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 #include "rdev-ops.h"
  26
  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
 227         [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 228         [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
 229         [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
 230         [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
 231         [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },
 232
 233         [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
 234         [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
 235         [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
 236         [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
 237         [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
 238
 239         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 240         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 241         [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
 242
 243         [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
 244         [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
 245
 246         [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
 247         [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
 248                                     .len = WLAN_MAX_KEY_LEN },
 249         [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
 250         [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
 251         [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
 252         [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 253         [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
 254
 255         [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
 256         [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
 257         [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
 258                                        .len = IEEE80211_MAX_DATA_LEN },
 259         [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
 260                                        .len = IEEE80211_MAX_DATA_LEN },
 261         [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
 262         [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
 263         [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
 264         [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
 265                                                .len = NL80211_MAX_SUPP_RATES },
 266         [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
 267         [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
 268         [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
 269         [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
 270                                    .len = IEEE80211_MAX_MESH_ID_LEN },
 271         [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
 272
 273         [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
 274         [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
 275
 276         [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
 277         [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
 278         [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
 279         [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
 280                                            .len = NL80211_MAX_SUPP_RATES },
 281         [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
 282
 283         [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
 284         [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
 285
 286         [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
 287
 288         [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
 289         [NL80211_ATTR_IE] = { .type = NLA_BINARY,
 290                               .len = IEEE80211_MAX_DATA_LEN },
 291         [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
 292         [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
 293
 294         [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
 295                                 .len = IEEE80211_MAX_SSID_LEN },
 296         [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
 297         [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
 298         [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
 299         [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
 300         [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
 301         [NL80211_ATTR_STA_FLAGS2] = {
 302                 .len = sizeof(struct nl80211_sta_flag_update),
 303         },
 304         [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
 305         [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
 306         [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
 307         [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
 308         [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
 309         [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
 310         [NL80211_ATTR_PID] = { .type = NLA_U32 },
 311         [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 312         [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 313                                  .len = WLAN_PMKID_LEN },
 314         [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
 315         [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 316         [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
 317         [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
 318                                  .len = IEEE80211_MAX_DATA_LEN },
 319         [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
 320         [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
 321         [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
 322         [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
 323         [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
 324         [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
 325         [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
 326         [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
 327         [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
 328         [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
 329         [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
 330         [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
 331         [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 332         [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
 333         [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
 334         [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
 335         [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
 336         [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
 337         [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
 338         [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
 339                                          .len = IEEE80211_MAX_DATA_LEN },
 340         [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
 341                                          .len = IEEE80211_MAX_DATA_LEN },
 342         [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
 343         [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
 344         [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
 345         [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
 346         [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
 347         [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
 348         [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
 349         [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
 350         [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
 351         [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
 352                                       .len = IEEE80211_MAX_DATA_LEN },
 353         [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
 354         [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
 355         [NL80211_ATTR_HT_CAPABILITY_MASK] = {
 356                 .len = NL80211_HT_CAPABILITY_LEN
 357         },
 358         [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
 359         [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
 360         [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
 361         [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
 362         [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },
 363         [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, },
 364         [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN },
 365         [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
 366         [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 },
 367         [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 },
 368 };
 369
 370 /* policy for the key attributes */
 371 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
 372         [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
 373         [NL80211_KEY_IDX] = { .type = NLA_U8 },
 374         [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
 375         [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
 376         [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
 377         [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
 378         [NL80211_KEY_TYPE] = { .type = NLA_U32 },
 379         [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
 380 };
 381
 382 /* policy for the key default flags */
 383 static const struct nla_policy
 384 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
 385         [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
 386         [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
 387 };
 388
 389 /* policy for WoWLAN attributes */
 390 static const struct nla_policy
 391 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
 392         [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
 393         [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
 394         [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
 395         [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
 396         [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
 397         [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
 398         [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
 399         [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
 400 };
 401
 402 /* policy for GTK rekey offload attributes */
 403 static const struct nla_policy
 404 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
 405         [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
 406         [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
 407         [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
 408 };
 409
 410 static const struct nla_policy
 411 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
 412         [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
 413                                                  .len = IEEE80211_MAX_SSID_LEN },
 414         [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
 415 };
 416
 417 /* ifidx get helper */
 418 static int nl80211_get_ifidx(struct netlink_callback *cb)
 419 {
 420         int res;
 421
 422         res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
 423                           nl80211_fam.attrbuf, nl80211_fam.maxattr,
 424                           nl80211_policy);
 425         if (res)
 426                 return res;
 427
 428         if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
 429                 return -EINVAL;
 430
 431         res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
 432         if (!res)
 433                 return -EINVAL;
 434         return res;
 435 }
 436
 437 static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
 438                                        struct netlink_callback *cb,
 439                                        struct cfg80211_registered_device **rdev,
 440                                        struct net_device **dev)
 441 {
 442         int ifidx = cb->args[0];
 443         int err;
 444
 445         if (!ifidx)
 446                 ifidx = nl80211_get_ifidx(cb);
 447         if (ifidx < 0)
 448                 return ifidx;
 449
 450         cb->args[0] = ifidx;
 451
 452         rtnl_lock();
 453
 454         *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
 455         if (!*dev) {
 456                 err = -ENODEV;
 457                 goto out_rtnl;
 458         }
 459
 460         *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
 461         if (IS_ERR(*rdev)) {
 462                 err = PTR_ERR(*rdev);
 463                 goto out_rtnl;
 464         }
 465
 466         return 0;
 467  out_rtnl:
 468         rtnl_unlock();
 469         return err;
 470 }
 471
 472 static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
 473 {
 474         cfg80211_unlock_rdev(rdev);
 475         rtnl_unlock();
 476 }
 477
 478 /* IE validation */
 479 static bool is_valid_ie_attr(const struct nlattr *attr)
 480 {
 481         const u8 *pos;
 482         int len;
 483
 484         if (!attr)
 485                 return true;
 486
 487         pos = nla_data(attr);
 488         len = nla_len(attr);
 489
 490         while (len) {
 491                 u8 elemlen;
 492
 493                 if (len < 2)
 494                         return false;
 495                 len -= 2;
 496
 497                 elemlen = pos[1];
 498                 if (elemlen > len)
 499                         return false;
 500
 501                 len -= elemlen;
 502                 pos += 2 + elemlen;
 503         }
 504
 505         return true;
 506 }
 507
 508 /* message building helper */
 509 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
 510                                    int flags, u8 cmd)
 511 {
 512         /* since there is no private header just add the generic one */
 513         return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
 514 }
 515
 516 static int nl80211_msg_put_channel(struct sk_buff *msg,
 517                                    struct ieee80211_channel *chan)
 518 {
 519         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
 520                         chan->center_freq))
 521                 goto nla_put_failure;
 522
 523         if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
 524             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
 525                 goto nla_put_failure;
 526         if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
 527             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
 528                 goto nla_put_failure;
 529         if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 530             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 531                 goto nla_put_failure;
 532         if ((chan->flags & IEEE80211_CHAN_RADAR) &&
 533             nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 534                 goto nla_put_failure;
 535
 536         if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
 537                         DBM_TO_MBM(chan->max_power)))
 538                 goto nla_put_failure;
 539
 540         return 0;
 541
 542  nla_put_failure:
 543         return -ENOBUFS;
 544 }
 545
 546 /* netlink command implementations */
 547
 548 struct key_parse {
 549         struct key_params p;
 550         int idx;
 551         int type;
 552         bool def, defmgmt;
 553         bool def_uni, def_multi;
 554 };
 555
 556 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
 557 {
 558         struct nlattr *tb[NL80211_KEY_MAX + 1];
 559         int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
 560                                    nl80211_key_policy);
 561         if (err)
 562                 return err;
 563
 564         k->def = !!tb[NL80211_KEY_DEFAULT];
 565         k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
 566
 567         if (k->def) {
 568                 k->def_uni = true;
 569                 k->def_multi = true;
 570         }
 571         if (k->defmgmt)
 572                 k->def_multi = true;
 573
 574         if (tb[NL80211_KEY_IDX])
 575                 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
 576
 577         if (tb[NL80211_KEY_DATA]) {
 578                 k->p.key = nla_data(tb[NL80211_KEY_DATA]);
 579                 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
 580         }
 581
 582         if (tb[NL80211_KEY_SEQ]) {
 583                 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
 584                 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
 585         }
 586
 587         if (tb[NL80211_KEY_CIPHER])
 588                 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
 589
 590         if (tb[NL80211_KEY_TYPE]) {
 591                 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
 592                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 593                         return -EINVAL;
 594         }
 595
 596         if (tb[NL80211_KEY_DEFAULT_TYPES]) {
 597                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 598                 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 599                                        tb[NL80211_KEY_DEFAULT_TYPES],
 600                                        nl80211_key_default_policy);
 601                 if (err)
 602                         return err;
 603
 604                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 605                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 606         }
 607
 608         return 0;
 609 }
 610
 611 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
 612 {
 613         if (info->attrs[NL80211_ATTR_KEY_DATA]) {
 614                 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
 615                 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
 616         }
 617
 618         if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
 619                 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
 620                 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
 621         }
 622
 623         if (info->attrs[NL80211_ATTR_KEY_IDX])
 624                 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
 625
 626         if (info->attrs[NL80211_ATTR_KEY_CIPHER])
 627                 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
 628
 629         k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
 630         k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
 631
 632         if (k->def) {
 633                 k->def_uni = true;
 634                 k->def_multi = true;
 635         }
 636         if (k->defmgmt)
 637                 k->def_multi = true;
 638
 639         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
 640                 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
 641                 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
 642                         return -EINVAL;
 643         }
 644
 645         if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
 646                 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
 647                 int err = nla_parse_nested(
 648                                 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
 649                                 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
 650                                 nl80211_key_default_policy);
 651                 if (err)
 652                         return err;
 653
 654                 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
 655                 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
 656         }
 657
 658         return 0;
 659 }
 660
 661 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
 662 {
 663         int err;
 664
 665         memset(k, 0, sizeof(*k));
 666         k->idx = -1;
 667         k->type = -1;
 668
 669         if (info->attrs[NL80211_ATTR_KEY])
 670                 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
 671         else
 672                 err = nl80211_parse_key_old(info, k);
 673
 674         if (err)
 675                 return err;
 676
 677         if (k->def && k->defmgmt)
 678                 return -EINVAL;
 679
 680         if (k->defmgmt) {
 681                 if (k->def_uni || !k->def_multi)
 682                         return -EINVAL;
 683         }
 684
 685         if (k->idx != -1) {
 686                 if (k->defmgmt) {
 687                         if (k->idx < 4 || k->idx > 5)
 688                                 return -EINVAL;
 689                 } else if (k->def) {
 690                         if (k->idx < 0 || k->idx > 3)
 691                                 return -EINVAL;
 692                 } else {
 693                         if (k->idx < 0 || k->idx > 5)
 694                                 return -EINVAL;
 695                 }
 696         }
 697
 698         return 0;
 699 }
 700
 701 static struct cfg80211_cached_keys *
 702 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
 703                        struct nlattr *keys, bool *no_ht)
 704 {
 705         struct key_parse parse;
 706         struct nlattr *key;
 707         struct cfg80211_cached_keys *result;
 708         int rem, err, def = 0;
 709
 710         result = kzalloc(sizeof(*result), GFP_KERNEL);
 711         if (!result)
 712                 return ERR_PTR(-ENOMEM);
 713
 714         result->def = -1;
 715         result->defmgmt = -1;
 716
 717         nla_for_each_nested(key, keys, rem) {
 718                 memset(&parse, 0, sizeof(parse));
 719                 parse.idx = -1;
 720
 721                 err = nl80211_parse_key_new(key, &parse);
 722                 if (err)
 723                         goto error;
 724                 err = -EINVAL;
 725                 if (!parse.p.key)
 726                         goto error;
 727                 if (parse.idx < 0 || parse.idx > 4)
 728                         goto error;
 729                 if (parse.def) {
 730                         if (def)
 731                                 goto error;
 732                         def = 1;
 733                         result->def = parse.idx;
 734                         if (!parse.def_uni || !parse.def_multi)
 735                                 goto error;
 736                 } else if (parse.defmgmt)
 737                         goto error;
 738                 err = cfg80211_validate_key_settings(rdev, &parse.p,
 739                                                      parse.idx, false, NULL);
 740                 if (err)
 741                         goto error;
 742                 result->params[parse.idx].cipher = parse.p.cipher;
 743                 result->params[parse.idx].key_len = parse.p.key_len;
 744                 result->params[parse.idx].key = result->data[parse.idx];
 745                 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
 746
 747                 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 ||
 748                     parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) {
 749                         if (no_ht)
 750                                 *no_ht = true;
 751                 }
 752         }
 753
 754         return result;
 755  error:
 756         kfree(result);
 757         return ERR_PTR(err);
 758 }
 759
 760 static int nl80211_key_allowed(struct wireless_dev *wdev)
 761 {
 762         ASSERT_WDEV_LOCK(wdev);
 763
 764         switch (wdev->iftype) {
 765         case NL80211_IFTYPE_AP:
 766         case NL80211_IFTYPE_AP_VLAN:
 767         case NL80211_IFTYPE_P2P_GO:
 768         case NL80211_IFTYPE_MESH_POINT:
 769                 break;
 770         case NL80211_IFTYPE_ADHOC:
 771                 if (!wdev->current_bss)
 772                         return -ENOLINK;
 773                 break;
 774         case NL80211_IFTYPE_STATION:
 775         case NL80211_IFTYPE_P2P_CLIENT:
 776                 if (wdev->sme_state != CFG80211_SME_CONNECTED)
 777                         return -ENOLINK;
 778                 break;
 779         default:
 780                 return -EINVAL;
 781         }
 782
 783         return 0;
 784 }
 785
 786 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
 787 {
 788         struct nlattr *nl_modes = nla_nest_start(msg, attr);
 789         int i;
 790
 791         if (!nl_modes)
 792                 goto nla_put_failure;
 793
 794         i = 0;
 795         while (ifmodes) {
 796                 if ((ifmodes & 1) && nla_put_flag(msg, i))
 797                         goto nla_put_failure;
 798                 ifmodes >>= 1;
 799                 i++;
 800         }
 801
 802         nla_nest_end(msg, nl_modes);
 803         return 0;
 804
 805 nla_put_failure:
 806         return -ENOBUFS;
 807 }
 808
 809 static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 810                                           struct sk_buff *msg)
 811 {
 812         struct nlattr *nl_combis;
 813         int i, j;
 814
 815         nl_combis = nla_nest_start(msg,
 816                                 NL80211_ATTR_INTERFACE_COMBINATIONS);
 817         if (!nl_combis)
 818                 goto nla_put_failure;
 819
 820         for (i = 0; i < wiphy->n_iface_combinations; i++) {
 821                 const struct ieee80211_iface_combination *c;
 822                 struct nlattr *nl_combi, *nl_limits;
 823
 824                 c = &wiphy->iface_combinations[i];
 825
 826                 nl_combi = nla_nest_start(msg, i + 1);
 827                 if (!nl_combi)
 828                         goto nla_put_failure;
 829
 830                 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
 831                 if (!nl_limits)
 832                         goto nla_put_failure;
 833
 834                 for (j = 0; j < c->n_limits; j++) {
 835                         struct nlattr *nl_limit;
 836
 837                         nl_limit = nla_nest_start(msg, j + 1);
 838                         if (!nl_limit)
 839                                 goto nla_put_failure;
 840                         if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
 841                                         c->limits[j].max))
 842                                 goto nla_put_failure;
 843                         if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
 844                                                 c->limits[j].types))
 845                                 goto nla_put_failure;
 846                         nla_nest_end(msg, nl_limit);
 847                 }
 848
 849                 nla_nest_end(msg, nl_limits);
 850
 851                 if (c->beacon_int_infra_match &&
 852                     nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
 853                         goto nla_put_failure;
 854                 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
 855                                 c->num_different_channels) ||
 856                     nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 857                                 c->max_interfaces))
 858                         goto nla_put_failure;
 859
 860                 nla_nest_end(msg, nl_combi);
 861         }
 862
 863         nla_nest_end(msg, nl_combis);
 864
 865         return 0;
 866 nla_put_failure:
 867         return -ENOBUFS;
 868 }
 869
 870 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 871                               struct cfg80211_registered_device *dev)
 872 {
 873         void *hdr;
 874         struct nlattr *nl_bands, *nl_band;
 875         struct nlattr *nl_freqs, *nl_freq;
 876         struct nlattr *nl_rates, *nl_rate;
 877         struct nlattr *nl_cmds;
 878         enum ieee80211_band band;
 879         struct ieee80211_channel *chan;
 880         struct ieee80211_rate *rate;
 881         int i;
 882         const struct ieee80211_txrx_stypes *mgmt_stypes =
 883                                 dev->wiphy.mgmt_stypes;
 884
 885         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_WIPHY);
 886         if (!hdr)
 887                 return -1;
 888
 889         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
 890             nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
 891             nla_put_u32(msg, NL80211_ATTR_GENERATION,
 892                         cfg80211_rdev_list_generation) ||
 893             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
 894                        dev->wiphy.retry_short) ||
 895             nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
 896                        dev->wiphy.retry_long) ||
 897             nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
 898                         dev->wiphy.frag_threshold) ||
 899             nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
 900                         dev->wiphy.rts_threshold) ||
 901             nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
 902                        dev->wiphy.coverage_class) ||
 903             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
 904                        dev->wiphy.max_scan_ssids) ||
 905             nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
 906                        dev->wiphy.max_sched_scan_ssids) ||
 907             nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
 908                         dev->wiphy.max_scan_ie_len) ||
 909             nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
 910                         dev->wiphy.max_sched_scan_ie_len) ||
 911             nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
 912                        dev->wiphy.max_match_sets))
 913                 goto nla_put_failure;
 914
 915         if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
 916             nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
 917                 goto nla_put_failure;
 918         if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
 919             nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
 920                 goto nla_put_failure;
 921         if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
 922             nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
 923                 goto nla_put_failure;
 924         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
 925             nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
 926                 goto nla_put_failure;
 927         if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
 928             nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
 929                 goto nla_put_failure;
 930         if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
 931             nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
 932                 goto nla_put_failure;
 933
 934         if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 935                     sizeof(u32) * dev->wiphy.n_cipher_suites,
 936                     dev->wiphy.cipher_suites))
 937                 goto nla_put_failure;
 938
 939         if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
 940                        dev->wiphy.max_num_pmkids))
 941                 goto nla_put_failure;
 942
 943         if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
 944             nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
 945                 goto nla_put_failure;
 946
 947         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
 948                         dev->wiphy.available_antennas_tx) ||
 949             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
 950                         dev->wiphy.available_antennas_rx))
 951                 goto nla_put_failure;
 952
 953         if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
 954             nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
 955                         dev->wiphy.probe_resp_offload))
 956                 goto nla_put_failure;
 957
 958         if ((dev->wiphy.available_antennas_tx ||
 959              dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
 960                 u32 tx_ant = 0, rx_ant = 0;
 961                 int res;
 962                 res = rdev_get_antenna(dev, &tx_ant, &rx_ant);
 963                 if (!res) {
 964                         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
 965                                         tx_ant) ||
 966                             nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
 967                                         rx_ant))
 968                                 goto nla_put_failure;
 969                 }
 970         }
 971
 972         if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 973                                 dev->wiphy.interface_modes))
 974                 goto nla_put_failure;
 975
 976         nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
 977         if (!nl_bands)
 978                 goto nla_put_failure;
 979
 980         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
 981                 if (!dev->wiphy.bands[band])
 982                         continue;
 983
 984                 nl_band = nla_nest_start(msg, band);
 985                 if (!nl_band)
 986                         goto nla_put_failure;
 987
 988                 /* add HT info */
 989                 if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
 990                     (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
 991                              sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
 992                              &dev->wiphy.bands[band]->ht_cap.mcs) ||
 993                      nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
 994                                  dev->wiphy.bands[band]->ht_cap.cap) ||
 995                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
 996                                 dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
 997                      nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
 998                                 dev->wiphy.bands[band]->ht_cap.ampdu_density)))
 999                         goto nla_put_failure;
1000
1001                 /* add VHT info */
1002                 if (dev->wiphy.bands[band]->vht_cap.vht_supported &&
1003                     (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
1004                              sizeof(dev->wiphy.bands[band]->vht_cap.vht_mcs),
1005                              &dev->wiphy.bands[band]->vht_cap.vht_mcs) ||
1006                      nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
1007                                  dev->wiphy.bands[band]->vht_cap.cap)))
1008                         goto nla_put_failure;
1009
1010                 /* add frequencies */
1011                 nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
1012                 if (!nl_freqs)
1013                         goto nla_put_failure;
1014
1015                 for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
1016                         nl_freq = nla_nest_start(msg, i);
1017                         if (!nl_freq)
1018                                 goto nla_put_failure;
1019
1020                         chan = &dev->wiphy.bands[band]->channels[i];
1021
1022                         if (nl80211_msg_put_channel(msg, chan))
1023                                 goto nla_put_failure;
1024
1025                         nla_nest_end(msg, nl_freq);
1026                 }
1027
1028                 nla_nest_end(msg, nl_freqs);
1029
1030                 /* add bitrates */
1031                 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
1032                 if (!nl_rates)
1033                         goto nla_put_failure;
1034
1035                 for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
1036                         nl_rate = nla_nest_start(msg, i);
1037                         if (!nl_rate)
1038                                 goto nla_put_failure;
1039
1040                         rate = &dev->wiphy.bands[band]->bitrates[i];
1041                         if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
1042                                         rate->bitrate))
1043                                 goto nla_put_failure;
1044                         if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
1045                             nla_put_flag(msg,
1046                                          NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
1047                                 goto nla_put_failure;
1048
1049                         nla_nest_end(msg, nl_rate);
1050                 }
1051
1052                 nla_nest_end(msg, nl_rates);
1053
1054                 nla_nest_end(msg, nl_band);
1055         }
1056         nla_nest_end(msg, nl_bands);
1057
1058         nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
1059         if (!nl_cmds)
1060                 goto nla_put_failure;
1061
1062         i = 0;
1063 #define CMD(op, n)                                              \
1064          do {                                                   \
1065                 if (dev->ops->op) {                             \
1066                         i++;                                    \
1067                         if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
1068                                 goto nla_put_failure;           \
1069                 }                                               \
1070         } while (0)
1071
1072         CMD(add_virtual_intf, NEW_INTERFACE);
1073         CMD(change_virtual_intf, SET_INTERFACE);
1074         CMD(add_key, NEW_KEY);
1075         CMD(start_ap, START_AP);
1076         CMD(add_station, NEW_STATION);
1077         CMD(add_mpath, NEW_MPATH);
1078         CMD(update_mesh_config, SET_MESH_CONFIG);
1079         CMD(change_bss, SET_BSS);
1080         CMD(auth, AUTHENTICATE);
1081         CMD(assoc, ASSOCIATE);
1082         CMD(deauth, DEAUTHENTICATE);
1083         CMD(disassoc, DISASSOCIATE);
1084         CMD(join_ibss, JOIN_IBSS);
1085         CMD(join_mesh, JOIN_MESH);
1086         CMD(set_pmksa, SET_PMKSA);
1087         CMD(del_pmksa, DEL_PMKSA);
1088         CMD(flush_pmksa, FLUSH_PMKSA);
1089         if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
1090                 CMD(remain_on_channel, REMAIN_ON_CHANNEL);
1091         CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
1092         CMD(mgmt_tx, FRAME);
1093         CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
1094         if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
1095                 i++;
1096                 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
1097                         goto nla_put_failure;
1098         }
1099         if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
1100             dev->ops->join_mesh) {
1101                 i++;
1102                 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
1103                         goto nla_put_failure;
1104         }
1105         CMD(set_wds_peer, SET_WDS_PEER);
1106         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
1107                 CMD(tdls_mgmt, TDLS_MGMT);
1108                 CMD(tdls_oper, TDLS_OPER);
1109         }
1110         if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
1111                 CMD(sched_scan_start, START_SCHED_SCAN);
1112         CMD(probe_client, PROBE_CLIENT);
1113         CMD(set_noack_map, SET_NOACK_MAP);
1114         if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
1115                 i++;
1116                 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
1117                         goto nla_put_failure;
1118         }
1119         CMD(start_p2p_device, START_P2P_DEVICE);
1120         CMD(set_mcast_rate, SET_MCAST_RATE);
1121
1122 #ifdef CONFIG_NL80211_TESTMODE
1123         CMD(testmode_cmd, TESTMODE);
1124 #endif
1125
1126 #undef CMD
1127
1128         if (dev->ops->connect || dev->ops->auth) {
1129                 i++;
1130                 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
1131                         goto nla_put_failure;
1132         }
1133
1134         if (dev->ops->disconnect || dev->ops->deauth) {
1135                 i++;
1136                 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
1137                         goto nla_put_failure;
1138         }
1139
1140         nla_nest_end(msg, nl_cmds);
1141
1142         if (dev->ops->remain_on_channel &&
1143             (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
1144             nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
1145                         dev->wiphy.max_remain_on_channel_duration))
1146                 goto nla_put_failure;
1147
1148         if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
1149             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
1150                 goto nla_put_failure;
1151
1152         if (mgmt_stypes) {
1153                 u16 stypes;
1154                 struct nlattr *nl_ftypes, *nl_ifs;
1155                 enum nl80211_iftype ift;
1156
1157                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
1158                 if (!nl_ifs)
1159                         goto nla_put_failure;
1160
1161                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1162                         nl_ftypes = nla_nest_start(msg, ift);
1163                         if (!nl_ftypes)
1164                                 goto nla_put_failure;
1165                         i = 0;
1166                         stypes = mgmt_stypes[ift].tx;
1167                         while (stypes) {
1168                                 if ((stypes & 1) &&
1169                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1170                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1171                                         goto nla_put_failure;
1172                                 stypes >>= 1;
1173                                 i++;
1174                         }
1175                         nla_nest_end(msg, nl_ftypes);
1176                 }
1177
1178                 nla_nest_end(msg, nl_ifs);
1179
1180                 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
1181                 if (!nl_ifs)
1182                         goto nla_put_failure;
1183
1184                 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
1185                         nl_ftypes = nla_nest_start(msg, ift);
1186                         if (!nl_ftypes)
1187                                 goto nla_put_failure;
1188                         i = 0;
1189                         stypes = mgmt_stypes[ift].rx;
1190                         while (stypes) {
1191                                 if ((stypes & 1) &&
1192                                     nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
1193                                                 (i << 4) | IEEE80211_FTYPE_MGMT))
1194                                         goto nla_put_failure;
1195                                 stypes >>= 1;
1196                                 i++;
1197                         }
1198                         nla_nest_end(msg, nl_ftypes);
1199                 }
1200                 nla_nest_end(msg, nl_ifs);
1201         }
1202
1203 #ifdef CONFIG_PM
1204         if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
1205                 struct nlattr *nl_wowlan;
1206
1207                 nl_wowlan = nla_nest_start(msg,
1208                                 NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
1209                 if (!nl_wowlan)
1210                         goto nla_put_failure;
1211
1212                 if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
1213                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
1214                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
1215                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
1216                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
1217                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
1218                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
1219                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
1220                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
1221                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
1222                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
1223                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
1224                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
1225                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
1226                     ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
1227                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
1228                     goto nla_put_failure;
1229                 if (dev->wiphy.wowlan.n_patterns) {
1230                         struct nl80211_wowlan_pattern_support pat = {
1231                                 .max_patterns = dev->wiphy.wowlan.n_patterns,
1232                                 .min_pattern_len =
1233                                         dev->wiphy.wowlan.pattern_min_len,
1234                                 .max_pattern_len =
1235                                         dev->wiphy.wowlan.pattern_max_len,
1236                         };
1237                         if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
1238                                     sizeof(pat), &pat))
1239                                 goto nla_put_failure;
1240                 }
1241
1242                 nla_nest_end(msg, nl_wowlan);
1243         }
1244 #endif
1245
1246         if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
1247                                 dev->wiphy.software_iftypes))
1248                 goto nla_put_failure;
1249
1250         if (nl80211_put_iface_combinations(&dev->wiphy, msg))
1251                 goto nla_put_failure;
1252
1253         if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
1254             nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
1255                         dev->wiphy.ap_sme_capa))
1256                 goto nla_put_failure;
1257
1258         if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
1259                         dev->wiphy.features))
1260                 goto nla_put_failure;
1261
1262         if (dev->wiphy.ht_capa_mod_mask &&
1263             nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
1264                     sizeof(*dev->wiphy.ht_capa_mod_mask),
1265                     dev->wiphy.ht_capa_mod_mask))
1266                 goto nla_put_failure;
1267
1268         return genlmsg_end(msg, hdr);
1269
1270  nla_put_failure:
1271         genlmsg_cancel(msg, hdr);
1272         return -EMSGSIZE;
1273 }
1274
1275 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
1276 {
1277         int idx = 0;
1278         int start = cb->args[0];
1279         struct cfg80211_registered_device *dev;
1280
1281         mutex_lock(&cfg80211_mutex);
1282         list_for_each_entry(dev, &cfg80211_rdev_list, list) {
1283                 if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
1284                         continue;
1285                 if (++idx <= start)
1286                         continue;
1287                 if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
1288                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
1289                                        dev) < 0) {
1290                         idx--;
1291                         break;
1292                 }
1293         }
1294         mutex_unlock(&cfg80211_mutex);
1295
1296         cb->args[0] = idx;
1297
1298         return skb->len;
1299 }
1300
1301 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
1302 {
1303         struct sk_buff *msg;
1304         struct cfg80211_registered_device *dev = info->user_ptr[0];
1305
1306         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1307         if (!msg)
1308                 return -ENOMEM;
1309
1310         if (nl80211_send_wiphy(msg, info->snd_portid, info->snd_seq, 0, dev) < 0) {
1311                 nlmsg_free(msg);
1312                 return -ENOBUFS;
1313         }
1314
1315         return genlmsg_reply(msg, info);
1316 }
1317
1318 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
1319         [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
1320         [NL80211_TXQ_ATTR_TXOP]                 = { .type = NLA_U16 },
1321         [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
1322         [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
1323         [NL80211_TXQ_ATTR_AIFS]                 = { .type = NLA_U8 },
1324 };
1325
1326 static int parse_txq_params(struct nlattr *tb[],
1327                             struct ieee80211_txq_params *txq_params)
1328 {
1329         if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
1330             !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
1331             !tb[NL80211_TXQ_ATTR_AIFS])
1332                 return -EINVAL;
1333
1334         txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
1335         txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
1336         txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
1337         txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
1338         txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
1339
1340         if (txq_params->ac >= NL80211_NUM_ACS)
1341                 return -EINVAL;
1342
1343         return 0;
1344 }
1345
1346 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
1347 {
1348         /*
1349          * You can only set the channel explicitly for WDS interfaces,
1350          * all others have their channel managed via their respective
1351          * "establish a connection" command (connect, join, ...)
1352          *
1353          * For AP/GO and mesh mode, the channel can be set with the
1354          * channel userspace API, but is only stored and passed to the
1355          * low-level driver when the AP starts or the mesh is joined.
1356          * This is for backward compatibility, userspace can also give
1357          * the channel in the start-ap or join-mesh commands instead.
1358          *
1359          * Monitors are special as they are normally slaved to
1360          * whatever else is going on, so they have their own special
1361          * operation to set the monitor channel if possible.
