic_rates =
3425                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3426                 params.basic_rates_len =
3427                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3428         }
3429         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3430                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3431         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3432                 params.ht_opmode =
3433                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3434
3435         if (!rdev->ops->change_bss)
3436                 return -EOPNOTSUPP;
3437
3438         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3439             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3440                 return -EOPNOTSUPP;
3441
3442         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3443 }
3444
3445 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3446         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3447         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3448         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3449         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3450         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3451         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3452 };
3453
3454 static int parse_reg_rule(struct nlattr *tb[],
3455         struct ieee80211_reg_rule *reg_rule)
3456 {
3457         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3458         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3459
3460         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3461                 return -EINVAL;
3462         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3463                 return -EINVAL;
3464         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3465                 return -EINVAL;
3466         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3467                 return -EINVAL;
3468         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3469                 return -EINVAL;
3470
3471         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3472
3473         freq_range->start_freq_khz =
3474                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3475         freq_range->end_freq_khz =
3476                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3477         freq_range->max_bandwidth_khz =
3478                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3479
3480         power_rule->max_eirp =
3481                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3482
3483         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3484                 power_rule->max_antenna_gain =
3485                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3486
3487         return 0;
3488 }
3489
3490 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3491 {
3492         int r;
3493         char *data = NULL;
3494
3495         /*
3496          * You should only get this when cfg80211 hasn't yet initialized
3497          * completely when built-in to the kernel right between the time
3498          * window between nl80211_init() and regulatory_init(), if that is
3499          * even possible.
3500          */
3501         mutex_lock(&cfg80211_mutex);
3502         if (unlikely(!cfg80211_regdomain)) {
3503                 mutex_unlock(&cfg80211_mutex);
3504                 return -EINPROGRESS;
3505         }
3506         mutex_unlock(&cfg80211_mutex);
3507
3508         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3509                 return -EINVAL;
3510
3511         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3512
3513         r = regulatory_hint_user(data);
3514
3515         return r;
3516 }
3517
3518 static int nl80211_get_mesh_config(struct sk_buff *skb,
3519                                    struct genl_info *info)
3520 {
3521         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3522         struct net_device *dev = info->user_ptr[1];
3523         struct wireless_dev *wdev = dev->ieee80211_ptr;
3524         struct mesh_config cur_params;
3525         int err = 0;
3526         void *hdr;
3527         struct nlattr *pinfoattr;
3528         struct sk_buff *msg;
3529
3530         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3531                 return -EOPNOTSUPP;
3532
3533         if (!rdev->ops->get_mesh_config)
3534                 return -EOPNOTSUPP;
3535
3536         wdev_lock(wdev);
3537         /* If not connected, get default parameters */
3538         if (!wdev->mesh_id_len)
3539                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3540         else
3541                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3542                                                  &cur_params);
3543         wdev_unlock(wdev);
3544
3545         if (err)
3546                 return err;
3547
3548         /* Draw up a netlink message to send back */
3549         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3550         if (!msg)
3551                 return -ENOMEM;
3552         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3553                              NL80211_CMD_GET_MESH_CONFIG);
3554         if (!hdr)
3555                 goto out;
3556         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3557         if (!pinfoattr)
3558                 goto nla_put_failure;
3559         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3560             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3561                         cur_params.dot11MeshRetryTimeout) ||
3562             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3563                         cur_params.dot11MeshConfirmTimeout) ||
3564             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3565                         cur_params.dot11MeshHoldingTimeout) ||
3566             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3567                         cur_params.dot11MeshMaxPeerLinks) ||
3568             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3569                        cur_params.dot11MeshMaxRetries) ||
3570             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3571                        cur_params.dot11MeshTTL) ||
3572             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3573                        cur_params.element_ttl) ||
3574             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3575                        cur_params.auto_open_plinks) ||
3576             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3577                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3578             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3579                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3580             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3581                         cur_params.path_refresh_time) ||
3582             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3583                         cur_params.min_discovery_timeout) ||
3584             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3585                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3586             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3587                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3588             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3589                         cur_params.dot11MeshHWMPperrMinInterval) ||
3590             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3591                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3592             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3593                        cur_params.dot11MeshHWMPRootMode) ||
3594             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3595                         cur_params.dot11MeshHWMPRannInterval) ||
3596             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3597                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3598             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3599                        cur_params.dot11MeshForwarding) ||
3600             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3601                         cur_params.rssi_threshold) ||
3602             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3603                         cur_params.ht_opmode) ||
3604             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3605                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3606             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3607                         cur_params.dot11MeshHWMProotInterval) ||
3608             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3609                         cur_params.dot11MeshHWMPconfirmationInterval))
3610                 goto nla_put_failure;
3611         nla_nest_end(msg, pinfoattr);
3612         genlmsg_end(msg, hdr);
3613         return genlmsg_reply(msg, info);
3614
3615  nla_put_failure:
3616         genlmsg_cancel(msg, hdr);
3617  out:
3618         nlmsg_free(msg);
3619         return -ENOBUFS;
3620 }
3621
3622 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3623         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3624         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3625         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3626         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3627         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3628         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3629         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3630         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3631         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3632         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3633         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3634         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3635         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3636         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3637         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3638         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3639         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3640         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3641         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3642         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3643         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3644         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3645         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3646         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3647         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3648 };
3649
3650 static const struct nla_policy
3651         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3652         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3653         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3654         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3655         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3656         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3657                                     .len = IEEE80211_MAX_DATA_LEN },
3658         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3659 };
3660
3661 static int nl80211_parse_mesh_config(struct genl_info *info,
3662                                      struct mesh_config *cfg,
3663                                      u32 *mask_out)
3664 {
3665         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3666         u32 mask = 0;
3667
3668 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3669 do {\
3670         if (table[attr_num]) {\
3671                 cfg->param = nla_fn(table[attr_num]); \
3672                 mask |= (1 << (attr_num - 1)); \
3673         } \
3674 } while (0);\
3675
3676
3677         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3678                 return -EINVAL;
3679         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3680                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3681                              nl80211_meshconf_params_policy))
3682                 return -EINVAL;
3683
3684         /* This makes sure that there aren't more than 32 mesh config
3685          * parameters (otherwise our bitfield scheme would not work.) */
3686         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3687
3688         /* Fill in the params struct */
3689         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3690                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3691                                   nla_get_u16);
3692         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3693                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3694                                   nla_get_u16);
3695         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3696                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3697                                   nla_get_u16);
3698         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3699                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3700                                   nla_get_u16);
3701         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3702                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3703                                   nla_get_u8);
3704         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3705                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3706         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3707                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3708                                   nla_get_u8);
3709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3710                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3711                                   nla_get_u8);
3712         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3713                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3714                                   nla_get_u32);
3715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3716                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3717                                   nla_get_u8);
3718         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3719                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3720                                   nla_get_u32);
3721         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3722                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3723                                   nla_get_u16);
3724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3725                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3726                                   nla_get_u32);
3727         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3728                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3729                                   nla_get_u16);
3730         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3731                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3732                                   nla_get_u16);
3733         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3734                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3735                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3736                                   nla_get_u16);
3737         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3738                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3739         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3740                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3741                                   nla_get_u16);
3742         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3743                                   dot11MeshGateAnnouncementProtocol, mask,
3744                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3745                                   nla_get_u8);
3746         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3747                                   mask, NL80211_MESHCONF_FORWARDING,
3748                                   nla_get_u8);
3749         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3750                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3751                                   nla_get_u32);
3752         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3753                                   mask, NL80211_MESHCONF_HT_OPMODE,
3754                                   nla_get_u16);
3755         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3756                                   mask,
3757                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3758                                   nla_get_u32);
3759         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3760                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3761                                   nla_get_u16);
3762         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3763                                   dot11MeshHWMPconfirmationInterval, mask,
3764                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3765                                   nla_get_u16);
3766         if (mask_out)
3767                 *mask_out = mask;
3768
3769         return 0;
3770
3771 #undef FILL_IN_MESH_PARAM_IF_SET
3772 }
3773
3774 static int nl80211_parse_mesh_setup(struct genl_info *info,
3775                                      struct mesh_setup *setup)
3776 {
3777         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3778
3779         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3780                 return -EINVAL;
3781         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3782                              info->attrs[NL80211_ATTR_MESH_SETUP],
3783                              nl80211_mesh_setup_params_policy))
3784                 return -EINVAL;
3785
3786         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3787                 setup->sync_method =
3788                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3789                  IEEE80211_SYNC_METHOD_VENDOR :
3790                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3791
3792         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3793                 setup->path_sel_proto =
3794                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3795                  IEEE80211_PATH_PROTOCOL_VENDOR :
3796                  IEEE80211_PATH_PROTOCOL_HWMP;
3797
3798         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3799                 setup->path_metric =
3800                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3801                  IEEE80211_PATH_METRIC_VENDOR :
3802                  IEEE80211_PATH_METRIC_AIRTIME;
3803
3804
3805         if (tb[NL80211_MESH_SETUP_IE]) {
3806                 struct nlattr *ieattr =
3807                         tb[NL80211_MESH_SETUP_IE];
3808                 if (!is_valid_ie_attr(ieattr))
3809                         return -EINVAL;
3810                 setup->ie = nla_data(ieattr);
3811                 setup->ie_len = nla_len(ieattr);
3812         }
3813         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3814         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3815
3816         return 0;
3817 }
3818
3819 static int nl80211_update_mesh_config(struct sk_buff *skb,
3820                                       struct genl_info *info)
3821 {
3822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3823         struct net_device *dev = info->user_ptr[1];
3824         struct wireless_dev *wdev = dev->ieee80211_ptr;
3825         struct mesh_config cfg;
3826         u32 mask;
3827         int err;
3828
3829         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3830                 return -EOPNOTSUPP;
3831
3832         if (!rdev->ops->update_mesh_config)
3833                 return -EOPNOTSUPP;
3834
3835         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3836         if (err)
3837                 return err;
3838
3839         wdev_lock(wdev);
3840         if (!wdev->mesh_id_len)
3841                 err = -ENOLINK;
3842
3843         if (!err)
3844                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3845                                                     mask, &cfg);
3846
3847         wdev_unlock(wdev);
3848
3849         return err;
3850 }
3851
3852 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3853 {
3854         struct sk_buff *msg;
3855         void *hdr = NULL;
3856         struct nlattr *nl_reg_rules;
3857         unsigned int i;
3858         int err = -EINVAL;
3859
3860         mutex_lock(&cfg80211_mutex);
3861
3862         if (!cfg80211_regdomain)
3863                 goto out;
3864
3865         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3866         if (!msg) {
3867                 err = -ENOBUFS;
3868                 goto out;
3869         }
3870
3871         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3872                              NL80211_CMD_GET_REG);
3873         if (!hdr)
3874                 goto put_failure;
3875
3876         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3877                            cfg80211_regdomain->alpha2) ||
3878             (cfg80211_regdomain->dfs_region &&
3879              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3880                         cfg80211_regdomain->dfs_region)))
3881                 goto nla_put_failure;
3882
3883         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3884         if (!nl_reg_rules)
3885                 goto nla_put_failure;
3886
3887         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3888                 struct nlattr *nl_reg_rule;
3889                 const struct ieee80211_reg_rule *reg_rule;
3890                 const struct ieee80211_freq_range *freq_range;
3891                 const struct ieee80211_power_rule *power_rule;
3892
3893                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3894                 freq_range = &reg_rule->freq_range;
3895                 power_rule = &reg_rule->power_rule;
3896
3897                 nl_reg_rule = nla_nest_start(msg, i);
3898                 if (!nl_reg_rule)
3899                         goto nla_put_failure;
3900
3901                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3902                                 reg_rule->flags) ||
3903                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3904                                 freq_range->start_freq_khz) ||
3905                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3906                                 freq_range->end_freq_khz) ||
3907                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3908                                 freq_range->max_bandwidth_khz) ||
3909                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3910                                 power_rule->max_antenna_gain) ||
3911                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3912                                 power_rule->max_eirp))
3913                         goto nla_put_failure;
3914
3915                 nla_nest_end(msg, nl_reg_rule);
3916         }
3917
3918         nla_nest_end(msg, nl_reg_rules);
3919
3920         genlmsg_end(msg, hdr);
3921         err = genlmsg_reply(msg, info);
3922         goto out;
3923
3924 nla_put_failure:
3925         genlmsg_cancel(msg, hdr);
3926 put_failure:
3927         nlmsg_free(msg);
3928         err = -EMSGSIZE;
3929 out:
3930         mutex_unlock(&cfg80211_mutex);
3931         return err;
3932 }
3933
3934 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3935 {
3936         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3937         struct nlattr *nl_reg_rule;
3938         char *alpha2 = NULL;
3939         int rem_reg_rules = 0, r = 0;
3940         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3941         u8 dfs_region = 0;
3942         struct ieee80211_regdomain *rd = NULL;
3943
3944         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3945                 return -EINVAL;
3946
3947         if (!info->attrs[NL80211_ATTR_REG_RULES])
3948                 return -EINVAL;
3949
3950         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3951
3952         if (info->attrs[NL80211_ATTR_DFS_REGION])
3953                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3954
3955         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3956                         rem_reg_rules) {
3957                 num_rules++;
3958                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3959                         return -EINVAL;
3960         }
3961
3962         mutex_lock(&cfg80211_mutex);
3963
3964         if (!reg_is_valid_request(alpha2)) {
3965                 r = -EINVAL;
3966                 goto bad_reg;
3967         }
3968
3969         size_of_regd = sizeof(struct ieee80211_regdomain) +
3970                 (num_rules * sizeof(struct ieee80211_reg_rule));
3971
3972         rd = kzalloc(size_of_regd, GFP_KERNEL);
3973         if (!rd) {
3974                 r = -ENOMEM;
3975                 goto bad_reg;
3976         }
3977
3978         rd->n_reg_rules = num_rules;
3979         rd->alpha2[0] = alpha2[0];
3980         rd->alpha2[1] = alpha2[1];
3981
3982         /*
3983          * Disable DFS master mode if the DFS region was
3984          * not supported or known on this kernel.
3985          */
3986         if (reg_supported_dfs_region(dfs_region))
3987                 rd->dfs_region = dfs_region;
3988
3989         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3990                         rem_reg_rules) {
3991                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3992                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3993                         reg_rule_policy);
3994                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3995                 if (r)
3996                         goto bad_reg;
3997
3998                 rule_idx++;
3999
4000                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4001                         r = -EINVAL;
4002                         goto bad_reg;
4003                 }
4004         }
4005
4006         BUG_ON(rule_idx != num_rules);
4007
4008         r = set_regdom(rd);
4009
4010         mutex_unlock(&cfg80211_mutex);
4011
4012         return r;
4013
4014  bad_reg:
4015         mutex_unlock(&cfg80211_mutex);
4016         kfree(rd);
4017         return r;
4018 }
4019
4020 static int validate_scan_freqs(struct nlattr *freqs)
4021 {
4022         struct nlattr *attr1, *attr2;
4023         int n_channels = 0, tmp1, tmp2;
4024
4025         nla_for_each_nested(attr1, freqs, tmp1) {
4026                 n_channels++;
4027                 /*
4028                  * Some hardware has a limited channel list for
4029                  * scanning, and it is pretty much nonsensical
4030                  * to scan for a channel twice, so disallow that
4031                  * and don't require drivers to check that the
4032                  * channel list they get isn't longer than what
4033                  * they can scan, as long as they can scan all
4034                  * the channels they registered at once.
