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->monitor_channel) {
1693                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1694                                 rdev->monitor_channel->center_freq) ||
1695                     nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1696                                 rdev->monitor_channel_type))
1697                         goto nla_put_failure;
1698         }
1699
1700         return genlmsg_end(msg, hdr);
1701
1702  nla_put_failure:
1703         genlmsg_cancel(msg, hdr);
1704         return -EMSGSIZE;
1705 }
1706
1707 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1708 {
1709         int wp_idx = 0;
1710         int if_idx = 0;
1711         int wp_start = cb->args[0];
1712         int if_start = cb->args[1];
1713         struct cfg80211_registered_device *rdev;
1714         struct wireless_dev *wdev;
1715
1716         mutex_lock(&cfg80211_mutex);
1717         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1718                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1719                         continue;
1720                 if (wp_idx < wp_start) {
1721                         wp_idx++;
1722                         continue;
1723                 }
1724                 if_idx = 0;
1725
1726                 mutex_lock(&rdev->devlist_mtx);
1727                 list_for_each_entry(wdev, &rdev->netdev_list, list) {
1728                         if (if_idx < if_start) {
1729                                 if_idx++;
1730                                 continue;
1731                         }
1732                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1733                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1734                                                rdev, wdev->netdev) < 0) {
1735                                 mutex_unlock(&rdev->devlist_mtx);
1736                                 goto out;
1737                         }
1738                         if_idx++;
1739                 }
1740                 mutex_unlock(&rdev->devlist_mtx);
1741
1742                 wp_idx++;
1743         }
1744  out:
1745         mutex_unlock(&cfg80211_mutex);
1746
1747         cb->args[0] = wp_idx;
1748         cb->args[1] = if_idx;
1749
1750         return skb->len;
1751 }
1752
1753 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1754 {
1755         struct sk_buff *msg;
1756         struct cfg80211_registered_device *dev = info->user_ptr[0];
1757         struct net_device *netdev = info->user_ptr[1];
1758
1759         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1760         if (!msg)
1761                 return -ENOMEM;
1762
1763         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1764                                dev, netdev) < 0) {
1765                 nlmsg_free(msg);
1766                 return -ENOBUFS;
1767         }
1768
1769         return genlmsg_reply(msg, info);
1770 }
1771
1772 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1773         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1774         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1775         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1776         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1777         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1778 };
1779
1780 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1781 {
1782         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1783         int flag;
1784
1785         *mntrflags = 0;
1786
1787         if (!nla)
1788                 return -EINVAL;
1789
1790         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1791                              nla, mntr_flags_policy))
1792                 return -EINVAL;
1793
1794         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1795                 if (flags[flag])
1796                         *mntrflags |= (1<<flag);
1797
1798         return 0;
1799 }
1800
1801 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1802                                struct net_device *netdev, u8 use_4addr,
1803                                enum nl80211_iftype iftype)
1804 {
1805         if (!use_4addr) {
1806                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1807                         return -EBUSY;
1808                 return 0;
1809         }
1810
1811         switch (iftype) {
1812         case NL80211_IFTYPE_AP_VLAN:
1813                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1814                         return 0;
1815                 break;
1816         case NL80211_IFTYPE_STATION:
1817                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1818                         return 0;
1819                 break;
1820         default:
1821                 break;
1822         }
1823
1824         return -EOPNOTSUPP;
1825 }
1826
1827 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1828 {
1829         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1830         struct vif_params params;
1831         int err;
1832         enum nl80211_iftype otype, ntype;
1833         struct net_device *dev = info->user_ptr[1];
1834         u32 _flags, *flags = NULL;
1835         bool change = false;
1836
1837         memset(&params, 0, sizeof(params));
1838
1839         otype = ntype = dev->ieee80211_ptr->iftype;
1840
1841         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1842                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1843                 if (otype != ntype)
1844                         change = true;
1845                 if (ntype > NL80211_IFTYPE_MAX)
1846                         return -EINVAL;
1847         }
1848
1849         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1850                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1851
1852                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1853                         return -EINVAL;
1854                 if (netif_running(dev))
1855                         return -EBUSY;
1856
1857                 wdev_lock(wdev);
1858                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1859                              IEEE80211_MAX_MESH_ID_LEN);
1860                 wdev->mesh_id_up_len =
1861                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1862                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1863                        wdev->mesh_id_up_len);
1864                 wdev_unlock(wdev);
1865         }
1866
1867         if (info->attrs[NL80211_ATTR_4ADDR]) {
1868                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1869                 change = true;
1870                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1871                 if (err)
1872                         return err;
1873         } else {
1874                 params.use_4addr = -1;
1875         }
1876
1877         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1878                 if (ntype != NL80211_IFTYPE_MONITOR)
1879                         return -EINVAL;
1880                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1881                                           &_flags);
1882                 if (err)
1883                         return err;
1884
1885                 flags = &_flags;
1886                 change = true;
1887         }
1888
1889         if (change)
1890                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1891         else
1892                 err = 0;
1893
1894         if (!err && params.use_4addr != -1)
1895                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1896
1897         return err;
1898 }
1899
1900 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1901 {
1902         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1903         struct vif_params params;
1904         struct net_device *dev;
1905         int err;
1906         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1907         u32 flags;
1908
1909         memset(&params, 0, sizeof(params));
1910
1911         if (!info->attrs[NL80211_ATTR_IFNAME])
1912                 return -EINVAL;
1913
1914         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1915                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1916                 if (type > NL80211_IFTYPE_MAX)
1917                         return -EINVAL;
1918         }
1919
1920         if (!rdev->ops->add_virtual_intf ||
1921             !(rdev->wiphy.interface_modes & (1 << type)))
1922                 return -EOPNOTSUPP;
1923
1924         if (info->attrs[NL80211_ATTR_4ADDR]) {
1925                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1926                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1927                 if (err)
1928                         return err;
1929         }
1930
1931         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1932                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1933                                   &flags);
1934         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1935                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1936                 type, err ? NULL : &flags, &params);
1937         if (IS_ERR(dev))
1938                 return PTR_ERR(dev);
1939
1940         if (type == NL80211_IFTYPE_MESH_POINT &&
1941             info->attrs[NL80211_ATTR_MESH_ID]) {
1942                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1943
1944                 wdev_lock(wdev);
1945                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1946                              IEEE80211_MAX_MESH_ID_LEN);
1947                 wdev->mesh_id_up_len =
1948                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1949                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1950                        wdev->mesh_id_up_len);
1951                 wdev_unlock(wdev);
1952         }
1953
1954         return 0;
1955 }
1956
1957 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
1958 {
1959         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1960         struct net_device *dev = info->user_ptr[1];
1961
1962         if (!rdev->ops->del_virtual_intf)
1963                 return -EOPNOTSUPP;
1964
1965         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
1966 }
1967
1968 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
1969 {
1970         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1971         struct net_device *dev = info->user_ptr[1];
1972         u16 noack_map;
1973
1974         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
1975                 return -EINVAL;
1976
1977         if (!rdev->ops->set_noack_map)
1978                 return -EOPNOTSUPP;
1979
1980         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
1981
1982         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
1983 }
1984
1985 struct get_key_cookie {
1986         struct sk_buff *msg;
1987         int error;
1988         int idx;
1989 };
1990
1991 static void get_key_callback(void *c, struct key_params *params)
1992 {
1993         struct nlattr *key;
1994         struct get_key_cookie *cookie = c;
1995
1996         if ((params->key &&
1997              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
1998                      params->key_len, params->key)) ||
1999             (params->seq &&
2000              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2001                      params->seq_len, params->seq)) ||
2002             (params->cipher &&
2003              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2004                          params->cipher)))
2005                 goto nla_put_failure;
2006
2007         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2008         if (!key)
2009                 goto nla_put_failure;
2010
2011         if ((params->key &&
2012              nla_put(cookie->msg, NL80211_KEY_DATA,
2013                      params->key_len, params->key)) ||
2014             (params->seq &&
2015              nla_put(cookie->msg, NL80211_KEY_SEQ,
2016                      params->seq_len, params->seq)) ||
2017             (params->cipher &&
2018              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2019                          params->cipher)))
2020                 goto nla_put_failure;
2021
2022         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2023                 goto nla_put_failure;
2024
2025         nla_nest_end(cookie->msg, key);
2026
2027         return;
2028  nla_put_failure:
2029         cookie->error = 1;
2030 }
2031
2032 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2033 {
2034         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2035         int err;
2036         struct net_device *dev = info->user_ptr[1];
2037         u8 key_idx = 0;
2038         const u8 *mac_addr = NULL;
2039         bool pairwise;
2040         struct get_key_cookie cookie = {
2041                 .error = 0,
2042         };
2043         void *hdr;
2044         struct sk_buff *msg;
2045
2046         if (info->attrs[NL80211_ATTR_KEY_IDX])
2047                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2048
2049         if (key_idx > 5)
2050                 return -EINVAL;
2051
2052         if (info->attrs[NL80211_ATTR_MAC])
2053                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2054
2055         pairwise = !!mac_addr;
2056         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2057                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2058                 if (kt >= NUM_NL80211_KEYTYPES)
2059                         return -EINVAL;
2060                 if (kt != NL80211_KEYTYPE_GROUP &&
2061                     kt != NL80211_KEYTYPE_PAIRWISE)
2062                         return -EINVAL;
2063                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2064         }
2065
2066         if (!rdev->ops->get_key)
2067                 return -EOPNOTSUPP;
2068
2069         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2070         if (!msg)
2071                 return -ENOMEM;
2072
2073         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2074                              NL80211_CMD_NEW_KEY);
2075         if (IS_ERR(hdr))
2076                 return PTR_ERR(hdr);
2077
2078         cookie.msg = msg;
2079         cookie.idx = key_idx;
2080
2081         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2082             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2083                 goto nla_put_failure;
2084         if (mac_addr &&
2085             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2086                 goto nla_put_failure;
2087
2088         if (pairwise && mac_addr &&
2089             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2090                 return -ENOENT;
2091
2092         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2093                                  mac_addr, &cookie, get_key_callback);
2094
2095         if (err)
2096                 goto free_msg;
2097
2098         if (cookie.error)
2099                 goto nla_put_failure;
2100
2101         genlmsg_end(msg, hdr);
2102         return genlmsg_reply(msg, info);
2103
2104  nla_put_failure:
2105         err = -ENOBUFS;
2106  free_msg:
2107         nlmsg_free(msg);
2108         return err;
2109 }
2110
2111 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2112 {
2113         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2114         struct key_parse key;
2115         int err;
2116         struct net_device *dev = info->user_ptr[1];
2117
2118         err = nl80211_parse_key(info, &key);
2119         if (err)
2120                 return err;
2121
2122         if (key.idx < 0)
2123                 return -EINVAL;
2124
2125         /* only support setting default key */
2126         if (!key.def && !key.defmgmt)
2127                 return -EINVAL;
2128
2129         wdev_lock(dev->ieee80211_ptr);
2130
2131         if (key.def) {
2132                 if (!rdev->ops->set_default_key) {
2133                         err = -EOPNOTSUPP;
2134                         goto out;
2135                 }
2136
2137                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2138                 if (err)
2139                         goto out;
2140
2141                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2142                                                  key.def_uni, key.def_multi);
2143
2144                 if (err)
2145                         goto out;
2146
2147 #ifdef CONFIG_CFG80211_WEXT
2148                 dev->ieee80211_ptr->wext.default_key = key.idx;
2149 #endif
2150         } else {
2151                 if (key.def_uni || !key.def_multi) {
2152                         err = -EINVAL;
2153                         goto out;
2154                 }
2155
2156                 if (!rdev->ops->set_default_mgmt_key) {
2157                         err = -EOPNOTSUPP;
2158                         goto out;
2159                 }
2160
2161                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2162                 if (err)
2163                         goto out;
2164
2165                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2166                                                       dev, key.idx);
2167                 if (err)
2168                         goto out;
2169
2170 #ifdef CONFIG_CFG80211_WEXT
2171                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2172 #endif
2173         }
2174
2175  out:
2176         wdev_unlock(dev->ieee80211_ptr);
2177
2178         return err;
2179 }
2180
2181 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2182 {
2183         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2184         int err;
2185         struct net_device *dev = info->user_ptr[1];
2186         struct key_parse key;
2187         const u8 *mac_addr = NULL;
2188
2189         err = nl80211_parse_key(info, &key);
2190         if (err)
2191                 return err;
2192
2193         if (!key.p.key)
2194                 return -EINVAL;
2195
2196         if (info->attrs[NL80211_ATTR_MAC])
2197                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2198
2199         if (key.type == -1) {
2200                 if (mac_addr)
2201                         key.type = NL80211_KEYTYPE_PAIRWISE;
2202                 else
2203                         key.type = NL80211_KEYTYPE_GROUP;
2204         }
2205
2206         /* for now */
2207         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2208             key.type != NL80211_KEYTYPE_GROUP)
2209                 return -EINVAL;
2210
2211         if (!rdev->ops->add_key)
2212                 return -EOPNOTSUPP;
2213
2214         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2215                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2216                                            mac_addr))
2217                 return -EINVAL;
2218
2219         wdev_lock(dev->ieee80211_ptr);
2220         err = nl80211_key_allowed(dev->ieee80211_ptr);
2221         if (!err)
2222                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2223                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2224                                          mac_addr, &key.p);
2225         wdev_unlock(dev->ieee80211_ptr);
2226
2227         return err;
2228 }
2229
2230 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2231 {
2232         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2233         int err;
2234         struct net_device *dev = info->user_ptr[1];
2235         u8 *mac_addr = NULL;
2236         struct key_parse key;
2237
2238         err = nl80211_parse_key(info, &key);
2239         if (err)
2240                 return err;
2241
2242         if (info->attrs[NL80211_ATTR_MAC])
2243                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2244
2245         if (key.type == -1) {
2246                 if (mac_addr)
2247                         key.type = NL80211_KEYTYPE_PAIRWISE;
2248                 else
2249                         key.type = NL80211_KEYTYPE_GROUP;
2250         }
2251
2252         /* for now */
2253         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2254             key.type != NL80211_KEYTYPE_GROUP)
2255                 return -EINVAL;
2256
2257         if (!rdev->ops->del_key)
2258                 return -EOPNOTSUPP;
2259
2260         wdev_lock(dev->ieee80211_ptr);
2261         err = nl80211_key_allowed(dev->ieee80211_ptr);
2262
2263         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2264             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2265                 err = -ENOENT;
2266
2267         if (!err)
2268                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2269                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2270                                          mac_addr);
2271
2272 #ifdef CONFIG_CFG80211_WEXT
2273         if (!err) {
2274                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2275                         dev->ieee80211_ptr->wext.default_key = -1;
2276                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2277                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2278         }
2279 #endif
2280         wdev_unlock(dev->ieee80211_ptr);
2281
2282         return err;
2283 }
2284
2285 static int nl80211_parse_beacon(struct genl_info *info,
2286                                 struct cfg80211_beacon_data *bcn)
2287 {
2288         bool haveinfo = false;
2289
2290         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2291             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2292             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2293             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2294                 return -EINVAL;
2295
2296         memset(bcn, 0, sizeof(*bcn));
2297
2298         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2299                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2300                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2301                 if (!bcn->head_len)
2302                         return -EINVAL;
2303                 haveinfo = true;
2304         }
2305
2306         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2307                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2308                 bcn->tail_len =
2309                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2310                 haveinfo = true;
2311         }
2312
2313         if (!haveinfo)
2314                 return -EINVAL;
2315
2316         if (info->attrs[NL80211_ATTR_IE]) {
2317                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2318                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2319         }
2320
2321         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2322                 bcn->proberesp_ies =
2323                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2324                 bcn->proberesp_ies_len =
2325                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2326         }
2327
2328         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2329                 bcn->assocresp_ies =
2330                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2331                 bcn->assocresp_ies_len =
2332                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2333         }
2334
2335         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2336                 bcn->probe_resp =
2337                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2338                 bcn->probe_resp_len =
2339                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2340         }
2341
2342         return 0;
2343 }
2344
2345 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2346                                    struct cfg80211_ap_settings *params)
2347 {
2348         struct wireless_dev *wdev;
2349         bool ret = false;
2350
2351         mutex_lock(&rdev->devlist_mtx);
2352
2353         list_for_each_entry(wdev, &rdev->netdev_list, list) {
2354                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2355                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2356                         continue;
2357
2358                 if (!wdev->preset_chan)
2359                         continue;
2360
2361                 params->channel = wdev->preset_chan;
2362                 params->channel_type = wdev->preset_chantype;
2363                 ret = true;
2364                 break;
2365         }
2366
2367         mutex_unlock(&rdev->devlist_mtx);
2368
2369         return ret;
2370 }
2371
2372 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2373 {
2374         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2375         struct net_device *dev = info->user_ptr[1];
2376         struct wireless_dev *wdev = dev->ieee80211_ptr;
2377         struct cfg80211_ap_settings params;
2378         int err;
2379
2380         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2381             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2382                 return -EOPNOTSUPP;
2383
2384         if (!rdev->ops->start_ap)
2385                 return -EOPNOTSUPP;
2386
2387         if (wdev->beacon_interval)
2388                 return -EALREADY;
2389
2390         memset(&params, 0, sizeof(params));
2391
2392         /* these are required for START_AP */
2393         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2394             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2395             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2396                 return -EINVAL;
2397
2398         err = nl80211_parse_beacon(info, &params.beacon);
2399         if (err)
2400                 return err;
2401
2402         params.beacon_interval =
2403                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2404         params.dtim_period =
2405                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2406
2407         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2408         if (err)
2409                 return err;
2410
2411         /*
2412          * In theory, some of these attributes should be required here
2413          * but since they were not used when the command was originally
2414          * added, keep them optional for old user space programs to let
2415          * them continue to work with drivers that do not need the
2416          * additional information -- drivers must check!
2417          */
2418         if (info->attrs[NL80211_ATTR_SSID]) {
2419                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2420                 params.ssid_len =
2421                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2422                 if (params.ssid_len == 0 ||
2423                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2424                         return -EINVAL;
2425         }
2426
2427         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2428                 params.hidden_ssid = nla_get_u32(
2429                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2430                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2431                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2432                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2433                         return -EINVAL;
2434         }
2435
2436         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2437
2438         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2439                 params.auth_type = nla_get_u32(
2440                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2441                 if (!nl80211_valid_auth_type(params.auth_type))
2442                         return -EINVAL;
2443         } else
2444                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2445
2446         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2447                                       NL80211_MAX_NR_CIPHER_SUITES);
2448         if (err)
2449                 return err;
2450
2451         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2452                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2453                         return -EOPNOTSUPP;
2454                 params.inactivity_timeout = nla_get_u16(
2455                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2456         }
2457
2458         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2459                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2460
2461                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2462                     !nl80211_valid_channel_type(info, &channel_type))
2463                         return -EINVAL;
2464
2465                 params.channel = rdev_freq_to_chan(rdev,
2466                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2467                         channel_type);
2468                 if (!params.channel)
2469                         return -EINVAL;
2470                 params.channel_type = channel_type;
2471         } else if (wdev->preset_chan) {
2472                 params.channel = wdev->preset_chan;
2473                 params.channel_type = wdev->preset_chantype;
2474         } else if (!nl80211_get_ap_channel(rdev, &params))
2475                 return -EINVAL;
2476
2477         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2478                                           params.channel_type))
2479                 return -EINVAL;
2480
2481         mutex_lock(&rdev->devlist_mtx);
2482         err = cfg80211_can_use_chan(rdev, wdev, params.channel,
2483                                     CHAN_MODE_SHARED);
2484         mutex_unlock(&rdev->devlist_mtx);
2485
2486         if (err)
2487                 return err;
2488
2489         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2490         if (!err) {
2491                 wdev->preset_chan = params.channel;
2492                 wdev->preset_chantype = params.channel_type;
2493                 wdev->beacon_interval = params.beacon_interval;
2494                 wdev->channel = params.channel;
2495         }
2496         return err;
2497 }
2498
2499 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2500 {
2501         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2502         struct net_device *dev = info->user_ptr[1];
2503         struct wireless_dev *wdev = dev->ieee80211_ptr;
2504         struct cfg80211_beacon_data params;
2505         int err;
2506
2507         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2508             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2509                 return -EOPNOTSUPP;
2510
2511         if (!rdev->ops->change_beacon)
2512                 return -EOPNOTSUPP;
2513
2514         if (!wdev->beacon_interval)
2515                 return -EINVAL;
2516
2517         err = nl80211_parse_beacon(info, &params);
2518         if (err)
2519                 return err;
2520
2521         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2522 }
2523
2524 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2525 {
2526         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2527         struct net_device *dev = info->user_ptr[1];
2528
2529         return cfg80211_stop_ap(rdev, dev);
2530 }
2531
2532 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2533         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2534         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2535         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2536         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2537         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2538         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2539 };
2540
2541 static int parse_station_flags(struct genl_info *info,
2542                                enum nl80211_iftype iftype,
2543                                struct station_parameters *params)
2544 {
2545         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2546         struct nlattr *nla;
2547         int flag;
2548
2549         /*
2550          * Try parsing the new attribute first so userspace
2551          * can specify both for older kernels.
2552          */
2553         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2554         if (nla) {
2555                 struct nl80211_sta_flag_update *sta_flags;
2556
2557                 sta_flags = nla_data(nla);
2558                 params->sta_flags_mask = sta_flags->mask;
2559                 params->sta_flags_set = sta_flags->set;
2560                 if ((params->sta_flags_mask |
2561                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2562                         return -EINVAL;
2563                 return 0;
2564         }
2565
2566         /* if present, parse the old attribute */
2567
2568         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2569         if (!nla)
2570                 return 0;
2571
2572         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2573                              nla, sta_flags_policy))
2574                 return -EINVAL;
2575
2576         /*
2577          * Only allow certain flags for interface types so that
2578          * other attributes are silently ignored. Remember that
2579          * this is backward compatibility code with old userspace
2580          * and shouldn't be hit in other cases anyway.
