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 /* returns ERR_PTR values */
  50 static struct wireless_dev *
  51 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs)
  52 {
  53         struct cfg80211_registered_device *rdev;
  54         struct wireless_dev *result = NULL;
  55         bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
  56         bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
  57         u64 wdev_id;
  58         int wiphy_idx = -1;
  59         int ifidx = -1;
  60
  61         assert_cfg80211_lock();
  62
  63         if (!have_ifidx && !have_wdev_id)
  64                 return ERR_PTR(-EINVAL);
  65
  66         if (have_ifidx)
  67                 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  68         if (have_wdev_id) {
  69                 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
  70                 wiphy_idx = wdev_id >> 32;
  71         }
  72
  73         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  74                 struct wireless_dev *wdev;
  75
  76                 if (wiphy_net(&rdev->wiphy) != netns)
  77                         continue;
  78
  79                 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
  80                         continue;
  81
  82                 mutex_lock(&rdev->devlist_mtx);
  83                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
  84                         if (have_ifidx && wdev->netdev &&
  85                             wdev->netdev->ifindex == ifidx) {
  86                                 result = wdev;
  87                                 break;
  88                         }
  89                         if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
  90                                 result = wdev;
  91                                 break;
  92                         }
  93                 }
  94                 mutex_unlock(&rdev->devlist_mtx);
  95
  96                 if (result)
  97                         break;
  98         }
  99
 100         if (result)
 101                 return result;
 102         return ERR_PTR(-ENODEV);
 103 }
 104
 105 static struct cfg80211_registered_device *
 106 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
 107 {
 108         struct cfg80211_registered_device *rdev = NULL, *tmp;
 109         struct net_device *netdev;
 110
 111         assert_cfg80211_lock();
 112
 113         if (!attrs[NL80211_ATTR_WIPHY] &&
 114             !attrs[NL80211_ATTR_IFINDEX] &&
 115             !attrs[NL80211_ATTR_WDEV])
 116                 return ERR_PTR(-EINVAL);
 117
 118         if (attrs[NL80211_ATTR_WIPHY])
 119                 rdev = cfg80211_rdev_by_wiphy_idx(
 120                                 nla_get_u32(attrs[NL80211_ATTR_WIPHY]));
 121
 122         if (attrs[NL80211_ATTR_WDEV]) {
 123                 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
 124                 struct wireless_dev *wdev;
 125                 bool found = false;
 126
 127                 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
 128                 if (tmp) {
 129                         /* make sure wdev exists */
 130                         mutex_lock(&tmp->devlist_mtx);
 131                         list_for_each_entry(wdev, &tmp->wdev_list, list) {
 132                                 if (wdev->identifier != (u32)wdev_id)
 133                                         continue;
 134                                 found = true;
 135                                 break;
 136                         }
 137                         mutex_unlock(&tmp->devlist_mtx);
 138
 139                         if (!found)
 140                                 tmp = NULL;
 141
 142                         if (rdev && tmp != rdev)
 143                                 return ERR_PTR(-EINVAL);
 144                         rdev = tmp;
 145                 }
 146         }
 147
 148         if (attrs[NL80211_ATTR_IFINDEX]) {
 149                 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
 150                 netdev = dev_get_by_index(netns, ifindex);
 151                 if (netdev) {
 152                         if (netdev->ieee80211_ptr)
 153                                 tmp = wiphy_to_dev(
 154                                                 netdev->ieee80211_ptr->wiphy);
 155                         else
 156                                 tmp = NULL;
 157
 158                         dev_put(netdev);
 159
 160                         /* not wireless device -- return error */
 161                         if (!tmp)
 162                                 return ERR_PTR(-EINVAL);
 163
 164                         /* mismatch -- return error */
 165                         if (rdev && tmp != rdev)
 166                                 return ERR_PTR(-EINVAL);
 167
 168                         rdev = tmp;
 169                 }
 170         }
 171
 172         if (!rdev)
 173                 return ERR_PTR(-ENODEV);
 174
 175         if (netns != wiphy_net(&rdev->wiphy))
 176                 return ERR_PTR(-ENODEV);
 177
 178         return rdev;
 179 }
 180
 181 /*
 182  * This function returns a pointer to the driver
 183  * that the genl_info item that is passed refers to.
 184  * If successful, it returns non-NULL and also locks
 185  * the driver's mutex!
 186  *
 187  * This means that you need to call cfg80211_unlock_rdev()
 188  * before being allowed to acquire &cfg80211_mutex!
 189  *
 190  * This is necessary because we need to lock the global
 191  * mutex to get an item off the list safely, and then
 192  * we lock the rdev mutex so it doesn't go away under us.
 193  *
 194  * We don't want to keep cfg80211_mutex locked
 195  * for all the time in order to allow requests on
 196  * other interfaces to go through at the same time.
 197  *
 198  * The result of this can be a PTR_ERR and hence must
 199  * be checked with IS_ERR() for errors.
 200  */
 201 static struct cfg80211_registered_device *
 202 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
 203 {
 204         struct cfg80211_registered_device *rdev;
 205
 206         mutex_lock(&cfg80211_mutex);
 207         rdev = __cfg80211_rdev_from_attrs(netns, info->attrs);
 208
 209         /* if it is not an error we grab the lock on
 210          * it to assure it won't be going away while
 211          * we operate on it */
 212         if (!IS_ERR(rdev))
 213                 mutex_lock(&rdev->mtx);
 214
 215         mutex_unlock(&cfg80211_mutex);
 216
 217         return rdev;
 218 }
 219
 220 /* policy for the attributes */
 221 static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
 222         [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
 223         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 224                                       .len = 20-1 },
 225         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 226         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 227         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 229         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 230         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 231         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 232         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 233
 234         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 235         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 236         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 237
 238         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 239         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 240
 241         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 242         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 243                                     .len = WLAN_MAX_KEY_LEN },
 244         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 245         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 246         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 247         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 248         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 249
 250         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 251         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 252         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 253                                        .len = IEEE80211_MAX_DATA_LEN },
 254         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 255                                        .len = IEEE80211_MAX_DATA_LEN },
 256         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 257         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 258         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 259         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 260                                                .len = NL80211_MAX_SUPP_RATES },
 261         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 262         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 263         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 264         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 265                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 266         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 267
 268         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 269         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 270
 271         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 272         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 273         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 274         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 275                                            .len = NL80211_MAX_SUPP_RATES },
 276         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 277
 278         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 279         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 280
 281         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 282
 283         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 284         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 285                               .len = IEEE80211_MAX_DATA_LEN },
 286         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 287         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 288
 289         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 290                                 .len = IEEE80211_MAX_SSID_LEN },
 291         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 292         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 293         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 294         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 295         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 296         [NL80211_ATTR_STA_FLAGS2] = {
 297                 .len = sizeof(struct nl80211_sta_flag_update),
 298         },
 299         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 301         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 302         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 303         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 304         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 305         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 306         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 307         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 308                                  .len = WLAN_PMKID_LEN },
 309         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 310         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 311         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 312         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 313                                  .len = IEEE80211_MAX_DATA_LEN },
 314         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 315         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 316         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 317         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 318         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 319         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 320         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 321         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 322         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 323         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 324         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 325         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 326         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 327         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 328         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 329         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 330         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 331         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 332         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 333         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 334                                          .len = IEEE80211_MAX_DATA_LEN },
 335         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 336                                          .len = IEEE80211_MAX_DATA_LEN },
 337         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 338         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 339         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 340         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 341         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 342         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 343         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 344         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 346         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 347                                       .len = IEEE80211_MAX_DATA_LEN },
 348         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 349         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 351                 .len = NL80211_HT_CAPABILITY_LEN
 352         },
 353         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 354         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 355         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 356         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 357 };
 358
 359 /* policy for the key attributes */
 360 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 361         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 362         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 363         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 364         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 365         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 366         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 367         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 368         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 369 };
 370
 371 /* policy for the key default flags */
 372 static const struct nla_policy
 373 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 374         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 375         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 376 };
 377
 378 /* policy for WoWLAN attributes */
 379 static const struct nla_policy
 380 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 381         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 382         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 383         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 384         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 385         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 386         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 387         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 388         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 389 };
 390
 391 /* policy for GTK rekey offload attributes */
 392 static const struct nla_policy
 393 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 394         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 395         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 396         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 397 };
 398
 399 static const struct nla_policy
 400 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 401         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 402                                                  .len = IEEE80211_MAX_SSID_LEN },
 403         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 404 };
 405
 406 /* ifidx get helper */
 407 static int nl80211_get_ifidx(struct netlink_callback *cb)
 408 {
 409         int res;
 410
 411         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 412                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 413                           nl80211_policy);
 414         if (res)
 415                 return res;
 416
 417         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 418                 return -EINVAL;
 419
 420         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 421         if (!res)
 422                 return -EINVAL;
 423         return res;
 424 }
 425
 426 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 427                                        struct netlink_callback *cb,
 428                                        struct cfg80211_registered_device **rdev,
 429                                        struct net_device **dev)
 430 {
 431         int ifidx = cb->args[0];
 432         int err;
 433
 434         if (!ifidx)
 435                 ifidx = nl80211_get_ifidx(cb);
 436         if (ifidx < 0)
 437                 return ifidx;
 438
 439         cb->args[0] = ifidx;
 440
 441         rtnl_lock();
 442
 443         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 444         if (!*dev) {
 445                 err = -ENODEV;
 446                 goto out_rtnl;
 447         }
 448
 449         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 450         if (IS_ERR(*rdev)) {
 451                 err = PTR_ERR(*rdev);
 452                 goto out_rtnl;
 453         }
 454
 455         return 0;
 456  out_rtnl:
 457         rtnl_unlock();
 458         return err;
 459 }
 460
 461 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 462 {
 463         cfg80211_unlock_rdev(rdev);
 464         rtnl_unlock();
 465 }
 466
 467 /* IE validation */
 468 static bool is_valid_ie_attr(const struct nlattr *attr)
 469 {
 470         const u8 *pos;
 471         int len;
 472
 473         if (!attr)
 474                 return true;
 475
 476         pos = nla_data(attr);
 477         len = nla_len(attr);
 478
 479         while (len) {
 480                 u8 elemlen;
 481
 482                 if (len < 2)
 483                         return false;
 484                 len -= 2;
 485
 486                 elemlen = pos[1];
 487                 if (elemlen > len)
 488                         return false;
 489
 490                 len -= elemlen;
 491                 pos += 2 + elemlen;
 492         }
 493
 494         return true;
 495 }
 496
 497 /* message building helper */
 498 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
 499                                    int flags, u8 cmd)
 500 {
 501         /* since there is no private header just add the generic one */
 502         return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
 503 }
 504
 505 static int nl80211_msg_put_channel(struct sk_buff *msg,
 506                                    struct ieee80211_channel *chan)
 507 {
 508         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 509                         chan->center_freq))
 510                 goto nla_put_failure;
 511
 512         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 513             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 514                 goto nla_put_failure;
 515         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 516             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 517                 goto nla_put_failure;
 518         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 519             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 520                 goto nla_put_failure;
 521         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 522             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 523                 goto nla_put_failure;
 524
 525         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 526                         DBM_TO_MBM(chan->max_power)))
 527                 goto nla_put_failure;
 528
 529         return 0;
 530
 531  nla_put_failure:
 532         return -ENOBUFS;
 533 }
 534
 535 /* netlink command implementations */
 536
 537 struct key_parse {
 538         struct key_params p;
 539         int idx;
 540         int type;
 541         bool def, defmgmt;
 542         bool def_uni, def_multi;
 543 };
 544
 545 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 546 {
 547         struct nlattr *tb[NL80211_KEY_MAX + 1];
 548         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 549                                    nl80211_key_policy);
 550         if (err)
 551                 return err;
 552
 553         k->def = !!tb[NL80211_KEY_DEFAULT];
 554         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 555
 556         if (k->def) {
 557                 k->def_uni = true;
 558                 k->def_multi = true;
 559         }
 560         if (k->defmgmt)
 561                 k->def_multi = true;
 562
 563         if (tb[NL80211_KEY_IDX])
 564                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 565
 566         if (tb[NL80211_KEY_DATA]) {
 567                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 568                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 569         }
 570
 571         if (tb[NL80211_KEY_SEQ]) {
 572                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 573                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 574         }
 575
 576         if (tb[NL80211_KEY_CIPHER])
 577                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 578
 579         if (tb[NL80211_KEY_TYPE]) {
 580                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 581                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 582                         return -EINVAL;
 583         }
 584
 585         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 586                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 587                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 588                                        tb[NL80211_KEY_DEFAULT_TYPES],
 589                                        nl80211_key_default_policy);
 590                 if (err)
 591                         return err;
 592
 593                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 594                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 595         }
 596
 597         return 0;
 598 }
 599
 600 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 601 {
 602         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 603                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 604                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 605         }
 606
 607         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 608                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 609                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 610         }
 611
 612         if (info->attrs[NL80211_ATTR_KEY_IDX])
 613                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 614
 615         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 616                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 617
 618         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 619         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 620
 621         if (k->def) {
 622                 k->def_uni = true;
 623                 k->def_multi = true;
 624         }
 625         if (k->defmgmt)
 626                 k->def_multi = true;
 627
 628         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 629                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 630                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 631                         return -EINVAL;
 632         }
 633
 634         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 635                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 636                 int err = nla_parse_nested(
 637                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 638                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 639                                 nl80211_key_default_policy);
 640                 if (err)
 641                         return err;
 642
 643                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 644                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 645         }
 646
 647         return 0;
 648 }
 649
 650 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 651 {
 652         int err;
 653
 654         memset(k, 0, sizeof(*k));
 655         k->idx = -1;
 656         k->type = -1;
 657
 658         if (info->attrs[NL80211_ATTR_KEY])
 659                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 660         else
 661                 err = nl80211_parse_key_old(info, k);
 662
 663         if (err)
 664                 return err;
 665
 666         if (k->def && k->defmgmt)
 667                 return -EINVAL;
 668
 669         if (k->defmgmt) {
 670                 if (k->def_uni || !k->def_multi)
 671                         return -EINVAL;
 672         }
 673
 674         if (k->idx != -1) {
 675                 if (k->defmgmt) {
 676                         if (k->idx < 4 || k->idx > 5)
 677                                 return -EINVAL;
 678                 } else if (k->def) {
 679                         if (k->idx < 0 || k->idx > 3)
 680                                 return -EINVAL;
 681                 } else {
 682                         if (k->idx < 0 || k->idx > 5)
 683                                 return -EINVAL;
 684                 }
 685         }
 686
 687         return 0;
 688 }
 689
 690 static struct cfg80211_cached_keys *
 691 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 692                        struct nlattr *keys)
 693 {
 694         struct key_parse parse;
 695         struct nlattr *key;
 696         struct cfg80211_cached_keys *result;
 697         int rem, err, def = 0;
 698
 699         result = kzalloc(sizeof(*result), GFP_KERNEL);
 700         if (!result)
 701                 return ERR_PTR(-ENOMEM);
 702
 703         result->def = -1;
 704         result->defmgmt = -1;
 705
 706         nla_for_each_nested(key, keys, rem) {
 707                 memset(&parse, 0, sizeof(parse));
 708                 parse.idx = -1;
 709
 710                 err = nl80211_parse_key_new(key, &parse);
 711                 if (err)
 712                         goto error;
 713                 err = -EINVAL;
 714                 if (!parse.p.key)
 715                         goto error;
 716                 if (parse.idx < 0 || parse.idx > 4)
 717                         goto error;
 718                 if (parse.def) {
 719                         if (def)
 720                                 goto error;
 721                         def = 1;
 722                         result->def = parse.idx;
 723                         if (!parse.def_uni || !parse.def_multi)
 724                                 goto error;
 725                 } else if (parse.defmgmt)
 726                         goto error;
 727                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 728                                                      parse.idx, false, NULL);
 729                 if (err)
 730                         goto error;
 731                 result->params[parse.idx].cipher = parse.p.cipher;
 732                 result->params[parse.idx].key_len = parse.p.key_len;
 733                 result->params[parse.idx].key = result->data[parse.idx];
 734                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 735         }
 736
 737         return result;
 738  error:
 739         kfree(result);
 740         return ERR_PTR(err);
 741 }
 742
 743 static int nl80211_key_allowed(struct wireless_dev *wdev)
 744 {
 745         ASSERT_WDEV_LOCK(wdev);
 746
 747         switch (wdev->iftype) {
 748         case NL80211_IFTYPE_AP:
 749         case NL80211_IFTYPE_AP_VLAN:
 750         case NL80211_IFTYPE_P2P_GO:
 751         case NL80211_IFTYPE_MESH_POINT:
 752                 break;
 753         case NL80211_IFTYPE_ADHOC:
 754                 if (!wdev->current_bss)
 755                         return -ENOLINK;
 756                 break;
 757         case NL80211_IFTYPE_STATION:
 758         case NL80211_IFTYPE_P2P_CLIENT:
 759                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 760                         return -ENOLINK;
 761                 break;
 762         default:
 763                 return -EINVAL;
 764         }
 765
 766         return 0;
 767 }
 768
 769 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 770 {
 771         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 772         int i;
 773
 774         if (!nl_modes)
 775                 goto nla_put_failure;
 776
 777         i = 0;
 778         while (ifmodes) {
 779                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 780                         goto nla_put_failure;
 781                 ifmodes >>= 1;
 782                 i++;
 783         }
 784
 785         nla_nest_end(msg, nl_modes);
 786         return 0;
 787
 788 nla_put_failure:
 789         return -ENOBUFS;
 790 }
 791
 792 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 793                                           struct sk_buff *msg)
 794 {
 795         struct nlattr *nl_combis;
 796         int i, j;
 797
 798         nl_combis = nla_nest_start(msg,
 799                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 800         if (!nl_combis)
 801                 goto nla_put_failure;
 802
 803         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 804                 const struct ieee80211_iface_combination *c;
 805                 struct nlattr *nl_combi, *nl_limits;
 806
 807                 c = &wiphy->iface_combinations[i];
 808
 809                 nl_combi = nla_nest_start(msg, i + 1);
 810                 if (!nl_combi)
 811                         goto nla_put_failure;
 812
 813                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 814                 if (!nl_limits)
 815                         goto nla_put_failure;
 816
 817                 for (j = 0; j < c->n_limits; j++) {
 818                         struct nlattr *nl_limit;
 819
 820                         nl_limit = nla_nest_start(msg, j + 1);
 821                         if (!nl_limit)
 822                                 goto nla_put_failure;
 823                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 824                                         c->limits[j].max))
 825                                 goto nla_put_failure;
 826                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 827                                                 c->limits[j].types))
 828                                 goto nla_put_failure;
 829                         nla_nest_end(msg, nl_limit);
 830                 }
 831
 832                 nla_nest_end(msg, nl_limits);
 833
 834                 if (c->beacon_int_infra_match &&
 835                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 836                         goto nla_put_failure;
 837                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 838                                 c->num_different_channels) ||
 839                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 840                                 c->max_interfaces))
 841                         goto nla_put_failure;
 842
 843                 nla_nest_end(msg, nl_combi);
 844         }
 845
 846         nla_nest_end(msg, nl_combis);
 847
 848         return 0;
 849 nla_put_failure:
 850         return -ENOBUFS;
 851 }
 852
 853 static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
 854                               struct cfg80211_registered_device *dev)
 855 {
 856         void *hdr;
 857         struct nlattr *nl_bands, *nl_band;
 858         struct nlattr *nl_freqs, *nl_freq;
 859         struct nlattr *nl_rates, *nl_rate;
 860         struct nlattr *nl_cmds;
 861         enum ieee80211_band band;
 862         struct ieee80211_channel *chan;
 863         struct ieee80211_rate *rate;
 864         int i;
 865         const struct ieee80211_txrx_stypes *mgmt_stypes =
 866                                 dev->wiphy.mgmt_stypes;
 867
 868         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
 869         if (!hdr)
 870                 return -1;
 871
 872         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 873             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 874             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 875                         cfg80211_rdev_list_generation) ||
 876             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 877                        dev->wiphy.retry_short) ||
 878             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 879                        dev->wiphy.retry_long) ||
 880             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 881                         dev->wiphy.frag_threshold) ||
 882             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 883                         dev->wiphy.rts_threshold) ||
 884             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 885                        dev->wiphy.coverage_class) ||
 886             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 887                        dev->wiphy.max_scan_ssids) ||
 888             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 889                        dev->wiphy.max_sched_scan_ssids) ||
 890             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 891                         dev->wiphy.max_scan_ie_len) ||
 892             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 893                         dev->wiphy.max_sched_scan_ie_len) ||
 894             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 895                        dev->wiphy.max_match_sets))
 896                 goto nla_put_failure;
 897
 898         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 899             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 900                 goto nla_put_failure;
 901         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 902             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 903                 goto nla_put_failure;
 904         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 905             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 906                 goto nla_put_failure;
 907         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 908             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 909                 goto nla_put_failure;
 910         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 911             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 912                 goto nla_put_failure;
 913         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 914             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 915                 goto nla_put_failure;
 916
 917         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 918                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 919                     dev->wiphy.cipher_suites))
 920                 goto nla_put_failure;
 921
 922         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 923                        dev->wiphy.max_num_pmkids))
 924                 goto nla_put_failure;
 925
 926         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 927             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 928                 goto nla_put_failure;
 929
 930         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 931                         dev->wiphy.available_antennas_tx) ||
 932             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 933                         dev->wiphy.available_antennas_rx))
 934                 goto nla_put_failure;
 935
 936         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 937             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 938                         dev->wiphy.probe_resp_offload))
 939                 goto nla_put_failure;
 940
 941         if ((dev->wiphy.available_antennas_tx ||
 942              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 943                 u32 tx_ant = 0, rx_ant = 0;
 944                 int res;
 945                 res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
 946                 if (!res) {
 947                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 948                                         tx_ant) ||
 949                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 950                                         rx_ant))
 951                                 goto nla_put_failure;
 952                 }
 953         }
 954
 955         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 956                                 dev->wiphy.interface_modes))
 957                 goto nla_put_failure;
 958
 959         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 960         if (!nl_bands)
 961                 goto nla_put_failure;
 962
 963         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 964                 if (!dev->wiphy.bands[band])
 965                         continue;
 966
 967                 nl_band = nla_nest_start(msg, band);
 968                 if (!nl_band)
 969                         goto nla_put_failure;
 970
 971                 /* add HT info */
 972                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 973                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 974                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 975                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 976                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 977                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 978                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 979                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 980                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 981                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 982                         goto nla_put_failure;
 983
 984                 /* add VHT info */
 985                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
 986                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
 987                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
 988                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
 989                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
 990                                  dev->wiphy.bands[band]->vht_cap.cap)))
 991                         goto nla_put_failure;
 992
 993                 /* add frequencies */
 994                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
 995                 if (!nl_freqs)
 996                         goto nla_put_failure;
 997
 998                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
 999                         nl_freq = nla_nest_start(msg, i);
1000                         if (!nl_freq)
1001                                 goto nla_put_failure;
1002
1003                         chan = &dev->wiphy.bands[band]->channels[i];
1004
1005                         if (nl80211_msg_put_channel(msg, chan))
1006                                 goto nla_put_failure;
1007
1008                         nla_nest_end(msg, nl_freq);
1009                 }
1010
1011                 nla_nest_end(msg, nl_freqs);
1012
1013                 /* add bitrates */
1014                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1015                 if (!nl_rates)
1016                         goto nla_put_failure;
1017
1018                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1019                         nl_rate = nla_nest_start(msg, i);
1020                         if (!nl_rate)
1021                                 goto nla_put_failure;
1022
1023                         rate = &dev->wiphy.bands[band]->bitrates[i];
1024                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1025                                         rate->bitrate))
1026                                 goto nla_put_failure;
1027                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1028                             nla_put_flag(msg,
1029                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1030                                 goto nla_put_failure;
1031
1032                         nla_nest_end(msg, nl_rate);
1033                 }
1034
1035                 nla_nest_end(msg, nl_rates);
1036
1037                 nla_nest_end(msg, nl_band);
1038         }
1039         nla_nest_end(msg, nl_bands);
1040
1041         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1042         if (!nl_cmds)
1043                 goto nla_put_failure;
1044
1045         i = 0;
1046 #define CMD(op, n)                                              \
1047          do {                                                   \
1048                 if (dev->ops->op) {                             \
1049                         i++;                                    \
1050                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1051                                 goto nla_put_failure;           \
1052                 }                                               \
1053         } while (0)
1054
1055         CMD(add_virtual_intf, NEW_INTERFACE);
1056         CMD(change_virtual_intf, SET_INTERFACE);
1057         CMD(add_key, NEW_KEY);
1058         CMD(start_ap, START_AP);
1059         CMD(add_station, NEW_STATION);
1060         CMD(add_mpath, NEW_MPATH);
1061         CMD(update_mesh_config, SET_MESH_CONFIG);
1062         CMD(change_bss, SET_BSS);
1063         CMD(auth, AUTHENTICATE);
1064         CMD(assoc, ASSOCIATE);
1065         CMD(deauth, DEAUTHENTICATE);
1066         CMD(disassoc, DISASSOCIATE);
1067         CMD(join_ibss, JOIN_IBSS);
1068         CMD(join_mesh, JOIN_MESH);
1069         CMD(set_pmksa, SET_PMKSA);
1070         CMD(del_pmksa, DEL_PMKSA);
1071         CMD(flush_pmksa, FLUSH_PMKSA);
1072         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1073                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1074         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1075         CMD(mgmt_tx, FRAME);
1076         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1077         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1078                 i++;
1079                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1080                         goto nla_put_failure;
1081         }
1082         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1083             dev->ops->join_mesh) {
1084                 i++;
1085                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1086                         goto nla_put_failure;
1087         }
1088         CMD(set_wds_peer, SET_WDS_PEER);
1089         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1090                 CMD(tdls_mgmt, TDLS_MGMT);
1091                 CMD(tdls_oper, TDLS_OPER);
1092         }
1093         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1094                 CMD(sched_scan_start, START_SCHED_SCAN);
1095         CMD(probe_client, PROBE_CLIENT);
1096         CMD(set_noack_map, SET_NOACK_MAP);
1097         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1098                 i++;
1099                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1100                         goto nla_put_failure;
1101         }
1102
1103 #ifdef CONFIG_NL80211_TESTMODE
1104         CMD(testmode_cmd, TESTMODE);
1105 #endif
1106
1107 #undef CMD
1108
1109         if (dev->ops->connect || dev->ops->auth) {
1110                 i++;
1111                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1112                         goto nla_put_failure;
1113         }
1114
1115         if (dev->ops->disconnect || dev->ops->deauth) {
1116                 i++;
1117                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1118                         goto nla_put_failure;
1119         }
1120
1121         nla_nest_end(msg, nl_cmds);
1122
1123         if (dev->ops->remain_on_channel &&
1124             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1125             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1126                         dev->wiphy.max_remain_on_channel_duration))
1127                 goto nla_put_failure;
1128
1129         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1130             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1131                 goto nla_put_failure;
1132
1133         if (mgmt_stypes) {
1134                 u16 stypes;
1135                 struct nlattr *nl_ftypes, *nl_ifs;
1136                 enum nl80211_iftype ift;
1137
1138                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1139                 if (!nl_ifs)
1140                         goto nla_put_failure;
1141
1142                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1143                         nl_ftypes = nla_nest_start(msg, ift);
1144                         if (!nl_ftypes)
1145                                 goto nla_put_failure;
1146                         i = 0;
1147                         stypes = mgmt_stypes[ift].tx;
1148                         while (stypes) {
1149                                 if ((stypes & 1) &&
1150                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1151                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1152                                         goto nla_put_failure;
1153                                 stypes >>= 1;
1154                                 i++;
1155                         }
1156                         nla_nest_end(msg, nl_ftypes);
1157                 }
1158
1159                 nla_nest_end(msg, nl_ifs);
1160
1161                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1162                 if (!nl_ifs)
1163                         goto nla_put_failure;
1164
1165                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1166                         nl_ftypes = nla_nest_start(msg, ift);
1167                         if (!nl_ftypes)
1168                                 goto nla_put_failure;
1169                         i = 0;
1170                         stypes = mgmt_stypes[ift].rx;
1171                         while (stypes) {
1172                                 if ((stypes & 1) &&
1173                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1174                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1175                                         goto nla_put_failure;
1176                                 stypes >>= 1;
1177                                 i++;
1178                         }
1179                         nla_nest_end(msg, nl_ftypes);
1180                 }
1181                 nla_nest_end(msg, nl_ifs);
1182         }
1183
1184 #ifdef CONFIG_PM
1185         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1186                 struct nlattr *nl_wowlan;
1187
1188                 nl_wowlan = nla_nest_start(msg,
1189                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1190                 if (!nl_wowlan)
1191                         goto nla_put_failure;
1192
1193                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1194                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1195                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1196                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1197                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1198                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1199                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1200                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1201                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1202                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1203                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1204                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1205                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1206                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1207                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1208                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1209                     goto nla_put_failure;
1210                 if (dev->wiphy.wowlan.n_patterns) {
1211                         struct nl80211_wowlan_pattern_support pat = {
1212                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1213                                 .min_pattern_len =
1214                                         dev->wiphy.wowlan.pattern_min_len,
1215                                 .max_pattern_len =
1216                                         dev->wiphy.wowlan.pattern_max_len,
1217                         };
1218                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1219                                     sizeof(pat), &pat))
1220                                 goto nla_put_failure;
1221                 }
1222
1223                 nla_nest_end(msg, nl_wowlan);
1224         }
1225 #endif
1226
1227         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1228                                 dev->wiphy.software_iftypes))
1229                 goto nla_put_failure;
1230
1231         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1232                 goto nla_put_failure;
1233
1234         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1235             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1236                         dev->wiphy.ap_sme_capa))
1237                 goto nla_put_failure;
1238
1239         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1240                         dev->wiphy.features))
1241                 goto nla_put_failure;
1242
1243         if (dev->wiphy.ht_capa_mod_mask &&
1244             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1245                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1246                     dev->wiphy.ht_capa_mod_mask))
1247                 goto nla_put_failure;
1248
1249         return genlmsg_end(msg, hdr);
1250
1251  nla_put_failure:
1252         genlmsg_cancel(msg, hdr);
1253         return -EMSGSIZE;
1254 }
1255
1256 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1257 {
1258         int idx = 0;
1259         int start = cb->args[0];
1260         struct cfg80211_registered_device *dev;
1261
1262         mutex_lock(&cfg80211_mutex);
1263         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1264                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1265                         continue;
1266                 if (++idx <= start)
1267                         continue;
1268                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
1269                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1270                                        dev) < 0) {
1271                         idx--;
1272                         break;
1273                 }
1274         }
1275         mutex_unlock(&cfg80211_mutex);
1276
1277         cb->args[0] = idx;
1278
1279         return skb->len;
1280 }
1281
1282 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1283 {
1284         struct sk_buff *msg;
1285         struct cfg80211_registered_device *dev = info->user_ptr[0];
1286
1287         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1288         if (!msg)
1289                 return -ENOMEM;
1290
1291         if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
1292                 nlmsg_free(msg);
1293                 return -ENOBUFS;
1294         }
1295
1296         return genlmsg_reply(msg, info);
1297 }
1298
1299 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1300         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1301         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1302         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1303         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1304         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1305 };
1306
1307 static int parse_txq_params(struct nlattr *tb[],
1308                             struct ieee80211_txq_params *txq_params)
1309 {
1310         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1311             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1312             !tb[NL80211_TXQ_ATTR_AIFS])
1313                 return -EINVAL;
1314
1315         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1316         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1317         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1318         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1319         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1320
1321         if (txq_params->ac >= NL80211_NUM_ACS)
1322                 return -EINVAL;
1323
1324         return 0;
1325 }
1326
1327 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1328 {
1329         /*
1330          * You can only set the channel explicitly for WDS interfaces,
1331          * all others have their channel managed via their respective
1332          * "establish a connection" command (connect, join, ...)