4035                  */
4036                 nla_for_each_nested(attr2, freqs, tmp2)
4037                         if (attr1 != attr2 &&
4038                             nla_get_u32(attr1) == nla_get_u32(attr2))
4039                                 return 0;
4040         }
4041
4042         return n_channels;
4043 }
4044
4045 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4046 {
4047         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4048         struct net_device *dev = info->user_ptr[1];
4049         struct cfg80211_scan_request *request;
4050         struct nlattr *attr;
4051         struct wiphy *wiphy;
4052         int err, tmp, n_ssids = 0, n_channels, i;
4053         size_t ie_len;
4054
4055         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4056                 return -EINVAL;
4057
4058         wiphy = &rdev->wiphy;
4059
4060         if (!rdev->ops->scan)
4061                 return -EOPNOTSUPP;
4062
4063         if (rdev->scan_req)
4064                 return -EBUSY;
4065
4066         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4067                 n_channels = validate_scan_freqs(
4068                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4069                 if (!n_channels)
4070                         return -EINVAL;
4071         } else {
4072                 enum ieee80211_band band;
4073                 n_channels = 0;
4074
4075                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4076                         if (wiphy->bands[band])
4077                                 n_channels += wiphy->bands[band]->n_channels;
4078         }
4079
4080         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4081                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4082                         n_ssids++;
4083
4084         if (n_ssids > wiphy->max_scan_ssids)
4085                 return -EINVAL;
4086
4087         if (info->attrs[NL80211_ATTR_IE])
4088                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4089         else
4090                 ie_len = 0;
4091
4092         if (ie_len > wiphy->max_scan_ie_len)
4093                 return -EINVAL;
4094
4095         request = kzalloc(sizeof(*request)
4096                         + sizeof(*request->ssids) * n_ssids
4097                         + sizeof(*request->channels) * n_channels
4098                         + ie_len, GFP_KERNEL);
4099         if (!request)
4100                 return -ENOMEM;
4101
4102         if (n_ssids)
4103                 request->ssids = (void *)&request->channels[n_channels];
4104         request->n_ssids = n_ssids;
4105         if (ie_len) {
4106                 if (request->ssids)
4107                         request->ie = (void *)(request->ssids + n_ssids);
4108                 else
4109                         request->ie = (void *)(request->channels + n_channels);
4110         }
4111
4112         i = 0;
4113         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4114                 /* user specified, bail out if channel not found */
4115                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4116                         struct ieee80211_channel *chan;
4117
4118                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4119
4120                         if (!chan) {
4121                                 err = -EINVAL;
4122                                 goto out_free;
4123                         }
4124
4125                         /* ignore disabled channels */
4126                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4127                                 continue;
4128
4129                         request->channels[i] = chan;
4130                         i++;
4131                 }
4132         } else {
4133                 enum ieee80211_band band;
4134
4135                 /* all channels */
4136                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4137                         int j;
4138                         if (!wiphy->bands[band])
4139                                 continue;
4140                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4141                                 struct ieee80211_channel *chan;
4142
4143                                 chan = &wiphy->bands[band]->channels[j];
4144
4145                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4146                                         continue;
4147
4148                                 request->channels[i] = chan;
4149                                 i++;
4150                         }
4151                 }
4152         }
4153
4154         if (!i) {
4155                 err = -EINVAL;
4156                 goto out_free;
4157         }
4158
4159         request->n_channels = i;
4160
4161         i = 0;
4162         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4163                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4164                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4165                                 err = -EINVAL;
4166                                 goto out_free;
4167                         }
4168                         request->ssids[i].ssid_len = nla_len(attr);
4169                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4170                         i++;
4171                 }
4172         }
4173
4174         if (info->attrs[NL80211_ATTR_IE]) {
4175                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4176                 memcpy((void *)request->ie,
4177                        nla_data(info->attrs[NL80211_ATTR_IE]),
4178                        request->ie_len);
4179         }
4180
4181         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4182                 if (wiphy->bands[i])
4183                         request->rates[i] =
4184                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4185
4186         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4187                 nla_for_each_nested(attr,
4188                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4189                                     tmp) {
4190                         enum ieee80211_band band = nla_type(attr);
4191
4192                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4193                                 err = -EINVAL;
4194                                 goto out_free;
4195                         }
4196                         err = ieee80211_get_ratemask(wiphy->bands[band],
4197                                                      nla_data(attr),
4198                                                      nla_len(attr),
4199                                                      &request->rates[band]);
4200                         if (err)
4201                                 goto out_free;
4202                 }
4203         }
4204
4205         request->no_cck =
4206                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4207
4208         request->dev = dev;
4209         request->wiphy = &rdev->wiphy;
4210
4211         rdev->scan_req = request;
4212         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4213
4214         if (!err) {
4215                 nl80211_send_scan_start(rdev, dev);
4216                 dev_hold(dev);
4217         } else {
4218  out_free:
4219                 rdev->scan_req = NULL;
4220                 kfree(request);
4221         }
4222
4223         return err;
4224 }
4225
4226 static int nl80211_start_sched_scan(struct sk_buff *skb,
4227                                     struct genl_info *info)
4228 {
4229         struct cfg80211_sched_scan_request *request;
4230         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4231         struct net_device *dev = info->user_ptr[1];
4232         struct nlattr *attr;
4233         struct wiphy *wiphy;
4234         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4235         u32 interval;
4236         enum ieee80211_band band;
4237         size_t ie_len;
4238         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4239
4240         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4241             !rdev->ops->sched_scan_start)
4242                 return -EOPNOTSUPP;
4243
4244         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4245                 return -EINVAL;
4246
4247         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4248                 return -EINVAL;
4249
4250         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4251         if (interval == 0)
4252                 return -EINVAL;
4253
4254         wiphy = &rdev->wiphy;
4255
4256         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4257                 n_channels = validate_scan_freqs(
4258                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4259                 if (!n_channels)
4260                         return -EINVAL;
4261         } else {
4262                 n_channels = 0;
4263
4264                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4265                         if (wiphy->bands[band])
4266                                 n_channels += wiphy->bands[band]->n_channels;
4267         }
4268
4269         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4270                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4271                                     tmp)
4272                         n_ssids++;
4273
4274         if (n_ssids > wiphy->max_sched_scan_ssids)
4275                 return -EINVAL;
4276
4277         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4278                 nla_for_each_nested(attr,
4279                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4280                                     tmp)
4281                         n_match_sets++;
4282
4283         if (n_match_sets > wiphy->max_match_sets)
4284                 return -EINVAL;
4285
4286         if (info->attrs[NL80211_ATTR_IE])
4287                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4288         else
4289                 ie_len = 0;
4290
4291         if (ie_len > wiphy->max_sched_scan_ie_len)
4292                 return -EINVAL;
4293
4294         mutex_lock(&rdev->sched_scan_mtx);
4295
4296         if (rdev->sched_scan_req) {
4297                 err = -EINPROGRESS;
4298                 goto out;
4299         }
4300
4301         request = kzalloc(sizeof(*request)
4302                         + sizeof(*request->ssids) * n_ssids
4303                         + sizeof(*request->match_sets) * n_match_sets
4304                         + sizeof(*request->channels) * n_channels
4305                         + ie_len, GFP_KERNEL);
4306         if (!request) {
4307                 err = -ENOMEM;
4308                 goto out;
4309         }
4310
4311         if (n_ssids)
4312                 request->ssids = (void *)&request->channels[n_channels];
4313         request->n_ssids = n_ssids;
4314         if (ie_len) {
4315                 if (request->ssids)
4316                         request->ie = (void *)(request->ssids + n_ssids);
4317                 else
4318                         request->ie = (void *)(request->channels + n_channels);
4319         }
4320
4321         if (n_match_sets) {
4322                 if (request->ie)
4323                         request->match_sets = (void *)(request->ie + ie_len);
4324                 else if (request->ssids)
4325                         request->match_sets =
4326                                 (void *)(request->ssids + n_ssids);
4327                 else
4328                         request->match_sets =
4329                                 (void *)(request->channels + n_channels);
4330         }
4331         request->n_match_sets = n_match_sets;
4332
4333         i = 0;
4334         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4335                 /* user specified, bail out if channel not found */
4336                 nla_for_each_nested(attr,
4337                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4338                                     tmp) {
4339                         struct ieee80211_channel *chan;
4340
4341                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4342
4343                         if (!chan) {
4344                                 err = -EINVAL;
4345                                 goto out_free;
4346                         }
4347
4348                         /* ignore disabled channels */
4349                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4350                                 continue;
4351
4352                         request->channels[i] = chan;
4353                         i++;
4354                 }
4355         } else {
4356                 /* all channels */
4357                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4358                         int j;
4359                         if (!wiphy->bands[band])
4360                                 continue;
4361                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4362                                 struct ieee80211_channel *chan;
4363
4364                                 chan = &wiphy->bands[band]->channels[j];
4365
4366                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4367                                         continue;
4368
4369                                 request->channels[i] = chan;
4370                                 i++;
4371                         }
4372                 }
4373         }
4374
4375         if (!i) {
4376                 err = -EINVAL;
4377                 goto out_free;
4378         }
4379
4380         request->n_channels = i;
4381
4382         i = 0;
4383         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4384                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4385                                     tmp) {
4386                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4387                                 err = -EINVAL;
4388                                 goto out_free;
4389                         }
4390                         request->ssids[i].ssid_len = nla_len(attr);
4391                         memcpy(request->ssids[i].ssid, nla_data(attr),
4392                                nla_len(attr));
4393                         i++;
4394                 }
4395         }
4396
4397         i = 0;
4398         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4399                 nla_for_each_nested(attr,
4400                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4401                                     tmp) {
4402                         struct nlattr *ssid, *rssi;
4403
4404                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4405                                   nla_data(attr), nla_len(attr),
4406                                   nl80211_match_policy);
4407                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4408                         if (ssid) {
4409                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4410                                         err = -EINVAL;
4411                                         goto out_free;
4412                                 }
4413                                 memcpy(request->match_sets[i].ssid.ssid,
4414                                        nla_data(ssid), nla_len(ssid));
4415                                 request->match_sets[i].ssid.ssid_len =
4416                                         nla_len(ssid);
4417                         }
4418                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4419                         if (rssi)
4420                                 request->rssi_thold = nla_get_u32(rssi);
4421                         else
4422                                 request->rssi_thold =
4423                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4424                         i++;
4425                 }
4426         }
4427
4428         if (info->attrs[NL80211_ATTR_IE]) {
4429                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4430                 memcpy((void *)request->ie,
4431                        nla_data(info->attrs[NL80211_ATTR_IE]),
4432                        request->ie_len);
4433         }
4434
4435         request->dev = dev;
4436         request->wiphy = &rdev->wiphy;
4437         request->interval = interval;
4438
4439         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4440         if (!err) {
4441                 rdev->sched_scan_req = request;
4442                 nl80211_send_sched_scan(rdev, dev,
4443                                         NL80211_CMD_START_SCHED_SCAN);
4444                 goto out;
4445         }
4446
4447 out_free:
4448         kfree(request);
4449 out:
4450         mutex_unlock(&rdev->sched_scan_mtx);
4451         return err;
4452 }
4453
4454 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4455                                    struct genl_info *info)
4456 {
4457         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4458         int err;
4459
4460         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4461             !rdev->ops->sched_scan_stop)
4462                 return -EOPNOTSUPP;
4463
4464         mutex_lock(&rdev->sched_scan_mtx);
4465         err = __cfg80211_stop_sched_scan(rdev, false);
4466         mutex_unlock(&rdev->sched_scan_mtx);
4467
4468         return err;
4469 }
4470
4471 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4472                             u32 seq, int flags,
4473                             struct cfg80211_registered_device *rdev,
4474                             struct wireless_dev *wdev,
4475                             struct cfg80211_internal_bss *intbss)
4476 {
4477         struct cfg80211_bss *res = &intbss->pub;
4478         void *hdr;
4479         struct nlattr *bss;
4480
4481         ASSERT_WDEV_LOCK(wdev);
4482
4483         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4484                              NL80211_CMD_NEW_SCAN_RESULTS);
4485         if (!hdr)
4486                 return -1;
4487
4488         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4489
4490         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4491             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4492                 goto nla_put_failure;
4493
4494         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4495         if (!bss)
4496                 goto nla_put_failure;
4497         if ((!is_zero_ether_addr(res->bssid) &&
4498              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4499             (res->information_elements && res->len_information_elements &&
4500              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4501                      res->len_information_elements,
4502                      res->information_elements)) ||
4503             (res->beacon_ies && res->len_beacon_ies &&
4504              res->beacon_ies != res->information_elements &&
4505              nla_put(msg, NL80211_BSS_BEACON_IES,
4506                      res->len_beacon_ies, res->beacon_ies)))
4507                 goto nla_put_failure;
4508         if (res->tsf &&
4509             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4510                 goto nla_put_failure;
4511         if (res->beacon_interval &&
4512             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4513                 goto nla_put_failure;
4514         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4515             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4516             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4517                         jiffies_to_msecs(jiffies - intbss->ts)))
4518                 goto nla_put_failure;
4519
4520         switch (rdev->wiphy.signal_type) {
4521         case CFG80211_SIGNAL_TYPE_MBM:
4522                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4523                         goto nla_put_failure;
4524                 break;
4525         case CFG80211_SIGNAL_TYPE_UNSPEC:
4526                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4527                         goto nla_put_failure;
4528                 break;
4529         default:
4530                 break;
4531         }
4532
4533         switch (wdev->iftype) {
4534         case NL80211_IFTYPE_P2P_CLIENT:
4535         case NL80211_IFTYPE_STATION:
4536                 if (intbss == wdev->current_bss &&
4537                     nla_put_u32(msg, NL80211_BSS_STATUS,
4538                                 NL80211_BSS_STATUS_ASSOCIATED))
4539                         goto nla_put_failure;
4540                 break;
4541         case NL80211_IFTYPE_ADHOC:
4542                 if (intbss == wdev->current_bss &&
4543                     nla_put_u32(msg, NL80211_BSS_STATUS,
4544                                 NL80211_BSS_STATUS_IBSS_JOINED))
4545                         goto nla_put_failure;
4546                 break;
4547         default:
4548                 break;
4549         }
4550
4551         nla_nest_end(msg, bss);
4552
4553         return genlmsg_end(msg, hdr);
4554
4555  nla_put_failure:
4556         genlmsg_cancel(msg, hdr);
4557         return -EMSGSIZE;
4558 }
4559
4560 static int nl80211_dump_scan(struct sk_buff *skb,
4561                              struct netlink_callback *cb)
4562 {
4563         struct cfg80211_registered_device *rdev;
4564         struct net_device *dev;
4565         struct cfg80211_internal_bss *scan;
4566         struct wireless_dev *wdev;
4567         int start = cb->args[1], idx = 0;
4568         int err;
4569
4570         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4571         if (err)
4572                 return err;
4573
4574         wdev = dev->ieee80211_ptr;
4575
4576         wdev_lock(wdev);
4577         spin_lock_bh(&rdev->bss_lock);
4578         cfg80211_bss_expire(rdev);
4579
4580         cb->seq = rdev->bss_generation;
4581
4582         list_for_each_entry(scan, &rdev->bss_list, list) {
4583                 if (++idx <= start)
4584                         continue;
4585                 if (nl80211_send_bss(skb, cb,
4586                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4587                                 rdev, wdev, scan) < 0) {
4588                         idx--;
4589                         break;
4590                 }
4591         }
4592
4593         spin_unlock_bh(&rdev->bss_lock);
4594         wdev_unlock(wdev);
4595
4596         cb->args[1] = idx;
4597         nl80211_finish_netdev_dump(rdev);
4598
4599         return skb->len;
4600 }
4601
4602 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4603                                 int flags, struct net_device *dev,
4604                                 struct survey_info *survey)
4605 {
4606         void *hdr;
4607         struct nlattr *infoattr;
4608
4609         hdr = nl80211hdr_put(msg, pid, seq, flags,
4610                              NL80211_CMD_NEW_SURVEY_RESULTS);
4611         if (!hdr)
4612                 return -ENOMEM;
4613
4614         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4615                 goto nla_put_failure;
4616
4617         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4618         if (!infoattr)
4619                 goto nla_put_failure;
4620
4621         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4622                         survey->channel->center_freq))
4623                 goto nla_put_failure;
4624
4625         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4626             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4627                 goto nla_put_failure;
4628         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4629             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4630                 goto nla_put_failure;
4631         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4632             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4633                         survey->channel_time))
4634                 goto nla_put_failure;
4635         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4636             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4637                         survey->channel_time_busy))
4638                 goto nla_put_failure;
4639         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4640             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4641                         survey->channel_time_ext_busy))
4642                 goto nla_put_failure;
4643         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4644             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4645                         survey->channel_time_rx))
4646                 goto nla_put_failure;
4647         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4648             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4649                         survey->channel_time_tx))
4650                 goto nla_put_failure;
4651
4652         nla_nest_end(msg, infoattr);
4653
4654         return genlmsg_end(msg, hdr);
4655
4656  nla_put_failure:
4657         genlmsg_cancel(msg, hdr);
4658         return -EMSGSIZE;
4659 }
4660
4661 static int nl80211_dump_survey(struct sk_buff *skb,
4662                         struct netlink_callback *cb)
4663 {
4664         struct survey_info survey;
4665         struct cfg80211_registered_device *dev;
4666         struct net_device *netdev;
4667         int survey_idx = cb->args[1];
4668         int res;
4669
4670         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4671         if (res)
4672                 return res;
4673
4674         if (!dev->ops->dump_survey) {
4675                 res = -EOPNOTSUPP;
4676                 goto out_err;
4677         }
4678
4679         while (1) {
4680                 struct ieee80211_channel *chan;
4681
4682                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4683                                             &survey);
4684                 if (res == -ENOENT)
4685                         break;
4686                 if (res)
4687                         goto out_err;
4688
4689                 /* Survey without a channel doesn't make sense */
4690                 if (!survey.channel) {
4691                         res = -EINVAL;
4692                         goto out;
4693                 }
4694
4695                 chan = ieee80211_get_channel(&dev->wiphy,
4696                                              survey.channel->center_freq);
4697                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4698                         survey_idx++;
4699                         continue;
4700                 }
4701
4702                 if (nl80211_send_survey(skb,
4703                                 NETLINK_CB(cb->skb).pid,
4704                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4705                                 netdev,
4706                                 &survey) < 0)
4707                         goto out;
4708                 survey_idx++;
4709         }
4710
4711  out:
4712         cb->args[1] = survey_idx;
4713         res = skb->len;
4714  out_err:
4715         nl80211_finish_netdev_dump(dev);
4716         return res;
4717 }
4718
4719 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4720 {
4721         return auth_type <= NL80211_AUTHTYPE_MAX;
4722 }
4723
4724 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4725 {
4726         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4727                                   NL80211_WPA_VERSION_2));
4728 }
4729
4730 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4731 {
4732         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4733         struct net_device *dev = info->user_ptr[1];
4734         struct ieee80211_channel *chan;
4735         const u8 *bssid, *ssid, *ie = NULL;
4736         int err, ssid_len, ie_len = 0;
4737         enum nl80211_auth_type auth_type;
4738         struct key_parse key;
4739         bool local_state_change;
4740
4741         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4742                 return -EINVAL;
4743
4744         if (!info->attrs[NL80211_ATTR_MAC])
4745                 return -EINVAL;
4746
4747         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4748                 return -EINVAL;
4749
4750         if (!info->attrs[NL80211_ATTR_SSID])
4751                 return -EINVAL;
4752
4753         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4754                 return -EINVAL;
4755
4756         err = nl80211_parse_key(info, &key);
4757         if (err)
4758                 return err;
4759
4760         if (key.idx >= 0) {
4761                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4762                         return -EINVAL;
4763                 if (!key.p.key || !key.p.key_len)
4764                         return -EINVAL;
4765                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4766                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4767                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4768                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4769                         return -EINVAL;
4770                 if (key.idx > 4)
4771                         return -EINVAL;
4772         } else {
4773                 key.p.key_len = 0;
4774                 key.p.key = NULL;
4775         }
4776
4777         if (key.idx >= 0) {
4778                 int i;
4779                 bool ok = false;
4780                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4781                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4782                                 ok = true;
4783                                 break;
4784                         }
4785                 }
4786                 if (!ok)
4787                         return -EINVAL;
4788         }
4789
4790         if (!rdev->ops->auth)
4791                 return -EOPNOTSUPP;
4792
4793         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4794             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4795                 return -EOPNOTSUPP;
4796
4797         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4798         chan = ieee80211_get_channel(&rdev->wiphy,
4799                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4800         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4801                 return -EINVAL;
4802
4803         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4804         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4805
4806         if (info->attrs[NL80211_ATTR_IE]) {
4807                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4808                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4809         }
4810
4811         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4812         if (!nl80211_valid_auth_type(auth_type))
4813                 return -EINVAL;
4814
4815         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4816
4817         /*
4818          * Since we no longer track auth state, ignore
4819          * requests to only change local state.