2581          */
2582         switch (iftype) {
2583         case NL80211_IFTYPE_AP:
2584         case NL80211_IFTYPE_AP_VLAN:
2585         case NL80211_IFTYPE_P2P_GO:
2586                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2587                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2588                                          BIT(NL80211_STA_FLAG_WME) |
2589                                          BIT(NL80211_STA_FLAG_MFP);
2590                 break;
2591         case NL80211_IFTYPE_P2P_CLIENT:
2592         case NL80211_IFTYPE_STATION:
2593                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2594                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2595                 break;
2596         case NL80211_IFTYPE_MESH_POINT:
2597                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2598                                          BIT(NL80211_STA_FLAG_MFP) |
2599                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2600         default:
2601                 return -EINVAL;
2602         }
2603
2604         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2605                 if (flags[flag]) {
2606                         params->sta_flags_set |= (1<<flag);
2607
2608                         /* no longer support new API additions in old API */
2609                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2610                                 return -EINVAL;
2611                 }
2612         }
2613
2614         return 0;
2615 }
2616
2617 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2618                                  int attr)
2619 {
2620         struct nlattr *rate;
2621         u32 bitrate;
2622         u16 bitrate_compat;
2623
2624         rate = nla_nest_start(msg, attr);
2625         if (!rate)
2626                 goto nla_put_failure;
2627
2628         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2629         bitrate = cfg80211_calculate_bitrate(info);
2630         /* report 16-bit bitrate only if we can */
2631         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2632         if ((bitrate > 0 &&
2633              nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate)) ||
2634             (bitrate_compat > 0 &&
2635              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat)) ||
2636             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2637              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2638             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2639              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2640             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2641              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2642                 goto nla_put_failure;
2643
2644         nla_nest_end(msg, rate);
2645         return true;
2646
2647 nla_put_failure:
2648         return false;
2649 }
2650
2651 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2652                                 int flags,
2653                                 struct cfg80211_registered_device *rdev,
2654                                 struct net_device *dev,
2655                                 const u8 *mac_addr, struct station_info *sinfo)
2656 {
2657         void *hdr;
2658         struct nlattr *sinfoattr, *bss_param;
2659
2660         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2661         if (!hdr)
2662                 return -1;
2663
2664         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2665             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2666             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2667                 goto nla_put_failure;
2668
2669         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2670         if (!sinfoattr)
2671                 goto nla_put_failure;
2672         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2673             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2674                         sinfo->connected_time))
2675                 goto nla_put_failure;
2676         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2677             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2678                         sinfo->inactive_time))
2679                 goto nla_put_failure;
2680         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2681             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2682                         sinfo->rx_bytes))
2683                 goto nla_put_failure;
2684         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2685             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2686                         sinfo->tx_bytes))
2687                 goto nla_put_failure;
2688         if ((sinfo->filled & STATION_INFO_LLID) &&
2689             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2690                 goto nla_put_failure;
2691         if ((sinfo->filled & STATION_INFO_PLID) &&
2692             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2693                 goto nla_put_failure;
2694         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2695             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2696                        sinfo->plink_state))
2697                 goto nla_put_failure;
2698         switch (rdev->wiphy.signal_type) {
2699         case CFG80211_SIGNAL_TYPE_MBM:
2700                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2701                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2702                                sinfo->signal))
2703                         goto nla_put_failure;
2704                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2705                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2706                                sinfo->signal_avg))
2707                         goto nla_put_failure;
2708                 break;
2709         default:
2710                 break;
2711         }
2712         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2713                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2714                                           NL80211_STA_INFO_TX_BITRATE))
2715                         goto nla_put_failure;
2716         }
2717         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2718                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2719                                           NL80211_STA_INFO_RX_BITRATE))
2720                         goto nla_put_failure;
2721         }
2722         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2723             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2724                         sinfo->rx_packets))
2725                 goto nla_put_failure;
2726         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2727             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2728                         sinfo->tx_packets))
2729                 goto nla_put_failure;
2730         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2731             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2732                         sinfo->tx_retries))
2733                 goto nla_put_failure;
2734         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2735             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2736                         sinfo->tx_failed))
2737                 goto nla_put_failure;
2738         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2739             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2740                         sinfo->beacon_loss_count))
2741                 goto nla_put_failure;
2742         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2743                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2744                 if (!bss_param)
2745                         goto nla_put_failure;
2746
2747                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2748                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2749                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2750                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2751                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2752                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2753                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2754                                sinfo->bss_param.dtim_period) ||
2755                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2756                                 sinfo->bss_param.beacon_interval))
2757                         goto nla_put_failure;
2758
2759                 nla_nest_end(msg, bss_param);
2760         }
2761         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2762             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2763                     sizeof(struct nl80211_sta_flag_update),
2764                     &sinfo->sta_flags))
2765                 goto nla_put_failure;
2766         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2767                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2768                             sinfo->t_offset))
2769                 goto nla_put_failure;
2770         nla_nest_end(msg, sinfoattr);
2771
2772         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2773             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2774                     sinfo->assoc_req_ies))
2775                 goto nla_put_failure;
2776
2777         return genlmsg_end(msg, hdr);
2778
2779  nla_put_failure:
2780         genlmsg_cancel(msg, hdr);
2781         return -EMSGSIZE;
2782 }
2783
2784 static int nl80211_dump_station(struct sk_buff *skb,
2785                                 struct netlink_callback *cb)
2786 {
2787         struct station_info sinfo;
2788         struct cfg80211_registered_device *dev;
2789         struct net_device *netdev;
2790         u8 mac_addr[ETH_ALEN];
2791         int sta_idx = cb->args[1];
2792         int err;
2793
2794         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2795         if (err)
2796                 return err;
2797
2798         if (!dev->ops->dump_station) {
2799                 err = -EOPNOTSUPP;
2800                 goto out_err;
2801         }
2802
2803         while (1) {
2804                 memset(&sinfo, 0, sizeof(sinfo));
2805                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2806                                              mac_addr, &sinfo);
2807                 if (err == -ENOENT)
2808                         break;
2809                 if (err)
2810                         goto out_err;
2811
2812                 if (nl80211_send_station(skb,
2813                                 NETLINK_CB(cb->skb).pid,
2814                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2815                                 dev, netdev, mac_addr,
2816                                 &sinfo) < 0)
2817                         goto out;
2818
2819                 sta_idx++;
2820         }
2821
2822
2823  out:
2824         cb->args[1] = sta_idx;
2825         err = skb->len;
2826  out_err:
2827         nl80211_finish_netdev_dump(dev);
2828
2829         return err;
2830 }
2831
2832 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2833 {
2834         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2835         struct net_device *dev = info->user_ptr[1];
2836         struct station_info sinfo;
2837         struct sk_buff *msg;
2838         u8 *mac_addr = NULL;
2839         int err;
2840
2841         memset(&sinfo, 0, sizeof(sinfo));
2842
2843         if (!info->attrs[NL80211_ATTR_MAC])
2844                 return -EINVAL;
2845
2846         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2847
2848         if (!rdev->ops->get_station)
2849                 return -EOPNOTSUPP;
2850
2851         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2852         if (err)
2853                 return err;
2854
2855         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2856         if (!msg)
2857                 return -ENOMEM;
2858
2859         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2860                                  rdev, dev, mac_addr, &sinfo) < 0) {
2861                 nlmsg_free(msg);
2862                 return -ENOBUFS;
2863         }
2864
2865         return genlmsg_reply(msg, info);
2866 }
2867
2868 /*
2869  * Get vlan interface making sure it is running and on the right wiphy.
2870  */
2871 static struct net_device *get_vlan(struct genl_info *info,
2872                                    struct cfg80211_registered_device *rdev)
2873 {
2874         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2875         struct net_device *v;
2876         int ret;
2877
2878         if (!vlanattr)
2879                 return NULL;
2880
2881         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2882         if (!v)
2883                 return ERR_PTR(-ENODEV);
2884
2885         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2886                 ret = -EINVAL;
2887                 goto error;
2888         }
2889
2890         if (!netif_running(v)) {
2891                 ret = -ENETDOWN;
2892                 goto error;
2893         }
2894
2895         return v;
2896  error:
2897         dev_put(v);
2898         return ERR_PTR(ret);
2899 }
2900
2901 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2902 {
2903         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2904         int err;
2905         struct net_device *dev = info->user_ptr[1];
2906         struct station_parameters params;
2907         u8 *mac_addr = NULL;
2908
2909         memset(&params, 0, sizeof(params));
2910
2911         params.listen_interval = -1;
2912         params.plink_state = -1;
2913
2914         if (info->attrs[NL80211_ATTR_STA_AID])
2915                 return -EINVAL;
2916
2917         if (!info->attrs[NL80211_ATTR_MAC])
2918                 return -EINVAL;
2919
2920         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2921
2922         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2923                 params.supported_rates =
2924                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2925                 params.supported_rates_len =
2926                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2927         }
2928
2929         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2930                 params.listen_interval =
2931                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2932
2933         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2934                 params.ht_capa =
2935                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2936
2937         if (!rdev->ops->change_station)
2938                 return -EOPNOTSUPP;
2939
2940         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
2941                 return -EINVAL;
2942
2943         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
2944                 params.plink_action =
2945                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
2946
2947         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
2948                 params.plink_state =
2949                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
2950
2951         switch (dev->ieee80211_ptr->iftype) {
2952         case NL80211_IFTYPE_AP:
2953         case NL80211_IFTYPE_AP_VLAN:
2954         case NL80211_IFTYPE_P2P_GO:
2955                 /* disallow mesh-specific things */
2956                 if (params.plink_action)
2957                         return -EINVAL;
2958
2959                 /* TDLS can't be set, ... */
2960                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
2961                         return -EINVAL;
2962                 /*
2963                  * ... but don't bother the driver with it. This works around
2964                  * a hostapd/wpa_supplicant issue -- it always includes the
2965                  * TLDS_PEER flag in the mask even for AP mode.
2966                  */
2967                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2968
2969                 /* accept only the listed bits */
2970                 if (params.sta_flags_mask &
2971                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
2972                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2973                                   BIT(NL80211_STA_FLAG_WME) |
2974                                   BIT(NL80211_STA_FLAG_MFP)))
2975                         return -EINVAL;
2976
2977                 /* must be last in here for error handling */
2978                 params.vlan = get_vlan(info, rdev);
2979                 if (IS_ERR(params.vlan))
2980                         return PTR_ERR(params.vlan);
2981                 break;
2982         case NL80211_IFTYPE_P2P_CLIENT:
2983         case NL80211_IFTYPE_STATION:
2984                 /*
2985                  * Don't allow userspace to change the TDLS_PEER flag,
2986                  * but silently ignore attempts to change it since we
2987                  * don't have state here to verify that it doesn't try
2988                  * to change the flag.
2989                  */
2990                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
2991                 /* fall through */
2992         case NL80211_IFTYPE_ADHOC:
2993                 /* disallow things sta doesn't support */
2994                 if (params.plink_action)
2995                         return -EINVAL;
2996                 if (params.ht_capa)
2997                         return -EINVAL;
2998                 if (params.listen_interval >= 0)
2999                         return -EINVAL;
3000                 /* reject any changes other than AUTHORIZED */
3001                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3002                         return -EINVAL;
3003                 break;
3004         case NL80211_IFTYPE_MESH_POINT:
3005                 /* disallow things mesh doesn't support */
3006                 if (params.vlan)
3007                         return -EINVAL;
3008                 if (params.ht_capa)
3009                         return -EINVAL;
3010                 if (params.listen_interval >= 0)
3011                         return -EINVAL;
3012                 /*
3013                  * No special handling for TDLS here -- the userspace
3014                  * mesh code doesn't have this bug.
3015                  */
3016                 if (params.sta_flags_mask &
3017                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3018                                   BIT(NL80211_STA_FLAG_MFP) |
3019                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3020                         return -EINVAL;
3021                 break;
3022         default:
3023                 return -EOPNOTSUPP;
3024         }
3025
3026         /* be aware of params.vlan when changing code here */
3027
3028         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3029
3030         if (params.vlan)
3031                 dev_put(params.vlan);
3032
3033         return err;
3034 }
3035
3036 static struct nla_policy
3037 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3038         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3039         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3040 };
3041
3042 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3043 {
3044         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3045         int err;
3046         struct net_device *dev = info->user_ptr[1];
3047         struct station_parameters params;
3048         u8 *mac_addr = NULL;
3049
3050         memset(&params, 0, sizeof(params));
3051
3052         if (!info->attrs[NL80211_ATTR_MAC])
3053                 return -EINVAL;
3054
3055         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3056                 return -EINVAL;
3057
3058         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3059                 return -EINVAL;
3060
3061         if (!info->attrs[NL80211_ATTR_STA_AID])
3062                 return -EINVAL;
3063
3064         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3065         params.supported_rates =
3066                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3067         params.supported_rates_len =
3068                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3069         params.listen_interval =
3070                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3071
3072         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3073         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3074                 return -EINVAL;
3075
3076         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3077                 params.ht_capa =
3078                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3079
3080         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3081                 params.plink_action =
3082                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3083
3084         if (!rdev->ops->add_station)
3085                 return -EOPNOTSUPP;
3086
3087         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3088                 return -EINVAL;
3089
3090         switch (dev->ieee80211_ptr->iftype) {
3091         case NL80211_IFTYPE_AP:
3092         case NL80211_IFTYPE_AP_VLAN:
3093         case NL80211_IFTYPE_P2P_GO:
3094                 /* parse WME attributes if sta is WME capable */
3095                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3096                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3097                     info->attrs[NL80211_ATTR_STA_WME]) {
3098                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3099                         struct nlattr *nla;
3100
3101                         nla = info->attrs[NL80211_ATTR_STA_WME];
3102                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3103                                                nl80211_sta_wme_policy);
3104                         if (err)
3105                                 return err;
3106
3107                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3108                                 params.uapsd_queues =
3109                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3110                         if (params.uapsd_queues &
3111                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3112                                 return -EINVAL;
3113
3114                         if (tb[NL80211_STA_WME_MAX_SP])
3115                                 params.max_sp =
3116                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3117
3118                         if (params.max_sp &
3119                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3120                                 return -EINVAL;
3121
3122                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3123                 }
3124                 /* TDLS peers cannot be added */
3125                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3126                         return -EINVAL;
3127                 /* but don't bother the driver with it */
3128                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3129
3130                 /* must be last in here for error handling */
3131                 params.vlan = get_vlan(info, rdev);
3132                 if (IS_ERR(params.vlan))
3133                         return PTR_ERR(params.vlan);
3134                 break;
3135         case NL80211_IFTYPE_MESH_POINT:
3136                 /* TDLS peers cannot be added */
3137                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3138                         return -EINVAL;
3139                 break;
3140         case NL80211_IFTYPE_STATION:
3141                 /* Only TDLS peers can be added */
3142                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3143                         return -EINVAL;
3144                 /* Can only add if TDLS ... */
3145                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3146                         return -EOPNOTSUPP;
3147                 /* ... with external setup is supported */
3148                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3149                         return -EOPNOTSUPP;
3150                 break;
3151         default:
3152                 return -EOPNOTSUPP;
3153         }
3154
3155         /* be aware of params.vlan when changing code here */
3156
3157         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3158
3159         if (params.vlan)
3160                 dev_put(params.vlan);
3161         return err;
3162 }
3163
3164 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3165 {
3166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3167         struct net_device *dev = info->user_ptr[1];
3168         u8 *mac_addr = NULL;
3169
3170         if (info->attrs[NL80211_ATTR_MAC])
3171                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3172
3173         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3174             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3175             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3176             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3177                 return -EINVAL;
3178
3179         if (!rdev->ops->del_station)
3180                 return -EOPNOTSUPP;
3181
3182         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3183 }
3184
3185 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3186                                 int flags, struct net_device *dev,
3187                                 u8 *dst, u8 *next_hop,
3188                                 struct mpath_info *pinfo)
3189 {
3190         void *hdr;
3191         struct nlattr *pinfoattr;
3192
3193         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3194         if (!hdr)
3195                 return -1;
3196
3197         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3198             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3199             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3200             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3201                 goto nla_put_failure;
3202
3203         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3204         if (!pinfoattr)
3205                 goto nla_put_failure;
3206         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3207             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3208                         pinfo->frame_qlen))
3209                 goto nla_put_failure;
3210         if (((pinfo->filled & MPATH_INFO_SN) &&
3211              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3212             ((pinfo->filled & MPATH_INFO_METRIC) &&
3213              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3214                          pinfo->metric)) ||
3215             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3216              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3217                          pinfo->exptime)) ||
3218             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3219              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3220                         pinfo->flags)) ||
3221             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3222              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3223                          pinfo->discovery_timeout)) ||
3224             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3225              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3226                         pinfo->discovery_retries)))
3227                 goto nla_put_failure;
3228
3229         nla_nest_end(msg, pinfoattr);
3230
3231         return genlmsg_end(msg, hdr);
3232
3233  nla_put_failure:
3234         genlmsg_cancel(msg, hdr);
3235         return -EMSGSIZE;
3236 }
3237
3238 static int nl80211_dump_mpath(struct sk_buff *skb,
3239                               struct netlink_callback *cb)
3240 {
3241         struct mpath_info pinfo;
3242         struct cfg80211_registered_device *dev;
3243         struct net_device *netdev;
3244         u8 dst[ETH_ALEN];
3245         u8 next_hop[ETH_ALEN];
3246         int path_idx = cb->args[1];
3247         int err;
3248
3249         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3250         if (err)
3251                 return err;
3252
3253         if (!dev->ops->dump_mpath) {
3254                 err = -EOPNOTSUPP;
3255                 goto out_err;
3256         }
3257
3258         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3259                 err = -EOPNOTSUPP;
3260                 goto out_err;
3261         }
3262
3263         while (1) {
3264                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3265                                            dst, next_hop, &pinfo);
3266                 if (err == -ENOENT)
3267                         break;
3268                 if (err)
3269                         goto out_err;
3270
3271                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3272                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3273                                        netdev, dst, next_hop,
3274                                        &pinfo) < 0)
3275                         goto out;
3276
3277                 path_idx++;
3278         }
3279
3280
3281  out:
3282         cb->args[1] = path_idx;
3283         err = skb->len;
3284  out_err:
3285         nl80211_finish_netdev_dump(dev);
3286         return err;
3287 }
3288
3289 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3290 {
3291         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3292         int err;
3293         struct net_device *dev = info->user_ptr[1];
3294         struct mpath_info pinfo;
3295         struct sk_buff *msg;
3296         u8 *dst = NULL;
3297         u8 next_hop[ETH_ALEN];
3298
3299         memset(&pinfo, 0, sizeof(pinfo));
3300
3301         if (!info->attrs[NL80211_ATTR_MAC])
3302                 return -EINVAL;
3303
3304         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3305
3306         if (!rdev->ops->get_mpath)
3307                 return -EOPNOTSUPP;
3308
3309         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3310                 return -EOPNOTSUPP;
3311
3312         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3313         if (err)
3314                 return err;
3315
3316         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3317         if (!msg)
3318                 return -ENOMEM;
3319
3320         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3321                                  dev, dst, next_hop, &pinfo) < 0) {
3322                 nlmsg_free(msg);
3323                 return -ENOBUFS;
3324         }
3325
3326         return genlmsg_reply(msg, info);
3327 }
3328
3329 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3330 {
3331         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3332         struct net_device *dev = info->user_ptr[1];
3333         u8 *dst = NULL;
3334         u8 *next_hop = NULL;
3335
3336         if (!info->attrs[NL80211_ATTR_MAC])
3337                 return -EINVAL;
3338
3339         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3340                 return -EINVAL;
3341
3342         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3343         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3344
3345         if (!rdev->ops->change_mpath)
3346                 return -EOPNOTSUPP;
3347
3348         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3349                 return -EOPNOTSUPP;
3350
3351         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3352 }
3353
3354 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3355 {
3356         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3357         struct net_device *dev = info->user_ptr[1];
3358         u8 *dst = NULL;
3359         u8 *next_hop = NULL;
3360
3361         if (!info->attrs[NL80211_ATTR_MAC])
3362                 return -EINVAL;
3363
3364         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3365                 return -EINVAL;
3366
3367         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3368         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3369
3370         if (!rdev->ops->add_mpath)
3371                 return -EOPNOTSUPP;
3372
3373         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3374                 return -EOPNOTSUPP;
3375
3376         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3377 }
3378
3379 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3380 {
3381         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3382         struct net_device *dev = info->user_ptr[1];
3383         u8 *dst = NULL;
3384
3385         if (info->attrs[NL80211_ATTR_MAC])
3386                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3387
3388         if (!rdev->ops->del_mpath)
3389                 return -EOPNOTSUPP;
3390
3391         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3392 }
3393
3394 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3395 {
3396         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3397         struct net_device *dev = info->user_ptr[1];
3398         struct bss_parameters params;
3399
3400         memset(&params, 0, sizeof(params));
3401         /* default to not changing parameters */
3402         params.use_cts_prot = -1;
3403         params.use_short_preamble = -1;
3404         params.use_short_slot_time = -1;
3405         params.ap_isolate = -1;
3406         params.ht_opmode = -1;
3407
3408         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3409                 params.use_cts_prot =
3410                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3411         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3412                 params.use_short_preamble =
3413                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3414         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3415                 params.use_short_slot_time =
3416                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3417         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3418                 params.basic_rates =
3419                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3420                 params.basic_rates_len =
3421                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3422         }
3423         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3424                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3425         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3426                 params.ht_opmode =
3427                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3428
3429         if (!rdev->ops->change_bss)
3430                 return -EOPNOTSUPP;
3431
3432         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3433             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3434                 return -EOPNOTSUPP;
3435
3436         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3437 }
3438
3439 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3440         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3441         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3442         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3443         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3444         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3445         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3446 };
3447
3448 static int parse_reg_rule(struct nlattr *tb[],
3449         struct ieee80211_reg_rule *reg_rule)
3450 {
3451         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3452         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3453
3454         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3455                 return -EINVAL;
3456         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3457                 return -EINVAL;
3458         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3459                 return -EINVAL;
3460         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3461                 return -EINVAL;
3462         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3463                 return -EINVAL;
3464
3465         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3466
3467         freq_range->start_freq_khz =
3468                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3469         freq_range->end_freq_khz =
3470                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3471         freq_range->max_bandwidth_khz =
3472                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3473
3474         power_rule->max_eirp =
3475                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3476
3477         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3478                 power_rule->max_antenna_gain =
3479                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3480
3481         return 0;
3482 }
3483
3484 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3485 {
3486         int r;
3487         char *data = NULL;
3488
3489         /*
3490          * You should only get this when cfg80211 hasn't yet initialized
3491          * completely when built-in to the kernel right between the time
3492          * window between nl80211_init() and regulatory_init(), if that is
3493          * even possible.