1333          *
1334          * For AP/GO and mesh mode, the channel can be set with the
1335          * channel userspace API, but is only stored and passed to the
1336          * low-level driver when the AP starts or the mesh is joined.
1337          * This is for backward compatibility, userspace can also give
1338          * the channel in the start-ap or join-mesh commands instead.
1339          *
1340          * Monitors are special as they are normally slaved to
1341          * whatever else is going on, so they have their own special
1342          * operation to set the monitor channel if possible.
1343          */
1344         return !wdev ||
1345                 wdev->iftype == NL80211_IFTYPE_AP ||
1346                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1347                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1348                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1349 }
1350
1351 static bool nl80211_valid_channel_type(struct genl_info *info,
1352                                        enum nl80211_channel_type *channel_type)
1353 {
1354         enum nl80211_channel_type tmp;
1355
1356         if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
1357                 return false;
1358
1359         tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1360         if (tmp != NL80211_CHAN_NO_HT &&
1361             tmp != NL80211_CHAN_HT20 &&
1362             tmp != NL80211_CHAN_HT40PLUS &&
1363             tmp != NL80211_CHAN_HT40MINUS)
1364                 return false;
1365
1366         if (channel_type)
1367                 *channel_type = tmp;
1368
1369         return true;
1370 }
1371
1372 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1373                                  struct wireless_dev *wdev,
1374                                  struct genl_info *info)
1375 {
1376         struct ieee80211_channel *channel;
1377         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
1378         u32 freq;
1379         int result;
1380         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1381
1382         if (wdev)
1383                 iftype = wdev->iftype;
1384
1385         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1386                 return -EINVAL;
1387
1388         if (!nl80211_can_set_dev_channel(wdev))
1389                 return -EOPNOTSUPP;
1390
1391         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
1392             !nl80211_valid_channel_type(info, &channel_type))
1393                 return -EINVAL;
1394
1395         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1396
1397         mutex_lock(&rdev->devlist_mtx);
1398         switch (iftype) {
1399         case NL80211_IFTYPE_AP:
1400         case NL80211_IFTYPE_P2P_GO:
1401                 if (wdev->beacon_interval) {
1402                         result = -EBUSY;
1403                         break;
1404                 }
1405                 channel = rdev_freq_to_chan(rdev, freq, channel_type);
1406                 if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
1407                                                               channel,
1408                                                               channel_type)) {
1409                         result = -EINVAL;
1410                         break;
1411                 }
1412                 wdev->preset_chan = channel;
1413                 wdev->preset_chantype = channel_type;
1414                 result = 0;
1415                 break;
1416         case NL80211_IFTYPE_MESH_POINT:
1417                 result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
1418                 break;
1419         case NL80211_IFTYPE_MONITOR:
1420                 result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
1421                 break;
1422         default:
1423                 result = -EINVAL;
1424         }
1425         mutex_unlock(&rdev->devlist_mtx);
1426
1427         return result;
1428 }
1429
1430 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1431 {
1432         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1433         struct net_device *netdev = info->user_ptr[1];
1434
1435         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1436 }
1437
1438 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1439 {
1440         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1441         struct net_device *dev = info->user_ptr[1];
1442         struct wireless_dev *wdev = dev->ieee80211_ptr;
1443         const u8 *bssid;
1444
1445         if (!info->attrs[NL80211_ATTR_MAC])
1446                 return -EINVAL;
1447
1448         if (netif_running(dev))
1449                 return -EBUSY;
1450
1451         if (!rdev->ops->set_wds_peer)
1452                 return -EOPNOTSUPP;
1453
1454         if (wdev->iftype != NL80211_IFTYPE_WDS)
1455                 return -EOPNOTSUPP;
1456
1457         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1458         return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
1459 }
1460
1461
1462 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1463 {
1464         struct cfg80211_registered_device *rdev;
1465         struct net_device *netdev = NULL;
1466         struct wireless_dev *wdev;
1467         int result = 0, rem_txq_params = 0;
1468         struct nlattr *nl_txq_params;
1469         u32 changed;
1470         u8 retry_short = 0, retry_long = 0;
1471         u32 frag_threshold = 0, rts_threshold = 0;
1472         u8 coverage_class = 0;
1473
1474         /*
1475          * Try to find the wiphy and netdev. Normally this
1476          * function shouldn't need the netdev, but this is
1477          * done for backward compatibility -- previously
1478          * setting the channel was done per wiphy, but now
1479          * it is per netdev. Previous userland like hostapd
1480          * also passed a netdev to set_wiphy, so that it is
1481          * possible to let that go to the right netdev!
1482          */
1483         mutex_lock(&cfg80211_mutex);
1484
1485         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1486                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1487
1488                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1489                 if (netdev && netdev->ieee80211_ptr) {
1490                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1491                         mutex_lock(&rdev->mtx);
1492                 } else
1493                         netdev = NULL;
1494         }
1495
1496         if (!netdev) {
1497                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1498                                                   info->attrs);
1499                 if (IS_ERR(rdev)) {
1500                         mutex_unlock(&cfg80211_mutex);
1501                         return PTR_ERR(rdev);
1502                 }
1503                 wdev = NULL;
1504                 netdev = NULL;
1505                 result = 0;
1506
1507                 mutex_lock(&rdev->mtx);
1508         } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
1509                 wdev = netdev->ieee80211_ptr;
1510         else
1511                 wdev = NULL;
1512
1513         /*
1514          * end workaround code, by now the rdev is available
1515          * and locked, and wdev may or may not be NULL.
1516          */
1517
1518         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1519                 result = cfg80211_dev_rename(
1520                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1521
1522         mutex_unlock(&cfg80211_mutex);
1523
1524         if (result)
1525                 goto bad_res;
1526
1527         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1528                 struct ieee80211_txq_params txq_params;
1529                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1530
1531                 if (!rdev->ops->set_txq_params) {
1532                         result = -EOPNOTSUPP;
1533                         goto bad_res;
1534                 }
1535
1536                 if (!netdev) {
1537                         result = -EINVAL;
1538                         goto bad_res;
1539                 }
1540
1541                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1542                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1543                         result = -EINVAL;
1544                         goto bad_res;
1545                 }
1546
1547                 if (!netif_running(netdev)) {
1548                         result = -ENETDOWN;
1549                         goto bad_res;
1550                 }
1551
1552                 nla_for_each_nested(nl_txq_params,
1553                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1554                                     rem_txq_params) {
1555                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1556                                   nla_data(nl_txq_params),
1557                                   nla_len(nl_txq_params),
1558                                   txq_params_policy);
1559                         result = parse_txq_params(tb, &txq_params);
1560                         if (result)
1561                                 goto bad_res;
1562
1563                         result = rdev->ops->set_txq_params(&rdev->wiphy,
1564                                                            netdev,
1565                                                            &txq_params);
1566                         if (result)
1567                                 goto bad_res;
1568                 }
1569         }
1570
1571         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1572                 result = __nl80211_set_channel(rdev, wdev, info);
1573                 if (result)
1574                         goto bad_res;
1575         }
1576
1577         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1578                 enum nl80211_tx_power_setting type;
1579                 int idx, mbm = 0;
1580
1581                 if (!rdev->ops->set_tx_power) {
1582                         result = -EOPNOTSUPP;
1583                         goto bad_res;
1584                 }
1585
1586                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1587                 type = nla_get_u32(info->attrs[idx]);
1588
1589                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1590                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1591                         result = -EINVAL;
1592                         goto bad_res;
1593                 }
1594
1595                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1596                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1597                         mbm = nla_get_u32(info->attrs[idx]);
1598                 }
1599
1600                 result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
1601                 if (result)
1602                         goto bad_res;
1603         }
1604
1605         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1606             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1607                 u32 tx_ant, rx_ant;
1608                 if ((!rdev->wiphy.available_antennas_tx &&
1609                      !rdev->wiphy.available_antennas_rx) ||
1610                     !rdev->ops->set_antenna) {
1611                         result = -EOPNOTSUPP;
1612                         goto bad_res;
1613                 }
1614
1615                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1616                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1617
1618                 /* reject antenna configurations which don't match the
1619                  * available antenna masks, except for the "all" mask */
1620                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1621                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1622                         result = -EINVAL;
1623                         goto bad_res;
1624                 }
1625
1626                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1627                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1628
1629                 result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
1630                 if (result)
1631                         goto bad_res;
1632         }
1633
1634         changed = 0;
1635
1636         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1637                 retry_short = nla_get_u8(
1638                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1639                 if (retry_short == 0) {
1640                         result = -EINVAL;
1641                         goto bad_res;
1642                 }
1643                 changed |= WIPHY_PARAM_RETRY_SHORT;
1644         }
1645
1646         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1647                 retry_long = nla_get_u8(
1648                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1649                 if (retry_long == 0) {
1650                         result = -EINVAL;
1651                         goto bad_res;
1652                 }
1653                 changed |= WIPHY_PARAM_RETRY_LONG;
1654         }
1655
1656         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1657                 frag_threshold = nla_get_u32(
1658                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1659                 if (frag_threshold < 256) {
1660                         result = -EINVAL;
1661                         goto bad_res;
1662                 }
1663                 if (frag_threshold != (u32) -1) {
1664                         /*
1665                          * Fragments (apart from the last one) are required to
1666                          * have even length. Make the fragmentation code
1667                          * simpler by stripping LSB should someone try to use
1668                          * odd threshold value.
1669                          */
1670                         frag_threshold &= ~0x1;
1671                 }
1672                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1673         }
1674
1675         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1676                 rts_threshold = nla_get_u32(
1677                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1678                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1679         }
1680
1681         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1682                 coverage_class = nla_get_u8(
1683                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1684                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1685         }
1686
1687         if (changed) {
1688                 u8 old_retry_short, old_retry_long;
1689                 u32 old_frag_threshold, old_rts_threshold;
1690                 u8 old_coverage_class;
1691
1692                 if (!rdev->ops->set_wiphy_params) {
1693                         result = -EOPNOTSUPP;
1694                         goto bad_res;
1695                 }
1696
1697                 old_retry_short = rdev->wiphy.retry_short;
1698                 old_retry_long = rdev->wiphy.retry_long;
1699                 old_frag_threshold = rdev->wiphy.frag_threshold;
1700                 old_rts_threshold = rdev->wiphy.rts_threshold;
1701                 old_coverage_class = rdev->wiphy.coverage_class;
1702
1703                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1704                         rdev->wiphy.retry_short = retry_short;
1705                 if (changed & WIPHY_PARAM_RETRY_LONG)
1706                         rdev->wiphy.retry_long = retry_long;
1707                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1708                         rdev->wiphy.frag_threshold = frag_threshold;
1709                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1710                         rdev->wiphy.rts_threshold = rts_threshold;
1711                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1712                         rdev->wiphy.coverage_class = coverage_class;
1713
1714                 result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
1715                 if (result) {
1716                         rdev->wiphy.retry_short = old_retry_short;
1717                         rdev->wiphy.retry_long = old_retry_long;
1718                         rdev->wiphy.frag_threshold = old_frag_threshold;
1719                         rdev->wiphy.rts_threshold = old_rts_threshold;
1720                         rdev->wiphy.coverage_class = old_coverage_class;
1721                 }
1722         }
1723
1724  bad_res:
1725         mutex_unlock(&rdev->mtx);
1726         if (netdev)
1727                 dev_put(netdev);
1728         return result;
1729 }
1730
1731
1732 static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
1733                               struct cfg80211_registered_device *rdev,
1734                               struct net_device *dev)
1735 {
1736         void *hdr;
1737         u64 wdev_id = (u64)dev->ieee80211_ptr->identifier |
1738                       ((u64)rdev->wiphy_idx << 32);
1739
1740         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1741         if (!hdr)
1742                 return -1;
1743
1744         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1745             nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1746             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
1747             nla_put_u32(msg, NL80211_ATTR_IFTYPE,
1748                         dev->ieee80211_ptr->iftype) ||
1749             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id) ||
1750             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1751                         rdev->devlist_generation ^
1752                         (cfg80211_rdev_list_generation << 2)))
1753                 goto nla_put_failure;
1754
1755         if (rdev->monitor_channel) {
1756                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1757                                 rdev->monitor_channel->center_freq) ||
1758                     nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1759                                 rdev->monitor_channel_type))
1760                         goto nla_put_failure;
1761         }
1762
1763         return genlmsg_end(msg, hdr);
1764
1765  nla_put_failure:
1766         genlmsg_cancel(msg, hdr);
1767         return -EMSGSIZE;
1768 }
1769
1770 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1771 {
1772         int wp_idx = 0;
1773         int if_idx = 0;
1774         int wp_start = cb->args[0];
1775         int if_start = cb->args[1];
1776         struct cfg80211_registered_device *rdev;
1777         struct wireless_dev *wdev;
1778
1779         mutex_lock(&cfg80211_mutex);
1780         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1781                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1782                         continue;
1783                 if (wp_idx < wp_start) {
1784                         wp_idx++;
1785                         continue;
1786                 }
1787                 if_idx = 0;
1788
1789                 mutex_lock(&rdev->devlist_mtx);
1790                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1791                         if (if_idx < if_start) {
1792                                 if_idx++;
1793                                 continue;
1794                         }
1795                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
1796                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1797                                                rdev, wdev->netdev) < 0) {
1798                                 mutex_unlock(&rdev->devlist_mtx);
1799                                 goto out;
1800                         }
1801                         if_idx++;
1802                 }
1803                 mutex_unlock(&rdev->devlist_mtx);
1804
1805                 wp_idx++;
1806         }
1807  out:
1808         mutex_unlock(&cfg80211_mutex);
1809
1810         cb->args[0] = wp_idx;
1811         cb->args[1] = if_idx;
1812
1813         return skb->len;
1814 }
1815
1816 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1817 {
1818         struct sk_buff *msg;
1819         struct cfg80211_registered_device *dev = info->user_ptr[0];
1820         struct net_device *netdev = info->user_ptr[1];
1821
1822         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1823         if (!msg)
1824                 return -ENOMEM;
1825
1826         if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
1827                                dev, netdev) < 0) {
1828                 nlmsg_free(msg);
1829                 return -ENOBUFS;
1830         }
1831
1832         return genlmsg_reply(msg, info);
1833 }
1834
1835 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1836         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1837         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1838         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1839         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1840         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1841 };
1842
1843 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1844 {
1845         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1846         int flag;
1847
1848         *mntrflags = 0;
1849
1850         if (!nla)
1851                 return -EINVAL;
1852
1853         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1854                              nla, mntr_flags_policy))
1855                 return -EINVAL;
1856
1857         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1858                 if (flags[flag])
1859                         *mntrflags |= (1<<flag);
1860
1861         return 0;
1862 }
1863
1864 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1865                                struct net_device *netdev, u8 use_4addr,
1866                                enum nl80211_iftype iftype)
1867 {
1868         if (!use_4addr) {
1869                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1870                         return -EBUSY;
1871                 return 0;
1872         }
1873
1874         switch (iftype) {
1875         case NL80211_IFTYPE_AP_VLAN:
1876                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1877                         return 0;
1878                 break;
1879         case NL80211_IFTYPE_STATION:
1880                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
1881                         return 0;
1882                 break;
1883         default:
1884                 break;
1885         }
1886
1887         return -EOPNOTSUPP;
1888 }
1889
1890 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
1891 {
1892         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1893         struct vif_params params;
1894         int err;
1895         enum nl80211_iftype otype, ntype;
1896         struct net_device *dev = info->user_ptr[1];
1897         u32 _flags, *flags = NULL;
1898         bool change = false;
1899
1900         memset(&params, 0, sizeof(params));
1901
1902         otype = ntype = dev->ieee80211_ptr->iftype;
1903
1904         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1905                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1906                 if (otype != ntype)
1907                         change = true;
1908                 if (ntype > NL80211_IFTYPE_MAX)
1909                         return -EINVAL;
1910         }
1911
1912         if (info->attrs[NL80211_ATTR_MESH_ID]) {
1913                 struct wireless_dev *wdev = dev->ieee80211_ptr;
1914
1915                 if (ntype != NL80211_IFTYPE_MESH_POINT)
1916                         return -EINVAL;
1917                 if (netif_running(dev))
1918                         return -EBUSY;
1919
1920                 wdev_lock(wdev);
1921                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
1922                              IEEE80211_MAX_MESH_ID_LEN);
1923                 wdev->mesh_id_up_len =
1924                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
1925                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
1926                        wdev->mesh_id_up_len);
1927                 wdev_unlock(wdev);
1928         }
1929
1930         if (info->attrs[NL80211_ATTR_4ADDR]) {
1931                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1932                 change = true;
1933                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
1934                 if (err)
1935                         return err;
1936         } else {
1937                 params.use_4addr = -1;
1938         }
1939
1940         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
1941                 if (ntype != NL80211_IFTYPE_MONITOR)
1942                         return -EINVAL;
1943                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
1944                                           &_flags);
1945                 if (err)
1946                         return err;
1947
1948                 flags = &_flags;
1949                 change = true;
1950         }
1951
1952         if (change)
1953                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
1954         else
1955                 err = 0;
1956
1957         if (!err && params.use_4addr != -1)
1958                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
1959
1960         return err;
1961 }
1962
1963 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
1964 {
1965         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1966         struct vif_params params;
1967         struct net_device *dev;
1968         int err;
1969         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
1970         u32 flags;
1971
1972         memset(&params, 0, sizeof(params));
1973
1974         if (!info->attrs[NL80211_ATTR_IFNAME])
1975                 return -EINVAL;
1976
1977         if (info->attrs[NL80211_ATTR_IFTYPE]) {
1978                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
1979                 if (type > NL80211_IFTYPE_MAX)
1980                         return -EINVAL;
1981         }
1982
1983         if (!rdev->ops->add_virtual_intf ||
1984             !(rdev->wiphy.interface_modes & (1 << type)))
1985                 return -EOPNOTSUPP;
1986
1987         if (info->attrs[NL80211_ATTR_4ADDR]) {
1988                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
1989                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
1990                 if (err)
1991                         return err;
1992         }
1993
1994         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
1995                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
1996                                   &flags);
1997         dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
1998                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
1999                 type, err ? NULL : &flags, &params);
2000         if (IS_ERR(dev))
2001                 return PTR_ERR(dev);
2002
2003         if (type == NL80211_IFTYPE_MESH_POINT &&
2004             info->attrs[NL80211_ATTR_MESH_ID]) {
2005                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2006
2007                 wdev_lock(wdev);
2008                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2009                              IEEE80211_MAX_MESH_ID_LEN);
2010                 wdev->mesh_id_up_len =
2011                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2012                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2013                        wdev->mesh_id_up_len);
2014                 wdev_unlock(wdev);
2015         }
2016
2017         return 0;
2018 }
2019
2020 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2021 {
2022         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2023         struct net_device *dev = info->user_ptr[1];
2024
2025         if (!rdev->ops->del_virtual_intf)
2026                 return -EOPNOTSUPP;
2027
2028         return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
2029 }
2030
2031 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2032 {
2033         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2034         struct net_device *dev = info->user_ptr[1];
2035         u16 noack_map;
2036
2037         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2038                 return -EINVAL;
2039
2040         if (!rdev->ops->set_noack_map)
2041                 return -EOPNOTSUPP;
2042
2043         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2044
2045         return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
2046 }
2047
2048 struct get_key_cookie {
2049         struct sk_buff *msg;
2050         int error;
2051         int idx;
2052 };
2053
2054 static void get_key_callback(void *c, struct key_params *params)
2055 {
2056         struct nlattr *key;
2057         struct get_key_cookie *cookie = c;
2058
2059         if ((params->key &&
2060              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2061                      params->key_len, params->key)) ||
2062             (params->seq &&
2063              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2064                      params->seq_len, params->seq)) ||
2065             (params->cipher &&
2066              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2067                          params->cipher)))
2068                 goto nla_put_failure;
2069
2070         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2071         if (!key)
2072                 goto nla_put_failure;
2073
2074         if ((params->key &&
2075              nla_put(cookie->msg, NL80211_KEY_DATA,
2076                      params->key_len, params->key)) ||
2077             (params->seq &&
2078              nla_put(cookie->msg, NL80211_KEY_SEQ,
2079                      params->seq_len, params->seq)) ||
2080             (params->cipher &&
2081              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2082                          params->cipher)))
2083                 goto nla_put_failure;
2084
2085         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2086                 goto nla_put_failure;
2087
2088         nla_nest_end(cookie->msg, key);
2089
2090         return;
2091  nla_put_failure:
2092         cookie->error = 1;
2093 }
2094
2095 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2096 {
2097         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2098         int err;
2099         struct net_device *dev = info->user_ptr[1];
2100         u8 key_idx = 0;
2101         const u8 *mac_addr = NULL;
2102         bool pairwise;
2103         struct get_key_cookie cookie = {
2104                 .error = 0,
2105         };
2106         void *hdr;
2107         struct sk_buff *msg;
2108
2109         if (info->attrs[NL80211_ATTR_KEY_IDX])
2110                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2111
2112         if (key_idx > 5)
2113                 return -EINVAL;
2114
2115         if (info->attrs[NL80211_ATTR_MAC])
2116                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2117
2118         pairwise = !!mac_addr;
2119         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2120                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2121                 if (kt >= NUM_NL80211_KEYTYPES)
2122                         return -EINVAL;
2123                 if (kt != NL80211_KEYTYPE_GROUP &&
2124                     kt != NL80211_KEYTYPE_PAIRWISE)
2125                         return -EINVAL;
2126                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2127         }
2128
2129         if (!rdev->ops->get_key)
2130                 return -EOPNOTSUPP;
2131
2132         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2133         if (!msg)
2134                 return -ENOMEM;
2135
2136         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
2137                              NL80211_CMD_NEW_KEY);
2138         if (IS_ERR(hdr))
2139                 return PTR_ERR(hdr);
2140
2141         cookie.msg = msg;
2142         cookie.idx = key_idx;
2143
2144         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2145             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2146                 goto nla_put_failure;
2147         if (mac_addr &&
2148             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2149                 goto nla_put_failure;
2150
2151         if (pairwise && mac_addr &&
2152             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2153                 return -ENOENT;
2154
2155         err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
2156                                  mac_addr, &cookie, get_key_callback);
2157
2158         if (err)
2159                 goto free_msg;
2160
2161         if (cookie.error)
2162                 goto nla_put_failure;
2163
2164         genlmsg_end(msg, hdr);
2165         return genlmsg_reply(msg, info);
2166
2167  nla_put_failure:
2168         err = -ENOBUFS;
2169  free_msg:
2170         nlmsg_free(msg);
2171         return err;
2172 }
2173
2174 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2175 {
2176         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2177         struct key_parse key;
2178         int err;
2179         struct net_device *dev = info->user_ptr[1];
2180
2181         err = nl80211_parse_key(info, &key);
2182         if (err)
2183                 return err;
2184
2185         if (key.idx < 0)
2186                 return -EINVAL;
2187
2188         /* only support setting default key */
2189         if (!key.def && !key.defmgmt)
2190                 return -EINVAL;
2191
2192         wdev_lock(dev->ieee80211_ptr);
2193
2194         if (key.def) {
2195                 if (!rdev->ops->set_default_key) {
2196                         err = -EOPNOTSUPP;
2197                         goto out;
2198                 }
2199
2200                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2201                 if (err)
2202                         goto out;
2203
2204                 err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
2205                                                  key.def_uni, key.def_multi);
2206
2207                 if (err)
2208                         goto out;
2209
2210 #ifdef CONFIG_CFG80211_WEXT
2211                 dev->ieee80211_ptr->wext.default_key = key.idx;
2212 #endif
2213         } else {
2214                 if (key.def_uni || !key.def_multi) {
2215                         err = -EINVAL;
2216                         goto out;
2217                 }
2218
2219                 if (!rdev->ops->set_default_mgmt_key) {
2220                         err = -EOPNOTSUPP;
2221                         goto out;
2222                 }
2223
2224                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2225                 if (err)
2226                         goto out;
2227
2228                 err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
2229                                                       dev, key.idx);
2230                 if (err)
2231                         goto out;
2232
2233 #ifdef CONFIG_CFG80211_WEXT
2234                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2235 #endif
2236         }
2237
2238  out:
2239         wdev_unlock(dev->ieee80211_ptr);
2240
2241         return err;
2242 }
2243
2244 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2245 {
2246         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2247         int err;
2248         struct net_device *dev = info->user_ptr[1];
2249         struct key_parse key;
2250         const u8 *mac_addr = NULL;
2251
2252         err = nl80211_parse_key(info, &key);
2253         if (err)
2254                 return err;
2255
2256         if (!key.p.key)
2257                 return -EINVAL;
2258
2259         if (info->attrs[NL80211_ATTR_MAC])
2260                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2261
2262         if (key.type == -1) {
2263                 if (mac_addr)
2264                         key.type = NL80211_KEYTYPE_PAIRWISE;
2265                 else
2266                         key.type = NL80211_KEYTYPE_GROUP;
2267         }
2268
2269         /* for now */
2270         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2271             key.type != NL80211_KEYTYPE_GROUP)
2272                 return -EINVAL;
2273
2274         if (!rdev->ops->add_key)
2275                 return -EOPNOTSUPP;
2276
2277         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2278                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2279                                            mac_addr))
2280                 return -EINVAL;
2281
2282         wdev_lock(dev->ieee80211_ptr);
2283         err = nl80211_key_allowed(dev->ieee80211_ptr);
2284         if (!err)
2285                 err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
2286                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2287                                          mac_addr, &key.p);
2288         wdev_unlock(dev->ieee80211_ptr);
2289
2290         return err;
2291 }
2292
2293 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2294 {
2295         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2296         int err;
2297         struct net_device *dev = info->user_ptr[1];
2298         u8 *mac_addr = NULL;
2299         struct key_parse key;
2300
2301         err = nl80211_parse_key(info, &key);
2302         if (err)
2303                 return err;
2304
2305         if (info->attrs[NL80211_ATTR_MAC])
2306                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2307
2308         if (key.type == -1) {
2309                 if (mac_addr)
2310                         key.type = NL80211_KEYTYPE_PAIRWISE;
2311                 else
2312                         key.type = NL80211_KEYTYPE_GROUP;
2313         }
2314
2315         /* for now */
2316         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2317             key.type != NL80211_KEYTYPE_GROUP)
2318                 return -EINVAL;
2319
2320         if (!rdev->ops->del_key)
2321                 return -EOPNOTSUPP;
2322
2323         wdev_lock(dev->ieee80211_ptr);
2324         err = nl80211_key_allowed(dev->ieee80211_ptr);
2325
2326         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2327             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2328                 err = -ENOENT;
2329
2330         if (!err)
2331                 err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
2332                                          key.type == NL80211_KEYTYPE_PAIRWISE,
2333                                          mac_addr);
2334
2335 #ifdef CONFIG_CFG80211_WEXT
2336         if (!err) {
2337                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2338                         dev->ieee80211_ptr->wext.default_key = -1;
2339                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2340                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2341         }
2342 #endif
2343         wdev_unlock(dev->ieee80211_ptr);
2344
2345         return err;
2346 }
2347
2348 static int nl80211_parse_beacon(struct genl_info *info,
2349                                 struct cfg80211_beacon_data *bcn)
2350 {
2351         bool haveinfo = false;
2352
2353         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2354             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2355             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2356             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2357                 return -EINVAL;
2358
2359         memset(bcn, 0, sizeof(*bcn));
2360
2361         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2362                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2363                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2364                 if (!bcn->head_len)
2365                         return -EINVAL;
2366                 haveinfo = true;
2367         }
2368
2369         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2370                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2371                 bcn->tail_len =
2372                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2373                 haveinfo = true;
2374         }
2375
2376         if (!haveinfo)
2377                 return -EINVAL;
2378
2379         if (info->attrs[NL80211_ATTR_IE]) {
2380                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2381                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2382         }
2383
2384         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2385                 bcn->proberesp_ies =
2386                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2387                 bcn->proberesp_ies_len =
2388                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2389         }
2390
2391         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2392                 bcn->assocresp_ies =
2393                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2394                 bcn->assocresp_ies_len =
2395                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2396         }
2397
2398         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2399                 bcn->probe_resp =
2400                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2401                 bcn->probe_resp_len =
2402                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2403         }
2404
2405         return 0;
2406 }
2407
2408 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2409                                    struct cfg80211_ap_settings *params)
2410 {
2411         struct wireless_dev *wdev;
2412         bool ret = false;
2413
2414         mutex_lock(&rdev->devlist_mtx);
2415
2416         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2417                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2418                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2419                         continue;
2420
2421                 if (!wdev->preset_chan)
2422                         continue;
2423
2424                 params->channel = wdev->preset_chan;
2425                 params->channel_type = wdev->preset_chantype;
2426                 ret = true;
2427                 break;
2428         }
2429
2430         mutex_unlock(&rdev->devlist_mtx);
2431
2432         return ret;
2433 }
2434
2435 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2436 {
2437         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2438         struct net_device *dev = info->user_ptr[1];
2439         struct wireless_dev *wdev = dev->ieee80211_ptr;
2440         struct cfg80211_ap_settings params;
2441         int err;
2442
2443         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2444             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2445                 return -EOPNOTSUPP;
2446
2447         if (!rdev->ops->start_ap)
2448                 return -EOPNOTSUPP;
2449
2450         if (wdev->beacon_interval)
2451                 return -EALREADY;
2452
2453         memset(&params, 0, sizeof(params));
2454
2455         /* these are required for START_AP */
2456         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2457             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2458             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2459                 return -EINVAL;
2460
2461         err = nl80211_parse_beacon(info, &params.beacon);
2462         if (err)
2463                 return err;
2464
2465         params.beacon_interval =
2466                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2467         params.dtim_period =
2468                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2469
2470         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2471         if (err)
2472                 return err;
2473
2474         /*
2475          * In theory, some of these attributes should be required here
2476          * but since they were not used when the command was originally
2477          * added, keep them optional for old user space programs to let
2478          * them continue to work with drivers that do not need the
2479          * additional information -- drivers must check!