4820          */
4821         if (local_state_change)
4822                 return 0;
4823
4824         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4825                                   ssid, ssid_len, ie, ie_len,
4826                                   key.p.key, key.p.key_len, key.idx);
4827 }
4828
4829 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4830                                    struct genl_info *info,
4831                                    struct cfg80211_crypto_settings *settings,
4832                                    int cipher_limit)
4833 {
4834         memset(settings, 0, sizeof(*settings));
4835
4836         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4837
4838         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4839                 u16 proto;
4840                 proto = nla_get_u16(
4841                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4842                 settings->control_port_ethertype = cpu_to_be16(proto);
4843                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4844                     proto != ETH_P_PAE)
4845                         return -EINVAL;
4846                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4847                         settings->control_port_no_encrypt = true;
4848         } else
4849                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4850
4851         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4852                 void *data;
4853                 int len, i;
4854
4855                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4856                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4857                 settings->n_ciphers_pairwise = len / sizeof(u32);
4858
4859                 if (len % sizeof(u32))
4860                         return -EINVAL;
4861
4862                 if (settings->n_ciphers_pairwise > cipher_limit)
4863                         return -EINVAL;
4864
4865                 memcpy(settings->ciphers_pairwise, data, len);
4866
4867                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4868                         if (!cfg80211_supported_cipher_suite(
4869                                         &rdev->wiphy,
4870                                         settings->ciphers_pairwise[i]))
4871                                 return -EINVAL;
4872         }
4873
4874         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4875                 settings->cipher_group =
4876                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4877                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4878                                                      settings->cipher_group))
4879                         return -EINVAL;
4880         }
4881
4882         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4883                 settings->wpa_versions =
4884                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4885                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4886                         return -EINVAL;
4887         }
4888
4889         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4890                 void *data;
4891                 int len;
4892
4893                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4894                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4895                 settings->n_akm_suites = len / sizeof(u32);
4896
4897                 if (len % sizeof(u32))
4898                         return -EINVAL;
4899
4900                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4901                         return -EINVAL;
4902
4903                 memcpy(settings->akm_suites, data, len);
4904         }
4905
4906         return 0;
4907 }
4908
4909 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4910 {
4911         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4912         struct net_device *dev = info->user_ptr[1];
4913         struct cfg80211_crypto_settings crypto;
4914         struct ieee80211_channel *chan;
4915         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4916         int err, ssid_len, ie_len = 0;
4917         bool use_mfp = false;
4918         u32 flags = 0;
4919         struct ieee80211_ht_cap *ht_capa = NULL;
4920         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4921
4922         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4923                 return -EINVAL;
4924
4925         if (!info->attrs[NL80211_ATTR_MAC] ||
4926             !info->attrs[NL80211_ATTR_SSID] ||
4927             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4928                 return -EINVAL;
4929
4930         if (!rdev->ops->assoc)
4931                 return -EOPNOTSUPP;
4932
4933         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4934             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4935                 return -EOPNOTSUPP;
4936
4937         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4938
4939         chan = ieee80211_get_channel(&rdev->wiphy,
4940                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4941         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4942                 return -EINVAL;
4943
4944         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4945         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4946
4947         if (info->attrs[NL80211_ATTR_IE]) {
4948                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4949                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4950         }
4951
4952         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4953                 enum nl80211_mfp mfp =
4954                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4955                 if (mfp == NL80211_MFP_REQUIRED)
4956                         use_mfp = true;
4957                 else if (mfp != NL80211_MFP_NO)
4958                         return -EINVAL;
4959         }
4960
4961         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4962                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4963
4964         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4965                 flags |= ASSOC_REQ_DISABLE_HT;
4966
4967         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4968                 ht_capa_mask =
4969                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4970
4971         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4972                 if (!ht_capa_mask)
4973                         return -EINVAL;
4974                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4975         }
4976
4977         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4978         if (!err)
4979                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4980                                           ssid, ssid_len, ie, ie_len, use_mfp,
4981                                           &crypto, flags, ht_capa,
4982                                           ht_capa_mask);
4983
4984         return err;
4985 }
4986
4987 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4988 {
4989         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4990         struct net_device *dev = info->user_ptr[1];
4991         const u8 *ie = NULL, *bssid;
4992         int ie_len = 0;
4993         u16 reason_code;
4994         bool local_state_change;
4995
4996         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4997                 return -EINVAL;
4998
4999         if (!info->attrs[NL80211_ATTR_MAC])
5000                 return -EINVAL;
5001
5002         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5003                 return -EINVAL;
5004
5005         if (!rdev->ops->deauth)
5006                 return -EOPNOTSUPP;
5007
5008         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5009             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5010                 return -EOPNOTSUPP;
5011
5012         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5013
5014         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5015         if (reason_code == 0) {
5016                 /* Reason Code 0 is reserved */
5017                 return -EINVAL;
5018         }
5019
5020         if (info->attrs[NL80211_ATTR_IE]) {
5021                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5022                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5023         }
5024
5025         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5026
5027         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5028                                     local_state_change);
5029 }
5030
5031 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5032 {
5033         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5034         struct net_device *dev = info->user_ptr[1];
5035         const u8 *ie = NULL, *bssid;
5036         int ie_len = 0;
5037         u16 reason_code;
5038         bool local_state_change;
5039
5040         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5041                 return -EINVAL;
5042
5043         if (!info->attrs[NL80211_ATTR_MAC])
5044                 return -EINVAL;
5045
5046         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5047                 return -EINVAL;
5048
5049         if (!rdev->ops->disassoc)
5050                 return -EOPNOTSUPP;
5051
5052         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5053             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5054                 return -EOPNOTSUPP;
5055
5056         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5057
5058         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5059         if (reason_code == 0) {
5060                 /* Reason Code 0 is reserved */
5061                 return -EINVAL;
5062         }
5063
5064         if (info->attrs[NL80211_ATTR_IE]) {
5065                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5066                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5067         }
5068
5069         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5070
5071         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5072                                       local_state_change);
5073 }
5074
5075 static bool
5076 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5077                          int mcast_rate[IEEE80211_NUM_BANDS],
5078                          int rateval)
5079 {
5080         struct wiphy *wiphy = &rdev->wiphy;
5081         bool found = false;
5082         int band, i;
5083
5084         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5085                 struct ieee80211_supported_band *sband;
5086
5087                 sband = wiphy->bands[band];
5088                 if (!sband)
5089                         continue;
5090
5091                 for (i = 0; i < sband->n_bitrates; i++) {
5092                         if (sband->bitrates[i].bitrate == rateval) {
5093                                 mcast_rate[band] = i + 1;
5094                                 found = true;
5095                                 break;
5096                         }
5097                 }
5098         }
5099
5100         return found;
5101 }
5102
5103 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5104 {
5105         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5106         struct net_device *dev = info->user_ptr[1];
5107         struct cfg80211_ibss_params ibss;
5108         struct wiphy *wiphy;
5109         struct cfg80211_cached_keys *connkeys = NULL;
5110         int err;
5111
5112         memset(&ibss, 0, sizeof(ibss));
5113
5114         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5115                 return -EINVAL;
5116
5117         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5118             !info->attrs[NL80211_ATTR_SSID] ||
5119             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5120                 return -EINVAL;
5121
5122         ibss.beacon_interval = 100;
5123
5124         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5125                 ibss.beacon_interval =
5126                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5127                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5128                         return -EINVAL;
5129         }
5130
5131         if (!rdev->ops->join_ibss)
5132                 return -EOPNOTSUPP;
5133
5134         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5135                 return -EOPNOTSUPP;
5136
5137         wiphy = &rdev->wiphy;
5138
5139         if (info->attrs[NL80211_ATTR_MAC]) {
5140                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5141
5142                 if (!is_valid_ether_addr(ibss.bssid))
5143                         return -EINVAL;
5144         }
5145         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5146         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5147
5148         if (info->attrs[NL80211_ATTR_IE]) {
5149                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5150                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5151         }
5152
5153         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5154                 enum nl80211_channel_type channel_type;
5155
5156                 if (!nl80211_valid_channel_type(info, &channel_type))
5157                         return -EINVAL;
5158
5159                 if (channel_type != NL80211_CHAN_NO_HT &&
5160                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5161                         return -EINVAL;
5162
5163                 ibss.channel_type = channel_type;
5164         } else {
5165                 ibss.channel_type = NL80211_CHAN_NO_HT;
5166         }
5167
5168         ibss.channel = rdev_freq_to_chan(rdev,
5169                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5170                 ibss.channel_type);
5171         if (!ibss.channel ||
5172             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5173             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5174                 return -EINVAL;
5175
5176         /* Both channels should be able to initiate communication */
5177         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5178              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5179             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5180                                           ibss.channel_type))
5181                 return -EINVAL;
5182
5183         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5184         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5185
5186         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5187                 u8 *rates =
5188                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5189                 int n_rates =
5190                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5191                 struct ieee80211_supported_band *sband =
5192                         wiphy->bands[ibss.channel->band];
5193
5194                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5195                                              &ibss.basic_rates);
5196                 if (err)
5197                         return err;
5198         }
5199
5200         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5201             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5202                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5203                 return -EINVAL;
5204
5205         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5206                 connkeys = nl80211_parse_connkeys(rdev,
5207                                         info->attrs[NL80211_ATTR_KEYS]);
5208                 if (IS_ERR(connkeys))
5209                         return PTR_ERR(connkeys);
5210         }
5211
5212         ibss.control_port =
5213                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5214
5215         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5216         if (err)
5217                 kfree(connkeys);
5218         return err;
5219 }
5220
5221 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5222 {
5223         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5224         struct net_device *dev = info->user_ptr[1];
5225
5226         if (!rdev->ops->leave_ibss)
5227                 return -EOPNOTSUPP;
5228
5229         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5230                 return -EOPNOTSUPP;
5231
5232         return cfg80211_leave_ibss(rdev, dev, false);
5233 }
5234
5235 #ifdef CONFIG_NL80211_TESTMODE
5236 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5237         .name = "testmode",
5238 };
5239
5240 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5241 {
5242         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5243         int err;
5244
5245         if (!info->attrs[NL80211_ATTR_TESTDATA])
5246                 return -EINVAL;
5247
5248         err = -EOPNOTSUPP;
5249         if (rdev->ops->testmode_cmd) {
5250                 rdev->testmode_info = info;
5251                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5252                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5253                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5254                 rdev->testmode_info = NULL;
5255         }
5256
5257         return err;
5258 }
5259
5260 static int nl80211_testmode_dump(struct sk_buff *skb,
5261                                  struct netlink_callback *cb)
5262 {
5263         struct cfg80211_registered_device *rdev;
5264         int err;
5265         long phy_idx;
5266         void *data = NULL;
5267         int data_len = 0;
5268
5269         if (cb->args[0]) {
5270                 /*
5271                  * 0 is a valid index, but not valid for args[0],
5272                  * so we need to offset by 1.