3494          */
3495         mutex_lock(&cfg80211_mutex);
3496         if (unlikely(!cfg80211_regdomain)) {
3497                 mutex_unlock(&cfg80211_mutex);
3498                 return -EINPROGRESS;
3499         }
3500         mutex_unlock(&cfg80211_mutex);
3501
3502         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3503                 return -EINVAL;
3504
3505         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3506
3507         r = regulatory_hint_user(data);
3508
3509         return r;
3510 }
3511
3512 static int nl80211_get_mesh_config(struct sk_buff *skb,
3513                                    struct genl_info *info)
3514 {
3515         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3516         struct net_device *dev = info->user_ptr[1];
3517         struct wireless_dev *wdev = dev->ieee80211_ptr;
3518         struct mesh_config cur_params;
3519         int err = 0;
3520         void *hdr;
3521         struct nlattr *pinfoattr;
3522         struct sk_buff *msg;
3523
3524         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3525                 return -EOPNOTSUPP;
3526
3527         if (!rdev->ops->get_mesh_config)
3528                 return -EOPNOTSUPP;
3529
3530         wdev_lock(wdev);
3531         /* If not connected, get default parameters */
3532         if (!wdev->mesh_id_len)
3533                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3534         else
3535                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3536                                                  &cur_params);
3537         wdev_unlock(wdev);
3538
3539         if (err)
3540                 return err;
3541
3542         /* Draw up a netlink message to send back */
3543         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3544         if (!msg)
3545                 return -ENOMEM;
3546         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3547                              NL80211_CMD_GET_MESH_CONFIG);
3548         if (!hdr)
3549                 goto out;
3550         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3551         if (!pinfoattr)
3552                 goto nla_put_failure;
3553         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3554             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3555                         cur_params.dot11MeshRetryTimeout) ||
3556             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3557                         cur_params.dot11MeshConfirmTimeout) ||
3558             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3559                         cur_params.dot11MeshHoldingTimeout) ||
3560             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3561                         cur_params.dot11MeshMaxPeerLinks) ||
3562             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3563                        cur_params.dot11MeshMaxRetries) ||
3564             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3565                        cur_params.dot11MeshTTL) ||
3566             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3567                        cur_params.element_ttl) ||
3568             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3569                        cur_params.auto_open_plinks) ||
3570             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3571                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3572             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3573                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3574             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3575                         cur_params.path_refresh_time) ||
3576             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3577                         cur_params.min_discovery_timeout) ||
3578             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3579                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3580             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3581                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3582             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3583                         cur_params.dot11MeshHWMPperrMinInterval) ||
3584             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3585                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3586             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3587                        cur_params.dot11MeshHWMPRootMode) ||
3588             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3589                         cur_params.dot11MeshHWMPRannInterval) ||
3590             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3591                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3592             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3593                        cur_params.dot11MeshForwarding) ||
3594             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3595                         cur_params.rssi_threshold) ||
3596             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3597                         cur_params.ht_opmode) ||
3598             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3599                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3600             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3601                         cur_params.dot11MeshHWMProotInterval) ||
3602             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3603                         cur_params.dot11MeshHWMPconfirmationInterval))
3604                 goto nla_put_failure;
3605         nla_nest_end(msg, pinfoattr);
3606         genlmsg_end(msg, hdr);
3607         return genlmsg_reply(msg, info);
3608
3609  nla_put_failure:
3610         genlmsg_cancel(msg, hdr);
3611  out:
3612         nlmsg_free(msg);
3613         return -ENOBUFS;
3614 }
3615
3616 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3617         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3618         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3619         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3620         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3621         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3622         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3623         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3624         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3625         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3626         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3627         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3628         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3629         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3630         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3631         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3632         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3633         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3634         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3635         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3636         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3637         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3638         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3639         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3640         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3641         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3642 };
3643
3644 static const struct nla_policy
3645         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3646         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3647         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3648         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3649         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3650         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3651                                     .len = IEEE80211_MAX_DATA_LEN },
3652         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3653 };
3654
3655 static int nl80211_parse_mesh_config(struct genl_info *info,
3656                                      struct mesh_config *cfg,
3657                                      u32 *mask_out)
3658 {
3659         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3660         u32 mask = 0;
3661
3662 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3663 do {\
3664         if (table[attr_num]) {\
3665                 cfg->param = nla_fn(table[attr_num]); \
3666                 mask |= (1 << (attr_num - 1)); \
3667         } \
3668 } while (0);\
3669
3670
3671         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3672                 return -EINVAL;
3673         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3674                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3675                              nl80211_meshconf_params_policy))
3676                 return -EINVAL;
3677
3678         /* This makes sure that there aren't more than 32 mesh config
3679          * parameters (otherwise our bitfield scheme would not work.) */
3680         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3681
3682         /* Fill in the params struct */
3683         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3684                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3685                                   nla_get_u16);
3686         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3687                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3688                                   nla_get_u16);
3689         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3690                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3691                                   nla_get_u16);
3692         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3693                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3694                                   nla_get_u16);
3695         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3696                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3697                                   nla_get_u8);
3698         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3699                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3700         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3701                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3702                                   nla_get_u8);
3703         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3704                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3705                                   nla_get_u8);
3706         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3707                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3708                                   nla_get_u32);
3709         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3710                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3711                                   nla_get_u8);
3712         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3713                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3714                                   nla_get_u32);
3715         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3716                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3717                                   nla_get_u16);
3718         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3719                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3720                                   nla_get_u32);
3721         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3722                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3723                                   nla_get_u16);
3724         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3725                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3726                                   nla_get_u16);
3727         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3728                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3729                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3730                                   nla_get_u16);
3731         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3732                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3733         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3734                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3735                                   nla_get_u16);
3736         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3737                                   dot11MeshGateAnnouncementProtocol, mask,
3738                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3739                                   nla_get_u8);
3740         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3741                                   mask, NL80211_MESHCONF_FORWARDING,
3742                                   nla_get_u8);
3743         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3744                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3745                                   nla_get_u32);
3746         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3747                                   mask, NL80211_MESHCONF_HT_OPMODE,
3748                                   nla_get_u16);
3749         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3750                                   mask,
3751                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3752                                   nla_get_u32);
3753         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3754                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3755                                   nla_get_u16);
3756         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3757                                   dot11MeshHWMPconfirmationInterval, mask,
3758                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3759                                   nla_get_u16);
3760         if (mask_out)
3761                 *mask_out = mask;
3762
3763         return 0;
3764
3765 #undef FILL_IN_MESH_PARAM_IF_SET
3766 }
3767
3768 static int nl80211_parse_mesh_setup(struct genl_info *info,
3769                                      struct mesh_setup *setup)
3770 {
3771         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3772
3773         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3774                 return -EINVAL;
3775         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3776                              info->attrs[NL80211_ATTR_MESH_SETUP],
3777                              nl80211_mesh_setup_params_policy))
3778                 return -EINVAL;
3779
3780         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3781                 setup->sync_method =
3782                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3783                  IEEE80211_SYNC_METHOD_VENDOR :
3784                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3785
3786         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3787                 setup->path_sel_proto =
3788                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3789                  IEEE80211_PATH_PROTOCOL_VENDOR :
3790                  IEEE80211_PATH_PROTOCOL_HWMP;
3791
3792         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3793                 setup->path_metric =
3794                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3795                  IEEE80211_PATH_METRIC_VENDOR :
3796                  IEEE80211_PATH_METRIC_AIRTIME;
3797
3798
3799         if (tb[NL80211_MESH_SETUP_IE]) {
3800                 struct nlattr *ieattr =
3801                         tb[NL80211_MESH_SETUP_IE];
3802                 if (!is_valid_ie_attr(ieattr))
3803                         return -EINVAL;
3804                 setup->ie = nla_data(ieattr);
3805                 setup->ie_len = nla_len(ieattr);
3806         }
3807         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3808         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3809
3810         return 0;
3811 }
3812
3813 static int nl80211_update_mesh_config(struct sk_buff *skb,
3814                                       struct genl_info *info)
3815 {
3816         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3817         struct net_device *dev = info->user_ptr[1];
3818         struct wireless_dev *wdev = dev->ieee80211_ptr;
3819         struct mesh_config cfg;
3820         u32 mask;
3821         int err;
3822
3823         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3824                 return -EOPNOTSUPP;
3825
3826         if (!rdev->ops->update_mesh_config)
3827                 return -EOPNOTSUPP;
3828
3829         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3830         if (err)
3831                 return err;
3832
3833         wdev_lock(wdev);
3834         if (!wdev->mesh_id_len)
3835                 err = -ENOLINK;
3836
3837         if (!err)
3838                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3839                                                     mask, &cfg);
3840
3841         wdev_unlock(wdev);
3842
3843         return err;
3844 }
3845
3846 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3847 {
3848         struct sk_buff *msg;
3849         void *hdr = NULL;
3850         struct nlattr *nl_reg_rules;
3851         unsigned int i;
3852         int err = -EINVAL;
3853
3854         mutex_lock(&cfg80211_mutex);
3855
3856         if (!cfg80211_regdomain)
3857                 goto out;
3858
3859         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3860         if (!msg) {
3861                 err = -ENOBUFS;
3862                 goto out;
3863         }
3864
3865         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3866                              NL80211_CMD_GET_REG);
3867         if (!hdr)
3868                 goto put_failure;
3869
3870         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3871                            cfg80211_regdomain->alpha2) ||
3872             (cfg80211_regdomain->dfs_region &&
3873              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3874                         cfg80211_regdomain->dfs_region)))
3875                 goto nla_put_failure;
3876
3877         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3878         if (!nl_reg_rules)
3879                 goto nla_put_failure;
3880
3881         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3882                 struct nlattr *nl_reg_rule;
3883                 const struct ieee80211_reg_rule *reg_rule;
3884                 const struct ieee80211_freq_range *freq_range;
3885                 const struct ieee80211_power_rule *power_rule;
3886
3887                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3888                 freq_range = &reg_rule->freq_range;
3889                 power_rule = &reg_rule->power_rule;
3890
3891                 nl_reg_rule = nla_nest_start(msg, i);
3892                 if (!nl_reg_rule)
3893                         goto nla_put_failure;
3894
3895                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3896                                 reg_rule->flags) ||
3897                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3898                                 freq_range->start_freq_khz) ||
3899                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3900                                 freq_range->end_freq_khz) ||
3901                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3902                                 freq_range->max_bandwidth_khz) ||
3903                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3904                                 power_rule->max_antenna_gain) ||
3905                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3906                                 power_rule->max_eirp))
3907                         goto nla_put_failure;
3908
3909                 nla_nest_end(msg, nl_reg_rule);
3910         }
3911
3912         nla_nest_end(msg, nl_reg_rules);
3913
3914         genlmsg_end(msg, hdr);
3915         err = genlmsg_reply(msg, info);
3916         goto out;
3917
3918 nla_put_failure:
3919         genlmsg_cancel(msg, hdr);
3920 put_failure:
3921         nlmsg_free(msg);
3922         err = -EMSGSIZE;
3923 out:
3924         mutex_unlock(&cfg80211_mutex);
3925         return err;
3926 }
3927
3928 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3929 {
3930         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3931         struct nlattr *nl_reg_rule;
3932         char *alpha2 = NULL;
3933         int rem_reg_rules = 0, r = 0;
3934         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3935         u8 dfs_region = 0;
3936         struct ieee80211_regdomain *rd = NULL;
3937
3938         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3939                 return -EINVAL;
3940
3941         if (!info->attrs[NL80211_ATTR_REG_RULES])
3942                 return -EINVAL;
3943
3944         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3945
3946         if (info->attrs[NL80211_ATTR_DFS_REGION])
3947                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
3948
3949         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3950                         rem_reg_rules) {
3951                 num_rules++;
3952                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
3953                         return -EINVAL;
3954         }
3955
3956         mutex_lock(&cfg80211_mutex);
3957
3958         if (!reg_is_valid_request(alpha2)) {
3959                 r = -EINVAL;
3960                 goto bad_reg;
3961         }
3962
3963         size_of_regd = sizeof(struct ieee80211_regdomain) +
3964                 (num_rules * sizeof(struct ieee80211_reg_rule));
3965
3966         rd = kzalloc(size_of_regd, GFP_KERNEL);
3967         if (!rd) {
3968                 r = -ENOMEM;
3969                 goto bad_reg;
3970         }
3971
3972         rd->n_reg_rules = num_rules;
3973         rd->alpha2[0] = alpha2[0];
3974         rd->alpha2[1] = alpha2[1];
3975
3976         /*
3977          * Disable DFS master mode if the DFS region was
3978          * not supported or known on this kernel.
3979          */
3980         if (reg_supported_dfs_region(dfs_region))
3981                 rd->dfs_region = dfs_region;
3982
3983         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
3984                         rem_reg_rules) {
3985                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
3986                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
3987                         reg_rule_policy);
3988                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
3989                 if (r)
3990                         goto bad_reg;
3991
3992                 rule_idx++;
3993
3994                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
3995                         r = -EINVAL;
3996                         goto bad_reg;
3997                 }
3998         }
3999
4000         BUG_ON(rule_idx != num_rules);
4001
4002         r = set_regdom(rd);
4003
4004         mutex_unlock(&cfg80211_mutex);
4005
4006         return r;
4007
4008  bad_reg:
4009         mutex_unlock(&cfg80211_mutex);
4010         kfree(rd);
4011         return r;
4012 }
4013
4014 static int validate_scan_freqs(struct nlattr *freqs)
4015 {
4016         struct nlattr *attr1, *attr2;
4017         int n_channels = 0, tmp1, tmp2;
4018
4019         nla_for_each_nested(attr1, freqs, tmp1) {
4020                 n_channels++;
4021                 /*
4022                  * Some hardware has a limited channel list for
4023                  * scanning, and it is pretty much nonsensical
4024                  * to scan for a channel twice, so disallow that
4025                  * and don't require drivers to check that the
4026                  * channel list they get isn't longer than what
4027                  * they can scan, as long as they can scan all
4028                  * the channels they registered at once.
4029                  */
4030                 nla_for_each_nested(attr2, freqs, tmp2)
4031                         if (attr1 != attr2 &&
4032                             nla_get_u32(attr1) == nla_get_u32(attr2))
4033                                 return 0;
4034         }
4035
4036         return n_channels;
4037 }
4038
4039 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4040 {
4041         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4042         struct net_device *dev = info->user_ptr[1];
4043         struct cfg80211_scan_request *request;
4044         struct nlattr *attr;
4045         struct wiphy *wiphy;
4046         int err, tmp, n_ssids = 0, n_channels, i;
4047         size_t ie_len;
4048
4049         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4050                 return -EINVAL;
4051
4052         wiphy = &rdev->wiphy;
4053
4054         if (!rdev->ops->scan)
4055                 return -EOPNOTSUPP;
4056
4057         if (rdev->scan_req)
4058                 return -EBUSY;
4059
4060         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4061                 n_channels = validate_scan_freqs(
4062                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4063                 if (!n_channels)
4064                         return -EINVAL;
4065         } else {
4066                 enum ieee80211_band band;
4067                 n_channels = 0;
4068
4069                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4070                         if (wiphy->bands[band])
4071                                 n_channels += wiphy->bands[band]->n_channels;
4072         }
4073
4074         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4075                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4076                         n_ssids++;
4077
4078         if (n_ssids > wiphy->max_scan_ssids)
4079                 return -EINVAL;
4080
4081         if (info->attrs[NL80211_ATTR_IE])
4082                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4083         else
4084                 ie_len = 0;
4085
4086         if (ie_len > wiphy->max_scan_ie_len)
4087                 return -EINVAL;
4088
4089         request = kzalloc(sizeof(*request)
4090                         + sizeof(*request->ssids) * n_ssids
4091                         + sizeof(*request->channels) * n_channels
4092                         + ie_len, GFP_KERNEL);
4093         if (!request)
4094                 return -ENOMEM;
4095
4096         if (n_ssids)
4097                 request->ssids = (void *)&request->channels[n_channels];
4098         request->n_ssids = n_ssids;
4099         if (ie_len) {
4100                 if (request->ssids)
4101                         request->ie = (void *)(request->ssids + n_ssids);
4102                 else
4103                         request->ie = (void *)(request->channels + n_channels);
4104         }
4105
4106         i = 0;
4107         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4108                 /* user specified, bail out if channel not found */
4109                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4110                         struct ieee80211_channel *chan;
4111
4112                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4113
4114                         if (!chan) {
4115                                 err = -EINVAL;
4116                                 goto out_free;
4117                         }
4118
4119                         /* ignore disabled channels */
4120                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4121                                 continue;
4122
4123                         request->channels[i] = chan;
4124                         i++;
4125                 }
4126         } else {
4127                 enum ieee80211_band band;
4128
4129                 /* all channels */
4130                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4131                         int j;
4132                         if (!wiphy->bands[band])
4133                                 continue;
4134                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4135                                 struct ieee80211_channel *chan;
4136
4137                                 chan = &wiphy->bands[band]->channels[j];
4138
4139                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4140                                         continue;
4141
4142                                 request->channels[i] = chan;
4143                                 i++;
4144                         }
4145                 }
4146         }
4147
4148         if (!i) {
4149                 err = -EINVAL;
4150                 goto out_free;
4151         }
4152
4153         request->n_channels = i;
4154
4155         i = 0;
4156         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4157                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4158                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4159                                 err = -EINVAL;
4160                                 goto out_free;
4161                         }
4162                         request->ssids[i].ssid_len = nla_len(attr);
4163                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4164                         i++;
4165                 }
4166         }
4167
4168         if (info->attrs[NL80211_ATTR_IE]) {
4169                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4170                 memcpy((void *)request->ie,
4171                        nla_data(info->attrs[NL80211_ATTR_IE]),
4172                        request->ie_len);
4173         }
4174
4175         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4176                 if (wiphy->bands[i])
4177                         request->rates[i] =
4178                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4179
4180         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4181                 nla_for_each_nested(attr,
4182                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4183                                     tmp) {
4184                         enum ieee80211_band band = nla_type(attr);
4185
4186                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4187                                 err = -EINVAL;
4188                                 goto out_free;
4189                         }
4190                         err = ieee80211_get_ratemask(wiphy->bands[band],
4191                                                      nla_data(attr),
4192                                                      nla_len(attr),
4193                                                      &request->rates[band]);
4194                         if (err)
4195                                 goto out_free;
4196                 }
4197         }
4198
4199         request->no_cck =
4200                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4201
4202         request->dev = dev;
4203         request->wiphy = &rdev->wiphy;
4204
4205         rdev->scan_req = request;
4206         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4207
4208         if (!err) {
4209                 nl80211_send_scan_start(rdev, dev);
4210                 dev_hold(dev);
4211         } else {
4212  out_free:
4213                 rdev->scan_req = NULL;
4214                 kfree(request);
4215         }
4216
4217         return err;
4218 }
4219
4220 static int nl80211_start_sched_scan(struct sk_buff *skb,
4221                                     struct genl_info *info)
4222 {
4223         struct cfg80211_sched_scan_request *request;
4224         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4225         struct net_device *dev = info->user_ptr[1];
4226         struct nlattr *attr;
4227         struct wiphy *wiphy;
4228         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4229         u32 interval;
4230         enum ieee80211_band band;
4231         size_t ie_len;
4232         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4233
4234         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4235             !rdev->ops->sched_scan_start)
4236                 return -EOPNOTSUPP;
4237
4238         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4239                 return -EINVAL;
4240
4241         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4242                 return -EINVAL;
4243
4244         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4245         if (interval == 0)
4246                 return -EINVAL;
4247
4248         wiphy = &rdev->wiphy;
4249
4250         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4251                 n_channels = validate_scan_freqs(
4252                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4253                 if (!n_channels)
4254                         return -EINVAL;
4255         } else {
4256                 n_channels = 0;
4257
4258                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4259                         if (wiphy->bands[band])
4260                                 n_channels += wiphy->bands[band]->n_channels;
4261         }
4262
4263         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4264                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4265                                     tmp)
4266                         n_ssids++;
4267
4268         if (n_ssids > wiphy->max_sched_scan_ssids)
4269                 return -EINVAL;
4270
4271         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4272                 nla_for_each_nested(attr,
4273                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4274                                     tmp)
4275                         n_match_sets++;
4276
4277         if (n_match_sets > wiphy->max_match_sets)
4278                 return -EINVAL;
4279
4280         if (info->attrs[NL80211_ATTR_IE])
4281                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4282         else
4283                 ie_len = 0;
4284
4285         if (ie_len > wiphy->max_sched_scan_ie_len)
4286                 return -EINVAL;
4287
4288         mutex_lock(&rdev->sched_scan_mtx);
4289
4290         if (rdev->sched_scan_req) {
4291                 err = -EINPROGRESS;
4292                 goto out;
4293         }
4294
4295         request = kzalloc(sizeof(*request)
4296                         + sizeof(*request->ssids) * n_ssids
4297                         + sizeof(*request->match_sets) * n_match_sets
4298                         + sizeof(*request->channels) * n_channels
4299                         + ie_len, GFP_KERNEL);
4300         if (!request) {
4301                 err = -ENOMEM;
4302                 goto out;
4303         }
4304
4305         if (n_ssids)
4306                 request->ssids = (void *)&request->channels[n_channels];
4307         request->n_ssids = n_ssids;
4308         if (ie_len) {
4309                 if (request->ssids)
4310                         request->ie = (void *)(request->ssids + n_ssids);
4311                 else
4312                         request->ie = (void *)(request->channels + n_channels);
4313         }
4314
4315         if (n_match_sets) {
4316                 if (request->ie)
4317                         request->match_sets = (void *)(request->ie + ie_len);
4318                 else if (request->ssids)
4319                         request->match_sets =
4320                                 (void *)(request->ssids + n_ssids);
4321                 else
4322                         request->match_sets =
4323                                 (void *)(request->channels + n_channels);
4324         }
4325         request->n_match_sets = n_match_sets;
4326
4327         i = 0;
4328         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4329                 /* user specified, bail out if channel not found */
4330                 nla_for_each_nested(attr,
4331                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4332                                     tmp) {
4333                         struct ieee80211_channel *chan;
4334
4335                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4336
4337                         if (!chan) {
4338                                 err = -EINVAL;
4339                                 goto out_free;