1362          */
1363         return !wdev ||
1364                 wdev->iftype == NL80211_IFTYPE_AP ||
1365                 wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
1366                 wdev->iftype == NL80211_IFTYPE_MONITOR ||
1367                 wdev->iftype == NL80211_IFTYPE_P2P_GO;
1368 }
1369
1370 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
1371                                  struct genl_info *info,
1372                                  struct cfg80211_chan_def *chandef)
1373 {
1374         struct ieee80211_sta_ht_cap *ht_cap;
1375         struct ieee80211_sta_vht_cap *vht_cap;
1376         u32 control_freq, width;
1377
1378         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
1379                 return -EINVAL;
1380
1381         control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
1382
1383         chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq);
1384         chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
1385         chandef->center_freq1 = control_freq;
1386         chandef->center_freq2 = 0;
1387
1388         /* Primary channel not allowed */
1389         if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED)
1390                 return -EINVAL;
1391
1392         if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
1393                 enum nl80211_channel_type chantype;
1394
1395                 chantype = nla_get_u32(
1396                                 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
1397
1398                 switch (chantype) {
1399                 case NL80211_CHAN_NO_HT:
1400                 case NL80211_CHAN_HT20:
1401                 case NL80211_CHAN_HT40PLUS:
1402                 case NL80211_CHAN_HT40MINUS:
1403                         cfg80211_chandef_create(chandef, chandef->chan,
1404                                                 chantype);
1405                         break;
1406                 default:
1407                         return -EINVAL;
1408                 }
1409         } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
1410                 chandef->width =
1411                         nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]);
1412                 if (info->attrs[NL80211_ATTR_CENTER_FREQ1])
1413                         chandef->center_freq1 =
1414                                 nla_get_u32(
1415                                         info->attrs[NL80211_ATTR_CENTER_FREQ1]);
1416                 if (info->attrs[NL80211_ATTR_CENTER_FREQ2])
1417                         chandef->center_freq2 =
1418                                 nla_get_u32(
1419                                         info->attrs[NL80211_ATTR_CENTER_FREQ2]);
1420         }
1421
1422         ht_cap = &rdev->wiphy.bands[chandef->chan->band]->ht_cap;
1423         vht_cap = &rdev->wiphy.bands[chandef->chan->band]->vht_cap;
1424
1425         if (!cfg80211_chandef_valid(chandef))
1426                 return -EINVAL;
1427
1428         switch (chandef->width) {
1429         case NL80211_CHAN_WIDTH_20:
1430         case NL80211_CHAN_WIDTH_20_NOHT:
1431                 width = 20;
1432                 break;
1433         case NL80211_CHAN_WIDTH_40:
1434                 width = 40;
1435                 break;
1436         case NL80211_CHAN_WIDTH_80:
1437                 width = 80;
1438                 break;
1439         case NL80211_CHAN_WIDTH_80P80:
1440                 width = 80;
1441                 break;
1442         case NL80211_CHAN_WIDTH_160:
1443                 width = 160;
1444                 break;
1445         default:
1446                 return -EINVAL;
1447         }
1448
1449         if (!cfg80211_chandef_usable(&rdev->wiphy, chandef,
1450                                      IEEE80211_CHAN_DISABLED))
1451                 return -EINVAL;
1452
1453         return 0;
1454 }
1455
1456 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
1457                                  struct wireless_dev *wdev,
1458                                  struct genl_info *info)
1459 {
1460         struct cfg80211_chan_def chandef;
1461         int result;
1462         enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
1463
1464         if (wdev)
1465                 iftype = wdev->iftype;
1466
1467         if (!nl80211_can_set_dev_channel(wdev))
1468                 return -EOPNOTSUPP;
1469
1470         result = nl80211_parse_chandef(rdev, info, &chandef);
1471         if (result)
1472                 return result;
1473
1474         mutex_lock(&rdev->devlist_mtx);
1475         switch (iftype) {
1476         case NL80211_IFTYPE_AP:
1477         case NL80211_IFTYPE_P2P_GO:
1478                 if (wdev->beacon_interval) {
1479                         result = -EBUSY;
1480                         break;
1481                 }
1482                 if (!cfg80211_reg_can_beacon(&rdev->wiphy, &chandef)) {
1483                         result = -EINVAL;
1484                         break;
1485                 }
1486                 wdev->preset_chandef = chandef;
1487                 result = 0;
1488                 break;
1489         case NL80211_IFTYPE_MESH_POINT:
1490                 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef);
1491                 break;
1492         case NL80211_IFTYPE_MONITOR:
1493                 result = cfg80211_set_monitor_channel(rdev, &chandef);
1494                 break;
1495         default:
1496                 result = -EINVAL;
1497         }
1498         mutex_unlock(&rdev->devlist_mtx);
1499
1500         return result;
1501 }
1502
1503 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
1504 {
1505         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1506         struct net_device *netdev = info->user_ptr[1];
1507
1508         return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
1509 }
1510
1511 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
1512 {
1513         struct cfg80211_registered_device *rdev = info->user_ptr[0];
1514         struct net_device *dev = info->user_ptr[1];
1515         struct wireless_dev *wdev = dev->ieee80211_ptr;
1516         const u8 *bssid;
1517
1518         if (!info->attrs[NL80211_ATTR_MAC])
1519                 return -EINVAL;
1520
1521         if (netif_running(dev))
1522                 return -EBUSY;
1523
1524         if (!rdev->ops->set_wds_peer)
1525                 return -EOPNOTSUPP;
1526
1527         if (wdev->iftype != NL80211_IFTYPE_WDS)
1528                 return -EOPNOTSUPP;
1529
1530         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
1531         return rdev_set_wds_peer(rdev, dev, bssid);
1532 }
1533
1534
1535 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
1536 {
1537         struct cfg80211_registered_device *rdev;
1538         struct net_device *netdev = NULL;
1539         struct wireless_dev *wdev;
1540         int result = 0, rem_txq_params = 0;
1541         struct nlattr *nl_txq_params;
1542         u32 changed;
1543         u8 retry_short = 0, retry_long = 0;
1544         u32 frag_threshold = 0, rts_threshold = 0;
1545         u8 coverage_class = 0;
1546
1547         /*
1548          * Try to find the wiphy and netdev. Normally this
1549          * function shouldn't need the netdev, but this is
1550          * done for backward compatibility -- previously
1551          * setting the channel was done per wiphy, but now
1552          * it is per netdev. Previous userland like hostapd
1553          * also passed a netdev to set_wiphy, so that it is
1554          * possible to let that go to the right netdev!
1555          */
1556         mutex_lock(&cfg80211_mutex);
1557
1558         if (info->attrs[NL80211_ATTR_IFINDEX]) {
1559                 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
1560
1561                 netdev = dev_get_by_index(genl_info_net(info), ifindex);
1562                 if (netdev && netdev->ieee80211_ptr) {
1563                         rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
1564                         mutex_lock(&rdev->mtx);
1565                 } else
1566                         netdev = NULL;
1567         }
1568
1569         if (!netdev) {
1570                 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
1571                                                   info->attrs);
1572                 if (IS_ERR(rdev)) {
1573                         mutex_unlock(&cfg80211_mutex);
1574                         return PTR_ERR(rdev);
1575                 }
1576                 wdev = NULL;
1577                 netdev = NULL;
1578                 result = 0;
1579
1580                 mutex_lock(&rdev->mtx);
1581         } else
1582                 wdev = netdev->ieee80211_ptr;
1583
1584         /*
1585          * end workaround code, by now the rdev is available
1586          * and locked, and wdev may or may not be NULL.
1587          */
1588
1589         if (info->attrs[NL80211_ATTR_WIPHY_NAME])
1590                 result = cfg80211_dev_rename(
1591                         rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
1592
1593         mutex_unlock(&cfg80211_mutex);
1594
1595         if (result)
1596                 goto bad_res;
1597
1598         if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
1599                 struct ieee80211_txq_params txq_params;
1600                 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
1601
1602                 if (!rdev->ops->set_txq_params) {
1603                         result = -EOPNOTSUPP;
1604                         goto bad_res;
1605                 }
1606
1607                 if (!netdev) {
1608                         result = -EINVAL;
1609                         goto bad_res;
1610                 }
1611
1612                 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
1613                     netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
1614                         result = -EINVAL;
1615                         goto bad_res;
1616                 }
1617
1618                 if (!netif_running(netdev)) {
1619                         result = -ENETDOWN;
1620                         goto bad_res;
1621                 }
1622
1623                 nla_for_each_nested(nl_txq_params,
1624                                     info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
1625                                     rem_txq_params) {
1626                         nla_parse(tb, NL80211_TXQ_ATTR_MAX,
1627                                   nla_data(nl_txq_params),
1628                                   nla_len(nl_txq_params),
1629                                   txq_params_policy);
1630                         result = parse_txq_params(tb, &txq_params);
1631                         if (result)
1632                                 goto bad_res;
1633
1634                         result = rdev_set_txq_params(rdev, netdev,
1635                                                      &txq_params);
1636                         if (result)
1637                                 goto bad_res;
1638                 }
1639         }
1640
1641         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
1642                 result = __nl80211_set_channel(rdev,
1643                                 nl80211_can_set_dev_channel(wdev) ? wdev : NULL,
1644                                 info);
1645                 if (result)
1646                         goto bad_res;
1647         }
1648
1649         if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
1650                 struct wireless_dev *txp_wdev = wdev;
1651                 enum nl80211_tx_power_setting type;
1652                 int idx, mbm = 0;
1653
1654                 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
1655                         txp_wdev = NULL;
1656
1657                 if (!rdev->ops->set_tx_power) {
1658                         result = -EOPNOTSUPP;
1659                         goto bad_res;
1660                 }
1661
1662                 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
1663                 type = nla_get_u32(info->attrs[idx]);
1664
1665                 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
1666                     (type != NL80211_TX_POWER_AUTOMATIC)) {
1667                         result = -EINVAL;
1668                         goto bad_res;
1669                 }
1670
1671                 if (type != NL80211_TX_POWER_AUTOMATIC) {
1672                         idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
1673                         mbm = nla_get_u32(info->attrs[idx]);
1674                 }
1675
1676                 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
1677                 if (result)
1678                         goto bad_res;
1679         }
1680
1681         if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
1682             info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
1683                 u32 tx_ant, rx_ant;
1684                 if ((!rdev->wiphy.available_antennas_tx &&
1685                      !rdev->wiphy.available_antennas_rx) ||
1686                     !rdev->ops->set_antenna) {
1687                         result = -EOPNOTSUPP;
1688                         goto bad_res;
1689                 }
1690
1691                 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
1692                 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
1693
1694                 /* reject antenna configurations which don't match the
1695                  * available antenna masks, except for the "all" mask */
1696                 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
1697                     (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
1698                         result = -EINVAL;
1699                         goto bad_res;
1700                 }
1701
1702                 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
1703                 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
1704
1705                 result = rdev_set_antenna(rdev, tx_ant, rx_ant);
1706                 if (result)
1707                         goto bad_res;
1708         }
1709
1710         changed = 0;
1711
1712         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
1713                 retry_short = nla_get_u8(
1714                         info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
1715                 if (retry_short == 0) {
1716                         result = -EINVAL;
1717                         goto bad_res;
1718                 }
1719                 changed |= WIPHY_PARAM_RETRY_SHORT;
1720         }
1721
1722         if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
1723                 retry_long = nla_get_u8(
1724                         info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
1725                 if (retry_long == 0) {
1726                         result = -EINVAL;
1727                         goto bad_res;
1728                 }
1729                 changed |= WIPHY_PARAM_RETRY_LONG;
1730         }
1731
1732         if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
1733                 frag_threshold = nla_get_u32(
1734                         info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
1735                 if (frag_threshold < 256) {
1736                         result = -EINVAL;
1737                         goto bad_res;
1738                 }
1739                 if (frag_threshold != (u32) -1) {
1740                         /*
1741                          * Fragments (apart from the last one) are required to
1742                          * have even length. Make the fragmentation code
1743                          * simpler by stripping LSB should someone try to use
1744                          * odd threshold value.
1745                          */
1746                         frag_threshold &= ~0x1;
1747                 }
1748                 changed |= WIPHY_PARAM_FRAG_THRESHOLD;
1749         }
1750
1751         if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
1752                 rts_threshold = nla_get_u32(
1753                         info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
1754                 changed |= WIPHY_PARAM_RTS_THRESHOLD;
1755         }
1756
1757         if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
1758                 coverage_class = nla_get_u8(
1759                         info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
1760                 changed |= WIPHY_PARAM_COVERAGE_CLASS;
1761         }
1762
1763         if (changed) {
1764                 u8 old_retry_short, old_retry_long;
1765                 u32 old_frag_threshold, old_rts_threshold;
1766                 u8 old_coverage_class;
1767
1768                 if (!rdev->ops->set_wiphy_params) {
1769                         result = -EOPNOTSUPP;
1770                         goto bad_res;
1771                 }
1772
1773                 old_retry_short = rdev->wiphy.retry_short;
1774                 old_retry_long = rdev->wiphy.retry_long;
1775                 old_frag_threshold = rdev->wiphy.frag_threshold;
1776                 old_rts_threshold = rdev->wiphy.rts_threshold;
1777                 old_coverage_class = rdev->wiphy.coverage_class;
1778
1779                 if (changed & WIPHY_PARAM_RETRY_SHORT)
1780                         rdev->wiphy.retry_short = retry_short;
1781                 if (changed & WIPHY_PARAM_RETRY_LONG)
1782                         rdev->wiphy.retry_long = retry_long;
1783                 if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
1784                         rdev->wiphy.frag_threshold = frag_threshold;
1785                 if (changed & WIPHY_PARAM_RTS_THRESHOLD)
1786                         rdev->wiphy.rts_threshold = rts_threshold;
1787                 if (changed & WIPHY_PARAM_COVERAGE_CLASS)
1788                         rdev->wiphy.coverage_class = coverage_class;
1789
1790                 result = rdev_set_wiphy_params(rdev, changed);
1791                 if (result) {
1792                         rdev->wiphy.retry_short = old_retry_short;
1793                         rdev->wiphy.retry_long = old_retry_long;
1794                         rdev->wiphy.frag_threshold = old_frag_threshold;
1795                         rdev->wiphy.rts_threshold = old_rts_threshold;
1796                         rdev->wiphy.coverage_class = old_coverage_class;
1797                 }
1798         }
1799
1800  bad_res:
1801         mutex_unlock(&rdev->mtx);
1802         if (netdev)
1803                 dev_put(netdev);
1804         return result;
1805 }
1806
1807 static inline u64 wdev_id(struct wireless_dev *wdev)
1808 {
1809         return (u64)wdev->identifier |
1810                ((u64)wiphy_to_dev(wdev->wiphy)->wiphy_idx << 32);
1811 }
1812
1813 static int nl80211_send_chandef(struct sk_buff *msg,
1814                                  struct cfg80211_chan_def *chandef)
1815 {
1816         WARN_ON(!cfg80211_chandef_valid(chandef));
1817
1818         if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
1819                         chandef->chan->center_freq))
1820                 return -ENOBUFS;
1821         switch (chandef->width) {
1822         case NL80211_CHAN_WIDTH_20_NOHT:
1823         case NL80211_CHAN_WIDTH_20:
1824         case NL80211_CHAN_WIDTH_40:
1825                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
1826                                 cfg80211_get_chandef_type(chandef)))
1827                         return -ENOBUFS;
1828                 break;
1829         default:
1830                 break;
1831         }
1832         if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
1833                 return -ENOBUFS;
1834         if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
1835                 return -ENOBUFS;
1836         if (chandef->center_freq2 &&
1837             nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
1838                 return -ENOBUFS;
1839         return 0;
1840 }
1841
1842 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
1843                               struct cfg80211_registered_device *rdev,
1844                               struct wireless_dev *wdev)
1845 {
1846         struct net_device *dev = wdev->netdev;
1847         void *hdr;
1848
1849         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_INTERFACE);
1850         if (!hdr)
1851                 return -1;
1852
1853         if (dev &&
1854             (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
1855              nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
1856                 goto nla_put_failure;
1857
1858         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
1859             nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
1860             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
1861             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
1862             nla_put_u32(msg, NL80211_ATTR_GENERATION,
1863                         rdev->devlist_generation ^
1864                         (cfg80211_rdev_list_generation << 2)))
1865                 goto nla_put_failure;
1866
1867         if (rdev->ops->get_channel) {
1868                 int ret;
1869                 struct cfg80211_chan_def chandef;
1870
1871                 ret = rdev_get_channel(rdev, wdev, &chandef);
1872                 if (ret == 0) {
1873                         if (nl80211_send_chandef(msg, &chandef))
1874                                 goto nla_put_failure;
1875                 }
1876         }
1877
1878         if (wdev->ssid_len) {
1879                 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid))
1880                         goto nla_put_failure;
1881         }
1882
1883         return genlmsg_end(msg, hdr);
1884
1885  nla_put_failure:
1886         genlmsg_cancel(msg, hdr);
1887         return -EMSGSIZE;
1888 }
1889
1890 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
1891 {
1892         int wp_idx = 0;
1893         int if_idx = 0;
1894         int wp_start = cb->args[0];
1895         int if_start = cb->args[1];
1896         struct cfg80211_registered_device *rdev;
1897         struct wireless_dev *wdev;
1898
1899         mutex_lock(&cfg80211_mutex);
1900         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1901                 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
1902                         continue;
1903                 if (wp_idx < wp_start) {
1904                         wp_idx++;
1905                         continue;
1906                 }
1907                 if_idx = 0;
1908
1909                 mutex_lock(&rdev->devlist_mtx);
1910                 list_for_each_entry(wdev, &rdev->wdev_list, list) {
1911                         if (if_idx < if_start) {
1912                                 if_idx++;
1913                                 continue;
1914                         }
1915                         if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
1916                                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
1917                                                rdev, wdev) < 0) {
1918                                 mutex_unlock(&rdev->devlist_mtx);
1919                                 goto out;
1920                         }
1921                         if_idx++;
1922                 }
1923                 mutex_unlock(&rdev->devlist_mtx);
1924
1925                 wp_idx++;
1926         }
1927  out:
1928         mutex_unlock(&cfg80211_mutex);
1929
1930         cb->args[0] = wp_idx;
1931         cb->args[1] = if_idx;
1932
1933         return skb->len;
1934 }
1935
1936 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
1937 {
1938         struct sk_buff *msg;
1939         struct cfg80211_registered_device *dev = info->user_ptr[0];
1940         struct wireless_dev *wdev = info->user_ptr[1];
1941
1942         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1943         if (!msg)
1944                 return -ENOMEM;
1945
1946         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
1947                                dev, wdev) < 0) {
1948                 nlmsg_free(msg);
1949                 return -ENOBUFS;
1950         }
1951
1952         return genlmsg_reply(msg, info);
1953 }
1954
1955 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
1956         [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
1957         [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
1958         [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
1959         [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
1960         [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
1961 };
1962
1963 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
1964 {
1965         struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
1966         int flag;
1967
1968         *mntrflags = 0;
1969
1970         if (!nla)
1971                 return -EINVAL;
1972
1973         if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
1974                              nla, mntr_flags_policy))
1975                 return -EINVAL;
1976
1977         for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
1978                 if (flags[flag])
1979                         *mntrflags |= (1<<flag);
1980
1981         return 0;
1982 }
1983
1984 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
1985                                struct net_device *netdev, u8 use_4addr,
1986                                enum nl80211_iftype iftype)
1987 {
1988         if (!use_4addr) {
1989                 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
1990                         return -EBUSY;
1991                 return 0;
1992         }
1993
1994         switch (iftype) {
1995         case NL80211_IFTYPE_AP_VLAN:
1996                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
1997                         return 0;
1998                 break;
1999         case NL80211_IFTYPE_STATION:
2000                 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
2001                         return 0;
2002                 break;
2003         default:
2004                 break;
2005         }
2006
2007         return -EOPNOTSUPP;
2008 }
2009
2010 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
2011 {
2012         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2013         struct vif_params params;
2014         int err;
2015         enum nl80211_iftype otype, ntype;
2016         struct net_device *dev = info->user_ptr[1];
2017         u32 _flags, *flags = NULL;
2018         bool change = false;
2019
2020         memset(&params, 0, sizeof(params));
2021
2022         otype = ntype = dev->ieee80211_ptr->iftype;
2023
2024         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2025                 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2026                 if (otype != ntype)
2027                         change = true;
2028                 if (ntype > NL80211_IFTYPE_MAX)
2029                         return -EINVAL;
2030         }
2031
2032         if (info->attrs[NL80211_ATTR_MESH_ID]) {
2033                 struct wireless_dev *wdev = dev->ieee80211_ptr;
2034
2035                 if (ntype != NL80211_IFTYPE_MESH_POINT)
2036                         return -EINVAL;
2037                 if (netif_running(dev))
2038                         return -EBUSY;
2039
2040                 wdev_lock(wdev);
2041                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2042                              IEEE80211_MAX_MESH_ID_LEN);
2043                 wdev->mesh_id_up_len =
2044                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2045                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2046                        wdev->mesh_id_up_len);
2047                 wdev_unlock(wdev);
2048         }
2049
2050         if (info->attrs[NL80211_ATTR_4ADDR]) {
2051                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2052                 change = true;
2053                 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
2054                 if (err)
2055                         return err;
2056         } else {
2057                 params.use_4addr = -1;
2058         }
2059
2060         if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
2061                 if (ntype != NL80211_IFTYPE_MONITOR)
2062                         return -EINVAL;
2063                 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
2064                                           &_flags);
2065                 if (err)
2066                         return err;
2067
2068                 flags = &_flags;
2069                 change = true;
2070         }
2071
2072         if (change)
2073                 err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
2074         else
2075                 err = 0;
2076
2077         if (!err && params.use_4addr != -1)
2078                 dev->ieee80211_ptr->use_4addr = params.use_4addr;
2079
2080         return err;
2081 }
2082
2083 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
2084 {
2085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2086         struct vif_params params;
2087         struct wireless_dev *wdev;
2088         struct sk_buff *msg;
2089         int err;
2090         enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
2091         u32 flags;
2092
2093         memset(&params, 0, sizeof(params));
2094
2095         if (!info->attrs[NL80211_ATTR_IFNAME])
2096                 return -EINVAL;
2097
2098         if (info->attrs[NL80211_ATTR_IFTYPE]) {
2099                 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
2100                 if (type > NL80211_IFTYPE_MAX)
2101                         return -EINVAL;
2102         }
2103
2104         if (!rdev->ops->add_virtual_intf ||
2105             !(rdev->wiphy.interface_modes & (1 << type)))
2106                 return -EOPNOTSUPP;
2107
2108         if (info->attrs[NL80211_ATTR_4ADDR]) {
2109                 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
2110                 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
2111                 if (err)
2112                         return err;
2113         }
2114
2115         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2116         if (!msg)
2117                 return -ENOMEM;
2118
2119         err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
2120                                   info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
2121                                   &flags);
2122         wdev = rdev_add_virtual_intf(rdev,
2123                                 nla_data(info->attrs[NL80211_ATTR_IFNAME]),
2124                                 type, err ? NULL : &flags, &params);
2125         if (IS_ERR(wdev)) {
2126                 nlmsg_free(msg);
2127                 return PTR_ERR(wdev);
2128         }
2129
2130         switch (type) {
2131         case NL80211_IFTYPE_MESH_POINT:
2132                 if (!info->attrs[NL80211_ATTR_MESH_ID])
2133                         break;
2134                 wdev_lock(wdev);
2135                 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
2136                              IEEE80211_MAX_MESH_ID_LEN);
2137                 wdev->mesh_id_up_len =
2138                         nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
2139                 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
2140                        wdev->mesh_id_up_len);
2141                 wdev_unlock(wdev);
2142                 break;
2143         case NL80211_IFTYPE_P2P_DEVICE:
2144                 /*
2145                  * P2P Device doesn't have a netdev, so doesn't go
2146                  * through the netdev notifier and must be added here
2147                  */
2148                 mutex_init(&wdev->mtx);
2149                 INIT_LIST_HEAD(&wdev->event_list);
2150                 spin_lock_init(&wdev->event_lock);
2151                 INIT_LIST_HEAD(&wdev->mgmt_registrations);
2152                 spin_lock_init(&wdev->mgmt_registrations_lock);
2153
2154                 mutex_lock(&rdev->devlist_mtx);
2155                 wdev->identifier = ++rdev->wdev_id;
2156                 list_add_rcu(&wdev->list, &rdev->wdev_list);
2157                 rdev->devlist_generation++;
2158                 mutex_unlock(&rdev->devlist_mtx);
2159                 break;
2160         default:
2161                 break;
2162         }
2163
2164         if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
2165                                rdev, wdev) < 0) {
2166                 nlmsg_free(msg);
2167                 return -ENOBUFS;
2168         }
2169
2170         return genlmsg_reply(msg, info);
2171 }
2172
2173 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
2174 {
2175         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2176         struct wireless_dev *wdev = info->user_ptr[1];
2177
2178         if (!rdev->ops->del_virtual_intf)
2179                 return -EOPNOTSUPP;
2180
2181         /*
2182          * If we remove a wireless device without a netdev then clear
2183          * user_ptr[1] so that nl80211_post_doit won't dereference it
2184          * to check if it needs to do dev_put(). Otherwise it crashes
2185          * since the wdev has been freed, unlike with a netdev where
2186          * we need the dev_put() for the netdev to really be freed.
2187          */
2188         if (!wdev->netdev)
2189                 info->user_ptr[1] = NULL;
2190
2191         return rdev_del_virtual_intf(rdev, wdev);
2192 }
2193
2194 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
2195 {
2196         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2197         struct net_device *dev = info->user_ptr[1];
2198         u16 noack_map;
2199
2200         if (!info->attrs[NL80211_ATTR_NOACK_MAP])
2201                 return -EINVAL;
2202
2203         if (!rdev->ops->set_noack_map)
2204                 return -EOPNOTSUPP;
2205
2206         noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
2207
2208         return rdev_set_noack_map(rdev, dev, noack_map);
2209 }
2210
2211 struct get_key_cookie {
2212         struct sk_buff *msg;
2213         int error;
2214         int idx;
2215 };
2216
2217 static void get_key_callback(void *c, struct key_params *params)
2218 {
2219         struct nlattr *key;
2220         struct get_key_cookie *cookie = c;
2221
2222         if ((params->key &&
2223              nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
2224                      params->key_len, params->key)) ||
2225             (params->seq &&
2226              nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
2227                      params->seq_len, params->seq)) ||
2228             (params->cipher &&
2229              nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
2230                          params->cipher)))
2231                 goto nla_put_failure;
2232
2233         key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
2234         if (!key)
2235                 goto nla_put_failure;
2236
2237         if ((params->key &&
2238              nla_put(cookie->msg, NL80211_KEY_DATA,
2239                      params->key_len, params->key)) ||
2240             (params->seq &&
2241              nla_put(cookie->msg, NL80211_KEY_SEQ,
2242                      params->seq_len, params->seq)) ||
2243             (params->cipher &&
2244              nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
2245                          params->cipher)))
2246                 goto nla_put_failure;
2247
2248         if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
2249                 goto nla_put_failure;
2250
2251         nla_nest_end(cookie->msg, key);
2252
2253         return;
2254  nla_put_failure:
2255         cookie->error = 1;
2256 }
2257
2258 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
2259 {
2260         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2261         int err;
2262         struct net_device *dev = info->user_ptr[1];
2263         u8 key_idx = 0;
2264         const u8 *mac_addr = NULL;
2265         bool pairwise;
2266         struct get_key_cookie cookie = {
2267                 .error = 0,
2268         };
2269         void *hdr;
2270         struct sk_buff *msg;
2271
2272         if (info->attrs[NL80211_ATTR_KEY_IDX])
2273                 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
2274
2275         if (key_idx > 5)
2276                 return -EINVAL;
2277
2278         if (info->attrs[NL80211_ATTR_MAC])
2279                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2280
2281         pairwise = !!mac_addr;
2282         if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
2283                 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
2284                 if (kt >= NUM_NL80211_KEYTYPES)
2285                         return -EINVAL;
2286                 if (kt != NL80211_KEYTYPE_GROUP &&
2287                     kt != NL80211_KEYTYPE_PAIRWISE)
2288                         return -EINVAL;
2289                 pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
2290         }
2291
2292         if (!rdev->ops->get_key)
2293                 return -EOPNOTSUPP;
2294
2295         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
2296         if (!msg)
2297                 return -ENOMEM;
2298
2299         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
2300                              NL80211_CMD_NEW_KEY);
2301         if (IS_ERR(hdr))
2302                 return PTR_ERR(hdr);
2303
2304         cookie.msg = msg;
2305         cookie.idx = key_idx;
2306
2307         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2308             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
2309                 goto nla_put_failure;
2310         if (mac_addr &&
2311             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
2312                 goto nla_put_failure;
2313
2314         if (pairwise && mac_addr &&
2315             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2316                 return -ENOENT;
2317
2318         err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
2319                            get_key_callback);
2320
2321         if (err)
2322                 goto free_msg;
2323
2324         if (cookie.error)
2325                 goto nla_put_failure;
2326
2327         genlmsg_end(msg, hdr);
2328         return genlmsg_reply(msg, info);
2329
2330  nla_put_failure:
2331         err = -ENOBUFS;
2332  free_msg:
2333         nlmsg_free(msg);
2334         return err;
2335 }
2336
2337 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
2338 {
2339         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2340         struct key_parse key;
2341         int err;
2342         struct net_device *dev = info->user_ptr[1];
2343
2344         err = nl80211_parse_key(info, &key);
2345         if (err)
2346                 return err;
2347
2348         if (key.idx < 0)
2349                 return -EINVAL;
2350
2351         /* only support setting default key */
2352         if (!key.def && !key.defmgmt)
2353                 return -EINVAL;
2354
2355         wdev_lock(dev->ieee80211_ptr);
2356
2357         if (key.def) {
2358                 if (!rdev->ops->set_default_key) {
2359                         err = -EOPNOTSUPP;
2360                         goto out;
2361                 }
2362
2363                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2364                 if (err)
2365                         goto out;
2366
2367                 err = rdev_set_default_key(rdev, dev, key.idx,
2368                                                  key.def_uni, key.def_multi);
2369
2370                 if (err)
2371                         goto out;
2372
2373 #ifdef CONFIG_CFG80211_WEXT
2374                 dev->ieee80211_ptr->wext.default_key = key.idx;
2375 #endif
2376         } else {
2377                 if (key.def_uni || !key.def_multi) {
2378                         err = -EINVAL;
2379                         goto out;
2380                 }
2381
2382                 if (!rdev->ops->set_default_mgmt_key) {
2383                         err = -EOPNOTSUPP;
2384                         goto out;
2385                 }
2386
2387                 err = nl80211_key_allowed(dev->ieee80211_ptr);
2388                 if (err)
2389                         goto out;
2390
2391                 err = rdev_set_default_mgmt_key(rdev, dev, key.idx);
2392                 if (err)
2393                         goto out;
2394
2395 #ifdef CONFIG_CFG80211_WEXT
2396                 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
2397 #endif
2398         }
2399
2400  out:
2401         wdev_unlock(dev->ieee80211_ptr);
2402
2403         return err;
2404 }
2405
2406 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
2407 {
2408         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2409         int err;
2410         struct net_device *dev = info->user_ptr[1];
2411         struct key_parse key;
2412         const u8 *mac_addr = NULL;
2413
2414         err = nl80211_parse_key(info, &key);
2415         if (err)
2416                 return err;
2417
2418         if (!key.p.key)
2419                 return -EINVAL;
2420
2421         if (info->attrs[NL80211_ATTR_MAC])
2422                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2423
2424         if (key.type == -1) {
2425                 if (mac_addr)
2426                         key.type = NL80211_KEYTYPE_PAIRWISE;
2427                 else
2428                         key.type = NL80211_KEYTYPE_GROUP;
2429         }
2430
2431         /* for now */
2432         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2433             key.type != NL80211_KEYTYPE_GROUP)
2434                 return -EINVAL;
2435
2436         if (!rdev->ops->add_key)
2437                 return -EOPNOTSUPP;
2438
2439         if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
2440                                            key.type == NL80211_KEYTYPE_PAIRWISE,
2441                                            mac_addr))
2442                 return -EINVAL;
2443
2444         wdev_lock(dev->ieee80211_ptr);
2445         err = nl80211_key_allowed(dev->ieee80211_ptr);
2446         if (!err)
2447                 err = rdev_add_key(rdev, dev, key.idx,
2448                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2449                                     mac_addr, &key.p);
2450         wdev_unlock(dev->ieee80211_ptr);
2451
2452         return err;
2453 }
2454
2455 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
2456 {
2457         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2458         int err;
2459         struct net_device *dev = info->user_ptr[1];
2460         u8 *mac_addr = NULL;
2461         struct key_parse key;
2462
2463         err = nl80211_parse_key(info, &key);
2464         if (err)
2465                 return err;
2466
2467         if (info->attrs[NL80211_ATTR_MAC])
2468                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
2469
2470         if (key.type == -1) {
2471                 if (mac_addr)
2472                         key.type = NL80211_KEYTYPE_PAIRWISE;
2473                 else
2474                         key.type = NL80211_KEYTYPE_GROUP;
2475         }
2476
2477         /* for now */
2478         if (key.type != NL80211_KEYTYPE_PAIRWISE &&
2479             key.type != NL80211_KEYTYPE_GROUP)
2480                 return -EINVAL;
2481
2482         if (!rdev->ops->del_key)
2483                 return -EOPNOTSUPP;
2484
2485         wdev_lock(dev->ieee80211_ptr);
2486         err = nl80211_key_allowed(dev->ieee80211_ptr);
2487
2488         if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
2489             !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
2490                 err = -ENOENT;
2491
2492         if (!err)
2493                 err = rdev_del_key(rdev, dev, key.idx,
2494                                    key.type == NL80211_KEYTYPE_PAIRWISE,
2495                                    mac_addr);
2496
2497 #ifdef CONFIG_CFG80211_WEXT
2498         if (!err) {
2499                 if (key.idx == dev->ieee80211_ptr->wext.default_key)
2500                         dev->ieee80211_ptr->wext.default_key = -1;
2501                 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
2502                         dev->ieee80211_ptr->wext.default_mgmt_key = -1;
2503         }
2504 #endif
2505         wdev_unlock(dev->ieee80211_ptr);
2506
2507         return err;
2508 }
2509
2510 static int nl80211_parse_beacon(struct genl_info *info,
2511                                 struct cfg80211_beacon_data *bcn)
2512 {
2513         bool haveinfo = false;
2514
2515         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
2516             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
2517             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
2518             !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
2519                 return -EINVAL;
2520
2521         memset(bcn, 0, sizeof(*bcn));
2522
2523         if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
2524                 bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2525                 bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
2526                 if (!bcn->head_len)
2527                         return -EINVAL;
2528                 haveinfo = true;
2529         }
2530
2531         if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
2532                 bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2533                 bcn->tail_len =
2534                     nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
2535                 haveinfo = true;
2536         }
2537
2538         if (!haveinfo)
2539                 return -EINVAL;
2540
2541         if (info->attrs[NL80211_ATTR_IE]) {
2542                 bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
2543                 bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
2544         }
2545
2546         if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
2547                 bcn->proberesp_ies =
2548                         nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2549                 bcn->proberesp_ies_len =
2550                         nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
2551         }
2552
2553         if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
2554                 bcn->assocresp_ies =
2555                         nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2556                 bcn->assocresp_ies_len =
2557                         nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
2558         }
2559
2560         if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
2561                 bcn->probe_resp =
2562                         nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
2563                 bcn->probe_resp_len =
2564                         nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
2565         }
2566
2567         return 0;
2568 }
2569
2570 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
2571                                    struct cfg80211_ap_settings *params)
2572 {
2573         struct wireless_dev *wdev;
2574         bool ret = false;
2575
2576         mutex_lock(&rdev->devlist_mtx);
2577
2578         list_for_each_entry(wdev, &rdev->wdev_list, list) {
2579                 if (wdev->iftype != NL80211_IFTYPE_AP &&
2580                     wdev->iftype != NL80211_IFTYPE_P2P_GO)
2581                         continue;
2582
2583                 if (!wdev->preset_chandef.chan)
2584                         continue;
2585
2586                 params->chandef = wdev->preset_chandef;
2587                 ret = true;
2588                 break;
2589         }
2590
2591         mutex_unlock(&rdev->devlist_mtx);
2592
2593         return ret;
2594 }
2595
2596 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
2597                                     enum nl80211_auth_type auth_type,
2598                                     enum nl80211_commands cmd)
2599 {
2600         if (auth_type > NL80211_AUTHTYPE_MAX)
2601                 return false;
2602
2603         switch (cmd) {
2604         case NL80211_CMD_AUTHENTICATE:
2605                 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
2606                     auth_type == NL80211_AUTHTYPE_SAE)
2607                         return false;
2608                 return true;
2609         case NL80211_CMD_CONNECT:
2610         case NL80211_CMD_START_AP:
2611                 /* SAE not supported yet */
2612                 if (auth_type == NL80211_AUTHTYPE_SAE)
2613                         return false;
2614                 return true;
2615         default:
2616                 return false;
2617         }
2618 }
2619
2620 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
2621 {
2622         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2623         struct net_device *dev = info->user_ptr[1];
2624         struct wireless_dev *wdev = dev->ieee80211_ptr;
2625         struct cfg80211_ap_settings params;
2626         int err;
2627
2628         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2629             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2630                 return -EOPNOTSUPP;
2631
2632         if (!rdev->ops->start_ap)
2633                 return -EOPNOTSUPP;
2634
2635         if (wdev->beacon_interval)
2636                 return -EALREADY;
2637
2638         memset(&params, 0, sizeof(params));
2639
2640         /* these are required for START_AP */
2641         if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
2642             !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
2643             !info->attrs[NL80211_ATTR_BEACON_HEAD])
2644                 return -EINVAL;
2645
2646         err = nl80211_parse_beacon(info, &params.beacon);
2647         if (err)
2648                 return err;
2649
2650         params.beacon_interval =
2651                 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
2652         params.dtim_period =
2653                 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
2654
2655         err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
2656         if (err)
2657                 return err;
2658
2659         /*
2660          * In theory, some of these attributes should be required here
2661          * but since they were not used when the command was originally
2662          * added, keep them optional for old user space programs to let
2663          * them continue to work with drivers that do not need the
2664          * additional information -- drivers must check!