2480          */
2481         if (info->attrs[NL80211_ATTR_SSID]) {
2482                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2483                 params.ssid_len =
2484                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2485                 if (params.ssid_len == 0 ||
2486                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2487                         return -EINVAL;
2488         }
2489
2490         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2491                 params.hidden_ssid = nla_get_u32(
2492                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2493                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2494                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2495                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2496                         return -EINVAL;
2497         }
2498
2499         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2500
2501         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2502                 params.auth_type = nla_get_u32(
2503                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2504                 if (!nl80211_valid_auth_type(params.auth_type))
2505                         return -EINVAL;
2506         } else
2507                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2508
2509         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2510                                       NL80211_MAX_NR_CIPHER_SUITES);
2511         if (err)
2512                 return err;
2513
2514         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2515                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2516                         return -EOPNOTSUPP;
2517                 params.inactivity_timeout = nla_get_u16(
2518                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2519         }
2520
2521         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2522                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
2523
2524                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
2525                     !nl80211_valid_channel_type(info, &channel_type))
2526                         return -EINVAL;
2527
2528                 params.channel = rdev_freq_to_chan(rdev,
2529                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
2530                         channel_type);
2531                 if (!params.channel)
2532                         return -EINVAL;
2533                 params.channel_type = channel_type;
2534         } else if (wdev->preset_chan) {
2535                 params.channel = wdev->preset_chan;
2536                 params.channel_type = wdev->preset_chantype;
2537         } else if (!nl80211_get_ap_channel(rdev, &params))
2538                 return -EINVAL;
2539
2540         if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
2541                                           params.channel_type))
2542                 return -EINVAL;
2543
2544         mutex_lock(&rdev->devlist_mtx);
2545         err = cfg80211_can_use_chan(rdev, wdev, params.channel,
2546                                     CHAN_MODE_SHARED);
2547         mutex_unlock(&rdev->devlist_mtx);
2548
2549         if (err)
2550                 return err;
2551
2552         err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
2553         if (!err) {
2554                 wdev->preset_chan = params.channel;
2555                 wdev->preset_chantype = params.channel_type;
2556                 wdev->beacon_interval = params.beacon_interval;
2557                 wdev->channel = params.channel;
2558         }
2559         return err;
2560 }
2561
2562 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2563 {
2564         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2565         struct net_device *dev = info->user_ptr[1];
2566         struct wireless_dev *wdev = dev->ieee80211_ptr;
2567         struct cfg80211_beacon_data params;
2568         int err;
2569
2570         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2571             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2572                 return -EOPNOTSUPP;
2573
2574         if (!rdev->ops->change_beacon)
2575                 return -EOPNOTSUPP;
2576
2577         if (!wdev->beacon_interval)
2578                 return -EINVAL;
2579
2580         err = nl80211_parse_beacon(info, &params);
2581         if (err)
2582                 return err;
2583
2584         return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
2585 }
2586
2587 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2588 {
2589         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2590         struct net_device *dev = info->user_ptr[1];
2591
2592         return cfg80211_stop_ap(rdev, dev);
2593 }
2594
2595 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2596         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2597         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2598         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2599         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2600         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2601         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2602 };
2603
2604 static int parse_station_flags(struct genl_info *info,
2605                                enum nl80211_iftype iftype,
2606                                struct station_parameters *params)
2607 {
2608         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2609         struct nlattr *nla;
2610         int flag;
2611
2612         /*
2613          * Try parsing the new attribute first so userspace
2614          * can specify both for older kernels.
2615          */
2616         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2617         if (nla) {
2618                 struct nl80211_sta_flag_update *sta_flags;
2619
2620                 sta_flags = nla_data(nla);
2621                 params->sta_flags_mask = sta_flags->mask;
2622                 params->sta_flags_set = sta_flags->set;
2623                 if ((params->sta_flags_mask |
2624                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2625                         return -EINVAL;
2626                 return 0;
2627         }
2628
2629         /* if present, parse the old attribute */
2630
2631         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2632         if (!nla)
2633                 return 0;
2634
2635         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2636                              nla, sta_flags_policy))
2637                 return -EINVAL;
2638
2639         /*
2640          * Only allow certain flags for interface types so that
2641          * other attributes are silently ignored. Remember that
2642          * this is backward compatibility code with old userspace
2643          * and shouldn't be hit in other cases anyway.
2644          */
2645         switch (iftype) {
2646         case NL80211_IFTYPE_AP:
2647         case NL80211_IFTYPE_AP_VLAN:
2648         case NL80211_IFTYPE_P2P_GO:
2649                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2650                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2651                                          BIT(NL80211_STA_FLAG_WME) |
2652                                          BIT(NL80211_STA_FLAG_MFP);
2653                 break;
2654         case NL80211_IFTYPE_P2P_CLIENT:
2655         case NL80211_IFTYPE_STATION:
2656                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2657                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2658                 break;
2659         case NL80211_IFTYPE_MESH_POINT:
2660                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2661                                          BIT(NL80211_STA_FLAG_MFP) |
2662                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2663         default:
2664                 return -EINVAL;
2665         }
2666
2667         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2668                 if (flags[flag]) {
2669                         params->sta_flags_set |= (1<<flag);
2670
2671                         /* no longer support new API additions in old API */
2672                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2673                                 return -EINVAL;
2674                 }
2675         }
2676
2677         return 0;
2678 }
2679
2680 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2681                                  int attr)
2682 {
2683         struct nlattr *rate;
2684         u32 bitrate;
2685         u16 bitrate_compat;
2686
2687         rate = nla_nest_start(msg, attr);
2688         if (!rate)
2689                 goto nla_put_failure;
2690
2691         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2692         bitrate = cfg80211_calculate_bitrate(info);
2693         /* report 16-bit bitrate only if we can */
2694         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2695         if ((bitrate > 0 &&
2696              nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate)) ||
2697             (bitrate_compat > 0 &&
2698              nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat)) ||
2699             ((info->flags & RATE_INFO_FLAGS_MCS) &&
2700              nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
2701             ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
2702              nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
2703             ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
2704              nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
2705                 goto nla_put_failure;
2706
2707         nla_nest_end(msg, rate);
2708         return true;
2709
2710 nla_put_failure:
2711         return false;
2712 }
2713
2714 static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
2715                                 int flags,
2716                                 struct cfg80211_registered_device *rdev,
2717                                 struct net_device *dev,
2718                                 const u8 *mac_addr, struct station_info *sinfo)
2719 {
2720         void *hdr;
2721         struct nlattr *sinfoattr, *bss_param;
2722
2723         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
2724         if (!hdr)
2725                 return -1;
2726
2727         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2728             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2729             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2730                 goto nla_put_failure;
2731
2732         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2733         if (!sinfoattr)
2734                 goto nla_put_failure;
2735         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2736             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2737                         sinfo->connected_time))
2738                 goto nla_put_failure;
2739         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2740             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2741                         sinfo->inactive_time))
2742                 goto nla_put_failure;
2743         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2744             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2745                         sinfo->rx_bytes))
2746                 goto nla_put_failure;
2747         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2748             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2749                         sinfo->tx_bytes))
2750                 goto nla_put_failure;
2751         if ((sinfo->filled & STATION_INFO_LLID) &&
2752             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2753                 goto nla_put_failure;
2754         if ((sinfo->filled & STATION_INFO_PLID) &&
2755             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2756                 goto nla_put_failure;
2757         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2758             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2759                        sinfo->plink_state))
2760                 goto nla_put_failure;
2761         switch (rdev->wiphy.signal_type) {
2762         case CFG80211_SIGNAL_TYPE_MBM:
2763                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2764                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2765                                sinfo->signal))
2766                         goto nla_put_failure;
2767                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2768                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2769                                sinfo->signal_avg))
2770                         goto nla_put_failure;
2771                 break;
2772         default:
2773                 break;
2774         }
2775         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
2776                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
2777                                           NL80211_STA_INFO_TX_BITRATE))
2778                         goto nla_put_failure;
2779         }
2780         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
2781                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
2782                                           NL80211_STA_INFO_RX_BITRATE))
2783                         goto nla_put_failure;
2784         }
2785         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
2786             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
2787                         sinfo->rx_packets))
2788                 goto nla_put_failure;
2789         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
2790             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
2791                         sinfo->tx_packets))
2792                 goto nla_put_failure;
2793         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
2794             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
2795                         sinfo->tx_retries))
2796                 goto nla_put_failure;
2797         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
2798             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
2799                         sinfo->tx_failed))
2800                 goto nla_put_failure;
2801         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
2802             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
2803                         sinfo->beacon_loss_count))
2804                 goto nla_put_failure;
2805         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
2806                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
2807                 if (!bss_param)
2808                         goto nla_put_failure;
2809
2810                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
2811                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
2812                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
2813                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
2814                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
2815                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
2816                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
2817                                sinfo->bss_param.dtim_period) ||
2818                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
2819                                 sinfo->bss_param.beacon_interval))
2820                         goto nla_put_failure;
2821
2822                 nla_nest_end(msg, bss_param);
2823         }
2824         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
2825             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
2826                     sizeof(struct nl80211_sta_flag_update),
2827                     &sinfo->sta_flags))
2828                 goto nla_put_failure;
2829         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
2830                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
2831                             sinfo->t_offset))
2832                 goto nla_put_failure;
2833         nla_nest_end(msg, sinfoattr);
2834
2835         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
2836             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
2837                     sinfo->assoc_req_ies))
2838                 goto nla_put_failure;
2839
2840         return genlmsg_end(msg, hdr);
2841
2842  nla_put_failure:
2843         genlmsg_cancel(msg, hdr);
2844         return -EMSGSIZE;
2845 }
2846
2847 static int nl80211_dump_station(struct sk_buff *skb,
2848                                 struct netlink_callback *cb)
2849 {
2850         struct station_info sinfo;
2851         struct cfg80211_registered_device *dev;
2852         struct net_device *netdev;
2853         u8 mac_addr[ETH_ALEN];
2854         int sta_idx = cb->args[1];
2855         int err;
2856
2857         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
2858         if (err)
2859                 return err;
2860
2861         if (!dev->ops->dump_station) {
2862                 err = -EOPNOTSUPP;
2863                 goto out_err;
2864         }
2865
2866         while (1) {
2867                 memset(&sinfo, 0, sizeof(sinfo));
2868                 err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
2869                                              mac_addr, &sinfo);
2870                 if (err == -ENOENT)
2871                         break;
2872                 if (err)
2873                         goto out_err;
2874
2875                 if (nl80211_send_station(skb,
2876                                 NETLINK_CB(cb->skb).pid,
2877                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2878                                 dev, netdev, mac_addr,
2879                                 &sinfo) < 0)
2880                         goto out;
2881
2882                 sta_idx++;
2883         }
2884
2885
2886  out:
2887         cb->args[1] = sta_idx;
2888         err = skb->len;
2889  out_err:
2890         nl80211_finish_netdev_dump(dev);
2891
2892         return err;
2893 }
2894
2895 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
2896 {
2897         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2898         struct net_device *dev = info->user_ptr[1];
2899         struct station_info sinfo;
2900         struct sk_buff *msg;
2901         u8 *mac_addr = NULL;
2902         int err;
2903
2904         memset(&sinfo, 0, sizeof(sinfo));
2905
2906         if (!info->attrs[NL80211_ATTR_MAC])
2907                 return -EINVAL;
2908
2909         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2910
2911         if (!rdev->ops->get_station)
2912                 return -EOPNOTSUPP;
2913
2914         err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
2915         if (err)
2916                 return err;
2917
2918         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2919         if (!msg)
2920                 return -ENOMEM;
2921
2922         if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
2923                                  rdev, dev, mac_addr, &sinfo) < 0) {
2924                 nlmsg_free(msg);
2925                 return -ENOBUFS;
2926         }
2927
2928         return genlmsg_reply(msg, info);
2929 }
2930
2931 /*
2932  * Get vlan interface making sure it is running and on the right wiphy.
2933  */
2934 static struct net_device *get_vlan(struct genl_info *info,
2935                                    struct cfg80211_registered_device *rdev)
2936 {
2937         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
2938         struct net_device *v;
2939         int ret;
2940
2941         if (!vlanattr)
2942                 return NULL;
2943
2944         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
2945         if (!v)
2946                 return ERR_PTR(-ENODEV);
2947
2948         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
2949                 ret = -EINVAL;
2950                 goto error;
2951         }
2952
2953         if (!netif_running(v)) {
2954                 ret = -ENETDOWN;
2955                 goto error;
2956         }
2957
2958         return v;
2959  error:
2960         dev_put(v);
2961         return ERR_PTR(ret);
2962 }
2963
2964 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
2965 {
2966         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2967         int err;
2968         struct net_device *dev = info->user_ptr[1];
2969         struct station_parameters params;
2970         u8 *mac_addr = NULL;
2971
2972         memset(&params, 0, sizeof(params));
2973
2974         params.listen_interval = -1;
2975         params.plink_state = -1;
2976
2977         if (info->attrs[NL80211_ATTR_STA_AID])
2978                 return -EINVAL;
2979
2980         if (!info->attrs[NL80211_ATTR_MAC])
2981                 return -EINVAL;
2982
2983         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2984
2985         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
2986                 params.supported_rates =
2987                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2988                 params.supported_rates_len =
2989                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
2990         }
2991
2992         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
2993                 params.listen_interval =
2994                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
2995
2996         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
2997                 params.ht_capa =
2998                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
2999
3000         if (!rdev->ops->change_station)
3001                 return -EOPNOTSUPP;
3002
3003         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3004                 return -EINVAL;
3005
3006         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3007                 params.plink_action =
3008                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3009
3010         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3011                 params.plink_state =
3012                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3013
3014         switch (dev->ieee80211_ptr->iftype) {
3015         case NL80211_IFTYPE_AP:
3016         case NL80211_IFTYPE_AP_VLAN:
3017         case NL80211_IFTYPE_P2P_GO:
3018                 /* disallow mesh-specific things */
3019                 if (params.plink_action)
3020                         return -EINVAL;
3021
3022                 /* TDLS can't be set, ... */
3023                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3024                         return -EINVAL;
3025                 /*
3026                  * ... but don't bother the driver with it. This works around
3027                  * a hostapd/wpa_supplicant issue -- it always includes the
3028                  * TLDS_PEER flag in the mask even for AP mode.
3029                  */
3030                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3031
3032                 /* accept only the listed bits */
3033                 if (params.sta_flags_mask &
3034                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3035                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3036                                   BIT(NL80211_STA_FLAG_WME) |
3037                                   BIT(NL80211_STA_FLAG_MFP)))
3038                         return -EINVAL;
3039
3040                 /* must be last in here for error handling */
3041                 params.vlan = get_vlan(info, rdev);
3042                 if (IS_ERR(params.vlan))
3043                         return PTR_ERR(params.vlan);
3044                 break;
3045         case NL80211_IFTYPE_P2P_CLIENT:
3046         case NL80211_IFTYPE_STATION:
3047                 /*
3048                  * Don't allow userspace to change the TDLS_PEER flag,
3049                  * but silently ignore attempts to change it since we
3050                  * don't have state here to verify that it doesn't try
3051                  * to change the flag.
3052                  */
3053                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3054                 /* fall through */
3055         case NL80211_IFTYPE_ADHOC:
3056                 /* disallow things sta doesn't support */
3057                 if (params.plink_action)
3058                         return -EINVAL;
3059                 if (params.ht_capa)
3060                         return -EINVAL;
3061                 if (params.listen_interval >= 0)
3062                         return -EINVAL;
3063                 /* reject any changes other than AUTHORIZED */
3064                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3065                         return -EINVAL;
3066                 break;
3067         case NL80211_IFTYPE_MESH_POINT:
3068                 /* disallow things mesh doesn't support */
3069                 if (params.vlan)
3070                         return -EINVAL;
3071                 if (params.ht_capa)
3072                         return -EINVAL;
3073                 if (params.listen_interval >= 0)
3074                         return -EINVAL;
3075                 /*
3076                  * No special handling for TDLS here -- the userspace
3077                  * mesh code doesn't have this bug.
3078                  */
3079                 if (params.sta_flags_mask &
3080                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3081                                   BIT(NL80211_STA_FLAG_MFP) |
3082                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3083                         return -EINVAL;
3084                 break;
3085         default:
3086                 return -EOPNOTSUPP;
3087         }
3088
3089         /* be aware of params.vlan when changing code here */
3090
3091         err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
3092
3093         if (params.vlan)
3094                 dev_put(params.vlan);
3095
3096         return err;
3097 }
3098
3099 static struct nla_policy
3100 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3101         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3102         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3103 };
3104
3105 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3106 {
3107         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3108         int err;
3109         struct net_device *dev = info->user_ptr[1];
3110         struct station_parameters params;
3111         u8 *mac_addr = NULL;
3112
3113         memset(&params, 0, sizeof(params));
3114
3115         if (!info->attrs[NL80211_ATTR_MAC])
3116                 return -EINVAL;
3117
3118         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3119                 return -EINVAL;
3120
3121         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3122                 return -EINVAL;
3123
3124         if (!info->attrs[NL80211_ATTR_STA_AID])
3125                 return -EINVAL;
3126
3127         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3128         params.supported_rates =
3129                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3130         params.supported_rates_len =
3131                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3132         params.listen_interval =
3133                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3134
3135         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3136         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3137                 return -EINVAL;
3138
3139         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3140                 params.ht_capa =
3141                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3142
3143         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3144                 params.plink_action =
3145                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3146
3147         if (!rdev->ops->add_station)
3148                 return -EOPNOTSUPP;
3149
3150         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3151                 return -EINVAL;
3152
3153         switch (dev->ieee80211_ptr->iftype) {
3154         case NL80211_IFTYPE_AP:
3155         case NL80211_IFTYPE_AP_VLAN:
3156         case NL80211_IFTYPE_P2P_GO:
3157                 /* parse WME attributes if sta is WME capable */
3158                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3159                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3160                     info->attrs[NL80211_ATTR_STA_WME]) {
3161                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3162                         struct nlattr *nla;
3163
3164                         nla = info->attrs[NL80211_ATTR_STA_WME];
3165                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3166                                                nl80211_sta_wme_policy);
3167                         if (err)
3168                                 return err;
3169
3170                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3171                                 params.uapsd_queues =
3172                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3173                         if (params.uapsd_queues &
3174                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3175                                 return -EINVAL;
3176
3177                         if (tb[NL80211_STA_WME_MAX_SP])
3178                                 params.max_sp =
3179                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3180
3181                         if (params.max_sp &
3182                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3183                                 return -EINVAL;
3184
3185                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3186                 }
3187                 /* TDLS peers cannot be added */
3188                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3189                         return -EINVAL;
3190                 /* but don't bother the driver with it */
3191                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3192
3193                 /* must be last in here for error handling */
3194                 params.vlan = get_vlan(info, rdev);
3195                 if (IS_ERR(params.vlan))
3196                         return PTR_ERR(params.vlan);
3197                 break;
3198         case NL80211_IFTYPE_MESH_POINT:
3199                 /* TDLS peers cannot be added */
3200                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3201                         return -EINVAL;
3202                 break;
3203         case NL80211_IFTYPE_STATION:
3204                 /* Only TDLS peers can be added */
3205                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3206                         return -EINVAL;
3207                 /* Can only add if TDLS ... */
3208                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3209                         return -EOPNOTSUPP;
3210                 /* ... with external setup is supported */
3211                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3212                         return -EOPNOTSUPP;
3213                 break;
3214         default:
3215                 return -EOPNOTSUPP;
3216         }
3217
3218         /* be aware of params.vlan when changing code here */
3219
3220         err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
3221
3222         if (params.vlan)
3223                 dev_put(params.vlan);
3224         return err;
3225 }
3226
3227 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3228 {
3229         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3230         struct net_device *dev = info->user_ptr[1];
3231         u8 *mac_addr = NULL;
3232
3233         if (info->attrs[NL80211_ATTR_MAC])
3234                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3235
3236         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3237             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3238             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3239             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3240                 return -EINVAL;
3241
3242         if (!rdev->ops->del_station)
3243                 return -EOPNOTSUPP;
3244
3245         return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
3246 }
3247
3248 static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
3249                                 int flags, struct net_device *dev,
3250                                 u8 *dst, u8 *next_hop,
3251                                 struct mpath_info *pinfo)
3252 {
3253         void *hdr;
3254         struct nlattr *pinfoattr;
3255
3256         hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
3257         if (!hdr)
3258                 return -1;
3259
3260         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3261             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3262             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3263             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3264                 goto nla_put_failure;
3265
3266         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3267         if (!pinfoattr)
3268                 goto nla_put_failure;
3269         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3270             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3271                         pinfo->frame_qlen))
3272                 goto nla_put_failure;
3273         if (((pinfo->filled & MPATH_INFO_SN) &&
3274              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3275             ((pinfo->filled & MPATH_INFO_METRIC) &&
3276              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3277                          pinfo->metric)) ||
3278             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3279              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3280                          pinfo->exptime)) ||
3281             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3282              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3283                         pinfo->flags)) ||
3284             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3285              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3286                          pinfo->discovery_timeout)) ||
3287             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3288              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3289                         pinfo->discovery_retries)))
3290                 goto nla_put_failure;
3291
3292         nla_nest_end(msg, pinfoattr);
3293
3294         return genlmsg_end(msg, hdr);
3295
3296  nla_put_failure:
3297         genlmsg_cancel(msg, hdr);
3298         return -EMSGSIZE;
3299 }
3300
3301 static int nl80211_dump_mpath(struct sk_buff *skb,
3302                               struct netlink_callback *cb)
3303 {
3304         struct mpath_info pinfo;
3305         struct cfg80211_registered_device *dev;
3306         struct net_device *netdev;
3307         u8 dst[ETH_ALEN];
3308         u8 next_hop[ETH_ALEN];
3309         int path_idx = cb->args[1];
3310         int err;
3311
3312         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3313         if (err)
3314                 return err;
3315
3316         if (!dev->ops->dump_mpath) {
3317                 err = -EOPNOTSUPP;
3318                 goto out_err;
3319         }
3320
3321         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3322                 err = -EOPNOTSUPP;
3323                 goto out_err;
3324         }
3325
3326         while (1) {
3327                 err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
3328                                            dst, next_hop, &pinfo);
3329                 if (err == -ENOENT)
3330                         break;
3331                 if (err)
3332                         goto out_err;
3333
3334                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
3335                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3336                                        netdev, dst, next_hop,
3337                                        &pinfo) < 0)
3338                         goto out;
3339
3340                 path_idx++;
3341         }
3342
3343
3344  out:
3345         cb->args[1] = path_idx;
3346         err = skb->len;
3347  out_err:
3348         nl80211_finish_netdev_dump(dev);
3349         return err;
3350 }
3351
3352 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3353 {
3354         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3355         int err;
3356         struct net_device *dev = info->user_ptr[1];
3357         struct mpath_info pinfo;
3358         struct sk_buff *msg;
3359         u8 *dst = NULL;
3360         u8 next_hop[ETH_ALEN];
3361
3362         memset(&pinfo, 0, sizeof(pinfo));
3363
3364         if (!info->attrs[NL80211_ATTR_MAC])
3365                 return -EINVAL;
3366
3367         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3368
3369         if (!rdev->ops->get_mpath)
3370                 return -EOPNOTSUPP;
3371
3372         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3373                 return -EOPNOTSUPP;
3374
3375         err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
3376         if (err)
3377                 return err;
3378
3379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3380         if (!msg)
3381                 return -ENOMEM;
3382
3383         if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
3384                                  dev, dst, next_hop, &pinfo) < 0) {
3385                 nlmsg_free(msg);
3386                 return -ENOBUFS;
3387         }
3388
3389         return genlmsg_reply(msg, info);
3390 }
3391
3392 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3393 {
3394         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3395         struct net_device *dev = info->user_ptr[1];
3396         u8 *dst = NULL;
3397         u8 *next_hop = NULL;
3398
3399         if (!info->attrs[NL80211_ATTR_MAC])
3400                 return -EINVAL;
3401
3402         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3403                 return -EINVAL;
3404
3405         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3406         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3407
3408         if (!rdev->ops->change_mpath)
3409                 return -EOPNOTSUPP;
3410
3411         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3412                 return -EOPNOTSUPP;
3413
3414         return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
3415 }
3416
3417 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3418 {
3419         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3420         struct net_device *dev = info->user_ptr[1];
3421         u8 *dst = NULL;
3422         u8 *next_hop = NULL;
3423
3424         if (!info->attrs[NL80211_ATTR_MAC])
3425                 return -EINVAL;
3426
3427         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3428                 return -EINVAL;
3429
3430         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3431         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3432
3433         if (!rdev->ops->add_mpath)
3434                 return -EOPNOTSUPP;
3435
3436         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3437                 return -EOPNOTSUPP;
3438
3439         return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
3440 }
3441
3442 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3443 {
3444         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3445         struct net_device *dev = info->user_ptr[1];
3446         u8 *dst = NULL;
3447
3448         if (info->attrs[NL80211_ATTR_MAC])
3449                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3450
3451         if (!rdev->ops->del_mpath)
3452                 return -EOPNOTSUPP;
3453
3454         return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
3455 }
3456
3457 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3458 {
3459         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3460         struct net_device *dev = info->user_ptr[1];
3461         struct bss_parameters params;
3462
3463         memset(&params, 0, sizeof(params));
3464         /* default to not changing parameters */
3465         params.use_cts_prot = -1;
3466         params.use_short_preamble = -1;
3467         params.use_short_slot_time = -1;
3468         params.ap_isolate = -1;
3469         params.ht_opmode = -1;
3470
3471         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3472                 params.use_cts_prot =
3473                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3474         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3475                 params.use_short_preamble =
3476                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3477         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3478                 params.use_short_slot_time =
3479                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3480         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3481                 params.basic_rates =
3482                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3483                 params.basic_rates_len =
3484                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3485         }
3486         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3487                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3488         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3489                 params.ht_opmode =
3490                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3491
3492         if (!rdev->ops->change_bss)
3493                 return -EOPNOTSUPP;
3494
3495         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3496             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3497                 return -EOPNOTSUPP;
3498
3499         return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
3500 }
3501
3502 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3503         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3504         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3505         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3506         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3507         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3508         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3509 };
3510
3511 static int parse_reg_rule(struct nlattr *tb[],
3512         struct ieee80211_reg_rule *reg_rule)
3513 {
3514         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3515         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3516
3517         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3518                 return -EINVAL;
3519         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3520                 return -EINVAL;
3521         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3522                 return -EINVAL;
3523         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3524                 return -EINVAL;
3525         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3526                 return -EINVAL;
3527
3528         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3529
3530         freq_range->start_freq_khz =
3531                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3532         freq_range->end_freq_khz =
3533                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3534         freq_range->max_bandwidth_khz =
3535                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3536
3537         power_rule->max_eirp =
3538                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3539
3540         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3541                 power_rule->max_antenna_gain =
3542                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3543
3544         return 0;
3545 }
3546
3547 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3548 {
3549         int r;
3550         char *data = NULL;
3551
3552         /*
3553          * You should only get this when cfg80211 hasn't yet initialized
3554          * completely when built-in to the kernel right between the time
3555          * window between nl80211_init() and regulatory_init(), if that is
3556          * even possible.