4340                         }
4341
4342                         /* ignore disabled channels */
4343                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4344                                 continue;
4345
4346                         request->channels[i] = chan;
4347                         i++;
4348                 }
4349         } else {
4350                 /* all channels */
4351                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4352                         int j;
4353                         if (!wiphy->bands[band])
4354                                 continue;
4355                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4356                                 struct ieee80211_channel *chan;
4357
4358                                 chan = &wiphy->bands[band]->channels[j];
4359
4360                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4361                                         continue;
4362
4363                                 request->channels[i] = chan;
4364                                 i++;
4365                         }
4366                 }
4367         }
4368
4369         if (!i) {
4370                 err = -EINVAL;
4371                 goto out_free;
4372         }
4373
4374         request->n_channels = i;
4375
4376         i = 0;
4377         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4378                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4379                                     tmp) {
4380                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4381                                 err = -EINVAL;
4382                                 goto out_free;
4383                         }
4384                         request->ssids[i].ssid_len = nla_len(attr);
4385                         memcpy(request->ssids[i].ssid, nla_data(attr),
4386                                nla_len(attr));
4387                         i++;
4388                 }
4389         }
4390
4391         i = 0;
4392         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4393                 nla_for_each_nested(attr,
4394                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4395                                     tmp) {
4396                         struct nlattr *ssid, *rssi;
4397
4398                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4399                                   nla_data(attr), nla_len(attr),
4400                                   nl80211_match_policy);
4401                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4402                         if (ssid) {
4403                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4404                                         err = -EINVAL;
4405                                         goto out_free;
4406                                 }
4407                                 memcpy(request->match_sets[i].ssid.ssid,
4408                                        nla_data(ssid), nla_len(ssid));
4409                                 request->match_sets[i].ssid.ssid_len =
4410                                         nla_len(ssid);
4411                         }
4412                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4413                         if (rssi)
4414                                 request->rssi_thold = nla_get_u32(rssi);
4415                         else
4416                                 request->rssi_thold =
4417                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4418                         i++;
4419                 }
4420         }
4421
4422         if (info->attrs[NL80211_ATTR_IE]) {
4423                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4424                 memcpy((void *)request->ie,
4425                        nla_data(info->attrs[NL80211_ATTR_IE]),
4426                        request->ie_len);
4427         }
4428
4429         request->dev = dev;
4430         request->wiphy = &rdev->wiphy;
4431         request->interval = interval;
4432
4433         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4434         if (!err) {
4435                 rdev->sched_scan_req = request;
4436                 nl80211_send_sched_scan(rdev, dev,
4437                                         NL80211_CMD_START_SCHED_SCAN);
4438                 goto out;
4439         }
4440
4441 out_free:
4442         kfree(request);
4443 out:
4444         mutex_unlock(&rdev->sched_scan_mtx);
4445         return err;
4446 }
4447
4448 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4449                                    struct genl_info *info)
4450 {
4451         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4452         int err;
4453
4454         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4455             !rdev->ops->sched_scan_stop)
4456                 return -EOPNOTSUPP;
4457
4458         mutex_lock(&rdev->sched_scan_mtx);
4459         err = __cfg80211_stop_sched_scan(rdev, false);
4460         mutex_unlock(&rdev->sched_scan_mtx);
4461
4462         return err;
4463 }
4464
4465 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4466                             u32 seq, int flags,
4467                             struct cfg80211_registered_device *rdev,
4468                             struct wireless_dev *wdev,
4469                             struct cfg80211_internal_bss *intbss)
4470 {
4471         struct cfg80211_bss *res = &intbss->pub;
4472         void *hdr;
4473         struct nlattr *bss;
4474
4475         ASSERT_WDEV_LOCK(wdev);
4476
4477         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4478                              NL80211_CMD_NEW_SCAN_RESULTS);
4479         if (!hdr)
4480                 return -1;
4481
4482         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4483
4484         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4485             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4486                 goto nla_put_failure;
4487
4488         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4489         if (!bss)
4490                 goto nla_put_failure;
4491         if ((!is_zero_ether_addr(res->bssid) &&
4492              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4493             (res->information_elements && res->len_information_elements &&
4494              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4495                      res->len_information_elements,
4496                      res->information_elements)) ||
4497             (res->beacon_ies && res->len_beacon_ies &&
4498              res->beacon_ies != res->information_elements &&
4499              nla_put(msg, NL80211_BSS_BEACON_IES,
4500                      res->len_beacon_ies, res->beacon_ies)))
4501                 goto nla_put_failure;
4502         if (res->tsf &&
4503             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4504                 goto nla_put_failure;
4505         if (res->beacon_interval &&
4506             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4507                 goto nla_put_failure;
4508         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4509             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4510             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4511                         jiffies_to_msecs(jiffies - intbss->ts)))
4512                 goto nla_put_failure;
4513
4514         switch (rdev->wiphy.signal_type) {
4515         case CFG80211_SIGNAL_TYPE_MBM:
4516                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4517                         goto nla_put_failure;
4518                 break;
4519         case CFG80211_SIGNAL_TYPE_UNSPEC:
4520                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4521                         goto nla_put_failure;
4522                 break;
4523         default:
4524                 break;
4525         }
4526
4527         switch (wdev->iftype) {
4528         case NL80211_IFTYPE_P2P_CLIENT:
4529         case NL80211_IFTYPE_STATION:
4530                 if (intbss == wdev->current_bss &&
4531                     nla_put_u32(msg, NL80211_BSS_STATUS,
4532                                 NL80211_BSS_STATUS_ASSOCIATED))
4533                         goto nla_put_failure;
4534                 break;
4535         case NL80211_IFTYPE_ADHOC:
4536                 if (intbss == wdev->current_bss &&
4537                     nla_put_u32(msg, NL80211_BSS_STATUS,
4538                                 NL80211_BSS_STATUS_IBSS_JOINED))
4539                         goto nla_put_failure;
4540                 break;
4541         default:
4542                 break;
4543         }
4544
4545         nla_nest_end(msg, bss);
4546
4547         return genlmsg_end(msg, hdr);
4548
4549  nla_put_failure:
4550         genlmsg_cancel(msg, hdr);
4551         return -EMSGSIZE;
4552 }
4553
4554 static int nl80211_dump_scan(struct sk_buff *skb,
4555                              struct netlink_callback *cb)
4556 {
4557         struct cfg80211_registered_device *rdev;
4558         struct net_device *dev;
4559         struct cfg80211_internal_bss *scan;
4560         struct wireless_dev *wdev;
4561         int start = cb->args[1], idx = 0;
4562         int err;
4563
4564         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4565         if (err)
4566                 return err;
4567
4568         wdev = dev->ieee80211_ptr;
4569
4570         wdev_lock(wdev);
4571         spin_lock_bh(&rdev->bss_lock);
4572         cfg80211_bss_expire(rdev);
4573
4574         cb->seq = rdev->bss_generation;
4575
4576         list_for_each_entry(scan, &rdev->bss_list, list) {
4577                 if (++idx <= start)
4578                         continue;
4579                 if (nl80211_send_bss(skb, cb,
4580                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4581                                 rdev, wdev, scan) < 0) {
4582                         idx--;
4583                         break;
4584                 }
4585         }
4586
4587         spin_unlock_bh(&rdev->bss_lock);
4588         wdev_unlock(wdev);
4589
4590         cb->args[1] = idx;
4591         nl80211_finish_netdev_dump(rdev);
4592
4593         return skb->len;
4594 }
4595
4596 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4597                                 int flags, struct net_device *dev,
4598                                 struct survey_info *survey)
4599 {
4600         void *hdr;
4601         struct nlattr *infoattr;
4602
4603         hdr = nl80211hdr_put(msg, pid, seq, flags,
4604                              NL80211_CMD_NEW_SURVEY_RESULTS);
4605         if (!hdr)
4606                 return -ENOMEM;
4607
4608         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4609                 goto nla_put_failure;
4610
4611         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4612         if (!infoattr)
4613                 goto nla_put_failure;
4614
4615         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4616                         survey->channel->center_freq))
4617                 goto nla_put_failure;
4618
4619         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4620             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4621                 goto nla_put_failure;
4622         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4623             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4624                 goto nla_put_failure;
4625         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4626             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4627                         survey->channel_time))
4628                 goto nla_put_failure;
4629         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4630             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4631                         survey->channel_time_busy))
4632                 goto nla_put_failure;
4633         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4634             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4635                         survey->channel_time_ext_busy))
4636                 goto nla_put_failure;
4637         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4638             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4639                         survey->channel_time_rx))
4640                 goto nla_put_failure;
4641         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4642             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4643                         survey->channel_time_tx))
4644                 goto nla_put_failure;
4645
4646         nla_nest_end(msg, infoattr);
4647
4648         return genlmsg_end(msg, hdr);
4649
4650  nla_put_failure:
4651         genlmsg_cancel(msg, hdr);
4652         return -EMSGSIZE;
4653 }
4654
4655 static int nl80211_dump_survey(struct sk_buff *skb,
4656                         struct netlink_callback *cb)
4657 {
4658         struct survey_info survey;
4659         struct cfg80211_registered_device *dev;
4660         struct net_device *netdev;
4661         int survey_idx = cb->args[1];
4662         int res;
4663
4664         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4665         if (res)
4666                 return res;
4667
4668         if (!dev->ops->dump_survey) {
4669                 res = -EOPNOTSUPP;
4670                 goto out_err;
4671         }
4672
4673         while (1) {
4674                 struct ieee80211_channel *chan;
4675
4676                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4677                                             &survey);
4678                 if (res == -ENOENT)
4679                         break;
4680                 if (res)
4681                         goto out_err;
4682
4683                 /* Survey without a channel doesn't make sense */
4684                 if (!survey.channel) {
4685                         res = -EINVAL;
4686                         goto out;
4687                 }
4688
4689                 chan = ieee80211_get_channel(&dev->wiphy,
4690                                              survey.channel->center_freq);
4691                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4692                         survey_idx++;
4693                         continue;
4694                 }
4695
4696                 if (nl80211_send_survey(skb,
4697                                 NETLINK_CB(cb->skb).pid,
4698                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4699                                 netdev,
4700                                 &survey) < 0)
4701                         goto out;
4702                 survey_idx++;
4703         }
4704
4705  out:
4706         cb->args[1] = survey_idx;
4707         res = skb->len;
4708  out_err:
4709         nl80211_finish_netdev_dump(dev);
4710         return res;
4711 }
4712
4713 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4714 {
4715         return auth_type <= NL80211_AUTHTYPE_MAX;
4716 }
4717
4718 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4719 {
4720         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4721                                   NL80211_WPA_VERSION_2));
4722 }
4723
4724 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4725 {
4726         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4727         struct net_device *dev = info->user_ptr[1];
4728         struct ieee80211_channel *chan;
4729         const u8 *bssid, *ssid, *ie = NULL;
4730         int err, ssid_len, ie_len = 0;
4731         enum nl80211_auth_type auth_type;
4732         struct key_parse key;
4733         bool local_state_change;
4734
4735         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4736                 return -EINVAL;
4737
4738         if (!info->attrs[NL80211_ATTR_MAC])
4739                 return -EINVAL;
4740
4741         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4742                 return -EINVAL;
4743
4744         if (!info->attrs[NL80211_ATTR_SSID])
4745                 return -EINVAL;
4746
4747         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4748                 return -EINVAL;
4749
4750         err = nl80211_parse_key(info, &key);
4751         if (err)
4752                 return err;
4753
4754         if (key.idx >= 0) {
4755                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4756                         return -EINVAL;
4757                 if (!key.p.key || !key.p.key_len)
4758                         return -EINVAL;
4759                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4760                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4761                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4762                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4763                         return -EINVAL;
4764                 if (key.idx > 4)
4765                         return -EINVAL;
4766         } else {
4767                 key.p.key_len = 0;
4768                 key.p.key = NULL;
4769         }
4770
4771         if (key.idx >= 0) {
4772                 int i;
4773                 bool ok = false;
4774                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4775                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4776                                 ok = true;
4777                                 break;
4778                         }
4779                 }
4780                 if (!ok)
4781                         return -EINVAL;
4782         }
4783
4784         if (!rdev->ops->auth)
4785                 return -EOPNOTSUPP;
4786
4787         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4788             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4789                 return -EOPNOTSUPP;
4790
4791         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4792         chan = ieee80211_get_channel(&rdev->wiphy,
4793                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4794         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4795                 return -EINVAL;
4796
4797         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4798         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4799
4800         if (info->attrs[NL80211_ATTR_IE]) {
4801                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4802                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4803         }
4804
4805         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4806         if (!nl80211_valid_auth_type(auth_type))
4807                 return -EINVAL;
4808
4809         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4810
4811         /*
4812          * Since we no longer track auth state, ignore
4813          * requests to only change local state.
4814          */
4815         if (local_state_change)
4816                 return 0;
4817
4818         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4819                                   ssid, ssid_len, ie, ie_len,
4820                                   key.p.key, key.p.key_len, key.idx);
4821 }
4822
4823 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4824                                    struct genl_info *info,
4825                                    struct cfg80211_crypto_settings *settings,
4826                                    int cipher_limit)
4827 {
4828         memset(settings, 0, sizeof(*settings));
4829
4830         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4831
4832         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4833                 u16 proto;
4834                 proto = nla_get_u16(
4835                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4836                 settings->control_port_ethertype = cpu_to_be16(proto);
4837                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4838                     proto != ETH_P_PAE)
4839                         return -EINVAL;
4840                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4841                         settings->control_port_no_encrypt = true;
4842         } else
4843                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4844
4845         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4846                 void *data;
4847                 int len, i;
4848
4849                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4850                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4851                 settings->n_ciphers_pairwise = len / sizeof(u32);
4852
4853                 if (len % sizeof(u32))
4854                         return -EINVAL;
4855
4856                 if (settings->n_ciphers_pairwise > cipher_limit)
4857                         return -EINVAL;
4858
4859                 memcpy(settings->ciphers_pairwise, data, len);
4860
4861                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4862                         if (!cfg80211_supported_cipher_suite(
4863                                         &rdev->wiphy,
4864                                         settings->ciphers_pairwise[i]))
4865                                 return -EINVAL;
4866         }
4867
4868         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4869                 settings->cipher_group =
4870                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4871                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4872                                                      settings->cipher_group))
4873                         return -EINVAL;
4874         }
4875
4876         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4877                 settings->wpa_versions =
4878                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4879                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4880                         return -EINVAL;
4881         }
4882
4883         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4884                 void *data;
4885                 int len;
4886
4887                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4888                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4889                 settings->n_akm_suites = len / sizeof(u32);
4890
4891                 if (len % sizeof(u32))
4892                         return -EINVAL;
4893
4894                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4895                         return -EINVAL;
4896
4897                 memcpy(settings->akm_suites, data, len);
4898         }
4899
4900         return 0;
4901 }
4902
4903 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4904 {
4905         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4906         struct net_device *dev = info->user_ptr[1];
4907         struct cfg80211_crypto_settings crypto;
4908         struct ieee80211_channel *chan;
4909         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4910         int err, ssid_len, ie_len = 0;
4911         bool use_mfp = false;
4912         u32 flags = 0;
4913         struct ieee80211_ht_cap *ht_capa = NULL;
4914         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4915
4916         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4917                 return -EINVAL;
4918
4919         if (!info->attrs[NL80211_ATTR_MAC] ||
4920             !info->attrs[NL80211_ATTR_SSID] ||
4921             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4922                 return -EINVAL;
4923
4924         if (!rdev->ops->assoc)
4925                 return -EOPNOTSUPP;
4926
4927         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4928             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4929                 return -EOPNOTSUPP;
4930
4931         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4932
4933         chan = ieee80211_get_channel(&rdev->wiphy,
4934                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4935         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4936                 return -EINVAL;
4937
4938         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4939         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4940
4941         if (info->attrs[NL80211_ATTR_IE]) {
4942                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4943                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4944         }
4945
4946         if (info->attrs[NL80211_ATTR_USE_MFP]) {
4947                 enum nl80211_mfp mfp =
4948                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
4949                 if (mfp == NL80211_MFP_REQUIRED)
4950                         use_mfp = true;
4951                 else if (mfp != NL80211_MFP_NO)
4952                         return -EINVAL;
4953         }
4954
4955         if (info->attrs[NL80211_ATTR_PREV_BSSID])
4956                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
4957
4958         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
4959                 flags |= ASSOC_REQ_DISABLE_HT;
4960
4961         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
4962                 ht_capa_mask =
4963                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
4964
4965         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
4966                 if (!ht_capa_mask)
4967                         return -EINVAL;
4968                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
4969         }
4970
4971         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
4972         if (!err)
4973                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
4974                                           ssid, ssid_len, ie, ie_len, use_mfp,
4975                                           &crypto, flags, ht_capa,
4976                                           ht_capa_mask);
4977
4978         return err;
4979 }
4980
4981 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
4982 {
4983         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4984         struct net_device *dev = info->user_ptr[1];
4985         const u8 *ie = NULL, *bssid;
4986         int ie_len = 0;
4987         u16 reason_code;
4988         bool local_state_change;
4989
4990         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4991                 return -EINVAL;
4992
4993         if (!info->attrs[NL80211_ATTR_MAC])
4994                 return -EINVAL;
4995
4996         if (!info->attrs[NL80211_ATTR_REASON_CODE])
4997                 return -EINVAL;
4998
4999         if (!rdev->ops->deauth)
5000                 return -EOPNOTSUPP;
5001
5002         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5003             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5004                 return -EOPNOTSUPP;
5005
5006         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5007
5008         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5009         if (reason_code == 0) {
5010                 /* Reason Code 0 is reserved */
5011                 return -EINVAL;
5012         }
5013
5014         if (info->attrs[NL80211_ATTR_IE]) {
5015                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5016                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5017         }
5018
5019         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5020
5021         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5022                                     local_state_change);
5023 }
5024
5025 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5026 {
5027         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5028         struct net_device *dev = info->user_ptr[1];
5029         const u8 *ie = NULL, *bssid;
5030         int ie_len = 0;
5031         u16 reason_code;
5032         bool local_state_change;
5033
5034         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5035                 return -EINVAL;
5036
5037         if (!info->attrs[NL80211_ATTR_MAC])
5038                 return -EINVAL;
5039
5040         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5041                 return -EINVAL;
5042
5043         if (!rdev->ops->disassoc)
5044                 return -EOPNOTSUPP;
5045
5046         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5047             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5048                 return -EOPNOTSUPP;
5049
5050         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5051
5052         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5053         if (reason_code == 0) {
5054                 /* Reason Code 0 is reserved */
5055                 return -EINVAL;
5056         }
5057
5058         if (info->attrs[NL80211_ATTR_IE]) {
5059                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5060                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5061         }
5062
5063         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5064
5065         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5066                                       local_state_change);
5067 }
5068
5069 static bool
5070 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5071                          int mcast_rate[IEEE80211_NUM_BANDS],
5072                          int rateval)
5073 {
5074         struct wiphy *wiphy = &rdev->wiphy;
5075         bool found = false;
5076         int band, i;
5077
5078         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5079                 struct ieee80211_supported_band *sband;
5080
5081                 sband = wiphy->bands[band];
5082                 if (!sband)
5083                         continue;
5084
5085                 for (i = 0; i < sband->n_bitrates; i++) {
5086                         if (sband->bitrates[i].bitrate == rateval) {
5087                                 mcast_rate[band] = i + 1;
5088                                 found = true;
5089                                 break;
5090                         }
5091                 }
5092         }
5093
5094         return found;
5095 }
5096
5097 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5098 {
5099         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5100         struct net_device *dev = info->user_ptr[1];
5101         struct cfg80211_ibss_params ibss;
5102         struct wiphy *wiphy;
5103         struct cfg80211_cached_keys *connkeys = NULL;
5104         int err;
5105
5106         memset(&ibss, 0, sizeof(ibss));
5107
5108         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5109                 return -EINVAL;
5110
5111         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5112             !info->attrs[NL80211_ATTR_SSID] ||
5113             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5114                 return -EINVAL;
5115
5116         ibss.beacon_interval = 100;
5117
5118         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5119                 ibss.beacon_interval =
5120                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5121                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5122                         return -EINVAL;
5123         }
5124
5125         if (!rdev->ops->join_ibss)
5126                 return -EOPNOTSUPP;
5127
5128         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5129                 return -EOPNOTSUPP;
5130
5131         wiphy = &rdev->wiphy;
5132
5133         if (info->attrs[NL80211_ATTR_MAC]) {
5134                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5135
5136                 if (!is_valid_ether_addr(ibss.bssid))
5137                         return -EINVAL;
5138         }
5139         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5140         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5141
5142         if (info->attrs[NL80211_ATTR_IE]) {
5143                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5144                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5145         }
5146
5147         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5148                 enum nl80211_channel_type channel_type;
5149
5150                 if (!nl80211_valid_channel_type(info, &channel_type))
5151                         return -EINVAL;
5152
5153                 if (channel_type != NL80211_CHAN_NO_HT &&
5154                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5155                         return -EINVAL;
5156
5157                 ibss.channel_type = channel_type;
5158         } else {
5159                 ibss.channel_type = NL80211_CHAN_NO_HT;
5160         }
5161
5162         ibss.channel = rdev_freq_to_chan(rdev,
5163                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5164                 ibss.channel_type);
5165         if (!ibss.channel ||
5166             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5167             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5168                 return -EINVAL;
5169
5170         /* Both channels should be able to initiate communication */
5171         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5172              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5173             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5174                                           ibss.channel_type))
5175                 return -EINVAL;
5176
5177         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5178         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5179
5180         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5181                 u8 *rates =
5182                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5183                 int n_rates =
5184                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5185                 struct ieee80211_supported_band *sband =
5186                         wiphy->bands[ibss.channel->band];
5187
5188                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5189                                              &ibss.basic_rates);
5190                 if (err)
5191                         return err;
5192         }
5193
5194         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5195             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5196                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5197                 return -EINVAL;
5198
5199         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5200                 connkeys = nl80211_parse_connkeys(rdev,
5201                                         info->attrs[NL80211_ATTR_KEYS]);
5202                 if (IS_ERR(connkeys))
5203                         return PTR_ERR(connkeys);
5204         }
5205
5206         ibss.control_port =
5207                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5208
5209         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5210         if (err)
5211                 kfree(connkeys);
5212         return err;
5213 }
5214
5215 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5216 {
5217         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5218         struct net_device *dev = info->user_ptr[1];
5219
5220         if (!rdev->ops->leave_ibss)
5221                 return -EOPNOTSUPP;
5222
5223         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5224                 return -EOPNOTSUPP;
5225
5226         return cfg80211_leave_ibss(rdev, dev, false);
5227 }
5228
5229 #ifdef CONFIG_NL80211_TESTMODE
5230 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5231         .name = "testmode",
5232 };
5233
5234 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5235 {
5236         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5237         int err;
5238
5239         if (!info->attrs[NL80211_ATTR_TESTDATA])
5240                 return -EINVAL;
5241
5242         err = -EOPNOTSUPP;
5243         if (rdev->ops->testmode_cmd) {
5244                 rdev->testmode_info = info;
5245                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5246                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5247                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5248                 rdev->testmode_info = NULL;
5249         }
5250
5251         return err;
5252 }
5253
5254 static int nl80211_testmode_dump(struct sk_buff *skb,
5255                                  struct netlink_callback *cb)
5256 {
5257         struct cfg80211_registered_device *rdev;
5258         int err;
5259         long phy_idx;
5260         void *data = NULL;
5261         int data_len = 0;
5262
5263         if (cb->args[0]) {
5264                 /*
5265                  * 0 is a valid index, but not valid for args[0],
5266                  * so we need to offset by 1.