2665          */
2666         if (info->attrs[NL80211_ATTR_SSID]) {
2667                 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
2668                 params.ssid_len =
2669                         nla_len(info->attrs[NL80211_ATTR_SSID]);
2670                 if (params.ssid_len == 0 ||
2671                     params.ssid_len > IEEE80211_MAX_SSID_LEN)
2672                         return -EINVAL;
2673         }
2674
2675         if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
2676                 params.hidden_ssid = nla_get_u32(
2677                         info->attrs[NL80211_ATTR_HIDDEN_SSID]);
2678                 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
2679                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
2680                     params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
2681                         return -EINVAL;
2682         }
2683
2684         params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
2685
2686         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
2687                 params.auth_type = nla_get_u32(
2688                         info->attrs[NL80211_ATTR_AUTH_TYPE]);
2689                 if (!nl80211_valid_auth_type(rdev, params.auth_type,
2690                                              NL80211_CMD_START_AP))
2691                         return -EINVAL;
2692         } else
2693                 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
2694
2695         err = nl80211_crypto_settings(rdev, info, &params.crypto,
2696                                       NL80211_MAX_NR_CIPHER_SUITES);
2697         if (err)
2698                 return err;
2699
2700         if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
2701                 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
2702                         return -EOPNOTSUPP;
2703                 params.inactivity_timeout = nla_get_u16(
2704                         info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
2705         }
2706
2707         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
2708                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2709                         return -EINVAL;
2710                 params.p2p_ctwindow =
2711                         nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
2712                 if (params.p2p_ctwindow > 127)
2713                         return -EINVAL;
2714                 if (params.p2p_ctwindow != 0 &&
2715                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
2716                         return -EINVAL;
2717         }
2718
2719         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
2720                 u8 tmp;
2721
2722                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2723                         return -EINVAL;
2724                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
2725                 if (tmp > 1)
2726                         return -EINVAL;
2727                 params.p2p_opp_ps = tmp;
2728                 if (params.p2p_opp_ps != 0 &&
2729                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
2730                         return -EINVAL;
2731         }
2732
2733         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
2734                 err = nl80211_parse_chandef(rdev, info, &params.chandef);
2735                 if (err)
2736                         return err;
2737         } else if (wdev->preset_chandef.chan) {
2738                 params.chandef = wdev->preset_chandef;
2739         } else if (!nl80211_get_ap_channel(rdev, &params))
2740                 return -EINVAL;
2741
2742         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &params.chandef))
2743                 return -EINVAL;
2744
2745         mutex_lock(&rdev->devlist_mtx);
2746         err = cfg80211_can_use_chan(rdev, wdev, params.chandef.chan,
2747                                     CHAN_MODE_SHARED);
2748         mutex_unlock(&rdev->devlist_mtx);
2749
2750         if (err)
2751                 return err;
2752
2753         err = rdev_start_ap(rdev, dev, &params);
2754         if (!err) {
2755                 wdev->preset_chandef = params.chandef;
2756                 wdev->beacon_interval = params.beacon_interval;
2757                 wdev->channel = params.chandef.chan;
2758                 wdev->ssid_len = params.ssid_len;
2759                 memcpy(wdev->ssid, params.ssid, wdev->ssid_len);
2760         }
2761         return err;
2762 }
2763
2764 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
2765 {
2766         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2767         struct net_device *dev = info->user_ptr[1];
2768         struct wireless_dev *wdev = dev->ieee80211_ptr;
2769         struct cfg80211_beacon_data params;
2770         int err;
2771
2772         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
2773             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
2774                 return -EOPNOTSUPP;
2775
2776         if (!rdev->ops->change_beacon)
2777                 return -EOPNOTSUPP;
2778
2779         if (!wdev->beacon_interval)
2780                 return -EINVAL;
2781
2782         err = nl80211_parse_beacon(info, &params);
2783         if (err)
2784                 return err;
2785
2786         return rdev_change_beacon(rdev, dev, &params);
2787 }
2788
2789 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
2790 {
2791         struct cfg80211_registered_device *rdev = info->user_ptr[0];
2792         struct net_device *dev = info->user_ptr[1];
2793
2794         return cfg80211_stop_ap(rdev, dev);
2795 }
2796
2797 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
2798         [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
2799         [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
2800         [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
2801         [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
2802         [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
2803         [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
2804 };
2805
2806 static int parse_station_flags(struct genl_info *info,
2807                                enum nl80211_iftype iftype,
2808                                struct station_parameters *params)
2809 {
2810         struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
2811         struct nlattr *nla;
2812         int flag;
2813
2814         /*
2815          * Try parsing the new attribute first so userspace
2816          * can specify both for older kernels.
2817          */
2818         nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
2819         if (nla) {
2820                 struct nl80211_sta_flag_update *sta_flags;
2821
2822                 sta_flags = nla_data(nla);
2823                 params->sta_flags_mask = sta_flags->mask;
2824                 params->sta_flags_set = sta_flags->set;
2825                 if ((params->sta_flags_mask |
2826                      params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
2827                         return -EINVAL;
2828                 return 0;
2829         }
2830
2831         /* if present, parse the old attribute */
2832
2833         nla = info->attrs[NL80211_ATTR_STA_FLAGS];
2834         if (!nla)
2835                 return 0;
2836
2837         if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
2838                              nla, sta_flags_policy))
2839                 return -EINVAL;
2840
2841         /*
2842          * Only allow certain flags for interface types so that
2843          * other attributes are silently ignored. Remember that
2844          * this is backward compatibility code with old userspace
2845          * and shouldn't be hit in other cases anyway.
2846          */
2847         switch (iftype) {
2848         case NL80211_IFTYPE_AP:
2849         case NL80211_IFTYPE_AP_VLAN:
2850         case NL80211_IFTYPE_P2P_GO:
2851                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2852                                          BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
2853                                          BIT(NL80211_STA_FLAG_WME) |
2854                                          BIT(NL80211_STA_FLAG_MFP);
2855                 break;
2856         case NL80211_IFTYPE_P2P_CLIENT:
2857         case NL80211_IFTYPE_STATION:
2858                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
2859                                          BIT(NL80211_STA_FLAG_TDLS_PEER);
2860                 break;
2861         case NL80211_IFTYPE_MESH_POINT:
2862                 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
2863                                          BIT(NL80211_STA_FLAG_MFP) |
2864                                          BIT(NL80211_STA_FLAG_AUTHORIZED);
2865         default:
2866                 return -EINVAL;
2867         }
2868
2869         for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
2870                 if (flags[flag]) {
2871                         params->sta_flags_set |= (1<<flag);
2872
2873                         /* no longer support new API additions in old API */
2874                         if (flag > NL80211_STA_FLAG_MAX_OLD_API)
2875                                 return -EINVAL;
2876                 }
2877         }
2878
2879         return 0;
2880 }
2881
2882 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
2883                                  int attr)
2884 {
2885         struct nlattr *rate;
2886         u32 bitrate;
2887         u16 bitrate_compat;
2888
2889         rate = nla_nest_start(msg, attr);
2890         if (!rate)
2891                 return false;
2892
2893         /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
2894         bitrate = cfg80211_calculate_bitrate(info);
2895         /* report 16-bit bitrate only if we can */
2896         bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
2897         if (bitrate > 0 &&
2898             nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
2899                 return false;
2900         if (bitrate_compat > 0 &&
2901             nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
2902                 return false;
2903
2904         if (info->flags & RATE_INFO_FLAGS_MCS) {
2905                 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
2906                         return false;
2907                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2908                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2909                         return false;
2910                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2911                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2912                         return false;
2913         } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
2914                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
2915                         return false;
2916                 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
2917                         return false;
2918                 if (info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH &&
2919                     nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH))
2920                         return false;
2921                 if (info->flags & RATE_INFO_FLAGS_80_MHZ_WIDTH &&
2922                     nla_put_flag(msg, NL80211_RATE_INFO_80_MHZ_WIDTH))
2923                         return false;
2924                 if (info->flags & RATE_INFO_FLAGS_80P80_MHZ_WIDTH &&
2925                     nla_put_flag(msg, NL80211_RATE_INFO_80P80_MHZ_WIDTH))
2926                         return false;
2927                 if (info->flags & RATE_INFO_FLAGS_160_MHZ_WIDTH &&
2928                     nla_put_flag(msg, NL80211_RATE_INFO_160_MHZ_WIDTH))
2929                         return false;
2930                 if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
2931                     nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
2932                         return false;
2933         }
2934
2935         nla_nest_end(msg, rate);
2936         return true;
2937 }
2938
2939 static int nl80211_send_station(struct sk_buff *msg, u32 portid, u32 seq,
2940                                 int flags,
2941                                 struct cfg80211_registered_device *rdev,
2942                                 struct net_device *dev,
2943                                 const u8 *mac_addr, struct station_info *sinfo)
2944 {
2945         void *hdr;
2946         struct nlattr *sinfoattr, *bss_param;
2947
2948         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
2949         if (!hdr)
2950                 return -1;
2951
2952         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
2953             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
2954             nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
2955                 goto nla_put_failure;
2956
2957         sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
2958         if (!sinfoattr)
2959                 goto nla_put_failure;
2960         if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
2961             nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
2962                         sinfo->connected_time))
2963                 goto nla_put_failure;
2964         if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
2965             nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
2966                         sinfo->inactive_time))
2967                 goto nla_put_failure;
2968         if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
2969             nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
2970                         sinfo->rx_bytes))
2971                 goto nla_put_failure;
2972         if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
2973             nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
2974                         sinfo->tx_bytes))
2975                 goto nla_put_failure;
2976         if ((sinfo->filled & STATION_INFO_LLID) &&
2977             nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
2978                 goto nla_put_failure;
2979         if ((sinfo->filled & STATION_INFO_PLID) &&
2980             nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
2981                 goto nla_put_failure;
2982         if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
2983             nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
2984                        sinfo->plink_state))
2985                 goto nla_put_failure;
2986         switch (rdev->wiphy.signal_type) {
2987         case CFG80211_SIGNAL_TYPE_MBM:
2988                 if ((sinfo->filled & STATION_INFO_SIGNAL) &&
2989                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
2990                                sinfo->signal))
2991                         goto nla_put_failure;
2992                 if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
2993                     nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
2994                                sinfo->signal_avg))
2995                         goto nla_put_failure;
2996                 break;
2997         default:
2998                 break;
2999         }
3000         if (sinfo->filled & STATION_INFO_TX_BITRATE) {
3001                 if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
3002                                           NL80211_STA_INFO_TX_BITRATE))
3003                         goto nla_put_failure;
3004         }
3005         if (sinfo->filled & STATION_INFO_RX_BITRATE) {
3006                 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
3007                                           NL80211_STA_INFO_RX_BITRATE))
3008                         goto nla_put_failure;
3009         }
3010         if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
3011             nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
3012                         sinfo->rx_packets))
3013                 goto nla_put_failure;
3014         if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
3015             nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
3016                         sinfo->tx_packets))
3017                 goto nla_put_failure;
3018         if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
3019             nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
3020                         sinfo->tx_retries))
3021                 goto nla_put_failure;
3022         if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
3023             nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
3024                         sinfo->tx_failed))
3025                 goto nla_put_failure;
3026         if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
3027             nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
3028                         sinfo->beacon_loss_count))
3029                 goto nla_put_failure;
3030         if (sinfo->filled & STATION_INFO_BSS_PARAM) {
3031                 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
3032                 if (!bss_param)
3033                         goto nla_put_failure;
3034
3035                 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
3036                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
3037                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
3038                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
3039                     ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
3040                      nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
3041                     nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
3042                                sinfo->bss_param.dtim_period) ||
3043                     nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
3044                                 sinfo->bss_param.beacon_interval))
3045                         goto nla_put_failure;
3046
3047                 nla_nest_end(msg, bss_param);
3048         }
3049         if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
3050             nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
3051                     sizeof(struct nl80211_sta_flag_update),
3052                     &sinfo->sta_flags))
3053                 goto nla_put_failure;
3054         if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
3055                 nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
3056                             sinfo->t_offset))
3057                 goto nla_put_failure;
3058         nla_nest_end(msg, sinfoattr);
3059
3060         if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
3061             nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
3062                     sinfo->assoc_req_ies))
3063                 goto nla_put_failure;
3064
3065         return genlmsg_end(msg, hdr);
3066
3067  nla_put_failure:
3068         genlmsg_cancel(msg, hdr);
3069         return -EMSGSIZE;
3070 }
3071
3072 static int nl80211_dump_station(struct sk_buff *skb,
3073                                 struct netlink_callback *cb)
3074 {
3075         struct station_info sinfo;
3076         struct cfg80211_registered_device *dev;
3077         struct net_device *netdev;
3078         u8 mac_addr[ETH_ALEN];
3079         int sta_idx = cb->args[1];
3080         int err;
3081
3082         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3083         if (err)
3084                 return err;
3085
3086         if (!dev->ops->dump_station) {
3087                 err = -EOPNOTSUPP;
3088                 goto out_err;
3089         }
3090
3091         while (1) {
3092                 memset(&sinfo, 0, sizeof(sinfo));
3093                 err = rdev_dump_station(dev, netdev, sta_idx,
3094                                         mac_addr, &sinfo);
3095                 if (err == -ENOENT)
3096                         break;
3097                 if (err)
3098                         goto out_err;
3099
3100                 if (nl80211_send_station(skb,
3101                                 NETLINK_CB(cb->skb).portid,
3102                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
3103                                 dev, netdev, mac_addr,
3104                                 &sinfo) < 0)
3105                         goto out;
3106
3107                 sta_idx++;
3108         }
3109
3110
3111  out:
3112         cb->args[1] = sta_idx;
3113         err = skb->len;
3114  out_err:
3115         nl80211_finish_netdev_dump(dev);
3116
3117         return err;
3118 }
3119
3120 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
3121 {
3122         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3123         struct net_device *dev = info->user_ptr[1];
3124         struct station_info sinfo;
3125         struct sk_buff *msg;
3126         u8 *mac_addr = NULL;
3127         int err;
3128
3129         memset(&sinfo, 0, sizeof(sinfo));
3130
3131         if (!info->attrs[NL80211_ATTR_MAC])
3132                 return -EINVAL;
3133
3134         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3135
3136         if (!rdev->ops->get_station)
3137                 return -EOPNOTSUPP;
3138
3139         err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
3140         if (err)
3141                 return err;
3142
3143         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3144         if (!msg)
3145                 return -ENOMEM;
3146
3147         if (nl80211_send_station(msg, info->snd_portid, info->snd_seq, 0,
3148                                  rdev, dev, mac_addr, &sinfo) < 0) {
3149                 nlmsg_free(msg);
3150                 return -ENOBUFS;
3151         }
3152
3153         return genlmsg_reply(msg, info);
3154 }
3155
3156 /*
3157  * Get vlan interface making sure it is running and on the right wiphy.
3158  */
3159 static struct net_device *get_vlan(struct genl_info *info,
3160                                    struct cfg80211_registered_device *rdev)
3161 {
3162         struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
3163         struct net_device *v;
3164         int ret;
3165
3166         if (!vlanattr)
3167                 return NULL;
3168
3169         v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
3170         if (!v)
3171                 return ERR_PTR(-ENODEV);
3172
3173         if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
3174                 ret = -EINVAL;
3175                 goto error;
3176         }
3177
3178         if (!netif_running(v)) {
3179                 ret = -ENETDOWN;
3180                 goto error;
3181         }
3182
3183         return v;
3184  error:
3185         dev_put(v);
3186         return ERR_PTR(ret);
3187 }
3188
3189 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
3190 {
3191         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3192         int err;
3193         struct net_device *dev = info->user_ptr[1];
3194         struct station_parameters params;
3195         u8 *mac_addr = NULL;
3196
3197         memset(&params, 0, sizeof(params));
3198
3199         params.listen_interval = -1;
3200         params.plink_state = -1;
3201
3202         if (info->attrs[NL80211_ATTR_STA_AID])
3203                 return -EINVAL;
3204
3205         if (!info->attrs[NL80211_ATTR_MAC])
3206                 return -EINVAL;
3207
3208         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3209
3210         if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
3211                 params.supported_rates =
3212                         nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3213                 params.supported_rates_len =
3214                         nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3215         }
3216
3217         if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3218                 params.listen_interval =
3219                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3220
3221         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3222                 params.ht_capa =
3223                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3224
3225         if (!rdev->ops->change_station)
3226                 return -EOPNOTSUPP;
3227
3228         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3229                 return -EINVAL;
3230
3231         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3232                 params.plink_action =
3233                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3234
3235         if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
3236                 params.plink_state =
3237                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
3238
3239         switch (dev->ieee80211_ptr->iftype) {
3240         case NL80211_IFTYPE_AP:
3241         case NL80211_IFTYPE_AP_VLAN:
3242         case NL80211_IFTYPE_P2P_GO:
3243                 /* disallow mesh-specific things */
3244                 if (params.plink_action)
3245                         return -EINVAL;
3246
3247                 /* TDLS can't be set, ... */
3248                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3249                         return -EINVAL;
3250                 /*
3251                  * ... but don't bother the driver with it. This works around
3252                  * a hostapd/wpa_supplicant issue -- it always includes the
3253                  * TLDS_PEER flag in the mask even for AP mode.
3254                  */
3255                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3256
3257                 /* accept only the listed bits */
3258                 if (params.sta_flags_mask &
3259                                 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
3260                                   BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
3261                                   BIT(NL80211_STA_FLAG_WME) |
3262                                   BIT(NL80211_STA_FLAG_MFP)))
3263                         return -EINVAL;
3264
3265                 /* must be last in here for error handling */
3266                 params.vlan = get_vlan(info, rdev);
3267                 if (IS_ERR(params.vlan))
3268                         return PTR_ERR(params.vlan);
3269                 break;
3270         case NL80211_IFTYPE_P2P_CLIENT:
3271         case NL80211_IFTYPE_STATION:
3272                 /*
3273                  * Don't allow userspace to change the TDLS_PEER flag,
3274                  * but silently ignore attempts to change it since we
3275                  * don't have state here to verify that it doesn't try
3276                  * to change the flag.
3277                  */
3278                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3279                 /* fall through */
3280         case NL80211_IFTYPE_ADHOC:
3281                 /* disallow things sta doesn't support */
3282                 if (params.plink_action)
3283                         return -EINVAL;
3284                 if (params.ht_capa)
3285                         return -EINVAL;
3286                 if (params.listen_interval >= 0)
3287                         return -EINVAL;
3288                 /* reject any changes other than AUTHORIZED */
3289                 if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
3290                         return -EINVAL;
3291                 break;
3292         case NL80211_IFTYPE_MESH_POINT:
3293                 /* disallow things mesh doesn't support */
3294                 if (params.vlan)
3295                         return -EINVAL;
3296                 if (params.ht_capa)
3297                         return -EINVAL;
3298                 if (params.listen_interval >= 0)
3299                         return -EINVAL;
3300                 /*
3301                  * No special handling for TDLS here -- the userspace
3302                  * mesh code doesn't have this bug.
3303                  */
3304                 if (params.sta_flags_mask &
3305                                 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
3306                                   BIT(NL80211_STA_FLAG_MFP) |
3307                                   BIT(NL80211_STA_FLAG_AUTHORIZED)))
3308                         return -EINVAL;
3309                 break;
3310         default:
3311                 return -EOPNOTSUPP;
3312         }
3313
3314         /* be aware of params.vlan when changing code here */
3315
3316         err = rdev_change_station(rdev, dev, mac_addr, &params);
3317
3318         if (params.vlan)
3319                 dev_put(params.vlan);
3320
3321         return err;
3322 }
3323
3324 static struct nla_policy
3325 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
3326         [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
3327         [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
3328 };
3329
3330 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
3331 {
3332         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3333         int err;
3334         struct net_device *dev = info->user_ptr[1];
3335         struct station_parameters params;
3336         u8 *mac_addr = NULL;
3337
3338         memset(&params, 0, sizeof(params));
3339
3340         if (!info->attrs[NL80211_ATTR_MAC])
3341                 return -EINVAL;
3342
3343         if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
3344                 return -EINVAL;
3345
3346         if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
3347                 return -EINVAL;
3348
3349         if (!info->attrs[NL80211_ATTR_STA_AID])
3350                 return -EINVAL;
3351
3352         mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3353         params.supported_rates =
3354                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3355         params.supported_rates_len =
3356                 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
3357         params.listen_interval =
3358                 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
3359
3360         params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
3361         if (!params.aid || params.aid > IEEE80211_MAX_AID)
3362                 return -EINVAL;
3363
3364         if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
3365                 params.ht_capa =
3366                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
3367
3368         if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
3369                 params.vht_capa =
3370                         nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
3371
3372         if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
3373                 params.plink_action =
3374                     nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
3375
3376         if (!rdev->ops->add_station)
3377                 return -EOPNOTSUPP;
3378
3379         if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
3380                 return -EINVAL;
3381
3382         switch (dev->ieee80211_ptr->iftype) {
3383         case NL80211_IFTYPE_AP:
3384         case NL80211_IFTYPE_AP_VLAN:
3385         case NL80211_IFTYPE_P2P_GO:
3386                 /* parse WME attributes if sta is WME capable */
3387                 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
3388                     (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
3389                     info->attrs[NL80211_ATTR_STA_WME]) {
3390                         struct nlattr *tb[NL80211_STA_WME_MAX + 1];
3391                         struct nlattr *nla;
3392
3393                         nla = info->attrs[NL80211_ATTR_STA_WME];
3394                         err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
3395                                                nl80211_sta_wme_policy);
3396                         if (err)
3397                                 return err;
3398
3399                         if (tb[NL80211_STA_WME_UAPSD_QUEUES])
3400                                 params.uapsd_queues =
3401                                      nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
3402                         if (params.uapsd_queues &
3403                                         ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
3404                                 return -EINVAL;
3405
3406                         if (tb[NL80211_STA_WME_MAX_SP])
3407                                 params.max_sp =
3408                                      nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
3409
3410                         if (params.max_sp &
3411                                         ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
3412                                 return -EINVAL;
3413
3414                         params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
3415                 }
3416                 /* TDLS peers cannot be added */
3417                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3418                         return -EINVAL;
3419                 /* but don't bother the driver with it */
3420                 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
3421
3422                 /* must be last in here for error handling */
3423                 params.vlan = get_vlan(info, rdev);
3424                 if (IS_ERR(params.vlan))
3425                         return PTR_ERR(params.vlan);
3426                 break;
3427         case NL80211_IFTYPE_MESH_POINT:
3428                 /* TDLS peers cannot be added */
3429                 if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
3430                         return -EINVAL;
3431                 break;
3432         case NL80211_IFTYPE_STATION:
3433                 /* Only TDLS peers can be added */
3434                 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
3435                         return -EINVAL;
3436                 /* Can only add if TDLS ... */
3437                 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
3438                         return -EOPNOTSUPP;
3439                 /* ... with external setup is supported */
3440                 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
3441                         return -EOPNOTSUPP;
3442                 break;
3443         default:
3444                 return -EOPNOTSUPP;
3445         }
3446
3447         /* be aware of params.vlan when changing code here */
3448
3449         err = rdev_add_station(rdev, dev, mac_addr, &params);
3450
3451         if (params.vlan)
3452                 dev_put(params.vlan);
3453         return err;
3454 }
3455
3456 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
3457 {
3458         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3459         struct net_device *dev = info->user_ptr[1];
3460         u8 *mac_addr = NULL;
3461
3462         if (info->attrs[NL80211_ATTR_MAC])
3463                 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
3464
3465         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3466             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
3467             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
3468             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3469                 return -EINVAL;
3470
3471         if (!rdev->ops->del_station)
3472                 return -EOPNOTSUPP;
3473
3474         return rdev_del_station(rdev, dev, mac_addr);
3475 }
3476
3477 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
3478                                 int flags, struct net_device *dev,
3479                                 u8 *dst, u8 *next_hop,
3480                                 struct mpath_info *pinfo)
3481 {
3482         void *hdr;
3483         struct nlattr *pinfoattr;
3484
3485         hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_STATION);
3486         if (!hdr)
3487                 return -1;
3488
3489         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3490             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
3491             nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
3492             nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
3493                 goto nla_put_failure;
3494
3495         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
3496         if (!pinfoattr)
3497                 goto nla_put_failure;
3498         if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
3499             nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
3500                         pinfo->frame_qlen))
3501                 goto nla_put_failure;
3502         if (((pinfo->filled & MPATH_INFO_SN) &&
3503              nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
3504             ((pinfo->filled & MPATH_INFO_METRIC) &&
3505              nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
3506                          pinfo->metric)) ||
3507             ((pinfo->filled & MPATH_INFO_EXPTIME) &&
3508              nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
3509                          pinfo->exptime)) ||
3510             ((pinfo->filled & MPATH_INFO_FLAGS) &&
3511              nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
3512                         pinfo->flags)) ||
3513             ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
3514              nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
3515                          pinfo->discovery_timeout)) ||
3516             ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
3517              nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
3518                         pinfo->discovery_retries)))
3519                 goto nla_put_failure;
3520
3521         nla_nest_end(msg, pinfoattr);
3522
3523         return genlmsg_end(msg, hdr);
3524
3525  nla_put_failure:
3526         genlmsg_cancel(msg, hdr);
3527         return -EMSGSIZE;
3528 }
3529
3530 static int nl80211_dump_mpath(struct sk_buff *skb,
3531                               struct netlink_callback *cb)
3532 {
3533         struct mpath_info pinfo;
3534         struct cfg80211_registered_device *dev;
3535         struct net_device *netdev;
3536         u8 dst[ETH_ALEN];
3537         u8 next_hop[ETH_ALEN];
3538         int path_idx = cb->args[1];
3539         int err;
3540
3541         err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
3542         if (err)
3543                 return err;
3544
3545         if (!dev->ops->dump_mpath) {
3546                 err = -EOPNOTSUPP;
3547                 goto out_err;
3548         }
3549
3550         if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
3551                 err = -EOPNOTSUPP;
3552                 goto out_err;
3553         }
3554
3555         while (1) {
3556                 err = rdev_dump_mpath(dev, netdev, path_idx, dst, next_hop,
3557                                       &pinfo);
3558                 if (err == -ENOENT)
3559                         break;
3560                 if (err)
3561                         goto out_err;
3562
3563                 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
3564                                        cb->nlh->nlmsg_seq, NLM_F_MULTI,
3565                                        netdev, dst, next_hop,
3566                                        &pinfo) < 0)
3567                         goto out;
3568
3569                 path_idx++;
3570         }
3571
3572
3573  out:
3574         cb->args[1] = path_idx;
3575         err = skb->len;
3576  out_err:
3577         nl80211_finish_netdev_dump(dev);
3578         return err;
3579 }
3580
3581 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
3582 {
3583         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3584         int err;
3585         struct net_device *dev = info->user_ptr[1];
3586         struct mpath_info pinfo;
3587         struct sk_buff *msg;
3588         u8 *dst = NULL;
3589         u8 next_hop[ETH_ALEN];
3590
3591         memset(&pinfo, 0, sizeof(pinfo));
3592
3593         if (!info->attrs[NL80211_ATTR_MAC])
3594                 return -EINVAL;
3595
3596         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3597
3598         if (!rdev->ops->get_mpath)
3599                 return -EOPNOTSUPP;
3600
3601         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3602                 return -EOPNOTSUPP;
3603
3604         err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
3605         if (err)
3606                 return err;
3607
3608         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3609         if (!msg)
3610                 return -ENOMEM;
3611
3612         if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
3613                                  dev, dst, next_hop, &pinfo) < 0) {
3614                 nlmsg_free(msg);
3615                 return -ENOBUFS;
3616         }
3617
3618         return genlmsg_reply(msg, info);
3619 }
3620
3621 static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
3622 {
3623         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3624         struct net_device *dev = info->user_ptr[1];
3625         u8 *dst = NULL;
3626         u8 *next_hop = NULL;
3627
3628         if (!info->attrs[NL80211_ATTR_MAC])
3629                 return -EINVAL;
3630
3631         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3632                 return -EINVAL;
3633
3634         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3635         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3636
3637         if (!rdev->ops->change_mpath)
3638                 return -EOPNOTSUPP;
3639
3640         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3641                 return -EOPNOTSUPP;
3642
3643         return rdev_change_mpath(rdev, dev, dst, next_hop);
3644 }
3645
3646 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
3647 {
3648         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3649         struct net_device *dev = info->user_ptr[1];
3650         u8 *dst = NULL;
3651         u8 *next_hop = NULL;
3652
3653         if (!info->attrs[NL80211_ATTR_MAC])
3654                 return -EINVAL;
3655
3656         if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
3657                 return -EINVAL;
3658
3659         dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3660         next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
3661
3662         if (!rdev->ops->add_mpath)
3663                 return -EOPNOTSUPP;
3664
3665         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
3666                 return -EOPNOTSUPP;
3667
3668         return rdev_add_mpath(rdev, dev, dst, next_hop);
3669 }
3670
3671 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
3672 {
3673         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3674         struct net_device *dev = info->user_ptr[1];
3675         u8 *dst = NULL;
3676
3677         if (info->attrs[NL80211_ATTR_MAC])
3678                 dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
3679
3680         if (!rdev->ops->del_mpath)
3681                 return -EOPNOTSUPP;
3682
3683         return rdev_del_mpath(rdev, dev, dst);
3684 }
3685
3686 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
3687 {
3688         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3689         struct net_device *dev = info->user_ptr[1];
3690         struct bss_parameters params;
3691
3692         memset(&params, 0, sizeof(params));
3693         /* default to not changing parameters */
3694         params.use_cts_prot = -1;
3695         params.use_short_preamble = -1;
3696         params.use_short_slot_time = -1;
3697         params.ap_isolate = -1;
3698         params.ht_opmode = -1;
3699         params.p2p_ctwindow = -1;
3700         params.p2p_opp_ps = -1;
3701
3702         if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
3703                 params.use_cts_prot =
3704                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
3705         if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
3706                 params.use_short_preamble =
3707                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
3708         if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
3709                 params.use_short_slot_time =
3710                     nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
3711         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
3712                 params.basic_rates =
3713                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3714                 params.basic_rates_len =
3715                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
3716         }
3717         if (info->attrs[NL80211_ATTR_AP_ISOLATE])
3718                 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
3719         if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
3720                 params.ht_opmode =
3721                         nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
3722
3723         if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
3724                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3725                         return -EINVAL;
3726                 params.p2p_ctwindow =
3727                         nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
3728                 if (params.p2p_ctwindow < 0)
3729                         return -EINVAL;
3730                 if (params.p2p_ctwindow != 0 &&
3731                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
3732                         return -EINVAL;
3733         }
3734
3735         if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
3736                 u8 tmp;
3737
3738                 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3739                         return -EINVAL;
3740                 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
3741                 if (tmp > 1)
3742                         return -EINVAL;
3743                 params.p2p_opp_ps = tmp;
3744                 if (params.p2p_opp_ps &&
3745                     !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
3746                         return -EINVAL;
3747         }
3748
3749         if (!rdev->ops->change_bss)
3750                 return -EOPNOTSUPP;
3751
3752         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
3753             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
3754                 return -EOPNOTSUPP;
3755
3756         return rdev_change_bss(rdev, dev, &params);
3757 }
3758
3759 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
3760         [NL80211_ATTR_REG_RULE_FLAGS]           = { .type = NLA_U32 },
3761         [NL80211_ATTR_FREQ_RANGE_START]         = { .type = NLA_U32 },
3762         [NL80211_ATTR_FREQ_RANGE_END]           = { .type = NLA_U32 },
3763         [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
3764         [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]  = { .type = NLA_U32 },
3765         [NL80211_ATTR_POWER_RULE_MAX_EIRP]      = { .type = NLA_U32 },
3766 };
3767
3768 static int parse_reg_rule(struct nlattr *tb[],
3769         struct ieee80211_reg_rule *reg_rule)
3770 {
3771         struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
3772         struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
3773
3774         if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
3775                 return -EINVAL;
3776         if (!tb[NL80211_ATTR_FREQ_RANGE_START])
3777                 return -EINVAL;
3778         if (!tb[NL80211_ATTR_FREQ_RANGE_END])
3779                 return -EINVAL;
3780         if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
3781                 return -EINVAL;
3782         if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
3783                 return -EINVAL;
3784
3785         reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
3786
3787         freq_range->start_freq_khz =
3788                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
3789         freq_range->end_freq_khz =
3790                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
3791         freq_range->max_bandwidth_khz =
3792                 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
3793
3794         power_rule->max_eirp =
3795                 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
3796
3797         if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
3798                 power_rule->max_antenna_gain =
3799                         nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
3800
3801         return 0;
3802 }
3803
3804 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
3805 {
3806         int r;
3807         char *data = NULL;
3808         enum nl80211_user_reg_hint_type user_reg_hint_type;
3809
3810         /*
3811          * You should only get this when cfg80211 hasn't yet initialized
3812          * completely when built-in to the kernel right between the time
3813          * window between nl80211_init() and regulatory_init(), if that is
3814          * even possible.