3557          */
3558         mutex_lock(&cfg80211_mutex);
3559         if (unlikely(!cfg80211_regdomain)) {
3560                 mutex_unlock(&cfg80211_mutex);
3561                 return -EINPROGRESS;
3562         }
3563         mutex_unlock(&cfg80211_mutex);
3564
3565         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3566                 return -EINVAL;
3567
3568         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3569
3570         r = regulatory_hint_user(data);
3571
3572         return r;
3573 }
3574
3575 static int nl80211_get_mesh_config(struct sk_buff *skb,
3576                                    struct genl_info *info)
3577 {
3578         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3579         struct net_device *dev = info->user_ptr[1];
3580         struct wireless_dev *wdev = dev->ieee80211_ptr;
3581         struct mesh_config cur_params;
3582         int err = 0;
3583         void *hdr;
3584         struct nlattr *pinfoattr;
3585         struct sk_buff *msg;
3586
3587         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3588                 return -EOPNOTSUPP;
3589
3590         if (!rdev->ops->get_mesh_config)
3591                 return -EOPNOTSUPP;
3592
3593         wdev_lock(wdev);
3594         /* If not connected, get default parameters */
3595         if (!wdev->mesh_id_len)
3596                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3597         else
3598                 err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
3599                                                  &cur_params);
3600         wdev_unlock(wdev);
3601
3602         if (err)
3603                 return err;
3604
3605         /* Draw up a netlink message to send back */
3606         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3607         if (!msg)
3608                 return -ENOMEM;
3609         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3610                              NL80211_CMD_GET_MESH_CONFIG);
3611         if (!hdr)
3612                 goto out;
3613         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3614         if (!pinfoattr)
3615                 goto nla_put_failure;
3616         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3617             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3618                         cur_params.dot11MeshRetryTimeout) ||
3619             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3620                         cur_params.dot11MeshConfirmTimeout) ||
3621             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3622                         cur_params.dot11MeshHoldingTimeout) ||
3623             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3624                         cur_params.dot11MeshMaxPeerLinks) ||
3625             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3626                        cur_params.dot11MeshMaxRetries) ||
3627             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3628                        cur_params.dot11MeshTTL) ||
3629             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3630                        cur_params.element_ttl) ||
3631             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3632                        cur_params.auto_open_plinks) ||
3633             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3634                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3635             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3636                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3637             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3638                         cur_params.path_refresh_time) ||
3639             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3640                         cur_params.min_discovery_timeout) ||
3641             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3642                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3643             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3644                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3645             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3646                         cur_params.dot11MeshHWMPperrMinInterval) ||
3647             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3648                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3649             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3650                        cur_params.dot11MeshHWMPRootMode) ||
3651             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3652                         cur_params.dot11MeshHWMPRannInterval) ||
3653             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3654                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3655             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3656                        cur_params.dot11MeshForwarding) ||
3657             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3658                         cur_params.rssi_threshold) ||
3659             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3660                         cur_params.ht_opmode) ||
3661             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3662                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3663             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3664                         cur_params.dot11MeshHWMProotInterval) ||
3665             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3666                         cur_params.dot11MeshHWMPconfirmationInterval))
3667                 goto nla_put_failure;
3668         nla_nest_end(msg, pinfoattr);
3669         genlmsg_end(msg, hdr);
3670         return genlmsg_reply(msg, info);
3671
3672  nla_put_failure:
3673         genlmsg_cancel(msg, hdr);
3674  out:
3675         nlmsg_free(msg);
3676         return -ENOBUFS;
3677 }
3678
3679 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3680         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3681         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3682         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3683         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3684         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3685         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3686         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3687         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3688         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3689         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3690         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3691         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3692         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3693         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3694         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3695         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3696         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3697         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3698         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3699         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3700         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3701         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3702         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3703         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3704         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3705 };
3706
3707 static const struct nla_policy
3708         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3709         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3710         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3711         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3712         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3713         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3714                                     .len = IEEE80211_MAX_DATA_LEN },
3715         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3716 };
3717
3718 static int nl80211_parse_mesh_config(struct genl_info *info,
3719                                      struct mesh_config *cfg,
3720                                      u32 *mask_out)
3721 {
3722         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3723         u32 mask = 0;
3724
3725 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3726 do {\
3727         if (table[attr_num]) {\
3728                 cfg->param = nla_fn(table[attr_num]); \
3729                 mask |= (1 << (attr_num - 1)); \
3730         } \
3731 } while (0);\
3732
3733
3734         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
3735                 return -EINVAL;
3736         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
3737                              info->attrs[NL80211_ATTR_MESH_CONFIG],
3738                              nl80211_meshconf_params_policy))
3739                 return -EINVAL;
3740
3741         /* This makes sure that there aren't more than 32 mesh config
3742          * parameters (otherwise our bitfield scheme would not work.) */
3743         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
3744
3745         /* Fill in the params struct */
3746         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
3747                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
3748                                   nla_get_u16);
3749         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
3750                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3751                                   nla_get_u16);
3752         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
3753                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
3754                                   nla_get_u16);
3755         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
3756                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
3757                                   nla_get_u16);
3758         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
3759                                   mask, NL80211_MESHCONF_MAX_RETRIES,
3760                                   nla_get_u8);
3761         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
3762                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
3763         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
3764                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
3765                                   nla_get_u8);
3766         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
3767                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3768                                   nla_get_u8);
3769         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
3770                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3771                                   nla_get_u32);
3772         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
3773                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3774                                   nla_get_u8);
3775         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
3776                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
3777                                   nla_get_u32);
3778         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
3779                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3780                                   nla_get_u16);
3781         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
3782                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3783                                   nla_get_u32);
3784         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
3785                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3786                                   nla_get_u16);
3787         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
3788                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3789                                   nla_get_u16);
3790         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3791                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
3792                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3793                                   nla_get_u16);
3794         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
3795                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
3796         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
3797                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3798                                   nla_get_u16);
3799         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3800                                   dot11MeshGateAnnouncementProtocol, mask,
3801                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3802                                   nla_get_u8);
3803         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
3804                                   mask, NL80211_MESHCONF_FORWARDING,
3805                                   nla_get_u8);
3806         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
3807                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
3808                                   nla_get_u32);
3809         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
3810                                   mask, NL80211_MESHCONF_HT_OPMODE,
3811                                   nla_get_u16);
3812         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
3813                                   mask,
3814                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3815                                   nla_get_u32);
3816         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
3817                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3818                                   nla_get_u16);
3819         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
3820                                   dot11MeshHWMPconfirmationInterval, mask,
3821                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3822                                   nla_get_u16);
3823         if (mask_out)
3824                 *mask_out = mask;
3825
3826         return 0;
3827
3828 #undef FILL_IN_MESH_PARAM_IF_SET
3829 }
3830
3831 static int nl80211_parse_mesh_setup(struct genl_info *info,
3832                                      struct mesh_setup *setup)
3833 {
3834         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
3835
3836         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
3837                 return -EINVAL;
3838         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
3839                              info->attrs[NL80211_ATTR_MESH_SETUP],
3840                              nl80211_mesh_setup_params_policy))
3841                 return -EINVAL;
3842
3843         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
3844                 setup->sync_method =
3845                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
3846                  IEEE80211_SYNC_METHOD_VENDOR :
3847                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
3848
3849         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
3850                 setup->path_sel_proto =
3851                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
3852                  IEEE80211_PATH_PROTOCOL_VENDOR :
3853                  IEEE80211_PATH_PROTOCOL_HWMP;
3854
3855         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
3856                 setup->path_metric =
3857                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
3858                  IEEE80211_PATH_METRIC_VENDOR :
3859                  IEEE80211_PATH_METRIC_AIRTIME;
3860
3861
3862         if (tb[NL80211_MESH_SETUP_IE]) {
3863                 struct nlattr *ieattr =
3864                         tb[NL80211_MESH_SETUP_IE];
3865                 if (!is_valid_ie_attr(ieattr))
3866                         return -EINVAL;
3867                 setup->ie = nla_data(ieattr);
3868                 setup->ie_len = nla_len(ieattr);
3869         }
3870         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
3871         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
3872
3873         return 0;
3874 }
3875
3876 static int nl80211_update_mesh_config(struct sk_buff *skb,
3877                                       struct genl_info *info)
3878 {
3879         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3880         struct net_device *dev = info->user_ptr[1];
3881         struct wireless_dev *wdev = dev->ieee80211_ptr;
3882         struct mesh_config cfg;
3883         u32 mask;
3884         int err;
3885
3886         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3887                 return -EOPNOTSUPP;
3888
3889         if (!rdev->ops->update_mesh_config)
3890                 return -EOPNOTSUPP;
3891
3892         err = nl80211_parse_mesh_config(info, &cfg, &mask);
3893         if (err)
3894                 return err;
3895
3896         wdev_lock(wdev);
3897         if (!wdev->mesh_id_len)
3898                 err = -ENOLINK;
3899
3900         if (!err)
3901                 err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
3902                                                     mask, &cfg);
3903
3904         wdev_unlock(wdev);
3905
3906         return err;
3907 }
3908
3909 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
3910 {
3911         struct sk_buff *msg;
3912         void *hdr = NULL;
3913         struct nlattr *nl_reg_rules;
3914         unsigned int i;
3915         int err = -EINVAL;
3916
3917         mutex_lock(&cfg80211_mutex);
3918
3919         if (!cfg80211_regdomain)
3920                 goto out;
3921
3922         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3923         if (!msg) {
3924                 err = -ENOBUFS;
3925                 goto out;
3926         }
3927
3928         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
3929                              NL80211_CMD_GET_REG);
3930         if (!hdr)
3931                 goto put_failure;
3932
3933         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
3934                            cfg80211_regdomain->alpha2) ||
3935             (cfg80211_regdomain->dfs_region &&
3936              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
3937                         cfg80211_regdomain->dfs_region)))
3938                 goto nla_put_failure;
3939
3940         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
3941         if (!nl_reg_rules)
3942                 goto nla_put_failure;
3943
3944         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
3945                 struct nlattr *nl_reg_rule;
3946                 const struct ieee80211_reg_rule *reg_rule;
3947                 const struct ieee80211_freq_range *freq_range;
3948                 const struct ieee80211_power_rule *power_rule;
3949
3950                 reg_rule = &cfg80211_regdomain->reg_rules[i];
3951                 freq_range = &reg_rule->freq_range;
3952                 power_rule = &reg_rule->power_rule;
3953
3954                 nl_reg_rule = nla_nest_start(msg, i);
3955                 if (!nl_reg_rule)
3956                         goto nla_put_failure;
3957
3958                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
3959                                 reg_rule->flags) ||
3960                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
3961                                 freq_range->start_freq_khz) ||
3962                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
3963                                 freq_range->end_freq_khz) ||
3964                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
3965                                 freq_range->max_bandwidth_khz) ||
3966                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
3967                                 power_rule->max_antenna_gain) ||
3968                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
3969                                 power_rule->max_eirp))
3970                         goto nla_put_failure;
3971
3972                 nla_nest_end(msg, nl_reg_rule);
3973         }
3974
3975         nla_nest_end(msg, nl_reg_rules);
3976
3977         genlmsg_end(msg, hdr);
3978         err = genlmsg_reply(msg, info);
3979         goto out;
3980
3981 nla_put_failure:
3982         genlmsg_cancel(msg, hdr);
3983 put_failure:
3984         nlmsg_free(msg);
3985         err = -EMSGSIZE;
3986 out:
3987         mutex_unlock(&cfg80211_mutex);
3988         return err;
3989 }
3990
3991 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
3992 {
3993         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
3994         struct nlattr *nl_reg_rule;
3995         char *alpha2 = NULL;
3996         int rem_reg_rules = 0, r = 0;
3997         u32 num_rules = 0, rule_idx = 0, size_of_regd;
3998         u8 dfs_region = 0;
3999         struct ieee80211_regdomain *rd = NULL;
4000
4001         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4002                 return -EINVAL;
4003
4004         if (!info->attrs[NL80211_ATTR_REG_RULES])
4005                 return -EINVAL;
4006
4007         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4008
4009         if (info->attrs[NL80211_ATTR_DFS_REGION])
4010                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4011
4012         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4013                         rem_reg_rules) {
4014                 num_rules++;
4015                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4016                         return -EINVAL;
4017         }
4018
4019         mutex_lock(&cfg80211_mutex);
4020
4021         if (!reg_is_valid_request(alpha2)) {
4022                 r = -EINVAL;
4023                 goto bad_reg;
4024         }
4025
4026         size_of_regd = sizeof(struct ieee80211_regdomain) +
4027                 (num_rules * sizeof(struct ieee80211_reg_rule));
4028
4029         rd = kzalloc(size_of_regd, GFP_KERNEL);
4030         if (!rd) {
4031                 r = -ENOMEM;
4032                 goto bad_reg;
4033         }
4034
4035         rd->n_reg_rules = num_rules;
4036         rd->alpha2[0] = alpha2[0];
4037         rd->alpha2[1] = alpha2[1];
4038
4039         /*
4040          * Disable DFS master mode if the DFS region was
4041          * not supported or known on this kernel.
4042          */
4043         if (reg_supported_dfs_region(dfs_region))
4044                 rd->dfs_region = dfs_region;
4045
4046         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4047                         rem_reg_rules) {
4048                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4049                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4050                         reg_rule_policy);
4051                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4052                 if (r)
4053                         goto bad_reg;
4054
4055                 rule_idx++;
4056
4057                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4058                         r = -EINVAL;
4059                         goto bad_reg;
4060                 }
4061         }
4062
4063         BUG_ON(rule_idx != num_rules);
4064
4065         r = set_regdom(rd);
4066
4067         mutex_unlock(&cfg80211_mutex);
4068
4069         return r;
4070
4071  bad_reg:
4072         mutex_unlock(&cfg80211_mutex);
4073         kfree(rd);
4074         return r;
4075 }
4076
4077 static int validate_scan_freqs(struct nlattr *freqs)
4078 {
4079         struct nlattr *attr1, *attr2;
4080         int n_channels = 0, tmp1, tmp2;
4081
4082         nla_for_each_nested(attr1, freqs, tmp1) {
4083                 n_channels++;
4084                 /*
4085                  * Some hardware has a limited channel list for
4086                  * scanning, and it is pretty much nonsensical
4087                  * to scan for a channel twice, so disallow that
4088                  * and don't require drivers to check that the
4089                  * channel list they get isn't longer than what
4090                  * they can scan, as long as they can scan all
4091                  * the channels they registered at once.
4092                  */
4093                 nla_for_each_nested(attr2, freqs, tmp2)
4094                         if (attr1 != attr2 &&
4095                             nla_get_u32(attr1) == nla_get_u32(attr2))
4096                                 return 0;
4097         }
4098
4099         return n_channels;
4100 }
4101
4102 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4103 {
4104         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4105         struct net_device *dev = info->user_ptr[1];
4106         struct cfg80211_scan_request *request;
4107         struct nlattr *attr;
4108         struct wiphy *wiphy;
4109         int err, tmp, n_ssids = 0, n_channels, i;
4110         size_t ie_len;
4111
4112         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4113                 return -EINVAL;
4114
4115         wiphy = &rdev->wiphy;
4116
4117         if (!rdev->ops->scan)
4118                 return -EOPNOTSUPP;
4119
4120         if (rdev->scan_req)
4121                 return -EBUSY;
4122
4123         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4124                 n_channels = validate_scan_freqs(
4125                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4126                 if (!n_channels)
4127                         return -EINVAL;
4128         } else {
4129                 enum ieee80211_band band;
4130                 n_channels = 0;
4131
4132                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4133                         if (wiphy->bands[band])
4134                                 n_channels += wiphy->bands[band]->n_channels;
4135         }
4136
4137         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4138                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4139                         n_ssids++;
4140
4141         if (n_ssids > wiphy->max_scan_ssids)
4142                 return -EINVAL;
4143
4144         if (info->attrs[NL80211_ATTR_IE])
4145                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4146         else
4147                 ie_len = 0;
4148
4149         if (ie_len > wiphy->max_scan_ie_len)
4150                 return -EINVAL;
4151
4152         request = kzalloc(sizeof(*request)
4153                         + sizeof(*request->ssids) * n_ssids
4154                         + sizeof(*request->channels) * n_channels
4155                         + ie_len, GFP_KERNEL);
4156         if (!request)
4157                 return -ENOMEM;
4158
4159         if (n_ssids)
4160                 request->ssids = (void *)&request->channels[n_channels];
4161         request->n_ssids = n_ssids;
4162         if (ie_len) {
4163                 if (request->ssids)
4164                         request->ie = (void *)(request->ssids + n_ssids);
4165                 else
4166                         request->ie = (void *)(request->channels + n_channels);
4167         }
4168
4169         i = 0;
4170         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4171                 /* user specified, bail out if channel not found */
4172                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4173                         struct ieee80211_channel *chan;
4174
4175                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4176
4177                         if (!chan) {
4178                                 err = -EINVAL;
4179                                 goto out_free;
4180                         }
4181
4182                         /* ignore disabled channels */
4183                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4184                                 continue;
4185
4186                         request->channels[i] = chan;
4187                         i++;
4188                 }
4189         } else {
4190                 enum ieee80211_band band;
4191
4192                 /* all channels */
4193                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4194                         int j;
4195                         if (!wiphy->bands[band])
4196                                 continue;
4197                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4198                                 struct ieee80211_channel *chan;
4199
4200                                 chan = &wiphy->bands[band]->channels[j];
4201
4202                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4203                                         continue;
4204
4205                                 request->channels[i] = chan;
4206                                 i++;
4207                         }
4208                 }
4209         }
4210
4211         if (!i) {
4212                 err = -EINVAL;
4213                 goto out_free;
4214         }
4215
4216         request->n_channels = i;
4217
4218         i = 0;
4219         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4220                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4221                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4222                                 err = -EINVAL;
4223                                 goto out_free;
4224                         }
4225                         request->ssids[i].ssid_len = nla_len(attr);
4226                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4227                         i++;
4228                 }
4229         }
4230
4231         if (info->attrs[NL80211_ATTR_IE]) {
4232                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4233                 memcpy((void *)request->ie,
4234                        nla_data(info->attrs[NL80211_ATTR_IE]),
4235                        request->ie_len);
4236         }
4237
4238         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4239                 if (wiphy->bands[i])
4240                         request->rates[i] =
4241                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4242
4243         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4244                 nla_for_each_nested(attr,
4245                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4246                                     tmp) {
4247                         enum ieee80211_band band = nla_type(attr);
4248
4249                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4250                                 err = -EINVAL;
4251                                 goto out_free;
4252                         }
4253                         err = ieee80211_get_ratemask(wiphy->bands[band],
4254                                                      nla_data(attr),
4255                                                      nla_len(attr),
4256                                                      &request->rates[band]);
4257                         if (err)
4258                                 goto out_free;
4259                 }
4260         }
4261
4262         request->no_cck =
4263                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4264
4265         request->dev = dev;
4266         request->wiphy = &rdev->wiphy;
4267
4268         rdev->scan_req = request;
4269         err = rdev->ops->scan(&rdev->wiphy, dev, request);
4270
4271         if (!err) {
4272                 nl80211_send_scan_start(rdev, dev);
4273                 dev_hold(dev);
4274         } else {
4275  out_free:
4276                 rdev->scan_req = NULL;
4277                 kfree(request);
4278         }
4279
4280         return err;
4281 }
4282
4283 static int nl80211_start_sched_scan(struct sk_buff *skb,
4284                                     struct genl_info *info)
4285 {
4286         struct cfg80211_sched_scan_request *request;
4287         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4288         struct net_device *dev = info->user_ptr[1];
4289         struct nlattr *attr;
4290         struct wiphy *wiphy;
4291         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4292         u32 interval;
4293         enum ieee80211_band band;
4294         size_t ie_len;
4295         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4296
4297         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4298             !rdev->ops->sched_scan_start)
4299                 return -EOPNOTSUPP;
4300
4301         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4302                 return -EINVAL;
4303
4304         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4305                 return -EINVAL;
4306
4307         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4308         if (interval == 0)
4309                 return -EINVAL;
4310
4311         wiphy = &rdev->wiphy;
4312
4313         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4314                 n_channels = validate_scan_freqs(
4315                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4316                 if (!n_channels)
4317                         return -EINVAL;
4318         } else {
4319                 n_channels = 0;
4320
4321                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4322                         if (wiphy->bands[band])
4323                                 n_channels += wiphy->bands[band]->n_channels;
4324         }
4325
4326         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4327                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4328                                     tmp)
4329                         n_ssids++;
4330
4331         if (n_ssids > wiphy->max_sched_scan_ssids)
4332                 return -EINVAL;
4333
4334         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4335                 nla_for_each_nested(attr,
4336                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4337                                     tmp)
4338                         n_match_sets++;
4339
4340         if (n_match_sets > wiphy->max_match_sets)
4341                 return -EINVAL;
4342
4343         if (info->attrs[NL80211_ATTR_IE])
4344                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4345         else
4346                 ie_len = 0;
4347
4348         if (ie_len > wiphy->max_sched_scan_ie_len)
4349                 return -EINVAL;
4350
4351         mutex_lock(&rdev->sched_scan_mtx);
4352
4353         if (rdev->sched_scan_req) {
4354                 err = -EINPROGRESS;
4355                 goto out;
4356         }
4357
4358         request = kzalloc(sizeof(*request)
4359                         + sizeof(*request->ssids) * n_ssids
4360                         + sizeof(*request->match_sets) * n_match_sets
4361                         + sizeof(*request->channels) * n_channels
4362                         + ie_len, GFP_KERNEL);
4363         if (!request) {
4364                 err = -ENOMEM;
4365                 goto out;
4366         }
4367
4368         if (n_ssids)
4369                 request->ssids = (void *)&request->channels[n_channels];
4370         request->n_ssids = n_ssids;
4371         if (ie_len) {
4372                 if (request->ssids)
4373                         request->ie = (void *)(request->ssids + n_ssids);
4374                 else
4375                         request->ie = (void *)(request->channels + n_channels);
4376         }
4377
4378         if (n_match_sets) {
4379                 if (request->ie)
4380                         request->match_sets = (void *)(request->ie + ie_len);
4381                 else if (request->ssids)
4382                         request->match_sets =
4383                                 (void *)(request->ssids + n_ssids);
4384                 else
4385                         request->match_sets =
4386                                 (void *)(request->channels + n_channels);
4387         }
4388         request->n_match_sets = n_match_sets;
4389
4390         i = 0;
4391         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4392                 /* user specified, bail out if channel not found */
4393                 nla_for_each_nested(attr,
4394                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4395                                     tmp) {
4396                         struct ieee80211_channel *chan;
4397
4398                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4399
4400                         if (!chan) {
4401                                 err = -EINVAL;
4402                                 goto out_free;