5273                  */
5274                 phy_idx = cb->args[0] - 1;
5275         } else {
5276                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5277                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5278                                   nl80211_policy);
5279                 if (err)
5280                         return err;
5281
5282                 mutex_lock(&cfg80211_mutex);
5283                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5284                                                   nl80211_fam.attrbuf);
5285                 if (IS_ERR(rdev)) {
5286                         mutex_unlock(&cfg80211_mutex);
5287                         return PTR_ERR(rdev);
5288                 }
5289                 phy_idx = rdev->wiphy_idx;
5290                 rdev = NULL;
5291                 mutex_unlock(&cfg80211_mutex);
5292
5293                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5294                         cb->args[1] =
5295                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5296         }
5297
5298         if (cb->args[1]) {
5299                 data = nla_data((void *)cb->args[1]);
5300                 data_len = nla_len((void *)cb->args[1]);
5301         }
5302
5303         mutex_lock(&cfg80211_mutex);
5304         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5305         if (!rdev) {
5306                 mutex_unlock(&cfg80211_mutex);
5307                 return -ENOENT;
5308         }
5309         cfg80211_lock_rdev(rdev);
5310         mutex_unlock(&cfg80211_mutex);
5311
5312         if (!rdev->ops->testmode_dump) {
5313                 err = -EOPNOTSUPP;
5314                 goto out_err;
5315         }
5316
5317         while (1) {
5318                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5319                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5320                                            NL80211_CMD_TESTMODE);
5321                 struct nlattr *tmdata;
5322
5323                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5324                         genlmsg_cancel(skb, hdr);
5325                         break;
5326                 }
5327
5328                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5329                 if (!tmdata) {
5330                         genlmsg_cancel(skb, hdr);
5331                         break;
5332                 }
5333                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5334                                                data, data_len);
5335                 nla_nest_end(skb, tmdata);
5336
5337                 if (err == -ENOBUFS || err == -ENOENT) {
5338                         genlmsg_cancel(skb, hdr);
5339                         break;
5340                 } else if (err) {
5341                         genlmsg_cancel(skb, hdr);
5342                         goto out_err;
5343                 }
5344
5345                 genlmsg_end(skb, hdr);
5346         }
5347
5348         err = skb->len;
5349         /* see above */
5350         cb->args[0] = phy_idx + 1;
5351  out_err:
5352         cfg80211_unlock_rdev(rdev);
5353         return err;
5354 }
5355
5356 static struct sk_buff *
5357 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5358                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5359 {
5360         struct sk_buff *skb;
5361         void *hdr;
5362         struct nlattr *data;
5363
5364         skb = nlmsg_new(approxlen + 100, gfp);
5365         if (!skb)
5366                 return NULL;
5367
5368         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5369         if (!hdr) {
5370                 kfree_skb(skb);
5371                 return NULL;
5372         }
5373
5374         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5375                 goto nla_put_failure;
5376         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5377
5378         ((void **)skb->cb)[0] = rdev;
5379         ((void **)skb->cb)[1] = hdr;
5380         ((void **)skb->cb)[2] = data;
5381
5382         return skb;
5383
5384  nla_put_failure:
5385         kfree_skb(skb);
5386         return NULL;
5387 }
5388
5389 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5390                                                   int approxlen)
5391 {
5392         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5393
5394         if (WARN_ON(!rdev->testmode_info))
5395                 return NULL;
5396
5397         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5398                                 rdev->testmode_info->snd_pid,
5399                                 rdev->testmode_info->snd_seq,
5400                                 GFP_KERNEL);
5401 }
5402 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5403
5404 int cfg80211_testmode_reply(struct sk_buff *skb)
5405 {
5406         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5407         void *hdr = ((void **)skb->cb)[1];
5408         struct nlattr *data = ((void **)skb->cb)[2];
5409
5410         if (WARN_ON(!rdev->testmode_info)) {
5411                 kfree_skb(skb);
5412                 return -EINVAL;
5413         }
5414
5415         nla_nest_end(skb, data);
5416         genlmsg_end(skb, hdr);
5417         return genlmsg_reply(skb, rdev->testmode_info);
5418 }
5419 EXPORT_SYMBOL(cfg80211_testmode_reply);
5420
5421 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5422                                                   int approxlen, gfp_t gfp)
5423 {
5424         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5425
5426         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5427 }
5428 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5429
5430 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5431 {
5432         void *hdr = ((void **)skb->cb)[1];
5433         struct nlattr *data = ((void **)skb->cb)[2];
5434
5435         nla_nest_end(skb, data);
5436         genlmsg_end(skb, hdr);
5437         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5438 }
5439 EXPORT_SYMBOL(cfg80211_testmode_event);
5440 #endif
5441
5442 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5443 {
5444         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5445         struct net_device *dev = info->user_ptr[1];
5446         struct cfg80211_connect_params connect;
5447         struct wiphy *wiphy;
5448         struct cfg80211_cached_keys *connkeys = NULL;
5449         int err;
5450
5451         memset(&connect, 0, sizeof(connect));
5452
5453         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5454                 return -EINVAL;
5455
5456         if (!info->attrs[NL80211_ATTR_SSID] ||
5457             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5458                 return -EINVAL;
5459
5460         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5461                 connect.auth_type =
5462                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5463                 if (!nl80211_valid_auth_type(connect.auth_type))
5464                         return -EINVAL;
5465         } else
5466                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5467
5468         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5469
5470         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5471                                       NL80211_MAX_NR_CIPHER_SUITES);
5472         if (err)
5473                 return err;
5474
5475         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5476             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5477                 return -EOPNOTSUPP;
5478
5479         wiphy = &rdev->wiphy;
5480
5481         connect.bg_scan_period = -1;
5482         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5483                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5484                 connect.bg_scan_period =
5485                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5486         }
5487
5488         if (info->attrs[NL80211_ATTR_MAC])
5489                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5490         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5491         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5492
5493         if (info->attrs[NL80211_ATTR_IE]) {
5494                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5495                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5496         }
5497
5498         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5499                 connect.channel =
5500                         ieee80211_get_channel(wiphy,
5501                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5502                 if (!connect.channel ||
5503                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5504                         return -EINVAL;
5505         }
5506
5507         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5508                 connkeys = nl80211_parse_connkeys(rdev,
5509                                         info->attrs[NL80211_ATTR_KEYS]);
5510                 if (IS_ERR(connkeys))
5511                         return PTR_ERR(connkeys);
5512         }
5513
5514         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5515                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5516
5517         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5518                 memcpy(&connect.ht_capa_mask,
5519                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5520                        sizeof(connect.ht_capa_mask));
5521
5522         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5523                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5524                         return -EINVAL;
5525                 memcpy(&connect.ht_capa,
5526                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5527                        sizeof(connect.ht_capa));
5528         }
5529
5530         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5531         if (err)
5532                 kfree(connkeys);
5533         return err;
5534 }
5535
5536 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5537 {
5538         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5539         struct net_device *dev = info->user_ptr[1];
5540         u16 reason;
5541
5542         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5543                 reason = WLAN_REASON_DEAUTH_LEAVING;
5544         else
5545                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5546
5547         if (reason == 0)
5548                 return -EINVAL;
5549
5550         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5551             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5552                 return -EOPNOTSUPP;
5553
5554         return cfg80211_disconnect(rdev, dev, reason, true);
5555 }
5556
5557 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5558 {
5559         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5560         struct net *net;
5561         int err;
5562         u32 pid;
5563
5564         if (!info->attrs[NL80211_ATTR_PID])
5565                 return -EINVAL;
5566
5567         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5568
5569         net = get_net_ns_by_pid(pid);
5570         if (IS_ERR(net))
5571                 return PTR_ERR(net);
5572
5573         err = 0;
5574
5575         /* check if anything to do */
5576         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5577                 err = cfg80211_switch_netns(rdev, net);
5578
5579         put_net(net);
5580         return err;
5581 }
5582
5583 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5584 {
5585         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5586         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5587                         struct cfg80211_pmksa *pmksa) = NULL;
5588         struct net_device *dev = info->user_ptr[1];
5589         struct cfg80211_pmksa pmksa;
5590
5591         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5592
5593         if (!info->attrs[NL80211_ATTR_MAC])
5594                 return -EINVAL;
5595
5596         if (!info->attrs[NL80211_ATTR_PMKID])
5597                 return -EINVAL;
5598
5599         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5600         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5601
5602         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5603             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5604                 return -EOPNOTSUPP;
5605
5606         switch (info->genlhdr->cmd) {
5607         case NL80211_CMD_SET_PMKSA:
5608                 rdev_ops = rdev->ops->set_pmksa;
5609                 break;
5610         case NL80211_CMD_DEL_PMKSA:
5611                 rdev_ops = rdev->ops->del_pmksa;
5612                 break;
5613         default:
5614                 WARN_ON(1);
5615                 break;
5616         }
5617
5618         if (!rdev_ops)
5619                 return -EOPNOTSUPP;
5620
5621         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5622 }
5623
5624 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5625 {
5626         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5627         struct net_device *dev = info->user_ptr[1];
5628
5629         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5630             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5631                 return -EOPNOTSUPP;
5632
5633         if (!rdev->ops->flush_pmksa)
5634                 return -EOPNOTSUPP;
5635
5636         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5637 }
5638
5639 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5640 {
5641         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5642         struct net_device *dev = info->user_ptr[1];
5643         u8 action_code, dialog_token;
5644         u16 status_code;
5645         u8 *peer;
5646
5647         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5648             !rdev->ops->tdls_mgmt)
5649                 return -EOPNOTSUPP;
5650
5651         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5652             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5653             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5654             !info->attrs[NL80211_ATTR_IE] ||
5655             !info->attrs[NL80211_ATTR_MAC])
5656                 return -EINVAL;
5657
5658         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5659         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5660         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5661         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5662
5663         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5664                                     dialog_token, status_code,
5665                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5666                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5667 }
5668
5669 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5670 {
5671         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5672         struct net_device *dev = info->user_ptr[1];
5673         enum nl80211_tdls_operation operation;
5674         u8 *peer;
5675
5676         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5677             !rdev->ops->tdls_oper)
5678                 return -EOPNOTSUPP;
5679
5680         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5681             !info->attrs[NL80211_ATTR_MAC])
5682                 return -EINVAL;
5683
5684         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5685         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5686
5687         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5688 }
5689
5690 static int nl80211_remain_on_channel(struct sk_buff *skb,
5691                                      struct genl_info *info)
5692 {
5693         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5694         struct net_device *dev = info->user_ptr[1];
5695         struct ieee80211_channel *chan;
5696         struct sk_buff *msg;
5697         void *hdr;
5698         u64 cookie;
5699         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5700         u32 freq, duration;
5701         int err;
5702
5703         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5704             !info->attrs[NL80211_ATTR_DURATION])
5705                 return -EINVAL;
5706
5707         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5708
5709         if (!rdev->ops->remain_on_channel ||
5710             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5711                 return -EOPNOTSUPP;
5712
5713         /*
5714          * We should be on that channel for at least a minimum amount of
5715          * time (10ms) but no longer than the driver supports.
5716          */
5717         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5718             duration > rdev->wiphy.max_remain_on_channel_duration)
5719                 return -EINVAL;
5720
5721         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5722             !nl80211_valid_channel_type(info, &channel_type))
5723                 return -EINVAL;
5724
5725         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5726         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5727         if (chan == NULL)
5728                 return -EINVAL;
5729
5730         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5731         if (!msg)
5732                 return -ENOMEM;
5733
5734         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5735                              NL80211_CMD_REMAIN_ON_CHANNEL);
5736
5737         if (IS_ERR(hdr)) {
5738                 err = PTR_ERR(hdr);
5739                 goto free_msg;
5740         }
5741
5742         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5743                                            channel_type, duration, &cookie);
5744
5745         if (err)
5746                 goto free_msg;
5747
5748         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5749                 goto nla_put_failure;
5750
5751         genlmsg_end(msg, hdr);
5752
5753         return genlmsg_reply(msg, info);
5754
5755  nla_put_failure:
5756         err = -ENOBUFS;
5757  free_msg:
5758         nlmsg_free(msg);
5759         return err;
5760 }
5761
5762 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5763                                             struct genl_info *info)
5764 {
5765         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5766         struct net_device *dev = info->user_ptr[1];
5767         u64 cookie;
5768
5769         if (!info->attrs[NL80211_ATTR_COOKIE])
5770                 return -EINVAL;
5771
5772         if (!rdev->ops->cancel_remain_on_channel)
5773                 return -EOPNOTSUPP;
5774
5775         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5776
5777         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5778 }
5779
5780 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5781                            u8 *rates, u8 rates_len)
5782 {
5783         u8 i;
5784         u32 mask = 0;
5785
5786         for (i = 0; i < rates_len; i++) {
5787                 int rate = (rates[i] & 0x7f) * 5;
5788                 int ridx;
5789                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5790                         struct ieee80211_rate *srate =
5791                                 &sband->bitrates[ridx];
5792                         if (rate == srate->bitrate) {
5793                                 mask |= 1 << ridx;
5794                                 break;
5795                         }
5796                 }
5797                 if (ridx == sband->n_bitrates)
5798                         return 0; /* rate not found */
5799         }
5800
5801         return mask;
5802 }
5803
5804 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5805                                u8 *rates, u8 rates_len,
5806                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5807 {
5808         u8 i;
5809
5810         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5811
5812         for (i = 0; i < rates_len; i++) {
5813                 int ridx, rbit;
5814
5815                 ridx = rates[i] / 8;
5816                 rbit = BIT(rates[i] % 8);
5817
5818                 /* check validity */
5819                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5820                         return false;
5821
5822                 /* check availability */
5823                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5824                         mcs[ridx] |= rbit;
5825                 else
5826                         return false;
5827         }
5828
5829         return true;
5830 }
5831
5832 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5833         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5834                                     .len = NL80211_MAX_SUPP_RATES },
5835         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5836                                  .len = NL80211_MAX_SUPP_HT_RATES },
5837 };
5838
5839 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5840                                        struct genl_info *info)
5841 {
5842         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5843         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5844         struct cfg80211_bitrate_mask mask;
5845         int rem, i;
5846         struct net_device *dev = info->user_ptr[1];
5847         struct nlattr *tx_rates;
5848         struct ieee80211_supported_band *sband;
5849
5850         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5851                 return -EINVAL;
5852
5853         if (!rdev->ops->set_bitrate_mask)
5854                 return -EOPNOTSUPP;
5855
5856         memset(&mask, 0, sizeof(mask));
5857         /* Default to all rates enabled */
5858         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5859                 sband = rdev->wiphy.bands[i];
5860                 mask.control[i].legacy =
5861                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5862                 if (sband)
5863                         memcpy(mask.control[i].mcs,
5864                                sband->ht_cap.mcs.rx_mask,
5865                                sizeof(mask.control[i].mcs));
5866                 else
5867                         memset(mask.control[i].mcs, 0,
5868                                sizeof(mask.control[i].mcs));
5869         }
5870
5871         /*
5872          * The nested attribute uses enum nl80211_band as the index. This maps
5873          * directly to the enum ieee80211_band values used in cfg80211.
5874          */
5875         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5876         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5877         {
5878                 enum ieee80211_band band = nla_type(tx_rates);
5879                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5880                         return -EINVAL;
5881                 sband = rdev->wiphy.bands[band];
5882                 if (sband == NULL)
5883                         return -EINVAL;
5884                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5885                           nla_len(tx_rates), nl80211_txattr_policy);
5886                 if (tb[NL80211_TXRATE_LEGACY]) {
5887                         mask.control[band].legacy = rateset_to_mask(
5888                                 sband,
5889                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5890                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5891                         if ((mask.control[band].legacy == 0) &&
5892                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5893                                 return -EINVAL;
5894                 }
5895                 if (tb[NL80211_TXRATE_MCS]) {
5896                         if (!ht_rateset_to_mask(
5897                                         sband,
5898                                         nla_data(tb[NL80211_TXRATE_MCS]),
5899                                         nla_len(tb[NL80211_TXRATE_MCS]),
5900                                         mask.control[band].mcs))
5901                                 return -EINVAL;
5902                 }
5903
5904                 if (mask.control[band].legacy == 0) {
5905                         /* don't allow empty legacy rates if HT
5906                          * is not even supported. */
5907                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5908                                 return -EINVAL;
5909
5910                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5911                                 if (mask.control[band].mcs[i])
5912                                         break;
5913
5914                         /* legacy and mcs rates may not be both empty */
5915                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5916                                 return -EINVAL;
5917                 }
5918         }
5919
5920         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5921 }
5922
5923 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5924 {
5925         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5926         struct net_device *dev = info->user_ptr[1];
5927         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5928
5929         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5930                 return -EINVAL;
5931
5932         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5933                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5934
5935         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5936             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5937             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5938             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5939             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5940             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5941             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5942                 return -EOPNOTSUPP;
5943
5944         /* not much point in registering if we can't reply */
5945         if (!rdev->ops->mgmt_tx)
5946                 return -EOPNOTSUPP;
5947
5948         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5949                         frame_type,
5950                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5951                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5952 }
5953
5954 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5955 {
5956         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5957         struct net_device *dev = info->user_ptr[1];
5958         struct ieee80211_channel *chan;
5959         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5960         bool channel_type_valid = false;
5961         u32 freq;
5962         int err;
5963         void *hdr = NULL;
5964         u64 cookie;
5965         struct sk_buff *msg = NULL;
5966         unsigned int wait = 0;
5967         bool offchan, no_cck, dont_wait_for_ack;
5968
5969         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5970
5971         if (!info->attrs[NL80211_ATTR_FRAME] ||
5972             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5973                 return -EINVAL;
5974
5975         if (!rdev->ops->mgmt_tx)
5976                 return -EOPNOTSUPP;
5977
5978         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5979             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5980             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5981             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5982             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5983             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5984             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5985                 return -EOPNOTSUPP;
5986
5987         if (info->attrs[NL80211_ATTR_DURATION]) {
5988                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5989                         return -EINVAL;
5990                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5991
5992                 /*
5993                  * We should wait on the channel for at least a minimum amount
5994                  * of time (10ms) but no longer than the driver supports.