3815          */
3816         mutex_lock(&cfg80211_mutex);
3817         if (unlikely(!cfg80211_regdomain)) {
3818                 mutex_unlock(&cfg80211_mutex);
3819                 return -EINPROGRESS;
3820         }
3821         mutex_unlock(&cfg80211_mutex);
3822
3823         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
3824                 return -EINVAL;
3825
3826         data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
3827
3828         if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
3829                 user_reg_hint_type =
3830                   nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
3831         else
3832                 user_reg_hint_type = NL80211_USER_REG_HINT_USER;
3833
3834         switch (user_reg_hint_type) {
3835         case NL80211_USER_REG_HINT_USER:
3836         case NL80211_USER_REG_HINT_CELL_BASE:
3837                 break;
3838         default:
3839                 return -EINVAL;
3840         }
3841
3842         r = regulatory_hint_user(data, user_reg_hint_type);
3843
3844         return r;
3845 }
3846
3847 static int nl80211_get_mesh_config(struct sk_buff *skb,
3848                                    struct genl_info *info)
3849 {
3850         struct cfg80211_registered_device *rdev = info->user_ptr[0];
3851         struct net_device *dev = info->user_ptr[1];
3852         struct wireless_dev *wdev = dev->ieee80211_ptr;
3853         struct mesh_config cur_params;
3854         int err = 0;
3855         void *hdr;
3856         struct nlattr *pinfoattr;
3857         struct sk_buff *msg;
3858
3859         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
3860                 return -EOPNOTSUPP;
3861
3862         if (!rdev->ops->get_mesh_config)
3863                 return -EOPNOTSUPP;
3864
3865         wdev_lock(wdev);
3866         /* If not connected, get default parameters */
3867         if (!wdev->mesh_id_len)
3868                 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
3869         else
3870                 err = rdev_get_mesh_config(rdev, dev, &cur_params);
3871         wdev_unlock(wdev);
3872
3873         if (err)
3874                 return err;
3875
3876         /* Draw up a netlink message to send back */
3877         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3878         if (!msg)
3879                 return -ENOMEM;
3880         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
3881                              NL80211_CMD_GET_MESH_CONFIG);
3882         if (!hdr)
3883                 goto out;
3884         pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
3885         if (!pinfoattr)
3886                 goto nla_put_failure;
3887         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
3888             nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
3889                         cur_params.dot11MeshRetryTimeout) ||
3890             nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
3891                         cur_params.dot11MeshConfirmTimeout) ||
3892             nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
3893                         cur_params.dot11MeshHoldingTimeout) ||
3894             nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
3895                         cur_params.dot11MeshMaxPeerLinks) ||
3896             nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
3897                        cur_params.dot11MeshMaxRetries) ||
3898             nla_put_u8(msg, NL80211_MESHCONF_TTL,
3899                        cur_params.dot11MeshTTL) ||
3900             nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
3901                        cur_params.element_ttl) ||
3902             nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
3903                        cur_params.auto_open_plinks) ||
3904             nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
3905                         cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
3906             nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
3907                        cur_params.dot11MeshHWMPmaxPREQretries) ||
3908             nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
3909                         cur_params.path_refresh_time) ||
3910             nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
3911                         cur_params.min_discovery_timeout) ||
3912             nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
3913                         cur_params.dot11MeshHWMPactivePathTimeout) ||
3914             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
3915                         cur_params.dot11MeshHWMPpreqMinInterval) ||
3916             nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
3917                         cur_params.dot11MeshHWMPperrMinInterval) ||
3918             nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
3919                         cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
3920             nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
3921                        cur_params.dot11MeshHWMPRootMode) ||
3922             nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
3923                         cur_params.dot11MeshHWMPRannInterval) ||
3924             nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
3925                        cur_params.dot11MeshGateAnnouncementProtocol) ||
3926             nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
3927                        cur_params.dot11MeshForwarding) ||
3928             nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
3929                         cur_params.rssi_threshold) ||
3930             nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
3931                         cur_params.ht_opmode) ||
3932             nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
3933                         cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
3934             nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
3935                         cur_params.dot11MeshHWMProotInterval) ||
3936             nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
3937                         cur_params.dot11MeshHWMPconfirmationInterval))
3938                 goto nla_put_failure;
3939         nla_nest_end(msg, pinfoattr);
3940         genlmsg_end(msg, hdr);
3941         return genlmsg_reply(msg, info);
3942
3943  nla_put_failure:
3944         genlmsg_cancel(msg, hdr);
3945  out:
3946         nlmsg_free(msg);
3947         return -ENOBUFS;
3948 }
3949
3950 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
3951         [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
3952         [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
3953         [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
3954         [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
3955         [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
3956         [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
3957         [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
3958         [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
3959         [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
3960         [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
3961         [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
3962         [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
3963         [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
3964         [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
3965         [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
3966         [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
3967         [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
3968         [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
3969         [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
3970         [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
3971         [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
3972         [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
3973         [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
3974         [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
3975         [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
3976 };
3977
3978 static const struct nla_policy
3979         nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
3980         [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
3981         [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
3982         [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
3983         [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
3984         [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
3985                                     .len = IEEE80211_MAX_DATA_LEN },
3986         [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
3987 };
3988
3989 static int nl80211_parse_mesh_config(struct genl_info *info,
3990                                      struct mesh_config *cfg,
3991                                      u32 *mask_out)
3992 {
3993         struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
3994         u32 mask = 0;
3995
3996 #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
3997 do {\
3998         if (table[attr_num]) {\
3999                 cfg->param = nla_fn(table[attr_num]); \
4000                 mask |= (1 << (attr_num - 1)); \
4001         } \
4002 } while (0);\
4003
4004
4005         if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
4006                 return -EINVAL;
4007         if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
4008                              info->attrs[NL80211_ATTR_MESH_CONFIG],
4009                              nl80211_meshconf_params_policy))
4010                 return -EINVAL;
4011
4012         /* This makes sure that there aren't more than 32 mesh config
4013          * parameters (otherwise our bitfield scheme would not work.) */
4014         BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
4015
4016         /* Fill in the params struct */
4017         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
4018                                   mask, NL80211_MESHCONF_RETRY_TIMEOUT,
4019                                   nla_get_u16);
4020         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
4021                                   mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
4022                                   nla_get_u16);
4023         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
4024                                   mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
4025                                   nla_get_u16);
4026         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
4027                                   mask, NL80211_MESHCONF_MAX_PEER_LINKS,
4028                                   nla_get_u16);
4029         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
4030                                   mask, NL80211_MESHCONF_MAX_RETRIES,
4031                                   nla_get_u8);
4032         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
4033                                   mask, NL80211_MESHCONF_TTL, nla_get_u8);
4034         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
4035                                   mask, NL80211_MESHCONF_ELEMENT_TTL,
4036                                   nla_get_u8);
4037         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
4038                                   mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
4039                                   nla_get_u8);
4040         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
4041                                   NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
4042                                   nla_get_u32);
4043         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
4044                                   mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
4045                                   nla_get_u8);
4046         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
4047                                   mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
4048                                   nla_get_u32);
4049         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
4050                                   mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
4051                                   nla_get_u16);
4052         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
4053                                   NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
4054                                   nla_get_u32);
4055         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
4056                                   mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
4057                                   nla_get_u16);
4058         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
4059                                   mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
4060                                   nla_get_u16);
4061         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4062                                   dot11MeshHWMPnetDiameterTraversalTime, mask,
4063                                   NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
4064                                   nla_get_u16);
4065         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
4066                                   NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
4067         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
4068                                   NL80211_MESHCONF_HWMP_RANN_INTERVAL,
4069                                   nla_get_u16);
4070         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4071                                   dot11MeshGateAnnouncementProtocol, mask,
4072                                   NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
4073                                   nla_get_u8);
4074         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
4075                                   mask, NL80211_MESHCONF_FORWARDING,
4076                                   nla_get_u8);
4077         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
4078                                   mask, NL80211_MESHCONF_RSSI_THRESHOLD,
4079                                   nla_get_u32);
4080         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
4081                                   mask, NL80211_MESHCONF_HT_OPMODE,
4082                                   nla_get_u16);
4083         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
4084                                   mask,
4085                                   NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
4086                                   nla_get_u32);
4087         FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
4088                                   mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
4089                                   nla_get_u16);
4090         FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
4091                                   dot11MeshHWMPconfirmationInterval, mask,
4092                                   NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
4093                                   nla_get_u16);
4094         if (mask_out)
4095                 *mask_out = mask;
4096
4097         return 0;
4098
4099 #undef FILL_IN_MESH_PARAM_IF_SET
4100 }
4101
4102 static int nl80211_parse_mesh_setup(struct genl_info *info,
4103                                      struct mesh_setup *setup)
4104 {
4105         struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
4106
4107         if (!info->attrs[NL80211_ATTR_MESH_SETUP])
4108                 return -EINVAL;
4109         if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
4110                              info->attrs[NL80211_ATTR_MESH_SETUP],
4111                              nl80211_mesh_setup_params_policy))
4112                 return -EINVAL;
4113
4114         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
4115                 setup->sync_method =
4116                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
4117                  IEEE80211_SYNC_METHOD_VENDOR :
4118                  IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
4119
4120         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
4121                 setup->path_sel_proto =
4122                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
4123                  IEEE80211_PATH_PROTOCOL_VENDOR :
4124                  IEEE80211_PATH_PROTOCOL_HWMP;
4125
4126         if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
4127                 setup->path_metric =
4128                 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
4129                  IEEE80211_PATH_METRIC_VENDOR :
4130                  IEEE80211_PATH_METRIC_AIRTIME;
4131
4132
4133         if (tb[NL80211_MESH_SETUP_IE]) {
4134                 struct nlattr *ieattr =
4135                         tb[NL80211_MESH_SETUP_IE];
4136                 if (!is_valid_ie_attr(ieattr))
4137                         return -EINVAL;
4138                 setup->ie = nla_data(ieattr);
4139                 setup->ie_len = nla_len(ieattr);
4140         }
4141         setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
4142         setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
4143
4144         return 0;
4145 }
4146
4147 static int nl80211_update_mesh_config(struct sk_buff *skb,
4148                                       struct genl_info *info)
4149 {
4150         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4151         struct net_device *dev = info->user_ptr[1];
4152         struct wireless_dev *wdev = dev->ieee80211_ptr;
4153         struct mesh_config cfg;
4154         u32 mask;
4155         int err;
4156
4157         if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
4158                 return -EOPNOTSUPP;
4159
4160         if (!rdev->ops->update_mesh_config)
4161                 return -EOPNOTSUPP;
4162
4163         err = nl80211_parse_mesh_config(info, &cfg, &mask);
4164         if (err)
4165                 return err;
4166
4167         wdev_lock(wdev);
4168         if (!wdev->mesh_id_len)
4169                 err = -ENOLINK;
4170
4171         if (!err)
4172                 err = rdev_update_mesh_config(rdev, dev, mask, &cfg);
4173
4174         wdev_unlock(wdev);
4175
4176         return err;
4177 }
4178
4179 static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
4180 {
4181         struct sk_buff *msg;
4182         void *hdr = NULL;
4183         struct nlattr *nl_reg_rules;
4184         unsigned int i;
4185         int err = -EINVAL;
4186
4187         mutex_lock(&cfg80211_mutex);
4188
4189         if (!cfg80211_regdomain)
4190                 goto out;
4191
4192         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
4193         if (!msg) {
4194                 err = -ENOBUFS;
4195                 goto out;
4196         }
4197
4198         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
4199                              NL80211_CMD_GET_REG);
4200         if (!hdr)
4201                 goto put_failure;
4202
4203         if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
4204                            cfg80211_regdomain->alpha2) ||
4205             (cfg80211_regdomain->dfs_region &&
4206              nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
4207                         cfg80211_regdomain->dfs_region)))
4208                 goto nla_put_failure;
4209
4210         if (reg_last_request_cell_base() &&
4211             nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
4212                         NL80211_USER_REG_HINT_CELL_BASE))
4213                 goto nla_put_failure;
4214
4215         nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
4216         if (!nl_reg_rules)
4217                 goto nla_put_failure;
4218
4219         for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
4220                 struct nlattr *nl_reg_rule;
4221                 const struct ieee80211_reg_rule *reg_rule;
4222                 const struct ieee80211_freq_range *freq_range;
4223                 const struct ieee80211_power_rule *power_rule;
4224
4225                 reg_rule = &cfg80211_regdomain->reg_rules[i];
4226                 freq_range = &reg_rule->freq_range;
4227                 power_rule = &reg_rule->power_rule;
4228
4229                 nl_reg_rule = nla_nest_start(msg, i);
4230                 if (!nl_reg_rule)
4231                         goto nla_put_failure;
4232
4233                 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
4234                                 reg_rule->flags) ||
4235                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
4236                                 freq_range->start_freq_khz) ||
4237                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
4238                                 freq_range->end_freq_khz) ||
4239                     nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
4240                                 freq_range->max_bandwidth_khz) ||
4241                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
4242                                 power_rule->max_antenna_gain) ||
4243                     nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
4244                                 power_rule->max_eirp))
4245                         goto nla_put_failure;
4246
4247                 nla_nest_end(msg, nl_reg_rule);
4248         }
4249
4250         nla_nest_end(msg, nl_reg_rules);
4251
4252         genlmsg_end(msg, hdr);
4253         err = genlmsg_reply(msg, info);
4254         goto out;
4255
4256 nla_put_failure:
4257         genlmsg_cancel(msg, hdr);
4258 put_failure:
4259         nlmsg_free(msg);
4260         err = -EMSGSIZE;
4261 out:
4262         mutex_unlock(&cfg80211_mutex);
4263         return err;
4264 }
4265
4266 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
4267 {
4268         struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
4269         struct nlattr *nl_reg_rule;
4270         char *alpha2 = NULL;
4271         int rem_reg_rules = 0, r = 0;
4272         u32 num_rules = 0, rule_idx = 0, size_of_regd;
4273         u8 dfs_region = 0;
4274         struct ieee80211_regdomain *rd = NULL;
4275
4276         if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
4277                 return -EINVAL;
4278
4279         if (!info->attrs[NL80211_ATTR_REG_RULES])
4280                 return -EINVAL;
4281
4282         alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
4283
4284         if (info->attrs[NL80211_ATTR_DFS_REGION])
4285                 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
4286
4287         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4288                         rem_reg_rules) {
4289                 num_rules++;
4290                 if (num_rules > NL80211_MAX_SUPP_REG_RULES)
4291                         return -EINVAL;
4292         }
4293
4294         mutex_lock(&cfg80211_mutex);
4295
4296         if (!reg_is_valid_request(alpha2)) {
4297                 r = -EINVAL;
4298                 goto bad_reg;
4299         }
4300
4301         size_of_regd = sizeof(struct ieee80211_regdomain) +
4302                 (num_rules * sizeof(struct ieee80211_reg_rule));
4303
4304         rd = kzalloc(size_of_regd, GFP_KERNEL);
4305         if (!rd) {
4306                 r = -ENOMEM;
4307                 goto bad_reg;
4308         }
4309
4310         rd->n_reg_rules = num_rules;
4311         rd->alpha2[0] = alpha2[0];
4312         rd->alpha2[1] = alpha2[1];
4313
4314         /*
4315          * Disable DFS master mode if the DFS region was
4316          * not supported or known on this kernel.
4317          */
4318         if (reg_supported_dfs_region(dfs_region))
4319                 rd->dfs_region = dfs_region;
4320
4321         nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
4322                         rem_reg_rules) {
4323                 nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
4324                         nla_data(nl_reg_rule), nla_len(nl_reg_rule),
4325                         reg_rule_policy);
4326                 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
4327                 if (r)
4328                         goto bad_reg;
4329
4330                 rule_idx++;
4331
4332                 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
4333                         r = -EINVAL;
4334                         goto bad_reg;
4335                 }
4336         }
4337
4338         BUG_ON(rule_idx != num_rules);
4339
4340         r = set_regdom(rd);
4341
4342         mutex_unlock(&cfg80211_mutex);
4343
4344         return r;
4345
4346  bad_reg:
4347         mutex_unlock(&cfg80211_mutex);
4348         kfree(rd);
4349         return r;
4350 }
4351
4352 static int validate_scan_freqs(struct nlattr *freqs)
4353 {
4354         struct nlattr *attr1, *attr2;
4355         int n_channels = 0, tmp1, tmp2;
4356
4357         nla_for_each_nested(attr1, freqs, tmp1) {
4358                 n_channels++;
4359                 /*
4360                  * Some hardware has a limited channel list for
4361                  * scanning, and it is pretty much nonsensical
4362                  * to scan for a channel twice, so disallow that
4363                  * and don't require drivers to check that the
4364                  * channel list they get isn't longer than what
4365                  * they can scan, as long as they can scan all
4366                  * the channels they registered at once.
4367                  */
4368                 nla_for_each_nested(attr2, freqs, tmp2)
4369                         if (attr1 != attr2 &&
4370                             nla_get_u32(attr1) == nla_get_u32(attr2))
4371                                 return 0;
4372         }
4373
4374         return n_channels;
4375 }
4376
4377 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
4378 {
4379         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4380         struct wireless_dev *wdev = info->user_ptr[1];
4381         struct cfg80211_scan_request *request;
4382         struct nlattr *attr;
4383         struct wiphy *wiphy;
4384         int err, tmp, n_ssids = 0, n_channels, i;
4385         size_t ie_len;
4386
4387         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4388                 return -EINVAL;
4389
4390         wiphy = &rdev->wiphy;
4391
4392         if (!rdev->ops->scan)
4393                 return -EOPNOTSUPP;
4394
4395         if (rdev->scan_req)
4396                 return -EBUSY;
4397
4398         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4399                 n_channels = validate_scan_freqs(
4400                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4401                 if (!n_channels)
4402                         return -EINVAL;
4403         } else {
4404                 enum ieee80211_band band;
4405                 n_channels = 0;
4406
4407                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4408                         if (wiphy->bands[band])
4409                                 n_channels += wiphy->bands[band]->n_channels;
4410         }
4411
4412         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4413                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
4414                         n_ssids++;
4415
4416         if (n_ssids > wiphy->max_scan_ssids)
4417                 return -EINVAL;
4418
4419         if (info->attrs[NL80211_ATTR_IE])
4420                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4421         else
4422                 ie_len = 0;
4423
4424         if (ie_len > wiphy->max_scan_ie_len)
4425                 return -EINVAL;
4426
4427         request = kzalloc(sizeof(*request)
4428                         + sizeof(*request->ssids) * n_ssids
4429                         + sizeof(*request->channels) * n_channels
4430                         + ie_len, GFP_KERNEL);
4431         if (!request)
4432                 return -ENOMEM;
4433
4434         if (n_ssids)
4435                 request->ssids = (void *)&request->channels[n_channels];
4436         request->n_ssids = n_ssids;
4437         if (ie_len) {
4438                 if (request->ssids)
4439                         request->ie = (void *)(request->ssids + n_ssids);
4440                 else
4441                         request->ie = (void *)(request->channels + n_channels);
4442         }
4443
4444         i = 0;
4445         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4446                 /* user specified, bail out if channel not found */
4447                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
4448                         struct ieee80211_channel *chan;
4449
4450                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4451
4452                         if (!chan) {
4453                                 err = -EINVAL;
4454                                 goto out_free;
4455                         }
4456
4457                         /* ignore disabled channels */
4458                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4459                                 continue;
4460
4461                         request->channels[i] = chan;
4462                         i++;
4463                 }
4464         } else {
4465                 enum ieee80211_band band;
4466
4467                 /* all channels */
4468                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4469                         int j;
4470                         if (!wiphy->bands[band])
4471                                 continue;
4472                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4473                                 struct ieee80211_channel *chan;
4474
4475                                 chan = &wiphy->bands[band]->channels[j];
4476
4477                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4478                                         continue;
4479
4480                                 request->channels[i] = chan;
4481                                 i++;
4482                         }
4483                 }
4484         }
4485
4486         if (!i) {
4487                 err = -EINVAL;
4488                 goto out_free;
4489         }
4490
4491         request->n_channels = i;
4492
4493         i = 0;
4494         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4495                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
4496                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4497                                 err = -EINVAL;
4498                                 goto out_free;
4499                         }
4500                         request->ssids[i].ssid_len = nla_len(attr);
4501                         memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
4502                         i++;
4503                 }
4504         }
4505
4506         if (info->attrs[NL80211_ATTR_IE]) {
4507                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4508                 memcpy((void *)request->ie,
4509                        nla_data(info->attrs[NL80211_ATTR_IE]),
4510                        request->ie_len);
4511         }
4512
4513         for (i = 0; i < IEEE80211_NUM_BANDS; i++)
4514                 if (wiphy->bands[i])
4515                         request->rates[i] =
4516                                 (1 << wiphy->bands[i]->n_bitrates) - 1;
4517
4518         if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
4519                 nla_for_each_nested(attr,
4520                                     info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
4521                                     tmp) {
4522                         enum ieee80211_band band = nla_type(attr);
4523
4524                         if (band < 0 || band >= IEEE80211_NUM_BANDS) {
4525                                 err = -EINVAL;
4526                                 goto out_free;
4527                         }
4528                         err = ieee80211_get_ratemask(wiphy->bands[band],
4529                                                      nla_data(attr),
4530                                                      nla_len(attr),
4531                                                      &request->rates[band]);
4532                         if (err)
4533                                 goto out_free;
4534                 }
4535         }
4536
4537         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4538                 request->flags = nla_get_u32(
4539                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4540                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4541                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4542                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4543                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4544                         err = -EOPNOTSUPP;
4545                         goto out_free;
4546                 }
4547         }
4548
4549         request->no_cck =
4550                 nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
4551
4552         request->wdev = wdev;
4553         request->wiphy = &rdev->wiphy;
4554         request->scan_start = jiffies;
4555
4556         rdev->scan_req = request;
4557         err = rdev_scan(rdev, request);
4558
4559         if (!err) {
4560                 nl80211_send_scan_start(rdev, wdev);
4561                 if (wdev->netdev)
4562                         dev_hold(wdev->netdev);
4563         } else {
4564  out_free:
4565                 rdev->scan_req = NULL;
4566                 kfree(request);
4567         }
4568
4569         return err;
4570 }
4571
4572 static int nl80211_start_sched_scan(struct sk_buff *skb,
4573                                     struct genl_info *info)
4574 {
4575         struct cfg80211_sched_scan_request *request;
4576         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4577         struct net_device *dev = info->user_ptr[1];
4578         struct nlattr *attr;
4579         struct wiphy *wiphy;
4580         int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
4581         u32 interval;
4582         enum ieee80211_band band;
4583         size_t ie_len;
4584         struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
4585
4586         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4587             !rdev->ops->sched_scan_start)
4588                 return -EOPNOTSUPP;
4589
4590         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
4591                 return -EINVAL;
4592
4593         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
4594                 return -EINVAL;
4595
4596         interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
4597         if (interval == 0)
4598                 return -EINVAL;
4599
4600         wiphy = &rdev->wiphy;
4601
4602         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4603                 n_channels = validate_scan_freqs(
4604                                 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
4605                 if (!n_channels)
4606                         return -EINVAL;
4607         } else {
4608                 n_channels = 0;
4609
4610                 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
4611                         if (wiphy->bands[band])
4612                                 n_channels += wiphy->bands[band]->n_channels;
4613         }
4614
4615         if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
4616                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4617                                     tmp)
4618                         n_ssids++;
4619
4620         if (n_ssids > wiphy->max_sched_scan_ssids)
4621                 return -EINVAL;
4622
4623         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
4624                 nla_for_each_nested(attr,
4625                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4626                                     tmp)
4627                         n_match_sets++;
4628
4629         if (n_match_sets > wiphy->max_match_sets)
4630                 return -EINVAL;
4631
4632         if (info->attrs[NL80211_ATTR_IE])
4633                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4634         else
4635                 ie_len = 0;
4636
4637         if (ie_len > wiphy->max_sched_scan_ie_len)
4638                 return -EINVAL;
4639
4640         mutex_lock(&rdev->sched_scan_mtx);
4641
4642         if (rdev->sched_scan_req) {
4643                 err = -EINPROGRESS;
4644                 goto out;
4645         }
4646
4647         request = kzalloc(sizeof(*request)
4648                         + sizeof(*request->ssids) * n_ssids
4649                         + sizeof(*request->match_sets) * n_match_sets
4650                         + sizeof(*request->channels) * n_channels
4651                         + ie_len, GFP_KERNEL);
4652         if (!request) {
4653                 err = -ENOMEM;
4654                 goto out;
4655         }
4656
4657         if (n_ssids)
4658                 request->ssids = (void *)&request->channels[n_channels];
4659         request->n_ssids = n_ssids;
4660         if (ie_len) {
4661                 if (request->ssids)
4662                         request->ie = (void *)(request->ssids + n_ssids);
4663                 else
4664                         request->ie = (void *)(request->channels + n_channels);
4665         }
4666
4667         if (n_match_sets) {
4668                 if (request->ie)
4669                         request->match_sets = (void *)(request->ie + ie_len);
4670                 else if (request->ssids)
4671                         request->match_sets =
4672                                 (void *)(request->ssids + n_ssids);
4673                 else
4674                         request->match_sets =
4675                                 (void *)(request->channels + n_channels);
4676         }
4677         request->n_match_sets = n_match_sets;
4678
4679         i = 0;
4680         if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
4681                 /* user specified, bail out if channel not found */
4682                 nla_for_each_nested(attr,
4683                                     info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
4684                                     tmp) {
4685                         struct ieee80211_channel *chan;
4686
4687                         chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
4688
4689                         if (!chan) {
4690                                 err = -EINVAL;
4691                                 goto out_free;
4692                         }
4693
4694                         /* ignore disabled channels */
4695                         if (chan->flags & IEEE80211_CHAN_DISABLED)
4696                                 continue;
4697
4698                         request->channels[i] = chan;
4699                         i++;
4700                 }
4701         } else {
4702                 /* all channels */
4703                 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
4704                         int j;
4705                         if (!wiphy->bands[band])
4706                                 continue;
4707                         for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
4708                                 struct ieee80211_channel *chan;
4709
4710                                 chan = &wiphy->bands[band]->channels[j];
4711
4712                                 if (chan->flags & IEEE80211_CHAN_DISABLED)
4713                                         continue;
4714
4715                                 request->channels[i] = chan;
4716                                 i++;
4717                         }
4718                 }
4719         }
4720
4721         if (!i) {
4722                 err = -EINVAL;
4723                 goto out_free;
4724         }
4725
4726         request->n_channels = i;
4727
4728         i = 0;
4729         if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
4730                 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
4731                                     tmp) {
4732                         if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
4733                                 err = -EINVAL;
4734                                 goto out_free;
4735                         }
4736                         request->ssids[i].ssid_len = nla_len(attr);
4737                         memcpy(request->ssids[i].ssid, nla_data(attr),
4738                                nla_len(attr));
4739                         i++;
4740                 }
4741         }
4742
4743         i = 0;
4744         if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
4745                 nla_for_each_nested(attr,
4746                                     info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
4747                                     tmp) {
4748                         struct nlattr *ssid, *rssi;
4749
4750                         nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
4751                                   nla_data(attr), nla_len(attr),
4752                                   nl80211_match_policy);
4753                         ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
4754                         if (ssid) {
4755                                 if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
4756                                         err = -EINVAL;
4757                                         goto out_free;
4758                                 }
4759                                 memcpy(request->match_sets[i].ssid.ssid,
4760                                        nla_data(ssid), nla_len(ssid));
4761                                 request->match_sets[i].ssid.ssid_len =
4762                                         nla_len(ssid);
4763                         }
4764                         rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
4765                         if (rssi)
4766                                 request->rssi_thold = nla_get_u32(rssi);
4767                         else
4768                                 request->rssi_thold =
4769                                                    NL80211_SCAN_RSSI_THOLD_OFF;
4770                         i++;
4771                 }
4772         }
4773
4774         if (info->attrs[NL80211_ATTR_IE]) {
4775                 request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
4776                 memcpy((void *)request->ie,
4777                        nla_data(info->attrs[NL80211_ATTR_IE]),
4778                        request->ie_len);
4779         }
4780
4781         if (info->attrs[NL80211_ATTR_SCAN_FLAGS]) {
4782                 request->flags = nla_get_u32(
4783                         info->attrs[NL80211_ATTR_SCAN_FLAGS]);
4784                 if (((request->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
4785                      !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
4786                     ((request->flags & NL80211_SCAN_FLAG_FLUSH) &&
4787                      !(wiphy->features & NL80211_FEATURE_SCAN_FLUSH))) {
4788                         err = -EOPNOTSUPP;
4789                         goto out_free;
4790                 }
4791         }
4792
4793         request->dev = dev;
4794         request->wiphy = &rdev->wiphy;
4795         request->interval = interval;
4796         request->scan_start = jiffies;
4797
4798         err = rdev_sched_scan_start(rdev, dev, request);
4799         if (!err) {
4800                 rdev->sched_scan_req = request;
4801                 nl80211_send_sched_scan(rdev, dev,
4802                                         NL80211_CMD_START_SCHED_SCAN);
4803                 goto out;
4804         }
4805
4806 out_free:
4807         kfree(request);
4808 out:
4809         mutex_unlock(&rdev->sched_scan_mtx);
4810         return err;
4811 }
4812
4813 static int nl80211_stop_sched_scan(struct sk_buff *skb,
4814                                    struct genl_info *info)
4815 {
4816         struct cfg80211_registered_device *rdev = info->user_ptr[0];
4817         int err;
4818
4819         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
4820             !rdev->ops->sched_scan_stop)
4821                 return -EOPNOTSUPP;
4822
4823         mutex_lock(&rdev->sched_scan_mtx);
4824         err = __cfg80211_stop_sched_scan(rdev, false);
4825         mutex_unlock(&rdev->sched_scan_mtx);
4826
4827         return err;
4828 }
4829
4830 static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
4831                             u32 seq, int flags,
4832                             struct cfg80211_registered_device *rdev,
4833                             struct wireless_dev *wdev,
4834                             struct cfg80211_internal_bss *intbss)
4835 {
4836         struct cfg80211_bss *res = &intbss->pub;
4837         void *hdr;
4838         struct nlattr *bss;
4839
4840         ASSERT_WDEV_LOCK(wdev);
4841
4842         hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
4843                              NL80211_CMD_NEW_SCAN_RESULTS);
4844         if (!hdr)
4845                 return -1;
4846
4847         genl_dump_check_consistent(cb, hdr, &nl80211_fam);
4848
4849         if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
4850             nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
4851                 goto nla_put_failure;
4852
4853         bss = nla_nest_start(msg, NL80211_ATTR_BSS);
4854         if (!bss)
4855                 goto nla_put_failure;
4856         if ((!is_zero_ether_addr(res->bssid) &&
4857              nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
4858             (res->information_elements && res->len_information_elements &&
4859              nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
4860                      res->len_information_elements,
4861                      res->information_elements)) ||
4862             (res->beacon_ies && res->len_beacon_ies &&
4863              res->beacon_ies != res->information_elements &&
4864              nla_put(msg, NL80211_BSS_BEACON_IES,
4865                      res->len_beacon_ies, res->beacon_ies)))
4866                 goto nla_put_failure;
4867         if (res->tsf &&
4868             nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
4869                 goto nla_put_failure;
4870         if (res->beacon_interval &&
4871             nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
4872                 goto nla_put_failure;
4873         if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
4874             nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
4875             nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
4876                         jiffies_to_msecs(jiffies - intbss->ts)))
4877                 goto nla_put_failure;
4878
4879         switch (rdev->wiphy.signal_type) {
4880         case CFG80211_SIGNAL_TYPE_MBM:
4881                 if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
4882                         goto nla_put_failure;
4883                 break;
4884         case CFG80211_SIGNAL_TYPE_UNSPEC:
4885                 if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
4886                         goto nla_put_failure;
4887                 break;
4888         default:
4889                 break;
4890         }
4891
4892         switch (wdev->iftype) {
4893         case NL80211_IFTYPE_P2P_CLIENT:
4894         case NL80211_IFTYPE_STATION:
4895                 if (intbss == wdev->current_bss &&
4896                     nla_put_u32(msg, NL80211_BSS_STATUS,
4897                                 NL80211_BSS_STATUS_ASSOCIATED))
4898                         goto nla_put_failure;
4899                 break;
4900         case NL80211_IFTYPE_ADHOC:
4901                 if (intbss == wdev->current_bss &&
4902                     nla_put_u32(msg, NL80211_BSS_STATUS,
4903                                 NL80211_BSS_STATUS_IBSS_JOINED))
4904                         goto nla_put_failure;
4905                 break;
4906         default:
4907                 break;
4908         }
4909
4910         nla_nest_end(msg, bss);
4911
4912         return genlmsg_end(msg, hdr);
4913
4914  nla_put_failure:
4915         genlmsg_cancel(msg, hdr);
4916         return -EMSGSIZE;
4917 }
4918
4919 static int nl80211_dump_scan(struct sk_buff *skb,
4920                              struct netlink_callback *cb)
4921 {
4922         struct cfg80211_registered_device *rdev;
4923         struct net_device *dev;
4924         struct cfg80211_internal_bss *scan;
4925         struct wireless_dev *wdev;
4926         int start = cb->args[1], idx = 0;
4927         int err;
4928
4929         err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
4930         if (err)
4931                 return err;
4932
4933         wdev = dev->ieee80211_ptr;
4934
4935         wdev_lock(wdev);
4936         spin_lock_bh(&rdev->bss_lock);
4937         cfg80211_bss_expire(rdev);
4938
4939         cb->seq = rdev->bss_generation;
4940
4941         list_for_each_entry(scan, &rdev->bss_list, list) {
4942                 if (++idx <= start)
4943                         continue;
4944                 if (nl80211_send_bss(skb, cb,
4945                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
4946                                 rdev, wdev, scan) < 0) {
4947                         idx--;
4948                         break;
4949                 }
4950         }
4951
4952         spin_unlock_bh(&rdev->bss_lock);
4953         wdev_unlock(wdev);
4954
4955         cb->args[1] = idx;
4956         nl80211_finish_netdev_dump(rdev);
4957
4958         return skb->len;
4959 }
4960
4961 static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
4962                                 int flags, struct net_device *dev,
4963                                 struct survey_info *survey)
4964 {
4965         void *hdr;
4966         struct nlattr *infoattr;
4967
4968         hdr = nl80211hdr_put(msg, portid, seq, flags,
4969                              NL80211_CMD_NEW_SURVEY_RESULTS);
4970         if (!hdr)
4971                 return -ENOMEM;
4972
4973         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
4974                 goto nla_put_failure;
4975
4976         infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
4977         if (!infoattr)
4978                 goto nla_put_failure;
4979
4980         if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
4981                         survey->channel->center_freq))
4982                 goto nla_put_failure;
4983
4984         if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
4985             nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
4986                 goto nla_put_failure;
4987         if ((survey->filled & SURVEY_INFO_IN_USE) &&
4988             nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
4989                 goto nla_put_failure;
4990         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
4991             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
4992                         survey->channel_time))
4993                 goto nla_put_failure;
4994         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
4995             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
4996                         survey->channel_time_busy))
4997                 goto nla_put_failure;
4998         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
4999             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
5000                         survey->channel_time_ext_busy))
5001                 goto nla_put_failure;
5002         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
5003             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
5004                         survey->channel_time_rx))
5005                 goto nla_put_failure;
5006         if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
5007             nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
5008                         survey->channel_time_tx))
5009                 goto nla_put_failure;
5010
5011         nla_nest_end(msg, infoattr);
5012
5013         return genlmsg_end(msg, hdr);
5014
5015  nla_put_failure:
5016         genlmsg_cancel(msg, hdr);
5017         return -EMSGSIZE;
5018 }
5019
5020 static int nl80211_dump_survey(struct sk_buff *skb,
5021                         struct netlink_callback *cb)
5022 {
5023         struct survey_info survey;
5024         struct cfg80211_registered_device *dev;
5025         struct net_device *netdev;
5026         int survey_idx = cb->args[1];
5027         int res;
5028
5029         res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
5030         if (res)
5031                 return res;
5032
5033         if (!dev->ops->dump_survey) {
5034                 res = -EOPNOTSUPP;
5035                 goto out_err;
5036         }
5037
5038         while (1) {
5039                 struct ieee80211_channel *chan;
5040
5041                 res = rdev_dump_survey(dev, netdev, survey_idx, &survey);
5042                 if (res == -ENOENT)
5043                         break;
5044                 if (res)
5045                         goto out_err;
5046
5047                 /* Survey without a channel doesn't make sense */
5048                 if (!survey.channel) {
5049                         res = -EINVAL;
5050                         goto out;
5051                 }
5052
5053                 chan = ieee80211_get_channel(&dev->wiphy,
5054                                              survey.channel->center_freq);
5055                 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
5056                         survey_idx++;
5057                         continue;
5058                 }
5059
5060                 if (nl80211_send_survey(skb,
5061                                 NETLINK_CB(cb->skb).portid,
5062                                 cb->nlh->nlmsg_seq, NLM_F_MULTI,
5063                                 netdev,
5064                                 &survey) < 0)
5065                         goto out;
5066                 survey_idx++;
5067         }
5068
5069  out:
5070         cb->args[1] = survey_idx;
5071         res = skb->len;
5072  out_err:
5073         nl80211_finish_netdev_dump(dev);
5074         return res;
5075 }
5076
5077 static bool nl80211_valid_wpa_versions(u32 wpa_versions)
5078 {
5079         return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
5080                                   NL80211_WPA_VERSION_2));
5081 }
5082
5083 static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
5084 {
5085         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5086         struct net_device *dev = info->user_ptr[1];
5087         struct ieee80211_channel *chan;
5088         const u8 *bssid, *ssid, *ie = NULL, *sae_data = NULL;
5089         int err, ssid_len, ie_len = 0, sae_data_len = 0;
5090         enum nl80211_auth_type auth_type;
5091         struct key_parse key;
5092         bool local_state_change;
5093
5094         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5095                 return -EINVAL;
5096
5097         if (!info->attrs[NL80211_ATTR_MAC])
5098                 return -EINVAL;
5099
5100         if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
5101                 return -EINVAL;
5102
5103         if (!info->attrs[NL80211_ATTR_SSID])
5104                 return -EINVAL;
5105
5106         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
5107                 return -EINVAL;
5108
5109         err = nl80211_parse_key(info, &key);
5110         if (err)
5111                 return err;
5112
5113         if (key.idx >= 0) {
5114                 if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
5115                         return -EINVAL;
5116                 if (!key.p.key || !key.p.key_len)
5117                         return -EINVAL;
5118                 if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
5119                      key.p.key_len != WLAN_KEY_LEN_WEP40) &&
5120                     (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
5121                      key.p.key_len != WLAN_KEY_LEN_WEP104))
5122                         return -EINVAL;
5123                 if (key.idx > 4)
5124                         return -EINVAL;
5125         } else {
5126                 key.p.key_len = 0;
5127                 key.p.key = NULL;
5128         }
5129
5130         if (key.idx >= 0) {
5131                 int i;
5132                 bool ok = false;
5133                 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
5134                         if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
5135                                 ok = true;
5136                                 break;
5137                         }
5138                 }
5139                 if (!ok)
5140                         return -EINVAL;
5141         }
5142
5143         if (!rdev->ops->auth)
5144                 return -EOPNOTSUPP;
5145
5146         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5147             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5148                 return -EOPNOTSUPP;
5149
5150         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5151         chan = ieee80211_get_channel(&rdev->wiphy,
5152                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5153         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5154                 return -EINVAL;
5155
5156         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5157         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5158
5159         if (info->attrs[NL80211_ATTR_IE]) {
5160                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5161                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5162         }
5163
5164         auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5165         if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
5166                 return -EINVAL;
5167
5168         if (auth_type == NL80211_AUTHTYPE_SAE &&
5169             !info->attrs[NL80211_ATTR_SAE_DATA])
5170                 return -EINVAL;
5171
5172         if (info->attrs[NL80211_ATTR_SAE_DATA]) {
5173                 if (auth_type != NL80211_AUTHTYPE_SAE)
5174                         return -EINVAL;
5175                 sae_data = nla_data(info->attrs[NL80211_ATTR_SAE_DATA]);
5176                 sae_data_len = nla_len(info->attrs[NL80211_ATTR_SAE_DATA]);
5177                 /* need to include at least Auth Transaction and Status Code */
5178                 if (sae_data_len < 4)
5179                         return -EINVAL;
5180         }
5181
5182         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5183
5184         /*
5185          * Since we no longer track auth state, ignore
5186          * requests to only change local state.
5187          */
5188         if (local_state_change)
5189                 return 0;
5190
5191         return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
5192                                   ssid, ssid_len, ie, ie_len,
5193                                   key.p.key, key.p.key_len, key.idx,
5194                                   sae_data, sae_data_len);
5195 }
5196
5197 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
5198                                    struct genl_info *info,
5199                                    struct cfg80211_crypto_settings *settings,
5200                                    int cipher_limit)
5201 {
5202         memset(settings, 0, sizeof(*settings));
5203
5204         settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
5205
5206         if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
5207                 u16 proto;
5208                 proto = nla_get_u16(
5209                         info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
5210                 settings->control_port_ethertype = cpu_to_be16(proto);
5211                 if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
5212                     proto != ETH_P_PAE)
5213                         return -EINVAL;
5214                 if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
5215                         settings->control_port_no_encrypt = true;
5216         } else
5217                 settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
5218
5219         if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
5220                 void *data;
5221                 int len, i;
5222
5223                 data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5224                 len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
5225                 settings->n_ciphers_pairwise = len / sizeof(u32);
5226
5227                 if (len % sizeof(u32))
5228                         return -EINVAL;
5229
5230                 if (settings->n_ciphers_pairwise > cipher_limit)
5231                         return -EINVAL;
5232
5233                 memcpy(settings->ciphers_pairwise, data, len);
5234
5235                 for (i = 0; i < settings->n_ciphers_pairwise; i++)
5236                         if (!cfg80211_supported_cipher_suite(
5237                                         &rdev->wiphy,
5238                                         settings->ciphers_pairwise[i]))
5239                                 return -EINVAL;
5240         }
5241
5242         if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
5243                 settings->cipher_group =
5244                         nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
5245                 if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
5246                                                      settings->cipher_group))
5247                         return -EINVAL;
5248         }
5249
5250         if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
5251                 settings->wpa_versions =
5252                         nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
5253                 if (!nl80211_valid_wpa_versions(settings->wpa_versions))
5254                         return -EINVAL;
5255         }
5256
5257         if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
5258                 void *data;
5259                 int len;
5260
5261                 data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
5262                 len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
5263                 settings->n_akm_suites = len / sizeof(u32);
5264
5265                 if (len % sizeof(u32))
5266                         return -EINVAL;
5267
5268                 if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
5269                         return -EINVAL;
5270
5271                 memcpy(settings->akm_suites, data, len);
5272         }
5273
5274         return 0;
5275 }
5276
5277 static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
5278 {
5279         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5280         struct net_device *dev = info->user_ptr[1];
5281         struct cfg80211_crypto_settings crypto;
5282         struct ieee80211_channel *chan;
5283         const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
5284         int err, ssid_len, ie_len = 0;
5285         bool use_mfp = false;
5286         u32 flags = 0;
5287         struct ieee80211_ht_cap *ht_capa = NULL;
5288         struct ieee80211_ht_cap *ht_capa_mask = NULL;
5289
5290         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5291                 return -EINVAL;
5292
5293         if (!info->attrs[NL80211_ATTR_MAC] ||
5294             !info->attrs[NL80211_ATTR_SSID] ||
5295             !info->attrs[NL80211_ATTR_WIPHY_FREQ])
5296                 return -EINVAL;
5297
5298         if (!rdev->ops->assoc)
5299                 return -EOPNOTSUPP;
5300
5301         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5302             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5303                 return -EOPNOTSUPP;
5304
5305         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5306
5307         chan = ieee80211_get_channel(&rdev->wiphy,
5308                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5309         if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
5310                 return -EINVAL;
5311
5312         ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5313         ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5314
5315         if (info->attrs[NL80211_ATTR_IE]) {
5316                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5317                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5318         }
5319
5320         if (info->attrs[NL80211_ATTR_USE_MFP]) {
5321                 enum nl80211_mfp mfp =
5322                         nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
5323                 if (mfp == NL80211_MFP_REQUIRED)
5324                         use_mfp = true;
5325                 else if (mfp != NL80211_MFP_NO)
5326                         return -EINVAL;
5327         }
5328
5329         if (info->attrs[NL80211_ATTR_PREV_BSSID])
5330                 prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
5331
5332         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5333                 flags |= ASSOC_REQ_DISABLE_HT;
5334
5335         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5336                 ht_capa_mask =
5337                         nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
5338
5339         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5340                 if (!ht_capa_mask)
5341                         return -EINVAL;
5342                 ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
5343         }
5344
5345         err = nl80211_crypto_settings(rdev, info, &crypto, 1);
5346         if (!err)
5347                 err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
5348                                           ssid, ssid_len, ie, ie_len, use_mfp,
5349                                           &crypto, flags, ht_capa,
5350                                           ht_capa_mask);
5351
5352         return err;
5353 }
5354
5355 static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
5356 {
5357         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5358         struct net_device *dev = info->user_ptr[1];
5359         const u8 *ie = NULL, *bssid;
5360         int ie_len = 0;
5361         u16 reason_code;
5362         bool local_state_change;
5363
5364         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5365                 return -EINVAL;
5366
5367         if (!info->attrs[NL80211_ATTR_MAC])
5368                 return -EINVAL;
5369
5370         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5371                 return -EINVAL;
5372
5373         if (!rdev->ops->deauth)
5374                 return -EOPNOTSUPP;
5375
5376         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5377             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5378                 return -EOPNOTSUPP;
5379
5380         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5381
5382         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5383         if (reason_code == 0) {
5384                 /* Reason Code 0 is reserved */
5385                 return -EINVAL;
5386         }
5387
5388         if (info->attrs[NL80211_ATTR_IE]) {
5389                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5390                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5391         }
5392
5393         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5394
5395         return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
5396                                     local_state_change);
5397 }
5398
5399 static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
5400 {
5401         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5402         struct net_device *dev = info->user_ptr[1];
5403         const u8 *ie = NULL, *bssid;
5404         int ie_len = 0;
5405         u16 reason_code;
5406         bool local_state_change;
5407
5408         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5409                 return -EINVAL;
5410
5411         if (!info->attrs[NL80211_ATTR_MAC])
5412                 return -EINVAL;
5413
5414         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5415                 return -EINVAL;
5416
5417         if (!rdev->ops->disassoc)
5418                 return -EOPNOTSUPP;
5419
5420         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5421             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5422                 return -EOPNOTSUPP;
5423
5424         bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5425
5426         reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5427         if (reason_code == 0) {
5428                 /* Reason Code 0 is reserved */
5429                 return -EINVAL;
5430         }
5431
5432         if (info->attrs[NL80211_ATTR_IE]) {
5433                 ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5434                 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5435         }
5436
5437         local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
5438
5439         return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
5440                                       local_state_change);
5441 }
5442
5443 static bool
5444 nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
5445                          int mcast_rate[IEEE80211_NUM_BANDS],
5446                          int rateval)
5447 {
5448         struct wiphy *wiphy = &rdev->wiphy;
5449         bool found = false;
5450         int band, i;
5451
5452         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
5453                 struct ieee80211_supported_band *sband;
5454
5455                 sband = wiphy->bands[band];
5456                 if (!sband)
5457                         continue;
5458
5459                 for (i = 0; i < sband->n_bitrates; i++) {
5460                         if (sband->bitrates[i].bitrate == rateval) {
5461                                 mcast_rate[band] = i + 1;
5462                                 found = true;
5463                                 break;
5464                         }
5465                 }
5466         }
5467
5468         return found;
5469 }
5470
5471 static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
5472 {
5473         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5474         struct net_device *dev = info->user_ptr[1];
5475         struct cfg80211_ibss_params ibss;
5476         struct wiphy *wiphy;
5477         struct cfg80211_cached_keys *connkeys = NULL;
5478         int err;
5479
5480         memset(&ibss, 0, sizeof(ibss));
5481
5482         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5483                 return -EINVAL;
5484
5485         if (!info->attrs[NL80211_ATTR_SSID] ||
5486             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5487                 return -EINVAL;
5488
5489         ibss.beacon_interval = 100;
5490
5491         if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
5492                 ibss.beacon_interval =
5493                         nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
5494                 if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
5495                         return -EINVAL;
5496         }
5497
5498         if (!rdev->ops->join_ibss)
5499                 return -EOPNOTSUPP;
5500
5501         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5502                 return -EOPNOTSUPP;
5503
5504         wiphy = &rdev->wiphy;
5505
5506         if (info->attrs[NL80211_ATTR_MAC]) {
5507                 ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5508
5509                 if (!is_valid_ether_addr(ibss.bssid))
5510                         return -EINVAL;
5511         }
5512         ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5513         ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5514
5515         if (info->attrs[NL80211_ATTR_IE]) {
5516                 ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5517                 ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5518         }
5519
5520         err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
5521         if (err)
5522                 return err;
5523
5524         if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef))
5525                 return -EINVAL;
5526
5527         if (ibss.chandef.width > NL80211_CHAN_WIDTH_40)
5528                 return -EINVAL;
5529         if (ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
5530             !(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
5531
5532         ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
5533         ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
5534
5535         if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
5536                 u8 *rates =
5537                         nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5538                 int n_rates =
5539                         nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
5540                 struct ieee80211_supported_band *sband =
5541                         wiphy->bands[ibss.chandef.chan->band];
5542
5543                 err = ieee80211_get_ratemask(sband, rates, n_rates,
5544                                              &ibss.basic_rates);
5545                 if (err)
5546                         return err;
5547         }
5548
5549         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
5550             !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
5551                         nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
5552                 return -EINVAL;
5553
5554         if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5555                 bool no_ht = false;
5556
5557                 connkeys = nl80211_parse_connkeys(rdev,
5558                                           info->attrs[NL80211_ATTR_KEYS],
5559                                           &no_ht);
5560                 if (IS_ERR(connkeys))
5561                         return PTR_ERR(connkeys);
5562
5563                 if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
5564                     no_ht) {
5565                         kfree(connkeys);
5566                         return -EINVAL;
5567                 }
5568         }
5569
5570         ibss.control_port =
5571                 nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
5572
5573         err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
5574         if (err)
5575                 kfree(connkeys);
5576         return err;
5577 }
5578
5579 static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
5580 {
5581         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5582         struct net_device *dev = info->user_ptr[1];
5583
5584         if (!rdev->ops->leave_ibss)
5585                 return -EOPNOTSUPP;
5586
5587         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
5588                 return -EOPNOTSUPP;
5589
5590         return cfg80211_leave_ibss(rdev, dev, false);
5591 }
5592
5593 static int nl80211_set_mcast_rate(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         int mcast_rate[IEEE80211_NUM_BANDS];
5598         u32 nla_rate;
5599         int err;
5600
5601         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
5602             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
5603                 return -EOPNOTSUPP;
5604
5605         if (!rdev->ops->set_mcast_rate)
5606                 return -EOPNOTSUPP;
5607
5608         memset(mcast_rate, 0, sizeof(mcast_rate));
5609
5610         if (!info->attrs[NL80211_ATTR_MCAST_RATE])
5611                 return -EINVAL;
5612
5613         nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
5614         if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
5615                 return -EINVAL;
5616
5617         err = rdev->ops->set_mcast_rate(&rdev->wiphy, dev, mcast_rate);
5618
5619         return err;
5620 }
5621
5622
5623 #ifdef CONFIG_NL80211_TESTMODE
5624 static struct genl_multicast_group nl80211_testmode_mcgrp = {
5625         .name = "testmode",
5626 };
5627
5628 static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
5629 {
5630         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5631         int err;
5632
5633         if (!info->attrs[NL80211_ATTR_TESTDATA])
5634                 return -EINVAL;
5635
5636         err = -EOPNOTSUPP;
5637         if (rdev->ops->testmode_cmd) {
5638                 rdev->testmode_info = info;
5639                 err = rdev_testmode_cmd(rdev,
5640                                 nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
5641                                 nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
5642                 rdev->testmode_info = NULL;
5643         }
5644
5645         return err;
5646 }
5647
5648 static int nl80211_testmode_dump(struct sk_buff *skb,
5649                                  struct netlink_callback *cb)
5650 {
5651         struct cfg80211_registered_device *rdev;
5652         int err;
5653         long phy_idx;
5654         void *data = NULL;
5655         int data_len = 0;
5656
5657         if (cb->args[0]) {
5658                 /*
5659                  * 0 is a valid index, but not valid for args[0],
5660                  * so we need to offset by 1.
5661                  */
5662                 phy_idx = cb->args[0] - 1;
5663         } else {
5664                 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
5665                                   nl80211_fam.attrbuf, nl80211_fam.maxattr,
5666                                   nl80211_policy);
5667                 if (err)
5668                         return err;
5669
5670                 mutex_lock(&cfg80211_mutex);
5671                 rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk),
5672                                                   nl80211_fam.attrbuf);
5673                 if (IS_ERR(rdev)) {
5674                         mutex_unlock(&cfg80211_mutex);
5675                         return PTR_ERR(rdev);
5676                 }
5677                 phy_idx = rdev->wiphy_idx;
5678                 rdev = NULL;
5679                 mutex_unlock(&cfg80211_mutex);
5680
5681                 if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
5682                         cb->args[1] =
5683                                 (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
5684         }
5685
5686         if (cb->args[1]) {
5687                 data = nla_data((void *)cb->args[1]);
5688                 data_len = nla_len((void *)cb->args[1]);
5689         }
5690
5691         mutex_lock(&cfg80211_mutex);
5692         rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
5693         if (!rdev) {
5694                 mutex_unlock(&cfg80211_mutex);
5695                 return -ENOENT;
5696         }
5697         cfg80211_lock_rdev(rdev);
5698         mutex_unlock(&cfg80211_mutex);
5699
5700         if (!rdev->ops->testmode_dump) {
5701                 err = -EOPNOTSUPP;
5702                 goto out_err;
5703         }
5704
5705         while (1) {
5706                 void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
5707                                            cb->nlh->nlmsg_seq, NLM_F_MULTI,
5708                                            NL80211_CMD_TESTMODE);
5709                 struct nlattr *tmdata;
5710
5711                 if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
5712                         genlmsg_cancel(skb, hdr);
5713                         break;
5714                 }
5715
5716                 tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5717                 if (!tmdata) {
5718                         genlmsg_cancel(skb, hdr);
5719                         break;
5720                 }
5721                 err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
5722                 nla_nest_end(skb, tmdata);
5723
5724                 if (err == -ENOBUFS || err == -ENOENT) {
5725                         genlmsg_cancel(skb, hdr);
5726                         break;
5727                 } else if (err) {
5728                         genlmsg_cancel(skb, hdr);
5729                         goto out_err;
5730                 }
5731
5732                 genlmsg_end(skb, hdr);
5733         }
5734
5735         err = skb->len;
5736         /* see above */
5737         cb->args[0] = phy_idx + 1;
5738  out_err:
5739         cfg80211_unlock_rdev(rdev);
5740         return err;
5741 }
5742
5743 static struct sk_buff *
5744 __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
5745                               int approxlen, u32 portid, u32 seq, gfp_t gfp)
5746 {
5747         struct sk_buff *skb;
5748         void *hdr;
5749         struct nlattr *data;
5750
5751         skb = nlmsg_new(approxlen + 100, gfp);
5752         if (!skb)
5753                 return NULL;
5754
5755         hdr = nl80211hdr_put(skb, portid, seq, 0, NL80211_CMD_TESTMODE);
5756         if (!hdr) {
5757                 kfree_skb(skb);
5758                 return NULL;
5759         }
5760
5761         if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
5762                 goto nla_put_failure;
5763         data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
5764
5765         ((void **)skb->cb)[0] = rdev;
5766         ((void **)skb->cb)[1] = hdr;
5767         ((void **)skb->cb)[2] = data;
5768
5769         return skb;
5770
5771  nla_put_failure:
5772         kfree_skb(skb);
5773         return NULL;
5774 }
5775
5776 struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
5777                                                   int approxlen)
5778 {
5779         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5780
5781         if (WARN_ON(!rdev->testmode_info))
5782                 return NULL;
5783
5784         return __cfg80211_testmode_alloc_skb(rdev, approxlen,
5785                                 rdev->testmode_info->snd_portid,
5786                                 rdev->testmode_info->snd_seq,
5787                                 GFP_KERNEL);
5788 }
5789 EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
5790
5791 int cfg80211_testmode_reply(struct sk_buff *skb)
5792 {
5793         struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
5794         void *hdr = ((void **)skb->cb)[1];
5795         struct nlattr *data = ((void **)skb->cb)[2];
5796
5797         if (WARN_ON(!rdev->testmode_info)) {
5798                 kfree_skb(skb);
5799                 return -EINVAL;
5800         }
5801
5802         nla_nest_end(skb, data);
5803         genlmsg_end(skb, hdr);
5804         return genlmsg_reply(skb, rdev->testmode_info);
5805 }
5806 EXPORT_SYMBOL(cfg80211_testmode_reply);
5807
5808 struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
5809                                                   int approxlen, gfp_t gfp)
5810 {
5811         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
5812
5813         return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
5814 }
5815 EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
5816
5817 void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
5818 {
5819         void *hdr = ((void **)skb->cb)[1];
5820         struct nlattr *data = ((void **)skb->cb)[2];
5821
5822         nla_nest_end(skb, data);
5823         genlmsg_end(skb, hdr);
5824         genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
5825 }
5826 EXPORT_SYMBOL(cfg80211_testmode_event);
5827 #endif
5828
5829 static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
5830 {
5831         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5832         struct net_device *dev = info->user_ptr[1];
5833         struct cfg80211_connect_params connect;
5834         struct wiphy *wiphy;
5835         struct cfg80211_cached_keys *connkeys = NULL;
5836         int err;
5837
5838         memset(&connect, 0, sizeof(connect));
5839
5840         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
5841                 return -EINVAL;
5842
5843         if (!info->attrs[NL80211_ATTR_SSID] ||
5844             !nla_len(info->attrs[NL80211_ATTR_SSID]))
5845                 return -EINVAL;
5846
5847         if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
5848                 connect.auth_type =
5849                         nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
5850                 if (!nl80211_valid_auth_type(rdev, connect.auth_type,
5851                                              NL80211_CMD_CONNECT))
5852                         return -EINVAL;
5853         } else
5854                 connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
5855
5856         connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
5857
5858         err = nl80211_crypto_settings(rdev, info, &connect.crypto,
5859                                       NL80211_MAX_NR_CIPHER_SUITES);
5860         if (err)
5861                 return err;
5862
5863         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5864             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5865                 return -EOPNOTSUPP;
5866
5867         wiphy = &rdev->wiphy;
5868
5869         connect.bg_scan_period = -1;
5870         if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
5871                 (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
5872                 connect.bg_scan_period =
5873                         nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
5874         }
5875
5876         if (info->attrs[NL80211_ATTR_MAC])
5877                 connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5878         connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
5879         connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
5880
5881         if (info->attrs[NL80211_ATTR_IE]) {
5882                 connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
5883                 connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
5884         }
5885
5886         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
5887                 connect.channel =
5888                         ieee80211_get_channel(wiphy,
5889                             nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
5890                 if (!connect.channel ||
5891                     connect.channel->flags & IEEE80211_CHAN_DISABLED)
5892                         return -EINVAL;
5893         }
5894
5895         if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
5896                 connkeys = nl80211_parse_connkeys(rdev,
5897                                           info->attrs[NL80211_ATTR_KEYS], NULL);
5898                 if (IS_ERR(connkeys))
5899                         return PTR_ERR(connkeys);
5900         }
5901
5902         if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
5903                 connect.flags |= ASSOC_REQ_DISABLE_HT;
5904
5905         if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
5906                 memcpy(&connect.ht_capa_mask,
5907                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
5908                        sizeof(connect.ht_capa_mask));
5909
5910         if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
5911                 if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
5912                         kfree(connkeys);
5913                         return -EINVAL;
5914                 }
5915                 memcpy(&connect.ht_capa,
5916                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
5917                        sizeof(connect.ht_capa));
5918         }
5919
5920         err = cfg80211_connect(rdev, dev, &connect, connkeys);
5921         if (err)
5922                 kfree(connkeys);
5923         return err;
5924 }
5925
5926 static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
5927 {
5928         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5929         struct net_device *dev = info->user_ptr[1];
5930         u16 reason;
5931
5932         if (!info->attrs[NL80211_ATTR_REASON_CODE])
5933                 reason = WLAN_REASON_DEAUTH_LEAVING;
5934         else
5935                 reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
5936
5937         if (reason == 0)
5938                 return -EINVAL;
5939
5940         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5941             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5942                 return -EOPNOTSUPP;
5943
5944         return cfg80211_disconnect(rdev, dev, reason, true);
5945 }
5946
5947 static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
5948 {
5949         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5950         struct net *net;
5951         int err;
5952         u32 pid;
5953
5954         if (!info->attrs[NL80211_ATTR_PID])
5955                 return -EINVAL;
5956
5957         pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
5958
5959         net = get_net_ns_by_pid(pid);
5960         if (IS_ERR(net))
5961                 return PTR_ERR(net);
5962
5963         err = 0;
5964
5965         /* check if anything to do */
5966         if (!net_eq(wiphy_net(&rdev->wiphy), net))
5967                 err = cfg80211_switch_netns(rdev, net);
5968
5969         put_net(net);
5970         return err;
5971 }
5972
5973 static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
5974 {
5975         struct cfg80211_registered_device *rdev = info->user_ptr[0];
5976         int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
5977                         struct cfg80211_pmksa *pmksa) = NULL;
5978         struct net_device *dev = info->user_ptr[1];
5979         struct cfg80211_pmksa pmksa;
5980
5981         memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
5982
5983         if (!info->attrs[NL80211_ATTR_MAC])
5984                 return -EINVAL;
5985
5986         if (!info->attrs[NL80211_ATTR_PMKID])
5987                 return -EINVAL;
5988
5989         pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
5990         pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
5991
5992         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
5993             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
5994                 return -EOPNOTSUPP;
5995
5996         switch (info->genlhdr->cmd) {
5997         case NL80211_CMD_SET_PMKSA:
5998                 rdev_ops = rdev->ops->set_pmksa;
5999                 break;
6000         case NL80211_CMD_DEL_PMKSA:
6001                 rdev_ops = rdev->ops->del_pmksa;
6002                 break;
6003         default:
6004                 WARN_ON(1);
6005                 break;
6006         }
6007
6008         if (!rdev_ops)
6009                 return -EOPNOTSUPP;
6010
6011         return rdev_ops(&rdev->wiphy, dev, &pmksa);
6012 }
6013
6014 static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
6015 {
6016         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6017         struct net_device *dev = info->user_ptr[1];
6018
6019         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
6020             dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
6021                 return -EOPNOTSUPP;
6022
6023         if (!rdev->ops->flush_pmksa)
6024                 return -EOPNOTSUPP;
6025
6026         return rdev_flush_pmksa(rdev, dev);
6027 }
6028
6029 static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
6030 {
6031         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6032         struct net_device *dev = info->user_ptr[1];
6033         u8 action_code, dialog_token;
6034         u16 status_code;
6035         u8 *peer;
6036
6037         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6038             !rdev->ops->tdls_mgmt)
6039                 return -EOPNOTSUPP;
6040
6041         if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
6042             !info->attrs[NL80211_ATTR_STATUS_CODE] ||
6043             !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
6044             !info->attrs[NL80211_ATTR_IE] ||
6045             !info->attrs[NL80211_ATTR_MAC])
6046                 return -EINVAL;
6047
6048         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6049         action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
6050         status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
6051         dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
6052
6053         return rdev_tdls_mgmt(rdev, dev, peer, action_code,
6054                               dialog_token, status_code,
6055                               nla_data(info->attrs[NL80211_ATTR_IE]),
6056                               nla_len(info->attrs[NL80211_ATTR_IE]));
6057 }
6058
6059 static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
6060 {
6061         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6062         struct net_device *dev = info->user_ptr[1];
6063         enum nl80211_tdls_operation operation;
6064         u8 *peer;
6065
6066         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
6067             !rdev->ops->tdls_oper)
6068                 return -EOPNOTSUPP;
6069
6070         if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
6071             !info->attrs[NL80211_ATTR_MAC])
6072                 return -EINVAL;
6073
6074         operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
6075         peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
6076
6077         return rdev_tdls_oper(rdev, dev, peer, operation);
6078 }
6079
6080 static int nl80211_remain_on_channel(struct sk_buff *skb,
6081                                      struct genl_info *info)
6082 {
6083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6084         struct wireless_dev *wdev = info->user_ptr[1];
6085         struct cfg80211_chan_def chandef;
6086         struct sk_buff *msg;
6087         void *hdr;
6088         u64 cookie;
6089         u32 duration;
6090         int err;
6091
6092         if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
6093             !info->attrs[NL80211_ATTR_DURATION])
6094                 return -EINVAL;
6095
6096         duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6097
6098         if (!rdev->ops->remain_on_channel ||
6099             !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
6100                 return -EOPNOTSUPP;
6101
6102         /*
6103          * We should be on that channel for at least a minimum amount of
6104          * time (10ms) but no longer than the driver supports.