5267                  */
5268                 phy_idx = cb->args[0] - 1;
5269         } else {
5270                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5271                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5272                                   nl80211_policy);
5273                 if (err)
5274                         return err;
5275
5276                 mutex_lock(&cfg80211_mutex);
5277                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5278                                                   nl80211_fam.attrbuf);
5279                 if (IS_ERR(rdev)) {
5280                         mutex_unlock(&cfg80211_mutex);
5281                         return PTR_ERR(rdev);
5282                 }
5283                 phy_idx = rdev->wiphy_idx;
5284                 rdev = NULL;
5285                 mutex_unlock(&cfg80211_mutex);
5286
5287                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5288                         cb->args[1] =
5289                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5290         }
5291
5292         if (cb->args[1]) {
5293                 data = nla_data((void *)cb->args[1]);
5294                 data_len = nla_len((void *)cb->args[1]);
5295         }
5296
5297         mutex_lock(&cfg80211_mutex);
5298         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5299         if (!rdev) {
5300                 mutex_unlock(&cfg80211_mutex);
5301                 return -ENOENT;
5302         }
5303         cfg80211_lock_rdev(rdev);
5304         mutex_unlock(&cfg80211_mutex);
5305
5306         if (!rdev->ops->testmode_dump) {
5307                 err = -EOPNOTSUPP;
5308                 goto out_err;
5309         }
5310
5311         while (1) {
5312                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5313                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5314                                            NL80211_CMD_TESTMODE);
5315                 struct nlattr *tmdata;
5316
5317                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5318                         genlmsg_cancel(skb, hdr);
5319                         break;
5320                 }
5321
5322                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5323                 if (!tmdata) {
5324                         genlmsg_cancel(skb, hdr);
5325                         break;
5326                 }
5327                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5328                                                data, data_len);
5329                 nla_nest_end(skb, tmdata);
5330
5331                 if (err == -ENOBUFS || err == -ENOENT) {
5332                         genlmsg_cancel(skb, hdr);
5333                         break;
5334                 } else if (err) {
5335                         genlmsg_cancel(skb, hdr);
5336                         goto out_err;
5337                 }
5338
5339                 genlmsg_end(skb, hdr);
5340         }
5341
5342         err = skb->len;
5343         /* see above */
5344         cb->args[0] = phy_idx + 1;
5345  out_err:
5346         cfg80211_unlock_rdev(rdev);
5347         return err;
5348 }
5349
5350 static struct sk_buff *
5351 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5352                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5353 {
5354         struct sk_buff *skb;
5355         void *hdr;
5356         struct nlattr *data;
5357
5358         skb = nlmsg_new(approxlen + 100, gfp);
5359         if (!skb)
5360                 return NULL;
5361
5362         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5363         if (!hdr) {
5364                 kfree_skb(skb);
5365                 return NULL;
5366         }
5367
5368         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5369                 goto nla_put_failure;
5370         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5371
5372         ((void **)skb->cb)[0] = rdev;
5373         ((void **)skb->cb)[1] = hdr;
5374         ((void **)skb->cb)[2] = data;
5375
5376         return skb;
5377
5378  nla_put_failure:
5379         kfree_skb(skb);
5380         return NULL;
5381 }
5382
5383 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5384                                                   int approxlen)
5385 {
5386         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5387
5388         if (WARN_ON(!rdev->testmode_info))
5389                 return NULL;
5390
5391         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5392                                 rdev->testmode_info->snd_pid,
5393                                 rdev->testmode_info->snd_seq,
5394                                 GFP_KERNEL);
5395 }
5396 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5397
5398 int cfg80211_testmode_reply(struct sk_buff *skb)
5399 {
5400         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5401         void *hdr = ((void **)skb->cb)[1];
5402         struct nlattr *data = ((void **)skb->cb)[2];
5403
5404         if (WARN_ON(!rdev->testmode_info)) {
5405                 kfree_skb(skb);
5406                 return -EINVAL;
5407         }
5408
5409         nla_nest_end(skb, data);
5410         genlmsg_end(skb, hdr);
5411         return genlmsg_reply(skb, rdev->testmode_info);
5412 }
5413 EXPORT_SYMBOL(cfg80211_testmode_reply);
5414
5415 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5416                                                   int approxlen, gfp_t gfp)
5417 {
5418         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5419
5420         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5421 }
5422 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5423
5424 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5425 {
5426         void *hdr = ((void **)skb->cb)[1];
5427         struct nlattr *data = ((void **)skb->cb)[2];
5428
5429         nla_nest_end(skb, data);
5430         genlmsg_end(skb, hdr);
5431         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5432 }
5433 EXPORT_SYMBOL(cfg80211_testmode_event);
5434 #endif
5435
5436 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5437 {
5438         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5439         struct net_device *dev = info->user_ptr[1];
5440         struct cfg80211_connect_params connect;
5441         struct wiphy *wiphy;
5442         struct cfg80211_cached_keys *connkeys = NULL;
5443         int err;
5444
5445         memset(&connect, 0, sizeof(connect));
5446
5447         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5448                 return -EINVAL;
5449
5450         if (!info->attrs[NL80211_ATTR_SSID] ||
5451             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5452                 return -EINVAL;
5453
5454         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5455                 connect.auth_type =
5456                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5457                 if (!nl80211_valid_auth_type(connect.auth_type))
5458                         return -EINVAL;
5459         } else
5460                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5461
5462         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5463
5464         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5465                                       NL80211_MAX_NR_CIPHER_SUITES);
5466         if (err)
5467                 return err;
5468
5469         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5470             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5471                 return -EOPNOTSUPP;
5472
5473         wiphy = &rdev->wiphy;
5474
5475         connect.bg_scan_period = -1;
5476         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5477                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5478                 connect.bg_scan_period =
5479                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5480         }
5481
5482         if (info->attrs[NL80211_ATTR_MAC])
5483                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5484         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5485         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5486
5487         if (info->attrs[NL80211_ATTR_IE]) {
5488                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5489                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5490         }
5491
5492         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5493                 connect.channel =
5494                         ieee80211_get_channel(wiphy,
5495                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5496                 if (!connect.channel ||
5497                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5498                         return -EINVAL;
5499         }
5500
5501         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5502                 connkeys = nl80211_parse_connkeys(rdev,
5503                                         info->attrs[NL80211_ATTR_KEYS]);
5504                 if (IS_ERR(connkeys))
5505                         return PTR_ERR(connkeys);
5506         }
5507
5508         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5509                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5510
5511         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5512                 memcpy(&connect.ht_capa_mask,
5513                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5514                        sizeof(connect.ht_capa_mask));
5515
5516         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5517                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5518                         return -EINVAL;
5519                 memcpy(&connect.ht_capa,
5520                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5521                        sizeof(connect.ht_capa));
5522         }
5523
5524         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5525         if (err)
5526                 kfree(connkeys);
5527         return err;
5528 }
5529
5530 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5531 {
5532         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5533         struct net_device *dev = info->user_ptr[1];
5534         u16 reason;
5535
5536         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5537                 reason = WLAN_REASON_DEAUTH_LEAVING;
5538         else
5539                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5540
5541         if (reason == 0)
5542                 return -EINVAL;
5543
5544         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5545             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5546                 return -EOPNOTSUPP;
5547
5548         return cfg80211_disconnect(rdev, dev, reason, true);
5549 }
5550
5551 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5552 {
5553         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5554         struct net *net;
5555         int err;
5556         u32 pid;
5557
5558         if (!info->attrs[NL80211_ATTR_PID])
5559                 return -EINVAL;
5560
5561         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5562
5563         net = get_net_ns_by_pid(pid);
5564         if (IS_ERR(net))
5565                 return PTR_ERR(net);
5566
5567         err = 0;
5568
5569         /* check if anything to do */
5570         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5571                 err = cfg80211_switch_netns(rdev, net);
5572
5573         put_net(net);
5574         return err;
5575 }
5576
5577 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5578 {
5579         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5580         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5581                         struct cfg80211_pmksa *pmksa) = NULL;
5582         struct net_device *dev = info->user_ptr[1];
5583         struct cfg80211_pmksa pmksa;
5584
5585         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5586
5587         if (!info->attrs[NL80211_ATTR_MAC])
5588                 return -EINVAL;
5589
5590         if (!info->attrs[NL80211_ATTR_PMKID])
5591                 return -EINVAL;
5592
5593         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5594         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5595
5596         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5597             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5598                 return -EOPNOTSUPP;
5599
5600         switch (info->genlhdr->cmd) {
5601         case NL80211_CMD_SET_PMKSA:
5602                 rdev_ops = rdev->ops->set_pmksa;
5603                 break;
5604         case NL80211_CMD_DEL_PMKSA:
5605                 rdev_ops = rdev->ops->del_pmksa;
5606                 break;
5607         default:
5608                 WARN_ON(1);
5609                 break;
5610         }
5611
5612         if (!rdev_ops)
5613                 return -EOPNOTSUPP;
5614
5615         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5616 }
5617
5618 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5619 {
5620         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5621         struct net_device *dev = info->user_ptr[1];
5622
5623         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5624             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5625                 return -EOPNOTSUPP;
5626
5627         if (!rdev->ops->flush_pmksa)
5628                 return -EOPNOTSUPP;
5629
5630         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5631 }
5632
5633 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5634 {
5635         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5636         struct net_device *dev = info->user_ptr[1];
5637         u8 action_code, dialog_token;
5638         u16 status_code;
5639         u8 *peer;
5640
5641         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5642             !rdev->ops->tdls_mgmt)
5643                 return -EOPNOTSUPP;
5644
5645         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5646             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5647             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5648             !info->attrs[NL80211_ATTR_IE] ||
5649             !info->attrs[NL80211_ATTR_MAC])
5650                 return -EINVAL;
5651
5652         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5653         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5654         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5655         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5656
5657         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5658                                     dialog_token, status_code,
5659                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5660                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5661 }
5662
5663 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5664 {
5665         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5666         struct net_device *dev = info->user_ptr[1];
5667         enum nl80211_tdls_operation operation;
5668         u8 *peer;
5669
5670         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5671             !rdev->ops->tdls_oper)
5672                 return -EOPNOTSUPP;
5673
5674         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5675             !info->attrs[NL80211_ATTR_MAC])
5676                 return -EINVAL;
5677
5678         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5679         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5680
5681         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5682 }
5683
5684 static int nl80211_remain_on_channel(struct sk_buff *skb,
5685                                      struct genl_info *info)
5686 {
5687         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5688         struct net_device *dev = info->user_ptr[1];
5689         struct ieee80211_channel *chan;
5690         struct sk_buff *msg;
5691         void *hdr;
5692         u64 cookie;
5693         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5694         u32 freq, duration;
5695         int err;
5696
5697         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5698             !info->attrs[NL80211_ATTR_DURATION])
5699                 return -EINVAL;
5700
5701         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5702
5703         if (!rdev->ops->remain_on_channel ||
5704             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5705                 return -EOPNOTSUPP;
5706
5707         /*
5708          * We should be on that channel for at least a minimum amount of
5709          * time (10ms) but no longer than the driver supports.
5710          */
5711         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5712             duration > rdev->wiphy.max_remain_on_channel_duration)
5713                 return -EINVAL;
5714
5715         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5716             !nl80211_valid_channel_type(info, &channel_type))
5717                 return -EINVAL;
5718
5719         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5720         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5721         if (chan == NULL)
5722                 return -EINVAL;
5723
5724         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5725         if (!msg)
5726                 return -ENOMEM;
5727
5728         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5729                              NL80211_CMD_REMAIN_ON_CHANNEL);
5730
5731         if (IS_ERR(hdr)) {
5732                 err = PTR_ERR(hdr);
5733                 goto free_msg;
5734         }
5735
5736         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5737                                            channel_type, duration, &cookie);
5738
5739         if (err)
5740                 goto free_msg;
5741
5742         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5743                 goto nla_put_failure;
5744
5745         genlmsg_end(msg, hdr);
5746
5747         return genlmsg_reply(msg, info);
5748
5749  nla_put_failure:
5750         err = -ENOBUFS;
5751  free_msg:
5752         nlmsg_free(msg);
5753         return err;
5754 }
5755
5756 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5757                                             struct genl_info *info)
5758 {
5759         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5760         struct net_device *dev = info->user_ptr[1];
5761         u64 cookie;
5762
5763         if (!info->attrs[NL80211_ATTR_COOKIE])
5764                 return -EINVAL;
5765
5766         if (!rdev->ops->cancel_remain_on_channel)
5767                 return -EOPNOTSUPP;
5768
5769         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5770
5771         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5772 }
5773
5774 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5775                            u8 *rates, u8 rates_len)
5776 {
5777         u8 i;
5778         u32 mask = 0;
5779
5780         for (i = 0; i < rates_len; i++) {
5781                 int rate = (rates[i] & 0x7f) * 5;
5782                 int ridx;
5783                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5784                         struct ieee80211_rate *srate =
5785                                 &sband->bitrates[ridx];
5786                         if (rate == srate->bitrate) {
5787                                 mask |= 1 << ridx;
5788                                 break;
5789                         }
5790                 }
5791                 if (ridx == sband->n_bitrates)
5792                         return 0; /* rate not found */
5793         }
5794
5795         return mask;
5796 }
5797
5798 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5799                                u8 *rates, u8 rates_len,
5800                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5801 {
5802         u8 i;
5803
5804         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5805
5806         for (i = 0; i < rates_len; i++) {
5807                 int ridx, rbit;
5808
5809                 ridx = rates[i] / 8;
5810                 rbit = BIT(rates[i] % 8);
5811
5812                 /* check validity */
5813                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5814                         return false;
5815
5816                 /* check availability */
5817                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5818                         mcs[ridx] |= rbit;
5819                 else
5820                         return false;
5821         }
5822
5823         return true;
5824 }
5825
5826 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5827         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5828                                     .len = NL80211_MAX_SUPP_RATES },
5829         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5830                                  .len = NL80211_MAX_SUPP_HT_RATES },
5831 };
5832
5833 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5834                                        struct genl_info *info)
5835 {
5836         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5837         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5838         struct cfg80211_bitrate_mask mask;
5839         int rem, i;
5840         struct net_device *dev = info->user_ptr[1];
5841         struct nlattr *tx_rates;
5842         struct ieee80211_supported_band *sband;
5843
5844         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5845                 return -EINVAL;
5846
5847         if (!rdev->ops->set_bitrate_mask)
5848                 return -EOPNOTSUPP;
5849
5850         memset(&mask, 0, sizeof(mask));
5851         /* Default to all rates enabled */
5852         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5853                 sband = rdev->wiphy.bands[i];
5854                 mask.control[i].legacy =
5855                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5856                 if (sband)
5857                         memcpy(mask.control[i].mcs,
5858                                sband->ht_cap.mcs.rx_mask,
5859                                sizeof(mask.control[i].mcs));
5860                 else
5861                         memset(mask.control[i].mcs, 0,
5862                                sizeof(mask.control[i].mcs));
5863         }
5864
5865         /*
5866          * The nested attribute uses enum nl80211_band as the index. This maps
5867          * directly to the enum ieee80211_band values used in cfg80211.
5868          */
5869         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5870         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5871         {
5872                 enum ieee80211_band band = nla_type(tx_rates);
5873                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5874                         return -EINVAL;
5875                 sband = rdev->wiphy.bands[band];
5876                 if (sband == NULL)
5877                         return -EINVAL;
5878                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5879                           nla_len(tx_rates), nl80211_txattr_policy);
5880                 if (tb[NL80211_TXRATE_LEGACY]) {
5881                         mask.control[band].legacy = rateset_to_mask(
5882                                 sband,
5883                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5884                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5885                         if ((mask.control[band].legacy == 0) &&
5886                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5887                                 return -EINVAL;
5888                 }
5889                 if (tb[NL80211_TXRATE_MCS]) {
5890                         if (!ht_rateset_to_mask(
5891                                         sband,
5892                                         nla_data(tb[NL80211_TXRATE_MCS]),
5893                                         nla_len(tb[NL80211_TXRATE_MCS]),
5894                                         mask.control[band].mcs))
5895                                 return -EINVAL;
5896                 }
5897
5898                 if (mask.control[band].legacy == 0) {
5899                         /* don't allow empty legacy rates if HT
5900                          * is not even supported. */
5901                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5902                                 return -EINVAL;
5903
5904                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5905                                 if (mask.control[band].mcs[i])
5906                                         break;
5907
5908                         /* legacy and mcs rates may not be both empty */
5909                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5910                                 return -EINVAL;
5911                 }
5912         }
5913
5914         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5915 }
5916
5917 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5918 {
5919         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5920         struct net_device *dev = info->user_ptr[1];
5921         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5922
5923         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5924                 return -EINVAL;
5925
5926         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5927                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5928
5929         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5930             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5931             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5932             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5933             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5934             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5935             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5936                 return -EOPNOTSUPP;
5937
5938         /* not much point in registering if we can't reply */
5939         if (!rdev->ops->mgmt_tx)
5940                 return -EOPNOTSUPP;
5941
5942         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
5943                         frame_type,
5944                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
5945                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
5946 }
5947
5948 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
5949 {
5950         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5951         struct net_device *dev = info->user_ptr[1];
5952         struct ieee80211_channel *chan;
5953         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5954         bool channel_type_valid = false;
5955         u32 freq;
5956         int err;
5957         void *hdr = NULL;
5958         u64 cookie;
5959         struct sk_buff *msg = NULL;
5960         unsigned int wait = 0;
5961         bool offchan, no_cck, dont_wait_for_ack;
5962
5963         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
5964
5965         if (!info->attrs[NL80211_ATTR_FRAME] ||
5966             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5967                 return -EINVAL;
5968
5969         if (!rdev->ops->mgmt_tx)
5970                 return -EOPNOTSUPP;
5971
5972         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5973             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5974             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5975             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5976             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5977             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5978             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5979                 return -EOPNOTSUPP;
5980
5981         if (info->attrs[NL80211_ATTR_DURATION]) {
5982                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
5983                         return -EINVAL;
5984                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5985
5986                 /*
5987                  * We should wait on the channel for at least a minimum amount
5988                  * of time (10ms) but no longer than the driver supports.