5995                  */
5996                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5997                     wait > rdev->wiphy.max_remain_on_channel_duration)
5998                         return -EINVAL;
5999
6000         }
6001
6002         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
6003                 if (!nl80211_valid_channel_type(info, &channel_type))
6004                         return -EINVAL;
6005                 channel_type_valid = true;
6006         }
6007
6008         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6009
6010         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6011                 return -EINVAL;
6012
6013         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6014
6015         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6016         chan = rdev_freq_to_chan(rdev, freq, channel_type);
6017         if (chan == NULL)
6018                 return -EINVAL;
6019
6020         if (!dont_wait_for_ack) {
6021                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6022                 if (!msg)
6023                         return -ENOMEM;
6024
6025                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6026                                      NL80211_CMD_FRAME);
6027
6028                 if (IS_ERR(hdr)) {
6029                         err = PTR_ERR(hdr);
6030                         goto free_msg;
6031                 }
6032         }
6033
6034         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
6035                                     channel_type_valid, wait,
6036                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6037                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6038                                     no_cck, dont_wait_for_ack, &cookie);
6039         if (err)
6040                 goto free_msg;
6041
6042         if (msg) {
6043                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6044                         goto nla_put_failure;
6045
6046                 genlmsg_end(msg, hdr);
6047                 return genlmsg_reply(msg, info);
6048         }
6049
6050         return 0;
6051
6052  nla_put_failure:
6053         err = -ENOBUFS;
6054  free_msg:
6055         nlmsg_free(msg);
6056         return err;
6057 }
6058
6059 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6060 {
6061         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6062         struct net_device *dev = info->user_ptr[1];
6063         u64 cookie;
6064
6065         if (!info->attrs[NL80211_ATTR_COOKIE])
6066                 return -EINVAL;
6067
6068         if (!rdev->ops->mgmt_tx_cancel_wait)
6069                 return -EOPNOTSUPP;
6070
6071         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6072             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6073             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6074             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6075             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6076             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6077                 return -EOPNOTSUPP;
6078
6079         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6080
6081         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6082 }
6083
6084 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6085 {
6086         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6087         struct wireless_dev *wdev;
6088         struct net_device *dev = info->user_ptr[1];
6089         u8 ps_state;
6090         bool state;
6091         int err;
6092
6093         if (!info->attrs[NL80211_ATTR_PS_STATE])
6094                 return -EINVAL;
6095
6096         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6097
6098         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6099                 return -EINVAL;
6100
6101         wdev = dev->ieee80211_ptr;
6102
6103         if (!rdev->ops->set_power_mgmt)
6104                 return -EOPNOTSUPP;
6105
6106         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6107
6108         if (state == wdev->ps)
6109                 return 0;
6110
6111         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6112                                         wdev->ps_timeout);
6113         if (!err)
6114                 wdev->ps = state;
6115         return err;
6116 }
6117
6118 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6119 {
6120         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6121         enum nl80211_ps_state ps_state;
6122         struct wireless_dev *wdev;
6123         struct net_device *dev = info->user_ptr[1];
6124         struct sk_buff *msg;
6125         void *hdr;
6126         int err;
6127
6128         wdev = dev->ieee80211_ptr;
6129
6130         if (!rdev->ops->set_power_mgmt)
6131                 return -EOPNOTSUPP;
6132
6133         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6134         if (!msg)
6135                 return -ENOMEM;
6136
6137         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6138                              NL80211_CMD_GET_POWER_SAVE);
6139         if (!hdr) {
6140                 err = -ENOBUFS;
6141                 goto free_msg;
6142         }
6143
6144         if (wdev->ps)
6145                 ps_state = NL80211_PS_ENABLED;
6146         else
6147                 ps_state = NL80211_PS_DISABLED;
6148
6149         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6150                 goto nla_put_failure;
6151
6152         genlmsg_end(msg, hdr);
6153         return genlmsg_reply(msg, info);
6154
6155  nla_put_failure:
6156         err = -ENOBUFS;
6157  free_msg:
6158         nlmsg_free(msg);
6159         return err;
6160 }
6161
6162 static struct nla_policy
6163 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6164         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6165         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6166         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6167 };
6168
6169 static int nl80211_set_cqm_rssi(struct genl_info *info,
6170                                 s32 threshold, u32 hysteresis)
6171 {
6172         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6173         struct wireless_dev *wdev;
6174         struct net_device *dev = info->user_ptr[1];
6175
6176         if (threshold > 0)
6177                 return -EINVAL;
6178
6179         wdev = dev->ieee80211_ptr;
6180
6181         if (!rdev->ops->set_cqm_rssi_config)
6182                 return -EOPNOTSUPP;
6183
6184         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6185             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6186                 return -EOPNOTSUPP;
6187
6188         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6189                                               threshold, hysteresis);
6190 }
6191
6192 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6193 {
6194         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6195         struct nlattr *cqm;
6196         int err;
6197
6198         cqm = info->attrs[NL80211_ATTR_CQM];
6199         if (!cqm) {
6200                 err = -EINVAL;
6201                 goto out;
6202         }
6203
6204         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6205                                nl80211_attr_cqm_policy);
6206         if (err)
6207                 goto out;
6208
6209         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6210             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6211                 s32 threshold;
6212                 u32 hysteresis;
6213                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6214                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6215                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6216         } else
6217                 err = -EINVAL;
6218
6219 out:
6220         return err;
6221 }
6222
6223 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6224 {
6225         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6226         struct net_device *dev = info->user_ptr[1];
6227         struct mesh_config cfg;
6228         struct mesh_setup setup;
6229         int err;
6230
6231         /* start with default */
6232         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6233         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6234
6235         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6236                 /* and parse parameters if given */
6237                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6238                 if (err)
6239                         return err;
6240         }
6241
6242         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6243             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6244                 return -EINVAL;
6245
6246         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6247         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6248
6249         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6250             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6251                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6252                         return -EINVAL;
6253
6254         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6255                 /* parse additional setup parameters if given */
6256                 err = nl80211_parse_mesh_setup(info, &setup);
6257                 if (err)
6258                         return err;
6259         }
6260
6261         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6262                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6263
6264                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6265                     !nl80211_valid_channel_type(info, &channel_type))
6266                         return -EINVAL;
6267
6268                 setup.channel = rdev_freq_to_chan(rdev,
6269                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6270                         channel_type);
6271                 if (!setup.channel)
6272                         return -EINVAL;
6273                 setup.channel_type = channel_type;
6274         } else {
6275                 /* cfg80211_join_mesh() will sort it out */
6276                 setup.channel = NULL;
6277         }
6278
6279         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6280 }
6281
6282 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6283 {
6284         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6285         struct net_device *dev = info->user_ptr[1];
6286
6287         return cfg80211_leave_mesh(rdev, dev);
6288 }
6289
6290 #ifdef CONFIG_PM
6291 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6292 {
6293         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6294         struct sk_buff *msg;
6295         void *hdr;
6296
6297         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6298                 return -EOPNOTSUPP;
6299
6300         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6301         if (!msg)
6302                 return -ENOMEM;
6303
6304         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6305                              NL80211_CMD_GET_WOWLAN);
6306         if (!hdr)
6307                 goto nla_put_failure;
6308
6309         if (rdev->wowlan) {
6310                 struct nlattr *nl_wowlan;
6311
6312                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6313                 if (!nl_wowlan)
6314                         goto nla_put_failure;
6315
6316                 if ((rdev->wowlan->any &&
6317                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6318                     (rdev->wowlan->disconnect &&
6319                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6320                     (rdev->wowlan->magic_pkt &&
6321                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6322                     (rdev->wowlan->gtk_rekey_failure &&
6323                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6324                     (rdev->wowlan->eap_identity_req &&
6325                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6326                     (rdev->wowlan->four_way_handshake &&
6327                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6328                     (rdev->wowlan->rfkill_release &&
6329                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6330                         goto nla_put_failure;
6331                 if (rdev->wowlan->n_patterns) {
6332                         struct nlattr *nl_pats, *nl_pat;
6333                         int i, pat_len;
6334
6335                         nl_pats = nla_nest_start(msg,
6336                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6337                         if (!nl_pats)
6338                                 goto nla_put_failure;
6339
6340                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6341                                 nl_pat = nla_nest_start(msg, i + 1);
6342                                 if (!nl_pat)
6343                                         goto nla_put_failure;
6344                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6345                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6346                                             DIV_ROUND_UP(pat_len, 8),
6347                                             rdev->wowlan->patterns[i].mask) ||
6348                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6349                                             pat_len,
6350                                             rdev->wowlan->patterns[i].pattern))
6351                                         goto nla_put_failure;
6352                                 nla_nest_end(msg, nl_pat);
6353                         }
6354                         nla_nest_end(msg, nl_pats);
6355                 }
6356
6357                 nla_nest_end(msg, nl_wowlan);
6358         }
6359
6360         genlmsg_end(msg, hdr);
6361         return genlmsg_reply(msg, info);
6362
6363 nla_put_failure:
6364         nlmsg_free(msg);
6365         return -ENOBUFS;
6366 }
6367
6368 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6369 {
6370         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6371         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6372         struct cfg80211_wowlan no_triggers = {};
6373         struct cfg80211_wowlan new_triggers = {};
6374         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6375         int err, i;
6376         bool prev_enabled = rdev->wowlan;
6377
6378         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6379                 return -EOPNOTSUPP;
6380
6381         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6382                 goto no_triggers;
6383
6384         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6385                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6386                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6387                         nl80211_wowlan_policy);
6388         if (err)
6389                 return err;
6390
6391         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6392                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6393                         return -EINVAL;
6394                 new_triggers.any = true;
6395         }
6396
6397         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6398                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6399                         return -EINVAL;
6400                 new_triggers.disconnect = true;
6401         }
6402
6403         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6404                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6405                         return -EINVAL;
6406                 new_triggers.magic_pkt = true;
6407         }
6408
6409         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6410                 return -EINVAL;
6411
6412         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6413                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6414                         return -EINVAL;
6415                 new_triggers.gtk_rekey_failure = true;
6416         }
6417
6418         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6419                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6420                         return -EINVAL;
6421                 new_triggers.eap_identity_req = true;
6422         }
6423
6424         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6425                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6426                         return -EINVAL;
6427                 new_triggers.four_way_handshake = true;
6428         }
6429
6430         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6431                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6432                         return -EINVAL;
6433                 new_triggers.rfkill_release = true;
6434         }
6435
6436         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6437                 struct nlattr *pat;
6438                 int n_patterns = 0;
6439                 int rem, pat_len, mask_len;
6440                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6441
6442                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6443                                     rem)
6444                         n_patterns++;
6445                 if (n_patterns > wowlan->n_patterns)
6446                         return -EINVAL;
6447
6448                 new_triggers.patterns = kcalloc(n_patterns,
6449                                                 sizeof(new_triggers.patterns[0]),
6450                                                 GFP_KERNEL);
6451                 if (!new_triggers.patterns)
6452                         return -ENOMEM;
6453
6454                 new_triggers.n_patterns = n_patterns;
6455                 i = 0;
6456
6457                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6458                                     rem) {
6459                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6460                                   nla_data(pat), nla_len(pat), NULL);
6461                         err = -EINVAL;
6462                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6463                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6464                                 goto error;
6465                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6466                         mask_len = DIV_ROUND_UP(pat_len, 8);
6467                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6468                             mask_len)
6469                                 goto error;
6470                         if (pat_len > wowlan->pattern_max_len ||
6471                             pat_len < wowlan->pattern_min_len)
6472                                 goto error;
6473
6474                         new_triggers.patterns[i].mask =
6475                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6476                         if (!new_triggers.patterns[i].mask) {
6477                                 err = -ENOMEM;
6478                                 goto error;
6479                         }
6480                         new_triggers.patterns[i].pattern =
6481                                 new_triggers.patterns[i].mask + mask_len;
6482                         memcpy(new_triggers.patterns[i].mask,
6483                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6484                                mask_len);
6485                         new_triggers.patterns[i].pattern_len = pat_len;
6486                         memcpy(new_triggers.patterns[i].pattern,
6487                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6488                                pat_len);
6489                         i++;
6490                 }
6491         }
6492
6493         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6494                 struct cfg80211_wowlan *ntrig;
6495                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6496                                 GFP_KERNEL);
6497                 if (!ntrig) {
6498                         err = -ENOMEM;
6499                         goto error;
6500                 }
6501                 cfg80211_rdev_free_wowlan(rdev);
6502                 rdev->wowlan = ntrig;
6503         } else {
6504  no_triggers:
6505                 cfg80211_rdev_free_wowlan(rdev);
6506                 rdev->wowlan = NULL;
6507         }
6508
6509         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6510                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6511
6512         return 0;
6513  error:
6514         for (i = 0; i < new_triggers.n_patterns; i++)
6515                 kfree(new_triggers.patterns[i].mask);
6516         kfree(new_triggers.patterns);
6517         return err;
6518 }
6519 #endif
6520
6521 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6522 {
6523         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6524         struct net_device *dev = info->user_ptr[1];
6525         struct wireless_dev *wdev = dev->ieee80211_ptr;
6526         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6527         struct cfg80211_gtk_rekey_data rekey_data;
6528         int err;
6529
6530         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6531                 return -EINVAL;
6532
6533         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6534                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6535                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6536                         nl80211_rekey_policy);
6537         if (err)
6538                 return err;
6539
6540         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6541                 return -ERANGE;
6542         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6543                 return -ERANGE;
6544         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6545                 return -ERANGE;
6546
6547         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6548                NL80211_KEK_LEN);
6549         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6550                NL80211_KCK_LEN);
6551         memcpy(rekey_data.replay_ctr,
6552                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6553                NL80211_REPLAY_CTR_LEN);
6554
6555         wdev_lock(wdev);
6556         if (!wdev->current_bss) {
6557                 err = -ENOTCONN;
6558                 goto out;
6559         }
6560
6561         if (!rdev->ops->set_rekey_data) {
6562                 err = -EOPNOTSUPP;
6563                 goto out;
6564         }
6565
6566         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6567  out:
6568         wdev_unlock(wdev);
6569         return err;
6570 }
6571
6572 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6573                                              struct genl_info *info)
6574 {
6575         struct net_device *dev = info->user_ptr[1];
6576         struct wireless_dev *wdev = dev->ieee80211_ptr;
6577
6578         if (wdev->iftype != NL80211_IFTYPE_AP &&
6579             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6580                 return -EINVAL;
6581
6582         if (wdev->ap_unexpected_nlpid)
6583                 return -EBUSY;
6584
6585         wdev->ap_unexpected_nlpid = info->snd_pid;
6586         return 0;
6587 }
6588
6589 static int nl80211_probe_client(struct sk_buff *skb,
6590                                 struct genl_info *info)
6591 {
6592         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6593         struct net_device *dev = info->user_ptr[1];
6594         struct wireless_dev *wdev = dev->ieee80211_ptr;
6595         struct sk_buff *msg;
6596         void *hdr;
6597         const u8 *addr;
6598         u64 cookie;
6599         int err;
6600
6601         if (wdev->iftype != NL80211_IFTYPE_AP &&
6602             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6603                 return -EOPNOTSUPP;
6604
6605         if (!info->attrs[NL80211_ATTR_MAC])
6606                 return -EINVAL;
6607
6608         if (!rdev->ops->probe_client)
6609                 return -EOPNOTSUPP;
6610
6611         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6612         if (!msg)
6613                 return -ENOMEM;
6614