4403                         }
4404
4405                         /* ignore disabled channels */
4406                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4407                                 continue;
4408
4409                         request->channels[i] = chan;
4410                         i++;
4411                 }
4412         } else {
4413                 /* all channels */
4414                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4415                         int j;
4416                         if (!wiphy->bands[band])
4417                                 continue;
4418                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4419                                 struct ieee80211_channel *chan;
4420
4421                                 chan = &wiphy->bands[band]->channels[j];
4422
4423                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4424                                         continue;
4425
4426                                 request->channels[i] = chan;
4427                                 i++;
4428                         }
4429                 }
4430         }
4431
4432         if (!i) {
4433                 err = -EINVAL;
4434                 goto out_free;
4435         }
4436
4437         request->n_channels = i;
4438
4439         i = 0;
4440         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4441                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4442                                     tmp) {
4443                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4444                                 err = -EINVAL;
4445                                 goto out_free;
4446                         }
4447                         request->ssids[i].ssid_len = nla_len(attr);
4448                         memcpy(request->ssids[i].ssid, nla_data(attr),
4449                                nla_len(attr));
4450                         i++;
4451                 }
4452         }
4453
4454         i = 0;
4455         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4456                 nla_for_each_nested(attr,
4457                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4458                                     tmp) {
4459                         struct nlattr *ssid, *rssi;
4460
4461                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4462                                   nla_data(attr), nla_len(attr),
4463                                   nl80211_match_policy);
4464                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4465                         if (ssid) {
4466                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4467                                         err = -EINVAL;
4468                                         goto out_free;
4469                                 }
4470                                 memcpy(request->match_sets[i].ssid.ssid,
4471                                        nla_data(ssid), nla_len(ssid));
4472                                 request->match_sets[i].ssid.ssid_len =
4473                                         nla_len(ssid);
4474                         }
4475                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4476                         if (rssi)
4477                                 request->rssi_thold = nla_get_u32(rssi);
4478                         else
4479                                 request->rssi_thold =
4480                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4481                         i++;
4482                 }
4483         }
4484
4485         if (info->attrs[NL80211_ATTR_IE]) {
4486                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4487                 memcpy((void *)request->ie,
4488                        nla_data(info->attrs[NL80211_ATTR_IE]),
4489                        request->ie_len);
4490         }
4491
4492         request->dev = dev;
4493         request->wiphy = &rdev->wiphy;
4494         request->interval = interval;
4495
4496         err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
4497         if (!err) {
4498                 rdev->sched_scan_req = request;
4499                 nl80211_send_sched_scan(rdev, dev,
4500                                         NL80211_CMD_START_SCHED_SCAN);
4501                 goto out;
4502         }
4503
4504 out_free:
4505         kfree(request);
4506 out:
4507         mutex_unlock(&rdev->sched_scan_mtx);
4508         return err;
4509 }
4510
4511 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4512                                    struct genl_info *info)
4513 {
4514         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4515         int err;
4516
4517         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4518             !rdev->ops->sched_scan_stop)
4519                 return -EOPNOTSUPP;
4520
4521         mutex_lock(&rdev->sched_scan_mtx);
4522         err = __cfg80211_stop_sched_scan(rdev, false);
4523         mutex_unlock(&rdev->sched_scan_mtx);
4524
4525         return err;
4526 }
4527
4528 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4529                             u32 seq, int flags,
4530                             struct cfg80211_registered_device *rdev,
4531                             struct wireless_dev *wdev,
4532                             struct cfg80211_internal_bss *intbss)
4533 {
4534         struct cfg80211_bss *res = &intbss->pub;
4535         void *hdr;
4536         struct nlattr *bss;
4537
4538         ASSERT_WDEV_LOCK(wdev);
4539
4540         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
4541                              NL80211_CMD_NEW_SCAN_RESULTS);
4542         if (!hdr)
4543                 return -1;
4544
4545         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4546
4547         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4548             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4549                 goto nla_put_failure;
4550
4551         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4552         if (!bss)
4553                 goto nla_put_failure;
4554         if ((!is_zero_ether_addr(res->bssid) &&
4555              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4556             (res->information_elements && res->len_information_elements &&
4557              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4558                      res->len_information_elements,
4559                      res->information_elements)) ||
4560             (res->beacon_ies && res->len_beacon_ies &&
4561              res->beacon_ies != res->information_elements &&
4562              nla_put(msg, NL80211_BSS_BEACON_IES,
4563                      res->len_beacon_ies, res->beacon_ies)))
4564                 goto nla_put_failure;
4565         if (res->tsf &&
4566             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4567                 goto nla_put_failure;
4568         if (res->beacon_interval &&
4569             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4570                 goto nla_put_failure;
4571         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4572             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4573             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4574                         jiffies_to_msecs(jiffies - intbss->ts)))
4575                 goto nla_put_failure;
4576
4577         switch (rdev->wiphy.signal_type) {
4578         case CFG80211_SIGNAL_TYPE_MBM:
4579                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4580                         goto nla_put_failure;
4581                 break;
4582         case CFG80211_SIGNAL_TYPE_UNSPEC:
4583                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4584                         goto nla_put_failure;
4585                 break;
4586         default:
4587                 break;
4588         }
4589
4590         switch (wdev->iftype) {
4591         case NL80211_IFTYPE_P2P_CLIENT:
4592         case NL80211_IFTYPE_STATION:
4593                 if (intbss == wdev->current_bss &&
4594                     nla_put_u32(msg, NL80211_BSS_STATUS,
4595                                 NL80211_BSS_STATUS_ASSOCIATED))
4596                         goto nla_put_failure;
4597                 break;
4598         case NL80211_IFTYPE_ADHOC:
4599                 if (intbss == wdev->current_bss &&
4600                     nla_put_u32(msg, NL80211_BSS_STATUS,
4601                                 NL80211_BSS_STATUS_IBSS_JOINED))
4602                         goto nla_put_failure;
4603                 break;
4604         default:
4605                 break;
4606         }
4607
4608         nla_nest_end(msg, bss);
4609
4610         return genlmsg_end(msg, hdr);
4611
4612  nla_put_failure:
4613         genlmsg_cancel(msg, hdr);
4614         return -EMSGSIZE;
4615 }
4616
4617 static int nl80211_dump_scan(struct sk_buff *skb,
4618                              struct netlink_callback *cb)
4619 {
4620         struct cfg80211_registered_device *rdev;
4621         struct net_device *dev;
4622         struct cfg80211_internal_bss *scan;
4623         struct wireless_dev *wdev;
4624         int start = cb->args[1], idx = 0;
4625         int err;
4626
4627         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4628         if (err)
4629                 return err;
4630
4631         wdev = dev->ieee80211_ptr;
4632
4633         wdev_lock(wdev);
4634         spin_lock_bh(&rdev->bss_lock);
4635         cfg80211_bss_expire(rdev);
4636
4637         cb->seq = rdev->bss_generation;
4638
4639         list_for_each_entry(scan, &rdev->bss_list, list) {
4640                 if (++idx <= start)
4641                         continue;
4642                 if (nl80211_send_bss(skb, cb,
4643                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4644                                 rdev, wdev, scan) < 0) {
4645                         idx--;
4646                         break;
4647                 }
4648         }
4649
4650         spin_unlock_bh(&rdev->bss_lock);
4651         wdev_unlock(wdev);
4652
4653         cb->args[1] = idx;
4654         nl80211_finish_netdev_dump(rdev);
4655
4656         return skb->len;
4657 }
4658
4659 static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
4660                                 int flags, struct net_device *dev,
4661                                 struct survey_info *survey)
4662 {
4663         void *hdr;
4664         struct nlattr *infoattr;
4665
4666         hdr = nl80211hdr_put(msg, pid, seq, flags,
4667                              NL80211_CMD_NEW_SURVEY_RESULTS);
4668         if (!hdr)
4669                 return -ENOMEM;
4670
4671         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4672                 goto nla_put_failure;
4673
4674         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4675         if (!infoattr)
4676                 goto nla_put_failure;
4677
4678         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4679                         survey->channel->center_freq))
4680                 goto nla_put_failure;
4681
4682         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4683             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4684                 goto nla_put_failure;
4685         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4686             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4687                 goto nla_put_failure;
4688         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4689             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4690                         survey->channel_time))
4691                 goto nla_put_failure;
4692         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4693             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4694                         survey->channel_time_busy))
4695                 goto nla_put_failure;
4696         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4697             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
4698                         survey->channel_time_ext_busy))
4699                 goto nla_put_failure;
4700         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
4701             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
4702                         survey->channel_time_rx))
4703                 goto nla_put_failure;
4704         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
4705             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
4706                         survey->channel_time_tx))
4707                 goto nla_put_failure;
4708
4709         nla_nest_end(msg, infoattr);
4710
4711         return genlmsg_end(msg, hdr);
4712
4713  nla_put_failure:
4714         genlmsg_cancel(msg, hdr);
4715         return -EMSGSIZE;
4716 }
4717
4718 static int nl80211_dump_survey(struct sk_buff *skb,
4719                         struct netlink_callback *cb)
4720 {
4721         struct survey_info survey;
4722         struct cfg80211_registered_device *dev;
4723         struct net_device *netdev;
4724         int survey_idx = cb->args[1];
4725         int res;
4726
4727         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
4728         if (res)
4729                 return res;
4730
4731         if (!dev->ops->dump_survey) {
4732                 res = -EOPNOTSUPP;
4733                 goto out_err;
4734         }
4735
4736         while (1) {
4737                 struct ieee80211_channel *chan;
4738
4739                 res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
4740                                             &survey);
4741                 if (res == -ENOENT)
4742                         break;
4743                 if (res)
4744                         goto out_err;
4745
4746                 /* Survey without a channel doesn't make sense */
4747                 if (!survey.channel) {
4748                         res = -EINVAL;
4749                         goto out;
4750                 }
4751
4752                 chan = ieee80211_get_channel(&dev->wiphy,
4753                                              survey.channel->center_freq);
4754                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
4755                         survey_idx++;
4756                         continue;
4757                 }
4758
4759                 if (nl80211_send_survey(skb,
4760                                 NETLINK_CB(cb->skb).pid,
4761                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4762                                 netdev,
4763                                 &survey) < 0)
4764                         goto out;
4765                 survey_idx++;
4766         }
4767
4768  out:
4769         cb->args[1] = survey_idx;
4770         res = skb->len;
4771  out_err:
4772         nl80211_finish_netdev_dump(dev);
4773         return res;
4774 }
4775
4776 static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
4777 {
4778         return auth_type <= NL80211_AUTHTYPE_MAX;
4779 }
4780
4781 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
4782 {
4783         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
4784                                   NL80211_WPA_VERSION_2));
4785 }
4786
4787 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
4788 {
4789         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4790         struct net_device *dev = info->user_ptr[1];
4791         struct ieee80211_channel *chan;
4792         const u8 *bssid, *ssid, *ie = NULL;
4793         int err, ssid_len, ie_len = 0;
4794         enum nl80211_auth_type auth_type;
4795         struct key_parse key;
4796         bool local_state_change;
4797
4798         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4799                 return -EINVAL;
4800
4801         if (!info->attrs[NL80211_ATTR_MAC])
4802                 return -EINVAL;
4803
4804         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
4805                 return -EINVAL;
4806
4807         if (!info->attrs[NL80211_ATTR_SSID])
4808                 return -EINVAL;
4809
4810         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
4811                 return -EINVAL;
4812
4813         err = nl80211_parse_key(info, &key);
4814         if (err)
4815                 return err;
4816
4817         if (key.idx >= 0) {
4818                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
4819                         return -EINVAL;
4820                 if (!key.p.key || !key.p.key_len)
4821                         return -EINVAL;
4822                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
4823                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
4824                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
4825                      key.p.key_len != WLAN_KEY_LEN_WEP104))
4826                         return -EINVAL;
4827                 if (key.idx > 4)
4828                         return -EINVAL;
4829         } else {
4830                 key.p.key_len = 0;
4831                 key.p.key = NULL;
4832         }
4833
4834         if (key.idx >= 0) {
4835                 int i;
4836                 bool ok = false;
4837                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
4838                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
4839                                 ok = true;
4840                                 break;
4841                         }
4842                 }
4843                 if (!ok)
4844                         return -EINVAL;
4845         }
4846
4847         if (!rdev->ops->auth)
4848                 return -EOPNOTSUPP;
4849
4850         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4851             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4852                 return -EOPNOTSUPP;
4853
4854         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4855         chan = ieee80211_get_channel(&rdev->wiphy,
4856                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4857         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4858                 return -EINVAL;
4859
4860         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
4861         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
4862
4863         if (info->attrs[NL80211_ATTR_IE]) {
4864                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
4865                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4866         }
4867
4868         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
4869         if (!nl80211_valid_auth_type(auth_type))
4870                 return -EINVAL;
4871
4872         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
4873
4874         /*
4875          * Since we no longer track auth state, ignore
4876          * requests to only change local state.
4877          */
4878         if (local_state_change)
4879                 return 0;
4880
4881         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
4882                                   ssid, ssid_len, ie, ie_len,
4883                                   key.p.key, key.p.key_len, key.idx);
4884 }
4885
4886 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
4887                                    struct genl_info *info,
4888                                    struct cfg80211_crypto_settings *settings,
4889                                    int cipher_limit)
4890 {
4891         memset(settings, 0, sizeof(*settings));
4892
4893         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
4894
4895         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
4896                 u16 proto;
4897                 proto = nla_get_u16(
4898                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
4899                 settings->control_port_ethertype = cpu_to_be16(proto);
4900                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
4901                     proto != ETH_P_PAE)
4902                         return -EINVAL;
4903                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
4904                         settings->control_port_no_encrypt = true;
4905         } else
4906                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
4907
4908         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
4909                 void *data;
4910                 int len, i;
4911
4912                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4913                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
4914                 settings->n_ciphers_pairwise = len / sizeof(u32);
4915
4916                 if (len % sizeof(u32))
4917                         return -EINVAL;
4918
4919                 if (settings->n_ciphers_pairwise > cipher_limit)
4920                         return -EINVAL;
4921
4922                 memcpy(settings->ciphers_pairwise, data, len);
4923
4924                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
4925                         if (!cfg80211_supported_cipher_suite(
4926                                         &rdev->wiphy,
4927                                         settings->ciphers_pairwise[i]))
4928                                 return -EINVAL;
4929         }
4930
4931         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
4932                 settings->cipher_group =
4933                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
4934                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
4935                                                      settings->cipher_group))
4936                         return -EINVAL;
4937         }
4938
4939         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
4940                 settings->wpa_versions =
4941                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
4942                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
4943                         return -EINVAL;
4944         }
4945
4946         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
4947                 void *data;
4948                 int len;
4949
4950                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
4951                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
4952                 settings->n_akm_suites = len / sizeof(u32);
4953
4954                 if (len % sizeof(u32))
4955                         return -EINVAL;
4956
4957                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
4958                         return -EINVAL;
4959
4960                 memcpy(settings->akm_suites, data, len);
4961         }
4962
4963         return 0;
4964 }
4965
4966 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
4967 {
4968         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4969         struct net_device *dev = info->user_ptr[1];
4970         struct cfg80211_crypto_settings crypto;
4971         struct ieee80211_channel *chan;
4972         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
4973         int err, ssid_len, ie_len = 0;
4974         bool use_mfp = false;
4975         u32 flags = 0;
4976         struct ieee80211_ht_cap *ht_capa = NULL;
4977         struct ieee80211_ht_cap *ht_capa_mask = NULL;
4978
4979         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4980                 return -EINVAL;
4981
4982         if (!info->attrs[NL80211_ATTR_MAC] ||
4983             !info->attrs[NL80211_ATTR_SSID] ||
4984             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
4985                 return -EINVAL;
4986
4987         if (!rdev->ops->assoc)
4988                 return -EOPNOTSUPP;
4989
4990         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
4991             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
4992                 return -EOPNOTSUPP;
4993
4994         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
4995
4996         chan = ieee80211_get_channel(&rdev->wiphy,
4997                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
4998         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
4999                 return -EINVAL;
5000
5001         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5002         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5003
5004         if (info->attrs[NL80211_ATTR_IE]) {
5005                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5006                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5007         }
5008
5009         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5010                 enum nl80211_mfp mfp =
5011                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5012                 if (mfp == NL80211_MFP_REQUIRED)
5013                         use_mfp = true;
5014                 else if (mfp != NL80211_MFP_NO)
5015                         return -EINVAL;
5016         }
5017
5018         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5019                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5020
5021         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5022                 flags |= ASSOC_REQ_DISABLE_HT;
5023
5024         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5025                 ht_capa_mask =
5026                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5027
5028         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5029                 if (!ht_capa_mask)
5030                         return -EINVAL;
5031                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5032         }
5033
5034         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5035         if (!err)
5036                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5037                                           ssid, ssid_len, ie, ie_len, use_mfp,
5038                                           &crypto, flags, ht_capa,
5039                                           ht_capa_mask);
5040
5041         return err;
5042 }
5043
5044 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5045 {
5046         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5047         struct net_device *dev = info->user_ptr[1];
5048         const u8 *ie = NULL, *bssid;
5049         int ie_len = 0;
5050         u16 reason_code;
5051         bool local_state_change;
5052
5053         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5054                 return -EINVAL;
5055
5056         if (!info->attrs[NL80211_ATTR_MAC])
5057                 return -EINVAL;
5058
5059         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5060                 return -EINVAL;
5061
5062         if (!rdev->ops->deauth)
5063                 return -EOPNOTSUPP;
5064
5065         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5066             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5067                 return -EOPNOTSUPP;
5068
5069         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5070
5071         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5072         if (reason_code == 0) {
5073                 /* Reason Code 0 is reserved */
5074                 return -EINVAL;
5075         }
5076
5077         if (info->attrs[NL80211_ATTR_IE]) {
5078                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5079                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5080         }
5081
5082         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5083
5084         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5085                                     local_state_change);
5086 }
5087
5088 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5089 {
5090         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5091         struct net_device *dev = info->user_ptr[1];
5092         const u8 *ie = NULL, *bssid;
5093         int ie_len = 0;
5094         u16 reason_code;
5095         bool local_state_change;
5096
5097         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5098                 return -EINVAL;
5099
5100         if (!info->attrs[NL80211_ATTR_MAC])
5101                 return -EINVAL;
5102
5103         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5104                 return -EINVAL;
5105
5106         if (!rdev->ops->disassoc)
5107                 return -EOPNOTSUPP;
5108
5109         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5110             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5111                 return -EOPNOTSUPP;
5112
5113         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5114
5115         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5116         if (reason_code == 0) {
5117                 /* Reason Code 0 is reserved */
5118                 return -EINVAL;
5119         }
5120
5121         if (info->attrs[NL80211_ATTR_IE]) {
5122                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5123                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5124         }
5125
5126         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5127
5128         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5129                                       local_state_change);
5130 }
5131
5132 static bool
5133 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5134                          int mcast_rate[IEEE80211_NUM_BANDS],
5135                          int rateval)
5136 {
5137         struct wiphy *wiphy = &rdev->wiphy;
5138         bool found = false;
5139         int band, i;
5140
5141         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5142                 struct ieee80211_supported_band *sband;
5143
5144                 sband = wiphy->bands[band];
5145                 if (!sband)
5146                         continue;
5147
5148                 for (i = 0; i < sband->n_bitrates; i++) {
5149                         if (sband->bitrates[i].bitrate == rateval) {
5150                                 mcast_rate[band] = i + 1;
5151                                 found = true;
5152                                 break;
5153                         }
5154                 }
5155         }
5156
5157         return found;
5158 }
5159
5160 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5161 {
5162         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5163         struct net_device *dev = info->user_ptr[1];
5164         struct cfg80211_ibss_params ibss;
5165         struct wiphy *wiphy;
5166         struct cfg80211_cached_keys *connkeys = NULL;
5167         int err;
5168
5169         memset(&ibss, 0, sizeof(ibss));
5170
5171         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5172                 return -EINVAL;
5173
5174         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5175             !info->attrs[NL80211_ATTR_SSID] ||
5176             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5177                 return -EINVAL;
5178
5179         ibss.beacon_interval = 100;
5180
5181         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5182                 ibss.beacon_interval =
5183                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5184                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5185                         return -EINVAL;
5186         }
5187
5188         if (!rdev->ops->join_ibss)
5189                 return -EOPNOTSUPP;
5190
5191         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5192                 return -EOPNOTSUPP;
5193
5194         wiphy = &rdev->wiphy;
5195
5196         if (info->attrs[NL80211_ATTR_MAC]) {
5197                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5198
5199                 if (!is_valid_ether_addr(ibss.bssid))
5200                         return -EINVAL;
5201         }
5202         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5203         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5204
5205         if (info->attrs[NL80211_ATTR_IE]) {
5206                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5207                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5208         }
5209
5210         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
5211                 enum nl80211_channel_type channel_type;
5212
5213                 if (!nl80211_valid_channel_type(info, &channel_type))
5214                         return -EINVAL;
5215
5216                 if (channel_type != NL80211_CHAN_NO_HT &&
5217                     !(wiphy->features & NL80211_FEATURE_HT_IBSS))
5218                         return -EINVAL;
5219
5220                 ibss.channel_type = channel_type;
5221         } else {
5222                 ibss.channel_type = NL80211_CHAN_NO_HT;
5223         }
5224
5225         ibss.channel = rdev_freq_to_chan(rdev,
5226                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
5227                 ibss.channel_type);
5228         if (!ibss.channel ||
5229             ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
5230             ibss.channel->flags & IEEE80211_CHAN_DISABLED)
5231                 return -EINVAL;
5232
5233         /* Both channels should be able to initiate communication */
5234         if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
5235              ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
5236             !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
5237                                           ibss.channel_type))
5238                 return -EINVAL;
5239
5240         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5241         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5242
5243         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5244                 u8 *rates =
5245                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5246                 int n_rates =
5247                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5248                 struct ieee80211_supported_band *sband =
5249                         wiphy->bands[ibss.channel->band];
5250
5251                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5252                                              &ibss.basic_rates);
5253                 if (err)
5254                         return err;
5255         }
5256
5257         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5258             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5259                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5260                 return -EINVAL;
5261
5262         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5263                 connkeys = nl80211_parse_connkeys(rdev,
5264                                         info->attrs[NL80211_ATTR_KEYS]);
5265                 if (IS_ERR(connkeys))
5266                         return PTR_ERR(connkeys);
5267         }
5268
5269         ibss.control_port =
5270                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5271
5272         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5273         if (err)
5274                 kfree(connkeys);
5275         return err;
5276 }
5277
5278 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5279 {
5280         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5281         struct net_device *dev = info->user_ptr[1];
5282
5283         if (!rdev->ops->leave_ibss)
5284                 return -EOPNOTSUPP;
5285
5286         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5287                 return -EOPNOTSUPP;
5288
5289         return cfg80211_leave_ibss(rdev, dev, false);
5290 }
5291
5292 #ifdef CONFIG_NL80211_TESTMODE
5293 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5294         .name = "testmode",
5295 };
5296
5297 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5298 {
5299         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5300         int err;
5301
5302         if (!info->attrs[NL80211_ATTR_TESTDATA])
5303                 return -EINVAL;
5304
5305         err = -EOPNOTSUPP;
5306         if (rdev->ops->testmode_cmd) {
5307                 rdev->testmode_info = info;
5308                 err = rdev->ops->testmode_cmd(&rdev->wiphy,
5309                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5310                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5311                 rdev->testmode_info = NULL;
5312         }
5313
5314         return err;
5315 }
5316
5317 static int nl80211_testmode_dump(struct sk_buff *skb,
5318                                  struct netlink_callback *cb)
5319 {
5320         struct cfg80211_registered_device *rdev;
5321         int err;
5322         long phy_idx;
5323         void *data = NULL;
5324         int data_len = 0;
5325
5326         if (cb->args[0]) {
5327                 /*
5328                  * 0 is a valid index, but not valid for args[0],
5329                  * so we need to offset by 1.