5989                  */
5990                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5991                     wait > rdev->wiphy.max_remain_on_channel_duration)
5992                         return -EINVAL;
5993
5994         }
5995
5996         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5997                 if (!nl80211_valid_channel_type(info, &channel_type))
5998                         return -EINVAL;
5999                 channel_type_valid = true;
6000         }
6001
6002         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6003
6004         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6005                 return -EINVAL;
6006
6007         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6008
6009         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6010         chan = rdev_freq_to_chan(rdev, freq, channel_type);
6011         if (chan == NULL)
6012                 return -EINVAL;
6013
6014         if (!dont_wait_for_ack) {
6015                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6016                 if (!msg)
6017                         return -ENOMEM;
6018
6019                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6020                                      NL80211_CMD_FRAME);
6021
6022                 if (IS_ERR(hdr)) {
6023                         err = PTR_ERR(hdr);
6024                         goto free_msg;
6025                 }
6026         }
6027
6028         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
6029                                     channel_type_valid, wait,
6030                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6031                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6032                                     no_cck, dont_wait_for_ack, &cookie);
6033         if (err)
6034                 goto free_msg;
6035
6036         if (msg) {
6037                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6038                         goto nla_put_failure;
6039
6040                 genlmsg_end(msg, hdr);
6041                 return genlmsg_reply(msg, info);
6042         }
6043
6044         return 0;
6045
6046  nla_put_failure:
6047         err = -ENOBUFS;
6048  free_msg:
6049         nlmsg_free(msg);
6050         return err;
6051 }
6052
6053 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6054 {
6055         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6056         struct net_device *dev = info->user_ptr[1];
6057         u64 cookie;
6058
6059         if (!info->attrs[NL80211_ATTR_COOKIE])
6060                 return -EINVAL;
6061
6062         if (!rdev->ops->mgmt_tx_cancel_wait)
6063                 return -EOPNOTSUPP;
6064
6065         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6066             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6067             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6068             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6069             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6070             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6071                 return -EOPNOTSUPP;
6072
6073         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6074
6075         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6076 }
6077
6078 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6079 {
6080         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6081         struct wireless_dev *wdev;
6082         struct net_device *dev = info->user_ptr[1];
6083         u8 ps_state;
6084         bool state;
6085         int err;
6086
6087         if (!info->attrs[NL80211_ATTR_PS_STATE])
6088                 return -EINVAL;
6089
6090         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6091
6092         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6093                 return -EINVAL;
6094
6095         wdev = dev->ieee80211_ptr;
6096
6097         if (!rdev->ops->set_power_mgmt)
6098                 return -EOPNOTSUPP;
6099
6100         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6101
6102         if (state == wdev->ps)
6103                 return 0;
6104
6105         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6106                                         wdev->ps_timeout);
6107         if (!err)
6108                 wdev->ps = state;
6109         return err;
6110 }
6111
6112 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6113 {
6114         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6115         enum nl80211_ps_state ps_state;
6116         struct wireless_dev *wdev;
6117         struct net_device *dev = info->user_ptr[1];
6118         struct sk_buff *msg;
6119         void *hdr;
6120         int err;
6121
6122         wdev = dev->ieee80211_ptr;
6123
6124         if (!rdev->ops->set_power_mgmt)
6125                 return -EOPNOTSUPP;
6126
6127         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6128         if (!msg)
6129                 return -ENOMEM;
6130
6131         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6132                              NL80211_CMD_GET_POWER_SAVE);
6133         if (!hdr) {
6134                 err = -ENOBUFS;
6135                 goto free_msg;
6136         }
6137
6138         if (wdev->ps)
6139                 ps_state = NL80211_PS_ENABLED;
6140         else
6141                 ps_state = NL80211_PS_DISABLED;
6142
6143         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6144                 goto nla_put_failure;
6145
6146         genlmsg_end(msg, hdr);
6147         return genlmsg_reply(msg, info);
6148
6149  nla_put_failure:
6150         err = -ENOBUFS;
6151  free_msg:
6152         nlmsg_free(msg);
6153         return err;
6154 }
6155
6156 static struct nla_policy
6157 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6158         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6159         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6160         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6161 };
6162
6163 static int nl80211_set_cqm_rssi(struct genl_info *info,
6164                                 s32 threshold, u32 hysteresis)
6165 {
6166         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6167         struct wireless_dev *wdev;
6168         struct net_device *dev = info->user_ptr[1];
6169
6170         if (threshold > 0)
6171                 return -EINVAL;
6172
6173         wdev = dev->ieee80211_ptr;
6174
6175         if (!rdev->ops->set_cqm_rssi_config)
6176                 return -EOPNOTSUPP;
6177
6178         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6179             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6180                 return -EOPNOTSUPP;
6181
6182         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6183                                               threshold, hysteresis);
6184 }
6185
6186 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6187 {
6188         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6189         struct nlattr *cqm;
6190         int err;
6191
6192         cqm = info->attrs[NL80211_ATTR_CQM];
6193         if (!cqm) {
6194                 err = -EINVAL;
6195                 goto out;
6196         }
6197
6198         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6199                                nl80211_attr_cqm_policy);
6200         if (err)
6201                 goto out;
6202
6203         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6204             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6205                 s32 threshold;
6206                 u32 hysteresis;
6207                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6208                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6209                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6210         } else
6211                 err = -EINVAL;
6212
6213 out:
6214         return err;
6215 }
6216
6217 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6218 {
6219         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6220         struct net_device *dev = info->user_ptr[1];
6221         struct mesh_config cfg;
6222         struct mesh_setup setup;
6223         int err;
6224
6225         /* start with default */
6226         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6227         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6228
6229         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6230                 /* and parse parameters if given */
6231                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6232                 if (err)
6233                         return err;
6234         }
6235
6236         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6237             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6238                 return -EINVAL;
6239
6240         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6241         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6242
6243         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6244             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6245                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6246                         return -EINVAL;
6247
6248         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6249                 /* parse additional setup parameters if given */
6250                 err = nl80211_parse_mesh_setup(info, &setup);
6251                 if (err)
6252                         return err;
6253         }
6254
6255         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6256                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6257
6258                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6259                     !nl80211_valid_channel_type(info, &channel_type))
6260                         return -EINVAL;
6261
6262                 setup.channel = rdev_freq_to_chan(rdev,
6263                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6264                         channel_type);
6265                 if (!setup.channel)
6266                         return -EINVAL;
6267                 setup.channel_type = channel_type;
6268         } else {
6269                 /* cfg80211_join_mesh() will sort it out */
6270                 setup.channel = NULL;
6271         }
6272
6273         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6274 }
6275
6276 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6277 {
6278         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6279         struct net_device *dev = info->user_ptr[1];
6280
6281         return cfg80211_leave_mesh(rdev, dev);
6282 }
6283
6284 #ifdef CONFIG_PM
6285 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6286 {
6287         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6288         struct sk_buff *msg;
6289         void *hdr;
6290
6291         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6292                 return -EOPNOTSUPP;
6293
6294         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6295         if (!msg)
6296                 return -ENOMEM;
6297
6298         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6299                              NL80211_CMD_GET_WOWLAN);
6300         if (!hdr)
6301                 goto nla_put_failure;
6302
6303         if (rdev->wowlan) {
6304                 struct nlattr *nl_wowlan;
6305
6306                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6307                 if (!nl_wowlan)
6308                         goto nla_put_failure;
6309
6310                 if ((rdev->wowlan->any &&
6311                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6312                     (rdev->wowlan->disconnect &&
6313                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6314                     (rdev->wowlan->magic_pkt &&
6315                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6316                     (rdev->wowlan->gtk_rekey_failure &&
6317                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6318                     (rdev->wowlan->eap_identity_req &&
6319                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6320                     (rdev->wowlan->four_way_handshake &&
6321                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6322                     (rdev->wowlan->rfkill_release &&
6323                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6324                         goto nla_put_failure;
6325                 if (rdev->wowlan->n_patterns) {
6326                         struct nlattr *nl_pats, *nl_pat;
6327                         int i, pat_len;
6328
6329                         nl_pats = nla_nest_start(msg,
6330                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6331                         if (!nl_pats)
6332                                 goto nla_put_failure;
6333
6334                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6335                                 nl_pat = nla_nest_start(msg, i + 1);
6336                                 if (!nl_pat)
6337                                         goto nla_put_failure;
6338                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6339                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6340                                             DIV_ROUND_UP(pat_len, 8),
6341                                             rdev->wowlan->patterns[i].mask) ||
6342                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6343                                             pat_len,
6344                                             rdev->wowlan->patterns[i].pattern))
6345                                         goto nla_put_failure;
6346                                 nla_nest_end(msg, nl_pat);
6347                         }
6348                         nla_nest_end(msg, nl_pats);
6349                 }
6350
6351                 nla_nest_end(msg, nl_wowlan);
6352         }
6353
6354         genlmsg_end(msg, hdr);
6355         return genlmsg_reply(msg, info);
6356
6357 nla_put_failure:
6358         nlmsg_free(msg);
6359         return -ENOBUFS;
6360 }
6361
6362 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6363 {
6364         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6365         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6366         struct cfg80211_wowlan no_triggers = {};
6367         struct cfg80211_wowlan new_triggers = {};
6368         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6369         int err, i;
6370         bool prev_enabled = rdev->wowlan;
6371
6372         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6373                 return -EOPNOTSUPP;
6374
6375         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6376                 goto no_triggers;
6377
6378         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6379                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6380                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6381                         nl80211_wowlan_policy);
6382         if (err)
6383                 return err;
6384
6385         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6386                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6387                         return -EINVAL;
6388                 new_triggers.any = true;
6389         }
6390
6391         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6392                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6393                         return -EINVAL;
6394                 new_triggers.disconnect = true;
6395         }
6396
6397         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6398                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6399                         return -EINVAL;
6400                 new_triggers.magic_pkt = true;
6401         }
6402
6403         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6404                 return -EINVAL;
6405
6406         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6407                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6408                         return -EINVAL;
6409                 new_triggers.gtk_rekey_failure = true;
6410         }
6411
6412         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6413                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6414                         return -EINVAL;
6415                 new_triggers.eap_identity_req = true;
6416         }
6417
6418         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6419                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6420                         return -EINVAL;
6421                 new_triggers.four_way_handshake = true;
6422         }
6423
6424         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6425                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6426                         return -EINVAL;
6427                 new_triggers.rfkill_release = true;
6428         }
6429
6430         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6431                 struct nlattr *pat;
6432                 int n_patterns = 0;
6433                 int rem, pat_len, mask_len;
6434                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6435
6436                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6437                                     rem)
6438                         n_patterns++;
6439                 if (n_patterns > wowlan->n_patterns)
6440                         return -EINVAL;
6441
6442                 new_triggers.patterns = kcalloc(n_patterns,
6443                                                 sizeof(new_triggers.patterns[0]),
6444                                                 GFP_KERNEL);
6445                 if (!new_triggers.patterns)
6446                         return -ENOMEM;
6447
6448                 new_triggers.n_patterns = n_patterns;
6449                 i = 0;
6450
6451                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6452                                     rem) {
6453                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6454                                   nla_data(pat), nla_len(pat), NULL);
6455                         err = -EINVAL;
6456                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6457                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6458                                 goto error;
6459                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6460                         mask_len = DIV_ROUND_UP(pat_len, 8);
6461                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6462                             mask_len)
6463                                 goto error;
6464                         if (pat_len > wowlan->pattern_max_len ||
6465                             pat_len < wowlan->pattern_min_len)
6466                                 goto error;
6467
6468                         new_triggers.patterns[i].mask =
6469                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6470                         if (!new_triggers.patterns[i].mask) {
6471                                 err = -ENOMEM;
6472                                 goto error;
6473                         }
6474                         new_triggers.patterns[i].pattern =
6475                                 new_triggers.patterns[i].mask + mask_len;
6476                         memcpy(new_triggers.patterns[i].mask,
6477                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6478                                mask_len);
6479                         new_triggers.patterns[i].pattern_len = pat_len;
6480                         memcpy(new_triggers.patterns[i].pattern,
6481                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6482                                pat_len);
6483                         i++;
6484                 }
6485         }
6486
6487         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6488                 struct cfg80211_wowlan *ntrig;
6489                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6490                                 GFP_KERNEL);
6491                 if (!ntrig) {
6492                         err = -ENOMEM;
6493                         goto error;
6494                 }
6495                 cfg80211_rdev_free_wowlan(rdev);
6496                 rdev->wowlan = ntrig;
6497         } else {
6498  no_triggers:
6499                 cfg80211_rdev_free_wowlan(rdev);
6500                 rdev->wowlan = NULL;
6501         }
6502
6503         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6504                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6505
6506         return 0;
6507  error:
6508         for (i = 0; i < new_triggers.n_patterns; i++)
6509                 kfree(new_triggers.patterns[i].mask);
6510         kfree(new_triggers.patterns);
6511         return err;
6512 }
6513 #endif
6514
6515 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6516 {
6517         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6518         struct net_device *dev = info->user_ptr[1];
6519         struct wireless_dev *wdev = dev->ieee80211_ptr;
6520         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6521         struct cfg80211_gtk_rekey_data rekey_data;
6522         int err;
6523
6524         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6525                 return -EINVAL;
6526
6527         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6528                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6529                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6530                         nl80211_rekey_policy);
6531         if (err)
6532                 return err;
6533
6534         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6535                 return -ERANGE;
6536         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6537                 return -ERANGE;
6538         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6539                 return -ERANGE;
6540
6541         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6542                NL80211_KEK_LEN);
6543         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6544                NL80211_KCK_LEN);
6545         memcpy(rekey_data.replay_ctr,
6546                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6547                NL80211_REPLAY_CTR_LEN);
6548
6549         wdev_lock(wdev);
6550         if (!wdev->current_bss) {
6551                 err = -ENOTCONN;
6552                 goto out;
6553         }
6554
6555         if (!rdev->ops->set_rekey_data) {
6556                 err = -EOPNOTSUPP;
6557                 goto out;
6558         }
6559
6560         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6561  out:
6562         wdev_unlock(wdev);
6563         return err;
6564 }
6565
6566 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6567                                              struct genl_info *info)
6568 {
6569         struct net_device *dev = info->user_ptr[1];
6570         struct wireless_dev *wdev = dev->ieee80211_ptr;
6571
6572         if (wdev->iftype != NL80211_IFTYPE_AP &&
6573             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6574                 return -EINVAL;
6575
6576         if (wdev->ap_unexpected_nlpid)
6577                 return -EBUSY;
6578
6579         wdev->ap_unexpected_nlpid = info->snd_pid;
6580         return 0;
6581 }
6582
6583 static int nl80211_probe_client(struct sk_buff *skb,
6584                                 struct genl_info *info)
6585 {
6586         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6587         struct net_device *dev = info->user_ptr[1];
6588         struct wireless_dev *wdev = dev->ieee80211_ptr;
6589         struct sk_buff *msg;
6590         void *hdr;
6591         const u8 *addr;
6592         u64 cookie;
6593         int err;
6594
6595         if (wdev->iftype != NL80211_IFTYPE_AP &&
6596             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6597                 return -EOPNOTSUPP;
6598
6599         if (!info->attrs[NL80211_ATTR_MAC])
6600                 return -EINVAL;
6601
6602         if (!rdev->ops->probe_client)
6603                 return -EOPNOTSUPP;
6604
6605         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6606         if (!msg)
6607                 return -ENOMEM;
6608
6609         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6610                              NL80211_CMD_PROBE_CLIENT);
6611
6612         if (IS_ERR(hdr)) {
6613                 err = PTR_ERR(hdr);
6614                 goto free_msg;
6615         }
6616
6617         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6618
6619         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6620         if (err)
6621                 goto free_msg;
6622
6623         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6624                 goto nla_put_failure;
6625
6626         genlmsg_end(msg, hdr);
6627
6628         return genlmsg_reply(msg, info);
6629
6630  nla_put_failure:
6631         err = -ENOBUFS;
6632  free_msg:
6633         nlmsg_free(msg);
6634         return err;
6635 }
6636
6637 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6638 {
6639         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6640
6641         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6642                 return -EOPNOTSUPP;
6643
6644         if (rdev->ap_beacons_nlpid)
6645                 return -EBUSY;
6646
6647         rdev->ap_beacons_nlpid = info->snd_pid;
6648
6649         return 0;
6650 }
6651
6652 #define NL80211_FLAG_NEED_WIPHY         0x01
6653 #define NL80211_FLAG_NEED_NETDEV        0x02
6654 #define NL80211_FLAG_NEED_RTNL          0x04
6655 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6656 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6657                                          NL80211_FLAG_CHECK_NETDEV_UP)
6658
6659 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6660                             struct genl_info *info)
6661 {
6662         struct cfg80211_registered_device *rdev;
6663         struct net_device *dev;
6664         int err;
6665         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6666
6667         if (rtnl)
6668                 rtnl_lock();
6669
6670         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6671                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6672                 if (IS_ERR(rdev)) {
6673                         if (rtnl)
6674                                 rtnl_unlock();
6675                         return PTR_ERR(rdev);
6676                 }
6677                 info->user_ptr[0] = rdev;
6678         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6679                 err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
6680                                               &rdev, &dev);
6681                 if (err) {
6682                         if (rtnl)
6683                                 rtnl_unlock();
6684                         return err;
6685                 }
6686                 if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6687                     !netif_running(dev)) {
6688                         cfg80211_unlock_rdev(rdev);
6689                         dev_put(dev);
6690                         if (rtnl)
6691                                 rtnl_unlock();
6692                         return -ENETDOWN;
6693                 }
6694                 info->user_ptr[0] = rdev;
6695                 info->user_ptr[1] = dev;
6696         }
6697
6698         return 0;
6699 }
6700
6701 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6702                               struct genl_info *info)
6703 {
6704         if (info->user_ptr[0])
6705                 cfg80211_unlock_rdev(info->user_ptr[0]);
6706         if (info->user_ptr[1])
6707                 dev_put(info->user_ptr[1]);
6708         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6709                 rtnl_unlock();
6710 }
6711
6712 static struct genl_ops nl80211_ops[] = {
6713         {
6714                 .cmd = NL80211_CMD_GET_WIPHY,
6715                 .doit = nl80211_get_wiphy,
6716                 .dumpit = nl80211_dump_wiphy,
6717                 .policy = nl80211_policy,
6718                 /* can be retrieved by unprivileged users */
6719                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6720         },
6721         {
6722                 .cmd = NL80211_CMD_SET_WIPHY,
6723                 .doit = nl80211_set_wiphy,
6724                 .policy = nl80211_policy,
6725                 .flags = GENL_ADMIN_PERM,
6726                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6727         },
6728         {
6729                 .cmd = NL80211_CMD_GET_INTERFACE,
6730                 .doit = nl80211_get_interface,
6731                 .dumpit = nl80211_dump_interface,
6732                 .policy = nl80211_policy,
6733                 /* can be retrieved by unprivileged users */
6734                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6735         },
6736         {
6737                 .cmd = NL80211_CMD_SET_INTERFACE,
6738                 .doit = nl80211_set_interface,
6739                 .policy = nl80211_policy,
6740                 .flags = GENL_ADMIN_PERM,
6741                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6742                                   NL80211_FLAG_NEED_RTNL,
6743         },
6744         {
6745                 .cmd = NL80211_CMD_NEW_INTERFACE,
6746                 .doit = nl80211_new_interface,
6747                 .policy = nl80211_policy,