6615         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6616                              NL80211_CMD_PROBE_CLIENT);
6617
6618         if (IS_ERR(hdr)) {
6619                 err = PTR_ERR(hdr);
6620                 goto free_msg;
6621         }
6622
6623         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6624
6625         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6626         if (err)
6627                 goto free_msg;
6628
6629         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6630                 goto nla_put_failure;
6631
6632         genlmsg_end(msg, hdr);
6633
6634         return genlmsg_reply(msg, info);
6635
6636  nla_put_failure:
6637         err = -ENOBUFS;
6638  free_msg:
6639         nlmsg_free(msg);
6640         return err;
6641 }
6642
6643 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6644 {
6645         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6646
6647         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6648                 return -EOPNOTSUPP;
6649
6650         if (rdev->ap_beacons_nlpid)
6651                 return -EBUSY;
6652
6653         rdev->ap_beacons_nlpid = info->snd_pid;
6654
6655         return 0;
6656 }
6657
6658 #define NL80211_FLAG_NEED_WIPHY         0x01
6659 #define NL80211_FLAG_NEED_NETDEV        0x02
6660 #define NL80211_FLAG_NEED_RTNL          0x04
6661 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6662 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6663                                          NL80211_FLAG_CHECK_NETDEV_UP)
6664
6665 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6666                             struct genl_info *info)
6667 {
6668         struct cfg80211_registered_device *rdev;
6669         struct net_device *dev;
6670         int err;
6671         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6672
6673         if (rtnl)
6674                 rtnl_lock();
6675
6676         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6677                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6678                 if (IS_ERR(rdev)) {
6679                         if (rtnl)
6680                                 rtnl_unlock();
6681                         return PTR_ERR(rdev);
6682                 }
6683                 info->user_ptr[0] = rdev;
6684         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6685                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6686                                               &rdev, &dev);
6687                 if (err) {
6688                         if (rtnl)
6689                                 rtnl_unlock();
6690                         return err;
6691                 }
6692                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6693                     !netif_running(dev)) {
6694                         cfg80211_unlock_rdev(rdev);
6695                         dev_put(dev);
6696                         if (rtnl)
6697                                 rtnl_unlock();
6698                         return -ENETDOWN;
6699                 }
6700                 info->user_ptr[0] = rdev;
6701                 info->user_ptr[1] = dev;
6702         }
6703
6704         return 0;
6705 }
6706
6707 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6708                               struct genl_info *info)
6709 {
6710         if (info->user_ptr[0])
6711                 cfg80211_unlock_rdev(info->user_ptr[0]);
6712         if (info->user_ptr[1])
6713                 dev_put(info->user_ptr[1]);
6714         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6715                 rtnl_unlock();
6716 }
6717
6718 static struct genl_ops nl80211_ops[] = {
6719         {
6720                 .cmd = NL80211_CMD_GET_WIPHY,
6721                 .doit = nl80211_get_wiphy,
6722                 .dumpit = nl80211_dump_wiphy,
6723                 .policy = nl80211_policy,
6724                 /* can be retrieved by unprivileged users */
6725                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6726         },
6727         {
6728                 .cmd = NL80211_CMD_SET_WIPHY,
6729                 .doit = nl80211_set_wiphy,
6730                 .policy = nl80211_policy,
6731                 .flags = GENL_ADMIN_PERM,
6732                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6733         },
6734         {
6735                 .cmd = NL80211_CMD_GET_INTERFACE,
6736                 .doit = nl80211_get_interface,
6737                 .dumpit = nl80211_dump_interface,
6738                 .policy = nl80211_policy,
6739                 /* can be retrieved by unprivileged users */
6740                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6741         },
6742         {
6743                 .cmd = NL80211_CMD_SET_INTERFACE,
6744                 .doit = nl80211_set_interface,
6745                 .policy = nl80211_policy,
6746                 .flags = GENL_ADMIN_PERM,
6747                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6748                                   NL80211_FLAG_NEED_RTNL,
6749         },
6750         {
6751                 .cmd = NL80211_CMD_NEW_INTERFACE,
6752                 .doit = nl80211_new_interface,
6753                 .policy = nl80211_policy,
6754                 .flags = GENL_ADMIN_PERM,
6755                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6756                                   NL80211_FLAG_NEED_RTNL,
6757         },
6758         {
6759                 .cmd = NL80211_CMD_DEL_INTERFACE,
6760                 .doit = nl80211_del_interface,
6761                 .policy = nl80211_policy,
6762                 .flags = GENL_ADMIN_PERM,
6763                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6764                                   NL80211_FLAG_NEED_RTNL,
6765         },
6766         {
6767                 .cmd = NL80211_CMD_GET_KEY,
6768                 .doit = nl80211_get_key,
6769                 .policy = nl80211_policy,
6770                 .flags = GENL_ADMIN_PERM,
6771                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6772                                   NL80211_FLAG_NEED_RTNL,
6773         },
6774         {
6775                 .cmd = NL80211_CMD_SET_KEY,
6776                 .doit = nl80211_set_key,
6777                 .policy = nl80211_policy,
6778                 .flags = GENL_ADMIN_PERM,
6779                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6780                                   NL80211_FLAG_NEED_RTNL,
6781         },
6782         {
6783                 .cmd = NL80211_CMD_NEW_KEY,
6784                 .doit = nl80211_new_key,
6785                 .policy = nl80211_policy,
6786                 .flags = GENL_ADMIN_PERM,
6787                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6788                                   NL80211_FLAG_NEED_RTNL,
6789         },
6790         {
6791                 .cmd = NL80211_CMD_DEL_KEY,
6792                 .doit = nl80211_del_key,
6793                 .policy = nl80211_policy,
6794                 .flags = GENL_ADMIN_PERM,
6795                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6796                                   NL80211_FLAG_NEED_RTNL,
6797         },
6798         {
6799                 .cmd = NL80211_CMD_SET_BEACON,
6800                 .policy = nl80211_policy,
6801                 .flags = GENL_ADMIN_PERM,
6802                 .doit = nl80211_set_beacon,
6803                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6804                                   NL80211_FLAG_NEED_RTNL,
6805         },
6806         {
6807                 .cmd = NL80211_CMD_START_AP,
6808                 .policy = nl80211_policy,
6809                 .flags = GENL_ADMIN_PERM,
6810                 .doit = nl80211_start_ap,
6811                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6812                                   NL80211_FLAG_NEED_RTNL,
6813         },
6814         {
6815                 .cmd = NL80211_CMD_STOP_AP,
6816                 .policy = nl80211_policy,
6817                 .flags = GENL_ADMIN_PERM,
6818                 .doit = nl80211_stop_ap,
6819                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6820                                   NL80211_FLAG_NEED_RTNL,
6821         },
6822         {
6823                 .cmd = NL80211_CMD_GET_STATION,
6824                 .doit = nl80211_get_station,
6825                 .dumpit = nl80211_dump_station,
6826                 .policy = nl80211_policy,
6827                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6828                                   NL80211_FLAG_NEED_RTNL,
6829         },
6830         {
6831                 .cmd = NL80211_CMD_SET_STATION,
6832                 .doit = nl80211_set_station,
6833                 .policy = nl80211_policy,
6834                 .flags = GENL_ADMIN_PERM,
6835                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6836                                   NL80211_FLAG_NEED_RTNL,
6837         },
6838         {
6839                 .cmd = NL80211_CMD_NEW_STATION,
6840                 .doit = nl80211_new_station,
6841                 .policy = nl80211_policy,
6842                 .flags = GENL_ADMIN_PERM,
6843                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6844                                   NL80211_FLAG_NEED_RTNL,
6845         },
6846         {
6847                 .cmd = NL80211_CMD_DEL_STATION,
6848                 .doit = nl80211_del_station,
6849                 .policy = nl80211_policy,
6850                 .flags = GENL_ADMIN_PERM,
6851                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6852                                   NL80211_FLAG_NEED_RTNL,
6853         },
6854         {
6855                 .cmd = NL80211_CMD_GET_MPATH,
6856                 .doit = nl80211_get_mpath,
6857                 .dumpit = nl80211_dump_mpath,
6858                 .policy = nl80211_policy,
6859                 .flags = GENL_ADMIN_PERM,
6860                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6861                                   NL80211_FLAG_NEED_RTNL,
6862         },
6863         {
6864                 .cmd = NL80211_CMD_SET_MPATH,
6865                 .doit = nl80211_set_mpath,
6866                 .policy = nl80211_policy,
6867                 .flags = GENL_ADMIN_PERM,
6868                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6869                                   NL80211_FLAG_NEED_RTNL,
6870         },
6871         {
6872                 .cmd = NL80211_CMD_NEW_MPATH,
6873                 .doit = nl80211_new_mpath,
6874                 .policy = nl80211_policy,
6875                 .flags = GENL_ADMIN_PERM,
6876                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6877                                   NL80211_FLAG_NEED_RTNL,
6878         },
6879         {
6880                 .cmd = NL80211_CMD_DEL_MPATH,
6881                 .doit = nl80211_del_mpath,
6882                 .policy = nl80211_policy,
6883                 .flags = GENL_ADMIN_PERM,
6884                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6885                                   NL80211_FLAG_NEED_RTNL,
6886         },
6887         {
6888                 .cmd = NL80211_CMD_SET_BSS,
6889                 .doit = nl80211_set_bss,
6890                 .policy = nl80211_policy,
6891                 .flags = GENL_ADMIN_PERM,
6892                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6893                                   NL80211_FLAG_NEED_RTNL,
6894         },
6895         {
6896                 .cmd = NL80211_CMD_GET_REG,
6897                 .doit = nl80211_get_reg,
6898                 .policy = nl80211_policy,
6899                 /* can be retrieved by unprivileged users */
6900         },
6901         {
6902                 .cmd = NL80211_CMD_SET_REG,
6903                 .doit = nl80211_set_reg,
6904                 .policy = nl80211_policy,
6905                 .flags = GENL_ADMIN_PERM,
6906         },
6907         {
6908                 .cmd = NL80211_CMD_REQ_SET_REG,
6909                 .doit = nl80211_req_set_reg,
6910                 .policy = nl80211_policy,
6911                 .flags = GENL_ADMIN_PERM,
6912         },
6913         {
6914                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6915                 .doit = nl80211_get_mesh_config,
6916                 .policy = nl80211_policy,
6917                 /* can be retrieved by unprivileged users */
6918                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6919                                   NL80211_FLAG_NEED_RTNL,
6920         },
6921         {
6922                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6923                 .doit = nl80211_update_mesh_config,
6924                 .policy = nl80211_policy,
6925                 .flags = GENL_ADMIN_PERM,
6926                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6927                                   NL80211_FLAG_NEED_RTNL,
6928         },
6929         {
6930                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6931                 .doit = nl80211_trigger_scan,
6932                 .policy = nl80211_policy,
6933                 .flags = GENL_ADMIN_PERM,
6934                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6935                                   NL80211_FLAG_NEED_RTNL,
6936         },
6937         {
6938                 .cmd = NL80211_CMD_GET_SCAN,
6939                 .policy = nl80211_policy,
6940                 .dumpit = nl80211_dump_scan,
6941         },
6942         {
6943                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6944                 .doit = nl80211_start_sched_scan,
6945                 .policy = nl80211_policy,
6946                 .flags = GENL_ADMIN_PERM,
6947                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6948                                   NL80211_FLAG_NEED_RTNL,
6949         },
6950         {
6951                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6952                 .doit = nl80211_stop_sched_scan,
6953                 .policy = nl80211_policy,
6954                 .flags = GENL_ADMIN_PERM,
6955                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6956                                   NL80211_FLAG_NEED_RTNL,
6957         },
6958         {
6959                 .cmd = NL80211_CMD_AUTHENTICATE,
6960                 .doit = nl80211_authenticate,
6961                 .policy = nl80211_policy,
6962                 .flags = GENL_ADMIN_PERM,
6963                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6964                                   NL80211_FLAG_NEED_RTNL,
6965         },
6966         {
6967                 .cmd = NL80211_CMD_ASSOCIATE,
6968                 .doit = nl80211_associate,
6969                 .policy = nl80211_policy,
6970                 .flags = GENL_ADMIN_PERM,
6971                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6972                                   NL80211_FLAG_NEED_RTNL,
6973         },
6974         {
6975                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6976                 .doit = nl80211_deauthenticate,
6977                 .policy = nl80211_policy,
6978                 .flags = GENL_ADMIN_PERM,
6979                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6980                                   NL80211_FLAG_NEED_RTNL,
6981         },
6982         {
6983                 .cmd = NL80211_CMD_DISASSOCIATE,
6984                 .doit = nl80211_disassociate,
6985                 .policy = nl80211_policy,
6986                 .flags = GENL_ADMIN_PERM,
6987                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6988                                   NL80211_FLAG_NEED_RTNL,
6989         },
6990         {
6991                 .cmd = NL80211_CMD_JOIN_IBSS,
6992                 .doit = nl80211_join_ibss,
6993                 .policy = nl80211_policy,
6994                 .flags = GENL_ADMIN_PERM,
6995                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6996                                   NL80211_FLAG_NEED_RTNL,
6997         },
6998         {
6999                 .cmd = NL80211_CMD_LEAVE_IBSS,
7000                 .doit = nl80211_leave_ibss,
7001                 .policy = nl80211_policy,
7002                 .flags = GENL_ADMIN_PERM,
7003                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7004                                   NL80211_FLAG_NEED_RTNL,
7005         },
7006 #ifdef CONFIG_NL80211_TESTMODE
7007         {
7008                 .cmd = NL80211_CMD_TESTMODE,
7009                 .doit = nl80211_testmode_do,
7010                 .dumpit = nl80211_testmode_dump,
7011                 .policy = nl80211_policy,
7012                 .flags = GENL_ADMIN_PERM,
7013                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7014                                   NL80211_FLAG_NEED_RTNL,
7015         },
7016 #endif
7017         {
7018                 .cmd = NL80211_CMD_CONNECT,
7019                 .doit = nl80211_connect,
7020                 .policy = nl80211_policy,
7021                 .flags = GENL_ADMIN_PERM,
7022                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7023                                   NL80211_FLAG_NEED_RTNL,
7024         },
7025         {
7026                 .cmd = NL80211_CMD_DISCONNECT,
7027                 .doit = nl80211_disconnect,
7028                 .policy = nl80211_policy,
7029                 .flags = GENL_ADMIN_PERM,
7030                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7031                                   NL80211_FLAG_NEED_RTNL,
7032         },
7033         {
7034                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7035                 .doit = nl80211_wiphy_netns,
7036                 .policy = nl80211_policy,
7037                 .flags = GENL_ADMIN_PERM,
7038                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7039                                   NL80211_FLAG_NEED_RTNL,
7040         },
7041         {
7042                 .cmd = NL80211_CMD_GET_SURVEY,
7043                 .policy = nl80211_policy,
7044                 .dumpit = nl80211_dump_survey,
7045         },
7046         {
7047                 .cmd = NL80211_CMD_SET_PMKSA,
7048                 .doit = nl80211_setdel_pmksa,
7049                 .policy = nl80211_policy,
7050                 .flags = GENL_ADMIN_PERM,
7051                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7052                                   NL80211_FLAG_NEED_RTNL,
7053         },
7054         {
7055                 .cmd = NL80211_CMD_DEL_PMKSA,
7056                 .doit = nl80211_setdel_pmksa,
7057                 .policy = nl80211_policy,
7058                 .flags = GENL_ADMIN_PERM,
7059                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7060                                   NL80211_FLAG_NEED_RTNL,
7061         },
7062         {
7063                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7064                 .doit = nl80211_flush_pmksa,
7065                 .policy = nl80211_policy,
7066                 .flags = GENL_ADMIN_PERM,
7067                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7068                                   NL80211_FLAG_NEED_RTNL,
7069         },
7070         {
7071                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7072                 .doit = nl80211_remain_on_channel,
7073                 .policy = nl80211_policy,
7074                 .flags = GENL_ADMIN_PERM,
7075                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7076                                   NL80211_FLAG_NEED_RTNL,
7077         },
7078         {
7079                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7080                 .doit = nl80211_cancel_remain_on_channel,
7081                 .policy = nl80211_policy,
7082                 .flags = GENL_ADMIN_PERM,
7083                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7084                                   NL80211_FLAG_NEED_RTNL,
7085         },
7086         {
7087                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7088                 .doit = nl80211_set_tx_bitrate_mask,
7089                 .policy = nl80211_policy,
7090                 .flags = GENL_ADMIN_PERM,
7091                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7092                                   NL80211_FLAG_NEED_RTNL,
7093         },
7094         {
7095                 .cmd = NL80211_CMD_REGISTER_FRAME,
7096                 .doit = nl80211_register_mgmt,
7097                 .policy = nl80211_policy,
7098                 .flags = GENL_ADMIN_PERM,
7099                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7100                                   NL80211_FLAG_NEED_RTNL,
7101         },
7102         {
7103                 .cmd = NL80211_CMD_FRAME,
7104                 .doit = nl80211_tx_mgmt,
7105                 .policy = nl80211_policy,
7106                 .flags = GENL_ADMIN_PERM,
7107                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7108                                   NL80211_FLAG_NEED_RTNL,
7109         },
7110         {
7111                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7112                 .doit = nl80211_tx_mgmt_cancel_wait,
7113                 .policy = nl80211_policy,
7114                 .flags = GENL_ADMIN_PERM,
7115                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7116                                   NL80211_FLAG_NEED_RTNL,
7117         },
7118         {
7119                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7120                 .doit = nl80211_set_power_save,
7121                 .policy = nl80211_policy,
7122                 .flags = GENL_ADMIN_PERM,
7123                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7124                                   NL80211_FLAG_NEED_RTNL,
7125         },
7126         {
7127                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7128                 .doit = nl80211_get_power_save,
7129                 .policy = nl80211_policy,
7130                 /* can be retrieved by unprivileged users */
7131                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7132                                   NL80211_FLAG_NEED_RTNL,
7133         },
7134         {
7135                 .cmd = NL80211_CMD_SET_CQM,
7136                 .doit = nl80211_set_cqm,
7137                 .policy = nl80211_policy,
7138                 .flags = GENL_ADMIN_PERM,
7139                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7140                                   NL80211_FLAG_NEED_RTNL,
7141         },
7142         {
7143                 .cmd = NL80211_CMD_SET_CHANNEL,
7144                 .doit = nl80211_set_channel,
7145                 .policy = nl80211_policy,
7146                 .flags = GENL_ADMIN_PERM,
7147                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7148                                   NL80211_FLAG_NEED_RTNL,
7149         },
7150         {
7151                 .cmd = NL80211_CMD_SET_WDS_PEER,
7152                 .doit = nl80211_set_wds_peer,
7153                 .policy = nl80211_policy,
7154                 .flags = GENL_ADMIN_PERM,
7155                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7156                                   NL80211_FLAG_NEED_RTNL,
7157         },
7158         {
7159                 .cmd = NL80211_CMD_JOIN_MESH,
7160                 .doit = nl80211_join_mesh,
7161                 .policy = nl80211_policy,
7162                 .flags = GENL_ADMIN_PERM,
7163                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7164                                   NL80211_FLAG_NEED_RTNL,
7165         },
7166         {
7167                 .cmd = NL80211_CMD_LEAVE_MESH,
7168                 .doit = nl80211_leave_mesh,
7169                 .policy = nl80211_policy,
7170                 .flags = GENL_ADMIN_PERM,
7171                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7172                                   NL80211_FLAG_NEED_RTNL,
7173         },
7174 #ifdef CONFIG_PM
7175         {
7176                 .cmd = NL80211_CMD_GET_WOWLAN,
7177                 .doit = nl80211_get_wowlan,
7178                 .policy = nl80211_policy,
7179                 /* can be retrieved by unprivileged users */
7180                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7181                                   NL80211_FLAG_NEED_RTNL,