6105          */
6106         if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6107             duration > rdev->wiphy.max_remain_on_channel_duration)
6108                 return -EINVAL;
6109
6110         err = nl80211_parse_chandef(rdev, info, &chandef);
6111         if (err)
6112                 return err;
6113
6114         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6115         if (!msg)
6116                 return -ENOMEM;
6117
6118         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6119                              NL80211_CMD_REMAIN_ON_CHANNEL);
6120
6121         if (IS_ERR(hdr)) {
6122                 err = PTR_ERR(hdr);
6123                 goto free_msg;
6124         }
6125
6126         err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
6127                                      duration, &cookie);
6128
6129         if (err)
6130                 goto free_msg;
6131
6132         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6133                 goto nla_put_failure;
6134
6135         genlmsg_end(msg, hdr);
6136
6137         return genlmsg_reply(msg, info);
6138
6139  nla_put_failure:
6140         err = -ENOBUFS;
6141  free_msg:
6142         nlmsg_free(msg);
6143         return err;
6144 }
6145
6146 static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
6147                                             struct genl_info *info)
6148 {
6149         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6150         struct wireless_dev *wdev = info->user_ptr[1];
6151         u64 cookie;
6152
6153         if (!info->attrs[NL80211_ATTR_COOKIE])
6154                 return -EINVAL;
6155
6156         if (!rdev->ops->cancel_remain_on_channel)
6157                 return -EOPNOTSUPP;
6158
6159         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6160
6161         return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
6162 }
6163
6164 static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
6165                            u8 *rates, u8 rates_len)
6166 {
6167         u8 i;
6168         u32 mask = 0;
6169
6170         for (i = 0; i < rates_len; i++) {
6171                 int rate = (rates[i] & 0x7f) * 5;
6172                 int ridx;
6173                 for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
6174                         struct ieee80211_rate *srate =
6175                                 &sband->bitrates[ridx];
6176                         if (rate == srate->bitrate) {
6177                                 mask |= 1 << ridx;
6178                                 break;
6179                         }
6180                 }
6181                 if (ridx == sband->n_bitrates)
6182                         return 0; /* rate not found */
6183         }
6184
6185         return mask;
6186 }
6187
6188 static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
6189                                u8 *rates, u8 rates_len,
6190                                u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
6191 {
6192         u8 i;
6193
6194         memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
6195
6196         for (i = 0; i < rates_len; i++) {
6197                 int ridx, rbit;
6198
6199                 ridx = rates[i] / 8;
6200                 rbit = BIT(rates[i] % 8);
6201
6202                 /* check validity */
6203                 if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
6204                         return false;
6205
6206                 /* check availability */
6207                 if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
6208                         mcs[ridx] |= rbit;
6209                 else
6210                         return false;
6211         }
6212
6213         return true;
6214 }
6215
6216 static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
6217         [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
6218                                     .len = NL80211_MAX_SUPP_RATES },
6219         [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
6220                                  .len = NL80211_MAX_SUPP_HT_RATES },
6221 };
6222
6223 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
6224                                        struct genl_info *info)
6225 {
6226         struct nlattr *tb[NL80211_TXRATE_MAX + 1];
6227         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6228         struct cfg80211_bitrate_mask mask;
6229         int rem, i;
6230         struct net_device *dev = info->user_ptr[1];
6231         struct nlattr *tx_rates;
6232         struct ieee80211_supported_band *sband;
6233
6234         if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
6235                 return -EINVAL;
6236
6237         if (!rdev->ops->set_bitrate_mask)
6238                 return -EOPNOTSUPP;
6239
6240         memset(&mask, 0, sizeof(mask));
6241         /* Default to all rates enabled */
6242         for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
6243                 sband = rdev->wiphy.bands[i];
6244                 mask.control[i].legacy =
6245                         sband ? (1 << sband->n_bitrates) - 1 : 0;
6246                 if (sband)
6247                         memcpy(mask.control[i].mcs,
6248                                sband->ht_cap.mcs.rx_mask,
6249                                sizeof(mask.control[i].mcs));
6250                 else
6251                         memset(mask.control[i].mcs, 0,
6252                                sizeof(mask.control[i].mcs));
6253         }
6254
6255         /*
6256          * The nested attribute uses enum nl80211_band as the index. This maps
6257          * directly to the enum ieee80211_band values used in cfg80211.
6258          */
6259         BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
6260         nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
6261         {
6262                 enum ieee80211_band band = nla_type(tx_rates);
6263                 if (band < 0 || band >= IEEE80211_NUM_BANDS)
6264                         return -EINVAL;
6265                 sband = rdev->wiphy.bands[band];
6266                 if (sband == NULL)
6267                         return -EINVAL;
6268                 nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
6269                           nla_len(tx_rates), nl80211_txattr_policy);
6270                 if (tb[NL80211_TXRATE_LEGACY]) {
6271                         mask.control[band].legacy = rateset_to_mask(
6272                                 sband,
6273                                 nla_data(tb[NL80211_TXRATE_LEGACY]),
6274                                 nla_len(tb[NL80211_TXRATE_LEGACY]));
6275                         if ((mask.control[band].legacy == 0) &&
6276                             nla_len(tb[NL80211_TXRATE_LEGACY]))
6277                                 return -EINVAL;
6278                 }
6279                 if (tb[NL80211_TXRATE_MCS]) {
6280                         if (!ht_rateset_to_mask(
6281                                         sband,
6282                                         nla_data(tb[NL80211_TXRATE_MCS]),
6283                                         nla_len(tb[NL80211_TXRATE_MCS]),
6284                                         mask.control[band].mcs))
6285                                 return -EINVAL;
6286                 }
6287
6288                 if (mask.control[band].legacy == 0) {
6289                         /* don't allow empty legacy rates if HT
6290                          * is not even supported. */
6291                         if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
6292                                 return -EINVAL;
6293
6294                         for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
6295                                 if (mask.control[band].mcs[i])
6296                                         break;
6297
6298                         /* legacy and mcs rates may not be both empty */
6299                         if (i == IEEE80211_HT_MCS_MASK_LEN)
6300                                 return -EINVAL;
6301                 }
6302         }
6303
6304         return rdev_set_bitrate_mask(rdev, dev, NULL, &mask);
6305 }
6306
6307 static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
6308 {
6309         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6310         struct wireless_dev *wdev = info->user_ptr[1];
6311         u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
6312
6313         if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
6314                 return -EINVAL;
6315
6316         if (info->attrs[NL80211_ATTR_FRAME_TYPE])
6317                 frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
6318
6319         switch (wdev->iftype) {
6320         case NL80211_IFTYPE_STATION:
6321         case NL80211_IFTYPE_ADHOC:
6322         case NL80211_IFTYPE_P2P_CLIENT:
6323         case NL80211_IFTYPE_AP:
6324         case NL80211_IFTYPE_AP_VLAN:
6325         case NL80211_IFTYPE_MESH_POINT:
6326         case NL80211_IFTYPE_P2P_GO:
6327         case NL80211_IFTYPE_P2P_DEVICE:
6328                 break;
6329         default:
6330                 return -EOPNOTSUPP;
6331         }
6332
6333         /* not much point in registering if we can't reply */
6334         if (!rdev->ops->mgmt_tx)
6335                 return -EOPNOTSUPP;
6336
6337         return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
6338                         nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
6339                         nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
6340 }
6341
6342 static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
6343 {
6344         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6345         struct wireless_dev *wdev = info->user_ptr[1];
6346         struct cfg80211_chan_def chandef;
6347         int err;
6348         void *hdr = NULL;
6349         u64 cookie;
6350         struct sk_buff *msg = NULL;
6351         unsigned int wait = 0;
6352         bool offchan, no_cck, dont_wait_for_ack;
6353
6354         dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
6355
6356         if (!info->attrs[NL80211_ATTR_FRAME])
6357                 return -EINVAL;
6358
6359         if (!rdev->ops->mgmt_tx)
6360                 return -EOPNOTSUPP;
6361
6362         switch (wdev->iftype) {
6363         case NL80211_IFTYPE_STATION:
6364         case NL80211_IFTYPE_ADHOC:
6365         case NL80211_IFTYPE_P2P_CLIENT:
6366         case NL80211_IFTYPE_AP:
6367         case NL80211_IFTYPE_AP_VLAN:
6368         case NL80211_IFTYPE_MESH_POINT:
6369         case NL80211_IFTYPE_P2P_GO:
6370         case NL80211_IFTYPE_P2P_DEVICE:
6371                 break;
6372         default:
6373                 return -EOPNOTSUPP;
6374         }
6375
6376         if (info->attrs[NL80211_ATTR_DURATION]) {
6377                 if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6378                         return -EINVAL;
6379                 wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
6380
6381                 /*
6382                  * We should wait on the channel for at least a minimum amount
6383                  * of time (10ms) but no longer than the driver supports.
6384                  */
6385                 if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
6386                     wait > rdev->wiphy.max_remain_on_channel_duration)
6387                         return -EINVAL;
6388
6389         }
6390
6391         offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
6392
6393         if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
6394                 return -EINVAL;
6395
6396         no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
6397
6398         err = nl80211_parse_chandef(rdev, info, &chandef);
6399         if (err)
6400                 return err;
6401
6402         if (!dont_wait_for_ack) {
6403                 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6404                 if (!msg)
6405                         return -ENOMEM;
6406
6407                 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6408                                      NL80211_CMD_FRAME);
6409
6410                 if (IS_ERR(hdr)) {
6411                         err = PTR_ERR(hdr);
6412                         goto free_msg;
6413                 }
6414         }
6415
6416         err = cfg80211_mlme_mgmt_tx(rdev, wdev, chandef.chan, offchan, wait,
6417                                     nla_data(info->attrs[NL80211_ATTR_FRAME]),
6418                                     nla_len(info->attrs[NL80211_ATTR_FRAME]),
6419                                     no_cck, dont_wait_for_ack, &cookie);
6420         if (err)
6421                 goto free_msg;
6422
6423         if (msg) {
6424                 if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
6425                         goto nla_put_failure;
6426
6427                 genlmsg_end(msg, hdr);
6428                 return genlmsg_reply(msg, info);
6429         }
6430
6431         return 0;
6432
6433  nla_put_failure:
6434         err = -ENOBUFS;
6435  free_msg:
6436         nlmsg_free(msg);
6437         return err;
6438 }
6439
6440 static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
6441 {
6442         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6443         struct wireless_dev *wdev = info->user_ptr[1];
6444         u64 cookie;
6445
6446         if (!info->attrs[NL80211_ATTR_COOKIE])
6447                 return -EINVAL;
6448
6449         if (!rdev->ops->mgmt_tx_cancel_wait)
6450                 return -EOPNOTSUPP;
6451
6452         switch (wdev->iftype) {
6453         case NL80211_IFTYPE_STATION:
6454         case NL80211_IFTYPE_ADHOC:
6455         case NL80211_IFTYPE_P2P_CLIENT:
6456         case NL80211_IFTYPE_AP:
6457         case NL80211_IFTYPE_AP_VLAN:
6458         case NL80211_IFTYPE_P2P_GO:
6459         case NL80211_IFTYPE_P2P_DEVICE:
6460                 break;
6461         default:
6462                 return -EOPNOTSUPP;
6463         }
6464
6465         cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
6466
6467         return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
6468 }
6469
6470 static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
6471 {
6472         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6473         struct wireless_dev *wdev;
6474         struct net_device *dev = info->user_ptr[1];
6475         u8 ps_state;
6476         bool state;
6477         int err;
6478
6479         if (!info->attrs[NL80211_ATTR_PS_STATE])
6480                 return -EINVAL;
6481
6482         ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
6483
6484         if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
6485                 return -EINVAL;
6486
6487         wdev = dev->ieee80211_ptr;
6488
6489         if (!rdev->ops->set_power_mgmt)
6490                 return -EOPNOTSUPP;
6491
6492         state = (ps_state == NL80211_PS_ENABLED) ? true : false;
6493
6494         if (state == wdev->ps)
6495                 return 0;
6496
6497         err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
6498         if (!err)
6499                 wdev->ps = state;
6500         return err;
6501 }
6502
6503 static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
6504 {
6505         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6506         enum nl80211_ps_state ps_state;
6507         struct wireless_dev *wdev;
6508         struct net_device *dev = info->user_ptr[1];
6509         struct sk_buff *msg;
6510         void *hdr;
6511         int err;
6512
6513         wdev = dev->ieee80211_ptr;
6514
6515         if (!rdev->ops->set_power_mgmt)
6516                 return -EOPNOTSUPP;
6517
6518         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6519         if (!msg)
6520                 return -ENOMEM;
6521
6522         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6523                              NL80211_CMD_GET_POWER_SAVE);
6524         if (!hdr) {
6525                 err = -ENOBUFS;
6526                 goto free_msg;
6527         }
6528
6529         if (wdev->ps)
6530                 ps_state = NL80211_PS_ENABLED;
6531         else
6532                 ps_state = NL80211_PS_DISABLED;
6533
6534         if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
6535                 goto nla_put_failure;
6536
6537         genlmsg_end(msg, hdr);
6538         return genlmsg_reply(msg, info);
6539
6540  nla_put_failure:
6541         err = -ENOBUFS;
6542  free_msg:
6543         nlmsg_free(msg);
6544         return err;
6545 }
6546
6547 static struct nla_policy
6548 nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
6549         [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
6550         [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
6551         [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
6552         [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
6553         [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
6554         [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
6555 };
6556
6557 static int nl80211_set_cqm_txe(struct genl_info *info,
6558                                u32 rate, u32 pkts, u32 intvl)
6559 {
6560         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6561         struct wireless_dev *wdev;
6562         struct net_device *dev = info->user_ptr[1];
6563
6564         if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
6565                 return -EINVAL;
6566
6567         wdev = dev->ieee80211_ptr;
6568
6569         if (!rdev->ops->set_cqm_txe_config)
6570                 return -EOPNOTSUPP;
6571
6572         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6573             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6574                 return -EOPNOTSUPP;
6575
6576         return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
6577 }
6578
6579 static int nl80211_set_cqm_rssi(struct genl_info *info,
6580                                 s32 threshold, u32 hysteresis)
6581 {
6582         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6583         struct wireless_dev *wdev;
6584         struct net_device *dev = info->user_ptr[1];
6585
6586         if (threshold > 0)
6587                 return -EINVAL;
6588
6589         wdev = dev->ieee80211_ptr;
6590
6591         if (!rdev->ops->set_cqm_rssi_config)
6592                 return -EOPNOTSUPP;
6593
6594         if (wdev->iftype != NL80211_IFTYPE_STATION &&
6595             wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
6596                 return -EOPNOTSUPP;
6597
6598         return rdev_set_cqm_rssi_config(rdev, dev, threshold, hysteresis);
6599 }
6600
6601 static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
6602 {
6603         struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
6604         struct nlattr *cqm;
6605         int err;
6606
6607         cqm = info->attrs[NL80211_ATTR_CQM];
6608         if (!cqm) {
6609                 err = -EINVAL;
6610                 goto out;
6611         }
6612
6613         err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
6614                                nl80211_attr_cqm_policy);
6615         if (err)
6616                 goto out;
6617
6618         if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
6619             attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
6620                 s32 threshold;
6621                 u32 hysteresis;
6622                 threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
6623                 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
6624                 err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
6625         } else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
6626                    attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
6627                    attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
6628                 u32 rate, pkts, intvl;
6629                 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
6630                 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
6631                 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
6632                 err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
6633         } else
6634                 err = -EINVAL;
6635
6636 out:
6637         return err;
6638 }
6639
6640 static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
6641 {
6642         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6643         struct net_device *dev = info->user_ptr[1];
6644         struct mesh_config cfg;
6645         struct mesh_setup setup;
6646         int err;
6647
6648         /* start with default */
6649         memcpy(&cfg, &default_mesh_config, sizeof(cfg));
6650         memcpy(&setup, &default_mesh_setup, sizeof(setup));
6651
6652         if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
6653                 /* and parse parameters if given */
6654                 err = nl80211_parse_mesh_config(info, &cfg, NULL);
6655                 if (err)
6656                         return err;
6657         }
6658
6659         if (!info->attrs[NL80211_ATTR_MESH_ID] ||
6660             !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
6661                 return -EINVAL;
6662
6663         setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
6664         setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
6665
6666         if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
6667             !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
6668                             nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
6669                         return -EINVAL;
6670
6671         if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
6672                 /* parse additional setup parameters if given */
6673                 err = nl80211_parse_mesh_setup(info, &setup);
6674                 if (err)
6675                         return err;
6676         }
6677
6678         if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
6679                 err = nl80211_parse_chandef(rdev, info, &setup.chandef);
6680                 if (err)
6681                         return err;
6682         } else {
6683                 /* cfg80211_join_mesh() will sort it out */
6684                 setup.chandef.chan = NULL;
6685         }
6686
6687         return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
6688 }
6689
6690 static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
6691 {
6692         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6693         struct net_device *dev = info->user_ptr[1];
6694
6695         return cfg80211_leave_mesh(rdev, dev);
6696 }
6697
6698 #ifdef CONFIG_PM
6699 static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
6700 {
6701         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6702         struct sk_buff *msg;
6703         void *hdr;
6704
6705         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6706                 return -EOPNOTSUPP;
6707
6708         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
6709         if (!msg)
6710                 return -ENOMEM;
6711
6712         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
6713                              NL80211_CMD_GET_WOWLAN);
6714         if (!hdr)
6715                 goto nla_put_failure;
6716
6717         if (rdev->wowlan) {
6718                 struct nlattr *nl_wowlan;
6719
6720                 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
6721                 if (!nl_wowlan)
6722                         goto nla_put_failure;
6723
6724                 if ((rdev->wowlan->any &&
6725                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
6726                     (rdev->wowlan->disconnect &&
6727                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
6728                     (rdev->wowlan->magic_pkt &&
6729                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
6730                     (rdev->wowlan->gtk_rekey_failure &&
6731                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
6732                     (rdev->wowlan->eap_identity_req &&
6733                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
6734                     (rdev->wowlan->four_way_handshake &&
6735                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
6736                     (rdev->wowlan->rfkill_release &&
6737                      nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
6738                         goto nla_put_failure;
6739                 if (rdev->wowlan->n_patterns) {
6740                         struct nlattr *nl_pats, *nl_pat;
6741                         int i, pat_len;
6742
6743                         nl_pats = nla_nest_start(msg,
6744                                         NL80211_WOWLAN_TRIG_PKT_PATTERN);
6745                         if (!nl_pats)
6746                                 goto nla_put_failure;
6747
6748                         for (i = 0; i < rdev->wowlan->n_patterns; i++) {
6749                                 nl_pat = nla_nest_start(msg, i + 1);
6750                                 if (!nl_pat)
6751                                         goto nla_put_failure;
6752                                 pat_len = rdev->wowlan->patterns[i].pattern_len;
6753                                 if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
6754                                             DIV_ROUND_UP(pat_len, 8),
6755                                             rdev->wowlan->patterns[i].mask) ||
6756                                     nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
6757                                             pat_len,
6758                                             rdev->wowlan->patterns[i].pattern))
6759                                         goto nla_put_failure;
6760                                 nla_nest_end(msg, nl_pat);
6761                         }
6762                         nla_nest_end(msg, nl_pats);
6763                 }
6764
6765                 nla_nest_end(msg, nl_wowlan);
6766         }
6767
6768         genlmsg_end(msg, hdr);
6769         return genlmsg_reply(msg, info);
6770
6771 nla_put_failure:
6772         nlmsg_free(msg);
6773         return -ENOBUFS;
6774 }
6775
6776 static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
6777 {
6778         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6779         struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
6780         struct cfg80211_wowlan new_triggers = {};
6781         struct cfg80211_wowlan *ntrig;
6782         struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
6783         int err, i;
6784         bool prev_enabled = rdev->wowlan;
6785
6786         if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
6787                 return -EOPNOTSUPP;
6788
6789         if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
6790                 cfg80211_rdev_free_wowlan(rdev);
6791                 rdev->wowlan = NULL;
6792                 goto set_wakeup;
6793         }
6794
6795         err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
6796                         nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6797                         nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
6798                         nl80211_wowlan_policy);
6799         if (err)
6800                 return err;
6801
6802         if (tb[NL80211_WOWLAN_TRIG_ANY]) {
6803                 if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
6804                         return -EINVAL;
6805                 new_triggers.any = true;
6806         }
6807
6808         if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
6809                 if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
6810                         return -EINVAL;
6811                 new_triggers.disconnect = true;
6812         }
6813
6814         if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
6815                 if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
6816                         return -EINVAL;
6817                 new_triggers.magic_pkt = true;
6818         }
6819
6820         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
6821                 return -EINVAL;
6822
6823         if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
6824                 if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
6825                         return -EINVAL;
6826                 new_triggers.gtk_rekey_failure = true;
6827         }
6828
6829         if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
6830                 if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
6831                         return -EINVAL;
6832                 new_triggers.eap_identity_req = true;
6833         }
6834
6835         if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
6836                 if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
6837                         return -EINVAL;
6838                 new_triggers.four_way_handshake = true;
6839         }
6840
6841         if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
6842                 if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
6843                         return -EINVAL;
6844                 new_triggers.rfkill_release = true;
6845         }
6846
6847         if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
6848                 struct nlattr *pat;
6849                 int n_patterns = 0;
6850                 int rem, pat_len, mask_len;
6851                 struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
6852
6853                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6854                                     rem)
6855                         n_patterns++;
6856                 if (n_patterns > wowlan->n_patterns)
6857                         return -EINVAL;
6858
6859                 new_triggers.patterns = kcalloc(n_patterns,
6860                                                 sizeof(new_triggers.patterns[0]),
6861                                                 GFP_KERNEL);
6862                 if (!new_triggers.patterns)
6863                         return -ENOMEM;
6864
6865                 new_triggers.n_patterns = n_patterns;
6866                 i = 0;
6867
6868                 nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
6869                                     rem) {
6870                         nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
6871                                   nla_data(pat), nla_len(pat), NULL);
6872                         err = -EINVAL;
6873                         if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
6874                             !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
6875                                 goto error;
6876                         pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
6877                         mask_len = DIV_ROUND_UP(pat_len, 8);
6878                         if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
6879                             mask_len)
6880                                 goto error;
6881                         if (pat_len > wowlan->pattern_max_len ||
6882                             pat_len < wowlan->pattern_min_len)
6883                                 goto error;
6884
6885                         new_triggers.patterns[i].mask =
6886                                 kmalloc(mask_len + pat_len, GFP_KERNEL);
6887                         if (!new_triggers.patterns[i].mask) {
6888                                 err = -ENOMEM;
6889                                 goto error;
6890                         }
6891                         new_triggers.patterns[i].pattern =
6892                                 new_triggers.patterns[i].mask + mask_len;
6893                         memcpy(new_triggers.patterns[i].mask,
6894                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
6895                                mask_len);
6896                         new_triggers.patterns[i].pattern_len = pat_len;
6897                         memcpy(new_triggers.patterns[i].pattern,
6898                                nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
6899                                pat_len);
6900                         i++;
6901                 }
6902         }
6903
6904         ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
6905         if (!ntrig) {
6906                 err = -ENOMEM;
6907                 goto error;
6908         }
6909         cfg80211_rdev_free_wowlan(rdev);
6910         rdev->wowlan = ntrig;
6911
6912  set_wakeup:
6913         if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
6914                 rdev_set_wakeup(rdev, rdev->wowlan);
6915
6916         return 0;
6917  error:
6918         for (i = 0; i < new_triggers.n_patterns; i++)
6919                 kfree(new_triggers.patterns[i].mask);
6920         kfree(new_triggers.patterns);
6921         return err;
6922 }
6923 #endif
6924
6925 static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
6926 {
6927         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6928         struct net_device *dev = info->user_ptr[1];
6929         struct wireless_dev *wdev = dev->ieee80211_ptr;
6930         struct nlattr *tb[NUM_NL80211_REKEY_DATA];
6931         struct cfg80211_gtk_rekey_data rekey_data;
6932         int err;
6933
6934         if (!info->attrs[NL80211_ATTR_REKEY_DATA])
6935                 return -EINVAL;
6936
6937         err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
6938                         nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
6939                         nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
6940                         nl80211_rekey_policy);
6941         if (err)
6942                 return err;
6943
6944         if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
6945                 return -ERANGE;
6946         if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
6947                 return -ERANGE;
6948         if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
6949                 return -ERANGE;
6950
6951         memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
6952                NL80211_KEK_LEN);
6953         memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
6954                NL80211_KCK_LEN);
6955         memcpy(rekey_data.replay_ctr,
6956                nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
6957                NL80211_REPLAY_CTR_LEN);
6958
6959         wdev_lock(wdev);
6960         if (!wdev->current_bss) {
6961                 err = -ENOTCONN;
6962                 goto out;
6963         }
6964
6965         if (!rdev->ops->set_rekey_data) {
6966                 err = -EOPNOTSUPP;
6967                 goto out;
6968         }
6969
6970         err = rdev_set_rekey_data(rdev, dev, &rekey_data);
6971  out:
6972         wdev_unlock(wdev);
6973         return err;
6974 }
6975
6976 static int nl80211_register_unexpected_frame(struct sk_buff *skb,
6977                                              struct genl_info *info)
6978 {
6979         struct net_device *dev = info->user_ptr[1];
6980         struct wireless_dev *wdev = dev->ieee80211_ptr;
6981
6982         if (wdev->iftype != NL80211_IFTYPE_AP &&
6983             wdev->iftype != NL80211_IFTYPE_P2P_GO)
6984                 return -EINVAL;
6985
6986         if (wdev->ap_unexpected_nlportid)
6987                 return -EBUSY;
6988
6989         wdev->ap_unexpected_nlportid = info->snd_portid;
6990         return 0;
6991 }
6992
6993 static int nl80211_probe_client(struct sk_buff *skb,
6994                                 struct genl_info *info)
6995 {
6996         struct cfg80211_registered_device *rdev = info->user_ptr[0];
6997         struct net_device *dev = info->user_ptr[1];
6998         struct wireless_dev *wdev = dev->ieee80211_ptr;
6999         struct sk_buff *msg;
7000         void *hdr;
7001         const u8 *addr;
7002         u64 cookie;
7003         int err;
7004
7005         if (wdev->iftype != NL80211_IFTYPE_AP &&
7006             wdev->iftype != NL80211_IFTYPE_P2P_GO)
7007                 return -EOPNOTSUPP;
7008
7009         if (!info->attrs[NL80211_ATTR_MAC])
7010                 return -EINVAL;
7011
7012         if (!rdev->ops->probe_client)
7013                 return -EOPNOTSUPP;
7014
7015         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7016         if (!msg)
7017                 return -ENOMEM;
7018
7019         hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
7020                              NL80211_CMD_PROBE_CLIENT);
7021
7022         if (IS_ERR(hdr)) {
7023                 err = PTR_ERR(hdr);
7024                 goto free_msg;
7025         }
7026
7027         addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
7028
7029         err = rdev_probe_client(rdev, dev, addr, &cookie);
7030         if (err)
7031                 goto free_msg;
7032
7033         if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
7034                 goto nla_put_failure;
7035
7036         genlmsg_end(msg, hdr);
7037
7038         return genlmsg_reply(msg, info);
7039
7040  nla_put_failure:
7041         err = -ENOBUFS;
7042  free_msg:
7043         nlmsg_free(msg);
7044         return err;
7045 }
7046
7047 static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
7048 {
7049         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7050         struct cfg80211_beacon_registration *reg, *nreg;
7051         int rv;
7052
7053         if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
7054                 return -EOPNOTSUPP;
7055
7056         nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
7057         if (!nreg)
7058                 return -ENOMEM;
7059
7060         /* First, check if already registered. */
7061         spin_lock_bh(&rdev->beacon_registrations_lock);
7062         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
7063                 if (reg->nlportid == info->snd_portid) {
7064                         rv = -EALREADY;
7065                         goto out_err;
7066                 }
7067         }
7068         /* Add it to the list */
7069         nreg->nlportid = info->snd_portid;
7070         list_add(&nreg->list, &rdev->beacon_registrations);
7071
7072         spin_unlock_bh(&rdev->beacon_registrations_lock);
7073
7074         return 0;
7075 out_err:
7076         spin_unlock_bh(&rdev->beacon_registrations_lock);
7077         kfree(nreg);
7078         return rv;
7079 }
7080
7081 static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
7082 {
7083         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7084         struct wireless_dev *wdev = info->user_ptr[1];
7085         int err;
7086
7087         if (!rdev->ops->start_p2p_device)
7088                 return -EOPNOTSUPP;