5330                  */
5331                 phy_idx = cb->args[0] - 1;
5332         } else {
5333                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5334                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5335                                   nl80211_policy);
5336                 if (err)
5337                         return err;
5338
5339                 mutex_lock(&cfg80211_mutex);
5340                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5341                                                   nl80211_fam.attrbuf);
5342                 if (IS_ERR(rdev)) {
5343                         mutex_unlock(&cfg80211_mutex);
5344                         return PTR_ERR(rdev);
5345                 }
5346                 phy_idx = rdev->wiphy_idx;
5347                 rdev = NULL;
5348                 mutex_unlock(&cfg80211_mutex);
5349
5350                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5351                         cb->args[1] =
5352                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5353         }
5354
5355         if (cb->args[1]) {
5356                 data = nla_data((void *)cb->args[1]);
5357                 data_len = nla_len((void *)cb->args[1]);
5358         }
5359
5360         mutex_lock(&cfg80211_mutex);
5361         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5362         if (!rdev) {
5363                 mutex_unlock(&cfg80211_mutex);
5364                 return -ENOENT;
5365         }
5366         cfg80211_lock_rdev(rdev);
5367         mutex_unlock(&cfg80211_mutex);
5368
5369         if (!rdev->ops->testmode_dump) {
5370                 err = -EOPNOTSUPP;
5371                 goto out_err;
5372         }
5373
5374         while (1) {
5375                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
5376                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5377                                            NL80211_CMD_TESTMODE);
5378                 struct nlattr *tmdata;
5379
5380                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5381                         genlmsg_cancel(skb, hdr);
5382                         break;
5383                 }
5384
5385                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5386                 if (!tmdata) {
5387                         genlmsg_cancel(skb, hdr);
5388                         break;
5389                 }
5390                 err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
5391                                                data, data_len);
5392                 nla_nest_end(skb, tmdata);
5393
5394                 if (err == -ENOBUFS || err == -ENOENT) {
5395                         genlmsg_cancel(skb, hdr);
5396                         break;
5397                 } else if (err) {
5398                         genlmsg_cancel(skb, hdr);
5399                         goto out_err;
5400                 }
5401
5402                 genlmsg_end(skb, hdr);
5403         }
5404
5405         err = skb->len;
5406         /* see above */
5407         cb->args[0] = phy_idx + 1;
5408  out_err:
5409         cfg80211_unlock_rdev(rdev);
5410         return err;
5411 }
5412
5413 static struct sk_buff *
5414 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5415                               int approxlen, u32 pid, u32 seq, gfp_t gfp)
5416 {
5417         struct sk_buff *skb;
5418         void *hdr;
5419         struct nlattr *data;
5420
5421         skb = nlmsg_new(approxlen + 100, gfp);
5422         if (!skb)
5423                 return NULL;
5424
5425         hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
5426         if (!hdr) {
5427                 kfree_skb(skb);
5428                 return NULL;
5429         }
5430
5431         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5432                 goto nla_put_failure;
5433         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5434
5435         ((void **)skb->cb)[0] = rdev;
5436         ((void **)skb->cb)[1] = hdr;
5437         ((void **)skb->cb)[2] = data;
5438
5439         return skb;
5440
5441  nla_put_failure:
5442         kfree_skb(skb);
5443         return NULL;
5444 }
5445
5446 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5447                                                   int approxlen)
5448 {
5449         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5450
5451         if (WARN_ON(!rdev->testmode_info))
5452                 return NULL;
5453
5454         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5455                                 rdev->testmode_info->snd_pid,
5456                                 rdev->testmode_info->snd_seq,
5457                                 GFP_KERNEL);
5458 }
5459 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5460
5461 int cfg80211_testmode_reply(struct sk_buff *skb)
5462 {
5463         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5464         void *hdr = ((void **)skb->cb)[1];
5465         struct nlattr *data = ((void **)skb->cb)[2];
5466
5467         if (WARN_ON(!rdev->testmode_info)) {
5468                 kfree_skb(skb);
5469                 return -EINVAL;
5470         }
5471
5472         nla_nest_end(skb, data);
5473         genlmsg_end(skb, hdr);
5474         return genlmsg_reply(skb, rdev->testmode_info);
5475 }
5476 EXPORT_SYMBOL(cfg80211_testmode_reply);
5477
5478 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5479                                                   int approxlen, gfp_t gfp)
5480 {
5481         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5482
5483         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5484 }
5485 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5486
5487 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5488 {
5489         void *hdr = ((void **)skb->cb)[1];
5490         struct nlattr *data = ((void **)skb->cb)[2];
5491
5492         nla_nest_end(skb, data);
5493         genlmsg_end(skb, hdr);
5494         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5495 }
5496 EXPORT_SYMBOL(cfg80211_testmode_event);
5497 #endif
5498
5499 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5500 {
5501         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5502         struct net_device *dev = info->user_ptr[1];
5503         struct cfg80211_connect_params connect;
5504         struct wiphy *wiphy;
5505         struct cfg80211_cached_keys *connkeys = NULL;
5506         int err;
5507
5508         memset(&connect, 0, sizeof(connect));
5509
5510         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5511                 return -EINVAL;
5512
5513         if (!info->attrs[NL80211_ATTR_SSID] ||
5514             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5515                 return -EINVAL;
5516
5517         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5518                 connect.auth_type =
5519                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5520                 if (!nl80211_valid_auth_type(connect.auth_type))
5521                         return -EINVAL;
5522         } else
5523                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5524
5525         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5526
5527         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5528                                       NL80211_MAX_NR_CIPHER_SUITES);
5529         if (err)
5530                 return err;
5531
5532         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5533             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5534                 return -EOPNOTSUPP;
5535
5536         wiphy = &rdev->wiphy;
5537
5538         connect.bg_scan_period = -1;
5539         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5540                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5541                 connect.bg_scan_period =
5542                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5543         }
5544
5545         if (info->attrs[NL80211_ATTR_MAC])
5546                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5547         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5548         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5549
5550         if (info->attrs[NL80211_ATTR_IE]) {
5551                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5552                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5553         }
5554
5555         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5556                 connect.channel =
5557                         ieee80211_get_channel(wiphy,
5558                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5559                 if (!connect.channel ||
5560                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5561                         return -EINVAL;
5562         }
5563
5564         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5565                 connkeys = nl80211_parse_connkeys(rdev,
5566                                         info->attrs[NL80211_ATTR_KEYS]);
5567                 if (IS_ERR(connkeys))
5568                         return PTR_ERR(connkeys);
5569         }
5570
5571         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5572                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5573
5574         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5575                 memcpy(&connect.ht_capa_mask,
5576                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5577                        sizeof(connect.ht_capa_mask));
5578
5579         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5580                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5581                         return -EINVAL;
5582                 memcpy(&connect.ht_capa,
5583                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5584                        sizeof(connect.ht_capa));
5585         }
5586
5587         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5588         if (err)
5589                 kfree(connkeys);
5590         return err;
5591 }
5592
5593 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5594 {
5595         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5596         struct net_device *dev = info->user_ptr[1];
5597         u16 reason;
5598
5599         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5600                 reason = WLAN_REASON_DEAUTH_LEAVING;
5601         else
5602                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5603
5604         if (reason == 0)
5605                 return -EINVAL;
5606
5607         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5608             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5609                 return -EOPNOTSUPP;
5610
5611         return cfg80211_disconnect(rdev, dev, reason, true);
5612 }
5613
5614 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5615 {
5616         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5617         struct net *net;
5618         int err;
5619         u32 pid;
5620
5621         if (!info->attrs[NL80211_ATTR_PID])
5622                 return -EINVAL;
5623
5624         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5625
5626         net = get_net_ns_by_pid(pid);
5627         if (IS_ERR(net))
5628                 return PTR_ERR(net);
5629
5630         err = 0;
5631
5632         /* check if anything to do */
5633         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5634                 err = cfg80211_switch_netns(rdev, net);
5635
5636         put_net(net);
5637         return err;
5638 }
5639
5640 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5641 {
5642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5643         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5644                         struct cfg80211_pmksa *pmksa) = NULL;
5645         struct net_device *dev = info->user_ptr[1];
5646         struct cfg80211_pmksa pmksa;
5647
5648         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5649
5650         if (!info->attrs[NL80211_ATTR_MAC])
5651                 return -EINVAL;
5652
5653         if (!info->attrs[NL80211_ATTR_PMKID])
5654                 return -EINVAL;
5655
5656         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5657         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5658
5659         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5660             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5661                 return -EOPNOTSUPP;
5662
5663         switch (info->genlhdr->cmd) {
5664         case NL80211_CMD_SET_PMKSA:
5665                 rdev_ops = rdev->ops->set_pmksa;
5666                 break;
5667         case NL80211_CMD_DEL_PMKSA:
5668                 rdev_ops = rdev->ops->del_pmksa;
5669                 break;
5670         default:
5671                 WARN_ON(1);
5672                 break;
5673         }
5674
5675         if (!rdev_ops)
5676                 return -EOPNOTSUPP;
5677
5678         return rdev_ops(&rdev->wiphy, dev, &pmksa);
5679 }
5680
5681 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
5682 {
5683         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5684         struct net_device *dev = info->user_ptr[1];
5685
5686         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5687             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5688                 return -EOPNOTSUPP;
5689
5690         if (!rdev->ops->flush_pmksa)
5691                 return -EOPNOTSUPP;
5692
5693         return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
5694 }
5695
5696 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
5697 {
5698         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5699         struct net_device *dev = info->user_ptr[1];
5700         u8 action_code, dialog_token;
5701         u16 status_code;
5702         u8 *peer;
5703
5704         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5705             !rdev->ops->tdls_mgmt)
5706                 return -EOPNOTSUPP;
5707
5708         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
5709             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
5710             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
5711             !info->attrs[NL80211_ATTR_IE] ||
5712             !info->attrs[NL80211_ATTR_MAC])
5713                 return -EINVAL;
5714
5715         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5716         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
5717         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
5718         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
5719
5720         return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
5721                                     dialog_token, status_code,
5722                                     nla_data(info->attrs[NL80211_ATTR_IE]),
5723                                     nla_len(info->attrs[NL80211_ATTR_IE]));
5724 }
5725
5726 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
5727 {
5728         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5729         struct net_device *dev = info->user_ptr[1];
5730         enum nl80211_tdls_operation operation;
5731         u8 *peer;
5732
5733         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
5734             !rdev->ops->tdls_oper)
5735                 return -EOPNOTSUPP;
5736
5737         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
5738             !info->attrs[NL80211_ATTR_MAC])
5739                 return -EINVAL;
5740
5741         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
5742         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
5743
5744         return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
5745 }
5746
5747 static int nl80211_remain_on_channel(struct sk_buff *skb,
5748                                      struct genl_info *info)
5749 {
5750         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5751         struct net_device *dev = info->user_ptr[1];
5752         struct ieee80211_channel *chan;
5753         struct sk_buff *msg;
5754         void *hdr;
5755         u64 cookie;
5756         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
5757         u32 freq, duration;
5758         int err;
5759
5760         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
5761             !info->attrs[NL80211_ATTR_DURATION])
5762                 return -EINVAL;
5763
5764         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
5765
5766         if (!rdev->ops->remain_on_channel ||
5767             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
5768                 return -EOPNOTSUPP;
5769
5770         /*
5771          * We should be on that channel for at least a minimum amount of
5772          * time (10ms) but no longer than the driver supports.
5773          */
5774         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
5775             duration > rdev->wiphy.max_remain_on_channel_duration)
5776                 return -EINVAL;
5777
5778         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
5779             !nl80211_valid_channel_type(info, &channel_type))
5780                 return -EINVAL;
5781
5782         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
5783         chan = rdev_freq_to_chan(rdev, freq, channel_type);
5784         if (chan == NULL)
5785                 return -EINVAL;
5786
5787         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
5788         if (!msg)
5789                 return -ENOMEM;
5790
5791         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
5792                              NL80211_CMD_REMAIN_ON_CHANNEL);
5793
5794         if (IS_ERR(hdr)) {
5795                 err = PTR_ERR(hdr);
5796                 goto free_msg;
5797         }
5798
5799         err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
5800                                            channel_type, duration, &cookie);
5801
5802         if (err)
5803                 goto free_msg;
5804
5805         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
5806                 goto nla_put_failure;
5807
5808         genlmsg_end(msg, hdr);
5809
5810         return genlmsg_reply(msg, info);
5811
5812  nla_put_failure:
5813         err = -ENOBUFS;
5814  free_msg:
5815         nlmsg_free(msg);
5816         return err;
5817 }
5818
5819 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
5820                                             struct genl_info *info)
5821 {
5822         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5823         struct net_device *dev = info->user_ptr[1];
5824         u64 cookie;
5825
5826         if (!info->attrs[NL80211_ATTR_COOKIE])
5827                 return -EINVAL;
5828
5829         if (!rdev->ops->cancel_remain_on_channel)
5830                 return -EOPNOTSUPP;
5831
5832         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
5833
5834         return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
5835 }
5836
5837 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
5838                            u8 *rates, u8 rates_len)
5839 {
5840         u8 i;
5841         u32 mask = 0;
5842
5843         for (i = 0; i < rates_len; i++) {
5844                 int rate = (rates[i] & 0x7f) * 5;
5845                 int ridx;
5846                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
5847                         struct ieee80211_rate *srate =
5848                                 &sband->bitrates[ridx];
5849                         if (rate == srate->bitrate) {
5850                                 mask |= 1 << ridx;
5851                                 break;
5852                         }
5853                 }
5854                 if (ridx == sband->n_bitrates)
5855                         return 0; /* rate not found */
5856         }
5857
5858         return mask;
5859 }
5860
5861 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
5862                                u8 *rates, u8 rates_len,
5863                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
5864 {
5865         u8 i;
5866
5867         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
5868
5869         for (i = 0; i < rates_len; i++) {
5870                 int ridx, rbit;
5871
5872                 ridx = rates[i] / 8;
5873                 rbit = BIT(rates[i] % 8);
5874
5875                 /* check validity */
5876                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
5877                         return false;
5878
5879                 /* check availability */
5880                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
5881                         mcs[ridx] |= rbit;
5882                 else
5883                         return false;
5884         }
5885
5886         return true;
5887 }
5888
5889 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
5890         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
5891                                     .len = NL80211_MAX_SUPP_RATES },
5892         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
5893                                  .len = NL80211_MAX_SUPP_HT_RATES },
5894 };
5895
5896 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
5897                                        struct genl_info *info)
5898 {
5899         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
5900         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5901         struct cfg80211_bitrate_mask mask;
5902         int rem, i;
5903         struct net_device *dev = info->user_ptr[1];
5904         struct nlattr *tx_rates;
5905         struct ieee80211_supported_band *sband;
5906
5907         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
5908                 return -EINVAL;
5909
5910         if (!rdev->ops->set_bitrate_mask)
5911                 return -EOPNOTSUPP;
5912
5913         memset(&mask, 0, sizeof(mask));
5914         /* Default to all rates enabled */
5915         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
5916                 sband = rdev->wiphy.bands[i];
5917                 mask.control[i].legacy =
5918                         sband ? (1 << sband->n_bitrates) - 1 : 0;
5919                 if (sband)
5920                         memcpy(mask.control[i].mcs,
5921                                sband->ht_cap.mcs.rx_mask,
5922                                sizeof(mask.control[i].mcs));
5923                 else
5924                         memset(mask.control[i].mcs, 0,
5925                                sizeof(mask.control[i].mcs));
5926         }
5927
5928         /*
5929          * The nested attribute uses enum nl80211_band as the index. This maps
5930          * directly to the enum ieee80211_band values used in cfg80211.
5931          */
5932         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
5933         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
5934         {
5935                 enum ieee80211_band band = nla_type(tx_rates);
5936                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
5937                         return -EINVAL;
5938                 sband = rdev->wiphy.bands[band];
5939                 if (sband == NULL)
5940                         return -EINVAL;
5941                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
5942                           nla_len(tx_rates), nl80211_txattr_policy);
5943                 if (tb[NL80211_TXRATE_LEGACY]) {
5944                         mask.control[band].legacy = rateset_to_mask(
5945                                 sband,
5946                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
5947                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
5948                         if ((mask.control[band].legacy == 0) &&
5949                             nla_len(tb[NL80211_TXRATE_LEGACY]))
5950                                 return -EINVAL;
5951                 }
5952                 if (tb[NL80211_TXRATE_MCS]) {
5953                         if (!ht_rateset_to_mask(
5954                                         sband,
5955                                         nla_data(tb[NL80211_TXRATE_MCS]),
5956                                         nla_len(tb[NL80211_TXRATE_MCS]),
5957                                         mask.control[band].mcs))
5958                                 return -EINVAL;
5959                 }
5960
5961                 if (mask.control[band].legacy == 0) {
5962                         /* don't allow empty legacy rates if HT
5963                          * is not even supported. */
5964                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
5965                                 return -EINVAL;
5966
5967                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
5968                                 if (mask.control[band].mcs[i])
5969                                         break;
5970
5971                         /* legacy and mcs rates may not be both empty */
5972                         if (i == IEEE80211_HT_MCS_MASK_LEN)
5973                                 return -EINVAL;
5974                 }
5975         }
5976
5977         return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
5978 }
5979
5980 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
5981 {
5982         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5983         struct net_device *dev = info->user_ptr[1];
5984         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
5985
5986         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
5987                 return -EINVAL;
5988
5989         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
5990                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
5991
5992         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5993             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5994             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
5995             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
5996             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
5997             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
5998             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
5999                 return -EOPNOTSUPP;
6000
6001         /* not much point in registering if we can't reply */
6002         if (!rdev->ops->mgmt_tx)
6003                 return -EOPNOTSUPP;
6004
6005         return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
6006                         frame_type,
6007                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6008                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6009 }
6010
6011 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6012 {
6013         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6014         struct net_device *dev = info->user_ptr[1];
6015         struct ieee80211_channel *chan;
6016         enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6017         bool channel_type_valid = false;
6018         u32 freq;
6019         int err;
6020         void *hdr = NULL;
6021         u64 cookie;
6022         struct sk_buff *msg = NULL;
6023         unsigned int wait = 0;
6024         bool offchan, no_cck, dont_wait_for_ack;
6025
6026         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6027
6028         if (!info->attrs[NL80211_ATTR_FRAME] ||
6029             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
6030                 return -EINVAL;
6031
6032         if (!rdev->ops->mgmt_tx)
6033                 return -EOPNOTSUPP;
6034
6035         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6036             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6037             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6038             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6039             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6040             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
6041             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6042                 return -EOPNOTSUPP;
6043
6044         if (info->attrs[NL80211_ATTR_DURATION]) {
6045                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6046                         return -EINVAL;
6047                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6048
6049                 /*
6050                  * We should wait on the channel for at least a minimum amount
6051                  * of time (10ms) but no longer than the driver supports.
6052                  */
6053                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6054                     wait > rdev->wiphy.max_remain_on_channel_duration)
6055                         return -EINVAL;
6056
6057         }
6058
6059         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
6060                 if (!nl80211_valid_channel_type(info, &channel_type))
6061                         return -EINVAL;
6062                 channel_type_valid = true;
6063         }
6064
6065         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6066
6067         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6068                 return -EINVAL;
6069
6070         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6071
6072         freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
6073         chan = rdev_freq_to_chan(rdev, freq, channel_type);
6074         if (chan == NULL)
6075                 return -EINVAL;
6076
6077         if (!dont_wait_for_ack) {
6078                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6079                 if (!msg)
6080                         return -ENOMEM;
6081
6082                 hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6083                                      NL80211_CMD_FRAME);
6084
6085                 if (IS_ERR(hdr)) {
6086                         err = PTR_ERR(hdr);
6087                         goto free_msg;
6088                 }
6089         }
6090
6091         err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
6092                                     channel_type_valid, wait,
6093                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6094                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6095                                     no_cck, dont_wait_for_ack, &cookie);
6096         if (err)
6097                 goto free_msg;
6098
6099         if (msg) {
6100                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6101                         goto nla_put_failure;
6102
6103                 genlmsg_end(msg, hdr);
6104                 return genlmsg_reply(msg, info);
6105         }
6106
6107         return 0;
6108
6109  nla_put_failure:
6110         err = -ENOBUFS;
6111  free_msg:
6112         nlmsg_free(msg);
6113         return err;
6114 }
6115
6116 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6117 {
6118         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6119         struct net_device *dev = info->user_ptr[1];
6120         u64 cookie;
6121
6122         if (!info->attrs[NL80211_ATTR_COOKIE])
6123                 return -EINVAL;
6124
6125         if (!rdev->ops->mgmt_tx_cancel_wait)
6126                 return -EOPNOTSUPP;
6127
6128         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6129             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
6130             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
6131             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
6132             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
6133             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
6134                 return -EOPNOTSUPP;
6135
6136         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6137
6138         return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
6139 }
6140
6141 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6142 {
6143         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6144         struct wireless_dev *wdev;
6145         struct net_device *dev = info->user_ptr[1];
6146         u8 ps_state;
6147         bool state;
6148         int err;
6149
6150         if (!info->attrs[NL80211_ATTR_PS_STATE])
6151                 return -EINVAL;
6152
6153         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6154
6155         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6156                 return -EINVAL;
6157
6158         wdev = dev->ieee80211_ptr;
6159
6160         if (!rdev->ops->set_power_mgmt)
6161                 return -EOPNOTSUPP;
6162
6163         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6164
6165         if (state == wdev->ps)
6166                 return 0;
6167
6168         err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
6169                                         wdev->ps_timeout);
6170         if (!err)
6171                 wdev->ps = state;
6172         return err;
6173 }
6174
6175 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6176 {
6177         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6178         enum nl80211_ps_state ps_state;
6179         struct wireless_dev *wdev;
6180         struct net_device *dev = info->user_ptr[1];
6181         struct sk_buff *msg;
6182         void *hdr;
6183         int err;
6184
6185         wdev = dev->ieee80211_ptr;
6186
6187         if (!rdev->ops->set_power_mgmt)
6188                 return -EOPNOTSUPP;
6189
6190         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6191         if (!msg)
6192                 return -ENOMEM;
6193
6194         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6195                              NL80211_CMD_GET_POWER_SAVE);
6196         if (!hdr) {
6197                 err = -ENOBUFS;
6198                 goto free_msg;
6199         }
6200
6201         if (wdev->ps)
6202                 ps_state = NL80211_PS_ENABLED;
6203         else
6204                 ps_state = NL80211_PS_DISABLED;
6205
6206         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6207                 goto nla_put_failure;
6208
6209         genlmsg_end(msg, hdr);
6210         return genlmsg_reply(msg, info);
6211
6212  nla_put_failure:
6213         err = -ENOBUFS;
6214  free_msg:
6215         nlmsg_free(msg);
6216         return err;
6217 }
6218
6219 static struct nla_policy
6220 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6221         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6222         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6223         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6224 };
6225
6226 static int nl80211_set_cqm_rssi(struct genl_info *info,
6227                                 s32 threshold, u32 hysteresis)
6228 {
6229         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6230         struct wireless_dev *wdev;
6231         struct net_device *dev = info->user_ptr[1];
6232
6233         if (threshold > 0)
6234                 return -EINVAL;
6235
6236         wdev = dev->ieee80211_ptr;
6237
6238         if (!rdev->ops->set_cqm_rssi_config)
6239                 return -EOPNOTSUPP;
6240
6241         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6242             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6243                 return -EOPNOTSUPP;
6244
6245         return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
6246                                               threshold, hysteresis);
6247 }
6248
6249 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6250 {
6251         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6252         struct nlattr *cqm;
6253         int err;
6254
6255         cqm = info->attrs[NL80211_ATTR_CQM];
6256         if (!cqm) {
6257                 err = -EINVAL;
6258                 goto out;
6259         }
6260
6261         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6262                                nl80211_attr_cqm_policy);
6263         if (err)
6264                 goto out;
6265
6266         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6267             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6268                 s32 threshold;
6269                 u32 hysteresis;
6270                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6271                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6272                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6273         } else
6274                 err = -EINVAL;
6275
6276 out:
6277         return err;
6278 }
6279
6280 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6281 {
6282         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6283         struct net_device *dev = info->user_ptr[1];
6284         struct mesh_config cfg;
6285         struct mesh_setup setup;
6286         int err;
6287
6288         /* start with default */
6289         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6290         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6291
6292         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6293                 /* and parse parameters if given */
6294                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6295                 if (err)
6296                         return err;
6297         }
6298
6299         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6300             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6301                 return -EINVAL;
6302
6303         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6304         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6305
6306         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6307             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6308                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6309                         return -EINVAL;
6310
6311         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6312                 /* parse additional setup parameters if given */
6313                 err = nl80211_parse_mesh_setup(info, &setup);
6314                 if (err)
6315                         return err;
6316         }
6317
6318         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6319                 enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
6320
6321                 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
6322                     !nl80211_valid_channel_type(info, &channel_type))
6323                         return -EINVAL;
6324
6325                 setup.channel = rdev_freq_to_chan(rdev,
6326                         nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
6327                         channel_type);
6328                 if (!setup.channel)
6329                         return -EINVAL;
6330                 setup.channel_type = channel_type;
6331         } else {
6332                 /* cfg80211_join_mesh() will sort it out */
6333                 setup.channel = NULL;
6334         }
6335
6336         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6337 }
6338
6339 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6340 {
6341         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6342         struct net_device *dev = info->user_ptr[1];
6343
6344         return cfg80211_leave_mesh(rdev, dev);
6345 }
6346
6347 #ifdef CONFIG_PM
6348 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6349 {
6350         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6351         struct sk_buff *msg;
6352         void *hdr;
6353
6354         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6355                 return -EOPNOTSUPP;
6356
6357         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6358         if (!msg)
6359                 return -ENOMEM;
6360
6361         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6362                              NL80211_CMD_GET_WOWLAN);
6363         if (!hdr)
6364                 goto nla_put_failure;
6365
6366         if (rdev->wowlan) {
6367                 struct nlattr *nl_wowlan;
6368
6369                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6370                 if (!nl_wowlan)
6371                         goto nla_put_failure;
6372
6373                 if ((rdev->wowlan->any &&
6374                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6375                     (rdev->wowlan->disconnect &&
6376                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6377                     (rdev->wowlan->magic_pkt &&
6378                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6379                     (rdev->wowlan->gtk_rekey_failure &&
6380                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6381                     (rdev->wowlan->eap_identity_req &&
6382                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6383                     (rdev->wowlan->four_way_handshake &&
6384                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6385                     (rdev->wowlan->rfkill_release &&
6386                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6387                         goto nla_put_failure;
6388                 if (rdev->wowlan->n_patterns) {
6389                         struct nlattr *nl_pats, *nl_pat;
6390                         int i, pat_len;
6391
6392                         nl_pats = nla_nest_start(msg,
6393                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6394                         if (!nl_pats)
6395                                 goto nla_put_failure;
6396
6397                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6398                                 nl_pat = nla_nest_start(msg, i + 1);
6399                                 if (!nl_pat)
6400                                         goto nla_put_failure;
6401                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6402                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6403                                             DIV_ROUND_UP(pat_len, 8),
6404                                             rdev->wowlan->patterns[i].mask) ||
6405                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6406                                             pat_len,
6407                                             rdev->wowlan->patterns[i].pattern))
6408                                         goto nla_put_failure;
6409                                 nla_nest_end(msg, nl_pat);
6410                         }
6411                         nla_nest_end(msg, nl_pats);
6412                 }
6413
6414                 nla_nest_end(msg, nl_wowlan);
6415         }
6416
6417         genlmsg_end(msg, hdr);
6418         return genlmsg_reply(msg, info);
6419
6420 nla_put_failure:
6421         nlmsg_free(msg);
6422         return -ENOBUFS;
6423 }
6424
6425 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6426 {
6427         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6428         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6429         struct cfg80211_wowlan no_triggers = {};
6430         struct cfg80211_wowlan new_triggers = {};
6431         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6432         int err, i;
6433         bool prev_enabled = rdev->wowlan;
6434
6435         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6436                 return -EOPNOTSUPP;
6437
6438         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
6439                 goto no_triggers;
6440
6441         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6442                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6443                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6444                         nl80211_wowlan_policy);
6445         if (err)
6446                 return err;
6447
6448         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6449                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6450                         return -EINVAL;
6451                 new_triggers.any = true;
6452         }
6453
6454         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6455                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6456                         return -EINVAL;
6457                 new_triggers.disconnect = true;
6458         }
6459
6460         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6461                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6462                         return -EINVAL;
6463                 new_triggers.magic_pkt = true;
6464         }
6465
6466         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6467                 return -EINVAL;
6468
6469         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6470                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6471                         return -EINVAL;
6472                 new_triggers.gtk_rekey_failure = true;