7182         },
7183         {
7184                 .cmd = NL80211_CMD_SET_WOWLAN,
7185                 .doit = nl80211_set_wowlan,
7186                 .policy = nl80211_policy,
7187                 .flags = GENL_ADMIN_PERM,
7188                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7189                                   NL80211_FLAG_NEED_RTNL,
7190         },
7191 #endif
7192         {
7193                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7194                 .doit = nl80211_set_rekey_data,
7195                 .policy = nl80211_policy,
7196                 .flags = GENL_ADMIN_PERM,
7197                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7198                                   NL80211_FLAG_NEED_RTNL,
7199         },
7200         {
7201                 .cmd = NL80211_CMD_TDLS_MGMT,
7202                 .doit = nl80211_tdls_mgmt,
7203                 .policy = nl80211_policy,
7204                 .flags = GENL_ADMIN_PERM,
7205                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7206                                   NL80211_FLAG_NEED_RTNL,
7207         },
7208         {
7209                 .cmd = NL80211_CMD_TDLS_OPER,
7210                 .doit = nl80211_tdls_oper,
7211                 .policy = nl80211_policy,
7212                 .flags = GENL_ADMIN_PERM,
7213                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7214                                   NL80211_FLAG_NEED_RTNL,
7215         },
7216         {
7217                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7218                 .doit = nl80211_register_unexpected_frame,
7219                 .policy = nl80211_policy,
7220                 .flags = GENL_ADMIN_PERM,
7221                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7222                                   NL80211_FLAG_NEED_RTNL,
7223         },
7224         {
7225                 .cmd = NL80211_CMD_PROBE_CLIENT,
7226                 .doit = nl80211_probe_client,
7227                 .policy = nl80211_policy,
7228                 .flags = GENL_ADMIN_PERM,
7229                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7230                                   NL80211_FLAG_NEED_RTNL,
7231         },
7232         {
7233                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7234                 .doit = nl80211_register_beacons,
7235                 .policy = nl80211_policy,
7236                 .flags = GENL_ADMIN_PERM,
7237                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7238                                   NL80211_FLAG_NEED_RTNL,
7239         },
7240         {
7241                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7242                 .doit = nl80211_set_noack_map,
7243                 .policy = nl80211_policy,
7244                 .flags = GENL_ADMIN_PERM,
7245                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7246                                   NL80211_FLAG_NEED_RTNL,
7247         },
7248
7249 };
7250
7251 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7252         .name = "mlme",
7253 };
7254
7255 /* multicast groups */
7256 static struct genl_multicast_group nl80211_config_mcgrp = {
7257         .name = "config",
7258 };
7259 static struct genl_multicast_group nl80211_scan_mcgrp = {
7260         .name = "scan",
7261 };
7262 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7263         .name = "regulatory",
7264 };
7265
7266 /* notification functions */
7267
7268 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7269 {
7270         struct sk_buff *msg;
7271
7272         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7273         if (!msg)
7274                 return;
7275
7276         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7277                 nlmsg_free(msg);
7278                 return;
7279         }
7280
7281         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7282                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7283 }
7284
7285 static int nl80211_add_scan_req(struct sk_buff *msg,
7286                                 struct cfg80211_registered_device *rdev)
7287 {
7288         struct cfg80211_scan_request *req = rdev->scan_req;
7289         struct nlattr *nest;
7290         int i;
7291
7292         ASSERT_RDEV_LOCK(rdev);
7293
7294         if (WARN_ON(!req))
7295                 return 0;
7296
7297         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7298         if (!nest)
7299                 goto nla_put_failure;
7300         for (i = 0; i < req->n_ssids; i++) {
7301                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7302                         goto nla_put_failure;
7303         }
7304         nla_nest_end(msg, nest);
7305
7306         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7307         if (!nest)
7308                 goto nla_put_failure;
7309         for (i = 0; i < req->n_channels; i++) {
7310                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7311                         goto nla_put_failure;
7312         }
7313         nla_nest_end(msg, nest);
7314
7315         if (req->ie &&
7316             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7317                 goto nla_put_failure;
7318
7319         return 0;
7320  nla_put_failure:
7321         return -ENOBUFS;
7322 }
7323
7324 static int nl80211_send_scan_msg(struct sk_buff *msg,
7325                                  struct cfg80211_registered_device *rdev,
7326                                  struct net_device *netdev,
7327                                  u32 pid, u32 seq, int flags,
7328                                  u32 cmd)
7329 {
7330         void *hdr;
7331
7332         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7333         if (!hdr)
7334                 return -1;
7335
7336         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7337             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7338                 goto nla_put_failure;
7339
7340         /* ignore errors and send incomplete event anyway */
7341         nl80211_add_scan_req(msg, rdev);
7342
7343         return genlmsg_end(msg, hdr);
7344
7345  nla_put_failure:
7346         genlmsg_cancel(msg, hdr);
7347         return -EMSGSIZE;
7348 }
7349
7350 static int
7351 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7352                             struct cfg80211_registered_device *rdev,
7353                             struct net_device *netdev,
7354                             u32 pid, u32 seq, int flags, u32 cmd)
7355 {
7356         void *hdr;
7357
7358         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7359         if (!hdr)
7360                 return -1;
7361
7362         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7363             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7364                 goto nla_put_failure;
7365
7366         return genlmsg_end(msg, hdr);
7367
7368  nla_put_failure:
7369         genlmsg_cancel(msg, hdr);
7370         return -EMSGSIZE;
7371 }
7372
7373 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7374                              struct net_device *netdev)
7375 {
7376         struct sk_buff *msg;
7377
7378         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7379         if (!msg)
7380                 return;
7381
7382         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7383                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7384                 nlmsg_free(msg);
7385                 return;
7386         }
7387
7388         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7389                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7390 }
7391
7392 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7393                             struct net_device *netdev)
7394 {
7395         struct sk_buff *msg;
7396
7397         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7398         if (!msg)
7399                 return;
7400
7401         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7402                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7403                 nlmsg_free(msg);
7404                 return;
7405         }
7406
7407         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7408                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7409 }
7410
7411 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7412                                struct net_device *netdev)
7413 {
7414         struct sk_buff *msg;
7415
7416         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7417         if (!msg)
7418                 return;
7419
7420         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7421                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7422                 nlmsg_free(msg);
7423                 return;
7424         }
7425
7426         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7427                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7428 }
7429
7430 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7431                                      struct net_device *netdev)
7432 {
7433         struct sk_buff *msg;
7434
7435         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7436         if (!msg)
7437                 return;
7438
7439         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7440                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7441                 nlmsg_free(msg);
7442                 return;
7443         }
7444
7445         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7446                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7447 }
7448
7449 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7450                              struct net_device *netdev, u32 cmd)
7451 {
7452         struct sk_buff *msg;
7453
7454         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7455         if (!msg)
7456                 return;
7457
7458         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7459                 nlmsg_free(msg);
7460                 return;
7461         }
7462
7463         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7464                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7465 }
7466
7467 /*
7468  * This can happen on global regulatory changes or device specific settings
7469  * based on custom world regulatory domains.
7470  */
7471 void nl80211_send_reg_change_event(struct regulatory_request *request)
7472 {
7473         struct sk_buff *msg;
7474         void *hdr;
7475
7476         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7477         if (!msg)
7478                 return;
7479
7480         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7481         if (!hdr) {
7482                 nlmsg_free(msg);
7483                 return;
7484         }
7485
7486         /* Userspace can always count this one always being set */
7487         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7488                 goto nla_put_failure;
7489
7490         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7491                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7492                                NL80211_REGDOM_TYPE_WORLD))
7493                         goto nla_put_failure;
7494         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7495                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7496                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7497                         goto nla_put_failure;
7498         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7499                    request->intersect) {
7500                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7501                                NL80211_REGDOM_TYPE_INTERSECTION))
7502                         goto nla_put_failure;
7503         } else {
7504                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7505                                NL80211_REGDOM_TYPE_COUNTRY) ||
7506                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7507                                    request->alpha2))
7508                         goto nla_put_failure;
7509         }
7510
7511         if (wiphy_idx_valid(request->wiphy_idx) &&
7512             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7513                 goto nla_put_failure;
7514
7515         genlmsg_end(msg, hdr);
7516
7517         rcu_read_lock();
7518         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7519                                 GFP_ATOMIC);
7520         rcu_read_unlock();
7521
7522         return;
7523
7524 nla_put_failure:
7525         genlmsg_cancel(msg, hdr);
7526         nlmsg_free(msg);
7527 }
7528
7529 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7530                                     struct net_device *netdev,
7531                                     const u8 *buf, size_t len,
7532                                     enum nl80211_commands cmd, gfp_t gfp)
7533 {
7534         struct sk_buff *msg;
7535         void *hdr;
7536
7537         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7538         if (!msg)
7539                 return;
7540
7541         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7542         if (!hdr) {
7543                 nlmsg_free(msg);
7544                 return;
7545         }
7546
7547         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7548             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7549             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7550                 goto nla_put_failure;
7551
7552         genlmsg_end(msg, hdr);
7553
7554         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7555                                 nl80211_mlme_mcgrp.id, gfp);
7556         return;
7557
7558  nla_put_failure:
7559         genlmsg_cancel(msg, hdr);
7560         nlmsg_free(msg);
7561 }
7562
7563 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7564                           struct net_device *netdev, const u8 *buf,
7565                           size_t len, gfp_t gfp)
7566 {
7567         nl80211_send_mlme_event(rdev, netdev, buf, len,
7568                                 NL80211_CMD_AUTHENTICATE, gfp);
7569 }
7570
7571 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7572                            struct net_device *netdev, const u8 *buf,
7573                            size_t len, gfp_t gfp)
7574 {
7575         nl80211_send_mlme_event(rdev, netdev, buf, len,
7576                                 NL80211_CMD_ASSOCIATE, gfp);
7577 }
7578
7579 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7580                          struct net_device *netdev, const u8 *buf,
7581                          size_t len, gfp_t gfp)
7582 {
7583         nl80211_send_mlme_event(rdev, netdev, buf, len,
7584                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7585 }
7586
7587 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7588                            struct net_device *netdev, const u8 *buf,
7589                            size_t len, gfp_t gfp)
7590 {
7591         nl80211_send_mlme_event(rdev, netdev, buf, len,
7592                                 NL80211_CMD_DISASSOCIATE, gfp);
7593 }
7594
7595 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7596                                 struct net_device *netdev, const u8 *buf,
7597                                 size_t len, gfp_t gfp)
7598 {
7599         nl80211_send_mlme_event(rdev, netdev, buf, len,
7600                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7601 }
7602
7603 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7604                                   struct net_device *netdev, const u8 *buf,
7605                                   size_t len, gfp_t gfp)
7606 {
7607         nl80211_send_mlme_event(rdev, netdev, buf, len,
7608                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7609 }
7610
7611 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7612                                       struct net_device *netdev, int cmd,
7613                                       const u8 *addr, gfp_t gfp)
7614 {
7615         struct sk_buff *msg;
7616         void *hdr;
7617
7618         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7619         if (!msg)
7620                 return;
7621
7622         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7623         if (!hdr) {
7624                 nlmsg_free(msg);
7625                 return;
7626         }
7627
7628         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7629             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7630             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7631             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7632                 goto nla_put_failure;
7633
7634         genlmsg_end(msg, hdr);
7635
7636         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7637                                 nl80211_mlme_mcgrp.id, gfp);
7638         return;
7639
7640  nla_put_failure:
7641         genlmsg_cancel(msg, hdr);
7642         nlmsg_free(msg);
7643 }
7644
7645 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7646                                struct net_device *netdev, const u8 *addr,
7647                                gfp_t gfp)
7648 {
7649         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7650                                   addr, gfp);
7651 }
7652
7653 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7654                                 struct net_device *netdev, const u8 *addr,
7655                                 gfp_t gfp)
7656 {
7657         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7658                                   addr, gfp);
7659 }
7660
7661 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7662                                  struct net_device *netdev, const u8 *bssid,
7663                                  const u8 *req_ie, size_t req_ie_len,
7664                                  const u8 *resp_ie, size_t resp_ie_len,
7665                                  u16 status, gfp_t gfp)
7666 {
7667         struct sk_buff *msg;
7668         void *hdr;
7669
7670         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7671         if (!msg)
7672                 return;
7673
7674         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7675         if (!hdr) {
7676                 nlmsg_free(msg);
7677                 return;
7678         }
7679
7680         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7681             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7682             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7683             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7684             (req_ie &&
7685              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7686             (resp_ie &&
7687              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7688                 goto nla_put_failure;
7689
7690         genlmsg_end(msg, hdr);
7691
7692         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7693                                 nl80211_mlme_mcgrp.id, gfp);
7694         return;
7695
7696  nla_put_failure:
7697         genlmsg_cancel(msg, hdr);
7698         nlmsg_free(msg);
7699
7700 }
7701
7702 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7703                          struct net_device *netdev, const u8 *bssid,
7704                          const u8 *req_ie, size_t req_ie_len,
7705                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7706 {
7707         struct sk_buff *msg;
7708         void *hdr;
7709
7710         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7711         if (!msg)
7712                 return;
7713
7714         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7715         if (!hdr) {
7716                 nlmsg_free(msg);
7717                 return;
7718         }
7719
7720         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7721             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7722             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7723             (req_ie &&
7724              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7725             (resp_ie &&
7726              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7727                 goto nla_put_failure;
7728
7729         genlmsg_end(msg, hdr);
7730
7731         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7732                                 nl80211_mlme_mcgrp.id, gfp);
7733         return;
7734
7735  nla_put_failure:
7736         genlmsg_cancel(msg, hdr);
7737         nlmsg_free(msg);
7738
7739 }
7740
7741 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7742                                struct net_device *netdev, u16 reason,
7743                                const u8 *ie, size_t ie_len, bool from_ap)
7744 {
7745         struct sk_buff *msg;
7746         void *hdr;
7747
7748         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7749         if (!msg)
7750                 return;
7751
7752         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7753         if (!hdr) {
7754                 nlmsg_free(msg);
7755                 return;
7756         }
7757
7758         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7759             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7760             (from_ap && reason &&
7761              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7762             (from_ap &&
7763              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7764             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7765                 goto nla_put_failure;
7766
7767         genlmsg_end(msg, hdr);
7768
7769         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7770                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7771         return;
7772
7773  nla_put_failure:
7774         genlmsg_cancel(msg, hdr);
7775         nlmsg_free(msg);
7776
7777 }
7778
7779 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7780                              struct net_device *netdev, const u8 *bssid,
7781                              gfp_t gfp)
7782 {
7783         struct sk_buff *msg;
7784         void *hdr;
7785
7786         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7787         if (!msg)
7788                 return;
7789
7790         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7791         if (!hdr) {
7792                 nlmsg_free(msg);
7793                 return;
7794         }
7795
7796         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7797             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7798             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7799                 goto nla_put_failure;
7800
7801         genlmsg_end(msg, hdr);
7802
7803         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7804                                 nl80211_mlme_mcgrp.id, gfp);
7805         return;
7806
7807  nla_put_failure:
7808         genlmsg_cancel(msg, hdr);
7809         nlmsg_free(msg);
7810 }
7811
7812 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7813                 struct net_device *netdev,
7814                 const u8 *macaddr, const u8* ie, u8 ie_len,
7815                 gfp_t gfp)
7816 {
7817         struct sk_buff *msg;
7818         void *hdr;
7819
7820         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7821         if (!msg)
7822                 return;
7823
7824         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7825         if (!hdr) {
7826                 nlmsg_free(msg);
7827                 return;
7828         }
7829
7830         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7831             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7832             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7833             (ie_len && ie &&
7834              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7835                 goto nla_put_failure;
7836
7837         genlmsg_end(msg, hdr);
7838
7839         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7840                                 nl80211_mlme_mcgrp.id, gfp);
7841         return;
7842
7843  nla_put_failure:
7844         genlmsg_cancel(msg, hdr);
7845         nlmsg_free(msg);
7846 }
7847
7848 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7849                                  struct net_device *netdev, const u8 *addr,