6748                 .flags = GENL_ADMIN_PERM,
6749                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6750                                   NL80211_FLAG_NEED_RTNL,
6751         },
6752         {
6753                 .cmd = NL80211_CMD_DEL_INTERFACE,
6754                 .doit = nl80211_del_interface,
6755                 .policy = nl80211_policy,
6756                 .flags = GENL_ADMIN_PERM,
6757                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6758                                   NL80211_FLAG_NEED_RTNL,
6759         },
6760         {
6761                 .cmd = NL80211_CMD_GET_KEY,
6762                 .doit = nl80211_get_key,
6763                 .policy = nl80211_policy,
6764                 .flags = GENL_ADMIN_PERM,
6765                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6766                                   NL80211_FLAG_NEED_RTNL,
6767         },
6768         {
6769                 .cmd = NL80211_CMD_SET_KEY,
6770                 .doit = nl80211_set_key,
6771                 .policy = nl80211_policy,
6772                 .flags = GENL_ADMIN_PERM,
6773                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6774                                   NL80211_FLAG_NEED_RTNL,
6775         },
6776         {
6777                 .cmd = NL80211_CMD_NEW_KEY,
6778                 .doit = nl80211_new_key,
6779                 .policy = nl80211_policy,
6780                 .flags = GENL_ADMIN_PERM,
6781                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6782                                   NL80211_FLAG_NEED_RTNL,
6783         },
6784         {
6785                 .cmd = NL80211_CMD_DEL_KEY,
6786                 .doit = nl80211_del_key,
6787                 .policy = nl80211_policy,
6788                 .flags = GENL_ADMIN_PERM,
6789                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6790                                   NL80211_FLAG_NEED_RTNL,
6791         },
6792         {
6793                 .cmd = NL80211_CMD_SET_BEACON,
6794                 .policy = nl80211_policy,
6795                 .flags = GENL_ADMIN_PERM,
6796                 .doit = nl80211_set_beacon,
6797                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6798                                   NL80211_FLAG_NEED_RTNL,
6799         },
6800         {
6801                 .cmd = NL80211_CMD_START_AP,
6802                 .policy = nl80211_policy,
6803                 .flags = GENL_ADMIN_PERM,
6804                 .doit = nl80211_start_ap,
6805                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6806                                   NL80211_FLAG_NEED_RTNL,
6807         },
6808         {
6809                 .cmd = NL80211_CMD_STOP_AP,
6810                 .policy = nl80211_policy,
6811                 .flags = GENL_ADMIN_PERM,
6812                 .doit = nl80211_stop_ap,
6813                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6814                                   NL80211_FLAG_NEED_RTNL,
6815         },
6816         {
6817                 .cmd = NL80211_CMD_GET_STATION,
6818                 .doit = nl80211_get_station,
6819                 .dumpit = nl80211_dump_station,
6820                 .policy = nl80211_policy,
6821                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6822                                   NL80211_FLAG_NEED_RTNL,
6823         },
6824         {
6825                 .cmd = NL80211_CMD_SET_STATION,
6826                 .doit = nl80211_set_station,
6827                 .policy = nl80211_policy,
6828                 .flags = GENL_ADMIN_PERM,
6829                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6830                                   NL80211_FLAG_NEED_RTNL,
6831         },
6832         {
6833                 .cmd = NL80211_CMD_NEW_STATION,
6834                 .doit = nl80211_new_station,
6835                 .policy = nl80211_policy,
6836                 .flags = GENL_ADMIN_PERM,
6837                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6838                                   NL80211_FLAG_NEED_RTNL,
6839         },
6840         {
6841                 .cmd = NL80211_CMD_DEL_STATION,
6842                 .doit = nl80211_del_station,
6843                 .policy = nl80211_policy,
6844                 .flags = GENL_ADMIN_PERM,
6845                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6846                                   NL80211_FLAG_NEED_RTNL,
6847         },
6848         {
6849                 .cmd = NL80211_CMD_GET_MPATH,
6850                 .doit = nl80211_get_mpath,
6851                 .dumpit = nl80211_dump_mpath,
6852                 .policy = nl80211_policy,
6853                 .flags = GENL_ADMIN_PERM,
6854                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6855                                   NL80211_FLAG_NEED_RTNL,
6856         },
6857         {
6858                 .cmd = NL80211_CMD_SET_MPATH,
6859                 .doit = nl80211_set_mpath,
6860                 .policy = nl80211_policy,
6861                 .flags = GENL_ADMIN_PERM,
6862                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6863                                   NL80211_FLAG_NEED_RTNL,
6864         },
6865         {
6866                 .cmd = NL80211_CMD_NEW_MPATH,
6867                 .doit = nl80211_new_mpath,
6868                 .policy = nl80211_policy,
6869                 .flags = GENL_ADMIN_PERM,
6870                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6871                                   NL80211_FLAG_NEED_RTNL,
6872         },
6873         {
6874                 .cmd = NL80211_CMD_DEL_MPATH,
6875                 .doit = nl80211_del_mpath,
6876                 .policy = nl80211_policy,
6877                 .flags = GENL_ADMIN_PERM,
6878                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6879                                   NL80211_FLAG_NEED_RTNL,
6880         },
6881         {
6882                 .cmd = NL80211_CMD_SET_BSS,
6883                 .doit = nl80211_set_bss,
6884                 .policy = nl80211_policy,
6885                 .flags = GENL_ADMIN_PERM,
6886                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6887                                   NL80211_FLAG_NEED_RTNL,
6888         },
6889         {
6890                 .cmd = NL80211_CMD_GET_REG,
6891                 .doit = nl80211_get_reg,
6892                 .policy = nl80211_policy,
6893                 /* can be retrieved by unprivileged users */
6894         },
6895         {
6896                 .cmd = NL80211_CMD_SET_REG,
6897                 .doit = nl80211_set_reg,
6898                 .policy = nl80211_policy,
6899                 .flags = GENL_ADMIN_PERM,
6900         },
6901         {
6902                 .cmd = NL80211_CMD_REQ_SET_REG,
6903                 .doit = nl80211_req_set_reg,
6904                 .policy = nl80211_policy,
6905                 .flags = GENL_ADMIN_PERM,
6906         },
6907         {
6908                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
6909                 .doit = nl80211_get_mesh_config,
6910                 .policy = nl80211_policy,
6911                 /* can be retrieved by unprivileged users */
6912                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6913                                   NL80211_FLAG_NEED_RTNL,
6914         },
6915         {
6916                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
6917                 .doit = nl80211_update_mesh_config,
6918                 .policy = nl80211_policy,
6919                 .flags = GENL_ADMIN_PERM,
6920                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6921                                   NL80211_FLAG_NEED_RTNL,
6922         },
6923         {
6924                 .cmd = NL80211_CMD_TRIGGER_SCAN,
6925                 .doit = nl80211_trigger_scan,
6926                 .policy = nl80211_policy,
6927                 .flags = GENL_ADMIN_PERM,
6928                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6929                                   NL80211_FLAG_NEED_RTNL,
6930         },
6931         {
6932                 .cmd = NL80211_CMD_GET_SCAN,
6933                 .policy = nl80211_policy,
6934                 .dumpit = nl80211_dump_scan,
6935         },
6936         {
6937                 .cmd = NL80211_CMD_START_SCHED_SCAN,
6938                 .doit = nl80211_start_sched_scan,
6939                 .policy = nl80211_policy,
6940                 .flags = GENL_ADMIN_PERM,
6941                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6942                                   NL80211_FLAG_NEED_RTNL,
6943         },
6944         {
6945                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
6946                 .doit = nl80211_stop_sched_scan,
6947                 .policy = nl80211_policy,
6948                 .flags = GENL_ADMIN_PERM,
6949                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6950                                   NL80211_FLAG_NEED_RTNL,
6951         },
6952         {
6953                 .cmd = NL80211_CMD_AUTHENTICATE,
6954                 .doit = nl80211_authenticate,
6955                 .policy = nl80211_policy,
6956                 .flags = GENL_ADMIN_PERM,
6957                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6958                                   NL80211_FLAG_NEED_RTNL,
6959         },
6960         {
6961                 .cmd = NL80211_CMD_ASSOCIATE,
6962                 .doit = nl80211_associate,
6963                 .policy = nl80211_policy,
6964                 .flags = GENL_ADMIN_PERM,
6965                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6966                                   NL80211_FLAG_NEED_RTNL,
6967         },
6968         {
6969                 .cmd = NL80211_CMD_DEAUTHENTICATE,
6970                 .doit = nl80211_deauthenticate,
6971                 .policy = nl80211_policy,
6972                 .flags = GENL_ADMIN_PERM,
6973                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6974                                   NL80211_FLAG_NEED_RTNL,
6975         },
6976         {
6977                 .cmd = NL80211_CMD_DISASSOCIATE,
6978                 .doit = nl80211_disassociate,
6979                 .policy = nl80211_policy,
6980                 .flags = GENL_ADMIN_PERM,
6981                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6982                                   NL80211_FLAG_NEED_RTNL,
6983         },
6984         {
6985                 .cmd = NL80211_CMD_JOIN_IBSS,
6986                 .doit = nl80211_join_ibss,
6987                 .policy = nl80211_policy,
6988                 .flags = GENL_ADMIN_PERM,
6989                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6990                                   NL80211_FLAG_NEED_RTNL,
6991         },
6992         {
6993                 .cmd = NL80211_CMD_LEAVE_IBSS,
6994                 .doit = nl80211_leave_ibss,
6995                 .policy = nl80211_policy,
6996                 .flags = GENL_ADMIN_PERM,
6997                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6998                                   NL80211_FLAG_NEED_RTNL,
6999         },
7000 #ifdef CONFIG_NL80211_TESTMODE
7001         {
7002                 .cmd = NL80211_CMD_TESTMODE,
7003                 .doit = nl80211_testmode_do,
7004                 .dumpit = nl80211_testmode_dump,
7005                 .policy = nl80211_policy,
7006                 .flags = GENL_ADMIN_PERM,
7007                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7008                                   NL80211_FLAG_NEED_RTNL,
7009         },
7010 #endif
7011         {
7012                 .cmd = NL80211_CMD_CONNECT,
7013                 .doit = nl80211_connect,
7014                 .policy = nl80211_policy,
7015                 .flags = GENL_ADMIN_PERM,
7016                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7017                                   NL80211_FLAG_NEED_RTNL,
7018         },
7019         {
7020                 .cmd = NL80211_CMD_DISCONNECT,
7021                 .doit = nl80211_disconnect,
7022                 .policy = nl80211_policy,
7023                 .flags = GENL_ADMIN_PERM,
7024                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7025                                   NL80211_FLAG_NEED_RTNL,
7026         },
7027         {
7028                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7029                 .doit = nl80211_wiphy_netns,
7030                 .policy = nl80211_policy,
7031                 .flags = GENL_ADMIN_PERM,
7032                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7033                                   NL80211_FLAG_NEED_RTNL,
7034         },
7035         {
7036                 .cmd = NL80211_CMD_GET_SURVEY,
7037                 .policy = nl80211_policy,
7038                 .dumpit = nl80211_dump_survey,
7039         },
7040         {
7041                 .cmd = NL80211_CMD_SET_PMKSA,
7042                 .doit = nl80211_setdel_pmksa,
7043                 .policy = nl80211_policy,
7044                 .flags = GENL_ADMIN_PERM,
7045                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7046                                   NL80211_FLAG_NEED_RTNL,
7047         },
7048         {
7049                 .cmd = NL80211_CMD_DEL_PMKSA,
7050                 .doit = nl80211_setdel_pmksa,
7051                 .policy = nl80211_policy,
7052                 .flags = GENL_ADMIN_PERM,
7053                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7054                                   NL80211_FLAG_NEED_RTNL,
7055         },
7056         {
7057                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7058                 .doit = nl80211_flush_pmksa,
7059                 .policy = nl80211_policy,
7060                 .flags = GENL_ADMIN_PERM,
7061                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7062                                   NL80211_FLAG_NEED_RTNL,
7063         },
7064         {
7065                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7066                 .doit = nl80211_remain_on_channel,
7067                 .policy = nl80211_policy,
7068                 .flags = GENL_ADMIN_PERM,
7069                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7070                                   NL80211_FLAG_NEED_RTNL,
7071         },
7072         {
7073                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7074                 .doit = nl80211_cancel_remain_on_channel,
7075                 .policy = nl80211_policy,
7076                 .flags = GENL_ADMIN_PERM,
7077                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7078                                   NL80211_FLAG_NEED_RTNL,
7079         },
7080         {
7081                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7082                 .doit = nl80211_set_tx_bitrate_mask,
7083                 .policy = nl80211_policy,
7084                 .flags = GENL_ADMIN_PERM,
7085                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7086                                   NL80211_FLAG_NEED_RTNL,
7087         },
7088         {
7089                 .cmd = NL80211_CMD_REGISTER_FRAME,
7090                 .doit = nl80211_register_mgmt,
7091                 .policy = nl80211_policy,
7092                 .flags = GENL_ADMIN_PERM,
7093                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7094                                   NL80211_FLAG_NEED_RTNL,
7095         },
7096         {
7097                 .cmd = NL80211_CMD_FRAME,
7098                 .doit = nl80211_tx_mgmt,
7099                 .policy = nl80211_policy,
7100                 .flags = GENL_ADMIN_PERM,
7101                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7102                                   NL80211_FLAG_NEED_RTNL,
7103         },
7104         {
7105                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7106                 .doit = nl80211_tx_mgmt_cancel_wait,
7107                 .policy = nl80211_policy,
7108                 .flags = GENL_ADMIN_PERM,
7109                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7110                                   NL80211_FLAG_NEED_RTNL,
7111         },
7112         {
7113                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7114                 .doit = nl80211_set_power_save,
7115                 .policy = nl80211_policy,
7116                 .flags = GENL_ADMIN_PERM,
7117                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7118                                   NL80211_FLAG_NEED_RTNL,
7119         },
7120         {
7121                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7122                 .doit = nl80211_get_power_save,
7123                 .policy = nl80211_policy,
7124                 /* can be retrieved by unprivileged users */
7125                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7126                                   NL80211_FLAG_NEED_RTNL,
7127         },
7128         {
7129                 .cmd = NL80211_CMD_SET_CQM,
7130                 .doit = nl80211_set_cqm,
7131                 .policy = nl80211_policy,
7132                 .flags = GENL_ADMIN_PERM,
7133                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7134                                   NL80211_FLAG_NEED_RTNL,
7135         },
7136         {
7137                 .cmd = NL80211_CMD_SET_CHANNEL,
7138                 .doit = nl80211_set_channel,
7139                 .policy = nl80211_policy,
7140                 .flags = GENL_ADMIN_PERM,
7141                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7142                                   NL80211_FLAG_NEED_RTNL,
7143         },
7144         {
7145                 .cmd = NL80211_CMD_SET_WDS_PEER,
7146                 .doit = nl80211_set_wds_peer,
7147                 .policy = nl80211_policy,
7148                 .flags = GENL_ADMIN_PERM,
7149                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7150                                   NL80211_FLAG_NEED_RTNL,
7151         },
7152         {
7153                 .cmd = NL80211_CMD_JOIN_MESH,
7154                 .doit = nl80211_join_mesh,
7155                 .policy = nl80211_policy,
7156                 .flags = GENL_ADMIN_PERM,
7157                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7158                                   NL80211_FLAG_NEED_RTNL,
7159         },
7160         {
7161                 .cmd = NL80211_CMD_LEAVE_MESH,
7162                 .doit = nl80211_leave_mesh,
7163                 .policy = nl80211_policy,
7164                 .flags = GENL_ADMIN_PERM,
7165                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7166                                   NL80211_FLAG_NEED_RTNL,
7167         },
7168 #ifdef CONFIG_PM
7169         {
7170                 .cmd = NL80211_CMD_GET_WOWLAN,
7171                 .doit = nl80211_get_wowlan,
7172                 .policy = nl80211_policy,
7173                 /* can be retrieved by unprivileged users */
7174                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7175                                   NL80211_FLAG_NEED_RTNL,
7176         },
7177         {
7178                 .cmd = NL80211_CMD_SET_WOWLAN,
7179                 .doit = nl80211_set_wowlan,
7180                 .policy = nl80211_policy,
7181                 .flags = GENL_ADMIN_PERM,
7182                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7183                                   NL80211_FLAG_NEED_RTNL,
7184         },
7185 #endif
7186         {
7187                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7188                 .doit = nl80211_set_rekey_data,
7189                 .policy = nl80211_policy,
7190                 .flags = GENL_ADMIN_PERM,
7191                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7192                                   NL80211_FLAG_NEED_RTNL,
7193         },
7194         {
7195                 .cmd = NL80211_CMD_TDLS_MGMT,
7196                 .doit = nl80211_tdls_mgmt,
7197                 .policy = nl80211_policy,
7198                 .flags = GENL_ADMIN_PERM,
7199                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7200                                   NL80211_FLAG_NEED_RTNL,
7201         },
7202         {
7203                 .cmd = NL80211_CMD_TDLS_OPER,
7204                 .doit = nl80211_tdls_oper,
7205                 .policy = nl80211_policy,
7206                 .flags = GENL_ADMIN_PERM,
7207                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7208                                   NL80211_FLAG_NEED_RTNL,
7209         },
7210         {
7211                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7212                 .doit = nl80211_register_unexpected_frame,
7213                 .policy = nl80211_policy,
7214                 .flags = GENL_ADMIN_PERM,
7215                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7216                                   NL80211_FLAG_NEED_RTNL,
7217         },
7218         {
7219                 .cmd = NL80211_CMD_PROBE_CLIENT,
7220                 .doit = nl80211_probe_client,
7221                 .policy = nl80211_policy,
7222                 .flags = GENL_ADMIN_PERM,
7223                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7224                                   NL80211_FLAG_NEED_RTNL,
7225         },
7226         {
7227                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7228                 .doit = nl80211_register_beacons,
7229                 .policy = nl80211_policy,
7230                 .flags = GENL_ADMIN_PERM,
7231                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7232                                   NL80211_FLAG_NEED_RTNL,
7233         },
7234         {
7235                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7236                 .doit = nl80211_set_noack_map,
7237                 .policy = nl80211_policy,
7238                 .flags = GENL_ADMIN_PERM,
7239                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7240                                   NL80211_FLAG_NEED_RTNL,
7241         },
7242
7243 };
7244
7245 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7246         .name = "mlme",
7247 };
7248
7249 /* multicast groups */
7250 static struct genl_multicast_group nl80211_config_mcgrp = {
7251         .name = "config",
7252 };
7253 static struct genl_multicast_group nl80211_scan_mcgrp = {
7254         .name = "scan",
7255 };
7256 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7257         .name = "regulatory",
7258 };
7259
7260 /* notification functions */
7261
7262 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7263 {
7264         struct sk_buff *msg;
7265
7266         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7267         if (!msg)
7268                 return;
7269
7270         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7271                 nlmsg_free(msg);
7272                 return;
7273         }
7274
7275         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7276                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7277 }
7278
7279 static int nl80211_add_scan_req(struct sk_buff *msg,
7280                                 struct cfg80211_registered_device *rdev)
7281 {
7282         struct cfg80211_scan_request *req = rdev->scan_req;
7283         struct nlattr *nest;
7284         int i;
7285
7286         ASSERT_RDEV_LOCK(rdev);
7287
7288         if (WARN_ON(!req))
7289                 return 0;
7290
7291         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7292         if (!nest)
7293                 goto nla_put_failure;
7294         for (i = 0; i < req->n_ssids; i++) {
7295                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7296                         goto nla_put_failure;
7297         }
7298         nla_nest_end(msg, nest);
7299
7300         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7301         if (!nest)
7302                 goto nla_put_failure;
7303         for (i = 0; i < req->n_channels; i++) {
7304                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7305                         goto nla_put_failure;
7306         }
7307         nla_nest_end(msg, nest);
7308
7309         if (req->ie &&
7310             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7311                 goto nla_put_failure;
7312
7313         return 0;
7314  nla_put_failure:
7315         return -ENOBUFS;
7316 }
7317
7318 static int nl80211_send_scan_msg(struct sk_buff *msg,
7319                                  struct cfg80211_registered_device *rdev,
7320                                  struct net_device *netdev,
7321                                  u32 pid, u32 seq, int flags,
7322                                  u32 cmd)
7323 {
7324         void *hdr;
7325
7326         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7327         if (!hdr)
7328                 return -1;
7329
7330         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7331             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7332                 goto nla_put_failure;
7333
7334         /* ignore errors and send incomplete event anyway */
7335         nl80211_add_scan_req(msg, rdev);
7336
7337         return genlmsg_end(msg, hdr);
7338
7339  nla_put_failure:
7340         genlmsg_cancel(msg, hdr);
7341         return -EMSGSIZE;
7342 }
7343
7344 static int
7345 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7346                             struct cfg80211_registered_device *rdev,
7347                             struct net_device *netdev,
7348                             u32 pid, u32 seq, int flags, u32 cmd)
7349 {
7350         void *hdr;
7351
7352         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7353         if (!hdr)
7354                 return -1;
7355
7356         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7357             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7358                 goto nla_put_failure;
7359
7360         return genlmsg_end(msg, hdr);
7361
7362  nla_put_failure:
7363         genlmsg_cancel(msg, hdr);
7364         return -EMSGSIZE;
7365 }
7366
7367 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7368                              struct net_device *netdev)
7369 {
7370         struct sk_buff *msg;
7371
7372         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7373         if (!msg)
7374                 return;
7375
7376         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7377                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7378                 nlmsg_free(msg);
7379                 return;
7380         }
7381
7382         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7383                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7384 }
7385
7386 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7387                             struct net_device *netdev)
7388 {
7389         struct sk_buff *msg;
7390
7391         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7392         if (!msg)
7393                 return;
7394
7395         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7396                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7397                 nlmsg_free(msg);
7398                 return;
7399         }
7400
7401         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7402                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7403 }
7404
7405 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7406                                struct net_device *netdev)
7407 {
7408         struct sk_buff *msg;
7409
7410         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7411         if (!msg)
7412                 return;
7413
7414         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7415                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7416                 nlmsg_free(msg);
7417                 return;
7418         }
7419
7420         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7421                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7422 }
7423
7424 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7425                                      struct net_device *netdev)
7426 {
7427         struct sk_buff *msg;
7428
7429         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7430         if (!msg)
7431                 return;
7432
7433         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7434                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7435                 nlmsg_free(msg);
7436                 return;
7437         }
7438
7439         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7440                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7441 }
7442
7443 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7444                              struct net_device *netdev, u32 cmd)
7445 {
7446         struct sk_buff *msg;
7447
7448         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7449         if (!msg)
7450                 return;
7451
7452         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7453                 nlmsg_free(msg);
7454                 return;
7455         }
7456
7457         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7458                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7459 }
7460
7461 /*
7462  * This can happen on global regulatory changes or device specific settings
7463  * based on custom world regulatory domains.