7089
7090         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7091                 return -EOPNOTSUPP;
7092
7093         if (wdev->p2p_started)
7094                 return 0;
7095
7096         mutex_lock(&rdev->devlist_mtx);
7097         err = cfg80211_can_add_interface(rdev, wdev->iftype);
7098         mutex_unlock(&rdev->devlist_mtx);
7099         if (err)
7100                 return err;
7101
7102         err = rdev_start_p2p_device(rdev, wdev);
7103         if (err)
7104                 return err;
7105
7106         wdev->p2p_started = true;
7107         mutex_lock(&rdev->devlist_mtx);
7108         rdev->opencount++;
7109         mutex_unlock(&rdev->devlist_mtx);
7110
7111         return 0;
7112 }
7113
7114 static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
7115 {
7116         struct cfg80211_registered_device *rdev = info->user_ptr[0];
7117         struct wireless_dev *wdev = info->user_ptr[1];
7118
7119         if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
7120                 return -EOPNOTSUPP;
7121
7122         if (!rdev->ops->stop_p2p_device)
7123                 return -EOPNOTSUPP;
7124
7125         if (!wdev->p2p_started)
7126                 return 0;
7127
7128         rdev_stop_p2p_device(rdev, wdev);
7129         wdev->p2p_started = false;
7130
7131         mutex_lock(&rdev->devlist_mtx);
7132         rdev->opencount--;
7133         mutex_unlock(&rdev->devlist_mtx);
7134
7135         if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) {
7136                 rdev->scan_req->aborted = true;
7137                 ___cfg80211_scan_done(rdev, true);
7138         }
7139
7140         return 0;
7141 }
7142
7143 #define NL80211_FLAG_NEED_WIPHY         0x01
7144 #define NL80211_FLAG_NEED_NETDEV        0x02
7145 #define NL80211_FLAG_NEED_RTNL          0x04
7146 #define NL80211_FLAG_CHECK_NETDEV_UP    0x08
7147 #define NL80211_FLAG_NEED_NETDEV_UP     (NL80211_FLAG_NEED_NETDEV |\
7148                                          NL80211_FLAG_CHECK_NETDEV_UP)
7149 #define NL80211_FLAG_NEED_WDEV          0x10
7150 /* If a netdev is associated, it must be UP, P2P must be started */
7151 #define NL80211_FLAG_NEED_WDEV_UP       (NL80211_FLAG_NEED_WDEV |\
7152                                          NL80211_FLAG_CHECK_NETDEV_UP)
7153
7154 static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
7155                             struct genl_info *info)
7156 {
7157         struct cfg80211_registered_device *rdev;
7158         struct wireless_dev *wdev;
7159         struct net_device *dev;
7160         bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
7161
7162         if (rtnl)
7163                 rtnl_lock();
7164
7165         if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
7166                 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
7167                 if (IS_ERR(rdev)) {
7168                         if (rtnl)
7169                                 rtnl_unlock();
7170                         return PTR_ERR(rdev);
7171                 }
7172                 info->user_ptr[0] = rdev;
7173         } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV ||
7174                    ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7175                 mutex_lock(&cfg80211_mutex);
7176                 wdev = __cfg80211_wdev_from_attrs(genl_info_net(info),
7177                                                   info->attrs);
7178                 if (IS_ERR(wdev)) {
7179                         mutex_unlock(&cfg80211_mutex);
7180                         if (rtnl)
7181                                 rtnl_unlock();
7182                         return PTR_ERR(wdev);
7183                 }
7184
7185                 dev = wdev->netdev;
7186                 rdev = wiphy_to_dev(wdev->wiphy);
7187
7188                 if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
7189                         if (!dev) {
7190                                 mutex_unlock(&cfg80211_mutex);
7191                                 if (rtnl)
7192                                         rtnl_unlock();
7193                                 return -EINVAL;
7194                         }
7195
7196                         info->user_ptr[1] = dev;
7197                 } else {
7198                         info->user_ptr[1] = wdev;
7199                 }
7200
7201                 if (dev) {
7202                         if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
7203                             !netif_running(dev)) {
7204                                 mutex_unlock(&cfg80211_mutex);
7205                                 if (rtnl)
7206                                         rtnl_unlock();
7207                                 return -ENETDOWN;
7208                         }
7209
7210                         dev_hold(dev);
7211                 } else if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP) {
7212                         if (!wdev->p2p_started) {
7213                                 mutex_unlock(&cfg80211_mutex);
7214                                 if (rtnl)
7215                                         rtnl_unlock();
7216                                 return -ENETDOWN;
7217                         }
7218                 }
7219
7220                 cfg80211_lock_rdev(rdev);
7221
7222                 mutex_unlock(&cfg80211_mutex);
7223
7224                 info->user_ptr[0] = rdev;
7225         }
7226
7227         return 0;
7228 }
7229
7230 static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
7231                               struct genl_info *info)
7232 {
7233         if (info->user_ptr[0])
7234                 cfg80211_unlock_rdev(info->user_ptr[0]);
7235         if (info->user_ptr[1]) {
7236                 if (ops->internal_flags & NL80211_FLAG_NEED_WDEV) {
7237                         struct wireless_dev *wdev = info->user_ptr[1];
7238
7239                         if (wdev->netdev)
7240                                 dev_put(wdev->netdev);
7241                 } else {
7242                         dev_put(info->user_ptr[1]);
7243                 }
7244         }
7245         if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
7246                 rtnl_unlock();
7247 }
7248
7249 static struct genl_ops nl80211_ops[] = {
7250         {
7251                 .cmd = NL80211_CMD_GET_WIPHY,
7252                 .doit = nl80211_get_wiphy,
7253                 .dumpit = nl80211_dump_wiphy,
7254                 .policy = nl80211_policy,
7255                 /* can be retrieved by unprivileged users */
7256                 .internal_flags = NL80211_FLAG_NEED_WIPHY,
7257         },
7258         {
7259                 .cmd = NL80211_CMD_SET_WIPHY,
7260                 .doit = nl80211_set_wiphy,
7261                 .policy = nl80211_policy,
7262                 .flags = GENL_ADMIN_PERM,
7263                 .internal_flags = NL80211_FLAG_NEED_RTNL,
7264         },
7265         {
7266                 .cmd = NL80211_CMD_GET_INTERFACE,
7267                 .doit = nl80211_get_interface,
7268                 .dumpit = nl80211_dump_interface,
7269                 .policy = nl80211_policy,
7270                 /* can be retrieved by unprivileged users */
7271                 .internal_flags = NL80211_FLAG_NEED_WDEV,
7272         },
7273         {
7274                 .cmd = NL80211_CMD_SET_INTERFACE,
7275                 .doit = nl80211_set_interface,
7276                 .policy = nl80211_policy,
7277                 .flags = GENL_ADMIN_PERM,
7278                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7279                                   NL80211_FLAG_NEED_RTNL,
7280         },
7281         {
7282                 .cmd = NL80211_CMD_NEW_INTERFACE,
7283                 .doit = nl80211_new_interface,
7284                 .policy = nl80211_policy,
7285                 .flags = GENL_ADMIN_PERM,
7286                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7287                                   NL80211_FLAG_NEED_RTNL,
7288         },
7289         {
7290                 .cmd = NL80211_CMD_DEL_INTERFACE,
7291                 .doit = nl80211_del_interface,
7292                 .policy = nl80211_policy,
7293                 .flags = GENL_ADMIN_PERM,
7294                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7295                                   NL80211_FLAG_NEED_RTNL,
7296         },
7297         {
7298                 .cmd = NL80211_CMD_GET_KEY,
7299                 .doit = nl80211_get_key,
7300                 .policy = nl80211_policy,
7301                 .flags = GENL_ADMIN_PERM,
7302                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7303                                   NL80211_FLAG_NEED_RTNL,
7304         },
7305         {
7306                 .cmd = NL80211_CMD_SET_KEY,
7307                 .doit = nl80211_set_key,
7308                 .policy = nl80211_policy,
7309                 .flags = GENL_ADMIN_PERM,
7310                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7311                                   NL80211_FLAG_NEED_RTNL,
7312         },
7313         {
7314                 .cmd = NL80211_CMD_NEW_KEY,
7315                 .doit = nl80211_new_key,
7316                 .policy = nl80211_policy,
7317                 .flags = GENL_ADMIN_PERM,
7318                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7319                                   NL80211_FLAG_NEED_RTNL,
7320         },
7321         {
7322                 .cmd = NL80211_CMD_DEL_KEY,
7323                 .doit = nl80211_del_key,
7324                 .policy = nl80211_policy,
7325                 .flags = GENL_ADMIN_PERM,
7326                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7327                                   NL80211_FLAG_NEED_RTNL,
7328         },
7329         {
7330                 .cmd = NL80211_CMD_SET_BEACON,
7331                 .policy = nl80211_policy,
7332                 .flags = GENL_ADMIN_PERM,
7333                 .doit = nl80211_set_beacon,
7334                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7335                                   NL80211_FLAG_NEED_RTNL,
7336         },
7337         {
7338                 .cmd = NL80211_CMD_START_AP,
7339                 .policy = nl80211_policy,
7340                 .flags = GENL_ADMIN_PERM,
7341                 .doit = nl80211_start_ap,
7342                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7343                                   NL80211_FLAG_NEED_RTNL,
7344         },
7345         {
7346                 .cmd = NL80211_CMD_STOP_AP,
7347                 .policy = nl80211_policy,
7348                 .flags = GENL_ADMIN_PERM,
7349                 .doit = nl80211_stop_ap,
7350                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7351                                   NL80211_FLAG_NEED_RTNL,
7352         },
7353         {
7354                 .cmd = NL80211_CMD_GET_STATION,
7355                 .doit = nl80211_get_station,
7356                 .dumpit = nl80211_dump_station,
7357                 .policy = nl80211_policy,
7358                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7359                                   NL80211_FLAG_NEED_RTNL,
7360         },
7361         {
7362                 .cmd = NL80211_CMD_SET_STATION,
7363                 .doit = nl80211_set_station,
7364                 .policy = nl80211_policy,
7365                 .flags = GENL_ADMIN_PERM,
7366                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7367                                   NL80211_FLAG_NEED_RTNL,
7368         },
7369         {
7370                 .cmd = NL80211_CMD_NEW_STATION,
7371                 .doit = nl80211_new_station,
7372                 .policy = nl80211_policy,
7373                 .flags = GENL_ADMIN_PERM,
7374                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7375                                   NL80211_FLAG_NEED_RTNL,
7376         },
7377         {
7378                 .cmd = NL80211_CMD_DEL_STATION,
7379                 .doit = nl80211_del_station,
7380                 .policy = nl80211_policy,
7381                 .flags = GENL_ADMIN_PERM,
7382                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7383                                   NL80211_FLAG_NEED_RTNL,
7384         },
7385         {
7386                 .cmd = NL80211_CMD_GET_MPATH,
7387                 .doit = nl80211_get_mpath,
7388                 .dumpit = nl80211_dump_mpath,
7389                 .policy = nl80211_policy,
7390                 .flags = GENL_ADMIN_PERM,
7391                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7392                                   NL80211_FLAG_NEED_RTNL,
7393         },
7394         {
7395                 .cmd = NL80211_CMD_SET_MPATH,
7396                 .doit = nl80211_set_mpath,
7397                 .policy = nl80211_policy,
7398                 .flags = GENL_ADMIN_PERM,
7399                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7400                                   NL80211_FLAG_NEED_RTNL,
7401         },
7402         {
7403                 .cmd = NL80211_CMD_NEW_MPATH,
7404                 .doit = nl80211_new_mpath,
7405                 .policy = nl80211_policy,
7406                 .flags = GENL_ADMIN_PERM,
7407                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7408                                   NL80211_FLAG_NEED_RTNL,
7409         },
7410         {
7411                 .cmd = NL80211_CMD_DEL_MPATH,
7412                 .doit = nl80211_del_mpath,
7413                 .policy = nl80211_policy,
7414                 .flags = GENL_ADMIN_PERM,
7415                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7416                                   NL80211_FLAG_NEED_RTNL,
7417         },
7418         {
7419                 .cmd = NL80211_CMD_SET_BSS,
7420                 .doit = nl80211_set_bss,
7421                 .policy = nl80211_policy,
7422                 .flags = GENL_ADMIN_PERM,
7423                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7424                                   NL80211_FLAG_NEED_RTNL,
7425         },
7426         {
7427                 .cmd = NL80211_CMD_GET_REG,
7428                 .doit = nl80211_get_reg,
7429                 .policy = nl80211_policy,
7430                 /* can be retrieved by unprivileged users */
7431         },
7432         {
7433                 .cmd = NL80211_CMD_SET_REG,
7434                 .doit = nl80211_set_reg,
7435                 .policy = nl80211_policy,
7436                 .flags = GENL_ADMIN_PERM,
7437         },
7438         {
7439                 .cmd = NL80211_CMD_REQ_SET_REG,
7440                 .doit = nl80211_req_set_reg,
7441                 .policy = nl80211_policy,
7442                 .flags = GENL_ADMIN_PERM,
7443         },
7444         {
7445                 .cmd = NL80211_CMD_GET_MESH_CONFIG,
7446                 .doit = nl80211_get_mesh_config,
7447                 .policy = nl80211_policy,
7448                 /* can be retrieved by unprivileged users */
7449                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7450                                   NL80211_FLAG_NEED_RTNL,
7451         },
7452         {
7453                 .cmd = NL80211_CMD_SET_MESH_CONFIG,
7454                 .doit = nl80211_update_mesh_config,
7455                 .policy = nl80211_policy,
7456                 .flags = GENL_ADMIN_PERM,
7457                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7458                                   NL80211_FLAG_NEED_RTNL,
7459         },
7460         {
7461                 .cmd = NL80211_CMD_TRIGGER_SCAN,
7462                 .doit = nl80211_trigger_scan,
7463                 .policy = nl80211_policy,
7464                 .flags = GENL_ADMIN_PERM,
7465                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7466                                   NL80211_FLAG_NEED_RTNL,
7467         },
7468         {
7469                 .cmd = NL80211_CMD_GET_SCAN,
7470                 .policy = nl80211_policy,
7471                 .dumpit = nl80211_dump_scan,
7472         },
7473         {
7474                 .cmd = NL80211_CMD_START_SCHED_SCAN,
7475                 .doit = nl80211_start_sched_scan,
7476                 .policy = nl80211_policy,
7477                 .flags = GENL_ADMIN_PERM,
7478                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7479                                   NL80211_FLAG_NEED_RTNL,
7480         },
7481         {
7482                 .cmd = NL80211_CMD_STOP_SCHED_SCAN,
7483                 .doit = nl80211_stop_sched_scan,
7484                 .policy = nl80211_policy,
7485                 .flags = GENL_ADMIN_PERM,
7486                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7487                                   NL80211_FLAG_NEED_RTNL,
7488         },
7489         {
7490                 .cmd = NL80211_CMD_AUTHENTICATE,
7491                 .doit = nl80211_authenticate,
7492                 .policy = nl80211_policy,
7493                 .flags = GENL_ADMIN_PERM,
7494                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7495                                   NL80211_FLAG_NEED_RTNL,
7496         },
7497         {
7498                 .cmd = NL80211_CMD_ASSOCIATE,
7499                 .doit = nl80211_associate,
7500                 .policy = nl80211_policy,
7501                 .flags = GENL_ADMIN_PERM,
7502                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7503                                   NL80211_FLAG_NEED_RTNL,
7504         },
7505         {
7506                 .cmd = NL80211_CMD_DEAUTHENTICATE,
7507                 .doit = nl80211_deauthenticate,
7508                 .policy = nl80211_policy,
7509                 .flags = GENL_ADMIN_PERM,
7510                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7511                                   NL80211_FLAG_NEED_RTNL,
7512         },
7513         {
7514                 .cmd = NL80211_CMD_DISASSOCIATE,
7515                 .doit = nl80211_disassociate,
7516                 .policy = nl80211_policy,
7517                 .flags = GENL_ADMIN_PERM,
7518                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7519                                   NL80211_FLAG_NEED_RTNL,
7520         },
7521         {
7522                 .cmd = NL80211_CMD_JOIN_IBSS,
7523                 .doit = nl80211_join_ibss,
7524                 .policy = nl80211_policy,
7525                 .flags = GENL_ADMIN_PERM,
7526                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7527                                   NL80211_FLAG_NEED_RTNL,
7528         },
7529         {
7530                 .cmd = NL80211_CMD_LEAVE_IBSS,
7531                 .doit = nl80211_leave_ibss,
7532                 .policy = nl80211_policy,
7533                 .flags = GENL_ADMIN_PERM,
7534                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7535                                   NL80211_FLAG_NEED_RTNL,
7536         },
7537 #ifdef CONFIG_NL80211_TESTMODE
7538         {
7539                 .cmd = NL80211_CMD_TESTMODE,
7540                 .doit = nl80211_testmode_do,
7541                 .dumpit = nl80211_testmode_dump,
7542                 .policy = nl80211_policy,
7543                 .flags = GENL_ADMIN_PERM,
7544                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7545                                   NL80211_FLAG_NEED_RTNL,
7546         },
7547 #endif
7548         {
7549                 .cmd = NL80211_CMD_CONNECT,
7550                 .doit = nl80211_connect,
7551                 .policy = nl80211_policy,
7552                 .flags = GENL_ADMIN_PERM,
7553                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7554                                   NL80211_FLAG_NEED_RTNL,
7555         },
7556         {
7557                 .cmd = NL80211_CMD_DISCONNECT,
7558                 .doit = nl80211_disconnect,
7559                 .policy = nl80211_policy,
7560                 .flags = GENL_ADMIN_PERM,
7561                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7562                                   NL80211_FLAG_NEED_RTNL,
7563         },
7564         {
7565                 .cmd = NL80211_CMD_SET_WIPHY_NETNS,
7566                 .doit = nl80211_wiphy_netns,
7567                 .policy = nl80211_policy,
7568                 .flags = GENL_ADMIN_PERM,
7569                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7570                                   NL80211_FLAG_NEED_RTNL,
7571         },
7572         {
7573                 .cmd = NL80211_CMD_GET_SURVEY,
7574                 .policy = nl80211_policy,
7575                 .dumpit = nl80211_dump_survey,
7576         },
7577         {
7578                 .cmd = NL80211_CMD_SET_PMKSA,
7579                 .doit = nl80211_setdel_pmksa,
7580                 .policy = nl80211_policy,
7581                 .flags = GENL_ADMIN_PERM,
7582                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7583                                   NL80211_FLAG_NEED_RTNL,
7584         },
7585         {
7586                 .cmd = NL80211_CMD_DEL_PMKSA,
7587                 .doit = nl80211_setdel_pmksa,
7588                 .policy = nl80211_policy,
7589                 .flags = GENL_ADMIN_PERM,
7590                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7591                                   NL80211_FLAG_NEED_RTNL,
7592         },
7593         {
7594                 .cmd = NL80211_CMD_FLUSH_PMKSA,
7595                 .doit = nl80211_flush_pmksa,
7596                 .policy = nl80211_policy,
7597                 .flags = GENL_ADMIN_PERM,
7598                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7599                                   NL80211_FLAG_NEED_RTNL,
7600         },
7601         {
7602                 .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
7603                 .doit = nl80211_remain_on_channel,
7604                 .policy = nl80211_policy,
7605                 .flags = GENL_ADMIN_PERM,
7606                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7607                                   NL80211_FLAG_NEED_RTNL,
7608         },
7609         {
7610                 .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
7611                 .doit = nl80211_cancel_remain_on_channel,
7612                 .policy = nl80211_policy,
7613                 .flags = GENL_ADMIN_PERM,
7614                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7615                                   NL80211_FLAG_NEED_RTNL,
7616         },
7617         {
7618                 .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
7619                 .doit = nl80211_set_tx_bitrate_mask,
7620                 .policy = nl80211_policy,
7621                 .flags = GENL_ADMIN_PERM,
7622                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7623                                   NL80211_FLAG_NEED_RTNL,
7624         },
7625         {
7626                 .cmd = NL80211_CMD_REGISTER_FRAME,
7627                 .doit = nl80211_register_mgmt,
7628                 .policy = nl80211_policy,
7629                 .flags = GENL_ADMIN_PERM,
7630                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7631                                   NL80211_FLAG_NEED_RTNL,
7632         },
7633         {
7634                 .cmd = NL80211_CMD_FRAME,
7635                 .doit = nl80211_tx_mgmt,
7636                 .policy = nl80211_policy,
7637                 .flags = GENL_ADMIN_PERM,
7638                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7639                                   NL80211_FLAG_NEED_RTNL,
7640         },
7641         {
7642                 .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
7643                 .doit = nl80211_tx_mgmt_cancel_wait,
7644                 .policy = nl80211_policy,
7645                 .flags = GENL_ADMIN_PERM,
7646                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7647                                   NL80211_FLAG_NEED_RTNL,
7648         },
7649         {
7650                 .cmd = NL80211_CMD_SET_POWER_SAVE,
7651                 .doit = nl80211_set_power_save,
7652                 .policy = nl80211_policy,
7653                 .flags = GENL_ADMIN_PERM,
7654                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7655                                   NL80211_FLAG_NEED_RTNL,
7656         },
7657         {
7658                 .cmd = NL80211_CMD_GET_POWER_SAVE,
7659                 .doit = nl80211_get_power_save,
7660                 .policy = nl80211_policy,
7661                 /* can be retrieved by unprivileged users */
7662                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7663                                   NL80211_FLAG_NEED_RTNL,
7664         },
7665         {
7666                 .cmd = NL80211_CMD_SET_CQM,
7667                 .doit = nl80211_set_cqm,
7668                 .policy = nl80211_policy,
7669                 .flags = GENL_ADMIN_PERM,
7670                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7671                                   NL80211_FLAG_NEED_RTNL,
7672         },
7673         {
7674                 .cmd = NL80211_CMD_SET_CHANNEL,
7675                 .doit = nl80211_set_channel,
7676                 .policy = nl80211_policy,
7677                 .flags = GENL_ADMIN_PERM,
7678                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7679                                   NL80211_FLAG_NEED_RTNL,
7680         },
7681         {
7682                 .cmd = NL80211_CMD_SET_WDS_PEER,
7683                 .doit = nl80211_set_wds_peer,
7684                 .policy = nl80211_policy,
7685                 .flags = GENL_ADMIN_PERM,
7686                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7687                                   NL80211_FLAG_NEED_RTNL,
7688         },
7689         {
7690                 .cmd = NL80211_CMD_JOIN_MESH,
7691                 .doit = nl80211_join_mesh,
7692                 .policy = nl80211_policy,
7693                 .flags = GENL_ADMIN_PERM,
7694                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7695                                   NL80211_FLAG_NEED_RTNL,
7696         },
7697         {
7698                 .cmd = NL80211_CMD_LEAVE_MESH,
7699                 .doit = nl80211_leave_mesh,
7700                 .policy = nl80211_policy,
7701                 .flags = GENL_ADMIN_PERM,
7702                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7703                                   NL80211_FLAG_NEED_RTNL,
7704         },
7705 #ifdef CONFIG_PM
7706         {
7707                 .cmd = NL80211_CMD_GET_WOWLAN,
7708                 .doit = nl80211_get_wowlan,
7709                 .policy = nl80211_policy,
7710                 /* can be retrieved by unprivileged users */
7711                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7712                                   NL80211_FLAG_NEED_RTNL,
7713         },
7714         {
7715                 .cmd = NL80211_CMD_SET_WOWLAN,
7716                 .doit = nl80211_set_wowlan,
7717                 .policy = nl80211_policy,
7718                 .flags = GENL_ADMIN_PERM,
7719                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7720                                   NL80211_FLAG_NEED_RTNL,
7721         },
7722 #endif
7723         {
7724                 .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
7725                 .doit = nl80211_set_rekey_data,
7726                 .policy = nl80211_policy,
7727                 .flags = GENL_ADMIN_PERM,
7728                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7729                                   NL80211_FLAG_NEED_RTNL,
7730         },
7731         {
7732                 .cmd = NL80211_CMD_TDLS_MGMT,
7733                 .doit = nl80211_tdls_mgmt,
7734                 .policy = nl80211_policy,
7735                 .flags = GENL_ADMIN_PERM,
7736                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7737                                   NL80211_FLAG_NEED_RTNL,
7738         },
7739         {
7740                 .cmd = NL80211_CMD_TDLS_OPER,
7741                 .doit = nl80211_tdls_oper,
7742                 .policy = nl80211_policy,
7743                 .flags = GENL_ADMIN_PERM,
7744                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7745                                   NL80211_FLAG_NEED_RTNL,
7746         },
7747         {
7748                 .cmd = NL80211_CMD_UNEXPECTED_FRAME,
7749                 .doit = nl80211_register_unexpected_frame,
7750                 .policy = nl80211_policy,
7751                 .flags = GENL_ADMIN_PERM,
7752                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7753                                   NL80211_FLAG_NEED_RTNL,
7754         },
7755         {
7756                 .cmd = NL80211_CMD_PROBE_CLIENT,
7757                 .doit = nl80211_probe_client,
7758                 .policy = nl80211_policy,
7759                 .flags = GENL_ADMIN_PERM,
7760                 .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
7761                                   NL80211_FLAG_NEED_RTNL,
7762         },
7763         {
7764                 .cmd = NL80211_CMD_REGISTER_BEACONS,
7765                 .doit = nl80211_register_beacons,
7766                 .policy = nl80211_policy,
7767                 .flags = GENL_ADMIN_PERM,
7768                 .internal_flags = NL80211_FLAG_NEED_WIPHY |
7769                                   NL80211_FLAG_NEED_RTNL,
7770         },
7771         {
7772                 .cmd = NL80211_CMD_SET_NOACK_MAP,
7773                 .doit = nl80211_set_noack_map,
7774                 .policy = nl80211_policy,
7775                 .flags = GENL_ADMIN_PERM,
7776                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7777                                   NL80211_FLAG_NEED_RTNL,
7778         },
7779         {
7780                 .cmd = NL80211_CMD_START_P2P_DEVICE,
7781                 .doit = nl80211_start_p2p_device,
7782                 .policy = nl80211_policy,
7783                 .flags = GENL_ADMIN_PERM,
7784                 .internal_flags = NL80211_FLAG_NEED_WDEV |
7785                                   NL80211_FLAG_NEED_RTNL,
7786         },
7787         {
7788                 .cmd = NL80211_CMD_STOP_P2P_DEVICE,
7789                 .doit = nl80211_stop_p2p_device,
7790                 .policy = nl80211_policy,
7791                 .flags = GENL_ADMIN_PERM,
7792                 .internal_flags = NL80211_FLAG_NEED_WDEV_UP |
7793                                   NL80211_FLAG_NEED_RTNL,
7794         },
7795         {
7796                 .cmd = NL80211_CMD_SET_MCAST_RATE,
7797                 .doit = nl80211_set_mcast_rate,
7798                 .policy = nl80211_policy,
7799                 .flags = GENL_ADMIN_PERM,
7800                 .internal_flags = NL80211_FLAG_NEED_NETDEV |
7801                                   NL80211_FLAG_NEED_RTNL,
7802         },
7803 };
7804
7805 static struct genl_multicast_group nl80211_mlme_mcgrp = {
7806         .name = "mlme",
7807 };
7808
7809 /* multicast groups */
7810 static struct genl_multicast_group nl80211_config_mcgrp = {
7811         .name = "config",
7812 };
7813 static struct genl_multicast_group nl80211_scan_mcgrp = {
7814         .name = "scan",
7815 };
7816 static struct genl_multicast_group nl80211_regulatory_mcgrp = {
7817         .name = "regulatory",
7818 };
7819
7820 /* notification functions */
7821
7822 void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
7823 {
7824         struct sk_buff *msg;
7825
7826         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7827         if (!msg)
7828                 return;
7829
7830         if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
7831                 nlmsg_free(msg);
7832                 return;
7833         }
7834
7835         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7836                                 nl80211_config_mcgrp.id, GFP_KERNEL);
7837 }
7838
7839 static int nl80211_add_scan_req(struct sk_buff *msg,
7840                                 struct cfg80211_registered_device *rdev)
7841 {
7842         struct cfg80211_scan_request *req = rdev->scan_req;
7843         struct nlattr *nest;
7844         int i;
7845
7846         ASSERT_RDEV_LOCK(rdev);
7847
7848         if (WARN_ON(!req))
7849                 return 0;
7850
7851         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
7852         if (!nest)
7853                 goto nla_put_failure;
7854         for (i = 0; i < req->n_ssids; i++) {
7855                 if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
7856                         goto nla_put_failure;
7857         }
7858         nla_nest_end(msg, nest);
7859
7860         nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
7861         if (!nest)
7862                 goto nla_put_failure;
7863         for (i = 0; i < req->n_channels; i++) {
7864                 if (nla_put_u32(msg, i, req->channels[i]->center_freq))
7865                         goto nla_put_failure;
7866         }
7867         nla_nest_end(msg, nest);
7868
7869         if (req->ie &&
7870             nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
7871                 goto nla_put_failure;
7872
7873         if (req->flags)
7874                 nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags);
7875
7876         return 0;
7877  nla_put_failure:
7878         return -ENOBUFS;
7879 }
7880
7881 static int nl80211_send_scan_msg(struct sk_buff *msg,
7882                                  struct cfg80211_registered_device *rdev,
7883                                  struct wireless_dev *wdev,
7884                                  u32 portid, u32 seq, int flags,
7885                                  u32 cmd)
7886 {
7887         void *hdr;
7888
7889         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7890         if (!hdr)
7891                 return -1;
7892
7893         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7894             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
7895                                          wdev->netdev->ifindex)) ||
7896             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)))
7897                 goto nla_put_failure;
7898
7899         /* ignore errors and send incomplete event anyway */
7900         nl80211_add_scan_req(msg, rdev);
7901
7902         return genlmsg_end(msg, hdr);
7903
7904  nla_put_failure:
7905         genlmsg_cancel(msg, hdr);
7906         return -EMSGSIZE;
7907 }
7908
7909 static int
7910 nl80211_send_sched_scan_msg(struct sk_buff *msg,
7911                             struct cfg80211_registered_device *rdev,
7912                             struct net_device *netdev,
7913                             u32 portid, u32 seq, int flags, u32 cmd)
7914 {
7915         void *hdr;
7916
7917         hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
7918         if (!hdr)
7919                 return -1;
7920
7921         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
7922             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
7923                 goto nla_put_failure;
7924
7925         return genlmsg_end(msg, hdr);
7926
7927  nla_put_failure:
7928         genlmsg_cancel(msg, hdr);
7929         return -EMSGSIZE;
7930 }
7931
7932 void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
7933                              struct wireless_dev *wdev)
7934 {
7935         struct sk_buff *msg;
7936
7937         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7938         if (!msg)
7939                 return;
7940
7941         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7942                                   NL80211_CMD_TRIGGER_SCAN) < 0) {
7943                 nlmsg_free(msg);
7944                 return;
7945         }
7946
7947         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7948                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7949 }
7950
7951 void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
7952                             struct wireless_dev *wdev)
7953 {
7954         struct sk_buff *msg;
7955
7956         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7957         if (!msg)
7958                 return;
7959
7960         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7961                                   NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
7962                 nlmsg_free(msg);
7963                 return;
7964         }
7965
7966         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7967                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7968 }
7969
7970 void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
7971                                struct wireless_dev *wdev)
7972 {
7973         struct sk_buff *msg;
7974
7975         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7976         if (!msg)
7977                 return;
7978
7979         if (nl80211_send_scan_msg(msg, rdev, wdev, 0, 0, 0,
7980                                   NL80211_CMD_SCAN_ABORTED) < 0) {
7981                 nlmsg_free(msg);
7982                 return;
7983         }
7984
7985         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
7986                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
7987 }
7988
7989 void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
7990                                      struct net_device *netdev)
7991 {
7992         struct sk_buff *msg;
7993
7994         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
7995         if (!msg)
7996                 return;
7997
7998         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
7999                                         NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
8000                 nlmsg_free(msg);
8001                 return;
8002         }
8003
8004         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8005                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8006 }
8007
8008 void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
8009                              struct net_device *netdev, u32 cmd)
8010 {
8011         struct sk_buff *msg;
8012
8013         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8014         if (!msg)
8015                 return;
8016
8017         if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
8018                 nlmsg_free(msg);
8019                 return;
8020         }
8021
8022         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8023                                 nl80211_scan_mcgrp.id, GFP_KERNEL);
8024 }
8025
8026 /*
8027  * This can happen on global regulatory changes or device specific settings
8028  * based on custom world regulatory domains.