7850                                  enum nl80211_key_type key_type, int key_id,
7851                                  const u8 *tsc, gfp_t gfp)
7852 {
7853         struct sk_buff *msg;
7854         void *hdr;
7855
7856         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7857         if (!msg)
7858                 return;
7859
7860         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7861         if (!hdr) {
7862                 nlmsg_free(msg);
7863                 return;
7864         }
7865
7866         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7867             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7868             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7869             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7870             (key_id != -1 &&
7871              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7872             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7873                 goto nla_put_failure;
7874
7875         genlmsg_end(msg, hdr);
7876
7877         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7878                                 nl80211_mlme_mcgrp.id, gfp);
7879         return;
7880
7881  nla_put_failure:
7882         genlmsg_cancel(msg, hdr);
7883         nlmsg_free(msg);
7884 }
7885
7886 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7887                                     struct ieee80211_channel *channel_before,
7888                                     struct ieee80211_channel *channel_after)
7889 {
7890         struct sk_buff *msg;
7891         void *hdr;
7892         struct nlattr *nl_freq;
7893
7894         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7895         if (!msg)
7896                 return;
7897
7898         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7899         if (!hdr) {
7900                 nlmsg_free(msg);
7901                 return;
7902         }
7903
7904         /*
7905          * Since we are applying the beacon hint to a wiphy we know its
7906          * wiphy_idx is valid
7907          */
7908         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7909                 goto nla_put_failure;
7910
7911         /* Before */
7912         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7913         if (!nl_freq)
7914                 goto nla_put_failure;
7915         if (nl80211_msg_put_channel(msg, channel_before))
7916                 goto nla_put_failure;
7917         nla_nest_end(msg, nl_freq);
7918
7919         /* After */
7920         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7921         if (!nl_freq)
7922                 goto nla_put_failure;
7923         if (nl80211_msg_put_channel(msg, channel_after))
7924                 goto nla_put_failure;
7925         nla_nest_end(msg, nl_freq);
7926
7927         genlmsg_end(msg, hdr);
7928
7929         rcu_read_lock();
7930         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7931                                 GFP_ATOMIC);
7932         rcu_read_unlock();
7933
7934         return;
7935
7936 nla_put_failure:
7937         genlmsg_cancel(msg, hdr);
7938         nlmsg_free(msg);
7939 }
7940
7941 static void nl80211_send_remain_on_chan_event(
7942         int cmd, struct cfg80211_registered_device *rdev,
7943         struct net_device *netdev, u64 cookie,
7944         struct ieee80211_channel *chan,
7945         enum nl80211_channel_type channel_type,
7946         unsigned int duration, gfp_t gfp)
7947 {
7948         struct sk_buff *msg;
7949         void *hdr;
7950
7951         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7952         if (!msg)
7953                 return;
7954
7955         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7956         if (!hdr) {
7957                 nlmsg_free(msg);
7958                 return;
7959         }
7960
7961         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7962             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7963             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7964             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7965             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7966                 goto nla_put_failure;
7967
7968         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7969             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7970                 goto nla_put_failure;
7971
7972         genlmsg_end(msg, hdr);
7973
7974         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7975                                 nl80211_mlme_mcgrp.id, gfp);
7976         return;
7977
7978  nla_put_failure:
7979         genlmsg_cancel(msg, hdr);
7980         nlmsg_free(msg);
7981 }
7982
7983 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7984                                     struct net_device *netdev, u64 cookie,
7985                                     struct ieee80211_channel *chan,
7986                                     enum nl80211_channel_type channel_type,
7987                                     unsigned int duration, gfp_t gfp)
7988 {
7989         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7990                                           rdev, netdev, cookie, chan,
7991                                           channel_type, duration, gfp);
7992 }
7993
7994 void nl80211_send_remain_on_channel_cancel(
7995         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7996         u64 cookie, struct ieee80211_channel *chan,
7997         enum nl80211_channel_type channel_type, gfp_t gfp)
7998 {
7999         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8000                                           rdev, netdev, cookie, chan,
8001                                           channel_type, 0, gfp);
8002 }
8003
8004 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8005                             struct net_device *dev, const u8 *mac_addr,
8006                             struct station_info *sinfo, gfp_t gfp)
8007 {
8008         struct sk_buff *msg;
8009
8010         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8011         if (!msg)
8012                 return;
8013
8014         if (nl80211_send_station(msg, 0, 0, 0,
8015                                  rdev, dev, mac_addr, sinfo) < 0) {
8016                 nlmsg_free(msg);
8017                 return;
8018         }
8019
8020         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8021                                 nl80211_mlme_mcgrp.id, gfp);
8022 }
8023
8024 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8025                                 struct net_device *dev, const u8 *mac_addr,
8026                                 gfp_t gfp)
8027 {
8028         struct sk_buff *msg;
8029         void *hdr;
8030
8031         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8032         if (!msg)
8033                 return;
8034
8035         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8036         if (!hdr) {
8037                 nlmsg_free(msg);
8038                 return;
8039         }
8040
8041         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8042             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8043                 goto nla_put_failure;
8044
8045         genlmsg_end(msg, hdr);
8046
8047         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8048                                 nl80211_mlme_mcgrp.id, gfp);
8049         return;
8050
8051  nla_put_failure:
8052         genlmsg_cancel(msg, hdr);
8053         nlmsg_free(msg);
8054 }
8055
8056 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8057                                        const u8 *addr, gfp_t gfp)
8058 {
8059         struct wireless_dev *wdev = dev->ieee80211_ptr;
8060         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8061         struct sk_buff *msg;
8062         void *hdr;
8063         int err;
8064         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8065
8066         if (!nlpid)
8067                 return false;
8068
8069         msg = nlmsg_new(100, gfp);
8070         if (!msg)
8071                 return true;
8072
8073         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8074         if (!hdr) {
8075                 nlmsg_free(msg);
8076                 return true;
8077         }
8078
8079         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8080             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8081             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8082                 goto nla_put_failure;
8083
8084         err = genlmsg_end(msg, hdr);
8085         if (err < 0) {
8086                 nlmsg_free(msg);
8087                 return true;
8088         }
8089
8090         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8091         return true;
8092
8093  nla_put_failure:
8094         genlmsg_cancel(msg, hdr);
8095         nlmsg_free(msg);
8096         return true;
8097 }
8098
8099 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8100 {
8101         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8102                                           addr, gfp);
8103 }
8104
8105 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8106                                     const u8 *addr, gfp_t gfp)
8107 {
8108         return __nl80211_unexpected_frame(dev,
8109                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8110                                           addr, gfp);
8111 }
8112
8113 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8114                       struct net_device *netdev, u32 nlpid,
8115                       int freq, int sig_dbm,
8116                       const u8 *buf, size_t len, gfp_t gfp)
8117 {
8118         struct sk_buff *msg;
8119         void *hdr;
8120
8121         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8122         if (!msg)
8123                 return -ENOMEM;
8124
8125         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8126         if (!hdr) {
8127                 nlmsg_free(msg);
8128                 return -ENOMEM;
8129         }
8130
8131         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8132             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8133             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8134             (sig_dbm &&
8135              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8136             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8137                 goto nla_put_failure;
8138
8139         genlmsg_end(msg, hdr);
8140
8141         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8142
8143  nla_put_failure:
8144         genlmsg_cancel(msg, hdr);
8145         nlmsg_free(msg);
8146         return -ENOBUFS;
8147 }
8148
8149 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8150                                  struct net_device *netdev, u64 cookie,
8151                                  const u8 *buf, size_t len, bool ack,
8152                                  gfp_t gfp)
8153 {
8154         struct sk_buff *msg;
8155         void *hdr;
8156
8157         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8158         if (!msg)
8159                 return;
8160
8161         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8162         if (!hdr) {
8163                 nlmsg_free(msg);
8164                 return;
8165         }
8166
8167         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8168             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8169             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8170             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8171             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8172                 goto nla_put_failure;
8173
8174         genlmsg_end(msg, hdr);
8175
8176         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8177         return;
8178
8179  nla_put_failure:
8180         genlmsg_cancel(msg, hdr);
8181         nlmsg_free(msg);
8182 }
8183
8184 void
8185 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8186                              struct net_device *netdev,
8187                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8188                              gfp_t gfp)
8189 {
8190         struct sk_buff *msg;
8191         struct nlattr *pinfoattr;
8192         void *hdr;
8193
8194         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8195         if (!msg)
8196                 return;
8197
8198         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8199         if (!hdr) {
8200                 nlmsg_free(msg);
8201                 return;
8202         }
8203
8204         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8205             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8206                 goto nla_put_failure;
8207
8208         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8209         if (!pinfoattr)
8210                 goto nla_put_failure;
8211
8212         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8213                         rssi_event))
8214                 goto nla_put_failure;
8215
8216         nla_nest_end(msg, pinfoattr);
8217
8218         genlmsg_end(msg, hdr);
8219
8220         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8221                                 nl80211_mlme_mcgrp.id, gfp);
8222         return;
8223
8224  nla_put_failure:
8225         genlmsg_cancel(msg, hdr);
8226         nlmsg_free(msg);
8227 }
8228
8229 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8230                               struct net_device *netdev, const u8 *bssid,
8231                               const u8 *replay_ctr, gfp_t gfp)
8232 {
8233         struct sk_buff *msg;
8234         struct nlattr *rekey_attr;
8235         void *hdr;
8236
8237         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8238         if (!msg)
8239                 return;
8240
8241         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8242         if (!hdr) {
8243                 nlmsg_free(msg);
8244                 return;
8245         }
8246
8247         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8248             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8249             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8250                 goto nla_put_failure;
8251
8252         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8253         if (!rekey_attr)
8254                 goto nla_put_failure;
8255
8256         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8257                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8258                 goto nla_put_failure;
8259
8260         nla_nest_end(msg, rekey_attr);
8261
8262         genlmsg_end(msg, hdr);
8263
8264         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8265                                 nl80211_mlme_mcgrp.id, gfp);
8266         return;
8267
8268  nla_put_failure:
8269         genlmsg_cancel(msg, hdr);
8270         nlmsg_free(msg);
8271 }
8272
8273 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8274                                     struct net_device *netdev, int index,
8275                                     const u8 *bssid, bool preauth, gfp_t gfp)
8276 {
8277         struct sk_buff *msg;
8278         struct nlattr *attr;
8279         void *hdr;
8280
8281         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8282         if (!msg)
8283                 return;
8284
8285         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8286         if (!hdr) {
8287                 nlmsg_free(msg);
8288                 return;
8289         }
8290
8291         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8292             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8293                 goto nla_put_failure;
8294
8295         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8296         if (!attr)
8297                 goto nla_put_failure;
8298
8299         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8300             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8301             (preauth &&
8302              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8303                 goto nla_put_failure;
8304
8305         nla_nest_end(msg, attr);
8306
8307         genlmsg_end(msg, hdr);
8308
8309         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8310                                 nl80211_mlme_mcgrp.id, gfp);
8311         return;
8312
8313  nla_put_failure:
8314         genlmsg_cancel(msg, hdr);
8315         nlmsg_free(msg);
8316 }
8317
8318 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8319                               struct net_device *netdev, int freq,
8320                               enum nl80211_channel_type type, gfp_t gfp)
8321 {
8322         struct sk_buff *msg;
8323         void *hdr;
8324
8325         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8326         if (!msg)
8327                 return;
8328
8329         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8330         if (!hdr) {
8331                 nlmsg_free(msg);
8332                 return;
8333         }
8334
8335         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8336             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8337             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8338                 goto nla_put_failure;
8339
8340         genlmsg_end(msg, hdr);
8341
8342         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8343                                 nl80211_mlme_mcgrp.id, gfp);
8344         return;
8345
8346  nla_put_failure:
8347         genlmsg_cancel(msg, hdr);
8348         nlmsg_free(msg);
8349 }
8350
8351 void
8352 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8353                                 struct net_device *netdev, const u8 *peer,
8354                                 u32 num_packets, gfp_t gfp)
8355 {
8356         struct sk_buff *msg;
8357         struct nlattr *pinfoattr;
8358         void *hdr;
8359
8360         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8361         if (!msg)
8362                 return;
8363
8364         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8365         if (!hdr) {
8366                 nlmsg_free(msg);
8367                 return;
8368         }
8369
8370         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8371             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8372             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8373                 goto nla_put_failure;
8374
8375         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8376         if (!pinfoattr)
8377                 goto nla_put_failure;
8378
8379         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8380                 goto nla_put_failure;
8381
8382         nla_nest_end(msg, pinfoattr);
8383
8384         genlmsg_end(msg, hdr);
8385
8386         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8387                                 nl80211_mlme_mcgrp.id, gfp);
8388         return;
8389
8390  nla_put_failure:
8391         genlmsg_cancel(msg, hdr);
8392         nlmsg_free(msg);
8393 }
8394
8395 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8396                            u64 cookie, bool acked, gfp_t gfp)
8397 {
8398         struct wireless_dev *wdev = dev->ieee80211_ptr;
8399         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8400         struct sk_buff *msg;
8401         void *hdr;
8402         int err;
8403
8404         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8405         if (!msg)
8406                 return;
8407
8408         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8409         if (!hdr) {
8410                 nlmsg_free(msg);
8411                 return;
8412         }
8413
8414         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8415             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8416             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8417             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8418             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8419                 goto nla_put_failure;
8420
8421         err = genlmsg_end(msg, hdr);
8422         if (err < 0) {
8423                 nlmsg_free(msg);
8424                 return;
8425         }
8426
8427         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8428                                 nl80211_mlme_mcgrp.id, gfp);
8429         return;
8430
8431  nla_put_failure:
8432         genlmsg_cancel(msg, hdr);
8433         nlmsg_free(msg);
8434 }
8435 EXPORT_SYMBOL(cfg80211_probe_status);
8436
8437 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8438                                  const u8 *frame, size_t len,
8439                                  int freq, int sig_dbm, gfp_t gfp)
8440 {
8441         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8442         struct sk_buff *msg;
8443         void *hdr;
8444         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8445
8446         if (!nlpid)
8447                 return;
8448
8449         msg = nlmsg_new(len + 100, gfp);
8450         if (!msg)
8451                 return;
8452
8453         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8454         if (!hdr) {
8455                 nlmsg_free(msg);
8456                 return;
8457         }
8458
8459         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8460             (freq &&
8461              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8462             (sig_dbm &&
8463              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8464             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8465                 goto nla_put_failure;
8466
8467         genlmsg_end(msg, hdr);
8468
8469         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8470         return;
8471
8472  nla_put_failure:
8473         genlmsg_cancel(msg, hdr);
8474         nlmsg_free(msg);
8475 }
8476 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8477
8478 static int nl80211_netlink_notify(struct notifier_block * nb,
8479                                   unsigned long state,
8480                                   void *_notify)
8481 {
8482         struct netlink_notify *notify = _notify;
8483         struct cfg80211_registered_device *rdev;
8484         struct wireless_dev *wdev;
8485
8486         if (state != NETLINK_URELEASE)
8487                 return NOTIFY_DONE;
8488
8489         rcu_read_lock();
8490
8491         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8492                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8493                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8494                 if (rdev->ap_beacons_nlpid == notify->pid)
8495                         rdev->ap_beacons_nlpid = 0;
8496         }
8497
8498         rcu_read_unlock();
8499
8500         return NOTIFY_DONE;
8501 }
8502
8503 static struct notifier_block nl80211_netlink_notifier = {
8504         .notifier_call = nl80211_netlink_notify,
8505 };
8506
8507 /* initialisation/exit functions */
8508
8509 int nl80211_init(void)
8510 {
8511         int err;
8512
8513         err = genl_register_family_with_ops(&nl80211_fam,
8514                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8515         if (err)
8516                 return err;
8517
8518         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8519         if (err)
8520                 goto err_out;
8521
8522         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8523         if (err)
8524                 goto err_out;
8525
8526         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8527         if (err)
8528                 goto err_out;
8529
8530         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8531         if (err)
8532                 goto err_out;
8533
8534 #ifdef CONFIG_NL80211_TESTMODE
8535         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8536         if (err)
8537                 goto err_out;
8538 #endif
8539
8540         err = netlink_register_notifier(&nl80211_netlink_notifier);
8541         if (err)
8542                 goto err_out;
8543
8544         return 0;
8545  err_out:
8546         genl_unregister_family(&nl80211_fam);
8547         return err;
8548 }
8549
8550 void nl80211_exit(void)
8551 {
8552         netlink_unregister_notifier(&nl80211_netlink_notifier);
8553         genl_unregister_family(&nl80211_fam);
8554 }