6473         }
6474
6475         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6476                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6477                         return -EINVAL;
6478                 new_triggers.eap_identity_req = true;
6479         }
6480
6481         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6482                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6483                         return -EINVAL;
6484                 new_triggers.four_way_handshake = true;
6485         }
6486
6487         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6488                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6489                         return -EINVAL;
6490                 new_triggers.rfkill_release = true;
6491         }
6492
6493         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6494                 struct nlattr *pat;
6495                 int n_patterns = 0;
6496                 int rem, pat_len, mask_len;
6497                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6498
6499                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6500                                     rem)
6501                         n_patterns++;
6502                 if (n_patterns > wowlan->n_patterns)
6503                         return -EINVAL;
6504
6505                 new_triggers.patterns = kcalloc(n_patterns,
6506                                                 sizeof(new_triggers.patterns[0]),
6507                                                 GFP_KERNEL);
6508                 if (!new_triggers.patterns)
6509                         return -ENOMEM;
6510
6511                 new_triggers.n_patterns = n_patterns;
6512                 i = 0;
6513
6514                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6515                                     rem) {
6516                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6517                                   nla_data(pat), nla_len(pat), NULL);
6518                         err = -EINVAL;
6519                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6520                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6521                                 goto error;
6522                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6523                         mask_len = DIV_ROUND_UP(pat_len, 8);
6524                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6525                             mask_len)
6526                                 goto error;
6527                         if (pat_len > wowlan->pattern_max_len ||
6528                             pat_len < wowlan->pattern_min_len)
6529                                 goto error;
6530
6531                         new_triggers.patterns[i].mask =
6532                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6533                         if (!new_triggers.patterns[i].mask) {
6534                                 err = -ENOMEM;
6535                                 goto error;
6536                         }
6537                         new_triggers.patterns[i].pattern =
6538                                 new_triggers.patterns[i].mask + mask_len;
6539                         memcpy(new_triggers.patterns[i].mask,
6540                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6541                                mask_len);
6542                         new_triggers.patterns[i].pattern_len = pat_len;
6543                         memcpy(new_triggers.patterns[i].pattern,
6544                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6545                                pat_len);
6546                         i++;
6547                 }
6548         }
6549
6550         if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
6551                 struct cfg80211_wowlan *ntrig;
6552                 ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
6553                                 GFP_KERNEL);
6554                 if (!ntrig) {
6555                         err = -ENOMEM;
6556                         goto error;
6557                 }
6558                 cfg80211_rdev_free_wowlan(rdev);
6559                 rdev->wowlan = ntrig;
6560         } else {
6561  no_triggers:
6562                 cfg80211_rdev_free_wowlan(rdev);
6563                 rdev->wowlan = NULL;
6564         }
6565
6566         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6567                 rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
6568
6569         return 0;
6570  error:
6571         for (i = 0; i < new_triggers.n_patterns; i++)
6572                 kfree(new_triggers.patterns[i].mask);
6573         kfree(new_triggers.patterns);
6574         return err;
6575 }
6576 #endif
6577
6578 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6579 {
6580         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6581         struct net_device *dev = info->user_ptr[1];
6582         struct wireless_dev *wdev = dev->ieee80211_ptr;
6583         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6584         struct cfg80211_gtk_rekey_data rekey_data;
6585         int err;
6586
6587         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6588                 return -EINVAL;
6589
6590         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6591                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6592                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6593                         nl80211_rekey_policy);
6594         if (err)
6595                 return err;
6596
6597         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6598                 return -ERANGE;
6599         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6600                 return -ERANGE;
6601         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6602                 return -ERANGE;
6603
6604         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6605                NL80211_KEK_LEN);
6606         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6607                NL80211_KCK_LEN);
6608         memcpy(rekey_data.replay_ctr,
6609                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6610                NL80211_REPLAY_CTR_LEN);
6611
6612         wdev_lock(wdev);
6613         if (!wdev->current_bss) {
6614                 err = -ENOTCONN;
6615                 goto out;
6616         }
6617
6618         if (!rdev->ops->set_rekey_data) {
6619                 err = -EOPNOTSUPP;
6620                 goto out;
6621         }
6622
6623         err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
6624  out:
6625         wdev_unlock(wdev);
6626         return err;
6627 }
6628
6629 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6630                                              struct genl_info *info)
6631 {
6632         struct net_device *dev = info->user_ptr[1];
6633         struct wireless_dev *wdev = dev->ieee80211_ptr;
6634
6635         if (wdev->iftype != NL80211_IFTYPE_AP &&
6636             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6637                 return -EINVAL;
6638
6639         if (wdev->ap_unexpected_nlpid)
6640                 return -EBUSY;
6641
6642         wdev->ap_unexpected_nlpid = info->snd_pid;
6643         return 0;
6644 }
6645
6646 static int nl80211_probe_client(struct sk_buff *skb,
6647                                 struct genl_info *info)
6648 {
6649         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6650         struct net_device *dev = info->user_ptr[1];
6651         struct wireless_dev *wdev = dev->ieee80211_ptr;
6652         struct sk_buff *msg;
6653         void *hdr;
6654         const u8 *addr;
6655         u64 cookie;
6656         int err;
6657
6658         if (wdev->iftype != NL80211_IFTYPE_AP &&
6659             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6660                 return -EOPNOTSUPP;
6661
6662         if (!info->attrs[NL80211_ATTR_MAC])
6663                 return -EINVAL;
6664
6665         if (!rdev->ops->probe_client)
6666                 return -EOPNOTSUPP;
6667
6668         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6669         if (!msg)
6670                 return -ENOMEM;
6671
6672         hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
6673                              NL80211_CMD_PROBE_CLIENT);
6674
6675         if (IS_ERR(hdr)) {
6676                 err = PTR_ERR(hdr);
6677                 goto free_msg;
6678         }
6679
6680         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
6681
6682         err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
6683         if (err)
6684                 goto free_msg;
6685
6686         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6687                 goto nla_put_failure;
6688
6689         genlmsg_end(msg, hdr);
6690
6691         return genlmsg_reply(msg, info);
6692
6693  nla_put_failure:
6694         err = -ENOBUFS;
6695  free_msg:
6696         nlmsg_free(msg);
6697         return err;
6698 }
6699
6700 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
6701 {
6702         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6703
6704         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
6705                 return -EOPNOTSUPP;
6706
6707         if (rdev->ap_beacons_nlpid)
6708                 return -EBUSY;
6709
6710         rdev->ap_beacons_nlpid = info->snd_pid;
6711
6712         return 0;
6713 }
6714
6715 #define NL80211_FLAG_NEED_WIPHY         0x01
6716 #define NL80211_FLAG_NEED_NETDEV        0x02
6717 #define NL80211_FLAG_NEED_RTNL          0x04
6718 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
6719 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
6720                                          NL80211_FLAG_CHECK_NETDEV_UP)
6721 #define NL80211_FLAG_NEED_WDEV          0x10
6722 /* If a netdev is associated, it must be UP */
6723 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
6724                                          NL80211_FLAG_CHECK_NETDEV_UP)
6725
6726 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
6727                             struct genl_info *info)
6728 {
6729         struct cfg80211_registered_device *rdev;
6730         struct wireless_dev *wdev;
6731         struct net_device *dev;
6732         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
6733
6734         if (rtnl)
6735                 rtnl_lock();
6736
6737         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
6738                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
6739                 if (IS_ERR(rdev)) {
6740                         if (rtnl)
6741                                 rtnl_unlock();
6742                         return PTR_ERR(rdev);
6743                 }
6744                 info->user_ptr[0] = rdev;
6745         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
6746                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
6747                 mutex_lock(&cfg80211_mutex);
6748                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
6749                                                   info->attrs);
6750                 if (IS_ERR(wdev)) {
6751                         mutex_unlock(&cfg80211_mutex);
6752                         if (rtnl)
6753                                 rtnl_unlock();
6754                         return PTR_ERR(wdev);
6755                 }
6756
6757                 dev = wdev->netdev;
6758                 rdev = wiphy_to_dev(wdev->wiphy);
6759
6760                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
6761                         if (!dev) {
6762                                 mutex_unlock(&cfg80211_mutex);
6763                                 if (rtnl)
6764                                         rtnl_unlock();
6765                                 return -EINVAL;
6766                         }
6767
6768                         info->user_ptr[1] = dev;
6769                 } else {
6770                         info->user_ptr[1] = wdev;
6771                 }
6772
6773                 if (dev) {
6774                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
6775                             !netif_running(dev)) {
6776                                 mutex_unlock(&cfg80211_mutex);
6777                                 if (rtnl)
6778                                         rtnl_unlock();
6779                                 return -ENETDOWN;
6780                         }
6781
6782                         dev_hold(dev);
6783                 }
6784
6785                 cfg80211_lock_rdev(rdev);
6786
6787                 mutex_unlock(&cfg80211_mutex);
6788
6789                 info->user_ptr[0] = rdev;
6790         }
6791
6792         return 0;
6793 }
6794
6795 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
6796                               struct genl_info *info)
6797 {
6798         if (info->user_ptr[0])
6799                 cfg80211_unlock_rdev(info->user_ptr[0]);
6800         if (info->user_ptr[1]) {
6801                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
6802                         struct wireless_dev *wdev = info->user_ptr[1];
6803
6804                         if (wdev->netdev)
6805                                 dev_put(wdev->netdev);
6806                 } else {
6807                         dev_put(info->user_ptr[1]);
6808                 }
6809         }
6810         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
6811                 rtnl_unlock();
6812 }
6813
6814 static struct genl_ops nl80211_ops[] = {
6815         {
6816                 .cmd = NL80211_CMD_GET_WIPHY,
6817                 .doit = nl80211_get_wiphy,
6818                 .dumpit = nl80211_dump_wiphy,
6819                 .policy = nl80211_policy,
6820                 /* can be retrieved by unprivileged users */
6821                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
6822         },
6823         {
6824                 .cmd = NL80211_CMD_SET_WIPHY,
6825                 .doit = nl80211_set_wiphy,
6826                 .policy = nl80211_policy,
6827                 .flags = GENL_ADMIN_PERM,
6828                 .internal_flags = NL80211_FLAG_NEED_RTNL,
6829         },
6830         {
6831                 .cmd = NL80211_CMD_GET_INTERFACE,
6832                 .doit = nl80211_get_interface,
6833                 .dumpit = nl80211_dump_interface,
6834                 .policy = nl80211_policy,
6835                 /* can be retrieved by unprivileged users */
6836                 .internal_flags = NL80211_FLAG_NEED_NETDEV,
6837         },
6838         {
6839                 .cmd = NL80211_CMD_SET_INTERFACE,
6840                 .doit = nl80211_set_interface,
6841                 .policy = nl80211_policy,
6842                 .flags = GENL_ADMIN_PERM,
6843                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6844                                   NL80211_FLAG_NEED_RTNL,
6845         },
6846         {
6847                 .cmd = NL80211_CMD_NEW_INTERFACE,
6848                 .doit = nl80211_new_interface,
6849                 .policy = nl80211_policy,
6850                 .flags = GENL_ADMIN_PERM,
6851                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
6852                                   NL80211_FLAG_NEED_RTNL,
6853         },
6854         {
6855                 .cmd = NL80211_CMD_DEL_INTERFACE,
6856                 .doit = nl80211_del_interface,
6857                 .policy = nl80211_policy,
6858                 .flags = GENL_ADMIN_PERM,
6859                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6860                                   NL80211_FLAG_NEED_RTNL,
6861         },
6862         {
6863                 .cmd = NL80211_CMD_GET_KEY,
6864                 .doit = nl80211_get_key,
6865                 .policy = nl80211_policy,
6866                 .flags = GENL_ADMIN_PERM,
6867                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6868                                   NL80211_FLAG_NEED_RTNL,
6869         },
6870         {
6871                 .cmd = NL80211_CMD_SET_KEY,
6872                 .doit = nl80211_set_key,
6873                 .policy = nl80211_policy,
6874                 .flags = GENL_ADMIN_PERM,
6875                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6876                                   NL80211_FLAG_NEED_RTNL,
6877         },
6878         {
6879                 .cmd = NL80211_CMD_NEW_KEY,
6880                 .doit = nl80211_new_key,
6881                 .policy = nl80211_policy,
6882                 .flags = GENL_ADMIN_PERM,
6883                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6884                                   NL80211_FLAG_NEED_RTNL,
6885         },
6886         {
6887                 .cmd = NL80211_CMD_DEL_KEY,
6888                 .doit = nl80211_del_key,
6889                 .policy = nl80211_policy,
6890                 .flags = GENL_ADMIN_PERM,
6891                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6892                                   NL80211_FLAG_NEED_RTNL,
6893         },
6894         {
6895                 .cmd = NL80211_CMD_SET_BEACON,
6896                 .policy = nl80211_policy,
6897                 .flags = GENL_ADMIN_PERM,
6898                 .doit = nl80211_set_beacon,
6899                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6900                                   NL80211_FLAG_NEED_RTNL,
6901         },
6902         {
6903                 .cmd = NL80211_CMD_START_AP,
6904                 .policy = nl80211_policy,
6905                 .flags = GENL_ADMIN_PERM,
6906                 .doit = nl80211_start_ap,
6907                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6908                                   NL80211_FLAG_NEED_RTNL,
6909         },
6910         {
6911                 .cmd = NL80211_CMD_STOP_AP,
6912                 .policy = nl80211_policy,
6913                 .flags = GENL_ADMIN_PERM,
6914                 .doit = nl80211_stop_ap,
6915                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6916                                   NL80211_FLAG_NEED_RTNL,
6917         },
6918         {
6919                 .cmd = NL80211_CMD_GET_STATION,
6920                 .doit = nl80211_get_station,
6921                 .dumpit = nl80211_dump_station,
6922                 .policy = nl80211_policy,
6923                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
6924                                   NL80211_FLAG_NEED_RTNL,
6925         },
6926         {
6927                 .cmd = NL80211_CMD_SET_STATION,
6928                 .doit = nl80211_set_station,
6929                 .policy = nl80211_policy,
6930                 .flags = GENL_ADMIN_PERM,
6931                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6932                                   NL80211_FLAG_NEED_RTNL,
6933         },
6934         {
6935                 .cmd = NL80211_CMD_NEW_STATION,
6936                 .doit = nl80211_new_station,
6937                 .policy = nl80211_policy,
6938                 .flags = GENL_ADMIN_PERM,
6939                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6940                                   NL80211_FLAG_NEED_RTNL,
6941         },
6942         {
6943                 .cmd = NL80211_CMD_DEL_STATION,
6944                 .doit = nl80211_del_station,
6945                 .policy = nl80211_policy,
6946                 .flags = GENL_ADMIN_PERM,
6947                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6948                                   NL80211_FLAG_NEED_RTNL,
6949         },
6950         {
6951                 .cmd = NL80211_CMD_GET_MPATH,
6952                 .doit = nl80211_get_mpath,
6953                 .dumpit = nl80211_dump_mpath,
6954                 .policy = nl80211_policy,
6955                 .flags = GENL_ADMIN_PERM,
6956                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6957                                   NL80211_FLAG_NEED_RTNL,
6958         },
6959         {
6960                 .cmd = NL80211_CMD_SET_MPATH,
6961                 .doit = nl80211_set_mpath,
6962                 .policy = nl80211_policy,
6963                 .flags = GENL_ADMIN_PERM,
6964                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6965                                   NL80211_FLAG_NEED_RTNL,
6966         },
6967         {
6968                 .cmd = NL80211_CMD_NEW_MPATH,
6969                 .doit = nl80211_new_mpath,
6970                 .policy = nl80211_policy,
6971                 .flags = GENL_ADMIN_PERM,
6972                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6973                                   NL80211_FLAG_NEED_RTNL,
6974         },
6975         {
6976                 .cmd = NL80211_CMD_DEL_MPATH,
6977                 .doit = nl80211_del_mpath,
6978                 .policy = nl80211_policy,
6979                 .flags = GENL_ADMIN_PERM,
6980                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6981                                   NL80211_FLAG_NEED_RTNL,
6982         },
6983         {
6984                 .cmd = NL80211_CMD_SET_BSS,
6985                 .doit = nl80211_set_bss,
6986                 .policy = nl80211_policy,
6987                 .flags = GENL_ADMIN_PERM,
6988                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
6989                                   NL80211_FLAG_NEED_RTNL,
6990         },
6991         {
6992                 .cmd = NL80211_CMD_GET_REG,
6993                 .doit = nl80211_get_reg,
6994                 .policy = nl80211_policy,
6995                 /* can be retrieved by unprivileged users */
6996         },
6997         {
6998                 .cmd = NL80211_CMD_SET_REG,
6999                 .doit = nl80211_set_reg,
7000                 .policy = nl80211_policy,
7001                 .flags = GENL_ADMIN_PERM,
7002         },
7003         {
7004                 .cmd = NL80211_CMD_REQ_SET_REG,
7005                 .doit = nl80211_req_set_reg,
7006                 .policy = nl80211_policy,
7007                 .flags = GENL_ADMIN_PERM,
7008         },
7009         {
7010                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7011                 .doit = nl80211_get_mesh_config,
7012                 .policy = nl80211_policy,
7013                 /* can be retrieved by unprivileged users */
7014                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7015                                   NL80211_FLAG_NEED_RTNL,
7016         },
7017         {
7018                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7019                 .doit = nl80211_update_mesh_config,
7020                 .policy = nl80211_policy,
7021                 .flags = GENL_ADMIN_PERM,
7022                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7023                                   NL80211_FLAG_NEED_RTNL,
7024         },
7025         {
7026                 .cmd = NL80211_CMD_TRIGGER_SCAN,
7027                 .doit = nl80211_trigger_scan,
7028                 .policy = nl80211_policy,
7029                 .flags = GENL_ADMIN_PERM,
7030                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7031                                   NL80211_FLAG_NEED_RTNL,
7032         },
7033         {
7034                 .cmd = NL80211_CMD_GET_SCAN,
7035                 .policy = nl80211_policy,
7036                 .dumpit = nl80211_dump_scan,
7037         },
7038         {
7039                 .cmd = NL80211_CMD_START_SCHED_SCAN,
7040                 .doit = nl80211_start_sched_scan,
7041                 .policy = nl80211_policy,
7042                 .flags = GENL_ADMIN_PERM,
7043                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7044                                   NL80211_FLAG_NEED_RTNL,
7045         },
7046         {
7047                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7048                 .doit = nl80211_stop_sched_scan,
7049                 .policy = nl80211_policy,
7050                 .flags = GENL_ADMIN_PERM,
7051                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7052                                   NL80211_FLAG_NEED_RTNL,
7053         },
7054         {
7055                 .cmd = NL80211_CMD_AUTHENTICATE,
7056                 .doit = nl80211_authenticate,
7057                 .policy = nl80211_policy,
7058                 .flags = GENL_ADMIN_PERM,
7059                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7060                                   NL80211_FLAG_NEED_RTNL,
7061         },
7062         {
7063                 .cmd = NL80211_CMD_ASSOCIATE,
7064                 .doit = nl80211_associate,
7065                 .policy = nl80211_policy,
7066                 .flags = GENL_ADMIN_PERM,
7067                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7068                                   NL80211_FLAG_NEED_RTNL,
7069         },
7070         {
7071                 .cmd = NL80211_CMD_DEAUTHENTICATE,
7072                 .doit = nl80211_deauthenticate,
7073                 .policy = nl80211_policy,
7074                 .flags = GENL_ADMIN_PERM,
7075                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7076                                   NL80211_FLAG_NEED_RTNL,
7077         },
7078         {
7079                 .cmd = NL80211_CMD_DISASSOCIATE,
7080                 .doit = nl80211_disassociate,
7081                 .policy = nl80211_policy,
7082                 .flags = GENL_ADMIN_PERM,
7083                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7084                                   NL80211_FLAG_NEED_RTNL,
7085         },
7086         {
7087                 .cmd = NL80211_CMD_JOIN_IBSS,
7088                 .doit = nl80211_join_ibss,
7089                 .policy = nl80211_policy,
7090                 .flags = GENL_ADMIN_PERM,
7091                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7092                                   NL80211_FLAG_NEED_RTNL,
7093         },
7094         {
7095                 .cmd = NL80211_CMD_LEAVE_IBSS,
7096                 .doit = nl80211_leave_ibss,
7097                 .policy = nl80211_policy,
7098                 .flags = GENL_ADMIN_PERM,
7099                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7100                                   NL80211_FLAG_NEED_RTNL,
7101         },
7102 #ifdef CONFIG_NL80211_TESTMODE
7103         {
7104                 .cmd = NL80211_CMD_TESTMODE,
7105                 .doit = nl80211_testmode_do,
7106                 .dumpit = nl80211_testmode_dump,
7107                 .policy = nl80211_policy,
7108                 .flags = GENL_ADMIN_PERM,
7109                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7110                                   NL80211_FLAG_NEED_RTNL,
7111         },
7112 #endif
7113         {
7114                 .cmd = NL80211_CMD_CONNECT,
7115                 .doit = nl80211_connect,
7116                 .policy = nl80211_policy,
7117                 .flags = GENL_ADMIN_PERM,
7118                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7119                                   NL80211_FLAG_NEED_RTNL,
7120         },
7121         {
7122                 .cmd = NL80211_CMD_DISCONNECT,
7123                 .doit = nl80211_disconnect,
7124                 .policy = nl80211_policy,
7125                 .flags = GENL_ADMIN_PERM,
7126                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7127                                   NL80211_FLAG_NEED_RTNL,
7128         },
7129         {
7130                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7131                 .doit = nl80211_wiphy_netns,
7132                 .policy = nl80211_policy,
7133                 .flags = GENL_ADMIN_PERM,
7134                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7135                                   NL80211_FLAG_NEED_RTNL,
7136         },
7137         {
7138                 .cmd = NL80211_CMD_GET_SURVEY,
7139                 .policy = nl80211_policy,
7140                 .dumpit = nl80211_dump_survey,
7141         },
7142         {
7143                 .cmd = NL80211_CMD_SET_PMKSA,
7144                 .doit = nl80211_setdel_pmksa,
7145                 .policy = nl80211_policy,
7146                 .flags = GENL_ADMIN_PERM,
7147                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7148                                   NL80211_FLAG_NEED_RTNL,
7149         },
7150         {
7151                 .cmd = NL80211_CMD_DEL_PMKSA,
7152                 .doit = nl80211_setdel_pmksa,
7153                 .policy = nl80211_policy,
7154                 .flags = GENL_ADMIN_PERM,
7155                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7156                                   NL80211_FLAG_NEED_RTNL,
7157         },
7158         {
7159                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7160                 .doit = nl80211_flush_pmksa,
7161                 .policy = nl80211_policy,
7162                 .flags = GENL_ADMIN_PERM,
7163                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7164                                   NL80211_FLAG_NEED_RTNL,
7165         },
7166         {
7167                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7168                 .doit = nl80211_remain_on_channel,
7169                 .policy = nl80211_policy,
7170                 .flags = GENL_ADMIN_PERM,
7171                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7172                                   NL80211_FLAG_NEED_RTNL,
7173         },
7174         {
7175                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7176                 .doit = nl80211_cancel_remain_on_channel,
7177                 .policy = nl80211_policy,
7178                 .flags = GENL_ADMIN_PERM,
7179                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7180                                   NL80211_FLAG_NEED_RTNL,
7181         },
7182         {
7183                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7184                 .doit = nl80211_set_tx_bitrate_mask,
7185                 .policy = nl80211_policy,
7186                 .flags = GENL_ADMIN_PERM,
7187                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7188                                   NL80211_FLAG_NEED_RTNL,
7189         },
7190         {
7191                 .cmd = NL80211_CMD_REGISTER_FRAME,
7192                 .doit = nl80211_register_mgmt,
7193                 .policy = nl80211_policy,
7194                 .flags = GENL_ADMIN_PERM,
7195                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7196                                   NL80211_FLAG_NEED_RTNL,
7197         },
7198         {
7199                 .cmd = NL80211_CMD_FRAME,
7200                 .doit = nl80211_tx_mgmt,
7201                 .policy = nl80211_policy,
7202                 .flags = GENL_ADMIN_PERM,
7203                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7204                                   NL80211_FLAG_NEED_RTNL,
7205         },
7206         {
7207                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7208                 .doit = nl80211_tx_mgmt_cancel_wait,
7209                 .policy = nl80211_policy,
7210                 .flags = GENL_ADMIN_PERM,
7211                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7212                                   NL80211_FLAG_NEED_RTNL,
7213         },
7214         {
7215                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7216                 .doit = nl80211_set_power_save,
7217                 .policy = nl80211_policy,
7218                 .flags = GENL_ADMIN_PERM,
7219                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7220                                   NL80211_FLAG_NEED_RTNL,
7221         },
7222         {
7223                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7224                 .doit = nl80211_get_power_save,
7225                 .policy = nl80211_policy,
7226                 /* can be retrieved by unprivileged users */
7227                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7228                                   NL80211_FLAG_NEED_RTNL,
7229         },
7230         {
7231                 .cmd = NL80211_CMD_SET_CQM,
7232                 .doit = nl80211_set_cqm,
7233                 .policy = nl80211_policy,
7234                 .flags = GENL_ADMIN_PERM,
7235                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7236                                   NL80211_FLAG_NEED_RTNL,
7237         },
7238         {
7239                 .cmd = NL80211_CMD_SET_CHANNEL,
7240                 .doit = nl80211_set_channel,
7241                 .policy = nl80211_policy,
7242                 .flags = GENL_ADMIN_PERM,
7243                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7244                                   NL80211_FLAG_NEED_RTNL,
7245         },
7246         {
7247                 .cmd = NL80211_CMD_SET_WDS_PEER,
7248                 .doit = nl80211_set_wds_peer,
7249                 .policy = nl80211_policy,
7250                 .flags = GENL_ADMIN_PERM,
7251                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7252                                   NL80211_FLAG_NEED_RTNL,
7253         },
7254         {
7255                 .cmd = NL80211_CMD_JOIN_MESH,
7256                 .doit = nl80211_join_mesh,
7257                 .policy = nl80211_policy,
7258                 .flags = GENL_ADMIN_PERM,
7259                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7260                                   NL80211_FLAG_NEED_RTNL,
7261         },
7262         {
7263                 .cmd = NL80211_CMD_LEAVE_MESH,
7264                 .doit = nl80211_leave_mesh,
7265                 .policy = nl80211_policy,
7266                 .flags = GENL_ADMIN_PERM,
7267                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7268                                   NL80211_FLAG_NEED_RTNL,
7269         },
7270 #ifdef CONFIG_PM
7271         {
7272                 .cmd = NL80211_CMD_GET_WOWLAN,
7273                 .doit = nl80211_get_wowlan,
7274                 .policy = nl80211_policy,
7275                 /* can be retrieved by unprivileged users */
7276                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7277                                   NL80211_FLAG_NEED_RTNL,
7278         },
7279         {
7280                 .cmd = NL80211_CMD_SET_WOWLAN,
7281                 .doit = nl80211_set_wowlan,
7282                 .policy = nl80211_policy,
7283                 .flags = GENL_ADMIN_PERM,
7284                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7285                                   NL80211_FLAG_NEED_RTNL,
7286         },
7287 #endif
7288         {
7289                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7290                 .doit = nl80211_set_rekey_data,
7291                 .policy = nl80211_policy,
7292                 .flags = GENL_ADMIN_PERM,
7293                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7294                                   NL80211_FLAG_NEED_RTNL,
7295         },
7296         {
7297                 .cmd = NL80211_CMD_TDLS_MGMT,
7298                 .doit = nl80211_tdls_mgmt,
7299                 .policy = nl80211_policy,
7300                 .flags = GENL_ADMIN_PERM,
7301                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7302                                   NL80211_FLAG_NEED_RTNL,
7303         },
7304         {
7305                 .cmd = NL80211_CMD_TDLS_OPER,
7306                 .doit = nl80211_tdls_oper,
7307                 .policy = nl80211_policy,
7308                 .flags = GENL_ADMIN_PERM,
7309                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7310                                   NL80211_FLAG_NEED_RTNL,
7311         },
7312         {
7313                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7314                 .doit = nl80211_register_unexpected_frame,
7315                 .policy = nl80211_policy,
7316                 .flags = GENL_ADMIN_PERM,
7317                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7318                                   NL80211_FLAG_NEED_RTNL,
7319         },
7320         {
7321                 .cmd = NL80211_CMD_PROBE_CLIENT,
7322                 .doit = nl80211_probe_client,
7323                 .policy = nl80211_policy,
7324                 .flags = GENL_ADMIN_PERM,
7325                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7326                                   NL80211_FLAG_NEED_RTNL,
7327         },
7328         {
7329                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7330                 .doit = nl80211_register_beacons,
7331                 .policy = nl80211_policy,
7332                 .flags = GENL_ADMIN_PERM,
7333                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7334                                   NL80211_FLAG_NEED_RTNL,
7335         },
7336         {
7337                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7338                 .doit = nl80211_set_noack_map,
7339                 .policy = nl80211_policy,
7340                 .flags = GENL_ADMIN_PERM,
7341                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7342                                   NL80211_FLAG_NEED_RTNL,
7343         },
7344
7345 };
7346
7347 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7348         .name = "mlme",
7349 };
7350
7351 /* multicast groups */
7352 static struct genl_multicast_group nl80211_config_mcgrp = {
7353         .name = "config",
7354 };
7355 static struct genl_multicast_group nl80211_scan_mcgrp = {
7356         .name = "scan",
7357 };
7358 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7359         .name = "regulatory",
7360 };
7361
7362 /* notification functions */
7363
7364 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7365 {
7366         struct sk_buff *msg;
7367
7368         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7369         if (!msg)
7370                 return;
7371
7372         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7373                 nlmsg_free(msg);
7374                 return;
7375         }
7376
7377         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7378                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7379 }
7380
7381 static int nl80211_add_scan_req(struct sk_buff *msg,
7382                                 struct cfg80211_registered_device *rdev)
7383 {
7384         struct cfg80211_scan_request *req = rdev->scan_req;
7385         struct nlattr *nest;
7386         int i;
7387
7388         ASSERT_RDEV_LOCK(rdev);
7389
7390         if (WARN_ON(!req))
7391                 return 0;
7392
7393         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7394         if (!nest)
7395                 goto nla_put_failure;
7396         for (i = 0; i < req->n_ssids; i++) {
7397                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7398                         goto nla_put_failure;
7399         }
7400         nla_nest_end(msg, nest);
7401
7402         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7403         if (!nest)
7404                 goto nla_put_failure;
7405         for (i = 0; i < req->n_channels; i++) {
7406                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7407                         goto nla_put_failure;
7408         }
7409         nla_nest_end(msg, nest);
7410
7411         if (req->ie &&
7412             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7413                 goto nla_put_failure;
7414
7415         return 0;
7416  nla_put_failure:
7417         return -ENOBUFS;
7418 }
7419
7420 static int nl80211_send_scan_msg(struct sk_buff *msg,
7421                                  struct cfg80211_registered_device *rdev,
7422                                  struct net_device *netdev,
7423                                  u32 pid, u32 seq, int flags,
7424                                  u32 cmd)
7425 {
7426         void *hdr;
7427
7428         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7429         if (!hdr)
7430                 return -1;
7431
7432         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7433             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7434                 goto nla_put_failure;
7435
7436         /* ignore errors and send incomplete event anyway */
7437         nl80211_add_scan_req(msg, rdev);
7438
7439         return genlmsg_end(msg, hdr);
7440
7441  nla_put_failure:
7442         genlmsg_cancel(msg, hdr);
7443         return -EMSGSIZE;
7444 }
7445
7446 static int
7447 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7448                             struct cfg80211_registered_device *rdev,
7449                             struct net_device *netdev,
7450                             u32 pid, u32 seq, int flags, u32 cmd)
7451 {
7452         void *hdr;
7453
7454         hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
7455         if (!hdr)
7456                 return -1;
7457
7458         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7459             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7460                 goto nla_put_failure;
7461
7462         return genlmsg_end(msg, hdr);
7463
7464  nla_put_failure:
7465         genlmsg_cancel(msg, hdr);
7466         return -EMSGSIZE;
7467 }
7468
7469 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7470                              struct net_device *netdev)
7471 {
7472         struct sk_buff *msg;
7473
7474         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7475         if (!msg)
7476                 return;
7477
7478         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7479                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7480                 nlmsg_free(msg);
7481                 return;
7482         }
7483
7484         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7485                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7486 }
7487
7488 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7489                             struct net_device *netdev)
7490 {
7491         struct sk_buff *msg;
7492
7493         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7494         if (!msg)
7495                 return;
7496
7497         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7498                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7499                 nlmsg_free(msg);
7500                 return;
7501         }
7502
7503         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7504                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7505 }
7506
7507 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7508                                struct net_device *netdev)
7509 {
7510         struct sk_buff *msg;
7511
7512         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7513         if (!msg)
7514                 return;
7515
7516         if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
7517                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7518                 nlmsg_free(msg);
7519                 return;
7520         }
7521
7522         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7523                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7524 }
7525
7526 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7527                                      struct net_device *netdev)
7528 {
7529         struct sk_buff *msg;
7530
7531         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7532         if (!msg)
7533                 return;
7534
7535         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7536                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
7537                 nlmsg_free(msg);
7538                 return;
7539         }
7540
7541         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7542                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7543 }
7544
7545 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
7546                              struct net_device *netdev, u32 cmd)
7547 {
7548         struct sk_buff *msg;
7549
7550         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7551         if (!msg)
7552                 return;
7553
7554         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
7555                 nlmsg_free(msg);
7556                 return;
7557         }
7558
7559         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7560                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7561 }
7562
7563 /*
7564  * This can happen on global regulatory changes or device specific settings
7565  * based on custom world regulatory domains.