7464  */
7465 void nl80211_send_reg_change_event(struct regulatory_request *request)
7466 {
7467         struct sk_buff *msg;
7468         void *hdr;
7469
7470         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7471         if (!msg)
7472                 return;
7473
7474         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7475         if (!hdr) {
7476                 nlmsg_free(msg);
7477                 return;
7478         }
7479
7480         /* Userspace can always count this one always being set */
7481         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7482                 goto nla_put_failure;
7483
7484         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7485                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7486                                NL80211_REGDOM_TYPE_WORLD))
7487                         goto nla_put_failure;
7488         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7489                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7490                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7491                         goto nla_put_failure;
7492         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7493                    request->intersect) {
7494                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7495                                NL80211_REGDOM_TYPE_INTERSECTION))
7496                         goto nla_put_failure;
7497         } else {
7498                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7499                                NL80211_REGDOM_TYPE_COUNTRY) ||
7500                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7501                                    request->alpha2))
7502                         goto nla_put_failure;
7503         }
7504
7505         if (wiphy_idx_valid(request->wiphy_idx) &&
7506             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7507                 goto nla_put_failure;
7508
7509         genlmsg_end(msg, hdr);
7510
7511         rcu_read_lock();
7512         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7513                                 GFP_ATOMIC);
7514         rcu_read_unlock();
7515
7516         return;
7517
7518 nla_put_failure:
7519         genlmsg_cancel(msg, hdr);
7520         nlmsg_free(msg);
7521 }
7522
7523 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7524                                     struct net_device *netdev,
7525                                     const u8 *buf, size_t len,
7526                                     enum nl80211_commands cmd, gfp_t gfp)
7527 {
7528         struct sk_buff *msg;
7529         void *hdr;
7530
7531         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7532         if (!msg)
7533                 return;
7534
7535         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7536         if (!hdr) {
7537                 nlmsg_free(msg);
7538                 return;
7539         }
7540
7541         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7542             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7543             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7544                 goto nla_put_failure;
7545
7546         genlmsg_end(msg, hdr);
7547
7548         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7549                                 nl80211_mlme_mcgrp.id, gfp);
7550         return;
7551
7552  nla_put_failure:
7553         genlmsg_cancel(msg, hdr);
7554         nlmsg_free(msg);
7555 }
7556
7557 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7558                           struct net_device *netdev, const u8 *buf,
7559                           size_t len, gfp_t gfp)
7560 {
7561         nl80211_send_mlme_event(rdev, netdev, buf, len,
7562                                 NL80211_CMD_AUTHENTICATE, gfp);
7563 }
7564
7565 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7566                            struct net_device *netdev, const u8 *buf,
7567                            size_t len, gfp_t gfp)
7568 {
7569         nl80211_send_mlme_event(rdev, netdev, buf, len,
7570                                 NL80211_CMD_ASSOCIATE, gfp);
7571 }
7572
7573 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7574                          struct net_device *netdev, const u8 *buf,
7575                          size_t len, gfp_t gfp)
7576 {
7577         nl80211_send_mlme_event(rdev, netdev, buf, len,
7578                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7579 }
7580
7581 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7582                            struct net_device *netdev, const u8 *buf,
7583                            size_t len, gfp_t gfp)
7584 {
7585         nl80211_send_mlme_event(rdev, netdev, buf, len,
7586                                 NL80211_CMD_DISASSOCIATE, gfp);
7587 }
7588
7589 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7590                                 struct net_device *netdev, const u8 *buf,
7591                                 size_t len, gfp_t gfp)
7592 {
7593         nl80211_send_mlme_event(rdev, netdev, buf, len,
7594                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7595 }
7596
7597 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7598                                   struct net_device *netdev, const u8 *buf,
7599                                   size_t len, gfp_t gfp)
7600 {
7601         nl80211_send_mlme_event(rdev, netdev, buf, len,
7602                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7603 }
7604
7605 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7606                                       struct net_device *netdev, int cmd,
7607                                       const u8 *addr, gfp_t gfp)
7608 {
7609         struct sk_buff *msg;
7610         void *hdr;
7611
7612         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7613         if (!msg)
7614                 return;
7615
7616         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7617         if (!hdr) {
7618                 nlmsg_free(msg);
7619                 return;
7620         }
7621
7622         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7623             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7624             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7625             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7626                 goto nla_put_failure;
7627
7628         genlmsg_end(msg, hdr);
7629
7630         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7631                                 nl80211_mlme_mcgrp.id, gfp);
7632         return;
7633
7634  nla_put_failure:
7635         genlmsg_cancel(msg, hdr);
7636         nlmsg_free(msg);
7637 }
7638
7639 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7640                                struct net_device *netdev, const u8 *addr,
7641                                gfp_t gfp)
7642 {
7643         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7644                                   addr, gfp);
7645 }
7646
7647 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7648                                 struct net_device *netdev, const u8 *addr,
7649                                 gfp_t gfp)
7650 {
7651         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7652                                   addr, gfp);
7653 }
7654
7655 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7656                                  struct net_device *netdev, const u8 *bssid,
7657                                  const u8 *req_ie, size_t req_ie_len,
7658                                  const u8 *resp_ie, size_t resp_ie_len,
7659                                  u16 status, gfp_t gfp)
7660 {
7661         struct sk_buff *msg;
7662         void *hdr;
7663
7664         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7665         if (!msg)
7666                 return;
7667
7668         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7669         if (!hdr) {
7670                 nlmsg_free(msg);
7671                 return;
7672         }
7673
7674         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7675             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7676             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7677             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7678             (req_ie &&
7679              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7680             (resp_ie &&
7681              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7682                 goto nla_put_failure;
7683
7684         genlmsg_end(msg, hdr);
7685
7686         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7687                                 nl80211_mlme_mcgrp.id, gfp);
7688         return;
7689
7690  nla_put_failure:
7691         genlmsg_cancel(msg, hdr);
7692         nlmsg_free(msg);
7693
7694 }
7695
7696 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7697                          struct net_device *netdev, const u8 *bssid,
7698                          const u8 *req_ie, size_t req_ie_len,
7699                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7700 {
7701         struct sk_buff *msg;
7702         void *hdr;
7703
7704         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7705         if (!msg)
7706                 return;
7707
7708         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7709         if (!hdr) {
7710                 nlmsg_free(msg);
7711                 return;
7712         }
7713
7714         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7715             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7716             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7717             (req_ie &&
7718              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7719             (resp_ie &&
7720              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7721                 goto nla_put_failure;
7722
7723         genlmsg_end(msg, hdr);
7724
7725         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7726                                 nl80211_mlme_mcgrp.id, gfp);
7727         return;
7728
7729  nla_put_failure:
7730         genlmsg_cancel(msg, hdr);
7731         nlmsg_free(msg);
7732
7733 }
7734
7735 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7736                                struct net_device *netdev, u16 reason,
7737                                const u8 *ie, size_t ie_len, bool from_ap)
7738 {
7739         struct sk_buff *msg;
7740         void *hdr;
7741
7742         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7743         if (!msg)
7744                 return;
7745
7746         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7747         if (!hdr) {
7748                 nlmsg_free(msg);
7749                 return;
7750         }
7751
7752         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7753             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7754             (from_ap && reason &&
7755              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7756             (from_ap &&
7757              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7758             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7759                 goto nla_put_failure;
7760
7761         genlmsg_end(msg, hdr);
7762
7763         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7764                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7765         return;
7766
7767  nla_put_failure:
7768         genlmsg_cancel(msg, hdr);
7769         nlmsg_free(msg);
7770
7771 }
7772
7773 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7774                              struct net_device *netdev, const u8 *bssid,
7775                              gfp_t gfp)
7776 {
7777         struct sk_buff *msg;
7778         void *hdr;
7779
7780         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7781         if (!msg)
7782                 return;
7783
7784         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7785         if (!hdr) {
7786                 nlmsg_free(msg);
7787                 return;
7788         }
7789
7790         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7791             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7792             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7793                 goto nla_put_failure;
7794
7795         genlmsg_end(msg, hdr);
7796
7797         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7798                                 nl80211_mlme_mcgrp.id, gfp);
7799         return;
7800
7801  nla_put_failure:
7802         genlmsg_cancel(msg, hdr);
7803         nlmsg_free(msg);
7804 }
7805
7806 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7807                 struct net_device *netdev,
7808                 const u8 *macaddr, const u8* ie, u8 ie_len,
7809                 gfp_t gfp)
7810 {
7811         struct sk_buff *msg;
7812         void *hdr;
7813
7814         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7815         if (!msg)
7816                 return;
7817
7818         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7819         if (!hdr) {
7820                 nlmsg_free(msg);
7821                 return;
7822         }
7823
7824         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7825             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7826             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7827             (ie_len && ie &&
7828              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7829                 goto nla_put_failure;
7830
7831         genlmsg_end(msg, hdr);
7832
7833         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7834                                 nl80211_mlme_mcgrp.id, gfp);
7835         return;
7836
7837  nla_put_failure:
7838         genlmsg_cancel(msg, hdr);
7839         nlmsg_free(msg);
7840 }
7841
7842 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7843                                  struct net_device *netdev, const u8 *addr,
7844                                  enum nl80211_key_type key_type, int key_id,
7845                                  const u8 *tsc, gfp_t gfp)
7846 {
7847         struct sk_buff *msg;
7848         void *hdr;
7849
7850         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7851         if (!msg)
7852                 return;
7853
7854         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7855         if (!hdr) {
7856                 nlmsg_free(msg);
7857                 return;
7858         }
7859
7860         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7861             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7862             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7863             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7864             (key_id != -1 &&
7865              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7866             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7867                 goto nla_put_failure;
7868
7869         genlmsg_end(msg, hdr);
7870
7871         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7872                                 nl80211_mlme_mcgrp.id, gfp);
7873         return;
7874
7875  nla_put_failure:
7876         genlmsg_cancel(msg, hdr);
7877         nlmsg_free(msg);
7878 }
7879
7880 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7881                                     struct ieee80211_channel *channel_before,
7882                                     struct ieee80211_channel *channel_after)
7883 {
7884         struct sk_buff *msg;
7885         void *hdr;
7886         struct nlattr *nl_freq;
7887
7888         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7889         if (!msg)
7890                 return;
7891
7892         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7893         if (!hdr) {
7894                 nlmsg_free(msg);
7895                 return;
7896         }
7897
7898         /*
7899          * Since we are applying the beacon hint to a wiphy we know its
7900          * wiphy_idx is valid
7901          */
7902         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
7903                 goto nla_put_failure;
7904
7905         /* Before */
7906         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
7907         if (!nl_freq)
7908                 goto nla_put_failure;
7909         if (nl80211_msg_put_channel(msg, channel_before))
7910                 goto nla_put_failure;
7911         nla_nest_end(msg, nl_freq);
7912
7913         /* After */
7914         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
7915         if (!nl_freq)
7916                 goto nla_put_failure;
7917         if (nl80211_msg_put_channel(msg, channel_after))
7918                 goto nla_put_failure;
7919         nla_nest_end(msg, nl_freq);
7920
7921         genlmsg_end(msg, hdr);
7922
7923         rcu_read_lock();
7924         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7925                                 GFP_ATOMIC);
7926         rcu_read_unlock();
7927
7928         return;
7929
7930 nla_put_failure:
7931         genlmsg_cancel(msg, hdr);
7932         nlmsg_free(msg);
7933 }
7934
7935 static void nl80211_send_remain_on_chan_event(
7936         int cmd, struct cfg80211_registered_device *rdev,
7937         struct net_device *netdev, u64 cookie,
7938         struct ieee80211_channel *chan,
7939         enum nl80211_channel_type channel_type,
7940         unsigned int duration, gfp_t gfp)
7941 {
7942         struct sk_buff *msg;
7943         void *hdr;
7944
7945         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7946         if (!msg)
7947                 return;
7948
7949         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7950         if (!hdr) {
7951                 nlmsg_free(msg);
7952                 return;
7953         }
7954
7955         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7956             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7957             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
7958             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
7959             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7960                 goto nla_put_failure;
7961
7962         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
7963             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
7964                 goto nla_put_failure;
7965
7966         genlmsg_end(msg, hdr);
7967
7968         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7969                                 nl80211_mlme_mcgrp.id, gfp);
7970         return;
7971
7972  nla_put_failure:
7973         genlmsg_cancel(msg, hdr);
7974         nlmsg_free(msg);
7975 }
7976
7977 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
7978                                     struct net_device *netdev, u64 cookie,
7979                                     struct ieee80211_channel *chan,
7980                                     enum nl80211_channel_type channel_type,
7981                                     unsigned int duration, gfp_t gfp)
7982 {
7983         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
7984                                           rdev, netdev, cookie, chan,
7985                                           channel_type, duration, gfp);
7986 }
7987
7988 void nl80211_send_remain_on_channel_cancel(
7989         struct cfg80211_registered_device *rdev, struct net_device *netdev,
7990         u64 cookie, struct ieee80211_channel *chan,
7991         enum nl80211_channel_type channel_type, gfp_t gfp)
7992 {
7993         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7994                                           rdev, netdev, cookie, chan,
7995                                           channel_type, 0, gfp);
7996 }
7997
7998 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
7999                             struct net_device *dev, const u8 *mac_addr,
8000                             struct station_info *sinfo, gfp_t gfp)
8001 {
8002         struct sk_buff *msg;
8003
8004         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8005         if (!msg)
8006                 return;
8007
8008         if (nl80211_send_station(msg, 0, 0, 0,
8009                                  rdev, dev, mac_addr, sinfo) < 0) {
8010                 nlmsg_free(msg);
8011                 return;
8012         }
8013
8014         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8015                                 nl80211_mlme_mcgrp.id, gfp);
8016 }
8017
8018 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8019                                 struct net_device *dev, const u8 *mac_addr,
8020                                 gfp_t gfp)
8021 {
8022         struct sk_buff *msg;
8023         void *hdr;
8024
8025         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8026         if (!msg)
8027                 return;
8028
8029         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8030         if (!hdr) {
8031                 nlmsg_free(msg);
8032                 return;
8033         }
8034
8035         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8036             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8037                 goto nla_put_failure;
8038
8039         genlmsg_end(msg, hdr);
8040
8041         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8042                                 nl80211_mlme_mcgrp.id, gfp);
8043         return;
8044
8045  nla_put_failure:
8046         genlmsg_cancel(msg, hdr);
8047         nlmsg_free(msg);
8048 }
8049
8050 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8051                                        const u8 *addr, gfp_t gfp)
8052 {
8053         struct wireless_dev *wdev = dev->ieee80211_ptr;
8054         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8055         struct sk_buff *msg;
8056         void *hdr;
8057         int err;
8058         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8059
8060         if (!nlpid)
8061                 return false;
8062
8063         msg = nlmsg_new(100, gfp);
8064         if (!msg)
8065                 return true;
8066
8067         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8068         if (!hdr) {
8069                 nlmsg_free(msg);
8070                 return true;
8071         }
8072
8073         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8074             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8075             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8076                 goto nla_put_failure;
8077
8078         err = genlmsg_end(msg, hdr);
8079         if (err < 0) {
8080                 nlmsg_free(msg);
8081                 return true;
8082         }
8083
8084         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8085         return true;
8086
8087  nla_put_failure:
8088         genlmsg_cancel(msg, hdr);
8089         nlmsg_free(msg);
8090         return true;
8091 }
8092
8093 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8094 {
8095         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8096                                           addr, gfp);
8097 }
8098
8099 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8100                                     const u8 *addr, gfp_t gfp)
8101 {
8102         return __nl80211_unexpected_frame(dev,
8103                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8104                                           addr, gfp);
8105 }
8106
8107 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8108                       struct net_device *netdev, u32 nlpid,
8109                       int freq, int sig_dbm,
8110                       const u8 *buf, size_t len, gfp_t gfp)
8111 {
8112         struct sk_buff *msg;
8113         void *hdr;
8114
8115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8116         if (!msg)
8117                 return -ENOMEM;
8118
8119         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8120         if (!hdr) {
8121                 nlmsg_free(msg);
8122                 return -ENOMEM;
8123         }
8124
8125         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8126             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8127             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8128             (sig_dbm &&
8129              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8130             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8131                 goto nla_put_failure;
8132
8133         genlmsg_end(msg, hdr);
8134
8135         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8136
8137  nla_put_failure:
8138         genlmsg_cancel(msg, hdr);
8139         nlmsg_free(msg);
8140         return -ENOBUFS;
8141 }
8142
8143 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8144                                  struct net_device *netdev, u64 cookie,
8145                                  const u8 *buf, size_t len, bool ack,
8146                                  gfp_t gfp)
8147 {
8148         struct sk_buff *msg;
8149         void *hdr;
8150
8151         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8152         if (!msg)
8153                 return;
8154
8155         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8156         if (!hdr) {
8157                 nlmsg_free(msg);
8158                 return;
8159         }
8160
8161         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8162             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8163             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8164             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8165             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8166                 goto nla_put_failure;
8167
8168         genlmsg_end(msg, hdr);
8169
8170         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8171         return;
8172
8173  nla_put_failure:
8174         genlmsg_cancel(msg, hdr);
8175         nlmsg_free(msg);
8176 }
8177
8178 void
8179 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8180                              struct net_device *netdev,
8181                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8182                              gfp_t gfp)
8183 {
8184         struct sk_buff *msg;
8185         struct nlattr *pinfoattr;
8186         void *hdr;
8187
8188         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8189         if (!msg)
8190                 return;
8191
8192         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8193         if (!hdr) {
8194                 nlmsg_free(msg);
8195                 return;
8196         }
8197
8198         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8199             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8200                 goto nla_put_failure;
8201
8202         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8203         if (!pinfoattr)
8204                 goto nla_put_failure;
8205
8206         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8207                         rssi_event))
8208                 goto nla_put_failure;
8209
8210         nla_nest_end(msg, pinfoattr);
8211
8212         genlmsg_end(msg, hdr);
8213
8214         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8215                                 nl80211_mlme_mcgrp.id, gfp);
8216         return;
8217
8218  nla_put_failure:
8219         genlmsg_cancel(msg, hdr);
8220         nlmsg_free(msg);
8221 }
8222
8223 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8224                               struct net_device *netdev, const u8 *bssid,
8225                               const u8 *replay_ctr, gfp_t gfp)
8226 {
8227         struct sk_buff *msg;
8228         struct nlattr *rekey_attr;
8229         void *hdr;
8230
8231         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8232         if (!msg)
8233                 return;
8234
8235         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8236         if (!hdr) {
8237                 nlmsg_free(msg);
8238                 return;
8239         }
8240
8241         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8242             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8243             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8244                 goto nla_put_failure;
8245
8246         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8247         if (!rekey_attr)
8248                 goto nla_put_failure;
8249
8250         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8251                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8252                 goto nla_put_failure;
8253
8254         nla_nest_end(msg, rekey_attr);
8255
8256         genlmsg_end(msg, hdr);
8257
8258         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8259                                 nl80211_mlme_mcgrp.id, gfp);
8260         return;
8261
8262  nla_put_failure:
8263         genlmsg_cancel(msg, hdr);
8264         nlmsg_free(msg);
8265 }
8266
8267 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8268                                     struct net_device *netdev, int index,
8269                                     const u8 *bssid, bool preauth, gfp_t gfp)
8270 {
8271         struct sk_buff *msg;
8272         struct nlattr *attr;
8273         void *hdr;
8274
8275         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8276         if (!msg)
8277                 return;
8278
8279         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8280         if (!hdr) {
8281                 nlmsg_free(msg);
8282                 return;
8283         }
8284
8285         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8286             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8287                 goto nla_put_failure;
8288
8289         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8290         if (!attr)
8291                 goto nla_put_failure;
8292
8293         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8294             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8295             (preauth &&
8296              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8297                 goto nla_put_failure;
8298
8299         nla_nest_end(msg, attr);
8300
8301         genlmsg_end(msg, hdr);
8302
8303         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8304                                 nl80211_mlme_mcgrp.id, gfp);
8305         return;
8306
8307  nla_put_failure:
8308         genlmsg_cancel(msg, hdr);
8309         nlmsg_free(msg);
8310 }
8311
8312 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8313                               struct net_device *netdev, int freq,
8314                               enum nl80211_channel_type type, gfp_t gfp)
8315 {
8316         struct sk_buff *msg;
8317         void *hdr;
8318
8319         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8320         if (!msg)
8321                 return;
8322
8323         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8324         if (!hdr) {
8325                 nlmsg_free(msg);
8326                 return;
8327         }
8328
8329         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8330             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8331             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8332                 goto nla_put_failure;
8333
8334         genlmsg_end(msg, hdr);
8335
8336         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8337                                 nl80211_mlme_mcgrp.id, gfp);
8338         return;
8339
8340  nla_put_failure:
8341         genlmsg_cancel(msg, hdr);
8342         nlmsg_free(msg);
8343 }
8344
8345 void
8346 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8347                                 struct net_device *netdev, const u8 *peer,
8348                                 u32 num_packets, gfp_t gfp)
8349 {
8350         struct sk_buff *msg;
8351         struct nlattr *pinfoattr;
8352         void *hdr;
8353
8354         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8355         if (!msg)
8356                 return;
8357
8358         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8359         if (!hdr) {
8360                 nlmsg_free(msg);
8361                 return;
8362         }
8363
8364         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8365             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8366             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8367                 goto nla_put_failure;
8368
8369         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8370         if (!pinfoattr)
8371                 goto nla_put_failure;
8372
8373         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8374                 goto nla_put_failure;
8375
8376         nla_nest_end(msg, pinfoattr);
8377
8378         genlmsg_end(msg, hdr);
8379
8380         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8381                                 nl80211_mlme_mcgrp.id, gfp);
8382         return;
8383
8384  nla_put_failure:
8385         genlmsg_cancel(msg, hdr);
8386         nlmsg_free(msg);
8387 }
8388
8389 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8390                            u64 cookie, bool acked, gfp_t gfp)
8391 {
8392         struct wireless_dev *wdev = dev->ieee80211_ptr;
8393         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8394         struct sk_buff *msg;
8395         void *hdr;
8396         int err;
8397
8398         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8399         if (!msg)
8400                 return;
8401
8402         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8403         if (!hdr) {
8404                 nlmsg_free(msg);
8405                 return;
8406         }
8407
8408         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8409             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8410             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8411             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8412             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8413                 goto nla_put_failure;
8414
8415         err = genlmsg_end(msg, hdr);
8416         if (err < 0) {
8417                 nlmsg_free(msg);
8418                 return;
8419         }
8420
8421         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8422                                 nl80211_mlme_mcgrp.id, gfp);
8423         return;
8424
8425  nla_put_failure:
8426         genlmsg_cancel(msg, hdr);
8427         nlmsg_free(msg);
8428 }
8429 EXPORT_SYMBOL(cfg80211_probe_status);
8430
8431 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8432                                  const u8 *frame, size_t len,
8433                                  int freq, int sig_dbm, gfp_t gfp)
8434 {
8435         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8436         struct sk_buff *msg;
8437         void *hdr;
8438         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8439
8440         if (!nlpid)
8441                 return;
8442
8443         msg = nlmsg_new(len + 100, gfp);
8444         if (!msg)
8445                 return;
8446
8447         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8448         if (!hdr) {
8449                 nlmsg_free(msg);
8450                 return;
8451         }
8452
8453         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8454             (freq &&
8455              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8456             (sig_dbm &&
8457              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8458             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8459                 goto nla_put_failure;
8460
8461         genlmsg_end(msg, hdr);
8462
8463         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8464         return;
8465
8466  nla_put_failure:
8467         genlmsg_cancel(msg, hdr);
8468         nlmsg_free(msg);
8469 }
8470 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8471
8472 static int nl80211_netlink_notify(struct notifier_block * nb,
8473                                   unsigned long state,
8474                                   void *_notify)
8475 {
8476         struct netlink_notify *notify = _notify;
8477         struct cfg80211_registered_device *rdev;
8478         struct wireless_dev *wdev;
8479
8480         if (state != NETLINK_URELEASE)
8481                 return NOTIFY_DONE;
8482
8483         rcu_read_lock();
8484
8485         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8486                 list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
8487                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8488                 if (rdev->ap_beacons_nlpid == notify->pid)
8489                         rdev->ap_beacons_nlpid = 0;
8490         }
8491
8492         rcu_read_unlock();
8493
8494         return NOTIFY_DONE;
8495 }
8496
8497 static struct notifier_block nl80211_netlink_notifier = {
8498         .notifier_call = nl80211_netlink_notify,
8499 };
8500
8501 /* initialisation/exit functions */
8502
8503 int nl80211_init(void)
8504 {
8505         int err;
8506
8507         err = genl_register_family_with_ops(&nl80211_fam,
8508                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8509         if (err)
8510                 return err;
8511
8512         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8513         if (err)
8514                 goto err_out;
8515
8516         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8517         if (err)
8518                 goto err_out;
8519
8520         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8521         if (err)
8522                 goto err_out;
8523
8524         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8525         if (err)
8526                 goto err_out;
8527
8528 #ifdef CONFIG_NL80211_TESTMODE
8529         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8530         if (err)
8531                 goto err_out;
8532 #endif
8533
8534         err = netlink_register_notifier(&nl80211_netlink_notifier);
8535         if (err)
8536                 goto err_out;
8537
8538         return 0;
8539  err_out:
8540         genl_unregister_family(&nl80211_fam);
8541         return err;
8542 }
8543
8544 void nl80211_exit(void)
8545 {
8546         netlink_unregister_notifier(&nl80211_netlink_notifier);
8547         genl_unregister_family(&nl80211_fam);
8548 }