8029  */
8030 void nl80211_send_reg_change_event(struct regulatory_request *request)
8031 {
8032         struct sk_buff *msg;
8033         void *hdr;
8034
8035         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8036         if (!msg)
8037                 return;
8038
8039         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
8040         if (!hdr) {
8041                 nlmsg_free(msg);
8042                 return;
8043         }
8044
8045         /* Userspace can always count this one always being set */
8046         if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
8047                 goto nla_put_failure;
8048
8049         if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
8050                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8051                                NL80211_REGDOM_TYPE_WORLD))
8052                         goto nla_put_failure;
8053         } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
8054                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8055                                NL80211_REGDOM_TYPE_CUSTOM_WORLD))
8056                         goto nla_put_failure;
8057         } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
8058                    request->intersect) {
8059                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8060                                NL80211_REGDOM_TYPE_INTERSECTION))
8061                         goto nla_put_failure;
8062         } else {
8063                 if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
8064                                NL80211_REGDOM_TYPE_COUNTRY) ||
8065                     nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
8066                                    request->alpha2))
8067                         goto nla_put_failure;
8068         }
8069
8070         if (wiphy_idx_valid(request->wiphy_idx) &&
8071             nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
8072                 goto nla_put_failure;
8073
8074         genlmsg_end(msg, hdr);
8075
8076         rcu_read_lock();
8077         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8078                                 GFP_ATOMIC);
8079         rcu_read_unlock();
8080
8081         return;
8082
8083 nla_put_failure:
8084         genlmsg_cancel(msg, hdr);
8085         nlmsg_free(msg);
8086 }
8087
8088 static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
8089                                     struct net_device *netdev,
8090                                     const u8 *buf, size_t len,
8091                                     enum nl80211_commands cmd, gfp_t gfp)
8092 {
8093         struct sk_buff *msg;
8094         void *hdr;
8095
8096         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8097         if (!msg)
8098                 return;
8099
8100         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8101         if (!hdr) {
8102                 nlmsg_free(msg);
8103                 return;
8104         }
8105
8106         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8107             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8108             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8109                 goto nla_put_failure;
8110
8111         genlmsg_end(msg, hdr);
8112
8113         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8114                                 nl80211_mlme_mcgrp.id, gfp);
8115         return;
8116
8117  nla_put_failure:
8118         genlmsg_cancel(msg, hdr);
8119         nlmsg_free(msg);
8120 }
8121
8122 void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
8123                           struct net_device *netdev, const u8 *buf,
8124                           size_t len, gfp_t gfp)
8125 {
8126         nl80211_send_mlme_event(rdev, netdev, buf, len,
8127                                 NL80211_CMD_AUTHENTICATE, gfp);
8128 }
8129
8130 void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
8131                            struct net_device *netdev, const u8 *buf,
8132                            size_t len, gfp_t gfp)
8133 {
8134         nl80211_send_mlme_event(rdev, netdev, buf, len,
8135                                 NL80211_CMD_ASSOCIATE, gfp);
8136 }
8137
8138 void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
8139                          struct net_device *netdev, const u8 *buf,
8140                          size_t len, gfp_t gfp)
8141 {
8142         nl80211_send_mlme_event(rdev, netdev, buf, len,
8143                                 NL80211_CMD_DEAUTHENTICATE, gfp);
8144 }
8145
8146 void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
8147                            struct net_device *netdev, const u8 *buf,
8148                            size_t len, gfp_t gfp)
8149 {
8150         nl80211_send_mlme_event(rdev, netdev, buf, len,
8151                                 NL80211_CMD_DISASSOCIATE, gfp);
8152 }
8153
8154 void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
8155                                 struct net_device *netdev, const u8 *buf,
8156                                 size_t len, gfp_t gfp)
8157 {
8158         nl80211_send_mlme_event(rdev, netdev, buf, len,
8159                                 NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
8160 }
8161
8162 void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
8163                                   struct net_device *netdev, const u8 *buf,
8164                                   size_t len, gfp_t gfp)
8165 {
8166         nl80211_send_mlme_event(rdev, netdev, buf, len,
8167                                 NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
8168 }
8169
8170 static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
8171                                       struct net_device *netdev, int cmd,
8172                                       const u8 *addr, gfp_t gfp)
8173 {
8174         struct sk_buff *msg;
8175         void *hdr;
8176
8177         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8178         if (!msg)
8179                 return;
8180
8181         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8182         if (!hdr) {
8183                 nlmsg_free(msg);
8184                 return;
8185         }
8186
8187         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8188             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8189             nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
8190             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8191                 goto nla_put_failure;
8192
8193         genlmsg_end(msg, hdr);
8194
8195         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8196                                 nl80211_mlme_mcgrp.id, gfp);
8197         return;
8198
8199  nla_put_failure:
8200         genlmsg_cancel(msg, hdr);
8201         nlmsg_free(msg);
8202 }
8203
8204 void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
8205                                struct net_device *netdev, const u8 *addr,
8206                                gfp_t gfp)
8207 {
8208         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
8209                                   addr, gfp);
8210 }
8211
8212 void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
8213                                 struct net_device *netdev, const u8 *addr,
8214                                 gfp_t gfp)
8215 {
8216         nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
8217                                   addr, gfp);
8218 }
8219
8220 void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
8221                                  struct net_device *netdev, const u8 *bssid,
8222                                  const u8 *req_ie, size_t req_ie_len,
8223                                  const u8 *resp_ie, size_t resp_ie_len,
8224                                  u16 status, gfp_t gfp)
8225 {
8226         struct sk_buff *msg;
8227         void *hdr;
8228
8229         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8230         if (!msg)
8231                 return;
8232
8233         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
8234         if (!hdr) {
8235                 nlmsg_free(msg);
8236                 return;
8237         }
8238
8239         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8240             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8241             (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
8242             nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
8243             (req_ie &&
8244              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8245             (resp_ie &&
8246              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8247                 goto nla_put_failure;
8248
8249         genlmsg_end(msg, hdr);
8250
8251         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8252                                 nl80211_mlme_mcgrp.id, gfp);
8253         return;
8254
8255  nla_put_failure:
8256         genlmsg_cancel(msg, hdr);
8257         nlmsg_free(msg);
8258
8259 }
8260
8261 void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
8262                          struct net_device *netdev, const u8 *bssid,
8263                          const u8 *req_ie, size_t req_ie_len,
8264                          const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
8265 {
8266         struct sk_buff *msg;
8267         void *hdr;
8268
8269         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8270         if (!msg)
8271                 return;
8272
8273         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
8274         if (!hdr) {
8275                 nlmsg_free(msg);
8276                 return;
8277         }
8278
8279         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8280             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8281             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
8282             (req_ie &&
8283              nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
8284             (resp_ie &&
8285              nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
8286                 goto nla_put_failure;
8287
8288         genlmsg_end(msg, hdr);
8289
8290         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8291                                 nl80211_mlme_mcgrp.id, gfp);
8292         return;
8293
8294  nla_put_failure:
8295         genlmsg_cancel(msg, hdr);
8296         nlmsg_free(msg);
8297
8298 }
8299
8300 void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
8301                                struct net_device *netdev, u16 reason,
8302                                const u8 *ie, size_t ie_len, bool from_ap)
8303 {
8304         struct sk_buff *msg;
8305         void *hdr;
8306
8307         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
8308         if (!msg)
8309                 return;
8310
8311         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
8312         if (!hdr) {
8313                 nlmsg_free(msg);
8314                 return;
8315         }
8316
8317         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8318             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8319             (from_ap && reason &&
8320              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
8321             (from_ap &&
8322              nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
8323             (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
8324                 goto nla_put_failure;
8325
8326         genlmsg_end(msg, hdr);
8327
8328         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8329                                 nl80211_mlme_mcgrp.id, GFP_KERNEL);
8330         return;
8331
8332  nla_put_failure:
8333         genlmsg_cancel(msg, hdr);
8334         nlmsg_free(msg);
8335
8336 }
8337
8338 void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
8339                              struct net_device *netdev, const u8 *bssid,
8340                              gfp_t gfp)
8341 {
8342         struct sk_buff *msg;
8343         void *hdr;
8344
8345         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8346         if (!msg)
8347                 return;
8348
8349         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
8350         if (!hdr) {
8351                 nlmsg_free(msg);
8352                 return;
8353         }
8354
8355         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8356             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8357             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8358                 goto nla_put_failure;
8359
8360         genlmsg_end(msg, hdr);
8361
8362         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8363                                 nl80211_mlme_mcgrp.id, gfp);
8364         return;
8365
8366  nla_put_failure:
8367         genlmsg_cancel(msg, hdr);
8368         nlmsg_free(msg);
8369 }
8370
8371 void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
8372                 struct net_device *netdev,
8373                 const u8 *macaddr, const u8* ie, u8 ie_len,
8374                 gfp_t gfp)
8375 {
8376         struct sk_buff *msg;
8377         void *hdr;
8378
8379         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8380         if (!msg)
8381                 return;
8382
8383         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
8384         if (!hdr) {
8385                 nlmsg_free(msg);
8386                 return;
8387         }
8388
8389         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8390             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8391             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
8392             (ie_len && ie &&
8393              nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
8394                 goto nla_put_failure;
8395
8396         genlmsg_end(msg, hdr);
8397
8398         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8399                                 nl80211_mlme_mcgrp.id, gfp);
8400         return;
8401
8402  nla_put_failure:
8403         genlmsg_cancel(msg, hdr);
8404         nlmsg_free(msg);
8405 }
8406
8407 void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
8408                                  struct net_device *netdev, const u8 *addr,
8409                                  enum nl80211_key_type key_type, int key_id,
8410                                  const u8 *tsc, gfp_t gfp)
8411 {
8412         struct sk_buff *msg;
8413         void *hdr;
8414
8415         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8416         if (!msg)
8417                 return;
8418
8419         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
8420         if (!hdr) {
8421                 nlmsg_free(msg);
8422                 return;
8423         }
8424
8425         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8426             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8427             (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
8428             nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
8429             (key_id != -1 &&
8430              nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
8431             (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
8432                 goto nla_put_failure;
8433
8434         genlmsg_end(msg, hdr);
8435
8436         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8437                                 nl80211_mlme_mcgrp.id, gfp);
8438         return;
8439
8440  nla_put_failure:
8441         genlmsg_cancel(msg, hdr);
8442         nlmsg_free(msg);
8443 }
8444
8445 void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
8446                                     struct ieee80211_channel *channel_before,
8447                                     struct ieee80211_channel *channel_after)
8448 {
8449         struct sk_buff *msg;
8450         void *hdr;
8451         struct nlattr *nl_freq;
8452
8453         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
8454         if (!msg)
8455                 return;
8456
8457         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
8458         if (!hdr) {
8459                 nlmsg_free(msg);
8460                 return;
8461         }
8462
8463         /*
8464          * Since we are applying the beacon hint to a wiphy we know its
8465          * wiphy_idx is valid
8466          */
8467         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
8468                 goto nla_put_failure;
8469
8470         /* Before */
8471         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
8472         if (!nl_freq)
8473                 goto nla_put_failure;
8474         if (nl80211_msg_put_channel(msg, channel_before))
8475                 goto nla_put_failure;
8476         nla_nest_end(msg, nl_freq);
8477
8478         /* After */
8479         nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
8480         if (!nl_freq)
8481                 goto nla_put_failure;
8482         if (nl80211_msg_put_channel(msg, channel_after))
8483                 goto nla_put_failure;
8484         nla_nest_end(msg, nl_freq);
8485
8486         genlmsg_end(msg, hdr);
8487
8488         rcu_read_lock();
8489         genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
8490                                 GFP_ATOMIC);
8491         rcu_read_unlock();
8492
8493         return;
8494
8495 nla_put_failure:
8496         genlmsg_cancel(msg, hdr);
8497         nlmsg_free(msg);
8498 }
8499
8500 static void nl80211_send_remain_on_chan_event(
8501         int cmd, struct cfg80211_registered_device *rdev,
8502         struct wireless_dev *wdev, u64 cookie,
8503         struct ieee80211_channel *chan,
8504         unsigned int duration, gfp_t gfp)
8505 {
8506         struct sk_buff *msg;
8507         void *hdr;
8508
8509         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8510         if (!msg)
8511                 return;
8512
8513         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8514         if (!hdr) {
8515                 nlmsg_free(msg);
8516                 return;
8517         }
8518
8519         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8520             (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8521                                          wdev->netdev->ifindex)) ||
8522             nla_put_u64(msg, NL80211_ATTR_WDEV, wdev_id(wdev)) ||
8523             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
8524             nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
8525                         NL80211_CHAN_NO_HT) ||
8526             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
8527                 goto nla_put_failure;
8528
8529         if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
8530             nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
8531                 goto nla_put_failure;
8532
8533         genlmsg_end(msg, hdr);
8534
8535         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8536                                 nl80211_mlme_mcgrp.id, gfp);
8537         return;
8538
8539  nla_put_failure:
8540         genlmsg_cancel(msg, hdr);
8541         nlmsg_free(msg);
8542 }
8543
8544 void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
8545                                     struct wireless_dev *wdev, u64 cookie,
8546                                     struct ieee80211_channel *chan,
8547                                     unsigned int duration, gfp_t gfp)
8548 {
8549         nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
8550                                           rdev, wdev, cookie, chan,
8551                                           duration, gfp);
8552 }
8553
8554 void nl80211_send_remain_on_channel_cancel(
8555         struct cfg80211_registered_device *rdev,
8556         struct wireless_dev *wdev,
8557         u64 cookie, struct ieee80211_channel *chan, gfp_t gfp)
8558 {
8559         nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
8560                                           rdev, wdev, cookie, chan, 0, gfp);
8561 }
8562
8563 void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
8564                             struct net_device *dev, const u8 *mac_addr,
8565                             struct station_info *sinfo, gfp_t gfp)
8566 {
8567         struct sk_buff *msg;
8568
8569         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8570         if (!msg)
8571                 return;
8572
8573         if (nl80211_send_station(msg, 0, 0, 0,
8574                                  rdev, dev, mac_addr, sinfo) < 0) {
8575                 nlmsg_free(msg);
8576                 return;
8577         }
8578
8579         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8580                                 nl80211_mlme_mcgrp.id, gfp);
8581 }
8582
8583 void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
8584                                 struct net_device *dev, const u8 *mac_addr,
8585                                 gfp_t gfp)
8586 {
8587         struct sk_buff *msg;
8588         void *hdr;
8589
8590         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8591         if (!msg)
8592                 return;
8593
8594         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
8595         if (!hdr) {
8596                 nlmsg_free(msg);
8597                 return;
8598         }
8599
8600         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8601             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
8602                 goto nla_put_failure;
8603
8604         genlmsg_end(msg, hdr);
8605
8606         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8607                                 nl80211_mlme_mcgrp.id, gfp);
8608         return;
8609
8610  nla_put_failure:
8611         genlmsg_cancel(msg, hdr);
8612         nlmsg_free(msg);
8613 }
8614
8615 void nl80211_send_conn_failed_event(struct cfg80211_registered_device *rdev,
8616                                     struct net_device *dev, const u8 *mac_addr,
8617                                     enum nl80211_connect_failed_reason reason,
8618                                     gfp_t gfp)
8619 {
8620         struct sk_buff *msg;
8621         void *hdr;
8622
8623         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8624         if (!msg)
8625                 return;
8626
8627         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
8628         if (!hdr) {
8629                 nlmsg_free(msg);
8630                 return;
8631         }
8632
8633         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8634             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
8635             nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
8636                 goto nla_put_failure;
8637
8638         genlmsg_end(msg, hdr);
8639
8640         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8641                                 nl80211_mlme_mcgrp.id, gfp);
8642         return;
8643
8644  nla_put_failure:
8645         genlmsg_cancel(msg, hdr);
8646         nlmsg_free(msg);
8647 }
8648
8649 static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
8650                                        const u8 *addr, gfp_t gfp)
8651 {
8652         struct wireless_dev *wdev = dev->ieee80211_ptr;
8653         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
8654         struct sk_buff *msg;
8655         void *hdr;
8656         int err;
8657         u32 nlportid = ACCESS_ONCE(wdev->ap_unexpected_nlportid);
8658
8659         if (!nlportid)
8660                 return false;
8661
8662         msg = nlmsg_new(100, gfp);
8663         if (!msg)
8664                 return true;
8665
8666         hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
8667         if (!hdr) {
8668                 nlmsg_free(msg);
8669                 return true;
8670         }
8671
8672         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8673             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
8674             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
8675                 goto nla_put_failure;
8676
8677         err = genlmsg_end(msg, hdr);
8678         if (err < 0) {
8679                 nlmsg_free(msg);
8680                 return true;
8681         }
8682
8683         genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8684         return true;
8685
8686  nla_put_failure:
8687         genlmsg_cancel(msg, hdr);
8688         nlmsg_free(msg);
8689         return true;
8690 }
8691
8692 bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
8693 {
8694         return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
8695                                           addr, gfp);
8696 }
8697
8698 bool nl80211_unexpected_4addr_frame(struct net_device *dev,
8699                                     const u8 *addr, gfp_t gfp)
8700 {
8701         return __nl80211_unexpected_frame(dev,
8702                                           NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
8703                                           addr, gfp);
8704 }
8705
8706 int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
8707                       struct wireless_dev *wdev, u32 nlportid,
8708                       int freq, int sig_dbm,
8709                       const u8 *buf, size_t len, gfp_t gfp)
8710 {
8711         struct net_device *netdev = wdev->netdev;
8712         struct sk_buff *msg;
8713         void *hdr;
8714
8715         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8716         if (!msg)
8717                 return -ENOMEM;
8718
8719         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
8720         if (!hdr) {
8721                 nlmsg_free(msg);
8722                 return -ENOMEM;
8723         }
8724
8725         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8726             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8727                                         netdev->ifindex)) ||
8728             nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
8729             (sig_dbm &&
8730              nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
8731             nla_put(msg, NL80211_ATTR_FRAME, len, buf))
8732                 goto nla_put_failure;
8733
8734         genlmsg_end(msg, hdr);
8735
8736         return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
8737
8738  nla_put_failure:
8739         genlmsg_cancel(msg, hdr);
8740         nlmsg_free(msg);
8741         return -ENOBUFS;
8742 }
8743
8744 void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
8745                                  struct wireless_dev *wdev, u64 cookie,
8746                                  const u8 *buf, size_t len, bool ack,
8747                                  gfp_t gfp)
8748 {
8749         struct net_device *netdev = wdev->netdev;
8750         struct sk_buff *msg;
8751         void *hdr;
8752
8753         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8754         if (!msg)
8755                 return;
8756
8757         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
8758         if (!hdr) {
8759                 nlmsg_free(msg);
8760                 return;
8761         }
8762
8763         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8764             (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
8765                                    netdev->ifindex)) ||
8766             nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
8767             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
8768             (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
8769                 goto nla_put_failure;
8770
8771         genlmsg_end(msg, hdr);
8772
8773         genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
8774         return;
8775
8776  nla_put_failure:
8777         genlmsg_cancel(msg, hdr);
8778         nlmsg_free(msg);
8779 }
8780
8781 void
8782 nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
8783                              struct net_device *netdev,
8784                              enum nl80211_cqm_rssi_threshold_event rssi_event,
8785                              gfp_t gfp)
8786 {
8787         struct sk_buff *msg;
8788         struct nlattr *pinfoattr;
8789         void *hdr;
8790
8791         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8792         if (!msg)
8793                 return;
8794
8795         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8796         if (!hdr) {
8797                 nlmsg_free(msg);
8798                 return;
8799         }
8800
8801         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8802             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8803                 goto nla_put_failure;
8804
8805         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8806         if (!pinfoattr)
8807                 goto nla_put_failure;
8808
8809         if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
8810                         rssi_event))
8811                 goto nla_put_failure;
8812
8813         nla_nest_end(msg, pinfoattr);
8814
8815         genlmsg_end(msg, hdr);
8816
8817         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8818                                 nl80211_mlme_mcgrp.id, gfp);
8819         return;
8820
8821  nla_put_failure:
8822         genlmsg_cancel(msg, hdr);
8823         nlmsg_free(msg);
8824 }
8825
8826 void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
8827                               struct net_device *netdev, const u8 *bssid,
8828                               const u8 *replay_ctr, gfp_t gfp)
8829 {
8830         struct sk_buff *msg;
8831         struct nlattr *rekey_attr;
8832         void *hdr;
8833
8834         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8835         if (!msg)
8836                 return;
8837
8838         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
8839         if (!hdr) {
8840                 nlmsg_free(msg);
8841                 return;
8842         }
8843
8844         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8845             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8846             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
8847                 goto nla_put_failure;
8848
8849         rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
8850         if (!rekey_attr)
8851                 goto nla_put_failure;
8852
8853         if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
8854                     NL80211_REPLAY_CTR_LEN, replay_ctr))
8855                 goto nla_put_failure;
8856
8857         nla_nest_end(msg, rekey_attr);
8858
8859         genlmsg_end(msg, hdr);
8860
8861         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8862                                 nl80211_mlme_mcgrp.id, gfp);
8863         return;
8864
8865  nla_put_failure:
8866         genlmsg_cancel(msg, hdr);
8867         nlmsg_free(msg);
8868 }
8869
8870 void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
8871                                     struct net_device *netdev, int index,
8872                                     const u8 *bssid, bool preauth, gfp_t gfp)
8873 {
8874         struct sk_buff *msg;
8875         struct nlattr *attr;
8876         void *hdr;
8877
8878         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8879         if (!msg)
8880                 return;
8881
8882         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
8883         if (!hdr) {
8884                 nlmsg_free(msg);
8885                 return;
8886         }
8887
8888         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8889             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8890                 goto nla_put_failure;
8891
8892         attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
8893         if (!attr)
8894                 goto nla_put_failure;
8895
8896         if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
8897             nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
8898             (preauth &&
8899              nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
8900                 goto nla_put_failure;
8901
8902         nla_nest_end(msg, attr);
8903
8904         genlmsg_end(msg, hdr);
8905
8906         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8907                                 nl80211_mlme_mcgrp.id, gfp);
8908         return;
8909
8910  nla_put_failure:
8911         genlmsg_cancel(msg, hdr);
8912         nlmsg_free(msg);
8913 }
8914
8915 void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
8916                               struct net_device *netdev,
8917                               struct cfg80211_chan_def *chandef, gfp_t gfp)
8918 {
8919         struct sk_buff *msg;
8920         void *hdr;
8921
8922         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
8923         if (!msg)
8924                 return;
8925
8926         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
8927         if (!hdr) {
8928                 nlmsg_free(msg);
8929                 return;
8930         }
8931
8932         if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
8933                 goto nla_put_failure;
8934
8935         if (nl80211_send_chandef(msg, chandef))
8936                 goto nla_put_failure;
8937
8938         genlmsg_end(msg, hdr);
8939
8940         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8941                                 nl80211_mlme_mcgrp.id, gfp);
8942         return;
8943
8944  nla_put_failure:
8945         genlmsg_cancel(msg, hdr);
8946         nlmsg_free(msg);
8947 }
8948
8949 void
8950 nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
8951                             struct net_device *netdev, const u8 *peer,
8952                             u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
8953 {
8954         struct sk_buff *msg;
8955         struct nlattr *pinfoattr;
8956         void *hdr;
8957
8958         msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
8959         if (!msg)
8960                 return;
8961
8962         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
8963         if (!hdr) {
8964                 nlmsg_free(msg);
8965                 return;
8966         }
8967
8968         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
8969             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
8970             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
8971                 goto nla_put_failure;
8972
8973         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
8974         if (!pinfoattr)
8975                 goto nla_put_failure;
8976
8977         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
8978                 goto nla_put_failure;
8979
8980         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
8981                 goto nla_put_failure;
8982
8983         if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
8984                 goto nla_put_failure;
8985
8986         nla_nest_end(msg, pinfoattr);
8987
8988         genlmsg_end(msg, hdr);
8989
8990         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
8991                                 nl80211_mlme_mcgrp.id, gfp);
8992         return;
8993
8994  nla_put_failure:
8995         genlmsg_cancel(msg, hdr);
8996         nlmsg_free(msg);
8997 }
8998
8999 void
9000 nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
9001                                 struct net_device *netdev, const u8 *peer,
9002                                 u32 num_packets, gfp_t gfp)
9003 {
9004         struct sk_buff *msg;
9005         struct nlattr *pinfoattr;
9006         void *hdr;
9007
9008         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9009         if (!msg)
9010                 return;
9011
9012         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
9013         if (!hdr) {
9014                 nlmsg_free(msg);
9015                 return;
9016         }
9017
9018         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9019             nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
9020             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
9021                 goto nla_put_failure;
9022
9023         pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
9024         if (!pinfoattr)
9025                 goto nla_put_failure;
9026
9027         if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
9028                 goto nla_put_failure;
9029
9030         nla_nest_end(msg, pinfoattr);
9031
9032         genlmsg_end(msg, hdr);
9033
9034         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9035                                 nl80211_mlme_mcgrp.id, gfp);
9036         return;
9037
9038  nla_put_failure:
9039         genlmsg_cancel(msg, hdr);
9040         nlmsg_free(msg);
9041 }
9042
9043 void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
9044                            u64 cookie, bool acked, gfp_t gfp)
9045 {
9046         struct wireless_dev *wdev = dev->ieee80211_ptr;
9047         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9048         struct sk_buff *msg;
9049         void *hdr;
9050         int err;
9051
9052         trace_cfg80211_probe_status(dev, addr, cookie, acked);
9053
9054         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9055
9056         if (!msg)
9057                 return;
9058
9059         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
9060         if (!hdr) {
9061                 nlmsg_free(msg);
9062                 return;
9063         }
9064
9065         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9066             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9067             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
9068             nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
9069             (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
9070                 goto nla_put_failure;
9071
9072         err = genlmsg_end(msg, hdr);
9073         if (err < 0) {
9074                 nlmsg_free(msg);
9075                 return;
9076         }
9077
9078         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9079                                 nl80211_mlme_mcgrp.id, gfp);
9080         return;
9081
9082  nla_put_failure:
9083         genlmsg_cancel(msg, hdr);
9084         nlmsg_free(msg);
9085 }
9086 EXPORT_SYMBOL(cfg80211_probe_status);
9087
9088 void cfg80211_report_obss_beacon(struct wiphy *wiphy,
9089                                  const u8 *frame, size_t len,
9090                                  int freq, int sig_dbm)
9091 {
9092         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
9093         struct sk_buff *msg;
9094         void *hdr;
9095         struct cfg80211_beacon_registration *reg;
9096
9097         trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);
9098
9099         spin_lock_bh(&rdev->beacon_registrations_lock);
9100         list_for_each_entry(reg, &rdev->beacon_registrations, list) {
9101                 msg = nlmsg_new(len + 100, GFP_ATOMIC);
9102                 if (!msg) {
9103                         spin_unlock_bh(&rdev->beacon_registrations_lock);
9104                         return;
9105                 }
9106
9107                 hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
9108                 if (!hdr)
9109                         goto nla_put_failure;
9110
9111                 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9112                     (freq &&
9113                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
9114                     (sig_dbm &&
9115                      nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
9116                     nla_put(msg, NL80211_ATTR_FRAME, len, frame))
9117                         goto nla_put_failure;
9118
9119                 genlmsg_end(msg, hdr);
9120
9121                 genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
9122         }
9123         spin_unlock_bh(&rdev->beacon_registrations_lock);
9124         return;
9125
9126  nla_put_failure:
9127         spin_unlock_bh(&rdev->beacon_registrations_lock);
9128         if (hdr)
9129                 genlmsg_cancel(msg, hdr);
9130         nlmsg_free(msg);
9131 }
9132 EXPORT_SYMBOL(cfg80211_report_obss_beacon);
9133
9134 void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
9135                                 enum nl80211_tdls_operation oper,
9136                                 u16 reason_code, gfp_t gfp)
9137 {
9138         struct wireless_dev *wdev = dev->ieee80211_ptr;
9139         struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
9140         struct sk_buff *msg;
9141         void *hdr;
9142         int err;
9143
9144         trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
9145                                          reason_code);
9146
9147         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
9148         if (!msg)
9149                 return;
9150
9151         hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
9152         if (!hdr) {
9153                 nlmsg_free(msg);
9154                 return;
9155         }
9156
9157         if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
9158             nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
9159             nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
9160             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
9161             (reason_code > 0 &&
9162              nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
9163                 goto nla_put_failure;
9164
9165         err = genlmsg_end(msg, hdr);
9166         if (err < 0) {
9167                 nlmsg_free(msg);
9168                 return;
9169         }
9170
9171         genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
9172                                 nl80211_mlme_mcgrp.id, gfp);
9173         return;
9174
9175  nla_put_failure:
9176         genlmsg_cancel(msg, hdr);
9177         nlmsg_free(msg);
9178 }
9179 EXPORT_SYMBOL(cfg80211_tdls_oper_request);
9180
9181 static int nl80211_netlink_notify(struct notifier_block * nb,
9182                                   unsigned long state,
9183                                   void *_notify)
9184 {
9185         struct netlink_notify *notify = _notify;
9186         struct cfg80211_registered_device *rdev;
9187         struct wireless_dev *wdev;
9188         struct cfg80211_beacon_registration *reg, *tmp;
9189
9190         if (state != NETLINK_URELEASE)
9191                 return NOTIFY_DONE;
9192
9193         rcu_read_lock();
9194
9195         list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
9196                 list_for_each_entry_rcu(wdev, &rdev->wdev_list, list)
9197                         cfg80211_mlme_unregister_socket(wdev, notify->portid);
9198
9199                 spin_lock_bh(&rdev->beacon_registrations_lock);
9200                 list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
9201                                          list) {
9202                         if (reg->nlportid == notify->portid) {
9203                                 list_del(&reg->list);
9204                                 kfree(reg);
9205                                 break;
9206                         }
9207                 }
9208                 spin_unlock_bh(&rdev->beacon_registrations_lock);
9209         }
9210
9211         rcu_read_unlock();
9212
9213         return NOTIFY_DONE;
9214 }
9215
9216 static struct notifier_block nl80211_netlink_notifier = {
9217         .notifier_call = nl80211_netlink_notify,
9218 };
9219
9220 /* initialisation/exit functions */
9221
9222 int nl80211_init(void)
9223 {
9224         int err;
9225
9226         err = genl_register_family_with_ops(&nl80211_fam,
9227                 nl80211_ops, ARRAY_SIZE(nl80211_ops));
9228         if (err)
9229                 return err;
9230
9231         err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
9232         if (err)
9233                 goto err_out;
9234
9235         err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
9236         if (err)
9237                 goto err_out;
9238
9239         err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
9240         if (err)
9241                 goto err_out;
9242
9243         err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
9244         if (err)
9245                 goto err_out;
9246
9247 #ifdef CONFIG_NL80211_TESTMODE
9248         err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
9249         if (err)
9250                 goto err_out;
9251 #endif
9252
9253         err = netlink_register_notifier(&nl80211_netlink_notifier);
9254         if (err)
9255                 goto err_out;
9256
9257         return 0;
9258  err_out:
9259         genl_unregister_family(&nl80211_fam);
9260         return err;
9261 }
9262
9263 void nl80211_exit(void)
9264 {
9265         netlink_unregister_notifier(&nl80211_netlink_notifier);
9266         genl_unregister_family(&nl80211_fam);
9267 }