7566  */
7567 void nl80211_send_reg_change_event(struct regulatory_request *request)
7568 {
7569         struct sk_buff *msg;
7570         void *hdr;
7571
7572         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7573         if (!msg)
7574                 return;
7575
7576         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
7577         if (!hdr) {
7578                 nlmsg_free(msg);
7579                 return;
7580         }
7581
7582         /* Userspace can always count this one always being set */
7583         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
7584                 goto nla_put_failure;
7585
7586         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
7587                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7588                                NL80211_REGDOM_TYPE_WORLD))
7589                         goto nla_put_failure;
7590         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
7591                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7592                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
7593                         goto nla_put_failure;
7594         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
7595                    request->intersect) {
7596                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7597                                NL80211_REGDOM_TYPE_INTERSECTION))
7598                         goto nla_put_failure;
7599         } else {
7600                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
7601                                NL80211_REGDOM_TYPE_COUNTRY) ||
7602                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
7603                                    request->alpha2))
7604                         goto nla_put_failure;
7605         }
7606
7607         if (wiphy_idx_valid(request->wiphy_idx) &&
7608             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
7609                 goto nla_put_failure;
7610
7611         genlmsg_end(msg, hdr);
7612
7613         rcu_read_lock();
7614         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
7615                                 GFP_ATOMIC);
7616         rcu_read_unlock();
7617
7618         return;
7619
7620 nla_put_failure:
7621         genlmsg_cancel(msg, hdr);
7622         nlmsg_free(msg);
7623 }
7624
7625 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
7626                                     struct net_device *netdev,
7627                                     const u8 *buf, size_t len,
7628                                     enum nl80211_commands cmd, gfp_t gfp)
7629 {
7630         struct sk_buff *msg;
7631         void *hdr;
7632
7633         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7634         if (!msg)
7635                 return;
7636
7637         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7638         if (!hdr) {
7639                 nlmsg_free(msg);
7640                 return;
7641         }
7642
7643         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7644             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7645             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
7646                 goto nla_put_failure;
7647
7648         genlmsg_end(msg, hdr);
7649
7650         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7651                                 nl80211_mlme_mcgrp.id, gfp);
7652         return;
7653
7654  nla_put_failure:
7655         genlmsg_cancel(msg, hdr);
7656         nlmsg_free(msg);
7657 }
7658
7659 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
7660                           struct net_device *netdev, const u8 *buf,
7661                           size_t len, gfp_t gfp)
7662 {
7663         nl80211_send_mlme_event(rdev, netdev, buf, len,
7664                                 NL80211_CMD_AUTHENTICATE, gfp);
7665 }
7666
7667 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
7668                            struct net_device *netdev, const u8 *buf,
7669                            size_t len, gfp_t gfp)
7670 {
7671         nl80211_send_mlme_event(rdev, netdev, buf, len,
7672                                 NL80211_CMD_ASSOCIATE, gfp);
7673 }
7674
7675 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
7676                          struct net_device *netdev, const u8 *buf,
7677                          size_t len, gfp_t gfp)
7678 {
7679         nl80211_send_mlme_event(rdev, netdev, buf, len,
7680                                 NL80211_CMD_DEAUTHENTICATE, gfp);
7681 }
7682
7683 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
7684                            struct net_device *netdev, const u8 *buf,
7685                            size_t len, gfp_t gfp)
7686 {
7687         nl80211_send_mlme_event(rdev, netdev, buf, len,
7688                                 NL80211_CMD_DISASSOCIATE, gfp);
7689 }
7690
7691 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
7692                                 struct net_device *netdev, const u8 *buf,
7693                                 size_t len, gfp_t gfp)
7694 {
7695         nl80211_send_mlme_event(rdev, netdev, buf, len,
7696                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
7697 }
7698
7699 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
7700                                   struct net_device *netdev, const u8 *buf,
7701                                   size_t len, gfp_t gfp)
7702 {
7703         nl80211_send_mlme_event(rdev, netdev, buf, len,
7704                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
7705 }
7706
7707 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
7708                                       struct net_device *netdev, int cmd,
7709                                       const u8 *addr, gfp_t gfp)
7710 {
7711         struct sk_buff *msg;
7712         void *hdr;
7713
7714         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7715         if (!msg)
7716                 return;
7717
7718         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
7719         if (!hdr) {
7720                 nlmsg_free(msg);
7721                 return;
7722         }
7723
7724         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7725             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7726             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
7727             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
7728                 goto nla_put_failure;
7729
7730         genlmsg_end(msg, hdr);
7731
7732         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7733                                 nl80211_mlme_mcgrp.id, gfp);
7734         return;
7735
7736  nla_put_failure:
7737         genlmsg_cancel(msg, hdr);
7738         nlmsg_free(msg);
7739 }
7740
7741 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
7742                                struct net_device *netdev, const u8 *addr,
7743                                gfp_t gfp)
7744 {
7745         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
7746                                   addr, gfp);
7747 }
7748
7749 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
7750                                 struct net_device *netdev, const u8 *addr,
7751                                 gfp_t gfp)
7752 {
7753         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
7754                                   addr, gfp);
7755 }
7756
7757 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
7758                                  struct net_device *netdev, const u8 *bssid,
7759                                  const u8 *req_ie, size_t req_ie_len,
7760                                  const u8 *resp_ie, size_t resp_ie_len,
7761                                  u16 status, gfp_t gfp)
7762 {
7763         struct sk_buff *msg;
7764         void *hdr;
7765
7766         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7767         if (!msg)
7768                 return;
7769
7770         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
7771         if (!hdr) {
7772                 nlmsg_free(msg);
7773                 return;
7774         }
7775
7776         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7777             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7778             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
7779             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
7780             (req_ie &&
7781              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7782             (resp_ie &&
7783              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7784                 goto nla_put_failure;
7785
7786         genlmsg_end(msg, hdr);
7787
7788         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7789                                 nl80211_mlme_mcgrp.id, gfp);
7790         return;
7791
7792  nla_put_failure:
7793         genlmsg_cancel(msg, hdr);
7794         nlmsg_free(msg);
7795
7796 }
7797
7798 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
7799                          struct net_device *netdev, const u8 *bssid,
7800                          const u8 *req_ie, size_t req_ie_len,
7801                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
7802 {
7803         struct sk_buff *msg;
7804         void *hdr;
7805
7806         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
7807         if (!msg)
7808                 return;
7809
7810         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
7811         if (!hdr) {
7812                 nlmsg_free(msg);
7813                 return;
7814         }
7815
7816         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7817             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7818             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
7819             (req_ie &&
7820              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
7821             (resp_ie &&
7822              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
7823                 goto nla_put_failure;
7824
7825         genlmsg_end(msg, hdr);
7826
7827         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7828                                 nl80211_mlme_mcgrp.id, gfp);
7829         return;
7830
7831  nla_put_failure:
7832         genlmsg_cancel(msg, hdr);
7833         nlmsg_free(msg);
7834
7835 }
7836
7837 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
7838                                struct net_device *netdev, u16 reason,
7839                                const u8 *ie, size_t ie_len, bool from_ap)
7840 {
7841         struct sk_buff *msg;
7842         void *hdr;
7843
7844         msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
7845         if (!msg)
7846                 return;
7847
7848         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
7849         if (!hdr) {
7850                 nlmsg_free(msg);
7851                 return;
7852         }
7853
7854         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7855             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7856             (from_ap && reason &&
7857              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
7858             (from_ap &&
7859              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
7860             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
7861                 goto nla_put_failure;
7862
7863         genlmsg_end(msg, hdr);
7864
7865         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7866                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
7867         return;
7868
7869  nla_put_failure:
7870         genlmsg_cancel(msg, hdr);
7871         nlmsg_free(msg);
7872
7873 }
7874
7875 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
7876                              struct net_device *netdev, const u8 *bssid,
7877                              gfp_t gfp)
7878 {
7879         struct sk_buff *msg;
7880         void *hdr;
7881
7882         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7883         if (!msg)
7884                 return;
7885
7886         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
7887         if (!hdr) {
7888                 nlmsg_free(msg);
7889                 return;
7890         }
7891
7892         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7893             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7894             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
7895                 goto nla_put_failure;
7896
7897         genlmsg_end(msg, hdr);
7898
7899         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7900                                 nl80211_mlme_mcgrp.id, gfp);
7901         return;
7902
7903  nla_put_failure:
7904         genlmsg_cancel(msg, hdr);
7905         nlmsg_free(msg);
7906 }
7907
7908 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
7909                 struct net_device *netdev,
7910                 const u8 *macaddr, const u8* ie, u8 ie_len,
7911                 gfp_t gfp)
7912 {
7913         struct sk_buff *msg;
7914         void *hdr;
7915
7916         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7917         if (!msg)
7918                 return;
7919
7920         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
7921         if (!hdr) {
7922                 nlmsg_free(msg);
7923                 return;
7924         }
7925
7926         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7927             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7928             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
7929             (ie_len && ie &&
7930              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
7931                 goto nla_put_failure;
7932
7933         genlmsg_end(msg, hdr);
7934
7935         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7936                                 nl80211_mlme_mcgrp.id, gfp);
7937         return;
7938
7939  nla_put_failure:
7940         genlmsg_cancel(msg, hdr);
7941         nlmsg_free(msg);
7942 }
7943
7944 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
7945                                  struct net_device *netdev, const u8 *addr,
7946                                  enum nl80211_key_type key_type, int key_id,
7947                                  const u8 *tsc, gfp_t gfp)
7948 {
7949         struct sk_buff *msg;
7950         void *hdr;
7951
7952         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
7953         if (!msg)
7954                 return;
7955
7956         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
7957         if (!hdr) {
7958                 nlmsg_free(msg);
7959                 return;
7960         }
7961
7962         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7963             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
7964             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
7965             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
7966             (key_id != -1 &&
7967              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
7968             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
7969                 goto nla_put_failure;
7970
7971         genlmsg_end(msg, hdr);
7972
7973         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7974                                 nl80211_mlme_mcgrp.id, gfp);
7975         return;
7976
7977  nla_put_failure:
7978         genlmsg_cancel(msg, hdr);
7979         nlmsg_free(msg);
7980 }
7981
7982 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
7983                                     struct ieee80211_channel *channel_before,
7984                                     struct ieee80211_channel *channel_after)
7985 {
7986         struct sk_buff *msg;
7987         void *hdr;
7988         struct nlattr *nl_freq;
7989
7990         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
7991         if (!msg)
7992                 return;
7993
7994         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
7995         if (!hdr) {
7996                 nlmsg_free(msg);
7997                 return;
7998         }
7999
8000         /*
8001          * Since we are applying the beacon hint to a wiphy we know its
8002          * wiphy_idx is valid
8003          */
8004         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8005                 goto nla_put_failure;
8006
8007         /* Before */
8008         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8009         if (!nl_freq)
8010                 goto nla_put_failure;
8011         if (nl80211_msg_put_channel(msg, channel_before))
8012                 goto nla_put_failure;
8013         nla_nest_end(msg, nl_freq);
8014
8015         /* After */
8016         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8017         if (!nl_freq)
8018                 goto nla_put_failure;
8019         if (nl80211_msg_put_channel(msg, channel_after))
8020                 goto nla_put_failure;
8021         nla_nest_end(msg, nl_freq);
8022
8023         genlmsg_end(msg, hdr);
8024
8025         rcu_read_lock();
8026         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8027                                 GFP_ATOMIC);
8028         rcu_read_unlock();
8029
8030         return;
8031
8032 nla_put_failure:
8033         genlmsg_cancel(msg, hdr);
8034         nlmsg_free(msg);
8035 }
8036
8037 static void nl80211_send_remain_on_chan_event(
8038         int cmd, struct cfg80211_registered_device *rdev,
8039         struct net_device *netdev, u64 cookie,
8040         struct ieee80211_channel *chan,
8041         enum nl80211_channel_type channel_type,
8042         unsigned int duration, gfp_t gfp)
8043 {
8044         struct sk_buff *msg;
8045         void *hdr;
8046
8047         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8048         if (!msg)
8049                 return;
8050
8051         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8052         if (!hdr) {
8053                 nlmsg_free(msg);
8054                 return;
8055         }
8056
8057         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8058             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8059             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8060             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
8061             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8062                 goto nla_put_failure;
8063
8064         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8065             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8066                 goto nla_put_failure;
8067
8068         genlmsg_end(msg, hdr);
8069
8070         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8071                                 nl80211_mlme_mcgrp.id, gfp);
8072         return;
8073
8074  nla_put_failure:
8075         genlmsg_cancel(msg, hdr);
8076         nlmsg_free(msg);
8077 }
8078
8079 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8080                                     struct net_device *netdev, u64 cookie,
8081                                     struct ieee80211_channel *chan,
8082                                     enum nl80211_channel_type channel_type,
8083                                     unsigned int duration, gfp_t gfp)
8084 {
8085         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8086                                           rdev, netdev, cookie, chan,
8087                                           channel_type, duration, gfp);
8088 }
8089
8090 void nl80211_send_remain_on_channel_cancel(
8091         struct cfg80211_registered_device *rdev, struct net_device *netdev,
8092         u64 cookie, struct ieee80211_channel *chan,
8093         enum nl80211_channel_type channel_type, gfp_t gfp)
8094 {
8095         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8096                                           rdev, netdev, cookie, chan,
8097                                           channel_type, 0, gfp);
8098 }
8099
8100 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8101                             struct net_device *dev, const u8 *mac_addr,
8102                             struct station_info *sinfo, gfp_t gfp)
8103 {
8104         struct sk_buff *msg;
8105
8106         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8107         if (!msg)
8108                 return;
8109
8110         if (nl80211_send_station(msg, 0, 0, 0,
8111                                  rdev, dev, mac_addr, sinfo) < 0) {
8112                 nlmsg_free(msg);
8113                 return;
8114         }
8115
8116         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8117                                 nl80211_mlme_mcgrp.id, gfp);
8118 }
8119
8120 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8121                                 struct net_device *dev, const u8 *mac_addr,
8122                                 gfp_t gfp)
8123 {
8124         struct sk_buff *msg;
8125         void *hdr;
8126
8127         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8128         if (!msg)
8129                 return;
8130
8131         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8132         if (!hdr) {
8133                 nlmsg_free(msg);
8134                 return;
8135         }
8136
8137         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8138             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8139                 goto nla_put_failure;
8140
8141         genlmsg_end(msg, hdr);
8142
8143         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8144                                 nl80211_mlme_mcgrp.id, gfp);
8145         return;
8146
8147  nla_put_failure:
8148         genlmsg_cancel(msg, hdr);
8149         nlmsg_free(msg);
8150 }
8151
8152 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8153                                        const u8 *addr, gfp_t gfp)
8154 {
8155         struct wireless_dev *wdev = dev->ieee80211_ptr;
8156         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8157         struct sk_buff *msg;
8158         void *hdr;
8159         int err;
8160         u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
8161
8162         if (!nlpid)
8163                 return false;
8164
8165         msg = nlmsg_new(100, gfp);
8166         if (!msg)
8167                 return true;
8168
8169         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8170         if (!hdr) {
8171                 nlmsg_free(msg);
8172                 return true;
8173         }
8174
8175         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8176             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8177             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8178                 goto nla_put_failure;
8179
8180         err = genlmsg_end(msg, hdr);
8181         if (err < 0) {
8182                 nlmsg_free(msg);
8183                 return true;
8184         }
8185
8186         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8187         return true;
8188
8189  nla_put_failure:
8190         genlmsg_cancel(msg, hdr);
8191         nlmsg_free(msg);
8192         return true;
8193 }
8194
8195 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8196 {
8197         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8198                                           addr, gfp);
8199 }
8200
8201 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8202                                     const u8 *addr, gfp_t gfp)
8203 {
8204         return __nl80211_unexpected_frame(dev,
8205                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8206                                           addr, gfp);
8207 }
8208
8209 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8210                       struct net_device *netdev, u32 nlpid,
8211                       int freq, int sig_dbm,
8212                       const u8 *buf, size_t len, gfp_t gfp)
8213 {
8214         struct sk_buff *msg;
8215         void *hdr;
8216
8217         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8218         if (!msg)
8219                 return -ENOMEM;
8220
8221         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8222         if (!hdr) {
8223                 nlmsg_free(msg);
8224                 return -ENOMEM;
8225         }
8226
8227         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8228             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8229             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8230             (sig_dbm &&
8231              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8232             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8233                 goto nla_put_failure;
8234
8235         genlmsg_end(msg, hdr);
8236
8237         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8238
8239  nla_put_failure:
8240         genlmsg_cancel(msg, hdr);
8241         nlmsg_free(msg);
8242         return -ENOBUFS;
8243 }
8244
8245 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8246                                  struct net_device *netdev, u64 cookie,
8247                                  const u8 *buf, size_t len, bool ack,
8248                                  gfp_t gfp)
8249 {
8250         struct sk_buff *msg;
8251         void *hdr;
8252
8253         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8254         if (!msg)
8255                 return;
8256
8257         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8258         if (!hdr) {
8259                 nlmsg_free(msg);
8260                 return;
8261         }
8262
8263         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8264             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8265             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8266             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8267             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8268                 goto nla_put_failure;
8269
8270         genlmsg_end(msg, hdr);
8271
8272         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8273         return;
8274
8275  nla_put_failure:
8276         genlmsg_cancel(msg, hdr);
8277         nlmsg_free(msg);
8278 }
8279
8280 void
8281 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8282                              struct net_device *netdev,
8283                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8284                              gfp_t gfp)
8285 {
8286         struct sk_buff *msg;
8287         struct nlattr *pinfoattr;
8288         void *hdr;
8289
8290         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8291         if (!msg)
8292                 return;
8293
8294         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8295         if (!hdr) {
8296                 nlmsg_free(msg);
8297                 return;
8298         }
8299
8300         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8301             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8302                 goto nla_put_failure;
8303
8304         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8305         if (!pinfoattr)
8306                 goto nla_put_failure;
8307
8308         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8309                         rssi_event))
8310                 goto nla_put_failure;
8311
8312         nla_nest_end(msg, pinfoattr);
8313
8314         genlmsg_end(msg, hdr);
8315
8316         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8317                                 nl80211_mlme_mcgrp.id, gfp);
8318         return;
8319
8320  nla_put_failure:
8321         genlmsg_cancel(msg, hdr);
8322         nlmsg_free(msg);
8323 }
8324
8325 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8326                               struct net_device *netdev, const u8 *bssid,
8327                               const u8 *replay_ctr, gfp_t gfp)
8328 {
8329         struct sk_buff *msg;
8330         struct nlattr *rekey_attr;
8331         void *hdr;
8332
8333         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8334         if (!msg)
8335                 return;
8336
8337         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8338         if (!hdr) {
8339                 nlmsg_free(msg);
8340                 return;
8341         }
8342
8343         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8344             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8345             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8346                 goto nla_put_failure;
8347
8348         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8349         if (!rekey_attr)
8350                 goto nla_put_failure;
8351
8352         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8353                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8354                 goto nla_put_failure;
8355
8356         nla_nest_end(msg, rekey_attr);
8357
8358         genlmsg_end(msg, hdr);
8359
8360         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8361                                 nl80211_mlme_mcgrp.id, gfp);
8362         return;
8363
8364  nla_put_failure:
8365         genlmsg_cancel(msg, hdr);
8366         nlmsg_free(msg);
8367 }
8368
8369 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8370                                     struct net_device *netdev, int index,
8371                                     const u8 *bssid, bool preauth, gfp_t gfp)
8372 {
8373         struct sk_buff *msg;
8374         struct nlattr *attr;
8375         void *hdr;
8376
8377         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8378         if (!msg)
8379                 return;
8380
8381         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8382         if (!hdr) {
8383                 nlmsg_free(msg);
8384                 return;
8385         }
8386
8387         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8388             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8389                 goto nla_put_failure;
8390
8391         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8392         if (!attr)
8393                 goto nla_put_failure;
8394
8395         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8396             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8397             (preauth &&
8398              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8399                 goto nla_put_failure;
8400
8401         nla_nest_end(msg, attr);
8402
8403         genlmsg_end(msg, hdr);
8404
8405         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8406                                 nl80211_mlme_mcgrp.id, gfp);
8407         return;
8408
8409  nla_put_failure:
8410         genlmsg_cancel(msg, hdr);
8411         nlmsg_free(msg);
8412 }
8413
8414 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8415                               struct net_device *netdev, int freq,
8416                               enum nl80211_channel_type type, gfp_t gfp)
8417 {
8418         struct sk_buff *msg;
8419         void *hdr;
8420
8421         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8422         if (!msg)
8423                 return;
8424
8425         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8426         if (!hdr) {
8427                 nlmsg_free(msg);
8428                 return;
8429         }
8430
8431         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8432             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8433             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
8434                 goto nla_put_failure;
8435
8436         genlmsg_end(msg, hdr);
8437
8438         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8439                                 nl80211_mlme_mcgrp.id, gfp);
8440         return;
8441
8442  nla_put_failure:
8443         genlmsg_cancel(msg, hdr);
8444         nlmsg_free(msg);
8445 }
8446
8447 void
8448 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
8449                                 struct net_device *netdev, const u8 *peer,
8450                                 u32 num_packets, gfp_t gfp)
8451 {
8452         struct sk_buff *msg;
8453         struct nlattr *pinfoattr;
8454         void *hdr;
8455
8456         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8457         if (!msg)
8458                 return;
8459
8460         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8461         if (!hdr) {
8462                 nlmsg_free(msg);
8463                 return;
8464         }
8465
8466         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8467             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8468             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8469                 goto nla_put_failure;
8470
8471         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8472         if (!pinfoattr)
8473                 goto nla_put_failure;
8474
8475         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
8476                 goto nla_put_failure;
8477
8478         nla_nest_end(msg, pinfoattr);
8479
8480         genlmsg_end(msg, hdr);
8481
8482         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8483                                 nl80211_mlme_mcgrp.id, gfp);
8484         return;
8485
8486  nla_put_failure:
8487         genlmsg_cancel(msg, hdr);
8488         nlmsg_free(msg);
8489 }
8490
8491 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
8492                            u64 cookie, bool acked, gfp_t gfp)
8493 {
8494         struct wireless_dev *wdev = dev->ieee80211_ptr;
8495         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8496         struct sk_buff *msg;
8497         void *hdr;
8498         int err;
8499
8500         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8501         if (!msg)
8502                 return;
8503
8504         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
8505         if (!hdr) {
8506                 nlmsg_free(msg);
8507                 return;
8508         }
8509
8510         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8511             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8512             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
8513             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8514             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
8515                 goto nla_put_failure;
8516
8517         err = genlmsg_end(msg, hdr);
8518         if (err < 0) {
8519                 nlmsg_free(msg);
8520                 return;
8521         }
8522
8523         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8524                                 nl80211_mlme_mcgrp.id, gfp);
8525         return;
8526
8527  nla_put_failure:
8528         genlmsg_cancel(msg, hdr);
8529         nlmsg_free(msg);
8530 }
8531 EXPORT_SYMBOL(cfg80211_probe_status);
8532
8533 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
8534                                  const u8 *frame, size_t len,
8535                                  int freq, int sig_dbm, gfp_t gfp)
8536 {
8537         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
8538         struct sk_buff *msg;
8539         void *hdr;
8540         u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
8541
8542         if (!nlpid)
8543                 return;
8544
8545         msg = nlmsg_new(len + 100, gfp);
8546         if (!msg)
8547                 return;
8548
8549         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8550         if (!hdr) {
8551                 nlmsg_free(msg);
8552                 return;
8553         }
8554
8555         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8556             (freq &&
8557              nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
8558             (sig_dbm &&
8559              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8560             nla_put(msg, NL80211_ATTR_FRAME, len, frame))
8561                 goto nla_put_failure;
8562
8563         genlmsg_end(msg, hdr);
8564
8565         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
8566         return;
8567
8568  nla_put_failure:
8569         genlmsg_cancel(msg, hdr);
8570         nlmsg_free(msg);
8571 }
8572 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
8573
8574 static int nl80211_netlink_notify(struct notifier_block * nb,
8575                                   unsigned long state,
8576                                   void *_notify)
8577 {
8578         struct netlink_notify *notify = _notify;
8579         struct cfg80211_registered_device *rdev;
8580         struct wireless_dev *wdev;
8581
8582         if (state != NETLINK_URELEASE)
8583                 return NOTIFY_DONE;
8584
8585         rcu_read_lock();
8586
8587         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
8588                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
8589                         cfg80211_mlme_unregister_socket(wdev, notify->pid);
8590                 if (rdev->ap_beacons_nlpid == notify->pid)
8591                         rdev->ap_beacons_nlpid = 0;
8592         }
8593
8594         rcu_read_unlock();
8595
8596         return NOTIFY_DONE;
8597 }
8598
8599 static struct notifier_block nl80211_netlink_notifier = {
8600         .notifier_call = nl80211_netlink_notify,
8601 };
8602
8603 /* initialisation/exit functions */
8604
8605 int nl80211_init(void)
8606 {
8607         int err;
8608
8609         err = genl_register_family_with_ops(&nl80211_fam,
8610                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
8611         if (err)
8612                 return err;
8613
8614         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
8615         if (err)
8616                 goto err_out;
8617
8618         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
8619         if (err)
8620                 goto err_out;
8621
8622         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
8623         if (err)
8624                 goto err_out;
8625
8626         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
8627         if (err)
8628                 goto err_out;
8629
8630 #ifdef CONFIG_NL80211_TESTMODE
8631         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
8632         if (err)
8633                 goto err_out;
8634 #endif
8635
8636         err = netlink_register_notifier(&nl80211_netlink_notifier);
8637         if (err)
8638                 goto err_out;
8639
8640         return 0;
8641  err_out:
8642         genl_unregister_family(&nl80211_fam);
8643         return err;
8644 }
8645
8646 void nl80211_exit(void)
8647 {
8648         netlink_unregister_notifier(&nl80211_netlink_notifier);
8649         genl_unregister_family(&nl80211_fam);
8650 }